Connection module set, electrode connection member set, and battery pack

Abstract

To provide a connection module set suitable for improving assembly workability of a battery pack, an electrode connection member set, and a battery pack.SOLUTION: A connection module set comprises a first connection module and a second connection module. The first connection module includes a first electrode connection member. The first electrode connection member includes a proximal end, which is electrically connected with a first electrode terminal of a first battery module, and a protruding end which protrudes in a first direction. The second connection module includes a second electrode connection member. The second electrode connection member includes a proximal end, which is electrically connected with a second electrode terminal of a second battery module, and a holding part in which the protruding end of the first electrode connection member of the first connection module is inserted in the first direction and held.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] Embodiments of the present invention relate to a connection module set, an electrode connection member set, and a battery pack.

Background Art

[0002] A battery pack in which a plurality of battery modules are arranged side by side is known. Further, as a structure for preventing corrosion of the surface of a bus bar, in a metal clad material formed by joining a first metal plate made of an aluminum plate and a second metal plate made of a metal different from the first metal plate, a structure has been proposed in which the first metal plate has a fitting groove and the second metal plate has a fitting protrusion that is fitted into the fitting groove.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when connecting the electrodes of a plurality of battery modules using a connection structure by bolt fastening, it may be difficult to improve the assembly workability.

[0005] One embodiment of the present invention provides a connection module set, an electrode connection member set, and a battery pack suitable for improving the assembly workability of a battery pack.

Means for Solving the Problems

[0006] The connection module set according to an embodiment of the present invention is a member set used in a battery pack including a first battery module and a second battery module adjacent to the first battery module in a first direction. The connection module set includes a first connection module and a second connection module. When a direction intersecting the first direction is defined as a second direction, the first connection module has an insulating first base body disposed opposite to an end portion of the first battery module in the second direction, and a first electrode connection member supported by the first base body. The first electrode connection member includes a base end portion electrically connected to a first electrode terminal of the first battery module, and a protruding end portion protruding in the first direction. The second connection module has an insulating second base body disposed opposite to the second end portion of the second battery module, and a second electrode connection member supported by the second base body. The second electrode connection member includes a base end portion electrically connected to a second electrode terminal of the second battery module, and a holding portion in which the protruding end portion of the first electrode connection member of the first connection module is inserted and held from the first direction.

[0007] The electrode connection member set according to an embodiment of the present invention is a member set used in a battery pack including a first battery module and a second battery module adjacent to the first battery module in a first direction. The electrode connection member set includes a first electrode connection member and a second electrode connection member. When a direction intersecting the first direction is defined as a second direction, the first electrode connection member includes a base end portion that overlaps with one end portion of the first battery module when viewed from the second direction and is electrically connected to a first electrode terminal of the first battery module, and a protruding end portion protruding in the first direction. The second electrode connection member includes a base end portion that overlaps with one end portion of the second battery module when viewed from the second direction and is electrically connected to a second electrode terminal of the second battery module, and a holding portion having an elastically deformable portion in a direction intersecting the first direction, in which the protruding end portion of the first electrode connection member is inserted and held from the first direction.

[0008] A battery pack according to an embodiment of the present invention includes a first battery module, a second battery module, a first connection module, and a second connection module. The second battery module is adjacent to the first battery module in a first direction. When a direction intersecting the first direction is defined as a second direction, the first connection module includes an insulating first base body disposed opposite to an end portion of the first battery module in the second direction, and a first electrode connection member supported by the first base body. The first electrode connection member includes a base end portion electrically connected to a first electrode terminal of the first battery module, and a protruding end portion protruding in the first direction. The second connection module includes an insulating second base body disposed opposite to the second end portion of the second battery module, and a second electrode connection member supported by the second base body. The second electrode connection member includes a base end portion electrically connected to a second electrode terminal of the second battery module, and a holding portion into which the protruding end portion of the first electrode connection member of the first connection module is inserted and held from the first direction.

Advantages of the Invention

[0009] According to an embodiment of the present invention, it is possible to provide a connection module set, an electrode connection member set, and a battery pack that can improve the assembly workability of the battery pack.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments will be described with reference to the drawings. In the following description, the same reference numerals are given to configurations having the same or similar functions. And the overlapping description of those configurations may be omitted. In the present disclosure, terms are defined as follows. "Connection" is not limited to mechanical connection and may include electrical connection. That is, "connection" is not limited to the case where two elements to be connected are directly connected, and may include the case where two elements to be connected are connected with another element intervening therebetween. "Supported" is not limited to the case of being supported by directly contacting, and may include the case of being supported with another element intervening therebetween.

[0012] In the present disclosure, the +X direction, -X direction, +Y direction, -Y direction, +Z direction, and -Z direction are defined as follows. The +X direction is the direction from the battery module 10A to the battery module 10B described later (see FIG. 2). The -X direction is the direction opposite to the +X direction. When the +X direction and the -X direction are not distinguished, they are simply referred to as the "X direction". The +Y direction and the -Y direction are directions that intersect (e.g., are orthogonal to) the X direction. The +Y direction is the direction from the first end portion 11EA to the second end portion 11EB of the battery module 10 described later (see FIG. 2). The -Y direction is the direction opposite to the +Y direction. When the +Y direction and the -Y direction are not distinguished, they are simply referred to as the "Y direction". The +Z direction is a direction that intersects (e.g., is orthogonal to) the X direction and the Y direction. The +Z direction is the direction from the battery module 10 to the layout module 80 described later (see FIG. 2). The -Z direction is the direction opposite to the +Z direction. When the +Z direction and the -Z direction are not distinguished, they are simply referred to as the "Z direction". The X direction is an example of the "first direction". The Y direction is an example of the "second direction". The Z direction is an example of the "third direction".

[0013] (Embodiment) <1. Overall Configuration of Battery Pack> FIG. 1 is a perspective view showing the overall configuration of the battery pack 1 according to the embodiment. The battery pack 1 includes, for example, a plurality of battery modules 10, a plurality of wiring modules 20, two layout modules 80, two insulating members 91, two end plates 92, and a plurality of connecting members 93. Note that the battery pack 1 may further include an outer member that houses these members.

[0014] <2. Battery Module> First, the battery module 10 will be described. FIG. 2 is a perspective view showing a partial configuration of the battery pack 1 disassembled. A plurality of battery modules 10 are arranged side by side in the X direction. Each battery module 10 is a structure incorporating a plurality of battery cells 12. In the present embodiment, the battery module 10 is a bipolar type battery module. Each battery module 10 has, for example, a case 11, a plurality of battery cells 12, a positive electrode terminal 13A (see FIG. 3), a negative electrode terminal 13B (see FIG. 3), and a plurality of voltage detection terminals 14 (see FIG. 3).

[0015] <2.1 Case> The case 11 is a container that houses a plurality of battery cells 12. The case 11 has a flat rectangular parallelepiped outer shape. The case 11 has six end faces. The case 11 is arranged such that the end face (main face) having the largest area among the six end faces is along the Y direction and the Z direction. The longitudinal direction of the case 11 is, for example, the Y direction.

[0016] In the present embodiment, the case 11 has a first end portion 11EA and a second end portion 11EB as end portions in the Y direction. The first end portion 11EA is an end portion on the -Y direction side. The first end portion 11EA is an example of "the first end portion of the battery module". Hereinafter, for convenience of explanation, the first end portion 11EA of the case 11 may be referred to as "the first end portion 11EA of the battery module 10". On the other hand, the second end portion 11EB is an end portion on the +Y direction side. The second end portion 11EB is an example of "the second end portion of the battery module". Hereinafter, for convenience of explanation, the second end portion 11EB of the case 11 may be referred to as "the second end portion 11EB of the battery module 10". Also hereinafter, when the first end portion 11EA and the second end portion 11EB are not distinguished, they are simply referred to as "end portion 11E".

[0017] <2.2 Battery Cell> A plurality of battery cells 12 are built into the case 11. The plurality of battery cells 12 are arranged side by side in the X direction inside the case 11, for example. The plurality of battery cells 12 are electrically connected in series. In the present embodiment, two adjacent battery cells 12 in the X direction share one current collector that functions as a bipolar electrode. In FIG. 2, for convenience of explanation, five battery cells 12 are illustrated, but actually, more battery cells 12 may be arranged.

[0018] <2.3 Positive electrode terminal> FIG. 3 is a front view showing the battery module 10. The positive electrode terminal 13A is a positive-side terminal (total positive electrode terminal) electrically connected in series to the plurality of battery cells 12 included in the battery module 10. The positive electrode terminal 13A is an example of the "first electrode terminal". The positive electrode terminal 13A protrudes outside the case 11 so as to be exposed outside the battery module 10. The positive electrode terminal 13A protrudes in the Y direction from the first end portion 11EA or the second end portion 11EB of the case 11. For example, in the battery modules 10 (battery modules 10B, 10D, 10F) located at even positions when counted from the -X direction side, the positive electrode terminal 13A protrudes in the -Y direction from the first end portion 11EA of the case 11 (see FIG. 4). On the other hand, in the battery modules 10 (battery modules 10A, 10C, 10E) located at odd positions when counted from the -X direction side, the positive electrode terminal 13A protrudes in the +Y direction from the second end portion 11EB of the case 11 (see FIG. 4).

[0019] As shown in FIG. 3, the positive electrode terminal 13A is plate-shaped along the Y direction and the Z direction. In the present embodiment, the width 13W1 of the positive electrode terminal 13A in the Z direction is larger than the width 13W2 of the positive electrode terminal 13A in the Y direction (that is, the amount of protrusion in the Y direction from the end portion 11E of the case 11). For example, the width 13W1 of the positive electrode terminal 13A in the Z direction is twice or more the width 13W2 of the positive electrode terminal 13A in the Y direction.

[0020] <2.4 Negative electrode terminal> The negative electrode terminal 13B is a negative terminal (total negative terminal) electrically connected in series to a plurality of battery cells 12 included in the battery module 10. The negative electrode terminal 13B is an example of the "second electrode terminal". The negative electrode terminal 13B protrudes outside the case 11 so as to be exposed outside the battery module 10. The negative electrode terminal 13B protrudes in the Y direction from the first end portion 11EA or the second end portion 11EB of the case 11. For example, in the present embodiment, in the battery modules 10 (battery modules 10B, 10D, 10F) located at even positions when counted from the -X direction side, the negative electrode terminal 13B protrudes in the +Y direction from the second end portion 11EB of the case 11 (see FIG. 4). On the other hand, in the battery modules 10 (battery modules 10A, 10C, 10E) located at odd positions when counted from the -X direction side, the negative electrode terminal 13B protrudes in the -Y direction from the first end portion 11EA of the case 11 (see FIG. 4).

[0021] As shown in FIG. 3, the negative electrode terminal 13B is plate-shaped along the Y direction and the Z direction. In the present embodiment, the width 13W3 in the Z direction of the negative electrode terminal 13B is larger than the width 13W4 in the Y direction of the negative electrode terminal 13B (that is, the amount of protrusion in the Y direction from the end portion 11E of the case 11). For example, the width 13W3 in the Z direction of the negative electrode terminal 13B is twice or more the width 13W4 in the Y direction of the negative electrode terminal 13B. Hereinafter, when the positive electrode terminal 13A and the negative electrode terminal 13B are not distinguished, they are simply referred to as "electrode terminal 13".

[0022] <2.5 Voltage Detection Terminal> The voltage detection terminal 14 is a terminal for detecting a voltage related to the battery module 10 (for example, the voltage inside the battery module 10). For example, the voltage detection terminal 14 is a terminal for detecting the voltage between two adjacent battery cells 12 inside the battery module 10. For example, the voltage detection terminal 14 is electrically connected to a current collector (bipolar electrode) shared by two adjacent battery cells 12 in the X direction, and detects the voltage between the two battery cells 12. In the present embodiment, each battery module 10 has a plurality (for example, 10) of voltage detection terminals 14. The plurality of voltage detection terminals 14 are connected to different positions inside the battery module 10 and detect the voltages between different sets of adjacent battery cells 12. The voltage detection terminal 14 is an example of a "detection terminal". Note that the "detection terminal" referred to in the present disclosure may be a terminal for detecting a physical quantity other than voltage (for example, current or temperature).

[0023] Each of the plurality of voltage detection terminals 14 protrudes outside the case 11 so as to be exposed outside the battery module 10. In the present embodiment, the plurality of voltage detection terminals 14 include a first group of a plurality (for example, 5) of voltage detection terminals 14A and a second group of a plurality (for example, 5) of voltage detection terminals 14B. The first group of the plurality of voltage detection terminals 14A protrudes in the -Y direction from the first end portion 11EA of the case 11. The first group of the plurality of voltage detection terminals 14A are arranged side by side in the Z direction while being spaced apart from each other in the Z direction. The first group of the plurality of voltage detection terminals 14A includes three or more detection terminals arranged in parallel with each other. Each of the first group of the plurality of voltage detection terminals 14A is plate-shaped along the Y direction and the Z direction. In the present embodiment, the width 14W2 of the voltage detection terminal 14A in the Y direction (that is, the amount of protrusion in the Y direction from the end portion 11E of the case 11) is larger than the width 14W1 of the voltage detection terminal 14A in the Z direction.

[0024] On the other hand, the plurality of voltage detection terminals 14B of the second group project in the +Y direction from the second end portion 11EB of the case 11. The plurality of voltage detection terminals 14B of the second group are arranged side by side in the Z direction while being separated from each other in the Z direction. The plurality of voltage detection terminals 14B of the second group include three or more detection terminals arranged in parallel with each other. Each of the plurality of voltage detection terminals 14B of the second group has a plate shape along the Y direction and the Z direction. In the present embodiment, the width 14W4 of the voltage detection terminal 14B in the Y direction (i.e., the amount of projection in the Y direction from the end portion 11E of the case 11) is larger than the width 14W3 of the voltage detection terminal 14B in the Z direction.

[0025] <3. Wiring Module> Next, the wiring module 20 will be described. The wiring module 20 is, for example, a relay member for transmitting a signal obtained from the detection terminal of the battery module 10 to the outside. In the present embodiment, the wiring module 20 is a relay member that electrically connects the detection terminal of the battery module 10 and a wiring module 80 described later. From another perspective, the wiring module 20 is a member for connecting the electrode terminal 13 of the battery module 10 to the electrode terminal 13 of another battery module 10. The wiring module 20 is an example of a "connection module".

[0026] FIG. 4 is a cross-sectional view taken along the line F4-F4 of the battery pack 1 shown in FIG. 2. In the present embodiment, the battery pack 1 has, as a wiring module 20, for example, five types of wiring modules 20A, 20B, 20C, 20D, and 20E. The wiring module 20A and the wiring module 20C are arranged corresponding to the battery modules 10 (for example, battery modules 10B, 10D, 10F) located at even positions when counted from the -X direction side. The wiring module 20A is arranged on the -Y direction side of the battery module 10. The wiring module 20C is arranged on the +Y direction side of the battery module 10. On the other hand, the wiring module 20B and the wiring module 20D are arranged corresponding to the battery modules 10 (for example, battery modules 10C, 10E) located at odd positions when counted from the -X direction side. The wiring module 20B is arranged on the -Y direction side of the battery module 10. The wiring module 20D is arranged on the +Y direction side of the battery module 10. The wiring module 20E is arranged corresponding to, for example, the battery module 10 (for example, battery module 10A) on the most -X direction side.

[0027] Here, first, taking one wiring module 20A as an example, the common configuration in the wiring modules 20A, 20B, 20C, 20D, and 20E will be described. Regarding the details of the wiring module 20B for the common configuration, in the description of the wiring module 20A shown below, it is only necessary to read -X direction and +X direction in reverse. Similarly, for the details of the wiring module 20C, it is only necessary to read -Y direction and +Y direction in reverse, read the first end portion 11EA and the second end portion 11EB in reverse, and read -X direction and +X direction in reverse. Similarly, in the description of the wiring module 20A shown below, for the details of the wiring module 20D, it is only necessary to read -Y direction and +Y direction in reverse, and read the first end portion 11EA and the second end portion 11EB in reverse. The wiring module 20E will be described later.

[0028] FIG. 5 is a side view showing one wiring module 20 (e.g., wiring module 20A). FIG. 6 is a perspective view showing one wiring module 20 (e.g., wiring module 20A). The wiring module 20 has, for example, a base body 30, an electrode connection member 40, a wiring member 50, a thermistor 61, a connector 62, a plurality of fuse components 63 (see FIG. 5), and a cover 64 (see FIG. 2).

[0029] <3.1 Base Body> The base body 30 is a member that serves as the base of the wiring module 20. The base body 30 is formed of an insulating material such as synthetic resin and has insulating properties. The base body 30 is arranged to face the end portion 11E of the battery module 10. For example, the base body 30 faces the first end portion 11EA of the battery module 10 from the -Y direction.

[0030] The base body 30 is attached to the end portion 11E of the battery module 10 using, for example, a fixing portion 30f. The fixing portion 30f is, for example, a fastening member such as a bolt, but may also be an engagement structure or the like, and is not limited to a specific structure. When the base body 30 is attached to the end portion 11E of the battery module 10, the wiring module 20 and the battery module 10 are integrated. In the present embodiment, before a plurality of battery modules 10 are arranged side by side, the wiring module 20 is attached to each battery module 10 to form a battery module assembly AS (see FIG. 4). Each battery module assembly AS includes one battery module 10 and two wiring modules 20 that are separately arranged on both sides of the battery module 10 in the Y direction.

[0031] As shown in FIGS. 5 and 6, the base body 30 has, for example, a first portion 31, a second portion 32, a protruding wall 33, and a plurality of partition walls 34.

[0032] The first part 31 is a thin plate portion extending in the Z direction along the end portion 11E of the battery module 10. The first part 31 extends over most of the battery module 10 in the Z direction. The thickness W31 of the first part 31 in the Y direction is smaller than the width in the Y direction of the above-described electrode terminal 13 (for example, width 13W2, see FIG. 3), and is also smaller than the width in the Y direction of the above-described voltage detection terminal 14 (for example, width 14W2, see FIG. 3). When the wiring module 20 is attached to the battery module 10 and viewed from the -X direction side, the tip portions of each of the electrode terminal 13 and the plurality of voltage detection terminals 14 are exposed to the -X direction side without overlapping the first part 31.

[0033] The second part 32 is a thick plate portion extending in the Z direction along the end portion 11E of the battery module 10. The second part 32 is located away from the first part 31 on the +X direction side. The second part 32 extends in the Z direction parallel to the first part 31. The thickness of the second part 32 in the Y direction is larger than the width in the Y direction of the above-described electrode terminal 13 (for example, width 13W2, see FIG. 3), and is also larger than the width in the Y direction of the above-described voltage detection terminal 14 (for example, W14W2, see FIG. 3).

[0034] The second part 32 has a first surface 32a and a second surface 32b. The first surface 32a is a plane along the X direction and the Z direction. The first surface 32a is a surface portion to which the main body portion 51 of the wiring member 50 described later is attached. The second surface 32b is a plane along the Y direction and the Z direction. For example, the second surface 32b extends in the +Y direction from the end on the -X direction side of the first surface 32a. The second surface 32b is a surface portion facing the second space portion S2 described later.

[0035] In the present embodiment, a first space portion S1 and a second space portion S2 are provided between the first part 31 and the second part 32. The first space portion S1 is provided at a position corresponding to the electrode terminal 13 of the battery module 10. When the wiring module 20 is attached to the battery module 10, the electrode terminal 13 of the battery module 10 is inserted into the first space portion S1 (see FIG. 8).

[0036] The second space part S2 is provided at positions corresponding to a plurality of voltage detection terminals 14 of the battery module 10. When the wiring module 20 is attached to the battery module 10, a plurality of voltage detection terminals 14 of the battery module 10 are inserted into the second space part S2 (see FIG. 8). The second surface 32b of the above-described second part 32 faces the second space part S2 from the +X direction side.

[0037] The protruding wall 33 is a portion protruding in the -Y direction compared to the second part 32 of the base body 30. The protruding wall 33 is arranged adjacent to the second part 32 of the base body 30 from the +X direction side. The protruding wall 33 extends linearly in the -Z direction parallel to the second part 32. The protruding wall 33 is an insulating wall that covers a wiring member 50 and a connector 62, which will be described later, from the +X direction side.

[0038] A plurality of partition walls 34 are arranged between the first part 31 and the second part 32 of the base body 30. The plurality of partition walls 34 are arranged side by side in the Z direction while being spaced apart from each other in the Z direction. Each partition wall 34 extends along the X direction and the Y direction. Each partition wall 34 is connected to the first part 31 and the second part 32 of the base body 30, respectively. The plurality of partition walls 34 are insulating walls provided in the second space part S2.

[0039] The plurality of partition walls 34 divide the second space part S2 into a plurality of regions R. The plurality of regions R are arranged side by side in the Z direction while being electrically insulated from each other. The plurality of regions R are provided at positions corresponding one-to-one with a plurality of voltage detection terminals 14 of the battery module 10. When the wiring module 20 is attached to the battery module 10, a voltage detection terminal 14 of the battery module 10 is inserted into each region R (see FIG. 8). The plurality of partition walls 34 electrically insulate the plurality of voltage detection terminals 14 of the battery module 10 inserted into the second space part S2 from each other.

[0040] <3.2 Electrode Connection Member> The electrode connection member 40 is a member for connecting the electrode terminal 13 of the battery module 10 to the electrode terminal 13 of another battery module 10. The electrode connection member 40 is attached to the second portion 32 of the base body 30 by a fixing portion (not shown), for example. The electrode connection member 40 is supported by the second portion 32 of the base body 30. The electrode connection member 40 has a base end portion 41 connected to the electrode terminal 13 of the battery module 10 and a tip end portion 42 connected to the electrode connection member 40 provided in another wiring module 20.

[0041] The base end portion 41 of the electrode connection member 40 is arranged, for example, along the second surface 32b of the second portion 32 of the base body 30 (see FIG. 10). The base end portion 41 faces the electrode terminal 13 of the battery module 10 inserted into the first space portion S1 from the +X direction side. The base end portion 41 is joined to the electrode terminal 13 of the battery module 10 by, for example, metal bonding. The metal bonding is realized, for example, by performing laser welding or the like from the -X direction side in a state where the base end portion 41 of the electrode connection member 40 and the electrode terminal 13 overlap when viewed from the -X direction. However, the joining method of the base end portion 41 of the electrode connection member 40 and the electrode terminal 13 is not limited to the above example.

[0042] The tip end portion 42 of the electrode connection member 40 extends in the X direction from the base end portion 41. The tip end portion 42 of the electrode connection member 40 will be described in detail later.

[0043] In the present embodiment, the electrode connection member 40 is also used as a terminal for detecting the voltage of the electrode terminal 13. The electrode connection member 40 is an example of a "detection terminal". In the present disclosure, the "detection terminal" is not limited to a dedicated detection terminal, but broadly means a terminal that can be used for detection.

[0044] <3.3 Wiring Member> FIG. 7 is a perspective view showing a wiring member 50, a thermistor 61, and a connector 62. The wiring member 50 is a member having a wiring 53 for transmitting a signal obtained from a detection terminal of the battery module 10 to the outside. The wiring member 50 is, for example, a flat wiring material. In the present disclosure, the "flat wiring material" broadly means a member including a flexible insulating base material and a wiring (conductive pattern) provided on the insulating base material. The flat wiring material is a flexible flat cable (FFC), a flexible printed circuit (FPC), or the like.

[0045] In the present embodiment, the wiring member 50 has a main body portion 51 and a plurality of connection portions 52. The wiring member 50 also has a plurality of wirings 53. The wiring 53 extends across the main body portion 51 and each connection portion 52.

[0046] The main body portion 51 is film-shaped along the X direction and the Z direction. The main body portion 51 is arranged to face the base 30 from the Y direction. The main body portion 51 is attached to the first surface 32a of the second portion 32 of the base 30 by a fixing portion (for example, an adhesive) not shown (see FIG. 6). The main body portion 51 is supported by the first surface 32a of the second portion 32 of the base 30.

[0047] The plurality of connection portions 52 include, for example, a plurality (for example, five) of terminal connection portions 52A for voltage detection terminals, a terminal connection portion 52B for electrode terminals, and a thermistor connection portion 52C.

[0048] (Terminal connection portion for voltage detection terminal) The plurality of terminal connection portions 52A extend from the main body portion 51 while branching from each other. Each of the plurality of terminal connection portions 52A is in the form of a film along the Y direction and the Z direction. The plurality of terminal connection portions 52A are formed, for example, by bending a part of the wiring member 50 from the main body portion 51. The plurality of terminal connection portions 52A are arranged along the second surface 32b of the second portion 32 of the base 30. The plurality of terminal connection portions 52A may be attached to the second surface 32b of the second portion 32 of the base 30 by a fixing portion (such as an adhesive) not shown.

[0049] The plurality of terminal connection portions 52A are separated from each other in the Z direction. The plurality of terminal connection portions 52A include, for example, three or more terminal connection portions 52A arranged parallel to each other. The plurality of terminal connection portions 52A are divided and extend inside the plurality of regions R defined by the plurality of partition walls 34 described above. That is, each of the plurality of terminal connection portions 52A is inserted into a different region R. A partition wall 34 is located between the plurality of terminal connection portions 52A.

[0050] FIG. 8 is a perspective view for explaining the connection structure of the terminal connection portion 52A. The plurality of terminal connection portions 52A are individually connected to the plurality of voltage detection terminals 14 of the battery module 10. For example, each of the plurality of terminal connection portions 52A faces the voltage detection terminal 14 inserted into the same region R from the +X direction inside the region R into which the terminal connection portion 52A is inserted. In the present embodiment, the plurality of terminal connection portions 52A face the plurality of voltage detection terminals 14 in a state of being bent from the main body portion 51.

[0051] The terminal connection portion 52A is joined to the voltage detection terminal 14 by, for example, metal bonding. The metal bonding is realized, for example, by performing laser welding or the like from the -X direction side in a state where the terminal connection portion 52A and the voltage detection terminal 14 overlap when viewed from the -X direction. However, the joining method of the terminal connection portion 52A and the voltage detection terminal 14 is not limited to the above example.

[0052] (Terminal connection portion for electrode terminal) The terminal connection part 52B is a terminal connection part for detecting the voltage of the electrode terminal 13 (the voltage of the power output from the battery module 10). The terminal connection part 52B extends in the -Z direction from the main body part 51 while maintaining the same posture as the main body part 51. The terminal connection part 52B is in the shape of a film along the X direction and the Z direction. The terminal connection part 52B overlaps with the electrode connection member 40 when viewed from the Y direction. The terminal connection part 52B is joined to the electrode connection member 40, for example, by metal bonding, similar to the terminal connection part 52A. However, the joining method between the terminal connection part 52B and the electrode connection member 40 is not limited to the above example.

[0053] (Thermistor connection part) The thermistor connection part 52C branches and extends from the main body part 51 together with a plurality of terminal connection parts 52A. The thermistor connection part 52C is in the shape of a film along the Y direction and the Z direction. The thermistor connection part 52C is formed, for example, by bending a part of the wiring member 50 from the main body part 51. The thermistor connection part 52C is arranged along the second surface 32b of the second part 32 of the base body 30. The thermistor connection part 52C may be attached to the second surface 32b of the second part 32 of the base body 30 by a fixing part (such as an adhesive) not shown. The thermistor connection part 52C is arranged at a position different from that of the plurality of terminal connection parts 52A in the Z direction. The thermistor connection part 52C is connected to a thermistor 61 described later.

[0054] <3.4 Thermistor> The thermistor 61 is a component for detecting the temperature related to the battery module 10. The thermistor 61 is provided inside the wiring module 20. In this embodiment, the thermistor 61 is connected to one voltage detection terminal 14. For example, the thermistor 61 faces the voltage detection terminal 14 from the -X direction side. The thermistor 61 faces the voltage detection terminal 14 from the side opposite to the terminal connection part 52A. The thermistor 61 is joined to the voltage detection terminal 14, for example, by metal bonding, together with the terminal connection part 52A. However, the joining method between the thermistor 61 and the voltage detection terminal 14 is not limited to the above example.

[0055] <3.5 Connector> The connector 62 is a connecting part that removably and electrically connects the wiring module 20 and the wiring module 80. The connector 62 is provided, for example, at the end of the wiring module 20 in the +Z direction. The connector 62 is supported by the base body 30. For example, the connector 62 is placed on the main body 51 of the wiring member 50 and supported by the base body 30 via the wiring member 50. The connector 62 is connected to the main body 51 of the wiring member 50.

[0056] The connector 62 includes a connector body 62a and a plurality of terminals 62b. The connector body 62a has an opening 62h that opens in the +Z direction and a plurality of terminals (not shown) provided inside the opening 62h. The plurality of terminals 62b are provided between the connector body 62a and the wiring member 50. The plurality of terminals 62b are connected to the plurality of wirings 53 of the wiring member 50. In this embodiment, the plurality of terminals 62b correspond one-to-one with the plurality of wirings 53 of the wiring member 50.

[0057] <3.6 Fuse Component> The fuse component 63 is provided on the main body 51 of the wiring member 50 (see FIG. 5). The fuse component 63 is, for example, a surface mount type chip fuse. The fuse component 63 is provided in the middle of each wiring 53 on the main body 51 of the wiring member 50. For example, each wiring 53 includes a first portion 53a connected to the connector 62 and a second portion 53b provided at the connection portion 52. The first portion 53a and the second portion 53b are provided at a distance from each other. The fuse component 63 is electrically connected in series between the first portion 53a and the second portion 53b. When an excessive current flows through the wiring 53 on which the fuse component 63 is provided, the fuse component 63 blows and cuts off the connection between the first portion 53a and the second portion 53b. For example, the fuse component 63 is provided on the main body 51 of the wiring member 50.

[0058] FIG. 9 is an electrical circuit diagram showing the configuration of the wiring module 20 of the embodiment. In this embodiment, the plurality of fuse components 63 includes a plurality (for example, five) of fuse components 63A and one fuse component 63B. The plurality of fuse components 63A are electrically arranged in parallel with each other. Each of the plurality of fuse components 63A is electrically connected between one voltage detection terminal 14 included in the plurality of voltage detection terminals 14 and the connector 62. On the other hand, the fuse component 63B is electrically connected between the electrode connection member 40 and the connector 62. The fuse component 63 is a component used in relation to the battery module 10. The fuse component 63 is an example of an "electronic component".

[0059] <3.7 Cover> Returning to FIG. 2, the cover 64 will be described. The cover 64 is a member that forms a part of the outer shell of the wiring module 20. The cover 64 covers the base body 30, the electrode connection member 40, the wiring member 50, the thermistor 61, the connector 62, and the plurality of fuse components 63 from the -Y direction side.

[0060] <4. Structure of Electrode Connection Member> Next, the connection structure between the plurality of wiring modules 20 will be described. FIG. 10 is a side view showing one wiring module 20A and another wiring module 20B. Hereinafter, for convenience of explanation, the wiring module 20A will be referred to as the "first wiring module 20A". Also, the wiring module 20B will be referred to as the "second wiring module 20B".

[0061] The first wiring module 20A is an example of a "first connection module". The electrode terminal 13 (for example, the positive electrode terminal 13A) of the first wiring module 20A is an example of a "first electrode terminal". The battery module 10 to which the first wiring module 20A is attached is an example of a "first battery module".

[0062] The second wiring module 20B is an example of the "second connection module". The electrode terminal 13 (for example, the negative electrode terminal 13B) of the second wiring module 20B is an example of the "second electrode terminal". The battery module 10 to which the second wiring module 20B is attached is an example of the "second battery module". In the present embodiment, an example of the connection module set MS is formed by the first wiring module 20A and the second wiring module 20B.

[0063] (First wiring module) First, the first wiring module 20A will be described. The first wiring module 20A has a first base 30A as the base 30. Further, the first wiring module 20A has a first electrode connection member 40A as the electrode connection member 40. The first electrode connection member 40A is, for example, a male engagement member. The first electrode connection member 40A is made of metal. The first electrode connection member 40A has a base end portion 41A connected to the electrode terminal 13 of the first battery module 10 and a tip end portion 42A physically and electrically connected to the electrode connection member 40 of the second wiring module 20B.

[0064] The base end portion 41A includes a plate portion along the Y direction and the Z direction. When viewed from the Y direction, the base end portion 41A overlaps with the first end portion 11EA of the first battery module 10. The base end portion 41A faces the electrode terminal 13 (for example, the positive electrode terminal 13A) of the first battery module 10 from the +X direction side. The tip end portion 42A protrudes in the +X direction from the -Y direction side end of the base end portion 41A. The tip end portion 42A includes a plate portion 42p along the X direction and the Z direction. The tip end portion 42A protrudes to the +X direction side, for example, beyond the +X direction side end face of the case 11 of the first wiring module 20A. The tip end portion 42A is an example of the "protruding end portion".

[0065] In this embodiment, the width 40W1 of the first electrode connection member 40A in the Z direction is larger than the width 40W2 of the first electrode connection member 40A in the X direction and larger than the width 40W3 of the first electrode connection member 40A in the Y direction. Also, the width 40W1 of the first electrode connection member 40A in the Z direction is larger than the protruding amount 40W4 of the first electrode connection member 40A from the end face on the +X direction side of the first base 30A. For example, the width 40W1 of the first electrode connection member 40A in the Z direction is two times or more the protruding amount 40W4 of the first electrode connection member 40A. For example, the width 40W1 of the first electrode connection member 40A in the Z direction is the same as the width 13W1 (or width 13W3) of the electrode terminal 13 of the battery module 10 described above in the Z direction.

[0066] In this embodiment, the first base 30A of the first wiring module 20A has a first engaging portion 70A. The first engaging portion 70A includes, for example, a protruding portion 71 protruding in the +X direction. The protruding portion 71 is, for example, a pin protruding linearly in the +X direction.

[0067] (Second Wiring Module) Next, the second wiring module 20B will be described. The second wiring module 20B has a second base 30B as the base 30. Also, the second wiring module 20B has a second electrode connection member 40B as the electrode connection member 40. The second electrode connection member 40B is, for example, a female engagement member. The second electrode connection member 40B is made of metal. The second electrode connection member 40B has a base end portion 41B connected to the electrode terminal 13 of the second battery module 10 and a tip end portion 42B physically and electrically connected to the electrode connection member 40 (first electrode connection member 40A) of the first battery module 10.

[0068] The base end portion 41B includes plate portions along the Y direction and the Z direction. The base end portion 41B faces the electrode terminal 13 (for example, the negative electrode terminal 13B) of the second battery module 10 from the -X direction side. The tip end portion 42B extends from the base end portion 41B in the -X direction. The tip end portion 42B includes a space into which the tip end portion 42A (the protruding end portion) of the first wiring module 20A is inserted along the X direction. The tip end portion 42B holds the tip end portion 42A (the protruding end portion) of the inserted first wiring module 20A. The tip end portion 42B is an example of a "holding portion".

[0069] An example of the second electrode connection member 40B will be described below. In the present embodiment, the tip end portion 42B includes a support member 44. The support member 44 is a member that supports a leaf spring member 45 described later. The support member 44 has, for example, a first portion 44a, a second portion 44b, and a third portion 44c.

[0070] The first portion 44a is a plate portion along the Y direction and the Z direction. The first portion 44a faces the electrode terminal 13 (for example, the negative electrode terminal 13B) of the second battery module 10 from the -X direction side. The first portion 44a is joined to the electrode terminal 13 of the second battery module 10. The first portion 44a is physically and electrically connected to the electrode terminal 13 of the second battery module 10.

[0071] The second portion 44b is a plate portion along the X direction and the Z direction. The second portion 44b extends in the +X direction from the -Y direction side end of the first portion 44a. In the present embodiment, the second portion 44b extends to the +X direction side beyond the electrode terminal 13 of the second battery module 10. The third portion 44c is a plate portion along the Y direction and the Z direction. The third portion 44c extends in the -Y direction from the +X direction side end of the second portion 44b. The third portion 44c is located on the +X direction side compared to the electrode terminal 13 of the second battery module 10.

[0072] In this embodiment, the tip portion 42B includes a leaf spring member 45. The leaf spring member 45 is joined to the support member 44 and supported by the support member 44. The leaf spring member 45 includes, for example, a pair of clamping portions 45a and 45b, a base portion 45c, and an insertion space 46.

[0073] The base portion 45c is located at the end portion of the leaf spring member 45 on the +X direction side. The base portion 45c extends along the Y direction and the Z direction. The clamping portions 45a and 45b extend from both end portions of the base portion 45c in the Y direction to the -X direction. The clamping portions 45a and 45b are arranged to be spaced apart in the Y direction. The end portions on the +X direction side of each of the clamping portions 45a and 45b are supported by the base portion 45c. The clamping portions 45a and 45b are elastically deformable in the Y direction. For example, the clamping portions 45a and 45b are elastically deformable with respect to the base portion 45c. The insertion space 46 exists between the clamping portions 45a and 45b.

[0074] In this embodiment, when the first wiring module 20A and the second wiring module 20B are connected, the tip portion 42A (projecting end portion) of the first wiring module 20A is inserted between the clamping portions 45a and 45b of the second wiring module 20B. The tip portion 42A of the first wiring module 20A is press-fitted into the depth of the insertion space 46 while elastically deforming the clamping portions 45a and 45b so as to widen the gap (insertion space 46) between the clamping portions 45a and 45b in the Y direction.

[0075] In this case, the tip portion 42A of the first electrode connection member 40A is pressed from both sides in the Y direction by the clamping portions 45a and 45b. Thereby, the first electrode connection member 40A and the second electrode connection member 40B are physically and electrically connected. That is, the first wiring module 20A and the second wiring module 20B are physically and electrically connected. In this embodiment, the plate portion 42p of the tip portion 42A of the first wiring module 20A is clamped from both sides in the Y direction by the clamping portions 45a and 45b. In this embodiment, an example of the electrode connection member set TS is formed by the first electrode connection member 40A and the second electrode connection member 40B.

[0076] In this embodiment, the leaf spring member 45 is joined to the second portion 44b and the third portion 44c of the support member 44 and is supported by the second portion 44b and the third portion 44c of the support member 44. In this embodiment, the base portion 45c of the leaf spring member 45 is located on the +X direction side compared to the electrode terminal 13 of the second battery module 10. The clamping portions 45a and 45b extend long in the -X direction beyond the electrode terminal 13 of the second battery module 10 from the base portion 45c. Such long-extending clamping portions 45a and 45b are more likely to elastically deform in the Y direction than short-extending clamping portions.

[0077] In this embodiment, the width 40W5 in the Z direction of the second electrode connection member 40B is larger than the width 40W6 in the X direction of the second electrode connection member 40B. For example, the width 40W5 in the Z direction of the second electrode connection member 40B is the same as the width 13W1 (or width 13W3) in the Z direction of the electrode terminal 13 of the battery module 10 described above.

[0078] In this embodiment, the second base 30B of the second wiring module 20B has a second engaging portion 70B. The second engaging portion 70B includes, for example, an engaging hole 72 recessed in the +X direction. The protruding portion 71 of the first wiring module 20A is inserted into the engaging hole 72 for engagement (for example, fitting).

[0079] Note that the arrangements of the positive electrode terminal 13A and the negative electrode terminal 13B may be reversed from the above example. That is, the base end portion 41A of the first wiring module 20A may be connected to the negative electrode terminal 13B of the first battery module 10, and the base end portion 41B of the second wiring module 20B may be connected to the positive electrode terminal 13A of the second battery module 10. Also, the arrangements of the first electrode connection member 40A and the second electrode connection member 40B may be reversed from the above example. That is, the first wiring module 20A may have the second electrode connection member 40B, and the second wiring module 20B may have the first electrode connection member 40A. Also, the arrangements of the protruding portion 71 and the engaging hole 72 may be reversed from the above example. That is, the first engaging portion 70A of the first wiring module 20A may have the engaging hole 72, and the second engaging portion 70B of the second wiring module 20B may have the protruding portion 71.

[0080] In this embodiment, the first wiring module 20A and the second wiring module 20B are combined with each other after the first wiring module 20A is attached to the first battery module 10 and the second wiring module 20B is attached to the second battery module 10.

[0081] Next, referring to FIG. 4, the configuration of the electrode connection members 40 of the wiring modules 20C and 20D will be described. The configuration of the electrode connection member 40 of the wiring module 20C may be obtained by reading “-Y direction” and “+Y direction” in the reverse order in the description of the second electrode connection member 40B of the wiring module 20B described above. The configuration of the electrode connection member 40 of the wiring module 20D may be obtained by reading “-Y direction” and “+Y direction” in the reverse order in the description of the first electrode connection member 40A of the wiring module 20A described above. In this embodiment, an example of another connection module set MS is formed by the wiring module 20C and the wiring module 20D.

[0082] Next, referring to FIG. 2, the wiring module 20E will be described. The wiring module 20E is located on the most -X direction side among the plurality of wiring modules 20. The wiring module 20E has an external connection terminal ES connected to an external component of the battery pack 1 (for example, a power supply unit to the vehicle body on which the battery pack 1 is mounted).

[0083] <5. Wiring Module> Next, the wiring module 80 will be described. FIG. 11 is a perspective view showing the wiring module 80. The wiring module 80 is a member for collecting signals obtained from a plurality of wiring modules 20 and transmitting them to the outside. The wiring module 80 includes, for example, a base 81, a plurality of individual connectors 82, a wiring member 83, and a combined connector 84.

[0084] <5.1 Base> The base 81 is a member that serves as the base of the wiring module 80. The base 81 is formed of an insulating material such as synthetic resin and has insulation properties. The base 81 extends in the X direction. The base 81 faces the plurality of wiring modules 20 from the +Z direction side.

[0085] <5.2 Individual connectors> The individual connector 82 is a connection part for connecting to each wiring module 20. The plurality of individual connectors 82 are attached to the surface on the -Z direction side of the base 81. The individual connector 82 is connected to the wiring member 83. The individual connector 82 is arranged at a position corresponding to the connector 62 of each wiring module 20. The individual connector 82 is detachably connected to the connector 62 of each wiring module 20 from the +Z direction.

[0086] <5.3 Wiring member> The wiring member 83 is a member having a wiring 83a (see FIG. 9) for transmitting the signal obtained through the individual connector 82 to the common connector 84. The wiring member 83 is, for example, a flat wiring material. The wiring member 83 is a flexible flat cable (FFC), a flexible printed circuit (FPC), or the like. The wiring member 83 is in a film shape along the X direction and the Y direction. The wiring 83a of the wiring member 83 is electrically connected to the plurality of wirings 53 provided in each of the plurality of wiring modules 20 via the plurality of individual connectors 82.

[0087] <5.4 Common connector> The common connector 84 is a connector that is detachably connected to a signal processing unit that performs signal processing related to the battery pack 1 (for example, a monitoring unit that monitors the state of the battery pack 1). The signal processing unit may exist as a part of the battery pack 1 or as an external device of the battery pack 1. The common connector 84 is arranged, for example, at the end on the +X direction side of the wiring module 80. The common connector 84 transmits the information obtained from the plurality of wiring modules 20 via the plurality of individual connectors 82 to the signal processing unit.

[0088] <6. Other configurations> Next, returning to FIG. 1, the insulating member 91, the end plate 92, and the connecting member 93 will be described.

[0089] <6.1 Insulating member> The plurality of insulating members 91 includes a first insulating member 91A and a second insulating member 91B. Each of the first insulating member 91A and the second insulating member 91B is plate-shaped along the Y direction and the Z direction. The first insulating member 91A and the second insulating member 91B have elasticity. For example, the first insulating member 91A and the second insulating member 91B are formed of an insulating material such as rubber and have elasticity. The first insulating member 91A is disposed on the -X direction side with respect to the plurality of battery modules 10. The second insulating member 91B is disposed on the +X direction side with respect to the plurality of battery modules 10.

[0090] <6.2 End plate> The plurality of end plates 92 includes a first end plate 92A and a second end plate 92B. Each of the first end plate 92A and the second end plate 92B is a plate material along the Y direction and the Z direction. The first end plate 92A and the second end plate 92B are made of, for example, metal and have rigidity. The first end plate 92A is disposed on the -X direction side with respect to the first insulating member 91A. The second end plate 92B is disposed on the +X direction side with respect to the second insulating member 91B.

[0091] <6.3 Connecting member> The plurality of connecting members 93 extend between the first end plate 92A and the second end plate 92B. The plurality of connecting members 93 connect the first end plate 92A and the second end plate 92B. When the first end plate 92A and the second end plate 92B are connected by the connecting member 93, the first end plate 92A applies a pressing force to the plurality of battery modules 10 via the first insulating member 91A. Further, when the first end plate 92A and the second end plate 92B are connected by the connecting member 93, the second end plate 92B applies a pressing force to the plurality of battery modules 10 via the second insulating member 91B. Thereby, the plurality of battery modules 10 are constrained.

[0092] <7. Assembly method> Next, the assembly method of the battery pack 1 will be described. First, the wiring module 20 is attached to the first end portion 11EA and the second end portion 11EB of each battery module 10. Thereby, a battery module assembly AS including one battery module 10 and two wiring modules 20 divided on both sides in the Y direction of the battery module 10 is obtained.

[0093] Next, a plurality of battery module assemblies AS are arranged side by side in the X direction. For example, the tip portion 42A (projecting end portion) of the first electrode connection member 40A of one battery module assembly AS (first battery module assembly) is inserted into the tip portion 42B (holding portion) of the second electrode connection member 40B of another battery module assembly AS (second battery module assembly). At the same time, the protruding portion 71 of the first battery module assembly AS is engaged with the engagement hole 72 of the second battery module assembly AS.

[0094] Next, by attaching the plurality of insulating members 91, the plurality of end plates 92, and the plurality of connecting members 93, the plurality of battery module assemblies AS are constrained in a stacked state. Next, two wiring modules 80 are attached to the plurality of battery module assemblies AS. Thereby, the battery pack 1 is completed.

[0095] <8. Modification Example> Next, several modification examples will be described. In each modification example, the configuration other than that described below is the same as the configuration of the above-described embodiment.

[0096] <8.1 First Modification Example: Cell Balancing Circuit> FIG. 12 is an electric circuit diagram showing the configuration of the wiring module 20 of the first modification example. In this modification example, the wiring module 20 has a cell balancing circuit 110. The cell balancing circuit 110 is a circuit that corrects the deviation in the stored power of a plurality of battery cells 12. The cell balancing circuit 110 has, for example, a plurality of discharge units 111. The discharge unit 111 is electrically connected between two adjacent voltage detection terminals 14. The discharge unit 111 includes, for example, a resistor 111a and a transistor 111b. The transistor 111b is electrically connected in series with the resistor 111a. The transistor 111b is switched between a conductive state and a non-conductive state based on a control signal received from the signal processing unit via the wiring module 80 so as to equalize the voltages or remaining capacities of the plurality of battery cells 12.

[0097] Each of the resistor 111a and the transistor 111b is a component used in relation to the battery module 10. The discharge unit 111 (resistor 111a and transistor 111b) is provided, for example, in the main body portion 51 of the wiring member 50. Each of the resistor 111a and the transistor 111b is an example of an "electronic component". When the discharge unit 111 is formed by one chip component (integrated circuit component), the chip component is an example of an "electronic component".

[0098] <8.2 Second Modification Example: Signal Processing Unit> FIG. 13 is an electrical circuit diagram showing the configuration of the wiring module 20 of the second modification. In this modification, the wiring module 20 has a signal processing unit 120. The signal processing unit 120 is a functional unit that performs processing related to the signal flowing through the wiring 53 of the wiring module 20. For example, the signal processing unit 120 is electrically connected between a plurality of voltage detection terminals 14 and a connector 62. The signal processing unit 120 includes, for example, one or more chip components (integrated circuit components) 121 that perform signal processing. The signal processing unit 120 (chip component 121) is provided, for example, on the main body 51 of the wiring member 50. The chip component 121 is a component used in association with the battery module 10. The chip component 121 is an example of an "electronic component".

[0099] In this modification, the signal processing unit 120 performs processing related to the signal flowing from each voltage detection terminal 14 to the wiring 53. For example, the signal processing unit 120 detects the voltage value of the battery cell 12 based on the magnitude of the voltage applied from each voltage detection terminal 14 to the wiring 53. The signal processing unit 120 generates a signal indicating the detected voltage value of the battery cell 12.

[0100] Also, the signal processing unit 120 performs processing related to the signal flowing from the thermistor 61 to the wiring 53. For example, the signal processing unit 120 detects the temperature value of the battery cell 12 based on the voltage difference across the thermistor 61. The signal processing unit 120 generates a signal indicating the detected temperature value of the battery cell 12.

[0101] In this modification, the signal processing unit 120 includes a communication circuit unit 130. The communication circuit unit 130 is a circuit having a communication function with a signal processing unit. The communication circuit unit 130 converts a signal generated by the signal processing unit 120 (for example, a signal indicating the voltage value of the battery cell 12 and / or a signal indicating the temperature value of the battery cell 12) into a signal suitable for data communication such as a packet. The communication circuit unit 130 transmits the converted signal to the signal processing unit via the connector 62 and the wiring module 80 by data communication.

[0102] The communication circuit unit 130 includes, for example, one or more chip components (integrated circuit components) 131 that perform communication processing. The communication circuit unit 130 (chip component 131) is provided, for example, on the main body portion 51 of the wiring member 50. The chip component 131 is a component used in relation to the battery module 10. The chip component 131 is an example of an "electronic component".

[0103] In this modified example, the signal processing unit 120 is connected to the connector 62 via one or more wirings 54. The number of wirings 54 between the signal processing unit 120 and the connector 62 is smaller than the number of wirings 53 between the signal processing unit 120 and the plurality of voltage detection terminals 14. The communication circuit unit 130 sequentially transmits signals indicating the voltage values of the plurality of voltage detection terminals 14 (the plurality of battery cells 12) at different timings. The communication circuit unit 130 outputs signals indicating the voltage values of the plurality of voltage detection terminals 14 (the plurality of battery cells 12) to the signal processing unit via a number of wirings 54 that is smaller than the number of the plurality of voltage detection terminals 14.

[0104] Note that the signal processing by the signal processing unit 120 is not limited to the above-described example. For example, instead of / In addition to the above example, the signal processing unit 120 may generate a control signal for operating the cell balance circuit 110 based on the magnitude of the voltage applied from each voltage detection terminal 14 to the wiring 53, and output the generated control signal to the cell balance circuit 110. Also, the signal processing by the signal processing unit 120 may be noise removal, averaging processing, or comparison with a preset threshold value of a signal obtained from the electrode terminal 13, the voltage detection terminal 14, or the thermistor 61.

[0105] <8.3 Third Modified Example: First Alternative Aspect of Electrode Connection Member> FIG. 14 is a side view showing a first wiring module 20A and a second wiring module 20B according to a third modification. In this modification, the tip portion 42B of the second electrode connection member 40B has a leaf spring member 45. The leaf spring member 45 includes a pair of sandwiching portions 45a, 45b, a base portion 45c, and an insertion space 46. The sandwiching portion 45a is plate-shaped along the X direction and the Z direction. On the other hand, the sandwiching portion 45b is folded back toward the inside of the insertion space 46. The sandwiching portion 45b is elastically deformable in the Y direction. For example, the sandwiching portion 45b is elastically deformable in the Y direction with respect to the base portion 45c.

[0106] In this modification, the tip portion 42A of the first wiring module 20A is press-fitted into the depth of the insertion space 46 while elastically deforming the sandwiching portion 45b so as to widen the gap (insertion space 46) between the sandwiching portions 45a and 45b in the Y direction. In this case, the tip portion 42A of the first wiring module 20A is pressed from both sides in the Y direction by the sandwiching portions 45a and 45b. For example, the plate portion 42p of the tip portion 42A of the first wiring module 20A is sandwiched from both sides in the Y direction by the sandwiching portions 45a and 45b.

[0107] In this modification, the sandwiching portion 45b has, for example, one or more (for example, a plurality of) slits SL. The plurality of slits SL are arranged at intervals in the Z direction. Each of the plurality of slits SL extends from the -X direction end of the sandwiching portion 45b in the +X direction. When the slit SL is provided, even when the first electrode connection member 40A is inclined with respect to the second electrode connection member 40B, the sandwiching portion 45b can be elastically deformed according to the inclination of the first electrode connection member 40A. When the sandwiching portion 45b can be elastically deformed according to the inclination of the first electrode connection member 40A, the first electrode connection member 40A and the second electrode connection member 40B are more likely to be firmly connected.

[0108] <8.4 Fourth Modification: Second Alternative Aspect of Electrode Connection Member> FIG. 15 is a side view showing the first wiring module 20A and the second wiring module 20B of the fourth modification. The first wiring module 20A has a first electrode connection member 40A' as the electrode connection member 40. The first electrode connection member 40A' is, for example, a male engagement member. The first electrode connection member 40A' is, for example, a plate member along the X direction and the Z direction. The first electrode connection member 40A' has a tip portion 42A' protruding in the +X direction. The tip portion 42A' includes a plate portion 42p along the X direction and the Z direction. The tip portion 42A' is an example of a "protruding end portion".

[0109] The second wiring module 20B has a second electrode connection member 40B' as the electrode connection member 40. The second electrode connection member 40B' is, for example, a female engagement member. The second electrode connection member 40B' includes, for example, a cylindrical tip portion 42B' having a space into which the tip portion 42A' of the first electrode connection member 40A' is inserted. The tip portion 42B' holds the tip portion 42A (protruding end portion) of the inserted first wiring module 20A. The tip portion 42B' is an example of a "holding portion".

[0110] In this modification, the tip portion 42B' has a cylindrical portion 140 with a split. That is, the tip portion 42B' has a plurality of slits SL. Each of the plurality of slits SL extends in the +X direction from a first end 140a which is the -X direction side end of the tip portion 42B'. By having the plurality of slits SL, the tip portion 42B' is easily elastically deformed toward the outer peripheral side of the cylindrical portion 140. For example, the tip portion 42B' is elastically deformable at least in the Y direction. In this modification, the tip portion 42B' is elastically deformable in the Y direction and the Z direction. The cylindrical portion 140 includes, for example, a pair of clamping portions 45a, 45b, a base portion 45c, and an insertion space 46.

[0111] In this modification example, when the first wiring module 20A and the second wiring module 20B are connected, the tip portion 42A'(projecting end portion) of the first wiring module 20A expands the cylindrical tip portion 42B'(holding portion) of the second wiring module 20B to the outer peripheral side (for example, expands the gap between the clamping portions 45a and 45b in the Y direction), and is press-fitted toward the depth of the insertion space 46 while elastically deforming the tip portion 42B'. In this case, the tip portion 42A' of the first wiring module 20A is pressed from the outer peripheral side by the tip portion 42B' (for example, pressed from both sides in the Y direction by the clamping portions 45a and 45b). Thereby, the first wiring module 20A and the second wiring module 20B are physically and electrically connected. The plate portion 42p of the tip portion 42A' of the first wiring module 20A is clamped from both sides in the Y direction by the clamping portions 45a and 45b.

[0112] <9. Advantages> <9.1 Advantages from the First Perspective> As a comparative example, consider a configuration in a battery pack in which a plurality of battery modules are arranged side by side, each battery module has a plurality of detection terminals, and individual electrical connection components are attached to each of the plurality of detection terminals. In the configuration of this comparative example, the operation of attaching individual electrical connection components to each of the plurality of detection terminals becomes complicated, and the assemblability of the battery pack may decrease. This tendency may become prominent when the number of battery modules included in one battery pack increases as the battery pack becomes larger in capacity.

[0113] On the one hand, in the present embodiment, the wiring module 20 includes an insulating substrate 30 and a wiring member 50. The substrate 30 is arranged so as to face the first end portion 11EA in the second direction of one battery module 10 included in the plurality of battery modules 10, where the direction in which the plurality of battery modules 10 are arranged is defined as the first direction, and the direction different from the first direction is defined as the second direction. The wiring member 50 includes a main body portion 51 supported by the substrate 30, and a plurality of terminal connection portions 52A that branch from the main body portion 51 and extend individually to be connected to a plurality of detection terminals (for example, voltage detection terminals 14) provided at the first end portion 11EA of the battery module 10. According to such a configuration, even when the battery module 10 has a plurality of detection terminals, electrical connection to the plurality of detection terminals can be realized by one wiring member 50. When electrical connection to the plurality of detection terminals can be realized by one wiring member 50, the assembly workability of the battery pack 1 can be improved as compared with the case where individual electrical connection components are attached to each of the plurality of detection terminals.

[0114] In the present embodiment, the plurality of voltage detection terminals 14 include three or more detection terminals arranged in parallel. The plurality of terminal connection portions 52A include three or more terminal connection portions 52A that are individually connected to the three or more detection terminals. According to such a configuration, even when there are three or more detection terminals arranged in parallel, electrical connection to the three or more detection terminals can be easily realized.

[0115] In the present embodiment, the substrate 30 has a plurality of partition walls 34 that electrically insulate between the plurality of detection terminals. The plurality of terminal connection portions 52A are divided and extend inside a plurality of regions R defined by the plurality of partition walls 34. According to such a configuration, the plurality of terminal connection portions 52A can be divided and extend inside the plurality of regions R defined by the plurality of partition walls 34. When the plurality of terminal connection portions 52A can be divided and extend inside the plurality of regions R, insulation between the plurality of terminal connection portions 52A can be ensured at a higher level.

[0116] In this embodiment, the plurality of detection terminals are arranged side by side in a third direction different from the first direction and the second direction. The plurality of terminal connection portions 52A are arranged so as to individually face the plurality of detection terminals from the first direction. According to such a configuration, the direction in which the plurality of detection terminals are arranged is different from the direction in which the plurality of terminal connection portions 52A are connected to the plurality of detection terminals. When these directions are different, for example, compared with the case where the detection terminal and the terminal connection portion 52A are connected in the third direction, the gap between the plurality of detection terminals can be reduced. When the gap between the plurality of detection terminals can be reduced, it becomes easier to miniaturize the battery pack 1.

[0117] In this embodiment, the main body portion 51 of the wiring member 50 is arranged so as to face the base body 30 from the second direction. The plurality of terminal connection portions 52A are bent from the main body portion 51 and arranged so as to individually face the plurality of detection terminals from the first direction. According to such a configuration, the main body portion 51 having a larger area compared to the terminal connection portion 52A can be arranged along the first direction. When the main body portion 51 can be arranged along the first direction, it becomes easier to miniaturize the battery pack 1.

[0118] In this embodiment, the wiring module 20 has an electrode connection member 40. The electrode connection member 40 includes a base end portion 41 electrically connected to the electrode terminal 13 of the battery module 10 and a tip end portion 42 electrically connected to the electrode terminal 13 of another battery module 10. And the wiring member 50 further has a terminal connection portion 52B connected to the electrode connection member 40. According to such a configuration, the terminal connection portion 52B connected to the electrode connection member 40 and the plurality of terminal connection portions 52A connected to the plurality of detection terminals can be realized by one wiring member 50. When the terminal connection portion 52B and the plurality of terminal connection portions 52A can be realized by one wiring member 50, further improvement in the assembly workability of the battery pack 1 can be achieved.

[0119] In this embodiment, the wiring module 20 further includes a thermistor 61 for detecting the temperature associated with the battery module 10. The wiring member 50 further has a thermistor connection portion 52C connected to the thermistor 61. According to such a configuration, the thermistor connection portion 52C and the plurality of terminal connection portions 52A can be realized by one wiring member 50. When the thermistor connection portion 52C and the plurality of terminal connection portions 52A can be realized by one wiring member 50, the assembly workability of the battery pack 1 can be further improved.

[0120] In this embodiment, the wiring module 20 further includes a connector 62 that is supported by the base 30 and to which the wiring module 80 is detachably connected. The main body portion 51 is connected to the connector 62. According to such a configuration, the assembly workability of the battery pack 1 can be improved inside the wiring module 20 attached to each battery module 10.

[0121] Note that in this first aspect, no electronic components need to be provided on the wiring member 50. Further, the electrode terminals 13 of the plurality of battery modules 10 may be connected using a connection structure by bolt fastening.

[0122] <9.2 Advantages in the Second Aspect> As a comparative example, consider a configuration in a battery pack including a plurality of battery modules, in which the electronic components used in relation to each battery module are collectively arranged in the signal processing unit (for example, a monitoring device) of the battery pack. In the configuration of this comparative example, the wiring between each battery module and the signal processing unit becomes complicated, and / or the signal processing unit (for example, a monitoring device) tends to be enlarged because the electronic components are arranged together, so it may be difficult to miniaturize the battery pack. This tendency can become prominent when the number of battery modules included in one battery pack increases as the battery pack has a larger capacity.

[0123] On the one hand, in the present embodiment, the wiring module 20 includes an insulating substrate 30, a wiring member 50, and electronic components. When the direction in which a plurality of battery modules 10 are arranged is defined as the first direction and the direction different from the first direction is defined as the second direction, the substrate 30 is arranged to face the first end portion 11EA in the second direction of one battery module 10 included in the plurality of battery modules 10. The wiring member 50 includes a main body portion 51 supported by the substrate 30 and a terminal connection portion 52A (or terminal connection portion 52B) that extends from the main body portion 51 and is connected to a detection terminal provided at the first end portion 11EA of the battery module 10. The electronic components are provided on the wiring member 50 and are used in relation to the battery module 10. According to such a configuration, by arranging the electronic components using the wiring module 20, the wiring between the wiring module 20 and a signal processing unit (for example, a monitoring device) can be simplified and / or the situation where many electronic components are collectively arranged in the signal processing unit (for example, a monitoring device) can be suppressed. As a result, it becomes easier to reduce the size of the battery pack 1. Note that the simplification of the wiring includes, for example, reduction in the number of wirings, simplification of the wiring layout, or deletion or reduction of the protection function.

[0124] In the present embodiment, the electronic components are electrically connected to the detection terminals of the battery module 10 via the terminal connection portion 52A (or terminal connection portion 52B). According to such a configuration, processing or operations related to the state of the detection terminals of the battery module 10 can be performed near the battery module 10. If such processing or operations can be performed near the battery module 10, the wiring between the wiring module 20 and the signal processing unit can be further simplified. As a result, it becomes even easier to reduce the size of the battery pack 1.

[0125] In this embodiment, the wiring module 20 further includes a connector 62 to which the layout module 80 of the battery pack 1 is detachably connected. The electronic component is electrically connected between the terminal of the battery module 10 and the connector 62. According to such a configuration, the wiring between the wiring module 20 and the signal processing unit can be simplified, and thus the layout module 80 can be simplified. Note that the simplification of the wiring module means, for example, reduction in the number of wirings in the wiring module, simplification of the wiring layout, or deletion or reduction of the protection function.

[0126] In this embodiment, the main body portion 51 of the wiring member 50 is arranged to face the base body 30 from the second direction. The terminal connection portion 52A is bent from the main body portion 51 and arranged to face the detection terminal of the battery module 10 from the first direction. The electronic component is provided on the main body portion 51 of the wiring member 50. According to such a configuration, by arranging the electronic component using the second direction in which a spatial margin is likely to occur compared to the first direction, even when an electronic component is provided in the wiring module 20, it is easy to suppress the increase in size of the wiring module 20. Further, since the electronic component is provided on the main body portion 51, the electronic component can be stably mounted as compared with the case where the electronic component is provided on the terminal connection portion 52A.

[0127] In this embodiment, the electronic component is a fuse component 63 electrically connected to the detection terminal of the battery module 10. According to such a configuration, since a protection function related to the state of the detection terminal of the battery module 10 can be provided near the battery module 10, it is easier to further simplify the wiring between the wiring module 20 and the signal processing unit.

[0128] In this embodiment, the wiring module 20 further includes a cell balance circuit 110 provided in the wiring member 50. The electronic component is a component (for example, resistor 111a or transistor 111b) included in the cell balance circuit 110. According to such a configuration, since the cell balance circuit 110 corresponding to each battery module 10 can be provided near the battery module 10, the wiring between the wiring module 20 and the signal processing unit can be more easily simplified.

[0129] In this embodiment, the wiring module 20 further includes an information processing unit 120 provided in the wiring member 50 that performs processing related to a signal obtained from the detection terminal of the battery module 10. The electronic component is a component included in the information processing unit 120. According to such a configuration, according to such a configuration, since the signal processing corresponding to each battery module 10 can be realized near the battery module 10, the wiring between the wiring module 20 and the signal processing unit can be more easily simplified.

[0130] In this embodiment, the wiring module 20 further includes a communication circuit unit 130 that converts and transmits a signal obtained from the detection terminal of the battery module 10. The electronic component is a component included in the communication circuit unit 130. According to such a configuration, the information detected inside the wiring module 20 can be transmitted by data communication. Therefore, it is easy to reduce the number of wirings between the wiring module 20 and the signal processing unit.

[0131] Note that in this second aspect, the wiring member 50 does not necessarily have a plurality of terminal connection portions 52A branched from each other. Also, the electrode terminals 13 of the plurality of battery modules 10 may be connected using a connection structure by bolt fastening.

[0132] <9.3 Advantages in the Third Aspect> As a comparative example, consider a configuration in which, in a battery pack in which a plurality of battery modules are arranged in the first direction, when connecting the electrodes of the plurality of battery modules to each other, a connection structure is realized by performing bolt fastening from a direction different from the first direction. In the configuration of this comparative example, the operation of connecting the electrodes of the plurality of battery modules to each other by bolt fastening becomes complicated, and there is a possibility that the assembly workability of the battery pack may decrease. This tendency may become prominent when the number of battery modules included in one battery pack increases as the battery pack increases in size.

[0133] On the other hand, in the present embodiment, the connection module set MS is a member set used for the battery pack 1 including the first battery module 10 and the second battery module 10 adjacent to the first battery module 10 in the first direction. The connection module set MS has a first wiring module 20A and a second wiring module 20B. The first wiring module 20A includes an insulating first base 30A and a first electrode connection member 40A supported by the first base 30A. The first base 30A is disposed to face the first end portion 11EA of the first battery module 10. The first electrode connection member 40A includes a base end portion 41A electrically connected to the first electrode terminal 13 of the first battery module 10 and a tip end portion 42A (projecting end portion) projecting in the first direction. The second wiring module 20B includes an insulating second base 30B and a second electrode connection member 40B supported by the second base 30B. The second base 30B is disposed to face the first end portion 11EA of the second battery module 10. The second electrode connection member 40B includes a base end portion 41B electrically connected to the second electrode terminal 13 of the second battery module 10 and a tip end portion 42B (holding portion) into which the tip end portion 42A (projecting end portion) of the first electrode connection member 40A is inserted and held. According to such a configuration, as the two battery modules 10 are arranged side by side in the first direction, the first electrode connection member 40A is held by the second electrode connection member 40B. When such a holding structure is provided, the assembly workability of the battery pack 1 can be improved as compared with the case where such a holding structure is not provided.

[0134] In this embodiment, the tip 42B (holding portion) of the second electrode connection member 40B has a portion that can be elastically deformed in a direction intersecting the first direction, and holds the tip 42A (projecting end portion) of the first electrode connection member 40A. According to such a configuration, at least a part of the tip 42B (holding portion) of the second electrode connection member 40B elastically deforms, so that the tip 42A of the first electrode connection member 40A is held more firmly. When the tip 42A of the first electrode connection member 40A is held more firmly, it becomes easier to further improve the assembly workability of the battery pack 1. Note that in the present disclosure, the "direction intersecting the first direction (for example, the X direction)" is not limited to the second direction (for example, the Y direction), and may be the third direction (for example, the Z direction).

[0135] In this embodiment, the tip 42B (holding portion) of the second electrode connection member 40B is elastically deformable at least in the second direction, and includes sandwiching portions 45a and 45b that sandwich the tip 42A (projecting end portion) of the first electrode connection member 40A from both sides in the second direction. According to such a configuration, the tip 42A (projecting end portion) of the first electrode connection member 40A is sandwiched and is less likely to come off, so that it becomes easier to further improve the assembly workability of the battery pack 1.

[0136] In this embodiment, when the direction intersecting the first direction and the second direction is defined as the third direction, the tip 42A (projecting end portion) of the first electrode connection member 40A includes a plate portion 42p along the first direction and the third direction. The sandwiching portions 45a and 45b sandwich the plate portion 42p from both sides in the second direction. According to such a configuration, it is possible to largely secure the connection structure between the tip 42A of the first electrode connection member 40A and the sandwiching portions 45a and 45b while suppressing an increase in the width of the battery pack 1 in the Y direction.

[0137] In this embodiment, the tip portion 42B (holding portion) of the second electrode connection member 40B includes a cylindrical portion 140. The cylindrical portion 140 includes a first end 140a on the side of the first wiring module 20A and a plurality of slits SL each extending from the first end 140a in a direction away from the first wiring module 20A. According to such a configuration, a structure for holding the tip portion 42A (projecting end portion) of the first electrode connection member 40A by the cylindrical portion 140 having the slits SL can be realized.

[0138] In this embodiment, one of the first base 30A and the second base 30B includes a projecting portion 71 projecting in the first direction. The other of the first base 30A and the second base 30B includes an engagement hole 72 into which the projecting portion 71 is inserted. According to such a configuration, in addition to the connection between the first electrode connection member 40A and the second electrode connection member 40B, the first base 30A and the second base 30B are engaged with each other, so that a more stable assembly operation becomes possible.

[0139] In this embodiment, the first wiring module 20A and the second wiring module 20B are combined with each other after the first wiring module 20A is attached to the first battery module 10 and the second wiring module 20B is attached to the second battery module 10. According to such a configuration, the connection between the first electrode connection member 40A and the second electrode connection member 40B can be performed as part of the operation of arranging a plurality of battery modules 10 in the first direction.

[0140] Note that, from this third aspect, the wiring member 50 does not necessarily have a plurality of terminal connection portions 52A branched from each other. Also, electronic components do not necessarily need to be provided on the wiring member 50.

[0141] The above-described embodiments and a plurality of modification examples have been explained. However, the embodiments and modification examples are not limited to the examples described above. For example, the above-described modification examples may be combined with each other and implemented. Further, in the above-described embodiment, the battery module 10 is a bipolar type battery module. Instead of this, the battery module 10 may be a monopolar type battery module. Also, the first wiring module 20A may not have the base body 30. That is, the first electrode connection member 40A may be directly attached to the battery module 10. Further, the second wiring module 20B may not have the base body 30. That is, the second electrode connection member 40B may be directly attached to the battery module 10.

Explanation of Signs

[0142] 1…Battery pack 10…Battery module 11…Case 12…Battery cell 13…Electrode terminal (detection terminal) 13A…Positive electrode terminal (detection terminal) 13B…Negative electrode terminal (detection terminal) 14…Voltage detection terminal (detection terminal) 20, 20A, 20B, 20C, 20D, 20E…Wiring module 30…Base body 30A…First base body 30B…Second base body 34…Partition wall 40…Electrode connection member 40A…First electrode connection member 40B…Second electrode connection member 41…Base end portion of electrode connection member 41A…Base end portion of first electrode connection member 41B…Base end portion of second electrode connection member 42…Tip end portion of electrode connection member 42A…Tip end portion (projecting end portion) of first electrode connection member 42B…Tip end portion (holding portion) of second electrode connection member 45a, 45b…Clamping portion 50…Wiring member 51... Body part 52A, 52B... Terminal connection parts 53... Wiring 61... Thermistor 62... Connector 63... Fuse component 110... Cell balance circuit 111... Discharge part (electronic component) 111a... Resistor (electronic component) 111b... Transistor (electronic component) 120... Information processing unit 121... Chip component (electronic component) 130... Communication circuit unit 131... Chip component (electronic component)

Claims

1. A member set used in a battery pack including a first battery module and a second battery module adjacent to the first battery module in a first direction, wherein a direction intersecting the first direction is a second direction, a first connection module including an insulating first base disposed opposite an end of the first battery module in the second direction and a first electrode connection member supported by the first base, the first electrode connection member including a base end electrically connected to a first electrode terminal of the first battery module and a protruding end protruding in the first direction; a second connection module having an insulating second base disposed opposite an end of the second battery module in the second direction, and a second electrode connection member supported by the second base, the second electrode connection member including a base end electrically connected to a second electrode terminal of the second battery module, and a holding portion into which the protruding end of the first electrode connection member of the first connection module is inserted from the first direction and held; A connection module set with

2. The holding portion has a portion that is elastically deformable in a direction intersecting the first direction and holds the protruding end portion. The connection module set according to claim 1 .

3. The holding portion is elastically deformable at least in the second direction and includes a clamping portion that clamps the protruding end portion from both sides in the second direction.

3. A connection module set according to claim 1 or 2.

4. When a direction intersecting the first direction and the second direction is a third direction, The protruding end portion includes a plate portion extending along the first direction and the third direction, The clamping portion clamps the plate portion from both sides in the second direction. The connection module set according to claim 3 .

5. The holding portion includes a cylindrical portion, the cylindrical portion includes a first end on the first connection module side and a plurality of slits each extending from the first end in a direction away from the first connection module; 3. A connection module set according to claim 1 or 2.

6. one of the first base and the second base includes a protrusion protruding in the first direction, the other of the first base and the second base includes an engagement hole into which the protrusion is inserted from the first direction; 3. A connection module set according to claim 1 or 2.

7. the first connection module and the second connection module are assembled together after the first connection module is attached to the first battery module and the second connection module is attached to the second battery module; 3. A connection module set according to claim 1 or 2.

8. A member set used in a battery pack including a first battery module and a second battery module adjacent to the first battery module in a first direction, wherein a direction intersecting the first direction is a second direction, a first electrode connection member including a base end portion overlapping one end portion of the first battery module when viewed from the second direction and electrically connected to a first electrode terminal of the first battery module, and a protruding end portion protruding in the first direction; a second electrode connection member including a base end portion overlapping one end portion of the second battery module when viewed from the second direction and electrically connected to a second electrode terminal of the second battery module, and a holding portion having a portion elastically deformable in a direction intersecting the first direction, into which the protruding end portion of the first electrode connection member is inserted from the first direction and held; An electrode connecting member set comprising:

9. A first battery module; a second battery module adjacent to the first battery module in a first direction; a first connection module including an insulating first base disposed opposite an end of the first battery module in the second direction when a direction intersecting the first direction is defined as a second direction, and a first electrode connection member supported by the first base, the first electrode connection member including a base end electrically connected to a first electrode terminal of the first battery module and a protruding end protruding in the first direction; a second connection module having an insulating second base disposed opposite an end of the second battery module in the second direction, and a second electrode connection member supported by the second base, the second electrode connection member including a base end electrically connected to a second electrode terminal of the second battery module, and a holding portion into which the protruding end of the first electrode connection member of the first connection module is inserted from the first direction and held; A battery pack equipped with

Images