• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention solves the problem of swelling hermetic electrochemical elements of prismatic format when they are assembled side by side in a grouping box, by proposing a battery comprising at least two electrochemical elements (la, lb) of prismatic format, in which the electrochemical elements are separated by a rigid shim (2) having a hardness greater than or equal to 90 Shore A according to ASTM D 2240 and a flexible shim (3) having a hardness of up to 60 Shore A according to the ASTM D 2240 standard, the rigid wedge and the flexible wedge being electrically insulating.
    公开号:FR3048129A1
    申请号:FR1651299
    申请日:2016-02-18
    公开日:2017-08-25
    发明作者:Alexandre Narbonne；Marc Chesnais；Jerome Calmejane
    申请人:SAFT Societe des Accumulateurs Fixes et de Traction SA；
    IPC主号:
    专利说明:

    SYSTEM FOR COMPENSATING FOR THE SWAPPING OF ELECTROCHEMICAL ELEMENTS
    TECHNICAL FIELD The invention relates to the technical field of systems for compensating the swelling of electrochemical elements constituting a battery.
    STATE OF THE ART
    A battery of electrochemical elements comprises a plurality of electrochemical elements, further referred to hereinafter as "element (s)", which are assembled side by side in a common grouping box. This box is intended to hold the elements in a fixed position during transport or use of the battery.
    During the charging of a hermetic element of the lithium-ion type, the container of the element is swollen. In the case of an element of parallelepipedal format (synonymous with prismatic format), the swelling occurs essentially on the two opposite planar sides opposite the largest of the container. This swelling amplifies as the state of charge of the element approaches the fully charged state. As the elements are placed one behind the other in the grouping box and each element undergoes an increase in its thickness, there is a significant increase in the total length of the battery resulting from the sum of the increases in the thicknesses of the elements. However, as the grouping box is generally made of a rigid material and the free space between the elements and the walls of the box is limited, the swelling of the elements submits the walls of the box to pressure forces that can lead to its irreversible deformation, even to its damage. Therefore, we seek a device that prevents the chest from being deformed under the effect of swelling elements during their charge.
    To remedy this problem, it is known to insert between two faces of two elements a spring or a deformable part. During the load, the increase in volume of the elements is compensated by the reduction of the length of the spring or the reduction of the thickness of the deformable part. Mention may be made, as an example of deformable part material, of silicone or polyurethane or polyvinyl chloride foams marketed by the Saint-Gobain Company under the NORSEAL® trademark. However, this solution is not completely satisfactory because the use of a foam gives the assembly of elements insufficient rigidity. In addition, the variation in the length of the assembly of the elements is sometimes not completely eliminated. Finally, the compression force generated by the elements is not controlled. The use of a metal spring between two elements is also not a satisfactory solution because it can lead to a short circuit, the container of the elements being generally metallic. In addition, the spring metal having good thermal conductivity, it quickly spreads any increase in temperature of an element to the neighboring element.
    Documents describe systems for compensating the swelling of the elements of a battery. For example, CN 201038203 discloses a lithium-ion sealed prismatic element placed in a rigid envelope. Ribs have been arranged on two opposite sides of this envelope. It is said that the presence of these ribs reduces the swelling of the element, and therefore the risk of explosion.
    JP 2014107217 discloses an element of generally prismatic format, in which two opposite lateral faces of the container of the element have a bulge. This bulge is located near the center of each face. It is intended during the manufacture of the container in order to increase the available volume for the electrochemical beam. A resin shim is placed between two adjacent electrochemical elements. This wedge has the particularity of having a variable thickness. The portion of the wedge in contact with the crown has a thickness less than that at the ends of the wedge in contact with the periphery of a face of the element. Thanks to this wedge of variable thickness, it is possible to maintain a good contact between the wedge and the element. However, the solution described in this document applies to an element container having the shape of an oval parallelepiped. However, this element format is not common.
    There remains therefore a need to provide a system that prevents a variation of the dimensions of the grouping box when it contains one or more hermetic electrochemical elements.
    SUMMARY OF THE INVENTION For this purpose, the invention proposes a battery comprising at least two electrochemical elements of prismatic format, in which the electrochemical elements are separated by a rigid shim having a hardness greater than or equal to 90 Shore A according to the ASTM standard. D 2240 and a flexible wedge having a hardness of up to 60 Shore A according to ASTM D 2240, the rigid wedge and the flexible wedge being electrically insulating.
    The rigid wedge and / or the flexible wedge may consist of either an electrical insulating material or a first electrically conductive material covered with a second electrical insulating material. According to a preferred embodiment, the flexible wedge is made of plastic or consists of a metal spring covered with an insulating material, such as a plastic material.
    According to a preferred embodiment, the flexible wedge comprises a material whose thermal conductivity is less than or equal to 0.5 W / (m · K), preferably ranging from 0.02 to 0.2 W / (m · K).
    According to a preferred embodiment, the flexible wedge comprises several portions of different hardnesses. A first portion in contact with the vicinity of the center of a wall of the electrochemical element may have a hardness less than that of a second portion in contact with the vicinity of the periphery of this wall of the electrochemical element.
    According to a preferred embodiment, the rigid wedge has a vertical portion and a horizontal portion, the vertical portion being disposed against a vertical wall of an electrochemical element and the horizontal portion being disposed against a horizontal wall of this electrochemical element. The horizontal portion of the rigid shim may comprise at least one orifice through which a current output terminal of the electrochemical element is inserted.
    The battery can include as many rigid shims as electrochemical elements, the rigid shims forming a single piece.
    According to one embodiment, the battery comprises as many rigid shims as electrochemical elements, the rigid shims, being distinct from each other.
    According to one embodiment, the rigid shims have the shape of a rectangular frame.
    According to one embodiment, the battery comprises as many rigid shims as electrochemical elements, each shim being formed of at least two distinct subcomponents. The two distinct sub-components may each be in the form of a "T", one being disposed in the vicinity of the upper part of the electrochemical element, the other being disposed in the vicinity of the lower part of the electrochemical element.
    According to one embodiment, a rigid shim comprises at least three distinct subcomponents, each subcomponent having for example a circular shape.
    According to one embodiment, the battery comprises a single flexible shim common to all the electrochemical elements.
    According to one embodiment, the battery comprises as many flexible shims as electrochemical elements, the flexible shims being distinct from each other.
    The electrochemical elements may be lithium-ion type. The subject of the invention is also a method of assembling a battery comprising at least two electrochemical cells, said method comprising the steps of: a) providing a first electrochemical element of prismatic format, b) setting up a rigid block having a hardness greater than or equal to 90 Shore A according to ASTM D 2240 and a flexible shim having a hardness of up to 60 Shore A according to ASTM D 2240, against one of the faces of the first electrochemical element, c) joining of a second electrochemical element of prismatic format against the rigid wedge and the flexible wedge.
    According to one embodiment, before step c) of joining the second electrochemical element, the flexible wedge has a thickness greater than that of the rigid wedge, and during step c) of joining the second electrochemical element , the thickness of the flexible wedge is reduced under the compression exerted by the second electrochemical element.
    DESCRIPTION OF THE FIGURES
    Figure la shows a view of a prismatic element, a rigid shim and a flexible wedge before assembly.
    Figure lb shows a view of a prismatic element assembled with a rigid shim and a flexible shim.
    Figure 2a shows a longitudinal sectional view, during the assembly step, of two electrochemical elements between which have been inserted a flexible shim and a rigid shim.
    Figure 2b shows a sectional view of an assembly comprising two electrochemical elements between which have been inserted a flexible shim and a rigid shim. It illustrates the deformations that occur on the electrochemical elements and on the flexible wedge for different states of charge of the element.
    Figures 3a to 3d show different shapes and arrangements of rigid holds.
    Figures 4a and 4b show different shapes and arrangements of soft wedges.
    Figure 5 shows different possibilities of combination between the embodiments of a rigid shim and those of a flexible shim.
    DESCRIPTION OF EMBODIMENTS The invention proposes to insert during assembly of two prismatic elements, a rigid shim and a flexible wedge between these elements, these two shims being electrically insulating.
    The rigid wedge has the function of keeping the distance between two adjacent elements constant. She plays the role of a spacer. Rigid shim means a shim made of a material whose hardness is greater than or equal to 90 Shore A measured according to ASTM D 2240. It may consist of a thermoplastic, thermosetting material, an elastomer, a composite, a ceramic, a metal whose surface is coated with a varnish or whose surface has undergone a treatment rendering it electrically insulating.
    The purpose of the flexible wedge is to absorb the increase in the thickness of the element to which it is associated during the load of the element. By soft shim means a shim made of a material having a hardness up to 60 Shore A measured according to ASTM D 2240. A material capable of exerting a pressure ranging from 0.2 to 5 daN / cm 2 ( 20 to 500 kPa) is also suitable for making the soft wedge. A material having a hardness of from 0.25 to 1 daN / cm 2 (25 to 100 kPa) is preferably chosen for a deformation of 20% of its thickness.
    The preferred material for the soft wedge is a plastic material. Thermoplastic and thermosetting foams and elastomers may be mentioned. Examples of commercially available materials are the ProtectION + ™ SF50 and SF70 cellular silicone foams marketed by Saint-Gobain, the Korel® K20 cellular polyurethane foam marketed by Saint-Gobain or the ethylene-monomer cell rubber. propylene diene (EPDM) Celgummi 1722 marketed by National Gummi. It is also possible to use a plastic spring or a metal spring covered with a layer of thermally insulating material in place of a foam.
    Preferably, a material having a thermal conductivity of less than 0.5 W / (m · K) is preferred, preferably 0.02 to 0.2 W / (m · K). This thermally isolates the element on which the shim is installed and to prevent the heat generated by an abnormally functioning element from spreading to neighboring elements.
    Figure la shows a prismatic element (1), a rigid shim (2) and a flexible shim (3) before assembly. The rigid wedge (2) comprises a vertical portion (4) and a horizontal portion (5). The vertical part (4) is pressed against a vertical wall (6) of the prismatic element and the horizontal part (5) rests on a horizontal wall (7) of this element. The vertical part (4) has the shape of a rectangular frame whose height and width are substantially identical to those of the element to which the rigid block is associated. The flexible wedge (3) is housed in the space in the rectangular frame. Preferably, the flexible wedge occupies all the space inside the frame.
    The horizontal portion (5) of the rigid shim (2) may comprise at least one orifice (8, 9) through which is inserted a current output terminal (10, 11) of the element. This orifice prevents the displacement of the rigid block (2) on the element (1). Preferably, the horizontal portion has two orifices, one (8) for receiving the negative current output terminal (10), the other (9) for receiving the negative current output terminal (11). The two orifices may have different sections, which makes it possible to differentiate the location of the positive terminal from that of the negative terminal. The horizontal portion (5) may further include an orifice (12) coincident with the location of the electrolyte fill port or with the location of a safety valve (13). Figure lb shows a view of a prismatic element (1) assembled with a rigid wedge (2) and a flexible wedge (3). The current output terminals (10, 11) pass through the orifices (8, 9). It should be noted that the invention is not limited to the method of fixing the rigid shim described in FIGS. 1a and 1b. The rigid wedge could be attached in another way to the element. The rigid wedge can simply be pressed against the vertical wall (6) of the element without including horizontal part (5). Figure 3b shows three rigid frames devoid of horizontal part.
    In a preferred embodiment, the thickness of the element is substantially constant over its entire height. Similarly, the thickness of the rigid shim and the thickness of the flexible shim are substantially constant over their entire height.
    Figure 2a shows a longitudinal sectional view of two elements (la, lb) between which have been inserted a rigid shim (2) and a flexible wedge (3). The thickness of the flexible wedge is generally greater than that of the rigid wedge so that during assembly of the second element (Ib) on the first element (1a), the second element (Ib) is joined against the rigid shim (2) causes compression of the flexible shim (3). During assembly, the flexible wedge (3) submits the electrochemical elements (1a, 1b) to a compressive force. This compression force is exerted because of the difference (Δε) between the thickness of the rigid shim and that of the flexible shim, even in the absence of swelling of the elements. The compressive force in the absence of swelling of the elements is hereinafter referred to as "precompression". For a given hardness of the soft wedge material, it is possible to vary this precompression. Plus, the difference Δε between the thickness of the rigid shim and that of the wedge is important, the more precompression is too. It is also possible for a given thickness difference between the soft wedge and the rigid wedge, to increase the precompression by increasing the hardness of the soft wedge material. Those skilled in the art can therefore vary the precompression of the elements by varying either the difference in thickness between the flexible wedge and the rigid wedge, or the nature of the material of the flexible wedge. The existence of a precompression makes it possible to avoid a deformation of the electrodes of the electrochemical beam of the element. A soft wedge material of hardness greater than about 90 Shore A would not deform sufficiently, which could lead to a significant increase in the internal pressure of the element. Preferably, the soft wedge material has a hardness greater than 30 Shore 00 according to ASTM D2240. The slight swelling visible on both faces facing each other of the two elements (la, lb) is explained by the fact that the elements are assembled while they are partially loaded. The state of charge value of 30% (SOC: 30%) is given in FIG. 2a as an indication for prismatic elements of the lithium-ion type.
    Figure 2b illustrates the deformations that occur on the elements (la, lb) and on the flexible wedge (3) during a load of these elements. The diagram on the left shows that in the unloaded state (SOC = 0%), the elements (1a, 1b) do not show any swelling. The soft wedge is nevertheless precompressed. During the charging of the elements, swelling appears on the side walls of the elements. It takes amplitude and is absorbed by the reduction of the thickness of the flexible wedge as shown by the diagrams corresponding to the state of charge of 30 and 100%. The flexible wedge exerts increasing pressure on the wall of the element as it swells. The material of the flexible wedge may, for example, exert: a pressure of between 0.2 and 1 daN / cm 2 for a fully discharged element; a pressure of between 1 and 2 daN / cm 2 for a 30% charged element; a pressure of between 2 and 5 daN / cm 2 for a 100% charged element;
    The rigid block (2) is not deformed during the load and maintains a constant spacing between the peripheral zones of the two elements (la, lb). Therefore, the total length of the elements placed in the grouping box is kept constant.
    The rigid wedge can take different forms and be arranged in different ways.
    In a first variant shown in Figure 3a, a single piece forms the rigid wedges. This part consists of several parallel partitions (2a, 2b, 2c) made integral with each other through two vertical plates (11a, 11b) fixed perpendicularly to each partition. This single piece can receive two elements (not shown in Figure 3a).
    In a second variant shown in FIG. 3b, the rigid shims have a frame shape. Each element is associated with a rigid wedge.
    In a third variant, each rigid shim is formed of several subcomponents, for example 2, 3 or 4 subcomponents.
    As represented in FIG. 3c, the rigid wedge may consist of two subcomponents (2a1, 2a2, 2b1, 2b2, 2c1, 2c2), each subcomponent having for example the shape of a "T". A first subcomponent (2a 1, 2bl, 2cl) is disposed near the top of the element. A second subcomponent (2a2, 2b2, 2c2) is disposed near the bottom of the element. The thickness of the vertical part of the "T" shape fixes the spacing between two elements.
    As shown in FIG. 3d, the rigid wedge can also consist of four subcomponents (2d1, 2d2, 2d3, 2d4), each subcomponent being in the form of a stud. The thickness of the stud determines the distance between two neighboring elements. The four subcomponents are placed in the vicinity of the four corners of the element.
    The flexible wedge can take different forms and be arranged in different ways.
    In a first variant shown in Figure 4a, a single piece (3) forms a flexible shim common to several elements (la, lb, le). This piece is in the form of a ribbon that makes an S-shaped path around the elements.
    In a second variant shown in Figure 4b, each flexible wedge (3) has a rectangular shape and there is a flexible wedge element.
    In a third variant shown in Figure 4c, the flexible wedge (3) consists of several portions (3 ', 3 ", 3'") in the form of a frame fitting into each other. These portions have different hardnesses depending on their position relative to the element. For example, it is advantageous to provide a softer material for the portion of the flexible wedge in contact with the region located in the center of the face of the element (3 '), because it is this region of the element that inflates the most. A more rigid material can be provided for the portion of the flexible wedge in contact with the region located at the periphery of the face of the element (3 '"), since it is this region of the element which inflates the least . This effect can also be achieved by using a one-piece flexible shim made of a material whose hardness decreases as one approaches the center of the face of the element.
    Figure 5 shows the different possibilities of combination between the different embodiments of the rigid shim and those of the flexible shim. The preferred embodiment is one in which a rigid wedge-shaped frame is associated with a flexible wedge-shaped rectangle (2nd column, 2nd line of the table of Figure 5). The invention also relates to a method of manufacturing a battery that uses the system for compensating the swelling of the elements, as described above. This method can be used to manufacture a battery comprising at least two elements. It comprises the following steps: a) provision of a first prismatic format element (1a), b) establishment of a first rigid wedge (2) having a hardness greater than or equal to 90 Shore A according to the standard ASTM D 2240 and a first flexible shim (3) having a hardness of up to 60 Shore A according to ASTM D 2240, against one of the faces of the first element (6), c) a second prismatic format element (lb) against the first rigid wedge and the first flexible wedge,
    The first flexible wedge (3) generally has a thickness greater than that of the first rigid wedge (2), and during step c) of joining the second element (Ib), the thickness of the first flexible wedge is reduced under the compression exerted by the second element.
    In one embodiment, the method further comprises a step d) of setting up a second rigid wedge having a hardness greater than or equal to 90 Shore A according to ASTM D 2240 and a second flexible wedge having a Hardness up to 60 Shore A according to ASTM D 2240, against one of the faces of the second element. According to a variant of this embodiment, steps c) and d) are reversed, that is to say that the elements of flexible and rigid wedges are first provided before attaching them to each other. other.
    It is understood that this manufacturing process is not limited to the assembly of two elements in a grouping box but that it can be used regardless of the number of elements present in the box.
    In one embodiment, the assembly comprises as many rigid shims and soft shims as elements.
    In a preferred embodiment, for a given number n of elements, the assembly comprises n + 1 sets of flexible wedges and rigid wedges, that is to say that each element is provided with a flexible wedge and a rigid shim, except for one of the two elements located at the end of the assembly, which then comprises a flexible shim and a rigid shim on two opposite faces.
    The elements can be assembled in the grouping box in an orientation for which all current output terminals of the same polarity are in the same line. But they can also be assembled in an orientation for which an alternation of current terminals of opposite polarities is arranged along the same line. The invention solves the problem of swelling prismatic electrochemical elements when they are assembled side by side, while preserving the thermal insulation between elements. The compression of the electrodes, necessary to preserve the resistance of the active material of the electrodes is nonetheless guaranteed.
    Another advantage of the invention is that it allows the manufacture of a battery whose length is constant over time.
    Finally, an advantage of the invention is to facilitate the integration of other components in the battery, such as power connections between the electrical terminals. The invention has been described in the foregoing with reference to electrochemical elements of prismatic shape, but the skilled person could consider applying it to cylindrical elements, using flexible and rigid blocks of cylindrical format.
    权利要求:
    Claims (19)
    [1" id="c-fr-0001]
    A battery comprising at least two electrochemical elements (1a, 1b) of prismatic format, wherein the electrochemical elements are separated by a rigid shim (2) having a hardness greater than or equal to 90 Shore A according to ASTM D 2240 and by a flexible shim (3) having a hardness of up to 60 Shore A according to ASTM D 2240, the rigid shim and the flexible shim being electrically insulating.
    [2" id="c-fr-0002]
    2. Battery according to claim 1, wherein the rigid shim (2) and / or the flexible wedge (3) is (are) constituted (s) of an electrical insulating material, or a first electrically conductive material covered a second electrical insulating material.
    [3" id="c-fr-0003]
    3. Battery according to claim 2, wherein the flexible wedge (3) is made of plastic material or consists of a metal spring covered with an insulating material, such as a plastic material.
    [4" id="c-fr-0004]
    4. Battery according to one of the preceding claims, wherein the flexible wedge (3) comprises a material whose thermal conductivity is less than or equal to 0.5 W / (mK), preferably from 0.02 to 0, 2 W / (mK).
    [5" id="c-fr-0005]
    5. Battery according to one of the preceding claims, wherein the flexible wedge (3) comprises several portions of different hardness (3 ', 3 ", 3'").
    [6" id="c-fr-0006]
    6. Battery according to claim 5, wherein a first portion (3 ') in contact with the vicinity of the center of a wall of the electrochemical element has a hardness less than that of a second portion (3' ") in contact. the vicinity of the periphery of this wall of the electrochemical element.
    [7" id="c-fr-0007]
    7. Battery according to one of the preceding claims, wherein the rigid shim (2) has a vertical portion (4) and a horizontal portion (5), the vertical portion being disposed against a vertical wall (6) of an element. electrochemical and the horizontal portion being disposed against a horizontal wall (7) of this electrochemical element.
    [8" id="c-fr-0008]
    8. Battery according to claim 7, wherein the horizontal portion (5) of the rigid shim comprises at least one orifice (8, 9) through which a current output terminal (10, 11) of the electrochemical element s 'inserts.
    [9" id="c-fr-0009]
    9. Battery according to one of the preceding claims, comprising as many rigid shims as electrochemical elements, the rigid shims forming a single piece.
    [10" id="c-fr-0010]
    10. Battery according to one of claims 1 to 8, comprising as many rigid shims as electrochemical elements, the rigid shims, being distinct from each other.
    [11" id="c-fr-0011]
    11. Battery according to claim 10, wherein the rigid shims have the shape of a rectangular frame.
    [12" id="c-fr-0012]
    12. Battery according to one of claims 1 to 8, comprising as many rigid shims as electrochemical elements, each shim being formed of at least two distinct subcomponents (2a 1, 2a2, 2b 1, 2b2, 2c 1 , 2c2).
    [13" id="c-fr-0013]
    13. Battery according to claim 12, in which the two distinct subcomponents are each in the form of a "T", one being arranged in the vicinity of the upper part (2al, 2bl, 2c) of the electrochemical element. other being disposed in the vicinity of the lower part (2a2, 2b2, 2c2) of the electrochemical element.
    [14" id="c-fr-0014]
    14. Battery according to claim 12, wherein a rigid shim comprises at least three distinct subcomponents, each subcomponent having for example a circular shape (2dl, 2d2, 2d3, 2d4).
    [15" id="c-fr-0015]
    15. Battery according to one of the preceding claims, comprising a single flexible wedge common to all the electrochemical elements.
    [16" id="c-fr-0016]
    16. Battery according to one of claims 1 to 14, comprising as many flexible shims as electrochemical elements, the flexible shims being distinct from each other.
    [17" id="c-fr-0017]
    17. Battery according to one of the preceding claims, wherein the electrochemical elements are of lithium-ion type.
    [18" id="c-fr-0018]
    18. A method of assembling a battery comprising at least two electrochemical elements (1a, 1b), said method comprising the steps of: a) providing a first electrochemical element (1a) of prismatic format, b) placing in place of a rigid shim (2) having a hardness greater than or equal to 90 Shore A according to ASTM D 2240 and a soft shim (3) having a hardness of up to 60 Shore A according to ASTM D 2240, against one of the faces of the first electrochemical element, c) connection of a second electrochemical element (lb) of prismatic format against the rigid wedge and the flexible wedge.
    [19" id="c-fr-0019]
    19. The method of claim 18, wherein, before step c) of joining the second electrochemical element (lb), the flexible wedge has a thickness greater than that of the rigid wedge, and during step c ) of the second electrochemical element, the thickness of the flexible wedge is reduced under the compression exerted by the second electrochemical element.
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    同族专利:
    公开号 | 公开日
    EP3208866B1|2018-09-26|
    EP3208866A1|2017-08-23|
    US10840494B2|2020-11-17|
    US20170244088A1|2017-08-24|
    FR3048129B1|2020-04-17|
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    KR20140064418A|2012-11-20|2014-05-28|에스케이이노베이션 주식회사|Secondary battery module|
    JP6211757B2|2012-11-29|2017-10-11|トヨタ自動車株式会社|Power storage device|
    KR101730961B1|2013-01-04|2017-04-27|삼성에스디아이 주식회사|Battery module having heat insulating member|
    KR20150031875A|2013-09-17|2015-03-25|삼성에스디아이 주식회사|Battery module|
    DE102013224915A1|2013-12-04|2015-06-11|Audi Ag|Module having at least two cells for outputting electrical energy and a separating element arranged between the cells|KR102070684B1|2017-01-24|2020-01-29|주식회사 엘지화학|Secondary battery evaluation apparatus|
    DE102017008102A1|2017-08-29|2019-02-28|Carl Freudenberg Kg|Energy storage system|
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    DE102019211093A1|2019-07-25|2021-01-28|Audi Ag|Battery for an at least partially electrically operated / driven functional device and functional device|
    法律状态:
    2017-02-01| PLFP| Fee payment|Year of fee payment: 2 |
    2017-08-25| PLSC| Publication of the preliminary search report|Effective date: 20170825 |
    2018-02-06| PLFP| Fee payment|Year of fee payment: 3 |
    2020-02-04| PLFP| Fee payment|Year of fee payment: 5 |
    2021-02-09| PLFP| Fee payment|Year of fee payment: 6 |
    2022-02-14| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1651299|2016-02-18|
    FR1651299A|FR3048129B1|2016-02-18|2016-02-18|ELECTROCHEMICAL COMPONENT COMPENSATION SYSTEM|FR1651299A| FR3048129B1|2016-02-18|2016-02-18|ELECTROCHEMICAL COMPONENT COMPENSATION SYSTEM|
    EP17155548.5A| EP3208866B1|2016-02-18|2017-02-10|System to compensate for the swelling of electrochemical elements|
    US15/435,514| US10840494B2|2016-02-18|2017-02-17|Compensation system for swelling of electrochemical cells|
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