JP2015138620A - Battery pack module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack module being capable of improving volume energy density while improving cooling efficiency by a cooling medium with respect to a plurality of secondary batteries accommodated in a housing.SOLUTION: A housing is provided with an upper housing and a lower housing provided so as to be detachable from each other. The upper housing is provided with a pair of mounting members being mounted in a releasable manner by each detachable member. A mounting section is formed such that at least parts of wall portions of both ends of the upper housing in a predetermined direction are cut out, pass through the wall portions in a thickness direction and are opened to an outside. Each of the pair of mounting members is fixed to the upper housing so as to cover each mounting section by each claw portion being mounted into each recessed groove of the upper housing. Each mounting member opens each mounting section by mounting of each claw portion with respect to each recessed groove of the upper housing being released and causes an internal space of the housing to communicate with the outside.

Description

  Embodiments described herein relate generally to an assembled battery module.

  Conventionally, a connection bus bar that connects between electrode terminals of a plurality of secondary batteries is welded to the electrode terminals by laser welding, electron beam welding, resistance welding, or the like, and disposed above the terminal surface of each secondary battery. 2. Description of the Related Art Secondary battery devices that are screwed and fixed to a control circuit board are known.

JP 2013-196932 A

  The problem to be solved by the present invention is to provide an assembled battery module capable of improving the cooling efficiency by a cooling medium for a plurality of secondary batteries housed in a casing and improving the volume energy density. .

  The assembled battery module of the present embodiment includes a plurality of secondary batteries, a housing that houses the plurality of secondary batteries, and a connection member that is electrically connected to each electrode terminal of the plurality of secondary batteries. And a cooling means for cooling the connecting member, wherein the cooling means cools the connecting member directly or indirectly by a cooling space through which a cooling medium flows.

It is the perspective view which abbreviate | omits part other than the connection bus-bar part of the assembled battery module of embodiment, and shows a structure typically, and the perspective view which expands a connection bus-bar part and shows a structure typically. (A) is sectional drawing which shows typically the housing | casing at the time of the assembly of the assembled battery module of embodiment, (B) is sectional drawing which shows typically the housing | casing after the assembly of the assembled battery module of embodiment is completed. (C) is a cross-sectional view schematically showing a state in which the refrigerant circulation portion is connected to the housing after the assembly of the assembled battery module of the embodiment is completed. It is sectional drawing which shows typically the housing | casing and connection bus-bar of the assembled battery module of the 1st modification of embodiment. It is sectional drawing which shows typically the housing | casing and connection bus bar of the assembled battery module of the 2nd modification of embodiment. It is sectional drawing which shows typically the housing | casing and connection bus-bar of the assembled battery module of the 3rd modification of embodiment. It is a figure which shows typically the upper housing and connection bus-bar of the assembled battery module of the 4th modification of embodiment, (A) is a top view, (B) is sectional drawing. It is sectional drawing which shows typically the upper housing of the assembled battery module of the 5th modification of embodiment, a soft member, and a connection bus bar. It is sectional drawing which shows typically the upper housing and connection bus-bar of the assembled battery module of the 6th modification of embodiment. It is a top view which shows typically the connection bus bar of the assembled battery module of the 7th modification of embodiment.

  Hereinafter, an assembled battery module according to an embodiment will be described with reference to the drawings.

As shown in FIG. 1, the assembled battery module 10 according to the embodiment includes an electrically insulating housing 11 made of resin or the like, a plurality of secondary batteries 12 housed in the housing 11, and a control circuit. And a substrate 13.
The housing 11 includes an upper housing 11a and a lower housing 11b that are detachably provided. The upper housing 11 a includes a part of the upper housing 11 a, for example, at least a part of both end walls in a predetermined direction (longitudinal direction) as a pair of mounting members 15 that are removably mounted by the detachable members 14. ing.

  Each mounting member 15 is fixed to the upper housing 11a so as to block the mounting portions 16 provided on the wall portions at both ends in the predetermined direction of the upper housing 11a. The mounting portion 16 is formed such that at least a part of the wall portions at both ends in a predetermined direction of the upper casing 11a is cut out, penetrates in the thickness direction of the wall portion, and opens to the outside. Each detachable member 14 includes, for example, each claw portion 14b that is detachably attached to each of the plurality of concave grooves 14a provided on the inner wall surface of the upper casing 11a. Thereby, each mounting member 15 is fixed to the upper housing 11a so as to close each mounting portion 16 by mounting each claw portion 14b in each concave groove 14a of the upper housing 11a. Further, each mounting member 15 opens each mounting portion 16 by releasing the mounting of each claw portion 14b to each concave groove 14a of the upper housing 11a, and allows the internal space of the housing 11 to communicate with the outside.

Each of the plurality of secondary batteries 12 is, for example, a nonaqueous electrolyte secondary battery such as a lithium ion battery, and has a flat, substantially rectangular parallelepiped outer container 21 formed of aluminum or an aluminum alloy, and an outer container 21. And an electrode body (not shown) housed together with the non-aqueous electrolyte.
Each secondary battery 12 has a positive electrode terminal 22 connected to the positive electrode of the electrode body and a negative electrode terminal 23 connected to the negative electrode of the outer container 21 via a gasket 24 made of an insulator such as synthetic resin or glass. It is provided at each of both end portions in the longitudinal direction on a terminal surface 25 (for example, an upper end surface in the vertical direction) provided on the surface.
In the secondary batteries 12 adjacent to each other, the adjacent secondary batteries 12 are electrically connected to each other by the connection bus bar 27 made of a metal such as conductive aluminum.

The connection bus bar 27 has various shapes according to the connection form to the plurality of secondary batteries 12. For example, the connection bus bar 27 illustrated in FIG. 1 includes two sets of secondary batteries adjacent to each other in the longitudinal direction of the exterior container 21. The battery 12 has a substantially H-shaped plate shape that connects the positive electrode terminal 22 and the negative electrode terminal 23 of the battery 12.
The connection bus bar 27 is formed by bending a metal plate such as conductive aluminum. The connection bus bar 27 is provided at a pair of the first connection portion 31 provided at the first end portion 27a and the second end portion 27b. A pair of second connecting portions 32 and a connecting portion 33 for connecting the first end portion 27a and the second end portion 27b are provided. Further, the connection bus bar 27 includes a connection piece 34 having a screw hole 34 a for screwing and fixing to the control circuit board 13.

Each of the first connection portion 31 and the second connection portion 32 includes a connection opening 42. The connection opening 42 includes an inner wall part 42b that forms a connection opening 42a that penetrates in the thickness direction of the connection bus bar 27, and a part of the inner wall part 42b opposite to the positive electrode terminal 22 and the negative electrode terminal 23 is cut away. In this way, the thin portion 42c whose thickness is reduced by one step is provided.
Each of the first connection portion 31 and the second connection portion 32 faces the connection opening 42 a to the positive electrode terminal 22 and the negative electrode terminal 23, and the surfaces of the first connection portion 31 and the second connection portion 32 are the positive electrode terminal 22. Further, welding such as laser welding is performed on the thin-walled portion 42 c while being in contact with the negative electrode terminal 23, so that the positive electrode terminal 22 and the negative electrode terminal 23 are joined.

  The connecting portion 33 includes a bent portion 33a whose cross section bulges in a direction away from the secondary battery 12 into a convex shape for stress relaxation such as an arc plate shape, a U-shaped plate shape, or a V-shaped plate shape. .

The control circuit board 13 includes at least one of the plurality of secondary batteries 12 accommodated in the housing 11, and includes a wide long side surface 21 a and a narrow short side surface 21 b that form the side surface of the outer casing 21. It is disposed between the short side surface 21 b and the inner wall surface of the housing 11. That is, in the secondary battery 12 in which the short side surface 21 b of the outer container 21 is opposed to the inner wall surface of the housing 11, the control circuit board 13 is on the side of the secondary battery 12 on the short side surface 21 b side of the side surface of the outer container 21. It is arranged in the direction.
The control circuit board 13 is electrically connected to each connection bus bar 27 via a conductive wiring member (not shown).

The assembled battery module 10 of the present embodiment is shown in FIG. 2 (A) in various operations such as when the assembled battery module 10 is incorporated into a battery panel (not shown) and when the assembled battery module 10 is assembled. As described above, the upper casing 11a and the lower casing 11b are connected, and a pair of mounting members 15 are mounted on the upper casing 11a so as to form a part of the upper casing 11a. Thus, the internal space of the housing 11 is blocked from the outside, and each connection bus bar 27 is covered with the electrically insulating upper housing 11a.
On the other hand, after various operations are completed, as shown in FIG. 2B, the mounting of the pair of mounting members 15 to the upper housing 11a is released (for example, the pair of mounting members 15 are connected to the upper housing 11a). The internal space of the housing 11 is set to communicate with the outside. In this case, the cooling medium C (for example, air in an external atmosphere or a cooling gas) flows from the outside into the internal space of the housing 11 through the mounting portions 16 of the upper housing 11a. However, it becomes a cooling space in which the cooling medium C that directly cools the connection bus bar 27 flows.

  Note that at least one of the pair of mounting portions 16 of the upper casing 11a may be connected to a coolant circulation portion 51 for circulating the cooling medium C as shown in FIG. The refrigerant circulation unit 51 includes, for example, a circulation pipe (not shown) serving as a flow path for the cooling medium C, a pump (not shown) that causes the cooling medium C to flow, and the like.

  As described above, according to the assembled battery module 10 according to the present embodiment, operations such as assembling of the assembled ground module 10 are performed in a state where the connection bus bar 27 is covered with the electrically insulating upper housing 11a. Therefore, the occurrence of an abnormality such as a short circuit in the connection bus bar 27 can be prevented, and work safety can be ensured. Further, after various operations such as assembly of the assembled ground module 10 are completed, the pair of mounting members 15 are removed from the upper housing 11a with a simple operation, and a flow path for the cooling medium is formed. The connection bus bar 27 can be easily and efficiently cooled. Since the connection bus bar 27 is connected to the electrode body in the exterior container 21, the inside of the secondary battery 12 can be indirectly cooled by cooling the connection bus bar 27. Since the work such as the wiring is completed after the work such as the assembly is completed, the occurrence of an abnormality such as a short circuit is prevented even if the connection bus bar 27 is exposed.

Furthermore, since the control circuit board 13 is not disposed above the terminal surface 25 of the secondary battery 12 but is disposed on the side of the side surface, the volume energy density can be improved.
Further, since the connection bus bar 27 is not covered by the control circuit board 13, the cooling efficiency on the surface of the connection bus bar 27 can be improved, and the pressure loss of the cooling medium flowing toward the surface of the connection bus bar 27 can be reduced. Can be reduced.
Further, since the control circuit board 13 is disposed on the side of the short side surface 21b of the side of the outer container 21 of the secondary battery 12, for example, due to the increase in the internal pressure of the secondary battery 12, the electrode body Even when the outer casing 21 expands on the side of the long side surface 21a corresponding to the laminated surface, it is possible to prevent problems such as contact between the control circuit board 13 and the outer casing 21.

Hereinafter, the first modification will be described.
In the above-described embodiment, the internal space of the housing 11 is the cooling space, but is not limited to this, and at least the connection bus bar 27 is provided inside the housing 11 as in the first modification shown in FIG. The outer side of the upper casing 11a may be used as a cooling space in a state where a part (for example, the connecting portion 33) is in contact with the inner surface of the upper casing 11a.
In the upper casing 11a of the first modified example, the mounting member 15 and the mounting section 16 are omitted from the upper casing 11a of the above-described embodiment. For example, the lower casing 11b can be closed so that the inside of the lower casing 11b can be closed. It is formed in a plate shape to be connected.
The upper casing 11a of the first modified example is cooled when the cooling medium C circulating outside contacts the surface of the upper casing 11a. As a result, the connection bus bar 27 is indirectly cooled by the cooling medium C via the upper housing 11 a in contact with at least a part of the connection bus bar 27.

  According to the first modification, the upper housing 11a is brought into contact with the connection bus bar 27. Therefore, for example, as compared with the case where the upper housing 11a is arranged apart from the connection bus bar 27, the height of the assembled ground module 10 is increased. Therefore, the volume energy density of the assembled ground module 10 can be improved. Furthermore, the connection bus bar 27 can be indirectly cooled through the upper casing 11a by the cooling medium C flowing toward the surface of the upper casing 11a. Furthermore, in addition to suppressing the increase in size of the assembled ground module 10 and improving the cooling efficiency, the upper housing 11a closes the inside of the housing 11, so that, for example, the cooling medium C is covered with dust or moisture. Even if they are included, they can be prevented from adhering directly to the connection bus bar 27, and abnormalities such as insulation failure can be prevented. In addition, since the surface of the upper housing 11a is directly cooled, not only the gaseous cooling medium C but also, for example, indirectly connected bus bars using various cooling devices such as a heat sink using a liquid cooling medium. 27 can be cooled.

Hereinafter, a second modification will be described.
In the first modification described above, at least a part of the connection bus bar 27 (for example, the connecting portion 33) is brought into contact with the inner surface of the upper housing 11a. However, the present invention is not limited to this. As in the second modification, the inner surface of the upper housing 11 a may be formed to have a shape along the surface shape of the connection bus bar 27.
According to the second modification, the inner surface of the upper housing 11a can contact the entire surface of the connection bus bar 27, and the contact area between the inner surface of the upper housing 11a and the surface of the connection bus bar 27 is increased. In addition, it is possible to reduce an adiabatic air layer provided between the upper housing 11a and the connection bus bar 27. Thereby, the thermal conductivity between the upper housing | casing 11a and the connection bus bar 27 can be increased, and the cooling efficiency of the indirect connection bus bar 27 via the upper housing | casing 11a can be improved.

Hereinafter, a third modification will be described.
In the first modification or the second modification described above, as in the third modification shown in FIG. 5, the upper housing 11 a is a part of the connection bus bar 27, for example, each first connection portion 31 and each second connection. You may provide the exposure part 52 which is site | parts other than the connection part 32, and exposes the connection part 33 etc. outside. For example, the exposed portion 52 forms a through-hole penetrating in the thickness direction in a part of the upper housing 11a, and exposes the surface of the connecting portion 33 having a convex shape in the connection bus bar 27 from the through-hole to the outside.
According to the third modification, a part of the connection bus bar 27 exposed to the outside from the exposed portion 52 is directly cooled by the cooling medium C, so that the cooling efficiency can be improved. In this case, parts other than the part exposed to the outside in the connection bus bar 27 (for example, each first connection part 31 and each second connection part 32) are covered with the upper housing 11a. Thereby, for example, even when the cooling medium C contains dust, moisture, and the like, these are prevented from directly adhering to the first connection portions 31 and the second connection portions 32 of the connection bus bar 27. It is possible to prevent the occurrence of abnormalities such as defective insulation.

Hereinafter, a fourth modification will be described.
In at least one of the first to third modifications described above, as shown in FIGS. 6A and 6B, the upper housing 11a is integrated with the plurality of connection bus bars 27 by insert molding or the like. It may be molded.
In the fourth modified example, on the outer surface of the upper casing 11a, each pair of the first connection portion 31 and the second connection portion 32 of each of the plurality of connection bus bars 27 can be welded from the outside. It is exposed to the outside from the upper housing 11a. On the inner surface of the upper housing 11 a, the entire surface of the connection bus bar 27 is exposed to the inside of the housing 11.
In the fourth modification, when the assembled ground module 10 is assembled, each of the plurality of connection bus bars 27 is connected to each of the plurality of secondary batteries 12 as the upper casing 11a is connected to the lower casing 11b. The positive electrode terminal 22 and the negative electrode terminal 23 are in contact with each other. Then, the first connection portion 31 and the second connection portion 32 of each connection bus bar 27 in contact with each of the positive electrode terminal 22 and the negative electrode terminal 23 are welded by laser welding or the like from the outside, so that each first connection is performed. The part 31 and the second connection part 32 are joined to the positive terminal 22 and the negative terminal 23.

  According to the fourth modification, the upper housing 11a insert-molds each connection bus bar 27 so that each of the first connection portion 31 and the second connection portion 32 of each connection bus bar 27 is exposed. The thermal conductivity between the housing 11a and the connection bus bar 27 can be increased, and the cooling efficiency of the indirect connection bus bar 27 via the upper housing 11a can be improved. Furthermore, since the upper housing 11a and the connection bus bar 27 are integrated, the rigidity can be increased, and the thickness required to ensure the desired rigidity can be reduced. As a result, the height of the assembled ground module 10 can be prevented from increasing, and the volume energy density of the assembled ground module 10 can be improved. Furthermore, when the assembled ground module 10 is assembled, a plurality of connection bus bars 27 can be installed together with the upper housing 11a. For example, a short circuit or the like occurs in each connection bus bar 27 in the wiring work for the plurality of secondary batteries 12. Can be prevented, work safety can be ensured, and work efficiency can be improved.

Hereinafter, a fifth modification will be described.
In the above-described embodiment, the internal space of the housing 11 is the cooling space, but the present invention is not limited to this, and the inner surface of the upper housing 11a has the soft member 53 as in the fifth modification shown in FIG. The outer side of the upper housing 11a may be used as a cooling space in a state in which the connection bus bar 27 is connected to at least a part of the surface.
In the upper casing 11a of the fifth modification, the mounting member 15 and the mounting section 16 are omitted from the upper casing 11a of the above-described embodiment. For example, the lower casing 11b can be closed so that the inside of the lower casing 11b can be closed. It is formed in a plate shape to be connected.
As the soft member 53, various materials such as resin and metal can be used. For example, it is made of an electrically insulating material (for example, soft silicon resin).
According to the fifth modification, it is possible to prevent the presence of an adiabatic air layer between the upper housing 11a and the connection bus bar 27 regardless of the shapes of the upper housing 11a and the connection bus bar 27, and The thermal conductivity between the body 11a and the connection bus bar 27 can be increased, and the cooling efficiency of the indirect connection bus bar 27 via the upper housing 11a can be improved.

Hereinafter, a sixth modification will be described.
In the above-described embodiment, the connecting portion 33 of the connection bus bar 27 includes the bent portion 33a that bulges and bends in a direction away from the secondary battery 12, but is not limited thereto, and the first embodiment shown in FIG. As in the sixth modification, the connecting portion 33 may be bent and formed in a convex shape so as to bulge in a direction away from the upper housing 11a.
The connecting portion 33 of the connection bus bar 27 of the sixth modification includes a bent portion 54 that bulges and bends in a direction away from the upper housing 11a, and a bent portion 54, a first connecting portion 31, and a second connecting portion 32. And a bulging portion 55 that bulges in a convex shape lower than the bent portion 33a of the embodiment in a direction approaching the upper housing 11a. The bent portion 54 is separated from the upper housing 11a so as to be positioned between adjacent secondary batteries 12 electrically connected by the connection bus bar 27, that is, at a position shifted from the terminal surface 25 of each secondary battery 12. It is formed to bend in the direction of The bent portion 54 is formed in a convex shape for stress relaxation such as an arc plate shape, a U-shaped plate shape, or a V-shaped plate shape in cross section.
According to the sixth modification, the convex shape of the connecting portion 33 of the connection bus bar 27 is convex toward the direction away from the upper housing 11a at a position shifted from the terminal surface 25 of the secondary battery 12, The height of the assembled ground module 10 can be prevented from increasing above the terminal surface 25, and the volume energy density of the assembled ground module 10 can be improved. Furthermore, the pressure loss of the cooling medium C flowing from the upper side of the connection bus bar 27 toward the surface of the connection bus bar 27 can be reduced, and the reduction in the flow rate of the cooling medium C is suppressed, and the connection bus bar 27 is made efficient. Can cool well.

Hereinafter, a seventh modification will be described.
In the above-described embodiment, the connecting portion 33 of the connection bus bar 27 includes the bent portion 33a that bulges and bends in a direction away from the secondary battery 12, but is not limited thereto, and the first embodiment shown in FIG. As in the seventh modification, the connecting portion 33 is formed in a flat plate shape that connects the first connecting portions 31 and the second connecting portions 32, and a plurality of slits 56 are formed for stress relaxation. Good.
According to the seventh modification, the connecting portion 33 of the connection bus bar 27 has a flat shape without having a convex shape in the height direction of the assembled ground module 10, so that the height of the assembled ground module 10 increases. Can be prevented, and the volume energy density of the assembled ground module 10 can be improved. Furthermore, the pressure loss of the cooling medium C flowing toward the surface of the connection bus bar 27 can be reduced, the reduction in the flow rate of the cooling medium C can be suppressed, and the connection bus bar 27 can be efficiently cooled.

Hereinafter, other modified examples will be described.
For example, in the above-described embodiment, the upper housing 11a is provided with the pair of mounting members 15 at both ends in a predetermined direction. However, the present invention is not limited to this, and there are three or more at other positions of the upper housing 11a. A plurality of mounting members 15 may be provided.
In the above-described embodiment, the detachable member 14 includes the claw portion 14b that is mounted in the concave groove 14a of the upper housing 11a. However, the present invention is not limited thereto, and may be configured to be detachable according to other forms. .
In the above-described embodiment, each mounting member 15 is removable from the upper casing 11a. However, the present invention is not limited to this. For example, a lid that can open and close the mounting section 16 while being supported by the upper casing 11a. Or the like.

For example, in the above-described embodiment, the control circuit board 13 is disposed on the side of the short side surface 21b of the outer container 21 of the secondary battery 12, but is not limited to this, and on the side of the long side surface 21a. It may be arranged.
In the above-described embodiment, the control circuit board 13 is housed inside the housing 11. However, the control circuit board 13 is not limited to this and may be disposed outside the housing 11. In this case, the volume energy density of the assembled ground module 10 can be further improved.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Assembly battery module, 11 ... Housing | casing, 11a ... Upper housing, 11b ... Lower housing | casing, 12 ... Secondary battery, 13 ... Control circuit board, 14 ... Detachable member, 15 ... Mounting member, 16 ... Mounting part, 21 DESCRIPTION OF SYMBOLS ... Exterior container, 22 ... Positive electrode terminal, 23 ... Negative electrode terminal, 27 ... Connection bus bar, 31 ... 1st connection part, 32 ... 2nd connection part, 33 ... Connection part, 33a ... Bending part, 51 ... Refrigerant distribution part, 52 ... exposed portion, 53 ... soft member, 54 ... bent portion, 55 ... bulge portion, 56 ... slit

Claims (14)

A plurality of secondary batteries;
A housing for housing the plurality of secondary batteries;
A connection member electrically connected to each electrode terminal of the plurality of secondary batteries;
Cooling means for cooling the connecting member;
With
The cooling means cools the connecting member directly or indirectly by a cooling space in which a cooling medium flows.
Battery module. The upper part of the housing is
A part of the upper part of the housing is provided as a mounting member that is mounted so as to be removable.
The internal space of the housing that leads to the outside in a state where the mounting member is released from the upper portion of the housing is the cooling space.
The assembled battery module according to claim 1. The part where the mounting member is removed in the upper part of the housing is connected to a refrigerant circulation part for circulating the cooling medium.
The assembled battery module according to claim 2. The cooling means uses the outside on the upper side of the housing as the cooling space,
The upper part of the housing includes an electrically insulating contact portion that contacts at least a part of the connection member.
The assembled battery module according to claim 1. The upper portion of the housing has an inner surface shaped along the surface shape of the connection member at the contact portion, and the inner surface is brought into contact with the surface of the connection member.
The assembled battery module according to claim 4. The upper portion of the housing includes an exposed portion that exposes a part of the connection member to the outside.
The assembled battery module according to claim 4 or 5. The upper part of the housing is formed integrally with the connection member,
The assembled battery module according to any one of claims 4 to 6. The upper part of the casing has higher thermal conductivity than the exterior part of the secondary battery,
The assembled battery module according to any one of claims 4 to 7. The cooling means uses the outside on the upper side of the housing as the cooling space,
The upper part of the housing is connected to at least a part of the connection member via an electrically insulating soft member.
The assembled battery module according to claim 1. The soft member has higher thermal conductivity than the exterior part of the secondary battery.
The assembled battery module according to claim 9. The connection member includes a plurality of connection portions that are in contact with the electrode terminals, and a bending portion that bends in a convex shape between the plurality of connection portions,
The bent portion bends in a convex shape in a direction away from the upper portion of the housing.
The assembled battery module according to any one of claims 1 to 10. The connection member includes a plurality of connection portions that contact the electrode terminals, and a connection portion that connects the plurality of connection portions and is formed with a slit.
The assembled battery module according to any one of claims 1 to 10. A circuit board disposed on at least one side of the plurality of secondary batteries and electrically connected to the connection member;
The assembled battery module according to any one of claims 1 to 12. The circuit board is disposed at a side of the short side surface among a wide long side surface forming a side surface and a short short side surface forming a side surface in at least one of the plurality of secondary batteries.
The assembled battery module according to claim 13.

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