battery pack

Abstract

The problem to be solved by the present application is that the control device can more reliably perform communication required for a fail-safe operation with an external device when thermal runaway occurs in the battery pack. To solve the above problem, the present application provides a battery pack in which the control device 40 performs communication required for a fail-safe operation with an external device when thermal runaway occurs in the battery pack 96. The first battery module 301 is arranged in the battery pack 96 closer to the first direction D1 side than the control device 40. The second battery module 302 is arranged in the battery pack 96 closer to the second direction D2 side, which is the opposite direction of the first direction D1, than the control device 40. The first wiring Lg1 extends from the control device 40 toward the first direction D1 and passes directly above the first battery module 301. The second wiring Lg2 extends from the control device 40 toward the second direction D2 and passes directly above the second battery module 302, which has the same function as the first wiring Lg1 in this communication.

Description

TECHNICAL FIELD

[0001] The present application relates to a battery pack equipped on an electric vehicle or the like. BACKGROUND

[0002] In recent years, from the viewpoint of reducing carbon dioxide emissions and mitigating adverse effects on the earth's environment, or the like, the spread of electric vehicles such as electric vehicles (EV) or hybrid electric vehicles (HEV) is being promoted. A battery pack for supplying power to a motor or the like is equipped on an electric vehicle.

[0003] [PRIOR ART DOCUMENTS]

[0004] (Patent Document)

[0005] Patent Document 1: Japanese Patent Application Publication No. 2016-18638 SUMMARY

[0006] [PROBLEMS TO BE SOLVED BY THE INVENTION]

[0007] If thermal runaway such as a thermal chain occurs in a battery module within a battery pack, a flame or high-temperature gas can be generated from the battery module. Therefore, when a temperature sensor or the like detects thermal runaway, a control device (Electronic Control Unit, ECU) within the battery pack needs to perform communication with an external device (a higher-level ECU or the like) and execute a prescribed fail-safe operation, such as blocking air from entering the battery pack and depressurizing the battery pack (opening an exhaust port), or the like.

[0008] However, when a communication wiring is present directly above a battery module, the communication wiring can be burned out by heat, and the control device can not be able to perform communication with the external device required for the fail-safe operation. In addition, in the case where a power supply wiring with respect to the control device is present directly above the battery module, the power supply wiring can also be burned out by heat and the control device can be turned off, and thus the control device can not be able to perform communication with the external device required for the fail-safe operation.

[0009] The present application was completed in view of the above circumstances, and aims to enable a control device to more reliably perform communication with an external device required for a fail-safe operation when thermal runaway occurs within a battery pack.

[0010] [MEANS FOR SOLVING THE PROBLEMS]

[0011] The inventors have considered that if the wires having the same function in the communication required for the fail-safe operation are formed in such a redundant configuration that they pass above mutually different battery modules, even if the battery module directly below one of the wires undergoes thermal runaway and the wire is burned out, the other wire will remain, thereby achieving the invention. The invention is a battery pack as follows

[0012] (1) A battery pack for vehicle, equipped on a vehicle, having:

[0013] a control device for performing a communication required for a fail-safe operation between an external device located outside the battery pack and the battery pack when thermal runaway occurs in the battery pack;

[0014] a first battery module disposed in the battery pack closer to a first direction side than the control device;

[0015] a second battery module disposed in the battery pack closer to a second direction side opposite to the first direction than the control device;

[0016] a first wire extending from the control device toward the first direction, passing above the first battery module; and

[0017] a second wire extending from the control device toward the second direction, passing above the second battery module, having the same function as the first wire in the communication.

[0018] According to the invention of the above (1), even if the first battery module undergoes thermal runaway and the first wire is burned out, the second wire will remain. In addition, even if the second battery module undergoes thermal runaway and the second wire is burned out, the first wire will remain. Therefore, compared to the case where only one of the first wire and the second wire exists, the control device can more reliably perform the communication required for the fail-safe operation with the external device.

[0019] (2) The battery pack according to the above (1), the first direction and the second direction are a vehicle width direction of the vehicle,

[0020] the battery pack has an accommodation body that accommodates the control device, the first battery module, the second battery module, the first wire, and the second wire,

[0021] the accommodation body has a recess on a lower surface, the recess being recessed upward and extending in a vehicle length direction of the vehicle,

[0022] ​The control device is positioned above the recess, and at least a portion of the control device is positioned closer to the top than the upper ends of the first and second battery modules,

[0023] The first wiring is connected to the control device closer to the top than the upper end of the first battery module, and the second wiring is connected to the control device closer to the top than the upper end of the second battery module.

[0024] According to the invention of (2), the first wiring is easily connected to the control device, and the second wiring is easily connected to the control device.

[0025] (3) The battery pack according to (1) or (2) described above, having a non-combustible plate body extending in the horizontal direction directly above the battery module,

[0026] The plate body has an opening that penetrates in the vertical direction,

[0027] At least one of the first wiring and the second wiring passes through the opening and is disposed directly above the plate body.

[0028] According to the invention of (3) described above, the risk of the wiring being burned out due to thermal runaway of the battery module can be suppressed using the non-combustible plate body, and the wiring can be disposed directly above the battery module. Therefore, the degree of freedom of the wiring is improved.

[0029] (4) The battery pack according to (3) described above, wherein the first wiring and the second wiring are ground wires connected to the ground side in a circuit of the control device,

[0030] The first wiring is connected to a first ground terminal positioned on the plate body through the opening,

[0031] The second wiring is connected to a second ground terminal positioned closer to the bottom than the plate body.

[0032] According to the invention of (4) described above, the risk of the first wiring being burned out accompanying thermal runaway of the battery module can be suppressed using the non-combustible plate body, and the first ground terminal can be disposed directly above the battery module. Therefore, the degree of freedom of the ground terminal disposition is improved.

[0033] (5) The battery pack according to (3) described above, wherein the first wiring and the second wiring are positive-side wiring in communication wiring that transmits an electric signal, or positive-side wiring in power supply wiring that supplies power to the control device,

[0034] The first wiring extends from the control device to the first direction closer to the bottom than the plate body and is connected to a terminal positioned closer to the first direction side than the first battery module.

[0035] The aforementioned plate body has a first opening and a second opening located closer to the aforementioned second direction side than the aforementioned first opening as the aforementioned opening,

[0036] The aforementioned second wiring extends in the aforementioned first direction above the aforementioned plate body through the aforementioned second opening, and is connected to the terminal located closer to the aforementioned first direction side than the aforementioned first battery module through the aforementioned first opening.

[0037] According to the aforementioned (5), it is possible to concentrate both the terminal with respect to the first battery module and the terminal with respect to the second battery module closer to the first direction side than the first battery module. Also, since the second wiring extends in the first direction above the non-combustible plate body and reaches the terminal, the risk of the second wiring burning out due to thermal runaway of the battery module is suppressed by the plate body.

[0038] (EFFECT OF THE INVENTION)

[0039] As described above, according to the present application, the control device can more reliably perform communication necessary for a fail-safe operation with an external device compared to a case where only one of the first wiring and the second wiring is present. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 A side view illustrating the configuration of the battery pack of the first embodiment is shown.

[0041] Figure 2 A perspective view illustrating the battery pack is shown.

[0042] Figure 3 A perspective view illustrating the battery pack from which the cover is removed is shown.

[0043] Figure 4 A plan view illustrating the battery pack from which the cover is removed is shown.

[0044] Figure 5 A cross-sectional view illustrating the battery pack of Example 1 as viewed in the front direction at the position of line V-V is shown. Figure 4

[0045] Figure 6 A plan view illustrating the battery pack of the comparative example from which the cover is removed is shown.

[0046] Figure 7 A plan view illustrating the battery pack of the second embodiment from which the cover is removed is shown. DETAILED DESCRIPTION

[0047] Hereinafter, embodiments of the present application will be described with reference to the drawings. The present application is not limited to the following embodiments, and the embodiments can be appropriately changed without departing from the gist of the present application.​

[0048] [First Embodiment]

[0049] Figure 1 A side view illustrating the configuration of the battery pack 96 of the first embodiment is shown. The battery pack 96 is used for vehicle mounting, and is equipped under the rear seat 95 of the vehicle 90. Hereinafter, the front side in the vehicle longitudinal direction is referred to as "front Fr", and the opposite direction thereof is referred to as "rear Re".

[0050] Figure 2 A perspective view of the battery pack 96 is shown. Hereinafter, one side in the vehicle width direction is referred to as "first direction Dl", and the opposite direction thereof is referred to as "second direction D2". The battery pack 96 has a lower case 20 and an upper case 10 mounted on the upper surface of the front portion of the lower case 20, as a housing body which houses the contents.

[0051] The upper case 10 has a plate body 15 which is plate-shaped and extends in the horizontal direction, and a plate cover 11 mounted on the upper surface of the plate body 15. The plate cover 11 is box-shaped with the lower side opened.

[0052] The lower case 20 has a case main body 25 which is box-shaped with the upper side opened, and a case cover 21 mounted on the upper end of the case main body 25. The case cover 21 is plate-shaped which extends in the horizontal direction. The plate body 15 is fixed to the upper surface of the front portion of the case cover 21. A recessed portion 26 which is recessed upward and extends in the vehicle longitudinal direction Fr, Re is formed on the lower surface of the case main body 25. An exhaust pipe of the vehicle 90 (HEV) is equipped on the inner side of this recessed portion 26.

[0053] The plate cover 11, the plate body 15, the case cover 21, and the case main body 25 are each metal or the like, and have non-flammability. Hereinafter, the plate cover 11 and the case cover 21 are collectively referred to as "cover bodies 11, 21".

[0054] Figure 3 A perspective view in which the cover bodies 11, 21 are omitted so that the inside of the battery pack 96 can be observed is shown. The battery pack 96 has a plurality of battery modules 30 and a control device 40 which controls them.

[0055] The battery modules 30 are each present in the lower case 20 and in the upper case 10. Hereinafter, the battery module 30 which is arranged on the front side of the first direction Dl of the control device 40 in the case main body 25 is referred to as "first battery module 301", and the battery module 30 which is arranged on the front side of the second direction D2 of the control device 40 in the case main body 25 is referred to as "second battery module 302".

[0056] Each battery module 30 has a plurality of battery cells 33 and has a monitoring device that monitors the battery cells 33. Each battery cell 33 is a lithium ion battery or the like. The control device 40 controls each battery module 30 based on information from the monitoring device. In addition, when a temperature that is considered to be thermal runaway is detected by a temperature sensor (omitted from the drawing) provided in the battery pack 96 (at the time of thermal runaway), the control device 40 transmits a signal for executing a prescribed fail-safe operation to an external device such as a higher-level ECU, the signal being, for example, to block air from entering the inside of the battery pack 96 and to depressurize the inside of the battery pack 96.

[0057] Next, the wiring with respect to the control device 40 will be described. The battery pack 96 has a power supply wiring and a communication wiring. The power supply wiring is wiring for supplying power to the control device 40 from an auxiliary battery whose output power is smaller than the battery pack 96. The communication wiring is wiring for transmitting electrical signals to communicate between the control device 40 and an external device, for example, to constitute a part of a Controller Area Network (CAN).

[0058] The power supply wiring is constituted by a power supply line Lp as a positive side wiring and ground lines Lgl, Lg2 as negative side wirings. On the other hand, the communication wiring is constituted by a signal line Ls as a positive side wiring and the ground lines Lgl, Lg2 as negative side wirings. That is, the ground lines Lgl, Lg2 constitute the negative side of the power supply wiring and constitute the negative side of the communication wiring. The ground lines Lgl, Lg2 are connected to the ground side in the circuit of the control device 40.

[0059] The ground lines Lgl, Lg2 are of a redundant constitution having a first ground line Lgl as a first wiring and a second ground line Lg2 as a second wiring. That is, the first ground line Lgl and the second ground line Lg2 have the same function (ground function) to each other in the communication required for the fail-safe operation so that the communication can continue using only the other even if one is missing.

[0060] Figure 4 is a plan view of the battery pack 96 with the covers 11, 21 omitted. In the present embodiment, the plate body 15 is provided directly above the battery module 30 that is different from both the first battery module 301 and the second battery module 302. Here, the plate body 15 can also be provided directly above the first battery module 301 or the second battery module 302. The case main body 25 has the power supply terminal P and the signal terminal S on the first direction Dl side closer than the first battery module 301.

[0061] The control device 40 has a connection portion 42 to electrically connect each of the wires. The power supply line Lp extends from the connection portion 42 in the first direction Dl and passes above the first battery module 301, and then is connected to the power supply terminal P. The power supply line Lp has a heat-resistant structure such as a heat-resistant cover so as not to be burnt even if the first battery module 301 is in thermal runaway. The power supply terminal P is electrically connected to the positive terminal of the auxiliary battery described above.

[0062] The signal line Ls extends from the connection portion 42 in the first direction Dl and passes above the first battery module 301, and then is connected to the signal terminal S. The signal line Ls is the same as the power supply line Lp and has a heat-resistant structure. The signal terminal S is electrically connected to the positive terminal for communication with an external device such as the upper ECU.

[0063] The case main body 25 has a second ground terminal G2 closer to the second direction D2 than the second battery module 302. The second ground line Lg2 extends from the connection portion 42 in the second direction D2 and passes above the second battery module 302, and then is connected to the second ground terminal G2. The second ground line Lg2 does not have a heat-resistant structure as the power supply line Lp and the signal line Ls have. The second ground terminal G2 is electrically connected to the vehicle body of the vehicle 90 or the like.

[0064] The plate body 15 has an opening 16 that penetrates in the up-down direction at the end portion on the first direction Dl side, and has a first ground terminal G1 at the central portion in the first and second directions Dl, D2 (vehicle width direction). The case cover 21 (omitted from the drawing in Figure 4 Hereinafter, the opening 16 of the plate body 15 and the opening of the case cover 21 will be collectively referred to as "the opening 16 or the like".

[0065] The first ground line Lgl extends from the connection portion 42, passes above the first battery module 301, and passes through the opening 16 or the like from the bottom to the top, and then passes above the plate body 15 and is connected to the first ground terminal G1. The first ground line Lgl is the same as the second ground line Lg2 and does not have a heat-resistant structure. The first ground terminal G1 is the same as the second ground terminal G2 and is electrically connected to the vehicle body of the vehicle 90 or the like.

[0066] The first ground line Lgl has a connector C in the vicinity of the opening 16. With this connector C, the first ground line Lgl can be separated in the length direction. Therefore, when the upper case 10 is detached from the lower case 20, the first ground line Lgl can be handled by being separated in the length direction by the connector C. Also, when the upper case 10 is attached to the lower case 20, the first ground lines Lgl separated at the portion of the connector C are connected to each other.

[0067] Figure 5 is a view of the front Fr when viewed from the position of the V-V lineFigure 4 A cross-sectional view of the battery pack 96. As previously described, a recess 26 is formed on the lower surface of the housing body 25. Using this recess 26, a ridge protruding upward and extending in the vehicle length direction Fr,Re is formed on the bottom surface of the housing body 25. A terminal block 50 or the like is provided directly above this ridge, and a control device 40 is provided directly above it. Thus, at least a portion of the control device 40 is located closer to the upper end than the upper end of the first battery module 301 and the second battery module 302. Specifically, in this embodiment, the entire control device 40 is located closer to the upper end than the upper end of the first battery module 301 and the upper end of the second battery module 302. Thus, the first ground wire Lg1 is connected to the connection part 42 closer to the upper end than the upper end of the first battery module 301, and the second ground wire Lg2 is connected to the connection part 42 closer to the upper end than the upper end of the second battery module 302.

[0068] Figure 6 A plan view of a comparative example battery pack is shown, in which the first ground wire Lg1 is removed from the battery pack 96 of this embodiment. That is, the comparative example battery pack only has the second ground wire Lg2 as described in this embodiment as the ground wire Lg. Hereinafter, the effects of this embodiment will be explained based on a comparison with this comparative example.

[0069] exist Figure 6 In the comparative example shown, when the second battery module 302 experiences thermal runaway, the ground wire Lg (Lg2) may be burned out. Due to this burnout, the control device 40 cannot communicate with external devices and therefore cannot perform fail-safe operations.

[0070] In this respect, according to Figure 4 In the embodiment shown, even if the second battery module 302 experiences thermal runaway and the second ground wire Lg2 is burned out, the first ground wire Lg1 still exists. Furthermore, even if the first battery module 301 experiences thermal runaway and the first ground wire Lg1 is burned out, the second ground wire Lg2 still exists. Additionally, the power line Lp and signal line Ls still exist at this time due to their heat-resistant structure.

[0071] Therefore, compared to the comparative example, the control device 40 has a lower risk of being unable to communicate with external devices and can perform fail-safe operation more reliably. Furthermore, the ground wires Lg1 and Lg2 do not require the heat-resistant structures found in power lines Lp and signal lines Ls, thus reducing cost and weight.

[0072] Furthermore, according to this embodiment, such as Figure 5As shown, the first ground wire Lgl is connected to the connection portion 42 at a position closer to the upper side than the upper end of the first battery module 301, and the second ground wire Lg2 is connected to the connection portion 42 at a position closer to the upper side than the upper end of the second battery module 302. Thus, the connection of the first ground wire Lgl and the second ground wire Lg2 to the connection portion 42 becomes easy.

[0073] In addition, according to the present embodiment, the first ground wire Lgl is provided on the plate body 15 and connected to the first ground terminal Gl provided on the plate body 15. Thus, it is possible to suppress the risk of the first ground wire Lgl being burned out due to thermal runaway of the battery module 30 by the plate body 15, and it is possible to provide the first ground wire Lgl and the first ground terminal Gl above the battery module 30. Thus, the degree of freedom of the arrangement of the first ground wire Lgl and the first ground terminal Gl is increased.

[0074] [Second Embodiment]

[0075] Next, the second embodiment will be described. For the present embodiment, the first embodiment is taken as a basis and the description will be made focusing on aspects different from the first embodiment, and the description will be appropriately omitted for aspects common or similar to the first embodiment.

[0076] Figure 7 A plan view of the battery pack 96 of the second embodiment in which the cover bodies 11, 21 are omitted is illustrated. In addition, for the ground wires Lgl, Lg2, the same as the first embodiment, and thus, the illustration of the central portions in the lengthwise direction of the ground wires Lgl, Lg2 is omitted in Figure 7 In the present embodiment, in addition to the ground wires Lgl, Lg2, the signal wires Lsl, Ls2 and the power supply wires Lpl, Lp2 also have a redundant structure having a first wire and a second wire.

[0077] That is, the battery pack 96 has a second signal wire Ls2 in addition to the signal wire Ls, that is, the first signal wire Lsl described in the first embodiment. That is, the first signal wire Lsl and the second signal wire Ls2 have the same function (positive side function of the communication wire) in the communication required for the fail-safe operation, and even if one is missing, it is possible to continue the communication using only the other. The first signal wire Lsl and the second signal wire Ls2 do not have a heat-resistant structure.

[0078] In addition, the battery pack 96 has a second power supply line Lp2 in addition to the power supply line Lp, i.e., the first power supply line Lpl, described in the first embodiment. That is, the first power supply line Lpl and the second power supply line Lp2 have the same function (positive side function of the power supply wiring) in communication required for fail-safe operation, and even if one is missing, the other can be used to continue the communication. The first power supply line Lpl and the second power supply line Lp2 do not have a heat-resistant structure. Hereinafter, each of the second wirings of the second signal line Ls2 and the second power supply line Lp2 will be simply referred to as "each second wiring Ls2, Lp2".

[0079] The plate body 15 has a second opening 162 in addition to the opening 16, i.e., the first opening 161, described in the first embodiment. The second opening 162 penetrates the plate body 15 in the up-down direction at the end on the second direction D2 side of the plate body 15. The housing cover 21 Figure 7 (not illustrated in the figure) has an opening directly below the first opening 161 and an opening directly below the second opening 162, respectively. Hereinafter, the first opening 161 and the opening of the housing cover 21 directly below it will be collectively referred to as "the first opening 161 or the like", and the second opening 162 and the opening of the housing cover 21 directly below it will be collectively referred to as "the second opening 162 or the like".

[0080] Each second wiring Ls2, Lp2 extends from the connection portion 42 toward the second direction D2, passes directly above the second battery module 302, and then passes through the second opening 162 or the like from below to above, extends toward the first direction Dl from the plate body 15 on the upper side, and passes through the first opening 161 or the like from above to below. The end of the second signal line Ls2 and the end of the first signal line Lsl are commonly connected to the signal terminal S, and the end of the second power supply line Lp2 and the end of the first power supply line Lpl are commonly connected to the power supply terminal P.

[0081] Each second wiring Ls2, Lp2 has a first connector Cl in the vicinity of the first opening 161, and a second connector C2 in the vicinity of the second opening 162. With these two connectors Cl, C2, each second wiring Ls2, Lp2 can be separated into three in the length direction, respectively. Therefore, when the upper housing 10 is detached from the lower housing 20, each second wiring Ls2, Lp2 can be handled by being separated into three in the length direction by the two connectors Cl, C2, respectively. In addition, when the upper housing 10 is mounted on the lower housing 20, each second wiring Ls2, Lp2 separated into three can be handled by being connected by the two connectors Cl, C2.

[0082] According to the present embodiment, the first signal line Ls1 and the second signal line Ls2 can be connected to one signal terminal S located on the first direction D1 side closer than the first battery module 301, and the first power supply line Lp1 and the second power supply line Lp2 can be connected to one power supply terminal P located on the first direction D1 side closer than the first battery module 301. Also, each of the second wiring lines Ls2, Lp2 extends above the non-combustible plate body 15 toward the first direction D1 and reaches the signal terminal S and the power supply terminal P, and thus the risk of each of the second wiring lines Ls2, Lp2 being burned out due to thermal runaway of the battery module 30 is suppressed by the plate body 15.

[0083] [Other Embodiments]

[0084] The above embodiments can be modified, for example, as follows.

[0085] In the second embodiment, for any one or two of the ground line, the signal line, and the power supply line, a heat-resistant structure can be provided instead of a redundant configuration. In other words, for any one or two of the ground line, the signal line, and the power supply line, a heat-resistant structure can be provided instead of a redundant configuration.

[0086] The recess 26 can be a recess for providing a pipe or a shaft other than the exhaust pipe, and the case main body 25 can not have the recess 26.

[0087] The battery pack 96 can be vertically stacked. That is, the first direction D1 and the second direction D2 can not be the vehicle width direction but the vehicle length direction.

[0088] Reference Signs

[0089] 15: Plate body

[0090] 16: Opening

[0091] 161: First opening

[0092] 162: Second opening

[0093] 26: Recess

[0094] 30: Battery module

[0095] 301: First battery module

[0096] 302: Second battery module

[0097] 40: Control device

[0098] 90: Vehicle

[0099] 96: Battery pack

[0100] D1: first direction

[0101] D2: second direction

[0102] Lg1: first ground line (first wiring)

[0103] Lg2: second ground line (second wiring)

[0104] Ls1: first signal line (first wiring)

[0105] Ls2: second signal line (second wiring)

[0106] Lp1: first power supply line (first wiring)

[0107] Lp2: second power supply line (second wiring)

Claims

1. A battery pack for a vehicle, equipped in a vehicle, comprising: a control device for performing communication required for a fail-safe operation between an external device located outside the battery pack when thermal runaway occurs in the battery pack; a first battery module disposed in the battery pack closer to a first direction side than the control device; a second battery module disposed in the battery pack closer to a second direction side opposite to the first direction than the control device; a first wiring extending from the control device toward the first direction, passing above the first battery module; and a second wiring extending from the control device toward the second direction, passing above the second battery module, having the same function as the first wiring in the communication, and by the first wiring and the second wiring, redundancy of the function in the communication is ensured.

2. The battery pack according to claim 1, wherein the first direction and the second direction are a vehicle width direction of the vehicle, the battery pack has an accommodation body that accommodates the control device, the first battery module, the second battery module, the first wiring, and the second wiring, the accommodation body has a recessed portion recessed upward and extending in a vehicle length direction of the vehicle, the control device is located above the recessed portion, at least a part of the control device is located closer to an upper side than upper ends of the first battery module and the second battery module, the first wiring is connected to the control device closer to the upper side than the upper end of the first battery module, and the second wiring is connected to the control device closer to the upper side than the upper end of the second battery module.

3. The battery pack according to claim 1 or 2, comprising a non-combustible plate body extending in a horizontal direction above the battery modules, the plate body has an opening passing through in an up-down direction, and at least one of the first wiring and the second wiring passes through the opening and is disposed above the plate body.

4. The battery pack according to claim 3, wherein the first wiring and the second wiring are ground lines in a circuit connected to the control device, the first wiring is connected to a first ground terminal located on the plate body through the opening, and the second wiring is connected to a second ground terminal located closer to a lower side than the plate body.

5. The battery pack according to claim 3, wherein the first wiring and the second wiring are positive side lines in a communication wiring that transmits an electric signal or a power supply wiring that supplies power to the control device, the first wiring extends from the control device toward the first direction closer to the lower side than the plate body and is connected to a terminal located closer to the first direction side than the first battery module, the plate body has a first opening and a second opening located closer to the second direction side than the first opening as the opening, and the second wiring extends from the control device toward the second direction closer to the lower side than the plate body and is connected to the terminal located closer to the second direction side than the second battery module. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The aforementioned second wiring extends in the aforementioned first direction from the aforementioned control device through the aforementioned second battery module, and connects to a terminal located closer to the aforementioned first direction side than the aforementioned second battery module.

6. A vehicular battery pack equipped on a vehicle, comprising: a control device for communication required for a fail-safe operation between the control device and an external device located outside the battery pack when thermal runaway occurs in the battery pack; a first battery module disposed in the battery pack closer to a first direction side than the control device; a second battery module disposed in the battery pack closer to a second direction opposite to the first direction than the control device; first wiring extending from the control device in the first direction and passing above the first battery module; second wiring extending from the control device in the second direction and passing above the second battery module, having the same function as the first wiring in the communication; and a non-combustible plate extending in a horizontal direction above the battery modules, the plate has an opening passing through in an up-down direction, the first wiring and the second wiring are ground lines connected to a ground side in a circuit of the control device, the first wiring connects to a first ground terminal located above the plate through the opening, the second wiring connects to a second ground terminal located closer to a lower side than the plate.

7. A vehicular battery pack equipped on a vehicle, comprising: a control device for communication required for a fail-safe operation between the control device and an external device located outside the battery pack when thermal runaway occurs in the battery pack; a first battery module disposed in the battery pack closer to a first direction side than the control device; a second battery module disposed in the battery pack closer to a second direction opposite to the first direction than the control device; first wiring extending from the control device in the first direction and passing above the first battery module; second wiring extending from the control device in the second direction and passing above the second battery module, having the same function as the first wiring in the communication; and a non-combustible plate extending in a horizontal direction above the battery modules, the plate has an opening passing through in an up-down direction, the first wiring and the second wiring are positive side wiring in communication wiring that transmits an electric signal, or positive side wiring in power supply wiring that supplies power to the control device, the first wiring extends from the control device in the first direction closer to a lower side than the plate, and connects to a terminal located closer to the first direction side than the first battery module, the plate has a first opening and a second opening located closer to the second direction side than the first opening as the opening, The aforementioned second wiring extends in the aforementioned first direction toward the front surface of the aforementioned board through the aforementioned second opening, and is connected to a terminal located closer to the aforementioned first direction side than the aforementioned first battery module through the aforementioned first opening. The aforementioned second wiring extends in the aforementioned first direction toward the front surface of the aforementioned board through the aforementioned second opening, and is connected to a terminal located closer to the aforementioned first direction side than the aforementioned first battery module through the aforementioned first opening.

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