JP2017174702A - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
JP2017174702A
JP2017174702A JP2016061141A JP2016061141A JP2017174702A JP 2017174702 A JP2017174702 A JP 2017174702A JP 2016061141 A JP2016061141 A JP 2016061141A JP 2016061141 A JP2016061141 A JP 2016061141A JP 2017174702 A JP2017174702 A JP 2017174702A
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Japan
Prior art keywords
battery modules
connector
wire harness
battery
fixing
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Granted
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JP2016061141A
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Japanese (ja)
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JP6597440B2 (en
Inventor
武徳 小林
Takenori Kobayashi
武徳 小林
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トヨタ自動車株式会社
Toyota Motor Corp
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Priority to JP2016061141A priority Critical patent/JP6597440B2/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack which suppress increase in the number of components of a holding member that holds a wiring harness, and prevents the wiring harness from being erroneously arranged.SOLUTION: A battery pack comprises: a wiring harness 30 extending from one end of each of battery modules 1-6 and connected to a control part 20 via connectors 31C-36C; a module fixing member 50 which is disposed at one end side of each of the battery modules 1-6 in such a manner that extension parts of first wiring harnesses 31A-33A of the battery modules 1-3 are covered, and to which one end of each of the battery modules 1-6 is fixed; and a connector fixing member 70 which is attached to the module fixing member 50 and to which the connectors 31C-36C are fixed. The module fixing member 50 includes a wiring harness opening 57 in a portion corresponding to the extension parts of the first wiring harnesses 31A-33A, and the wiring harness opening 57 has such a size that one wiring harness can be inserted.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a battery pack, and more particularly to a battery pack provided with battery modules arranged adjacent to each other in a plurality of rows and a plurality of stages.

  A battery pack for driving a traveling motor is mounted on an electric vehicle such as an electric vehicle or a hybrid vehicle. The battery pack includes a module assembly in which battery modules arranged adjacent to each other in a plurality of rows and stages are integrated. Each battery module is connected to a wire harness for transmitting information such as battery voltage and battery temperature, and a battery cable for supplying power.

  Japanese Patent Application Laid-Open No. 2004-228561 describes a configuration that prevents erroneous wiring of a battery cable. The configuration described in Patent Document 1 is a configuration in which a battery cable is fixed to a battery body by a holding member, and another battery cable is held by a clip-shaped holding portion provided on the holding member.

JP 2011-34733 A

  When the wire harness connected to the battery modules arranged adjacent to each other in a plurality of rows and a plurality of stages is held using the holding member described in Patent Document 1, two wire harnesses can be held by one holding member. However, when the number of wire harnesses is large, a large number of holding members are required, which increases the number of parts and increases the size of the battery pack.

  On the other hand, it is conceivable to hold two or more wire harnesses on one holding member, but when a plurality of battery modules are adjacent to each other, when wiring the wire harness extending from the battery module, There is a possibility that the wire harnesses cross each other and the wire harnesses are assembled by mistake. In particular, when a wire harness is connected via a connector, there is a possibility that the connector is erroneously connected.

  Therefore, an object of the present invention is to provide a battery pack that suppresses an increase in the number of parts of a holding member that holds a wire harness and prevents incorrect wiring of the wire harness.

  The battery pack of the present invention includes a plurality of battery modules arranged adjacent to each other in a plurality of rows and a plurality of stages, a control unit that controls the plurality of battery modules, and a plurality of battery modules that extend from one end in the long axis direction. A plurality of the battery modules disposed on one end side of the battery module so as to cover a wire harness connected to the control unit via a connector and at least a part of the wire harness extending part of the battery module. A module fixing member to which the one end of each module is fixed; and a connector fixing member to which the connector is fixed. The module fixing member is attached to the extension portion of the wire harness. There is an opening in the corresponding part, and this opening is large enough to insert at least one wire harness. Characterized in that there.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to suppress the increase in the number of parts of the holding member holding a wire harness, the incorrect wiring of a wire harness can be prevented.

It is a schematic perspective view of a battery pack. It is a side view by which the connector fixing member of the battery pack was arrange | positioned. It is a schematic diagram of the wire harness which connects a battery module and a control part. It is an expansion perspective view of a connector fixing member. It is an enlarged view of the opening for ducts and the opening for wire harnesses which abbreviate | omitted illustration of the fixing piece.

  A battery pack 100 mounted on a hybrid vehicle according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the battery pack 100 includes battery modules 1, 2, 3, 4, 5, 6, and battery modules 1, 2, 3, 4 arranged adjacent to each other in a plurality of rows and stages. , 5, 6 based on information such as voltage, temperature, etc., control unit 20 for controlling battery modules 1, 2, 3, 4, 5, 6 and battery modules 1, 2, 3, 4, 5, 6 and control unit 20 through connectors 31C, 32C, 33C, 34C, 35C, and 36C, a connector fixing member 70 to which the connectors 31C, 32C, 33C, 34C, 35C, and 36C are fixed, and a battery module. A pair of module fixing members 50 and 50 for fixing 1, 2, 3, 4, 5, and 6 to a vehicle body (not shown) are provided.

  The battery modules 1, 2, 3 and the battery modules 4, 5, 6 are arranged in parallel, and the battery modules 4, 5, 6 are placed on top of the battery modules 1, 2, 3. That is, the battery modules 1, 2, 3 and the battery modules 4, 5, 6 are stacked in two upper and lower stages.

  In a state where the battery modules 1, 2, 3, 4, 5, 6 are arranged adjacent to each other in three rows and two stages, a pair of module fixing members are provided at both ends of the battery modules 1, 2, 3, 4, 5, 6 50 and 50 are fixed by bolts 51. In FIG. 1, only the module fixing member 50 on the labor side is shown. In this way, the module assembly 10 is configured by the battery modules 1, 2, 3, 4, 5, 6 being sandwiched and integrated from both ends by the pair of module fixing members 50, 50. Yes. Details of the module fixing member 50 will be described later. In addition, according to the specification of the battery pack 100, the number, arrangement | sequence, and number of steps of a battery module can be changed suitably.

  Since the configurations of the battery modules 1, 2, 3, 4, 5, 6 are all the same, the battery module 4 will be described below, and the description of the other battery modules 1, 2, 3, 5, 6 will be omitted. . The battery module 4 has a rectangular parallelepiped shape and includes a plurality of single cells. The single battery is a chargeable / dischargeable secondary battery, such as a nickel metal hydride battery or a lithium ion battery housed in a cylindrical case.

  A first wire harness 34A of a wire harness 30 for outputting information such as voltage and temperature of the battery module 4 to the control unit 20 is connected to one end side in the long axis direction (Y direction in the figure) of the battery module 4. Has been. The battery modules 1, 2, 3, 4, 5, and 6 are disposed so that the first wire harnesses 31 </ b> A, 32 </ b> A, 33 </ b> A, 34 </ b> A, 35 </ b> A, and 36 </ b> A of the wire harness 30 extend in the same direction. Has been.

  As shown in FIG. 2, while the battery modules 1 and 2 are adjacent to each other, a cooling duct 60 for cooling the battery modules 1, 2, 3, 4, 5 and 6 is provided in the long axis direction of the battery modules 1 and 2. (Y direction, see FIG. 1). The cooling duct 60 passes through the module assembly 10 and includes a plurality of ventilation holes. A cooling fan (not shown) is connected to one end of the cooling duct 60, and air from the cooling fan is guided to the gap between the battery modules 1, 2, 3, 4, 5, 6 through the vent holes. Then, the battery modules 1, 2, 3, 4, 5, 6 are cooled.

  Returning to FIG. 1, the control unit 20 is disposed on the upper part of the module assembly 10. The control unit 20 is provided with a control unit connector 21 to which the wire harness 30 is connected. Moreover, the control part 20 is connected to the control unit of the vehicle which is not shown in figure, and outputs the state of battery module 1,2,3,4,5,6 to a control unit.

  FIG. 3 shows a schematic diagram of wiring by the wire harness 30. As shown in FIG. 3, the wire harness 30 includes a first wire harness 31A, 32A, 33A, 34A, 35A, 36A extending from the battery modules 1, 2, 3, 4, 5, 6 and a control unit connector. 21, the second wire harnesses 31B, 32B, 33B, 34B, 35B, 36B, the first wire harnesses 31A, 32A, 33A, 34A, 35A, 36A and the second wire harnesses 31B, 32B, Connectors 31C, 32C, 33C, 34C, 35C, and 36C that connect 33B, 34B, 35B, and 36B to each other are provided.

  The connector 31C includes a first connector 31C1 connected to one end of the first wire harness 31A and a second connector 31C2 connected to one end of the second wire harness 31B. The other connectors 32C, 33C, 34C, 35C, and 36C are configured similarly to the connector 31C.

  The other ends of the second wire harnesses 31B, 32B, 33B, 34B, 35B, and 36B are connected to the control unit connector 21, respectively. That is, six wire harnesses extend from the control unit connector 21. In FIG. 2, as indicated by a one-dot chain line, six of the second wire harnesses 31B, 32B, 33B, 34B, 35B, and 36B are integrated and configured as one harness.

  As shown in FIGS. 1 and 2, the module fixing member 50 on the side to which the first wire harnesses 31A, 32A, 33A, 34A, 35A, and 36A are connected includes the end surfaces of the battery modules 1, 2, and 3 and the battery module. It is a flat plate member that covers substantially the lower half of the end faces of 4, 5, and 6. That is, the module fixing member 50 covers portions where the first wire harnesses 31A, 32A, and 33A extend from the battery modules 1, 2, and 3.

  A pair of fixing pieces 52, 52 for fixing the module fixing member 50 to a vehicle body (not shown) are provided at both lower ends of the module fixing member 50. The fixed piece 52 is provided with a through hole 52a through which a bolt is inserted.

  As shown in FIGS. 2, 4, and 5, a rectangular duct opening 53 through which the cooling duct 60 is inserted is provided in a portion of the module fixing member 50 facing the cooling duct 60. Since the cooling duct is disposed while the battery modules 1 and 2 are adjacent to each other, the duct opening 53 is also disposed while the battery modules 1 and 2 are adjacent to each other. The first wire harnesses 31 </ b> A and 32 </ b> A are disposed at portions extending from the battery modules 1 and 2.

  In the duct opening 53, a wire harness opening 57 through which the first wire harnesses 31 </ b> A and 32 </ b> A are inserted is formed continuously to the duct opening 53. In other words, in the present invention, the size of the duct opening 53 through which the cooling duct 60 is inserted is slightly increased, so that it is used as the wire harness opening 57 through which the first wire harness 31A, 32A is inserted. In other words, in the portion of the module fixing member 50 where the first wire harnesses 31A and 32A extend from the battery modules 1 and 2, one opening composed of the duct opening 53 and the wire harness opening 57 is formed. Has been.

  As shown in FIGS. 4 and 5, a protrusion 54 that protrudes from the upper edge toward the cooling duct 60 is provided at the center of the upper edge of the wire harness opening 57. The protrusion 54 protrudes to the vicinity of the cooling duct 60. By this projection 54, the wire harness opening 57 is partitioned into two regions 57a and 57b through which the first wire harnesses 31A and 32A are inserted. The width of the partitioned regions 57a and 57b is large enough to allow one wire harness to be inserted, and only one wire harness can be inserted into the regions 57a and 57b.

  A connector fixing member 70 to which the second connectors 31C2, 32C2, 33C2, 34C2, 35C2, and 36C2 are respectively fixed is provided on the module fixing member 50. The connector fixing member 70 includes a connector attaching portion 71 to which the second connectors 31C2, 32C2, 33C2, 34C2, 35C2, and 36C2 are respectively fixed, and a fixing portion 72 to be fixed to the module fixing member 50.

  The connector mounting portion 71 is a member having an L-shaped cross section, and includes a connector mounting surface 71 b parallel to the module fixing member 50. On the opposite side of the battery module 1, 2, 3, 4, 5, 6 to the connector mounting surface 71b, the second connector 31C2, in the same arrangement state as the battery modules 1, 2, 3, 4, 5, 6 32C2, 33C2, 34C2, 35C2, and 36C2 are arranged. That is, the second connectors 31C2, 32C2, and 33C2 are arranged in parallel, and the second connectors 34C2, 35C2, and 36C2 are arranged in parallel above the second connectors 31C2, 32C2, and 33C2.

  The portion to which the second connectors 31C2, 32C2, 33C2, 34C2, 35C2, and 36C2 are attached is covered with a cover 71c. The connector mounting surface 71b is provided with a notch 71d for avoiding interference with the first wire harnesses 35A and 36A.

  The second connectors 31C2, 32C2, 33C2, 34C2, 35C2, and 36C2 include the first connectors 31C1, 32C1, 33C1, 34C1, and 35C1, of the corresponding battery modules 1, 2, 3, 4, 5, and 6, respectively. 36C1 is connected to each other.

  The second wire harnesses 31B, 32B, 33B, 34B, 35B, and 36B connected to the second connectors 31C2, 32C2, 33C2, 34C2, 35C2, and 36C2 are combined into one second connector 31C2, It passes through the lower part of 32C2 and is pulled out to the side of the connector mounting portion 71.

  The second connectors 31C2, 32C2, 33C2, 34C2, 35C2, 36C2 are arranged in consideration of the arrangement positions of the battery modules 1, 2, 3, 4, 5, 6 and the ease of connector connection work. It can be changed as appropriate.

  The fixing portion 72 is composed of a pair of fixing pieces 72a and 72b extending downward from the connector mounting surface 71b. Of the pair of fixed pieces 72a and 72b, one fixed piece 72a is located between the second connectors 32C2 and 33C2. The other fixed piece 72b is located between the second connectors 31C2 and 32C2 and is located above the wire harness opening 57. The fixing pieces 72 a and 72 b are fixed to the module fixing member 50 by bolts 55 and 55.

  The other fixed piece 72b has a tip protruding in three directions, the lower direction (Z direction) and the left and right direction (X direction), and the protruding piece 73a protruding downward is formed on the protrusion 54 provided in the wire harness opening 57. It extends to the corresponding position. The protruding pieces 73 b and 73 b protruding in the left-right direction extend beyond the edge of the wire harness opening 57. The left and right projecting pieces 73 b and 73 b are separated from the surface of the module fixing member 50 by a predetermined distance. The predetermined distance is a distance larger than the diameters of the first wire harnesses 31A and 32A. That is, an interval through which the first wire harnesses 31A and 32A can be inserted is formed between the surface of the module fixing member 50 and the projecting pieces 73b and 73b. The tips of the projecting pieces 73 b and 73 b are bent toward the surface of the module fixing member 50. The first wire harnesses 31A and 32A can be held by the projecting pieces 73b and 73b. Further, the holding performance of the first wire harnesses 31A and 32A can be improved by bending the tips of the projecting pieces 73b and 73b.

  Although the module fixing member 50 and the connector fixing member 70 have been described as separate members, the module fixing member 50 and the connector fixing member 70 may be integrally formed. By integrally forming, the number of parts can be further reduced.

  Next, the wiring of the wire harness 30 will be described. In FIG. 2, the first wire harness 33 </ b> A from the battery module 3 is routed along the side portion of the module fixing member 50. Then, the first connector 33C1 is connected to the second connector 33C2. The first connector 34C1 of the first wire harness 34A from the battery module 4 is connected to the second connector 34C2.

  The first connectors 35C1 and 36C1 of the first wire harnesses 35A and 36A from the battery modules 5 and 6 are inserted into the notches 71d of the connector mounting surface 71b and connected to the second connectors 35C2 and 36C2, respectively.

  The first connector 31C1 of the first wire harness 31A from the battery module 1 is inserted into the region 57a of the wire harness opening 57, and the first wire harness 31A is routed in the region 57a partitioned by the protrusions 54. . At this time, since only one wire harness can be inserted into the region 57a, the first wire harness 31A can be routed to a proper position (see FIG. 5). Furthermore, the first wire harness 31A is inserted between the surface of the module fixing member 50 and the protruding piece 73b, and the first connector 31C1 of the first wire harness 31A is connected to the second connector 31C2 ( (See FIG. 4).

  Similarly, the first wire harness 32A from the battery module 2 is also routed in the region 57b partitioned by the protrusion 54, and inserted between the surface of the module fixing member 50 and the protruding piece 73b. The connector 32C1 is connected to the second connector 32C2.

  After routing the first wire harnesses 31 </ b> A and 32 </ b> A of the battery modules 1 and 2, the cooling duct 60 is inserted into the duct opening 53. By inserting the cooling duct 60, the first wire harnesses 31A and 32A are held in the regions 57a and 57b, respectively, and the first wire harnesses 31A and 32A of the battery modules 1 and 2 cross each other. In addition, when the first connectors 31C1 and 32C1 are connected to the second connectors 31C2 and 31C2, the incorrect wiring of the first wire harnesses 31A and 32A can be prevented.

  As described above, since the six connectors 31C, 32C, 33C, 34C, 35C, and 36C can be fixed by one connector fixing member 70, the number of parts can be increased without increasing the number of connector fixing members 70. Can be suppressed. In addition, since the connectors 31C, 32C, 33C, 34C, 35C, and 36C can be connected at one place, workability relating to wiring harness wiring and connector connection can be improved.

  Even if the first wire harnesses 31A and 32A are adjacent to each other, the first wire harnesses 31A and 32A can be guided to the regular routing route by the regions 57a and 57b partitioned by the protrusions 54, respectively. Incorrect wiring harness wiring can be prevented. Furthermore, since the first wire harnesses 31A and 32A are routed using the duct opening 53 through which the cooling duct 60 is inserted, the routing route of the first wire harnesses 31A and 32A can be shortened. Thus, the battery pack 100 can be downsized and the material cost of the wire harness 30 can be reduced. Further, since the regions 57a and 57b are substantially surrounded by the cooling duct 60, the crossing of the first wire harnesses 31A and 32A can be further suppressed.

  In the above-described embodiment, the first wire harnesses 31 </ b> A and 32 </ b> A are routed using the duct opening 53 through which the cooling duct 60 is inserted. The openings 57 and the protrusions 54 may be provided to route the first wire harnesses 31A and 32A. For example, when the first wire harnesses 32A and 33A of the battery modules 2 and 3 extend from the sides where the battery modules 2 and 3 are adjacent to each other, the wire harness opening 57 is provided between the battery modules 2 and 3. Further, the first wire harnesses 32 </ b> A and 33 </ b> A may be routed using the wire harness openings 57 and the protrusions 54.

1, 2, 3, 4, 5, 6 Battery module, 10 module assembly, 20 control unit, 21 control unit connector, 30 wire harness, 31A, 32A, 33A, 34A, 35A, 36A first wire harness, 31B 32B, 33B, 34B, 35B, 36B Second wire harness, 31C, 32C, 33C, 34C, 35C, 36C connector, 31C1, 32C1, 33C1, 34C1, 35C1, 36C1 First connector, 31C2, 32C2, 33C2 34C2, 35C2, 36C2 Second connector, 40 connector fixing member, 50 module fixing member, 53 duct opening, 54 protrusion, 57 wire harness opening, 57a, 57b region, 60 cooling duct, 70 connector fixing member, 71 Connector mounting part, 71b Connector mounting surface, 1c cover lacks 71d cut, 72 fixing unit, 72a, 72b fixed piece, 73a, 73b protruding pieces, 100 battery pack.

Claims (1)

  1. A plurality of battery modules arranged adjacent to each other in a plurality of rows and a plurality of stages;
    A control unit for controlling the plurality of battery modules;
    A wire harness extending from one end in the major axis direction of the plurality of battery modules and connected to the control unit via a connector;
    A module fixing member disposed on one end side of the battery module so as to cover at least a part of the wire harness extending part of the battery module, and the one end of each of the plurality of battery modules being fixed;
    A connector fixing member attached to the module fixing member and to which the connector is fixed;
    With
    The module fixing member has an opening in a portion corresponding to the extending portion of the wire harness, and the opening has a size through which at least one wire harness is inserted.

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JP6597440B2 JP6597440B2 (en) 2019-10-30

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Citations (13)

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Publication number Priority date Publication date Assignee Title
JP2006332010A (en) * 2005-04-28 2006-12-07 Honda Motor Co Ltd Temperature sensor mounting structure and battery module structure
JP2008243412A (en) * 2007-03-26 2008-10-09 Nissan Motor Co Ltd Battery pack and connector module for battery pack
JP2009154824A (en) * 2007-12-27 2009-07-16 Mitsubishi Fuso Truck & Bus Corp Wiring structure of battery storage part
JP2010287516A (en) * 2009-06-15 2010-12-24 Nissan Motor Co Ltd Connector module
JP2011108653A (en) * 2009-11-19 2011-06-02 Sb Limotive Co Ltd Battery pack, vehicle, and battery pack manufacturing method
WO2012094599A2 (en) * 2011-01-07 2012-07-12 Cobasys, Llc Low profile battery pack
JP2013109914A (en) * 2011-11-18 2013-06-06 Denso Corp Battery pack
US20140141287A1 (en) * 2012-11-19 2014-05-22 Delphi Technologies, Inc. Battery pack and battery control module
JP2014203770A (en) * 2013-04-09 2014-10-27 日立オートモティブシステムズ株式会社 Power storage device
JP2015026428A (en) * 2013-07-24 2015-02-05 日産自動車株式会社 Harness protective structure for battery pack
JP2015088312A (en) * 2013-10-30 2015-05-07 トヨタ自動車株式会社 Power source device
JP2015225817A (en) * 2014-05-29 2015-12-14 株式会社豊田自動織機 Battery module and battery pack
WO2016031863A1 (en) * 2014-08-29 2016-03-03 日立オートモティブシステムズ株式会社 Electricity storage device

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006332010A (en) * 2005-04-28 2006-12-07 Honda Motor Co Ltd Temperature sensor mounting structure and battery module structure
JP2008243412A (en) * 2007-03-26 2008-10-09 Nissan Motor Co Ltd Battery pack and connector module for battery pack
JP2009154824A (en) * 2007-12-27 2009-07-16 Mitsubishi Fuso Truck & Bus Corp Wiring structure of battery storage part
JP2010287516A (en) * 2009-06-15 2010-12-24 Nissan Motor Co Ltd Connector module
JP2011108653A (en) * 2009-11-19 2011-06-02 Sb Limotive Co Ltd Battery pack, vehicle, and battery pack manufacturing method
WO2012094599A2 (en) * 2011-01-07 2012-07-12 Cobasys, Llc Low profile battery pack
JP2013109914A (en) * 2011-11-18 2013-06-06 Denso Corp Battery pack
US20140141287A1 (en) * 2012-11-19 2014-05-22 Delphi Technologies, Inc. Battery pack and battery control module
JP2014203770A (en) * 2013-04-09 2014-10-27 日立オートモティブシステムズ株式会社 Power storage device
JP2015026428A (en) * 2013-07-24 2015-02-05 日産自動車株式会社 Harness protective structure for battery pack
JP2015088312A (en) * 2013-10-30 2015-05-07 トヨタ自動車株式会社 Power source device
JP2015225817A (en) * 2014-05-29 2015-12-14 株式会社豊田自動織機 Battery module and battery pack
WO2016031863A1 (en) * 2014-08-29 2016-03-03 日立オートモティブシステムズ株式会社 Electricity storage device

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