WO2013080338A1

WO2013080338A1 - Cell block and cell module having same

Info

Publication number: WO2013080338A1
Application number: PCT/JP2011/077700
Authority: WO
Inventors: 江尻　裕城; 直樹小島; 倫弘木村
Original assignee: 日立ビークルエナジー株式会社
Priority date: 2011-11-30
Filing date: 2011-11-30
Publication date: 2013-06-06

Abstract

The present invention addresses the problem of achieving a small, lightweight cell block (1) allowing relative positioning in the array direction of a plurality of battery cells in a simple configuration, and of obtaining a cell module (40, 50) using the cell block (1). The present invention is a cell block (1) in which a plurality of battery cells (2) are arrayed, the cell block (1) having a plurality of spacers (3) interposed between each pair of the plurality of battery cells (2), and bridge bars (4) extending in the array direction of the plurality of battery cells (2) and engaging with each of the plurality of spacers (3). The bridge bars (4) allow the plurality of spacers (3) to each be easily positioned and disposed in the array direction.

Description

Battery block and battery module having the same

The present invention relates to a battery block in which a plurality of battery cells are arranged and connected, and a battery module having the battery block.

A battery block in which a large number of battery cells are arranged and fixed in recent years has an end plate covered and fixed with a spacer interposed between the battery cells. The end plate is formed in a size that can cover the battery cells exposed at the end face, and is fixed by sandwiching a large number of these battery cells from both sides in the arrangement direction. For example, a technique has been proposed in which a pair of screw holes project from the side surface of the end plate and the end plates are fixed by screwing through extension bolts that extend to the side surface of the battery pack in which the battery cells are stacked (for example, Patent Document 1). reference).

JP 2008-186725 A

However, in the technique shown in Patent Document 1, since the end plates are simply sandwiched and fixed, when each battery cell expands due to charging / discharging, the difference in the degree of expansion of each battery cell causes each battery cell to expand. The relative position in the arrangement direction may change. Therefore, the dimensions of the bus bar or the like connecting the battery cells cannot be determined with high accuracy, and there is a concern about the influence on the assembly work of the cell block.

Moreover, in the technique shown in Patent Document 1, when there are a large number of adjacent battery cells, the length of the extension bolt that is sandwiched and fixed between the end plates is increased, the battery cells are easily moved, and the strength is increased. There is a risk of not being able to keep. Moreover, since the extension bolt is provided by projecting the side surface of the end plate, there is a problem that the entire battery block becomes large and heavy.

The present invention has been made in view of the above points, and the object of the present invention is to achieve a reduction in size and weight by relatively positioning a plurality of battery cells in the arrangement direction with a simple configuration. It is in providing the battery block which can be performed, and the battery module using this battery block.

The battery block of the present invention that solves the above problems is a battery block in which a plurality of battery cells are arranged, and a plurality of spacers interposed between the plurality of battery cells, respectively, and an arrangement of the plurality of battery cells It has a bridge bar extending along the direction and engaging with each of the plurality of spacers.

According to the battery block of the present invention, a plurality of spacers can be easily positioned and arranged in the arrangement direction by attaching bridge bars. Therefore, when each battery cell expands due to charging / discharging, the relative position in the arrangement direction of each battery cell can be prevented from changing due to the difference in expansion degree of each battery cell, and a plurality of battery cells are arranged. It can be positioned relative to the direction. Therefore, the dimensions of the bus bar and the like connecting the battery cells can be determined with high accuracy, and the assembly work of the cell block can be facilitated.

The external appearance perspective view of the battery block which the battery module concerning this Embodiment has. The perspective view which shows the state which decomposed | disassembled some battery blocks shown in FIG. The perspective view which shows the state which interposed the spacer between the some battery cells. The perspective view of a battery cell. The perspective view explaining the structure of a spacer and a battery cell. The disassembled perspective view of the spacer and battery cell shown in FIG. The schematic diagram which shows the fitting state of a spacer and a bridge bar in a cross section. The perspective view which shows the other Example of a battery block. The perspective view which shows one Example of the battery module using the battery block shown in FIG. The perspective view which shows the other Example of a battery module. The disassembled perspective view of the battery module shown in FIG. The figure explaining the flow of the cooling medium in the battery module shown in FIG.

Hereinafter, an embodiment of a battery module according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external perspective view of a battery block according to the present embodiment, and FIG. 2 is a perspective view showing a state in which a part of the battery block shown in FIG. 1 is disassembled.

The battery block 1 has a configuration in which a plurality of battery cells 2 are arranged, for example, as shown in FIG. A plurality of spacers 3 individually interposed between the plurality of battery cells 2 and a bridge bar 4 extending along the arrangement direction of the plurality of battery cells 2 and engaging with the plurality of spacers 3 are provided. Have.

Further, the battery block 1 is disposed at both ends in the arrangement direction of the plurality of battery cells 2 and interposed between the pair of

end plates

5 and 5 sandwiched from both sides in the arrangement direction, and a plurality of positions in the arrangement direction of the plurality of battery cells 2. The section plate 6 that partitions the battery cell 2 on one side and the other side in the arrangement direction, and is arranged along both ends of the cell width direction of the plurality of battery cells 2 and extends from one end to the other end in the arrangement direction. A pair of

end plates

5, 5 and a section plate 6 and a pair of connection plates 7 to which the bridge bar 4 is fixed are provided. On the upper side of each battery cell 2 in the cell height direction, a seal sheet 8 and an insulating cover 9 are respectively put on the section plate 6 as a boundary, and the substrate unit 10 is disposed on the insulating cover 9.

The plurality of battery cells 2 are arranged such that the positive electrode external terminals 2a and the negative electrode external terminals 2b are alternately continued along the arrangement direction, and the positive electrode external terminals 2a and the negative electrode external terminals 2b of the battery cells 2 adjacent to each other are arranged. Are connected to each other by a plurality of bus bars 11. Each bus bar 11 is connected to the connection terminal 10 a of the board unit 10. The board unit 10 includes a circuit for measuring the voltage of each battery cell 2, a fuse, and the like. A terminal cap 12 is provided on the upper side of the substrate unit 10 in the cell height direction to fit the insulating cover 9 and cover the terminals of the battery cells 2.

3 is a perspective view showing a state in which a spacer is interposed between a plurality of battery cells, FIG. 4 is a perspective view of the battery cell, FIG. 5 is a perspective view for explaining the configuration of the spacer and the battery cell, FIG. FIG. 7 is an exploded perspective view of the spacer and the battery cell shown in FIG. 5, and FIG. 7 is a schematic view showing a fitting state of the cell holder and the bridge bar in cross section.

The battery cells 2 are all lithium ion secondary batteries having the same configuration, and as shown in FIG. 4, are flat box-shaped prismatic batteries having a positive external terminal 2a and a negative external terminal 2b for inputting and outputting power. .

Although not described in detail, the battery cell 2 has a positive electrode composed of a positive electrode metal foil composed of a metal foil such as aluminum and a positive electrode mixture layer applied to the front and back surfaces of the positive electrode metal foil, copper, etc. A negative electrode metal foil composed of a metal thin film and a negative electrode composed of a negative electrode mixture layer applied to the front and back surfaces of the negative electrode metal foil, and a resin plate with a porous and insulating separator in between The electrode group is formed by winding it flatly around the core.

Then, the positive electrode tab protruding from the positive electrode is ultrasonically welded to the positive electrode current collector plate, the positive electrode current collector plate is connected to the positive electrode external terminal 2a, and the negative electrode tab protruding from the negative electrode is ultrasonically welded to the negative electrode current collector plate. The current collector is connected to the negative external terminal 2b. Both

external terminals

2a, 2b are provided with bus bar fastening bolts so that the bus bar 11 can be fixed with nuts. Moreover, the battery cell 2 accommodates the electrode group provided with the said positive electrode external terminal 2a and the negative electrode external terminal 2b in the flat square container 2c, and is sealed with the battery cover 2d. A liquid injection port 2e is formed in the battery lid 2d, and a nonaqueous electrolytic solution is injected into the rectangular container 2c from the liquid injection port 2e. The rectangular container 2c has a substantially rectangular bottom surface PB in plan view, a pair of wide side surfaces PW that are bent at a pair of long sides of the bottom surface PB, and a pair of surfaces that are bent at a pair of short sides of the bottom surface PB. And a narrow side surface PN.

The battery cell 2 thus configured is exposed to a high temperature environment, the electrode or separator is deteriorated, the external short circuit, the internal short circuit due to the change of the battery shape, the rapid temperature due to the forced overcurrent charging by the external power source When overcharge due to an increase or excessive voltage occurs, the electrolyte is decomposed or vaporized to generate a gas, and this gas fills the rectangular container 2c. As a result, the internal pressure of the battery increases. A gas release valve 2f that releases internal gas when the internal pressure in the rectangular container 2c becomes equal to or higher than a predetermined value is formed.

The gas release valve 2f has thin portions formed in three directions so that it is easily broken when the internal pressure increases. Thus, one battery cell 2 closes the upper opening of the rectangular container 2c with the battery lid 2d, and the battery lid 2d includes the positive electrode external terminal 2a and the negative electrode external terminal 2b, and at the center of the battery lid 2d. A liquid injection port 2e and a gas release valve 2f are formed.

The spacer 3 has a configuration for holding the battery cell 2 by combining the two. The spacer 3 is interposed between the two battery cells 2, and spacers 3 A and 3 A for end portions are provided at both ends in the arrangement direction of the plurality of battery cells 2 (see FIGS. 2 and 3). Is provided. The

end spacers

3A and 3A are disposed on the outer side in the arrangement direction with respect to the battery cells 2 at both ends in the arrangement direction. The

end spacers

3A and 3A have a shape in which the spacer 3 is divided in half in the arrangement direction one side and the other side at the center position in the arrangement direction. Below, the structure of the spacer 3 is demonstrated and about the

spacers

3A and 3A for edge parts, the detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol.

As shown in FIGS. 5 and 6, the spacer 3 includes a facing wall portion 21 that faces the wide side surface PW of the battery cell 2, a pair of side wall portions 22 that face each other at both ends of the facing wall portion 21 in the cell width direction, A bottom wall portion 23 that connects the lower end portions of the pair of side wall portions 22 is provided.

The opposing wall portion 21 has a size that faces the entire wide side surface PW of the battery cell 2, and a notch portion 24 that is notched and opened at a certain height across the cell width direction. A plurality are provided.

The pair of side wall portions 22 protrudes from the both end portions in the cell width direction of the opposing wall portion 21 toward the one side and the other side in the arrangement direction and extends over the cell height direction with a constant width. The battery cell 2 has a size facing the narrow side surface PN of each battery cell 2 arranged on one side and the other side in the arrangement direction.

The bottom wall portion 23 protrudes from the lower end portion in the cell height direction of the opposing wall portion 21 toward the one side and the other side in the arrangement direction and extends in the cell width direction with a constant width. The battery cell 2 has a size opposed to the bottom surface PB of each battery cell 2 arranged on one side and the other side in the arrangement direction.

When the plurality of spacers 3 are arranged, the pair of side wall portions 22 and the bottom wall portion 23 are arranged on the one side and the other side in the arrangement direction, and the ends on the one side and the other side in the arrangement direction of the spacers 3 adjacent to each other. The spacers 3 are opposed to each other and are continuous with each other in the arrangement direction between the spacers 3. Then, the end portions on the one side and the other side in the arrangement direction of the pair of side wall portions 22 and the bottom wall portion 23 are fitted and sealed with the end portions on the one side and the other side in the arrangement direction of the spacers 3 adjacent to each other.

Joint portions

25 and 26 are provided.

The pair of side wall portions 22 is provided with a convex portion 27 that engages with the bridge bar 4. The convex portions 27 are provided at the end portions on one side and the other side in the arrangement direction at the upper end portion and the lower end portion of the side wall portion 22, respectively. Then, as shown in FIG. 5, when two spacers 3 are connected in the arrangement direction, one protrusion 3 on one side in the arrangement direction of the spacer 3 and another protrusion on the other side in the arrangement direction of the other spacer 3. 27 is overlapped and integrated to form one convex portion 28.

The pair of side wall portions 22 are provided with a plurality of openings 22a that respectively communicate with the notches 24 of the opposing wall portion 21, and the cooling medium is opened in the side wall portion 22 on one side in the cell width direction. The cooling medium that has flowed into the notch 24 of the opposing wall 21 from 22a and passed through the notch 24 can flow out of the opening 22a of the side wall 22 on the other side in the cell width direction. ing.

The bridge bar 4 includes a pair of

lower bridge bars

4L and 4L attached to face the lower ends of the plurality of spacers 3, and a pair of upper bridge bars 4U and 4U attached to face the upper ends of the plurality of spacers 3. Have.

The lower bridge bar 4L and the upper bridge bar 4U have a length extending between the end plate 5 and the section plate 6. The lower bridge bar 4L and the upper bridge bar 4U are provided with recesses 31 that engage with the protrusions 28 formed by the spacers 3 adjacent to each other. In the present embodiment, since eight convex portions 28 are formed at predetermined intervals in the arrangement direction, a total of eight concave portions 31 respectively correspond to the lower bridge bar 4L and the upper bridge bar 4U. In the position. For example, as shown in FIG. 7, the lower bridge bar 4 L and the upper bridge bar 4 U are attached along the side wall portion 22 of the spacer 3, so that the convex portion 28 is fitted and engaged with the concave portion 31. Therefore, it is possible to position the spacers 3 in the arrangement direction by regulating the intervals in the arrangement direction of the spacers 3.

The lower bridge bar 4L is formed of a prismatic member having a rectangular cross section, and is attached along the lower end portion of the side wall portion 22 of the spacer 3. The lower bridge bar 4 L has a recessed portion 31 formed on the facing surface facing the side wall portion 22 of the spacer 3. Eight concave portions 31 are provided at predetermined intervals along the longitudinal direction of the lower bridge bar 4L.

The upper bridge bar 4U is made of a rod-like member having an L-shaped cross section, and is attached along the upper end portion of the side wall portion 22 of the spacer 3. One piece of the upper bridge bar 4U faces the side wall portion 22 of the spacer 3, and the other piece faces the battery lid 2d of the battery cell 2. A recess 31 is provided in one piece of the upper bridge bar 4U. Eight concave portions 31 are provided at predetermined intervals along the longitudinal direction of the upper bridge bar 4U.

Next, a method for assembling the battery block 1 shown in FIG. 1 will be described.

First, seven spacers 3 are arranged between eight battery cells 2 and end spacers 3A are attached from both sides in the arrangement direction. And lower bridge bar 4L is attached to the lower end part of a pair of side wall part 22 of each spacer 3, respectively, and the convex part 28 provided in the lower end part of side wall part 22 engages with the recessed part 31 of lower bridge bar 4L. Let

Then, a pair of upper bridge bars 4U are respectively attached to the upper side in the cell height direction of each battery cell 2 so that the seal sheet 8 and the insulating cover 9 are sandwiched therebetween, and a protrusion provided at the upper end portion of the side wall portion 22. The portion 28 is engaged with the concave portion 31 of the upper bridge bar 4U. Accordingly, the eight battery cells 2 are integrally restrained while being held by the spacers 3 and can be prevented from being disassembled in the arrangement direction. Thereafter, the external terminals of the battery cells 2 adjacent to each other are connected by the bus bar 11, the board unit 10 is attached, and the terminal cap 12 is covered to form one assembled battery.

Two sets of the assembled batteries are made, arranged in the arrangement direction with the section plate 6 interposed therebetween, and the end plates 5 are arranged on both sides in the arrangement direction. Then, the pair of connection plates 7 are approached from both sides in the cell width direction, the end plate 5 and the section plate 6 are fixed, and the lower bridge bar 4L and the upper bridge bar 4U are fixed. Fixing is performed by fastening a screw.

According to the battery block 1 having the above configuration, the plurality of spacers 3 can be positioned and arranged in the arrangement direction by attaching the lower bridge bar 4L and the upper bridge bar 4U. Therefore, when each battery cell 2 expands due to charging / discharging, it is possible to prevent the relative position in the arrangement direction of each battery cell 2 from being changed due to a difference in the degree of expansion of each battery cell 2. The cell 2 can be positioned relatively in the arrangement direction. Therefore, the dimensions of the bus bar 11 and the like connecting the battery cells 2 can be determined with high accuracy, and the assembly work of the battery block 1 can be facilitated.

FIG. 8 is a perspective view showing another embodiment of the battery block, and FIG. 9 is a perspective view showing an embodiment of the battery module using the battery block shown in FIG.

The battery block 1 shown in FIG. 8 has four assembled batteries arranged in series, and the total number of battery cells 2 is 32. A section plate 6 is arranged for every eight battery cells 2, and a total of three section plates 6 are used.

FIG. 9 is a perspective view showing an embodiment of a battery module using the battery block shown in FIG. 8, which is partially cut away so that the inside can be seen.

The battery module 40 is configured such that the battery block 1 is disposed sideways so that the

external terminals

2a, 2b side of the battery cell 2 are side surfaces, and is housed in a housing 41. The housing 41 has a base 42 and a cover 44, the base 42 contacts the lower side of the battery block 1, is fixed to the

end plates

5, 5 and the section plate 6, and the cover 44 contacts the upper part of the battery block 1. The

end plates

5 and 5 and the section plate 6 are fixed.

The cover 44 is fixed to the outer peripheral portion of the base 42 and seals the entire housing 41. In this configuration, the space provided to flow the cooling medium between the cover 44 and the upper part of the battery block 1 and the space provided to flow the cooling medium between the base 42 and the lower part of the battery block 1 have a plurality of batteries. Communication is made through a gap between the cells 2.

A battery module 40 shown in FIG. 9 has a configuration in which three battery blocks 1 shown in FIG. The housing 41 has a substantially rectangular bottom surface portion and a pair of side surfaces that face each other by being bent upward at a pair of long side portions of the bottom surface portion.

Side plates

43 and 43 that block between the ends on one side in the long side direction and between the ends on the other side in the long side direction, and a cover 44 that blocks the upper opening formed by the base 42 and the side plate 43, respectively. Have.

In the case 41, the battery block 1 is fastened to the base 42 at one end in the cell width direction of the end plate 5 and the section plate 6, and is fastened to the cover 44 at the other end in the cell width direction. Is fixed.

A battery management system (BMS) (not shown) is accommodated inside the casing 41, and a communication connector 17 for connecting to the battery management system (BMS) is provided on the side of the casing 41. ing. Further, battery input / output lines 16 for performing input / output of the battery cell 1 in the housing 41 protrude from the side surface of the housing 41.

A cooling air inlet for introducing cooling air, which is a cooling medium, into the casing 41 is formed at the lower surface of the casing 41 and at one end in the longitudinal direction, and a duct 45 for supplying cooling air is connected to the casing 41. Has been. A cooling air outlet 46 for leading cooling air from the housing 41 is formed in the upper surface of the housing 41 and at the other end in the longitudinal direction.

The battery module 40 can cause cooling air to flow into the battery block 1 from one side (lower side in the drawing) of the battery block 1 through the duct 45. Then, the cooling air is passed between the battery cells 2 along the cell width direction to cool each battery cell 2, and the cooled air is supplied from the other side (upper side in the drawing) of the battery block 1 in the cell width direction. It is allowed to flow out and pass through the upper part in the housing 41 and be discharged from the cooling air outlet 46.

10 is a perspective view showing another embodiment of the battery module, FIG. 11 is an exploded perspective view of the battery module shown in FIG. 10, and FIG. 12 is a flow chart of the cooling medium in the battery module shown in FIG. It is a figure to do.

A battery module 50 shown in FIG. 10 has a configuration in which three battery blocks 1 shown in FIG. 1 are arranged in parallel and further divided into two in the arrangement direction, and a total of six battery blocks 1 are arranged. Have. The battery block 1 has two pairs of battery cells 2 opposite to the

terminals

2a and 2b opposite to each other and back to back, and the battery cell 2 on the opposite side of the partition plate 58 across the partition plate 58. Two are arranged so that the

terminals

2a and 2b are located. Each battery block 1 is fixed in the casing 51 by fastening the end plate 5 and the section plate 6 to the base 52 and the cover 53 of the casing 51.

As shown in FIGS. 10 and 11, the casing 51 includes a base 52 and a cover 53 that have a U-shaped cross section and are aligned with each other, and

side plates

54 and 54 that close both ends in the long side direction. Have. A battery management system (BMS) 55, a junction box 56, and a disconnect switch 57 are accommodated at the center in the long side direction in the casing 51, and the battery block 1 is arranged separately on both sides in the long side direction. ing. The battery management system (BMS) 55 and the junction box 56 are directly fastened and fixed to the bottom surface of the base 52, and the disconnect switch 57 is fastened and fixed on a step formed in the base 52. A connector is provided on a side surface of the base 52.

A cooling air inlet 52b is formed at a substantially central position on the bottom surface of the base 52. Then, on the bottom surface of the base 52, a concave groove 52 a that forms a space between the battery block 1 and the side surface on one side in the cell width direction is provided along the arrangement direction of the battery cells 2. A seal is interposed at a contact portion between each battery block 1 and the base 52 so that the cooling air does not leak to other portions.

Cooling air outlets 53 a are formed at both ends of the cover 53 in the long side direction. Then, on the upper surface of the cover 53, a concave groove 53 b is formed along the arrangement direction of the battery cells 2 to form a space between the battery block 1 and the other side surface in the cell width direction. A seal is interposed at a contact portion between each battery block 1 and the cover 53 so that the cooling air does not leak to other portions.

The space formed between the base 52 and the battery block 15 by the concave groove 52a of the base 52 and the concave groove 53a of the cover 53 and between the cover 53 and the battery block 15 is for temperature adjustment of the battery cell 1. It is a fluid passage.

As shown in FIG. 12, the cooling air is introduced into the housing 51 from the cooling air inlet 52 b, passed through the concave groove 52 a of the base 52, and between each battery cell 2 from one side in the cell width direction of the battery block 1. Can be allowed to flow into. Then, it flows out from between the battery cells 2 to the other side in the cell width direction of the battery block 1, passes through the concave groove 53 a, and can be discharged from the cooling air outlet 53 a to the outside of the housing 51. When the cooling air passes through the gaps provided between the battery cells 2, heat exchange is performed by the temperature difference between the battery cells 2 and the cooling air, and the temperature of the battery cells 2 is adjusted.

When the gas release valve 2f of each battery cell 2 is opened, the gas ejected from the gas release valve 2f is blown to the side surface of the cover 53 or the partition plate 58 and accumulates in the housing 51, and is not shown in the figure. It is discharged to the outside of the casing 51 from the discharge port.

Seals are provided between the base 52 and the battery block 15, and between the cover 53 and the battery block 15, and the space formed by the

concave grooves

52 a and 53 a is isolated in the housing 51. Therefore, the gas ejected into the casing 51 can be prevented from flowing into the fluid passage, and the fluid passage of the cooling air and the gas released from the battery cell 2 can be separated and discharged separately.

According to the battery module 50 having the above configuration, since the end plate 5 and the section plate 6 are directly fixed to the base 52 and the cover 53 of the casing 51, each battery cell 2 is firmly fixed while simplifying the structure. Can be reduced in size and weight. In addition, the number of battery cells 2 and the number of battery blocks 1 can be increased or decreased to quickly and easily respond to requests such as voltage and capacity.

In the above-described embodiment, an example of a lithium ion secondary battery is shown as a plurality of battery cells. However, the present invention is not limited to this, and other batteries such as nickel metal hydride batteries and battery cells of secondary batteries can be used. Of course, it may be configured by arranging a plurality.

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 one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one 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 block 2 Battery cell 3 Spacer 4 Bridge bar 5 End plate 6 Section plate 7

Connection plate

40, 50

Battery module

41, 51 Case

Claims

A battery block in which a plurality of battery cells are arranged,
A plurality of spacers respectively interposed between the plurality of battery cells;
A battery block, comprising: a bridge bar extending along an arrangement direction of the plurality of battery cells and engaging with the plurality of spacers.
A pair of end plates disposed at both ends in the arrangement direction of the plurality of battery cells;
2. The apparatus according to claim 1, further comprising: at least one section plate that is interposed at an intermediate position in the arrangement direction of the plurality of battery cells and partitions the plurality of battery cells on one side and the other side in the arrangement direction. Battery block.
The plurality of battery cells are arranged along both ends in the cell width direction and extend from one end to the other end in the arrangement direction of the plurality of battery cells, and the pair of end plates and the section plates The battery block according to claim 2, further comprising a pair of connection plates to which the bridge bars are fixed.
A battery module comprising the battery block according to claim 2 or 3,
A battery module comprising: a housing for housing the battery block, wherein the pair of end plates and the section plate are fixed to the housing.