WO2018062226A1

WO2018062226A1 - Battery module, and battery pack

Info

Publication number: WO2018062226A1
Application number: PCT/JP2017/034859
Authority: WO
Inventors: 貴支鈴木; 元靖小池; 倫弘木村; 斉藤　豊
Original assignee: 日立オートモティブシステムズ株式会社
Priority date: 2016-09-30
Filing date: 2017-09-27
Publication date: 2018-04-05
Also published as: JPWO2018062226A1; JP6715942B2

Abstract

The purpose of the present invention is to facilitate the mounting if battery modules at a high density within an in-vehicle space having a low height, and to improve the operability of the electrical connections after mounting in the in-vehicle space. Provided is a battery module in which the outer terminal surfaces of polygonal battery cells face sideways, the battery module being characterized in that outer terminal surfaces of the polygonal battery cells and terminal surfaces for electrically connecting battery modules to each other (battery module terminal surfaces) are made to protrude in different directions.

Description

Battery module and battery pack

The present invention mainly relates to a battery module including a plurality of rectangular secondary battery cells used as a power source for a hybrid vehicle or an electric vehicle using a motor as a drive source, and a battery pack.

Battery modules used as power sources for hybrid vehicles and electric vehicles (hereinafter collectively referred to as battery modules, battery modules, and battery packs) have excellent energy density in order to increase capacity in limited vehicle space. A rectangular battery cell may be used. While the prismatic battery cell itself is required to be downsized, the battery module is also required to be downsized.

As an arrangement structure in a battery module using a rectangular battery cell in which a positive electrode external terminal and a negative electrode external terminal for inputting and outputting a voltage are arranged on the same surface, for example, Patent Document 1 discloses that the external terminal surface is aligned, An arrangement structure is disclosed in which the wide side threading faces and overlaps. As another example, Patent Document 2 discloses an arrangement structure in which a narrow side surface of a rectangular battery cell is faced.

JP 2011-23302 A JP 2001-307784 A

The battery module described in Patent Document 1 has a height dimension (a dimension indicating a distance from a surface on which the external terminal of the rectangular battery cell is disposed to a surface facing the surface on which the external terminal is disposed as a height dimension. Is defined by the size of the rectangular battery cell, and it is difficult to mount in a low-profile vehicle space. This is obvious even if the battery module is rotated 90 degrees toward the narrow side surface of the rectangular battery cell.

As an arrangement structure of battery modules mounted in a low-profile vehicle-mounted space, a structure in which the number of rectangular battery cells constituting the battery module in Patent Document 1 is reduced and the external terminal surface faces sideways, or in addition, the narrow side surfaces face each other. A combined arrangement structure is effective.

However, the battery module with a lateral external terminal surface is obstructed to increase the capacity and density in the vehicle space due to the lateral wiring space in the module for electrical connection between the battery modules. There is a problem that workability of electrical connection between battery modules after the battery modules are arranged is poor.

The present invention has been made in view of the above points. The object of the present invention is to mount battery modules at a high density in a low-profile vehicle space and to provide an electrical circuit after being mounted in the vehicle space. It is to improve workability of electrical connection in connection.

The battery module of the present invention is a battery module in which the external terminal surface of the rectangular battery cell is directed sideways, and the external terminal surface of the rectangular battery cell and the terminal surface (battery module terminal surface) for electrical connection between the battery modules are projected. The direction is different.

According to the present invention, the wiring space in the lateral direction inside the modules for electrical connection between the battery modules is reduced, and at the same time, the workability of the electrical connection between the battery modules after the battery modules are arranged in the in-vehicle space. Can be improved. Problems, configurations, and effects other than those described above will be clarified by the following embodiments.

The external appearance perspective view of a battery cell. The external appearance perspective view of a battery laminated body. The exploded perspective view of a battery laminated body. The external perspective view of a bus-bar assembly. The exploded perspective view of a bus-bar assembly. The connection schematic diagram of a battery module. The exploded perspective view of a battery module. The exploded perspective view of a battery module. The external appearance perspective view of a battery module. The disassembled perspective view which shows the example in which the battery cell structure number difference of a battery module is shown. The disassembled perspective view which shows the example in which the battery cell structure number difference of a battery module is shown. The connection schematic diagram of a series type battery module. The disassembled perspective view of a series type battery module. The connection schematic diagram of a parallel type battery module. The disassembled perspective view of a parallel type battery module. The external appearance perspective view of a battery pack. The disassembled perspective view of an 8-cell battery module. The side view which paid its attention to cooling of an 8-cell battery module.

<< First Example >>
Hereinafter, embodiments of a battery module according to the present invention will be described with reference to the drawings. In the following description, the case where the battery module is used as a drive source for an electric vehicle or a hybrid electric vehicle will be described as an example. However, the application is not limited to the vehicle use.

(Battery cell)
FIG. 1 is an external perspective view of a battery cell.
The battery cell 1 is a square lithium ion secondary battery, and an electrode group having a positive electrode and a negative electrode is housed in an aluminum alloy battery container together with an electrolytic solution. The battery container of the battery cell 1 has a flat box type battery can 1a and a battery lid 1b that seals an opening of the battery can 1a. The battery can 1a is a flat rectangular container formed by deep drawing, and includes a rectangular bottom surface PB, a pair of wide side surfaces PW rising from the long side of the bottom surface PB, and a pair of widths rising from the short side surface of the bottom surface PB. It has a narrow side PN.

The battery lid 1b is composed of a rectangular flat plate member and has an upper surface PU. The battery lid 1b is provided with a positive external terminal 1c and a negative external terminal 1d for inputting and outputting voltage. The positive electrode external terminal 1c and the negative electrode external terminal 1d are arranged at positions separated from each other in the long side direction of the battery lid 1a. The positive external terminal 1c and the negative external terminal 1d project from the battery lid 1b on the upper surface PU side, and a nut fastening bolt 1g for fastening the bus bar is provided. The battery lid 1b accommodates the electrode group in the battery can 1a, and is then laser welded to the battery can 1a to seal the opening of the battery can 1a. A gas discharge valve 1e that is cleaved by an increase in internal pressure and discharges gas in the battery container is provided at an intermediate position in the long side direction of the battery lid 1b. The battery cell 1 is entirely covered with an insulating film 1f except for the positive electrode external terminal 1c, the negative electrode external terminal 1d, and the gas discharge valve 1e.

(Battery cell stack)
2 is an external perspective view of the battery cell laminate 2, and FIG. 3 is an exploded perspective view showing a state in which the battery cell laminate 2 is disassembled.
As shown in FIGS. 2 and 3, the battery cell laminate 2 is laminated in order from the bottom: the lower plate 3, the lower case 4, the battery cell 1, the center case 5, the battery cell 1, the upper case 6, and the upper plate 7. Is made up of.

In each of the plurality of battery cells 1, the positive electrode external terminal 1 c and the negative electrode external terminal 1 d are aligned on the same surface in the Y direction, and the wide side surface PW and the narrow side surface PN of the battery cell are arranged so as to face each other. 2 in the Z direction and 2 in the Z direction.

The lower case 4, the center case 5, and the upper case 6 are resin molded

products having spaces

4a, 5a, 6a so that the battery cell 1 is inserted and engaged about half in the Z direction, and are sandwiched in the Z direction. The battery cell 1 is covered except for the positive electrode external terminal 1c, the negative electrode external terminal 1d, and the gas discharge valve 1e, and functions as insulation and retention. Further,

openings

4b, 5b, and 6b are provided in positions corresponding to the wide side surface PW of the battery cell 1 in the lower case 4, the center case 5, and the upper case 6, respectively. The purpose of this is to insert a member for heat transfer of the battery cell 1, or to insert a space for heat insulation, or a member for heat insulation, or to escape the swelling of the wide side surface PW of the battery cell 1. Provided. It is not always necessary if these objectives are achieved.

The lower case 4 is provided with a flange 4c protruding in the X direction for fixing the battery module to the vehicle.

A sheet metal

part having flanges

3a and 7a projecting in the Z direction by the lower plate 3 and the upper plate 7 at both ends in the Z direction, sandwiching the entire battery cell stack 2, and welding the

flanges

3a and 7a at predetermined positions. Fix with etc.

The center case 5 is provided with a protrusion 5c for engaging another part.

According to the above, the battery that can be fixed to the vehicle while insulating and holding the plurality of battery cells 1, and the size in the Z direction is suppressed by making the narrow side surface PN of the battery cell 1 correspond to the Z direction. The laminate 2 can be provided.

(Bus bar assembly)
4 is an external perspective view of the bus bar assembly 8, and FIG. 5 is an exploded perspective view showing a state in which a part of the bus bar assembly 8 is disassembled.

The bus bar assembly 8 includes a bus bar base 9, a bus bar 10, and a harness 11 made of a resin member.

The bus bar base 9 is provided with a bus bar mounting structure (groove 9a1, hook 9a2) 9a corresponding to the bus bar 10, and the bus bar 10 is engaged therewith. The bus bar base 9 is provided with a harness groove 9b through which the harness 11 can be routed, and the harness 11 is aligned with the harness groove 9b. Further, the bus bar base 9 is provided with a connector fitting projection 9c, and the connector 11c for external output of the harness 11 is engaged. At both ends in the X direction, flanges 9d for engaging with the battery stack 2 are provided. Further, similarly to the flange 9d, protrusions 9e for connecting to a cover 14 described later are provided at both ends in the X direction. The bus bar base 9 is a resin molded product having the above functions and shapes and having insulating properties.

The bus bar 10 is a battery module terminal 10b provided with a Y-direction through hole 10a corresponding to the

external terminals

1c and 1d of the battery cell 1 and a terminal for electrical connection between the battery modules by bending toward the Z-direction surface. And have.

The harness 11 is a wiring component group in which a press contact terminal 11a, an electric wire 11b, and a connector 11c for external output are electrically connected to the bus bar 10 for electrical connection.

(Battery module)
6 is a schematic view focusing on the polarities of the

external terminals

1c and 1d of the battery cell 1 and the module output terminal of the battery module 12, and FIGS. 7 and 8 are exploded perspective views showing a state in which a part of the battery module 12 is disassembled. FIG. 9 is a perspective view showing a completed state of the battery module 12.

As shown in FIG. 6, the battery module 12 includes two lower battery cells 1 connected in series in the Z direction and two upper battery cells 1 connected in series. The module output terminal 10b (the positive module output terminal 10b1 and the negative module output terminal 10b2) is connected and output. The positive electrode module output terminal 10b1 and the negative electrode module output terminal 10b2 are preferably arranged close to each other in terms of assembly. At this time, the bus bar 10 connecting the external terminal of the lower battery cell 1 and the module output terminal 10b is formed so as to bypass the bus bar 10 connecting the external terminal of the upper battery cell 1 and the module terminal 10b.

As shown in FIG. 7, the positive electrode external terminal 1 c and the negative electrode external terminal 1 d of the battery stack 2 are connected to the bus bar through hole 10 c in the bus bar assembly 8, and the battery stack 2 is connected to the flange 9 d in the bus bar assembly 8. The bus bar assembly 8 is engaged with the battery stack 2 so that the protrusions 5c correspond to each other. At this time, the bolt 1 g of the battery cell 1 passes through the bus bar through hole 10 c provided in the bus bar assembly 8 and is connected to the bus bar 10 by the nut 13. In addition, when each bus bar 10 is connected to the bus bar 10, the press contact terminal 11 a of the harness 11 is disposed between the external connection terminal and the nut 13 and is electrically connected to the press contact terminal 11 a. .

And as shown in FIG. 8, the cover 14 which protects and insulates the

external terminals

1c and 1d of the battery cell 1 except the module output terminal 10b is attached. The cover 14 is fixed to the bus bar base 8 of the battery stack 2 by engaging, for example, a protrusion 9e provided on the bus bar base 9 and an engagement hole 14a on the cover 14 side. Features of the present invention will be described with reference to FIG. In the present embodiment, the surface on which the external terminals (positive external terminal 1c, negative external terminal 1d) of the battery cell are arranged and the surface on which the module output terminals (positive module output terminal 10b1, negative module output terminal 10b2) are arranged. They are different from each other. Specifically, the external terminals (the positive external terminal 1c and the negative external terminal 1d) are connected to the module output terminals (the positive module output terminal 10b1 and the negative module output terminal) on the side surface side (surface side arranged in the Y direction) of the battery module. 10b2) is provided on the upper surface (surface side arranged in the Z direction) of the battery module 12, that is, the surface on which the wide surface of the battery cell 1 is arranged. In particular, the module output terminals (positive module output terminal 10b1, negative module output terminal 10b2) are arranged on the surface side of the battery module on which the wide surface of the battery cell 1 is arranged as in the present invention, so that the module is stable on a large surface. It becomes possible to connect the output terminal 10b and other devices, and the assemblability is improved.

In the present invention, the bus bar 10 and the harness 11 are configured to be routed from the battery module side surface (surface arranged in the Y direction) to the upper surface of the battery module 12 (surface arranged in the Z direction). With such a configuration, the wiring space on the side surface of the battery module 12 is reduced, and at the same time, the module output terminal is arranged on the upper surface of the battery module 12. Therefore, when the battery module 12 is arranged in the in-vehicle space, The workability of electrical connection between battery modules can be improved.

In the present invention, the module output terminals (the positive module output terminal 10b1 and the negative module output terminal 10b2) and the harness connector 11c are collected on the upper surface of the battery module 12. With such a configuration, the workability of the connection between the module output terminal 10b and another device is improved.

In the present invention, the positive module output terminal 10b1 and the negative module output terminal 10b2 are arranged close to each other. With such a configuration, the connecting work of the positive and negative module output terminals can be performed collectively, so that the assemblability is improved.

Further, in the present invention, two battery cells stacked in the Z direction are defined as a first battery group and a second battery group, respectively. At this time, the positive electrode module output terminal 10b1 and the negative electrode module output terminal 10b2 are arranged on the first battery group and the second battery group, respectively. With such a configuration, a space is provided on the upper surface portion, and the connector 11c of the harness is disposed between the two sets of module output terminals so that all the external connection portions can be integrated on the upper surface of the battery module 12.

In the present invention, the bus bar 10 from the lower battery cell 1 is extended between the positive external terminal 1c and the negative external terminal 1d. With this configuration, the bus bar wiring can be routed along the shortest path, and as a result, the wiring space on the side surface of the battery module 12 can be reduced.

In the present invention, the bus bar base 9 is disposed between the bus bar 10 and the battery cell 1. With such a configuration, it is possible to ensure insulation between the battery cell 1 and the bus bar 10 when the bus bar 10 is routed over the battery cell 1.

Subsequently, modified examples of the present invention will be described. 10 and 11 show modifications of the present invention, in which the number of battery cells constituting the battery module 12 is changed and the arrangement direction is changed. FIG. 10 shows two battery cells 1 arranged in the X direction. In the case of this configuration, the positive electrode module output terminal 10b1 and the negative electrode module output terminal 10b2 are not collected from each other, but are arranged in the opposite direction on the X direction.

FIG. 11 shows two battery cells 1 arranged in the Z direction. In the case of this structure, the configuration is almost the same as that of the first embodiment, except that the number of cells is different. Although the space between the module output terminals 10b is reduced, the connector 11c of the harness 11 is arranged in the space between the module output terminals 10b as in the first embodiment.

As described above, when the modified examples are summarized, the number of cells and the way of arranging the cells can be changed without departing from the scope of the claims of the present invention. Further, the number of battery cells constituting the battery module can be changed in three directions.

<< Second Example >>
Next, a second embodiment will be described. In the first embodiment, two sets of module output terminals 10b are provided in a parallel battery module, but in this embodiment, the module output terminals 10b are configured as a set of series battery modules. This point is different from the first embodiment.

FIG. 12 is a schematic view focusing on the polarities of the

external terminals

1c and 1d of the battery cell 1 and the module output terminal in the battery module 15 of the second embodiment (hereinafter referred to as the series battery module 15). 4 is an exploded perspective view showing a state in which a part of the series battery module 15 is disassembled. FIG.

As shown in FIGS. 12 and 13, the series battery module 15 is connected to the positive module output terminal 10b1 and the negative module output terminal 10b2 after four battery cells 1 are connected in series. In this example, two battery cells stacked in the Z direction were used as the first battery group and the second battery group, respectively. At this time, the positive electrode module output terminal 10b1 and the negative electrode module output terminal 10b2 are arranged on one side of the first battery group and the second battery group. With such a configuration, the harness connector 11c can be disposed between a set of module output terminals, and all external connection portions can be concentrated on the upper surface of the series battery module 15.

<Third embodiment>
Next, a third embodiment will be described. In the first embodiment, two sets of module output terminals 10b are provided in a parallel battery module, but in this embodiment, one positive module output terminal 10b1 and one negative module output terminal 10b2 are provided in a parallel battery module. The two battery groups are common. This point is different from the first embodiment.

FIG. 14 is a schematic diagram focusing on the polarities of the

external terminals

1c and 1d of the battery cell 1 and the module output terminal in the battery module 16 of other Example 2 (hereinafter referred to as a parallel battery module 16), and FIG. 4 is an exploded perspective view showing a state in which a part of the parallel battery module 16 is disassembled. FIG.

As shown in FIGS. 14 and 15, the parallel battery module 16 is divided into two battery groups, an upper battery group in the Z direction and a lower battery group in the Z direction, and the battery cell 1 on the lower side in the Z direction. Are connected in series, and the two upper battery cells 1 are connected in series. At this time, the upper and lower positive and negative electrodes are connected in parallel, and the two battery groups of the upper battery group and the lower battery group are connected to the two terminals of the positive electrode module output terminal 10b1 and the negative electrode module terminal 10b2, respectively. In this embodiment, by adopting such a configuration, the module output terminals 10b can be reduced as compared with the first embodiment, and the battery module can be reduced in size and price.

In addition, according to the 1st Example, the 2nd Example, and the 3rd Example, the battery module of a serial connection and a parallel connection can be provided by changing the arrangement of a connection.

<< Fourth embodiment >>
Next, a fourth embodiment will be described. In this embodiment, the two battery modules used in the first embodiment are combined into one.

FIG. 16 is a perspective view of the battery pack 17 (a plurality of battery modules in one set) according to the present embodiment, FIG. 17 is an exploded perspective view showing a partially exploded state of the battery pack 17, and FIG. 18 is for cooling. It is the side view of the X direction which displayed only the battery cell 1, the heat conductive member 18, and the cooling component 19 paying attention.

As shown in FIG. 16 and FIG. 17, the battery pack 17 is configured such that two battery modules 12 (eight battery cells 1) are consolidated into one so that the battery cell 1 bottom surface PB of the battery module 12 faces each other. It is a thing.

As shown in FIGS. 17 and 18, a heat conductive member 18 is disposed on the bottom surface PB of the battery cell 1, and the battery cell 1 and the cooling component 19 are thermally connected via the heat conductive member 18.

The heat conducting member 18 is, for example, a sheet, rubber, adhesive or the like having good heat conductivity.

The cooling component 19 is, for example, a component having a function of circulating a coolant through a metal component such as aluminum having good thermal conductivity. The cooling component 19 of the present embodiment shows a state in which a pipe 19a is connected as an example of circulating the refrigerant. FIG. 18 will be described in a little more detail. FIG. 18 is a view in which only the battery cell 1, the heat conduction member 18, and the cooling component 19 are extracted by cutting along the AA section of FIG. In this embodiment, each battery cell 1 can use both one wide surface PW that radiates heat to the outside and the bottom surface PB in contact with the cooling component 19 for cooling. That is, the battery cell 1 can dissipate heat from both the wide surface PW and the cooling component 19 by adopting the structure as in the present embodiment. Therefore, it is possible to provide the battery pack 17 having a very high cooling efficiency.

According to the above, a battery pack having a plurality of battery cells 1 and a battery pack having a cooling function can be provided.

The above is a summary of the present invention. The battery module 12 according to the present invention has positive and

negative cell terminals

1c and 1d on one surface, and further has a wide surface PW and a narrow surface PN different from the surface on which the positive and negative

electrode cell terminals

1c and 1d are arranged. A battery group including a battery group in which the wide surfaces of the battery 1 are opposed to each other and stacked vertically, and positive and negative electrode module terminals 10b1 and 10b2 connected to the positive and negative

electrode cell terminals

1c and 1d via wirings 10, respectively. The surface on which the

terminals

1c and 1d are arranged is different from the surface on which the positive and negative electrode module terminals 10b1 and 10b2 are arranged, and the positive and negative electrode module terminals 10b1 and 10b2 are arranged on the wide surface side PW. By adopting such a structure, it becomes possible to connect the module output terminal 10b to another device on a stable large surface, and the assemblability is improved.

In the battery module 12 according to the present invention, the wiring 10 is disposed between the positive cell terminal 1c and the negative cell terminal 1d. With this configuration, the bus bar wiring can be routed along the shortest path, and as a result, the wiring space on the side surface of the battery module 12 can be reduced.

In the battery module 12 according to the present invention, the wiring is the bus bar 10, and the insulating member 9 is disposed between the bus bar 10 and the rectangular battery 1. With such a structure, when the bus bar 10 is routed over the battery cell 1, insulation between the battery cell 1 and the bus bar 10 can be ensured.

Further, in the battery module 12 according to the present invention, there are a plurality of battery groups, and the narrow surfaces of the square batteries of the battery group are arranged to face each other, and the positive and negative electrode module terminals 10b1 and 10b2 are one battery group. It is arranged on the side. With such a configuration, the module output terminals 10b can be reduced as compared with the first embodiment, and the battery module can be reduced in size and price.

Further, in the battery module 12 according to the present invention, there are a plurality of battery groups, and the narrow surfaces of the square batteries of the battery group are arranged to face each other, and the positive electrode module terminal 10b1 and the negative electrode module terminal 10b2 are respectively Arranged on another battery group. A space is provided on the upper surface portion, and the harness connector 11c is disposed between the two sets of module output terminals, so that all external connection portions can be integrated on the upper surface of the battery module 12.

Moreover, in the battery pack 17 in which a plurality of battery modules 12 according to the present invention are arranged, the battery module 12 faces the surfaces of the battery module that face the surface on which the positive and

negative cell terminals

1c and 1d of the rectangular battery 1 are disposed. Arranged. With such a configuration, not only the wide surface PW of the battery cell 1 but also the bottom surface PB side can be used for cooling, so that the cooling efficiency is improved.

Further, in the battery pack 17 according to the present invention, a cooling channel 19 is provided between the battery modules 12. By adopting such a structure, the cooling efficiency can be further improved.

In the above embodiment, the bus bar 10 is used. However, it may be replaced with normal wiring.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. Furthermore, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 Battery cell 1a Battery can 1b Battery cover 1c Positive external terminal 1d Negative external terminal 1e Gas exhaust valve 1f Insulating film 2 Battery laminated body 3 Lower plate 3a Flange 4 Lower case 4a Space 4b Opening 4c Flange 5 Center case 5a Space 5b Opening 5c Projection 6 Upper case 6a Space 6b Opening 7 Upper plate 7a Flange 8 Bus bar assembly 9 Bus bar base 9a Bus bar mounting structure 9b Harness groove 9c Connector fitting projection 9d Flange 10 Bus bar 10a Through hole 10b Module output terminal 11 Harness 11a Pressure contact terminal 11b Electric wire 11c Connector 12 Battery Module 13 Nut 14 Cover 15 Series Battery Module 16 Parallel Battery Module 17 Battery Pack 18 Thermal Conductive Member 19 Cooling Component 19 a Pipe

Claims

A battery group having positive and negative electrode terminals on one side and stacked vertically with the wide surfaces of the rectangular batteries having a wide surface and a narrow surface different from the surface on which the positive and negative electrode cell terminals are disposed facing each other. When,
In a battery module comprising positive and negative electrode module terminals connected to each of the positive and negative electrode cell terminals via wiring,
The surface on which the positive and negative electrode cell terminals are arranged and the surface on which the positive and negative electrode module terminals are arranged are different surfaces,
The battery module, wherein the positive and negative electrode module terminals are arranged on the wide surface side.
The battery module according to claim 1,
The battery module, wherein the wiring is disposed between the positive cell terminal and the negative cell terminal.
The battery module according to claim 2,
The wiring is a bus bar;
An insulating member is disposed between the bus bar and the rectangular battery.
The battery module according to claim 3, wherein
There are a plurality of the battery groups, and the narrow surfaces of the rectangular batteries of the battery groups are arranged to face each other,
The battery module is characterized in that the positive and negative electrode module terminals are collectively arranged on one battery group side.
The battery module according to claim 1,
There are a plurality of the battery groups, and the narrow surfaces of the rectangular batteries of the battery groups are arranged to face each other,
The battery module, wherein the positive module terminal and the negative module terminal are arranged on different battery groups.
A battery pack in which a plurality of battery modules according to any one of claims 1 to 5 are arranged,
The said battery module is arrange | positioned so that the surface facing the surface where the said positive / negative cell terminal of the said square battery in the said battery module was arrange | positioned was made to oppose.
The battery pack according to claim 6, wherein
A battery pack, wherein a cooling channel is provided between the battery modules.