• 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 relates to a housing (B) incorporating a smoothing capacitance of an electric powertrain disposed between a negative bus and a positive bus internal to the housing (B), the latter comprising: a first positive output terminal (BP1 ) and a first negative output terminal (BN1) connectable to the inputs of an inverter, - a second positive output terminal (BP2) and a second negative output terminal (BN2) respectively connected to the positive internal bus and the negative internal bus, - two electrical connection securing terminals (PFP, PFN) insulated from the positive and negative internal buses, - a fuse (FUSP) electrically fixed between the second positive terminal (BP2) and one of the mounting lugs ( PFP), and another fuse (FUSN) electrically fixed between the second negative terminal (BN2) and the other of the fixing lugs (PFN).
    公开号:FR3033097A1
    申请号:FR1551518
    申请日:2015-02-23
    公开日:2016-08-26
    发明作者:Christophe Franco；Roselyne Texier
    申请人:Renault SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates generally to the field of electrical engineering and relates more specifically to a powertrain for an electric or hybrid vehicle and a capacitive housing for such a powertrain. Electric powertrains for at least partially electric traction / propulsion cars comprise a large number of components, in addition to the electric motor and the traction battery. These components include the traction inverter, but also a fuse box and capacitive modules, as well as cooling and connection devices. The size of this type of powertrain is therefore difficult to reduce, which notably leads to difficult maintenance and constraints on the architecture of the vehicle. Such a powertrain is described in particular in patent US8820467. It should be noted that in this application "traction battery" is called a battery delivering a voltage of the order of several hundred volts, suitable for supplying an electric motor inverter capable of transmitting torque to the wheels of a vehicle , as opposed to service batteries delivering a voltage of about 14V (volts). The invention is therefore not limited to vehicles operating only in traction but also applies to vehicles operating in propulsion.
    [0002] Electric powertrains also require secure access to the fuses present on the network fed by the traction battery before an intervention, said "high voltage" network. But it is difficult to reconcile ease of access and small size. In addition, in the event of a frontal impact, for example, if an electric powertrain has been damaged, in particular at the connections connecting the components of the power train 3033097 2 between each other, a check of absence of voltage at the fuse box will not guarantee not necessarily the absence of voltage upstream of the housing. This is why the patent application WO201495394 proposes to put a fuse box as close as possible to the traction battery, under the vehicle. However, such positioning does not make access to the fuse box very easy. One of the objects of the invention is to overcome at least a part of the disadvantages of the prior art by providing a capacitive gearbox for powertrains incorporating the fuses of the network fed by the traction battery, as well as an electronic housing. power unit and a powertrain incorporating such a housing. To this end, the invention proposes a housing incorporating a smoothing capacitance of an electric powertrain, said capacitor being disposed between a negative bus and a positive bus internal to said housing, said housing comprising: a first positive output terminal; connected on the one hand to said positive internal bus and able to be connected on the other hand to a first input of an inverter of said powertrain, and a first negative output terminal connected on the one hand to said negative internal bus and adapted to be connected on the other hand to a second input of said inverter, a second positive output terminal connected to said positive internal bus and a second negative output terminal connected to said negative internal bus, said housing being characterized in that it comprises furthermore: two electrical connection fixing tabs, said tabs being isolated from said positive and negative internal buses; a fuse only one of the electrical terminals is fixed to said second positive terminal and the other of the electrical terminals is fixed to one of said fixing lugs, and another fuse whose one of the electrical terminals is fixed to said second negative terminal. and the other of the electrical terminals is attached to the other of said fastening tabs. Thanks to the invention, it avoids the use of a housing dedicated to the fuses 5 in the powertrain, which reduces its size and cost, and saves electrical connections can be long between the fuses and the group component powerplant to which they are attached. This reduces the risk of cutting these connections in case of shock.
    [0003] The invention exploits, for the reduction of these electrical connections, the presence of busbars internal to the smoothing ability, which by a few simple modifications can thus provide several electrical connection points to the electrical architecture of the powertrain. Bus bar is here called a rigid electrical conductor intended to be traversed by currents of high intensity. It is generally a strip of rectangular section, for example copper or aluminum, connected at each end to an electronic power module such as an inverter module or a capacitive module. According to an advantageous characteristic of the housing according to the invention, said electrical terminals of said fuses fixed to said fixing lugs are electrically connected to the high voltage network of the vehicle comprising said powertrain. Thus, the mounting lugs provide a connection to the high voltage network of the vehicle, without the need for additional connection points.
    [0004] Advantageously, said fuses are electrically connected to said terminals and said tabs by a screw-nut system. This simple connection allows easy assembly of new connections on the high voltage network of the vehicle implementing the invention. It also allows easy change of fuses during repair operations.
    [0005] Advantageously, said housing further comprises a third positive terminal connected on the one hand to said positive internal bus and able to be connected to a first input of another inverter of said powertrain, and a third negative terminal. connected on the one hand to said negative internal bus and able to be connected on the other hand to a second input of said other inverter.
    [0006] Thus the capacitive box according to the invention allows a connection of the battery to two inverters, for example to supply two electric traction motors. The invention also relates to a sealed casing of power electronics in which is inserted the housing according to the invention, - said housing having remote output terminals corresponding to said positive and negative output terminals of said housing, - said housing having a positive output leg connected to said positive internal bus and a negative output leg connected to said negative internal bus, and said sealed housing having two orifices respectively opposite said positive and negative output tabs and a cover for protecting said orifices. said cover being provided with a seal. The tightness of the casing comprising the capacitive casing makes it possible to protect the elements it contains against water and dust, in particular. The casing allows a greater resistance of the capacitive casing in case of impact, and its orifices make it possible to perform a check of absence of voltage at the output tabs of the capacitive casing. The possibility of carrying out such an absence of voltage check at the level of the capacitive box makes it possible to limit the risks of electrocution due to an upstream cut-off of connections. Preferably, said orifices are adapted to the introduction of a voltage-free verification probe, and said cover protects a third orifice formed in said housing opposite an electrical safety device. Said electrical safety device is able to cause rapid discharge 30 of said smoothing ability on opening said lid.
    [0007] The optional use of the housing according to the invention requires the offset of the output terminals of the capacitive housing at the housing itself. Preferably the offset of said positive and negative output terminals of said housing at said housing is made from busbars or cables. Advantageously, said casing comprises a discharge resistor connected between one of said positive output terminals and one of said negative output terminals of said casing. This discharge resistance ensures an automatic slow discharge of the smoothing ability in a few minutes without intervention of the safety device, which may be useful in the event of a defect thereof, due for example to a shock of the vehicle. This discharge resistance makes it possible to discharge the smoothing capacity before intervention on the inverter, for example. The invention further relates to a powertrain integrating said housing and / or said housing according to the invention, said powertrain comprising a traction battery, an electric machine and one or more inverters.
    [0008] Other characteristics and advantages will appear on reading a preferred embodiment described with reference to the figures in which: FIG. 1 represents a capacitive housing of a powertrain according to the invention, FIG. inside a housing incorporating a capacitive housing variant of a powertrain according to the invention; and FIG. 3 represents an access device in said housing for a voltage-free verification, according to the invention. .
    [0009] According to a preferred embodiment of the invention shown in FIG. 1, a smoothing capacitance of an electric powertrain of an electric vehicle is integrated in a capacitive box B. This powertrain comprises a traction battery feeding two electric traction machines using two inverters. The capacitive box B is at the output of the traction battery, between the positive bus and the negative bus 5 which feed the two inverters. The capacitive box B comprises, in this preferred embodiment: a first positive output terminal BP1 intended to be connected to a first input of a power train inverter, and a first negative output terminal BN1 intended to be connected to a second input of this inverter, a second positive output terminal BP2 and a second negative output terminal BN2, a third positive output terminal BP3 intended to be connected to a first input of a second inverter of the power plant, and a third negative output terminal BN3 to be connected to a second input of this second inverter. According to the invention, the second terminals positive BP2 and negative BN2 are used to fix and electrically connect two fuses of the high voltage network of the vehicle, powered by the traction battery of the powertrain. For this, the housing B comprises two PFP and PFN fixing tabs electrically isolated from the smoothing ability. A first FUSP fuse is attached to the positive bus of the high voltage network between the positive terminal BP2 and the bracket PFP. A second FUSN fuse is attached to the negative bus of the high-voltage network between the negative terminal BN2 and the fixing lug PFN. These fasteners are made by a screw-nut system at threaded holes present on the positive terminals BP2 and negative BN2. The screws of the fixing brackets PFP and PFN are used to electrically connect the fuses to the high voltage network of the vehicle, powered by the traction battery, itself protected by relays, that is to say by power switches. connected to the plus and minus terminals of the traction battery.
    [0010] In order to protect the capacitive box B and the fuses FUSP and FUSN, an alternative embodiment of the invention consists of integrating this capacitive box B into a sealed case C of power electronics, represented in FIG. embodiment of the invention, the output terminals 5 of the housing B intended to be connected to the inverters of the powertrain are located on an opposite side of the housing to that which supports the fuses FUSN and FUSP. FIG. 2 also shows in cross-section the positive internal bus BPI and negative bus BNI between which the smoothing capacitance is arranged.
    [0011] The positive output terminals of the box B are all connected to the positive internal bus BPI while the negative output terminals of the box B are all connected to the internal bus BNI. BB1 bus bars are used to deport the first output terminals BP1 and BN1 of the housing B to corresponding output terminals of the housing 15 C, while BB3 bus bars are used to deport the third output terminals BP3 and BN3 of the housing B to corresponding output terminals of the casing C. It should be noted that the busbars BB1 and BB3 each comprise a positive busbar and a positive busbar isolated from each other. A branch of the busbars BB1 electrically connects them to an output CB connector 20 to be connected to the traction battery of the vehicle. In addition, it should be noted that the remote output terminals at the casing C are electrically insulated from the remainder of the casing C. In fact, the walls of the casing C are connected to the mass of the vehicle, that is to say to its chassis, and must therefore be electrically isolated from the smoothing ability.
    [0012] Similarly, an electric cable CP serves to connect the electrical terminal of the fuse FUSP attached to the bracket PFP, to a corresponding output terminal of the housing C, while an electric cable CN serves to connect the electrical terminal of the FUSN fuse attached to the PFN bracket, to a corresponding output terminal of the C housing.
    [0013] Furthermore, in this variant embodiment of the invention, the internal positive bus BPI has a positive output tab PP at the output of the box B, and the internal negative bus BNI has a negative output tab PN at the output of the housing B, the output tabs PP and PN are not far from each other. For example they are distant of the order of 1 to 3 centimeters from each other. Between these two legs is a DS 5 electrical safety device still called "interlock", fixed to the housing B. The casing C has orifices ON, 01 and OP respectively facing the negative output tab PN, the safety device DS and positive output paw PP.
    [0014] These openings are protected by a COP cover provided with a seal J, shown in FIG. 3. The cover COP of the sealed casing C comprises orifices OCP and OCN superimposable respectively on the orifices OP and ON. These orifices OCP and OCN make it possible to fix the lid COP on the rest of the casing C by means of pads or respective screws VP and VN 15 sealed. They allow access to the output tabs PP and PN to perform a verification of absence of voltage. It should be noted that to perform a voltage-free verification, it is necessary to be able to access the electrical connections to be checked by means of a voltage-free verification tool. This tool uses thinner probes than human fingers. The standard imposing that an operator can not access by these fingers to these electrical connections, OP, 01 and ON holes must be thin enough for an operator can not pass his fingers. The electrical safety device DS is able to warn a management device of the vehicle charging system, the opening of the lid COP. This management device then controls the active discharge, in a few seconds, the smoothing ability. This control involves the traction inverter which dissipates the energy contained in the smoothing capacitance in the stator windings of the vehicle.
    [0015] The presence of an access for an absence of voltage check at the level of the smoothing capacitor has the advantage of a better security compared to an absence of voltage check at a fuse box. deported. Indeed a break connection between the housing and the smoothing ability is likely to lead to misdiagnosis and therefore an electric shock for an operator.
    [0016] In another variant embodiment, not shown, a discharge resistor in the casing C makes it possible to discharge the smoothing capacitance. This discharge resistor is for example connected at one of its ends to one of the negative output terminals BN1 or BN3 of the capacitive box B, the other of its ends being connected to a corresponding positive output terminal BP1 or BP3 of the box B It should be noted that other embodiments of the invention are conceivable, for example, in a variant, the capacitive box according to the invention has only one positive output terminal and one negative output terminal intended for 15 be connected to an inverter, in the case where the powertrain only operates with one traction inverter. In other variants, the output terminals of the housing B are arranged differently. 20
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Housing (B) incorporating a smoothing capacitance of an electric powertrain, said capacitor being disposed between a negative bus and an internal positive bus (BPI, BNI) to said housing (B), said housing (B) comprising: - a first positive output terminal (BP1) connected on the one hand to said positive internal bus (BPI) and able to be connected on the other hand to a first input of an inverter of said powertrain, and a first negative output terminal (BN1) connected on the one hand to said negative internal bus (BNI) and able to be connected on the other hand to a second input of said inverter, - a second positive output terminal (BP2) connected to said positive internal bus (BPI) and a second terminal negative output terminal (BN2) connected to said negative internal bus (BNI), said housing (B) being characterized in that it further comprises: - two fixing lugs (PFP, PFN) for electrical connection, said lugs being isolated from said bus intern positive and negative (BPI, BNI), - a fuse (FUSP) whose one of the electrical terminals is fixed to said second positive terminal (BP2) and the other of the electrical terminals is fixed to one of said fixing lugs ( PFP), and another fuse (FUSN) whose one of the electrical terminals is fixed to said second negative terminal (BN2) and the other of the electrical terminals is fixed to the other of said fixing lugs (PFN).
    [0002]
    2. Housing (B) according to claim 1, characterized in that said fuses (FUSP, FUSN) are electrically connected auditées terminals (BP2, BN2) and said tabs (PFP, PFN) by a screw-nut system.
    [0003]
    3. Housing according to claim 1 or 2, characterized in that it further comprises a third positive terminal (BP3) connected on the one hand to said positive internal bus (BPI) and able to be connected on the other hand to a first Input of another inverter of said powertrain, and a third negative terminal (BN3) connected on the one hand to said negative internal bus (BNI) and able to be connected on the other hand to a second input of said other inverter. 5
    [0004]
    4. Housing (C) sealed power electronics in which is inserted a housing (B) according to any one of claims 1 to 3, characterized in that - said housing (C) has corresponding remote output terminals At said positive and negative output terminals (BP1, BP2, BP3, BN1, BN2, BN3) of said housing (B), said housing (B) has a positive output tab (PP) connected to said positive internal bus (BPI) and a negative output tab (PN) connected to said negative internal bus (BNI), and said sealed case (C) has two orifices (OP, ON) located respectively opposite said positive (PP) and negative ( PN) and a protective cover (COP) of said orifices (OP, ON), said cover (COP) being provided with a seal (J). 20
    [0005]
    5. Carter (C) according to claim 4, characterized in that said orifices (OP, ON) are adapted to the introduction of a voltage-free verification probe, and that said cover (COP) protects a third orifice (01) formed in said housing (C) facing an electrical safety device (DS). 25
    [0006]
    6. Carter (C) according to claim 5, characterized in that said electrical safety device (DS) is adapted to cause the rapid discharge of said smoothing capacitance at the opening of said cover (COP). 30
    [0007]
    7. Carter (C) according to any one of claims 4 to 6, characterized in that the offset of said positive and negative output terminals (BP1, BP2, 3033097 12 BP3, BN1, BN2, BN3) of said housing (B) at the level of said housing (C) is made from busbars (BB1, BB3) or cables.
    [0008]
    The housing (C) according to any one of claims 4 to 7, characterized in that said housing (C) comprises a discharge resistor connected between one of said positive output terminals and one of said negative output terminals of said housing ( B).
    [0009]
    9. Powertrain comprising a housing (B) according to any one of claims 1 to 3, a traction battery, an electric machine and one or more inverters, characterized in that said electrical terminals of said fuses (FUSP, FUSN) fixed to said fixing lugs (PFP, PFN) are electrically connected to the high voltage network of the vehicle comprising said powertrain. 15
    [0010]
    The power train of claim 9, wherein said housing (B) is inserted into a power electronics housing (C) according to any one of claims 4 to 8.
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    同族专利:
    公开号 | 公开日
    WO2016135393A1|2016-09-01|
    FR3033097B1|2017-03-10|
    EP3261874B1|2019-12-11|
    EP3261874A1|2018-01-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5882213A|1997-10-03|1999-03-16|Ut Automotive Dearborn, Inc.|Battery mounted junction box|
    US20140319909A1|2011-11-30|2014-10-30|Honda Motor Co., Ltd.|Power control unit|FR3064410A1|2017-03-24|2018-09-28|Renault S.A.S.|CAPACITIVE HOUSING FOR AN ELECTRIC MOTOR POWERTRAIN, AND A MOTOR VEHICLE EQUIPPED WITH SUCH A HOUSING|
    CN112224026A|2020-11-09|2021-01-15|中车株洲电力机车有限公司|Locomotive high-voltage control circuit, high-voltage box and locomotive|FR2951408B1|2009-10-15|2012-01-13|Renault Sa|MOTOR FRAME FOR MOTOR VEHICLE ELECTRIC MOTOR|
    FR2988901B1|2012-04-03|2015-01-30|Renault Sa|DEVICE FOR ELECTRICAL SAFETY CUT|
    FR2999518B1|2012-12-18|2016-01-08|Renault Sas|ARRANGEMENT OF A BASE STRUCTURE OF A MOTOR VEHICLE WITH AN ENCLOSURE COMPRISING A CIRCUIT BREAKER CONTROL DEVICE|IT201600090442A1|2016-09-07|2018-03-07|Johnson Electric Asti S R L|Electrical connection assembly for an electric motor, particularly for a brushless motor vehicle motor.|
    法律状态:
    2016-02-18| PLFP| Fee payment|Year of fee payment: 2 |
    2016-08-26| PLSC| Publication of the preliminary search report|Effective date: 20160826 |
    2017-02-17| PLFP| Fee payment|Year of fee payment: 3 |
    2018-02-23| PLFP| Fee payment|Year of fee payment: 4 |
    2020-02-19| PLFP| Fee payment|Year of fee payment: 6 |
    2021-11-12| ST| Notification of lapse|Effective date: 20211005 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1551518A|FR3033097B1|2015-02-23|2015-02-23|CAPACITIVE HOUSING FOR ELECTRIC MOTOR POWERS, CRANKCASE AND CORRESPONDING MOTOR POWERS|FR1551518A| FR3033097B1|2015-02-23|2015-02-23|CAPACITIVE HOUSING FOR ELECTRIC MOTOR POWERS, CRANKCASE AND CORRESPONDING MOTOR POWERS|
    EP16707920.1A| EP3261874B1|2015-02-23|2016-02-16|Capacitor housing and box for electric drive unit|
    PCT/FR2016/050347| WO2016135393A1|2015-02-23|2016-02-16|Capacitive box and casing for electric power train|
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