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    • 专利摘要:
    The invention relates to an interconnection device (20) for battery elements (12) comprising at least one electrical conductor strip (22) with at least one contact zone (30) for battery element, and at least one magnet (32), permanent, associated with the contact area (30) and configured for application of the contact area (30) to a terminal (14+) of a battery cell (12) by magnetic interaction with the battery element. According to the invention: - the contact zone (30) of the ribbon has a stamping relief (34) of the ribbon, the embossing relief (34) forming a magnet receptacle, - the magnet (32) is housed in said magnet receptacle. The invention also relates to an accumulator battery using the interconnection device. Application to power tool batteries, in particular.
    公开号:FR3056022A1
    申请号:FR1658489
    申请日:2016-09-13
    公开日:2018-03-16
    发明作者:Roger Pellenc
    申请人:Pellenc SAS；
    IPC主号:
    专利说明:

    (54) DEVICE FOR ELECTRICALLY INTERCONNECTING BATTERY ELEMENTS AND ACCUMULATOR BATTERY PROVIDED WITH SUCH A DEVICE.
    The invention relates to an interconnection device (20) for battery cells (12) comprising at least one electrically conductive strip (22) with at least one contact zone (30) for battery cell, and at least a permanent magnet (32) associated with the contact area (30) and configured for applying the contact area (30) to a terminal (14+) of a battery cell (12) by magnetic interaction with the battery cell. According to the invention:
    the contact zone (30) of the ribbon has a stamping relief (34) of the ribbon, the stamping relief (34) forming a receptacle for a magnet,
    - The magnet (32) is housed in said magnet receptacle.
    The invention also relates to a storage battery using the interconnection device.
    Application to power tool batteries, in particular.
    i
    Device for the electrical interconnection of battery cells and storage battery provided with such a device
    Technical field i present invention relates to a device for interconnecting battery cells and a battery fitted with such a device.
    Battery nents are accumulators of electrical energy placed in series and / or in parallel for the formation of a storage battery. The placing in series and / or in parallel of the ball elements enables electrical energy to be supplied with a voltage and a current suitable for electrical equipment for which the battery is intended. The Interconnection of the battery cells also allows for concomitant recharging of electrical energy.
    The present invention finds applications for the energy supply of electrical equipment or power tools. Elf also has applications for aiimentatb 1 bergie light vehicles, such as electric lawn mowers or power road vehicles, for example. In general, the invention finds applications for any battery using juxtaposed battery cells and in particular cylindrical cells. State of the prior art
    Significant advances in <s 1 icîté uu · ', t 1 vj reduction in their weight, have generalized the use of electric motors equipment or tools traditionally equipped with heat engines.
    This is the case, for example, with electrical equipment or tools such as hedge covers, chainsaws or blowers.
    · -> C transfers or tools considered, the battery can be fixed on the equipment, can be integrated into the body of the tool, or can be worn on the belt or on the back of a user.
    u · »h. Electric taries can be dedicated to a specific tool or can be adaptable to different tools.
    The batteries can comprise standard battery cells, generally in the form of cylinders, juxtaposed and electrically connected by means of electrical interconnection conductors. From standard elements there is, for example, prismatic shapes which can also be assembled from batteries.
    i. quarter of the electrical contacts between '*,>, n < ( "i, rte" t (os ίο interconnection conductors is not a critical parameter when the battery must deliver only low currents, for example a few milliamps) .
    Indeed, the power P dissipated at the level of a resistance contact R for the supply of a current I is given by (a toi de Ohm; P = R * I 2. Thus, a very weak current dissipates a power negligible in contact even with a relatively high contact resistance. On the other hand, this power being proportional to the square of the current which crosses the contact, it is understood that it is quickly very important for strong currents. The energy lost by contacts to resist then comes not insignificant, it also increases with the number of contacts existing within your battery, and because of the two terminals, positive and negative, of each battery element.
    This is your case, for example, for batteries having to deliver powers equal to 2000W, or even more, having a high number of battery cells, often reaching several tens and ten elements with currents of several amperes passing through each contact. This is even more the case for batteries comprising hundreds, even thousands of cells.
    Typically, known batteries made up of> 2 lithium / ion batteries in series and 8 elements in parallel, i.e. 96 battery elements> i sial, deliver, under a nominal voltage of 44 votes, a total current which may be greater than 45 Amperes, therefore greater than SÔ amperes per n wj A s ov trontact of battery element in operation, for a power of 2000 Watts.
    Thus, for high power batteries, it is necessary to take precautions to limit the electrical resistance of the contact of the interconnection conductor and the terminals of the battery cells. A large current flowing through these parts would, in summer <", mi, goose to generate an unacceptable heating by Joule effect if the contact resistance is high, but above all an energy dissipated unnecessarily to the detriment of the working autonomy of the tool or equipment connected to the battery.
    Particularly reduced contact resistance can be achieved by electrical spot welding of the interconnecting conductor directly across the terminals of the battery cells. A spot weld has, in fact, a particularly low contact resistance, generally between 0.08 and
    0.13 milli-ohms.
    In ΓβΗ>> ! ro, j ,,, a ”, 'p f ” j “f ages to have a small contact surface and to be sensitive to vibrations and shocks. Given the large number of battery binders, in powerful batteries, the multiplication of welds per point is done at the expense of the reliability of the battery. In fact, the shock and vibration stresses on such an assembly lead to fatigue phenomena at the level of the contacts progressively generating cracks on your weld spots - - cracks tend to cause an oxidative effect on your weld which leads , d ros) ro, <> considerably increase their contact resistance and, on the other hand, a partial or total rupture of the contact. These phenomena can make your battery Inoperative. Damaging short circuits can also result from contact fatigue phenomena.
    The use of a power bat with soldered contacts is therefore a problem on electric mowers. Tools exposed to shocks and vibrations.
    In addition, the welded battery lease items have a high dismantling cost at the end of their life, due to the difficulties of the welded battery.
    Finally, a combination of conductive tracks in copper or aluminum and battery cells in mild steel containers poses compatibility problems for your welding. Better compatibility is obtained with steel or nickel tracks but at the cost of unacceptable electrical resistivity.
    Better immunity to shocks and vibrations is obtained by replacing the solder contact between the interconnection conductor and to 'good'.! dw battery cells by a contact by r c / Λ n.
    C a Crament FR 2 920 913 shows a battery in which interconnecting strips have contact zones held against the terminals of the battery cells by elastic pressure means. there are, for example, flexible tabs that press the contact areas against the battery cells.
    The contact resistance between the interconnection strips and the battery cells depends in this case on the amount of pressure exerted on these parts to keep them in contact.
    A quality contact therefore requires spring means of high stiffness to generate significant support forces.
    Ln tmwtti ,, (The use of powerful springs is not a problem when the number of battery cells to be interconnected is low. On the other hand, it becomes problematic for batteries with a large number of battery cells.
    Indeed, the sum of the support forces of the contact zones on the terminals of the battery cells generates a significant mechanical reaction force on the case of your battery which surrounds the battery cells. It is thus necessary to provide a support structure and a dimensioned housing to deform the cumulative pressure of the springs.
    This solution turns out * v> Uisfaisarrte for batteries worn 8k f s oh the belt of a user. The additional weight and volume that iataptation of the battery case causes to mechanical constraints, goes against a general objective of lightening the batteries and making them compact.
    Another solution enew hct "'use permanent magnets in the poles positlto a vxMtife of the battery cells to connect them. By way of illustration, document US2008 / 0220293 can be cited, which plans to integrate permanent magnets into the positive poles of fine prismatic battery elements. The magnets exert a magnetic force of attraction which allows a stacking of element *. h s battery and their connection to a magnetic contact, current flows directly through the permanent magnet, that is to say through a material known for its relatively high electrical resistance.
    SUMMARY OF THE INVENTION The object of the present invention is u> v * / 1 a device for the electrical interconnection of reliable battery cells which does not have the limitations of known connection devices.
    Another aim is to propose an electrical interconnection device with a fgu 'o * ance of counter * between -Λ ·' w ! r battery cells to be connected.
    Another aim is to propose an electrical interconnection device adapted to Μ, fa.v b ··, “k high power, for example, h h. able to deliver a power of 2000 or 3000 watt.
    Yet another object of the invention is to propose such an interconnection device implying only a limited increase in the weight of the battery.
    Finally, an object is to propose an interconnection device having a lower manufacturing cost than the known devices, and in particular, a lower manufacturing cost than an interconnection).
    To achieve s, the invention provides an electrical interconnection device for battery cells comprising at least one electrically conductive strip with at least one contact zone for battery cell, and at least one permanent magnet associated with the zone. contact and configured for application of the contact zone on a terminal of a battery cell by magnetic interaction with the battery cell. In accordance with the invention:
    the contact zone of the ribbon has a stamping relief of the ribbon, the stamping relief forming a receptacle for a magnet,
    - The magnet is housed in said magnet receptacle.
    Such an interconnection device intended for battery cells with terminals made of a material having ferromagnetic properties, or terminals associated with a ferromagnetic material, that is to say a material on which the magnet can exert a force of attraction.
    It is considered that the stamping relief forms a receptacle for the magnet when it matches the shape of at least a part of the magnet, so as to achieve, with this part, a junction by complementary shape or a junction by friction.
    In your description which follows, and unless otherwise specified, reference is made to a single conductive tape and a single contact area of this tape. It will be kept, however, in mind that this is only a simplification of the presentation but that the interconnection device can comprise a plurality of conductive tapes and each ribbon can include a plurality of contact zones. In particular, for the interconnection of the elements of a battery, a total contact number corresponding to the number of terminals of the battery elements can be envisaged.
    Thanks to your configuration of the contact area of the invention, it is possible to reduce or even cancel an air gap distance between the magnet and the battery element against which the magnet applies your contact area. It is thus possible to use contact zones and small magnets by limiting the weight of these magnets, and guaranteeing satisfactory electrical contact.
    In addition, the use of a magnet to hold the contact zones against the terminals of the battery cells makes it possible to guarantee a reliable electrical contact, not very sensitive to shocks and vibrations. Indeed, such contacts allow relative freedom of movement of the elements with respect to each other as a function of the stresses on the battery while maintaining contact with you at the level of the contact zones.
    The relief of your contact area is clear; »N n ni urt„ p h stamping of the ribbon. The stamping can have Iteu, oar "-wmple, by means of a matrix and a punch adapted to the relief, and to your size of the magnet having to take place in the receptacle formed by the relief.
    ï Preferably, each contact zone may include an openwork and an electrical contact surface. The openwork may be "for example, in the form of a single hole" made in the conductive tape in the middle of the contact area. This hole can be formed at the time of the stamping of the relief, by one end of the punch passing through the conductive tape.
    In addition to further reducing the air gap between the magnet and the volume of the battery element against which the contact zone is applied, in particular the terminal is convex, the perforation of the contact zone makes it possible to provide a point-to-point contact. It is t / vtairiOe that the contact is multiple point when the surface of the terminal of a battery element, which generally has a certain convexity, comes into contact with the contact area not at a single point but in a plurality of points ”for example a © crown of points surrounding the openwork. This results in lower electrical contact resistance.
    According to an advantageous feature of the invention, the device may further comprise, for each contact zone, a magnetic flux guide associated with the permanent magnet. The magnetic flux guide, considerably increasing the weight of the interconnection device allows you to channel your magnetic flux lines from the magnet and to reinforce its action on the elements for better support of the contact zones on your battery elements. obtained ”even as a lower electrical resistance of a smaller and lighter magnet caito can also be used.
    Furthermore, the interconnection device may also include, for each contact zone, a crimping armature of the magnet on the stamping relief. The crimping frame is preferably arranged around the magnet receptacle formed by the stamping relief. The crimping frame makes it possible to guarantee that the magnet is held securely in its housing and therefore that there is good electrical contact, © despite shocks or vibrations which the electric battery could undergo.
    Advantageously, the crimping armature can constitute the magnetic flux guide. This characteristic simplifies crimping and lightens the interconnection device.
    According to a particular embodiment of the device of the invention, the magnet can have a cylindrical shape, and the crimping reinforcement can be a ring coaxial with the magnet and surrounding the magnet. More precisely, part of the ribbon which forms the receptacle for the magnet, can be interposed between the crimping frame and the magnet, for crimping the magnet in its receptacle.
    The crimping frame, in particular when it forms a magnetic flux guide, can also be in the form of a capsule or a pot covering one of the poles of the permanent magnet. This embodiment allows to further strengthen the action of the magnet.
    In a particularly advantageous manner, the contact zone can be configured to extend substantially along a connection plane and at least one of the magnet and of the magnetic flux guide can be arranged to be flush with the connection plane.
    This configuration has the particularity of canceling the air gap between the magnet, or the magnetic flux guide, and the terminal of the battery element on which the contact zone is applied.
    Reducing or even canceling the air gap makes it possible to maximize the attractive forces of the magnet and to increase the contact pressure exerted by the magnet. This results in lower electrical contact resistance and the possibility of using smaller and lighter magnets.
    The magnetic flux guide may preferably be one of a soft iron guide and a magnetic guide. If it is a magnetic guide, its action is combined with that of the magnet, while strengthening that of the magnet.
    Unlike known devices, the conductive tape of the interconnection device of the invention need not have any elastic property, nor any spring effect, to apply the contact areas to the battery cells. The application is simply due to magnetic forces. Thus, and advantageously, the electrical conductive tape can count peut ίρ ujimn do copper .SM dho m-teué by a thin and light copper tape. According to other possibilrteb m g ban can be made of a material having low magnetic characteristics and above all a very low resistivity of A Hmiter your energy losses both at the contact areas but also in the connector tape. It can thus be made of metal materials such as silver, aluminum, gold, or other non-magnethium substrates, more important, such as nickel or te hdon, but preferably coated with gold, silver, copper or aluminum.
    Copper has the particularity of excellent electrical conductivity! conductive tape ^ so be thin while maintaining a low electrical resistance. The electrically conductive tape may, for example, have a thickness between 50 and 200 micrometers. The thinness of the tape also makes it easily deformable and ductile to accompany the contact zone with a terminal of a battery element without exerting a pel that is liable to oppose the action of the magnet.
    K results in reliable contact with a low electrical resistance, electric inductor may still have a silver plating The silver plating may have a thickness of the order of 2 micrometers, for example.
    According to a particular embodiment of the electrically conductive tape, the latter may have the shape of an elongated strip with a plurality of transverse and substantially coplanar appendages, each appendage being provided with a contact zone. Such a conformation of the ribbon proves to be particularly suitable for battery cells arranged in a regular matrix.
    t ww i.3n also relates to an electric storage battery comprising a plurality of battery cells having connection terminals and at least one interconnection device, as described above, and connecting terminals of the cells together of battery.
    According to a possible embodiment of the battery, the latter may comprise at least one connection plane, each element of the battery having a terminal located at "annexation. In this case, the electrical interconnection device connects, between them, terminals of several battery cells located in the connection plane.
    When the battery cells are in the form of bars, each end of which forms an electrical terminal, the battery can have two connection planes in which the opposite electrical terminals of each battery cell are located respectively.
    In this case, and according to a possible embodiment of the battery of the invention, the battery elements can be cylindrical elements extending perpendicular to the connection planes.
    The battery can also include at least one electrical insulator having openings associated with terminals of the battery elements. In that case,
    - the electrical interconnection device may have an electrically conductive tape extending essentially along a ribbon plane, the ribbon plane being substantially parallel to the connection plane,
    the interconnection device may have a plurality of contact zones, the contact zones projecting from the ribbon plane in the direction of the connection plane,
    - For each contact zone, at least one of the stamping relief, of a magnet housed in a receptacle formed by the stamping relief, and of a magnetic flux guide associated with the magnet, can come in contact with a terminal of a battery element in the connection plane, extend respectively through one of the openings of the electrical insulator.
    In this embodiment, the connection plane and the plane of the electrical conductive tape forming the interconnection device are offset by a distance equal to or slightly greater than the thickness of the electrical insulator. Thus, only the raised contact areas reach the terminals of battery cells, without risk of short circuit, including during accidental deformation of the conductive tape of the connection device.
    The insulator may include a plate of electrical insulating material, the plate of electrical insulating material extending between the strip plane and the connection plane. It can in particular be presented, in the form of a plate of n
    plastic material, the openings of which are adapted to the shapes and dimensions of the reliefs ·,> "sealing of the contact zones or of the magnetic flux guides with which your horn zones are provided"
    In a particular configuration of the battery, having a p, <R. "R connection plane and a second connection plane, the second connection plane being opposite to the first connection plane and substantially parallel to the first connection plane, each element battery can present, as mentioned above, a first terminal located in the first connection plane and a second terminal located in the second connection plane. In this case, at least one electrical interconnection device can be associated with each of the first connection plane and of the second connection plane, each interconnection device interconnecting terminals of several battery cells located in the first plane connection, respectively in the second connection plane.
    Other characteristics and advantages of the invention appear from the description which follows, with reference to the figures of the drawings. This description is given purely by way of illustration and without limitation.
    Brive description of the figures
    Figure 1 "is a very simplified illustration of a part of an electric battery conforming to ntion and using an interconnection device according to the invention.
    Figure 2 is a section of part of an interconnection device according to the invention.
    Figure 3 is a schematic section of part of an interconnection device conformp n i'invontion and constituting an alternative embodiment.
    Figure 4 is a schematic section of a part of an interconnection device according to the invention and constituting another variant © of embodiment.
    i s μη a sectic.h d ~ "ν", ν14β schematic of part of an interconnection device according to the invention and constituting yet another alternative embodiment.
    ta tlgure 6 is perspective of an interconnection device œntome to! invention.
    FIG. 7 is an exploded view showing an electric battery in accordance with the invention and using interconnection devices "to a wu" of FIG. 6,
    The drawings of the figures so >, NyA * t ‘· i libre.
    Detailed description of methods of implementing the invention,
    In the following description, identical or similar parts of the different figures bear the same references to facilitate the transfer from one figure to another.
    FIG. 1 shows an accumulator battery 10 comprising two battery cells 12. They are, for example, Lithium-Ion battery cells in standard 18650 format. The battery cells are in the form of cylinders, the ends of which are respectively form a positive terminal 14+ and a negative terminal 14-, the battery cells 12 are juxtaposed and the positive and negative terminals 14+ and 14- of each battery cell are arranged respectively in a first and a second connection plane 1 Fh 16b.
    The two battery cells of FIG. 1 are oriented head to tail so that in each connection plane there is a terminal for battery cells and a negative terminal for the other battery cell. Such an arrangement of the battery cells is particularly suitable for placing them in series.
    FIG. 1 also shows an interconnection device 20 extending in the first connection plane 16a and connecting together the positive and negative terminals 14+ and 14- of the two battery cells 12.
    The interconnection device comprises an electrically conductive strip 22 provided with two contact zones 30. The contact zones are in electrical contact with the posith tiw terminals 14+ and 14- of the battery cells in the first connection plane 16a.
    It can be noted that each contact zone is provided with a permanent magnet, which has a mechanical contact with the corresponding contact zone with a terminal of a battery element. The magnet 32 exerts magnetic forces. of attraction on your terminals 14+, 14-, generally comprising a material attracted by the magnet, to ensure maintenance of the electrical contact between the terminal of the element and the associated contact area.
    The section of ® Figure 2 shows a possibility ovation of a zone of conta »30 interconnection device 20. This section is performed here at the positive terminal 14+ of a battery element 12, in a longitudinal plane of the element comprising, ”, nant 32. The section would however be similar at the level of the terminal 14- of the element 12. In b contact zone 30, the electrical conductive tape 22 has a drawing relief 34. The relief stamping here forms a bowl 42 and constitutes a receptacle for the magnet 32. The stamping relief is formed by stamping or stamping a sheet of copper forming the conductive tape 22.
    In the example of FIG. 2, (the magnet has a cylindrical shape, and the bowl 42 of the stamping relief 34 has a sufficient depth to receive the magnet 32 entirely there.
    The electrical contact with the terminal 14+ of the battery element 12, partially shown, is fat pa "" ..ne part of the contact zone 30 corresponding to the bottom of your bowl forming the stamping relief 34. This part of the contact zone constitutes an electrical contact surface.
    The magnet 32 is held in its housing by a crimping frame 36 in the form of a mild steel ring. More specifically, the ring constitutes, in the illustrated embodiment, both the crimping armature and a magnetic flux guide. The mild steel ring makes it possible to press the side walls of the housing formed by the stamping relief 34 against the magnet 32. It also makes it possible to orient the magnetic flux lines of the magnet from a face opposite to the battery cell to the battery cell.
    Advantageously, the crimping armature, which forms a magnetic flux guide, is shaped 32 and surrounds the magnet.
    When the crimping frame 36 does not have a hhqnetic flow guide function, it can also be made of plastic or aluminum.
    i crimping rtire 36 can also be made of a magnetic material and itself constitute a magnet which participates in the action of the magnet 32 housed in the relief of stamping
    It can also be noted that the battery element 12 comprises an insulating sheath 13 of small thickness, sleeps the role is of evo all r jurts-circuits between the positive pole and the container of the battery element generally constituting the negative pole .
    In the case of FIG. 2, the contact zone 30, corresponding to the bottom of the bowl formed by the stamping relief 34, The contact zone extends along b first connection plane 16a. It can be noted that an edge of the crimping frame 36 adjacent to the connection plane 16a is flush with the connection plane.
    Thus, when the crimp annatyre serves as a magnetic flux guide, an air gap between the magnetic flux guide and (at terminal 14+ of the battery element may be zero when the contact zone 30 is applied against terminal 14+ It reduces the air gap of the magnet which is located at a distance from the terminal 14+, being separated from this terminal by the conductive tape 22, and thus improves the contact force between the magnet 32 and your volume 14+. , and therefore the contact between the connector tape 22 and the terminal 14+ in the connection plane 16a.
    In the example, the electrical conductive tape 22 is a copper tape, for example of copper C11000, with a thickness of 0.1 mm, coated with a silver layer with a thickness of 2 micrometers. The magnet is a nickel-plated NdFeB type magnet which is housed in a bowl 42 with a diameter of 5 mm and a depth of 2 mm. The crimping frame is made of nickel-plated S235 steel with an outside diameter of 6.2 mm and a thickness of mm.
    These values are not limiting.
    An embodiment of the contact zone according to FIG. 2, is adapted in particular to bringing a planar contact surface of the contact zone into contact with a half-mast of a building element h »ta) Planar smoke.
    The area of electrical contact surface between your contact zone of the interconnection device and your battery terminal may however be limited when the surface of the terminal 14+, 14- of the battery element 12 has a slightly convex borrowing shape. Contact may indeed be limited to a point of tangency of the connection plane 16a, 18b, with the apex of your terminal 14+, 14- of the battery element 12.
    To increase the surface area of con ”Η, ta“ rsi further reduce the electrical resistance of conta.cL including p <o ”<r des v <“ use terminals which are not perfectly flat, an embodiment of your contact area according to Figure 3 is proposed. Figure 3 is shown here schematically.
    »D 130 of your figure 3 is sîmïlab i m fo vn " f ure 1, except that i""a<n" u "intact surrounds an openwork 38 made at the bottom of your bowl 42 of the stamping relief 34. The openwork 38 is preferably a circular hole, preferably centered at the bottom of the bowl 42, made by punching and concomitantly with the production of the stamping relief.
    The presence of the perforation allows an annular distribution of the contact surface in the contact zone 30, including when the terminal 14+, 14- of the battery element is slightly curved.
    FIG. 4, also shown schematically, shows yet another possibility of producing a contact zone 30 according to the invention. The electrical conductive tape of the interconnection device has a stamping relief 34 in the form of a small sleeve 44 defining a circular housing for receiving the magnet 3 sleeve 44 is formed in a single piece 3c the conductive tape electric 22. H stands perpendicular to the connection plane 16a, 16b, opposite fa zeta wt 30, that is to say on a face of the electrical conductive tape 22 opposite to the face of the tape coming into contact with a terminal 14+, 14- of the battery element 12.
    The crimping of the magnet 32 takes place by means of a crimping reinforcement 38 in the form of a soft iron ring which: goes around the sleeve 44 and which comes to tighten the sleeve on the magnet 32. The ring of soft iron, as for the exemplary embodiments of the preceding figures, also serves as a magnetic flux guide.
    iact between the interconnection device 20 and a terminal 14+, 14- of the battery element 12 is made by an annular contact surface of the contact zone 30 which surrounds the magnet.
    It can be noted in FIG. 4 that the magnet 32 is flush with the connection plane 16a, 16b defined by the contact surface of the contact zone 30. This characteristic is particularly advantageous insofar as an air gap is to say a spacing in nant and the contact terminal of the battery element can be tr H there results an improved efficiency of the magnet and a greater force action applying the contact zone 30 against the battery element.
    For comparison, the air gap between the magnet 32 and a terminal 14+, 14- of the battery element 12, in your embodiments of the figures * 'λϊ' Ayil at the thickness of the electrical conductive tape 22 .
    The embodiment of FIG. 4 makes it possible to position the magnet 32 either flush with a connection plane 16a, 18b of the contact zone 30 or in very slight withdrawal from the connection plane. A zero air gap or a thickness less than 0.1mm can be obtained.
    Figure 5, also shown schematically, shows yet another possibility u ta · << λ On of a contact zone 30. It constitutes a simple variant of that of FIG. 4.
    mboutissage 34 of the contact zone of figure 5 is identical to Λ »ί η <i ntact of figure 4. Unlike figure 4, however, the crimping frame 36 is not ur but a pot or a crimping capsule which comes to cap ('magnet 32. In the example described, it is a soft iron capsule.
    The realization of an Armais. The mm ump to me of a capsule or a jar allows better magnetic fluxes from the magnet to the battery element when the mature crimping 36 is used as a magnetic flux guide. Furthermore, given a height of the sleeve 44 less than that of the magnet, the use (i'u '"* 1 type of crimping in the form of a capsule of determined depth, makes it possible to adjust finely your position of the magnet 32 relative to the connection plane 16a, 16b, during crimping.
    In the example of flgw> '.rnH n> a Zbeurant the connection plane 1 b.
    Figure 6 shows an interconnection device 20 according to the invention and provided for a plurality of battery cells. The device of FIG. 6 comprises an electrically conductive strip 22 in the form of an elongated central strip 50 extending along a main axis 52 and provided with a plurality of appendages CA The appendages 54 extending radially from on either side of the central strip 50, and perpendicular to the main axis 52. Each appendix 54 is provided at the end with a contact zone 30 provided with a magnet 32. The configuration of the contact zones corresponds, for example n tet ! gures 2 or 3.
    FIG. 7 shows, in the form of an exploded view, a storage battery according to the invention, comprising a plurality of interconnection devices 20. The storage battery 10 of FIG. 7 also comprises a plurality of battery cells 12 arranged here in a regular matrix of 10 rows and 12 columns. The individual battery cells 12 have a cylindrical shape and have terminals 14+, 14- at their ends. The terminals of the opposite ends of the elements of be smooth two connection planes 16a, 16b,
    In the same line, the battery cells 12 are alternately mounted with their positive terminal 14+ in the first connection plane 10a, respectively in the i / th connection plane 16b, then with their negative terminal 14- in the first connection plane 16a, respectively in the second connection plane 16b. In other words in the same line, your successive battery cells are two by two mounted head to tail. On the other hand, all the bi one and the same column have a terminal of the same polarity in the first connection plane 16a, respectively in the second connection plane 16b.
    Interconnection devices 20 are provided for interconnecting terminals s 14 + .14- of battery cells 12 in each connection plane 16a, 161 devices, compare FIG. 6, have main axes 52 which are aligned with the columns d 'battery cells.
    The contact zones 30 of the interconnection devices 20 have here openings 38 identical to those of FIG. 3, so as to promote an annular contact.
    Each interconnection device 20 is provided for connecting the battery cells of the same column in parallel and for connecting the battery cells of two consecutive columns in series. By way of illustrative example, the same interconnection device 20 connects all the positive terminals 14+ of the battery elements Rftee cotton battery elements and interconnects all the negative terminals 14- of the battery elements of the adjacent column. The device also connects the positive terminals-1 of the battery cells of a column, to the negative terminals 14- of the adjacent ton cells.
    Special interconnection devices 20 are mounted on your end columns 1 © H 2 constitute the terminal interconnection devices of the battery which will then be connected to the positive and negative terminals of the battery.
    The interconnection devices include electrically conductive strips 22 extending along ribbon planes "not referenced, and parallel to the connection planes 16a, 16b.
    Between the ribbon planes and the connection planes 16a, 16b are insulators 60a, 60b respectively. The Insulators are in the form of plates of an insulating material, for example plastic, They are pierced with a plurality of openings 62 in the form of transverse holes and dimensioned to receive the relief of stamping of the zones of contact 30 of the interconnection device, as well as the magnet and the armature of "o>, <f oo t respectively to the contact zones.
    Thus each contact area 30 of each interconnection device is associated with an openwork 62 of an insulator 80a, 60b. When the beater is assembled, the contact zones 30 extend through the openings 62 to reach your terminals 14 +, 14- of the elements 12 in the contact planes
    16a, 16b. The Insulators 60a and 60b also have a mechanical function of support and relative maintenance of the elements with respect to each other, and with respect to the interconnection devices.
    The isolators bOa, 60b - from L »» h. tM'W '5' ( 13 of the battery cells 12, visibta te *. Ujvres 2 to 5, make it possible to avoid unwanted contacting of an electrical conductive tape 22 of an interconnection device 20 with the two terminals of the same Indeed, a number of known battery cells have a negative bo in the form of an outer metal casing which extends from one end of the cylindrical body of the battery cell to the the op end includes the positive terminal of the same battery element, so that the two terminals of such a battery element can coexist in the same connection plane.
    All of the elements 12 of the battery 10 in FIG. 7 can be housed in a bat casing " >><Iup nté. The cari v} f H .'t be designed in a light way insofar as it does not have to contain supporting forces from the battery interconnection devices. The interconnection devices 20 are held in place by the magnetic fs that the magnets 32 of the contact zones 30 exert on the battery elements 12.
    During vibrations or shocks, the interconnection devices easily allow relative movements of the elements of the battery relative to one another but also relative sliding movements between the contact zones and the terminals of the battery elements, while many activities between contact areas and terminals. There is thus no risk of fatigue at the level of the contact and therefore no risk of contact breakage when the battery is used.
    l · 1 ι ' 1 ** »/ 4 Wterie thus contribute to maintaining the cohesion of the battery.
    权利要求:
    Claims (18)
    [1" id="c-fr-0001]
    Claims
    1) interconnection device (20) for battery cells (12) comprising at least one electrically conductive strip (22) with at least one contact zone (30) for battery cell, and at least one magnet (32) , permanent, associated with the contact zone (30) and configured for the application of (a contact zone (30) on a terminal (14, 14+, 14-) of a battery element (12) by magnetic interaction with the battery element, characterized in that;
    the contact zone (30) of the ribbon has a stamping relief (34) of the ribbon, the stamping relief (34) forming a magnet receptacle,
    - The magnet (32) is housed in said magnet receptacle.
    [2" id="c-fr-0002]
    2) Device according to claim 1, in which the contact zone (22) has an openwork (38),
    [3" id="c-fr-0003]
    3) Device according to any one of the preceding claims, comprising a crimping armature (36) of the magnet (32) on the stamping relief (34).
    [4" id="c-fr-0004]
    4) Device according to claim 3, wherein the crimping frame (36) constitutes a magnetic flux guide.
    [5" id="c-fr-0005]
    5) Device according to claim 4, wherein the permanent magnet has a cylindrical shape, and wherein the crimping frame (36) forms a ring coaxial with the permanent magnet and surrounding the permanent magnet.
    [6" id="c-fr-0006]
    6) Device according to claim 4, wherein the crimping armature (36) forms a capsule covering one of the permanent magnet poles.
    [7" id="c-fr-0007]
    7) Device according to any one of claims 4 to 6, wherein the contact zone (30) extends substantially along a connection plane (16,16a, 16b) and wherein at least one of the permanent magnet and the magnetic flux guide is flush with the connection plane (16,16a, 16b).
    [8" id="c-fr-0008]
    8) Device according to any one of claims 4 to 7, wherein the magnetic flux guide < one of a soft iron guide and a magnetic guide.
    [9" id="c-fr-0009]
    9) Device according to one of the preceding claims, in the electrically conductive ban (22) comprises a copper tape.
    [10" id="c-fr-0010]
    10) Device according to claim 9, wherein the electrical conductive tape (22) has a pl
    [11" id="c-fr-0011]
    11) Dispositi "'‘ β on te> do any of the preceding claims, wherein the electrical conductive tape (22} has a thickness between 50 and 200 micrometers.
    [12" id="c-fr-0012]
    12) Device according to any one of the preceding claims, wherein the electrically conductive tape (22) has the shape of an elongated strip (50) with a plurality of transverse and substantially coplanar appendages (54), each appendix being b contact (30).
    [13" id="c-fr-0013]
    13) Electric storage battery comprising a plurality of battery cells (12} having connection terminals (14,14 +, 14-) and at least one interconnection device (20) connecting terminals between them battery cells, the interconnection device (20) being in accordance with any one of the preceding claims.
    [14" id="c-fr-0014]
    14) electric storage battery according to claim 13, having at least one connection plane (18,16a, 16b) and in which;
    - each battery element (12) has a terminal (14,14+, 14-} located in Je po’s "te ^" "ïiexiori er,
    - The electrical interconnection device connects, between them, terminals of several battery cells, located in said connection plane.
    [15" id="c-fr-0015]
    15) Accumulator battery according to claim 14, wherein the battery elements (12) are cylindrical elements extending perpendicular to the connection plane (16,16a, 16b).
    [16" id="c-fr-0016]
    16) Accumulator battery according to any one of claims 14 or 15, comprising at least one electrical insulator (60a, 60b) having openings (62) associated with terminals (14+, 14-) of the battery elements ( 12), and in which:
    - the electrical interconnection device (20) has an electrically conductive tape extending essentially along a plane of tape, the tape plane being substantially parallel to the connection plane (16a, 16b),
    the interconnection device has a plurality of contact zones (30) projecting from the ribbon plane in the direction of the connection plane (16a, 16b),
    - For each contact area, at least one of the stamping relief (34), a magnet (32) housed in a receptacle formed by the stamping relief, and a magnetic flux guide associated with the permanent magnet, comes into contact with a terminal (14 +, 14-) of a battery element (12) in the connection plane, extends respectively through an aperture (62) of the electrical insulator .
    [17" id="c-fr-0017]
    17) Accumulator battery according to claim 16, wherein the insulator (60a, 60b) comprises a plate of electrical insulating material, the plate of electrical insulating material extending between the plane of the tape and the connection plane.
    [18" id="c-fr-0018]
    18) Accumulator battery according to any one of claims 14 to 17, having a first connection plane (16a) and a second connection plane (16b), the second connection plane being opposite to the first connection plane and substantially parallel to the first connection plane, in which each battery element (12) has a first terminal (14 +, 14-) located in the first connection plane (16a) and a second terminal located (14-, 14 +) in the second connection plane (16b), and comprising at least one the interconnection device (20) associated with each of the first connection plane and of the second connection plane, each interconnection device interconnecting terminals of several battery cells located in the first connection plane, respectively in the second connection plane.
    1/4
    16b
    FTG 1
    A JL WJ * s JL
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    同族专利:
    公开号 | 公开日
    CN109792024A|2019-05-21|
    EP3513446A1|2019-07-24|
    US20190198843A1|2019-06-27|
    JP2019530193A|2019-10-17|
    FR3056022B1|2019-10-11|
    KR20190049835A|2019-05-09|
    WO2018050978A1|2018-03-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2920913A1|2007-09-06|2009-03-13|Pellenc Sa|BATTERY CONSISTING OF A PLURALITY OF CELLS POSITIONED AND CONNECTED BETWEEN THEM, WITHOUT WELDING.|
    US20110223776A1|2010-03-15|2011-09-15|Electronvault, Inc.|Modular Interconnection System|
    WO2003090321A1|2002-04-20|2003-10-30|Magtrix Connectors Limited|Electrical connectors|
    US10461306B2|2005-06-30|2019-10-29|Koninklijke Philips N.V.|Battery and method of attaching same to a garment|
    KR100760751B1|2005-12-23|2007-09-21|삼성에스디아이 주식회사|Secondary battery|
    JP5466906B2|2009-09-18|2014-04-09|パナソニック株式会社|Battery module|
    FR3021809B1|2014-06-03|2016-06-24|Commissariat Energie Atomique|CONNECTING DEVICE FOR BATTERY|
    US9147875B1|2014-09-10|2015-09-29|Cellink Corporation|Interconnect for battery packs|
    CN205355136U|2015-12-19|2016-06-29|浙江天能能源科技有限公司|A positioner for spot welding nickel strap|FR3085796B1|2018-09-12|2021-02-12|Commissariat Energie Atomique|MAGNETIC CONNECTION / DISCONNECTION DEVICE BETWEEN AN ELECTROCHEMICAL ACCUMULATOR AND BUSBARS, AND PASSIVE MAGNETIC SHUNT OF THE ACCUMULATOR AFTER ITS FALL BY GRAVITY|
    FR3085793B1|2018-09-12|2020-10-09|Commissariat Energie Atomique|METHOD OF ASSEMBLY OF A BATTERY PACK OF ELECTROCHEMICAL ACCUMULATORS TO BUSBARS BY MAGNETIC LOCKING|
    FR3085798B1|2018-09-12|2021-04-23|Commissariat Energie Atomique|INTERFACE ADAPTER INTEGRATING AT LEAST ONE MAGNETIC LOCK FOR MAGNETIC FIXING WITH ELECTRICAL CONDUCTION FROM AN ELECTROCHEMICAL ACCUMULATOR TO A BUSBAR|
    FR3085797B1|2018-09-12|2021-04-23|Commissariat Energie Atomique|OUTPUT TERMINAL OF AN ELECTROCHEMICAL ACCUMULATOR INTEGRATING A MAGNETIC LOCK FOR MAGNETIC FIXING WITH ELECTRIC CONDUCTION WITH A BUSBAR|
    CN111326700A|2019-12-26|2020-06-23|湖北锂诺新能源科技有限公司|Electric connection structure between module electric cores|
    法律状态:
    2017-09-25| PLFP| Fee payment|Year of fee payment: 2 |
    2018-03-16| PLSC| Search report ready|Effective date: 20180316 |
    2018-09-25| PLFP| Fee payment|Year of fee payment: 3 |
    2019-09-25| PLFP| Fee payment|Year of fee payment: 4 |
    2020-09-25| PLFP| Fee payment|Year of fee payment: 5 |
    2021-09-27| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1658489|2016-09-13|
    FR1658489A|FR3056022B1|2016-09-13|2016-09-13|DEVICE FOR ELECTRICALLY INTERCONNECTING BATTERY ELEMENTS AND BATTERY OF BATTERIES PROVIDED WITH SUCH A DEVICE|FR1658489A| FR3056022B1|2016-09-13|2016-09-13|DEVICE FOR ELECTRICALLY INTERCONNECTING BATTERY ELEMENTS AND BATTERY OF BATTERIES PROVIDED WITH SUCH A DEVICE|
    US16/317,687| US20190198843A1|2016-09-13|2017-08-28|Device for electrically interconnecting battery elements, and battery of accumulators provided with such a device|
    EP17771799.8A| EP3513446A1|2016-09-13|2017-08-28|Device for electrically interconnecting battery elements, and battery of accumulators provided with such a device|
    JP2019535983A| JP2019530193A|2016-09-13|2017-08-28|Device for the electrical interconnection of battery elements and a storage battery comprising such a device|
    CN201780055987.9A| CN109792024A|2016-09-13|2017-08-28|Device for cell device to be electrically interconnected and the battery with this device|
    KR1020197010391A| KR20190049835A|2016-09-13|2017-08-28|Apparatus for interconnecting battery elements and battery with such apparatus|
    PCT/FR2017/052287| WO2018050978A1|2016-09-13|2017-08-28|Device for electrically interconnecting battery elements, and battery of accumulators provided with such a device|
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