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

Abstract

A connection module group according to one embodiment includes a first connection module and a second connection module. The first connection module has a first electrode connection member. 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 a second electrode connection member. The second electrode connection member includes: a base end portion electrically connected to a second electrode terminal of a second battery module; and a holding part that holds the protruding end part of the first electrode connection member of the first connection module by inserting the protruding end part from the first direction.

Description

Technical Field

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

[0002] A battery pack having a plurality of battery modules arranged side by side is known. In addition, as a structure for preventing corrosion on the surface of a bus bar, a structure as follows is proposed: in a metal covering formed by joining a first metal plate composed of an aluminum plate and a second metal plate composed of a metal different from the first metal plate, the first metal plate has an embedding groove, and the second metal plate has an embedding protrusion embedded in the embedding groove.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-82395

[0006] Patent Document 2: Japanese Patent Application Publication No. 2015-187909 Summary of the invention

[0007] Technical problem to be solved by the invention

[0008] However, when electrodes of a plurality of battery modules are connected to each other by a connection structure using bolt fastening, it may be difficult to improve assembly workability.

[0009] One embodiment of the present invention provides a connection module group, an electrode connection member group, and a battery pack that are suitable for improving assembly workability of a battery pack.

[0010] Technical means for solving technical problems

[0011] A connection module group according to one embodiment of the present invention is a component group used for a battery pack, the 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 group includes a first connection module and a second connection module. The first connection module includes: an insulating first substrate, which is arranged opposite to the end of the first battery module in the second direction when a direction intersecting the first direction is set as a second direction; and a first electrode connection member supported by the first substrate. The first electrode connection member includes: a base end portion, which is electrically connected to a first electrode terminal of the first battery module; and a protruding end portion, which protrudes in the first direction. The second connection module includes: an insulating second substrate, which is arranged opposite to the second end of the second battery module; and a second electrode connection member supported by the second substrate. The second electrode connecting member includes a base end portion electrically connected to a second electrode terminal of the second battery module, and a holding portion that inserts the protruding end portion of the first electrode connecting member of the first connection module from the first direction and holds the protruding end portion.

[0012] An electrode connection member group according to one embodiment of the present invention is a member group used for a battery pack, the 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 group includes a first electrode connection member and a second electrode connection member. The first electrode connection member includes: a base end portion, which overlaps with one end portion of the first battery module when viewed from the second direction when a direction intersecting the first direction is taken as a second direction, and is electrically connected to a first electrode terminal of the first battery module; and a protruding end portion, which protrudes in the first direction. The second electrode connection member includes: a base end portion, which 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 retaining portion having a portion that can be elastically deformed in a direction intersecting the first direction, and inserts and retains the protruding end portion of the first electrode connection member from the first direction.

[0013] A battery pack according to one 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. The first connection module includes: an insulating first substrate, which is arranged opposite to the end of the first battery module in the second direction when a direction intersecting the first direction is taken as a second direction; and a first electrode connection member supported by the first substrate. 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 substrate, which is arranged opposite to the second end of the second battery module; and a second electrode connection member supported by the second substrate. The second electrode connecting member includes a base end portion electrically connected to a second electrode terminal of the second battery module, and a holding portion that inserts the protruding end portion of the first electrode connecting member of the first connection module from the first direction and holds the protruding end portion.

[0014] Effects of the Invention

[0015] According to one embodiment of the present invention, it is possible to provide a connection module group, an electrode connection member group, and a battery pack that can improve the assembling workability of a battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a perspective view showing the overall structure of a battery pack according to an embodiment.

[0017] Figure 2 This is a perspective view showing a partial exploded structure of a battery pack according to an embodiment.

[0018] Figure 3 It is a front view showing a battery module according to the embodiment.

[0019] Figure 4 yes Figure 2 sectional view of the battery pack along line F4 - F4 shown in FIG.

[0020] Figure 5 It is a side view showing the wiring module according to the embodiment.

[0021] Figure 6 It is a perspective view showing a wiring module according to the embodiment.

[0022] Figure 7 It is a perspective view showing a wiring member, a thermistor, and a connector according to the embodiment.

[0023] Figure 8It is a perspective view for explaining the connection structure of the terminal connection part according to the embodiment.

[0024] Fig. 9 This is a circuit diagram showing the configuration of a wiring module according to the embodiment.

[0025] Fig.10 It is a side view showing two wiring modules according to the embodiment.

[0026] Fig.11 It is a perspective view showing a layout module according to the embodiment.

[0027] Fig.12 This is a circuit diagram showing the configuration of a wiring module according to a first modified example of the embodiment.

[0028] Fig.13 It is a circuit diagram showing the configuration of a wiring module according to a second modified example of the embodiment.

[0029] Fig.14 It is a side view showing two wiring modules according to a third modified example of the embodiment.

[0030] Fig.15 It is a side view showing two wiring modules according to a fourth modified example of the embodiment. DETAILED DESCRIPTION

[0031] Hereinafter, the embodiments will be described with reference to the accompanying drawings. In the following description, the same reference numerals are used for structures having the same or similar functions. In addition, repeated descriptions of these structures may be omitted. In the present disclosure, terms are defined as follows. The so-called "connection" is not limited to mechanical connection, but may include electrical connection. That is, the so-called "connection" is not limited to the case where two elements as connection objects are directly connected, but may also include the case where two elements as connection objects are connected with another element interposed therebetween. The so-called "supported" is not limited to the case where it is supported by direct contact, but may also include the case where another element is interposed therebetween.

[0032] In the present disclosure, the +X direction, the −X direction, the +Y direction, the −Y direction, the +Z direction, and the −Z direction are defined as follows. The +X direction is a direction from a battery module 10A to a battery module 10B (see Figure 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 11EA to the second end 11EB of the battery module 10 described later (see Figure 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 a direction from the battery module 10 to the layout module 80 described later (see Figure 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".

[0033] (Implementation Method)

[0034] <1. Overall structure of the battery pack>

[0035] Figure 1 1 is a perspective view showing the overall structure of a battery pack 1 according to an embodiment. The battery pack 1 includes, for example, a plurality of battery modules 10, a plurality of wiring modules 20, two wiring modules 80, two insulating members 91, two end plates 92, and a plurality of connecting members 93. In addition, the battery pack 1 may further include an outer frame member for housing these members.

[0036] <2. Battery module>

[0037] First, the battery module 10 will be described.

[0038] Figure 2 1 is a perspective view showing a part of the battery pack 1 in an exploded manner. A plurality of battery modules 10 are arranged side by side in the X direction. Each battery module 10 is a structure having a plurality of battery cells 12 built therein. In the present embodiment, the battery module 10 is a bipolar battery module. Each battery module 10 has, for example, a housing 11, a plurality of battery cells 12, and a positive electrode terminal 13A (see Figure 3 )、Negative electrode terminal 13B (refer to Figure 3 ), and a plurality of voltage detection terminals 14 (refer to Figure 3 ).

[0039] <2.1 Housing>

[0040] The housing 11 is a container for accommodating a plurality of battery cells 12. The housing 11 has a flat rectangular shape. The housing 11 has six end faces. The housing 11 is configured so that the end face (main face) with the largest area among the six end faces is along the Y direction and the Z direction. The longitudinal direction of the housing 11 is, for example, the Y direction.

[0041] In the present embodiment, the housing 11 has a first end 11EA and a second end 11EB as ends in the Y direction. The first end 11EA is an end on the -Y direction side. The first end 11EA is an example of the "first end of the battery module". Hereinafter, for the sake of convenience, the first end 11EA of the housing 11 may be referred to as the "first end 11EA of the battery module 10". On the other hand, the second end 11EB is an end on the +Y direction side. The second end 11EB is an example of the "second end of the battery module". Hereinafter, for the sake of convenience, the second end 11EB of the housing 11 may be referred to as the "second end 11EB of the battery module 10". In addition, hereinafter, when the first end 11EA and the second end 11EB are not distinguished, they are simply referred to as "end 11E".

[0042] <2.2 Battery Unit>

[0043] The plurality of battery cells 12 are built into the housing 11. For example, the plurality of battery cells 12 are arranged side by side in the X direction inside the housing 11. The plurality of battery cells 12 are electrically connected in series. In this embodiment, two battery cells 12 adjacent to each other in the X direction share one current collector that functions as a bipolar electrode. Figure 2 In the figure, five battery cells 12 are shown for ease of explanation, but more battery cells 12 may actually be configured.

[0044] <2.3 Positive electrode terminal>

[0045] Figure 3 : is a front view showing the battery module 10. The positive electrode terminal 13A is a terminal (total positive terminal) on the positive side of the plurality of battery cells 12 included in the battery module 10 that are electrically connected in series. The positive electrode terminal 13A is an example of a "first electrode terminal". The positive electrode terminal 13A protrudes to the outside of the casing 11 in a manner exposed to the outside of the battery module 10. The positive electrode terminal 13A protrudes from the first end 11EA or the second end 11EB of the casing 11 in the Y direction. For example, in the battery modules 10 that are located at the even-numbered side from the -X direction (battery modules 10B, 10D, 10F), the positive electrode terminal 13A protrudes from the first end 11EA of the casing 11 in the -Y direction (refer to Figure 4 On the other hand, in the odd-numbered battery modules 10 (battery modules 10A, 10C, and 10E) counted from the −X direction, the positive electrode terminal 13A protrudes from the second end 11EB of the housing 11 in the +Y direction (see Figure 4 ).

[0046] like Figure 3As shown, the positive electrode terminal 13A is in a plate shape 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 (i.e., the amount of protrusion in the Y direction relative to the end 11E of the housing 11). For example, the width 13W1 of the positive electrode terminal 13A in the Z direction is more than twice the width 13W2 of the positive electrode terminal 13A in the Y direction.

[0047] <2.4 Negative electrode terminal>

[0048] The negative electrode terminal 13B is a terminal (total negative terminal) on the negative side of the multiple battery cells 12 included in the battery module 10 that are electrically connected in series. The negative electrode terminal 13B is an example of a "second electrode terminal". The negative electrode terminal 13B protrudes to the outside of the outer casing 11 in a manner exposed to the outside of the battery module 10. The negative electrode terminal 13B protrudes from the first end 11EA or the second end 11EB of the outer casing 11 in the Y direction. For example, in the present embodiment, in the battery modules 10 (battery modules 10B, 10D, 10F) that are located at the even-numbered side from the -X direction, the negative electrode terminal 13B protrudes from the second end 11EB of the outer casing 11 in the +Y direction (refer to Figure 4 On the other hand, in the odd-numbered battery modules 10 (battery modules 10A, 10C, and 10E) counted from the −X direction, the negative electrode terminal 13B protrudes from the first end 11EA of the housing 11 in the −Y direction (see Figure 4 ).

[0049] like Figure 3 As shown, the negative electrode terminal 13B is in the shape of a plate along the Y direction and the Z direction. In the present embodiment, the width 13W3 of the negative electrode terminal 13B in the Z direction is larger than the width 13W4 of the negative electrode terminal 13B in the Y direction (i.e., the amount of protrusion in the Y direction relative to the end 11E of the housing 11). For example, the width 13W3 of the negative electrode terminal 13B in the Z direction is more than twice the width 13W4 of the negative electrode terminal 13B in the Y direction. In addition, 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".

[0050] <2.5 Voltage detection terminal>

[0051] The voltage detection terminal 14 is a terminal for detecting a voltage associated with the battery module 10 (for example, a 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 collector (bipolar electrode) shared by two battery cells 12 adjacent 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 of (for example, 10) voltage detection terminals 14. The plurality of voltage detection terminals 14 are connected to different positions inside the battery module 10 to detect the voltage between a different group of adjacent battery cells 12. The voltage detection terminal 14 is an example of a "detection terminal". In addition, the "detection terminal" referred to in the present disclosure may also be a terminal for detecting a physical quantity other than voltage (for example, current or temperature).

[0052] The plurality of voltage detection terminals 14 protrude to the outside of the housing 11 in a manner exposed to the outside of the battery module 10. In the present embodiment, the plurality of voltage detection terminals 14 include a plurality of (e.g., 5) voltage detection terminals 14A of the first group and a plurality of (e.g., 5) voltage detection terminals 14B of the second group. The plurality of voltage detection terminals 14A of the first group protrude from the first end 11EA of the housing 11 in the -Y direction. The plurality of voltage detection terminals 14A of the first group are arranged side by side in the Z direction in a state of being separated from each other in the Z direction. The plurality of voltage detection terminals 14A of the first group include more than three detection terminals arranged in parallel with each other. The plurality of voltage detection terminals 14A of the first group are plate-shaped along the Y direction and the Z direction, respectively. In the present embodiment, the width 14W2 of the voltage detection terminal 14A in the Y direction (i.e., the protrusion amount in the Y direction relative to the end 11E of the housing 11) is larger than the width 14W1 of the voltage detection terminal 14A in the Z direction.

[0053] On the other hand, the plurality of voltage detection terminals 14B of the second group protrude from the second end 11EB of the housing 11 in the +Y direction. The plurality of voltage detection terminals 14B of the second group are arranged side by side in the Z direction in a state of being separated from each other in the Z direction. The plurality of voltage detection terminals 14B of the second group include more than three detection terminals arranged parallel to each other. The plurality of voltage detection terminals 14B of the second group are plate-shaped along the Y direction and the Z direction, respectively. In the present embodiment, the width 14W4 of the voltage detection terminal 14B in the Y direction (i.e., the protrusion in the Y direction relative to the end 11E of the housing 11) is larger than the width 14W3 of the voltage detection terminal 14B in the Z direction.

[0054] <3. Wiring module>

[0055] Next, the wiring module 20 will be described.

[0056] The wiring module 20 is, for example, a relay component for transmitting a signal obtained from a detection terminal of the battery module 10 to the outside. In the present embodiment, the wiring module 20 is a relay component for electrically connecting the detection terminal of the battery module 10 to the wiring module 80 described later. In addition, in another viewpoint, the wiring module 20 is a component 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".

[0057] Figure 4 yes Figure 2 2 is a cross-sectional view of the battery pack 1 along the F4-F4 line shown in FIG. In the present embodiment, the battery pack 1 includes, as the wiring module 20, five types of wiring modules 20A, 20B, 20C, 20D, and 20E, for example. The wiring module 20A and the wiring module 20C are arranged corresponding to the battery modules 10 located at the even number from the -X direction side (for example, the battery modules 10B, 10D, and 10F). 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 located at the odd number from the -X direction side (for example, the battery modules 10C and 10E). 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, for example, corresponding to the battery module 10 on the most -X direction side (for example, the battery module 10A).

[0058] Here, first, taking one wiring module 20A as an example, the same configurations in the wiring modules 20A, 20B, 20C, 20D, and 20E are described. In addition, regarding the same configurations, the details of the wiring module 20B can be replaced by "-X direction" and "+X direction" in the description of the wiring module 20A shown below. Similarly, the details of the wiring module 20C can be replaced by "-Y direction" and "+Y direction", "first end 11EA" and "second end 11EB", and "-X direction" and "+X direction". In the description of the wiring module 20A shown below, similarly, the details of the wiring module 20D can be replaced by "-Y direction" and "+Y direction", and "first end 11EA" and "second end 11EB" in the description of the wiring module 20A shown below. The wiring module 20E will be described later.

[0059] Figure 5 It is a side view showing one wiring module 20 (for example, wiring module 20A). Figure 62 is a perspective view showing one wiring module 20 (for example, wiring module 20A). The wiring module 20 includes, for example, a base 30, an electrode connection member 40, a wiring member 50, a thermistor 61, a connector 62, and a plurality of fuse members 63 (see Figure 5 ), and cover 64 (refer to Figure 2 ).

[0060] <3.1 Matrix>

[0061] The base 30 is a member serving as the base of the wiring module 20. The base 30 is formed of an insulating material such as a synthetic resin and has insulating properties. The base 30 is arranged to face the end 11E of the battery module 10. For example, the base 30 faces the first end 11EA of the battery module 10 from the -Y direction.

[0062] The base 30 is mounted on the end 11E of the battery module 10 using the fixing portion 30f, for example. The fixing portion 30f is a fastening member such as a bolt, but may also be a snap-fit ​​structure, etc., and is not limited to a specific structure. When the base 30 is mounted on the end 11E of the battery module 10, the wiring module 20 and the battery module 10 are integrated. In this embodiment, before the plurality of battery modules 10 are arranged side by side, the wiring module 20 is mounted on each battery module 10 to form a battery module assembly AS (see Figure 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.

[0063] like Figure 5 and Figure 6 As shown, the base 30 includes, for example, a first portion 31 , a second portion 32 , a protruding wall 33 , and a plurality of partition walls 34 .

[0064] The first portion 31 is a thin plate portion extending in the Z direction along the end portion 11E of the battery module 10. The first portion 31 extends over most of the battery module 10 in the Z direction. The Y-direction thickness W31 of the first portion 31 is greater than the Y-direction width (e.g., width 13W2, see FIG. 13 ) of the electrode terminal 13 described above. Figure 3 ) is smaller than the width in the Y direction of the voltage detection terminal 14 (eg, width 14W2, see Figure 3 When the wiring module 20 is mounted on the battery module 10 and viewed from the −X direction side, the tip end portions of the electrode terminals 13 and the plurality of voltage detection terminals 14 are exposed to the −X direction side without overlapping with the first portion 31 .

[0065] The second portion 32 is a thick plate portion extending in the Z direction along the end portion 11E of the battery module 10. The second portion 32 is located away from the first portion 31 in the +X direction. The second portion 32 extends in the Z direction in parallel with the first portion 31. The thickness of the second portion 32 in the Y direction is greater than the width of the electrode terminal 13 in the Y direction (e.g., width 13W2, see Figure 3 ) is larger and is larger than the width in the Y direction of the voltage detection terminal 14 (eg, W14W2, see Figure 3 ) is larger.

[0066] The second portion 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 on which a main body 51 of a wiring member 50 described later is mounted. The second surface 32b is a plane along the Y direction and the Z direction. For example, the second surface 32b extends from one end of the first surface 32a on the -X direction side in the +Y direction. The second surface 32b is a surface portion facing the second space portion S2 described later.

[0067] In this embodiment, a first space portion S1 and a second space portion S2 are provided between the first portion 31 and the second portion 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 mounted on the battery module 10, the electrode terminal 13 of the battery module 10 is inserted through the first space portion S1 (see Figure 8 ).

[0068] The second space S2 is provided at a position corresponding to the plurality of voltage detection terminals 14 of the battery module 10. When the wiring module 20 is mounted on the battery module 10, the plurality of voltage detection terminals 14 of the battery module 10 are inserted through the second space S2 (see Figure 8 ) The second surface 32b of the second portion 32 faces the second space portion S2 from the +X direction side.

[0069] The protruding wall 33 is a portion protruding in the -Y direction compared to the second portion 32 of the base 30. The protruding wall 33 is arranged adjacent to the second portion 32 of the base 30 from the +X direction side. The protruding wall 33 extends linearly in the -Z direction in parallel with the second portion 32. The protruding wall 33 is an insulating wall that covers the wiring member 50 and the connector 62 described later from the +X direction side.

[0070] A plurality of partition walls 34 are arranged between the first portion 31 and the second portion 32 of the base 30. The plurality of partition walls 34 are arranged side by side in the Z direction in a state separated from each other in the Z direction. Each partition wall 34 is along the X direction and the Y direction. Each partition wall 34 is connected to the first portion 31 and the second portion 32 of the base 30, respectively. The plurality of partition walls 34 are insulating walls provided in the second space portion S2.

[0071] The plurality of partition walls 34 divide the second space portion S2 into a plurality of regions R. The plurality of regions R are arranged side by side in the Z direction in a state of being electrically insulated from each other. The plurality of regions R are provided at positions corresponding to the plurality of voltage detection terminals 14 of the battery module 10 one by one. When the wiring module 20 is mounted on the battery module 10, the voltage detection terminal 14 of the battery module 10 is inserted through each region R (see Figure 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 portion S2 from each other.

[0072] <3.2 Electrode connecting member>

[0073] The electrode connecting 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 connecting member 40 is attached to the second portion 32 of the base 30 by, for example, a fixing portion not shown. The electrode connecting member 40 is supported by the second portion 32 of the base 30. The electrode connecting member 40 has a base end portion 41 connected to the electrode terminal 13 of the battery module 10 and a front end portion 42 connected to the electrode connecting member 40 provided on another wiring module 20.

[0074] The base end portion 41 of the electrode connection member 40 is disposed, 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 is opposite to 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, for example, by metal joining. The metal joining is achieved, for example, by laser welding from the -X direction side while the base end portion 41 of the electrode connecting member 40 overlaps with the electrode terminal 13 when viewed from the -X direction. However, the method of joining the base end portion 41 of the electrode connecting member 40 to the electrode terminal 13 is not limited to the above example.

[0075] The front end portion 42 of the electrode connection member 40 extends from the base end portion 41 in the X direction. The front end portion 42 of the electrode connection member 40 will be described in detail later.

[0076] 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 so-called "detection terminal" is not limited to a terminal dedicated to detection, but broadly means a terminal that can be used for detection.

[0077] <3.3 Wiring components>

[0078] Figure 7: is a stereoscopic diagram showing a wiring member 50, a thermistor 61 and a connector 62. The wiring member 50 is a member having a wiring 53, and the wiring 53 is used to transmit the signal obtained from the 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 so-called "flat wiring material" broadly means a member including an insulating substrate having flexibility and a wiring (conductive pattern) provided on the insulating substrate. The flat wiring material is a flexible flat cable (FFC: Flexible Flat Cable), or a flexible printed circuit (FPC: Flexible Printed Circuits), etc.

[0079] In the present embodiment, the wiring member 50 includes a main body 51 and a plurality of connection parts 52. In addition, the wiring member 50 includes a plurality of wirings 53. The wirings 53 extend over the main body 51 and the connection parts 52.

[0080] The main body 51 is in the form of a thin film extending in the X direction and the Z direction. The main body 51 is arranged to face the base 30 from the Y direction. The main body 51 is attached to the first surface 32a (see FIG. 1 ) of the second portion 32 of the base 30 by a fixing portion (e.g., adhesive material) not shown in the figure. Figure 6 ). The main body 51 is supported by the first surface 32 a of the second portion 32 of the base 30 .

[0081] The plurality of connection portions 52 include, for example, a plurality of (eg, five) terminal connection portions 52A for voltage detection terminals, a terminal connection portion 52B for electrode terminals, and a thermistor connection portion 52C.

[0082] (Terminal connection portion for voltage detection terminal)

[0083] The plurality of terminal connection parts 52A branch off from the main body 51 and extend. The plurality of terminal connection parts 52A are thin films along the Y direction and the Z direction, respectively. The plurality of terminal connection parts 52A are formed, for example, by bending a portion of the wiring member 50 from the main body 51. The plurality of terminal connection parts 52A are arranged along the second surface 32b of the second portion 32 of the substrate 30. Alternatively, the plurality of terminal connection parts 52A may be mounted on the second surface 32b of the second portion 32 of the substrate 30 by a fixing part (e.g., an adhesive material) not shown in the figure.

[0084] The plurality of terminal connection parts 52A are separated from each other in the Z direction. The plurality of terminal connection parts 52A include, for example, three or more terminal connection parts 52A arranged parallel to each other. The plurality of terminal connection parts 52A are divided and extend inside the plurality of regions R defined by the plurality of partition walls 34. That is, the plurality of terminal connection parts 52A are respectively inserted into different regions R. The partition wall 34 is located between the plurality of terminal connection parts 52A.

[0085] Figure 8 1 is a perspective view for explaining the connection structure of the terminal connection part 52A. The plurality of terminal connection parts 52A are connected to the plurality of voltage detection terminals 14 of the battery module 10, respectively. For example, the plurality of terminal connection parts 52A are respectively located inside the region R into which the terminal connection parts 52A are inserted, and face the voltage detection terminals 14 inserted into the same region R from the +X direction. In the present embodiment, the plurality of terminal connection parts 52A face the plurality of voltage detection terminals 14 in a state of being bent from the main body 51.

[0086] The terminal connection portion 52A is joined to the voltage detection terminal 14 by metal joining, for example. The metal joining is achieved, for example, by laser welding from the -X direction side while the terminal connection portion 52A overlaps the voltage detection terminal 14 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.

[0087] (Terminal connection portion for electrode terminal)

[0088] The terminal connection portion 52B is a terminal connection portion for detecting the voltage of the electrode terminal 13 (the voltage of the electric power output from the battery module 10). The terminal connection portion 52B maintains the same posture as the main body 51 and extends from the main body 51 in the -Z direction. The terminal connection portion 52B is in the form of a thin film along the X direction and the Z direction. The terminal connection portion 52B overlaps with the electrode connection member 40 when viewed from the Y direction. The terminal connection portion 52B is joined to the electrode connection member 40 in the same manner as the terminal connection portion 52A, for example, by metal joining. However, the joining method of the terminal connection portion 52B and the electrode connection member 40 is not limited to the above example.

[0089] (Thermistor connection)

[0090] The thermistor connection portion 52C branches off and extends from the main body 51 together with the plurality of terminal connection portions 52A. The thermistor connection portion 52C is in the form of a thin film along the Y direction and the Z direction. The thermistor connection portion 52C is formed, for example, by the following manner: a portion of the wiring member 50 is bent from the main body 51. The thermistor connection portion 52C is arranged along the second surface 32b of the second portion 32 of the substrate 30. Alternatively, the thermistor connection portion 52C may be mounted on the second surface 32b of the second portion 32 of the substrate 30 by a fixing portion (e.g., an adhesive material) not shown in the figure. The thermistor connection portion 52C is arranged at a position different from the plurality of terminal connection portions 52A in the Z direction. The thermistor connection portion 52C is connected to the thermistor 61 described later.

[0091] <3.4 Thermistor>

[0092] The thermistor 61 is a component that detects the temperature associated with the battery module 10. The thermistor 61 is provided inside the wiring module 20. In the present embodiment, the thermistor 61 is connected to one voltage detection terminal 14. For example, the thermistor 61 is opposite to the voltage detection terminal 14 from the -X direction side. The thermistor 61 is opposite to the voltage detection terminal 14 from the opposite side of the terminal connection portion 52A. The thermistor 61 is joined to the voltage detection terminal 14 together with the terminal connection portion 52A, for example, by metal joining. However, the joining method of the thermistor 61 and the voltage detection terminal 14 is not limited to the above example.

[0093] <3.5 Connectors>

[0094] The connector 62 is a connection portion that electrically connects the wiring module 20 and the wiring module 80 in a detachable manner. The connector 62 is provided, for example, at the end portion in the +Z direction of the wiring module 20. The connector 62 is supported by the base 30. For example, the connector 62 is placed on the main body 51 of the wiring member 50 and is supported by the base 30 via the wiring member 50. The connector 62 is connected to the main body 51 of the wiring member 50.

[0095] The connector 62 includes a connector body 62a and a plurality of terminals 62b. The connector body 62a includes an opening 62h that opens in the +Z direction and a plurality of terminals (not shown) that are disposed inside the opening 62h. The plurality of terminals 62b are disposed 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 the present embodiment, the plurality of terminals 62b correspond to the plurality of wirings 53 of the wiring member 50 one by one.

[0096] <3.6 Fuse components>

[0097] The fuse component 63 is provided in the main body portion 51 of the wiring member 50 (see Figure 5 ). The fuse component 63 is, for example, a surface-mounted chip fuse. The fuse component 63 is disposed in the middle of each wiring 53 in the main body 51 of the wiring component 50. For example, each wiring 53 includes: a first part 53a, which is connected to the connector 62; and a second part 53b, which is disposed in the connecting portion 52. The first part 53a and the second part 53b are disposed separately. The fuse component 63 is electrically connected in series between the first part 53a and the second part 53b. When an excessive current flows through the wiring 53 in which the fuse component 63 is disposed, the fuse component 63 is melted and the first part 53a and the second part 53b are cut off. For example, the fuse component 63 is disposed in the main body 51 of the wiring component 50.

[0098] Fig. 9: is a circuit diagram showing the structure of the wiring module 20 of the embodiment. In the present embodiment, the plurality of fuse components 63 include a plurality of (for example, 5) fuse components 63A and a fuse component 63B. The plurality of fuse components 63A are arranged electrically in parallel with each other. The plurality of fuse components 63A are respectively 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 connecting member 40 and the connector 62. The fuse component 63 is a component used in association with the battery module 10. The fuse component 63 is an example of an "electronic component".

[0099] <3.7 hood>

[0100] Back to Figure 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 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.

[0101] <4. Structure of electrode connecting member>

[0102] Next, the connection structure between the plurality of wiring modules 20 will be described.

[0103] Fig.10 2 is a side view showing one wiring module 20A and another wiring module 20B. Hereinafter, for convenience of description, the wiring module 20A is referred to as a "first wiring module 20A". In addition, the wiring module 20B is referred to as a "second wiring module 20B".

[0104] The first wiring module 20A is an example of a “first connection module.” The electrode terminal 13 (eg, 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 mounted is an example of a “first battery module.”

[0105] The second wiring module 20B is an example of a "second connection module". The electrode terminal 13 (e.g., the negative electrode terminal 13B) of the second wiring module 20B is an example of a "second electrode terminal". The battery module 10 to which the second wiring module 20B is mounted is an example of a "second battery module". In the present embodiment, an example of a connection module group MS is formed by the first wiring module 20A and the second wiring module 20B.

[0106] (1st wiring module)

[0107] First, the first wiring module 20A is described. The first wiring module 20A has a first base 30A as a base 30. In addition, the first wiring module 20A has a first electrode connecting member 40A as an electrode connecting member 40. The first electrode connecting member 40A is, for example, a convex engaging member. The first electrode connecting member 40A is made of metal. The first electrode connecting member 40A has: a base end portion 41A, which is connected to the electrode terminal 13 of the first battery module 10; and a front end portion 42A, which is physically and electrically connected to the electrode connecting member 40 of the second wiring module 20B.

[0108] 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 is opposite to the electrode terminal 13 (for example, the positive electrode terminal 13A) of the first battery module 10 from the +X direction side. The front end portion 42A protrudes from the end of the base end portion 41A on the -Y direction side to the +X direction. The front end portion 42A includes a plate portion 42p along the X direction and the Z direction. The front end portion 42A, for example, protrudes to the +X direction side beyond the end surface of the housing 11 of the first wiring module 20A on the +X direction side. The front end portion 42A is an example of a "protruding end".

[0109] In the present embodiment, the width 40W1 of the first electrode connecting member 40A in the Z direction is larger than the width 40W2 of the first electrode connecting member 40A in the X direction, and larger than the width 40W3 of the first electrode connecting member 40A in the Y direction. In addition, the width 40W1 of the first electrode connecting member 40A in the Z direction is larger than the protrusion 40W4 of the end surface of the first electrode connecting member 40A on the +X direction side relative to the first substrate 30A. For example, the width 40W1 of the first electrode connecting member 40A in the Z direction is more than twice the protrusion 40W4 of the first electrode connecting member 40A. For example, the width 40W1 of the first electrode connecting member 40A in the Z direction is the same as the width 13W1 (or width 13W3) of the electrode terminal 13 of the above-mentioned battery module 10 in the Z direction.

[0110] In the present embodiment, the first base body 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.

[0111] (2nd wiring module)

[0112] Next, the second wiring module 20B will be described. The second wiring module 20B has a second base 30B as a base 30. In addition, the second wiring module 20B has a second electrode connecting member 40B as an electrode connecting member 40. The second electrode connecting member 40B is, for example, a concave engaging member. The second electrode connecting member 40B is made of metal. The second electrode connecting member 40B has: a base end portion 41B, which is connected to the electrode terminal 13 of the second battery module 10; and a front end portion 42B, which is physically and electrically connected to the electrode connecting member 40 (first electrode connecting member 40A) of the first battery module 10.

[0113] The base end portion 41B includes a plate portion along the Y direction and the Z direction. The base end portion 41B is opposite to the electrode terminal 13 (for example, the negative electrode terminal 13B) of the second battery module 10 from the -X direction side. The front end portion 42B extends from the base end portion 41B in the -X direction. The front end portion 42B includes a space where the front end portion 42A (protruding end portion) of the first wiring module 20A is inserted along the X direction. The front end portion 42B holds the front end portion 42A (protruding end portion) of the inserted first wiring module 20A. The front end portion 42B is an example of a "holding portion".

[0114] Hereinafter, an example of the second electrode connecting member 40B will be described.

[0115] In the present embodiment, the front 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 includes, for example, a first portion 44a, a second portion 44b, and a third portion 44c.

[0116] 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 (e.g., 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.

[0117] 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 end portion of the first portion 44a on the -Y direction side. In the present embodiment, the second portion 44b extends in the +X direction 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 end portion of the second portion 44b on the +X direction side. The third portion 44c is located on the +X direction side compared to the electrode terminal 13 of the second battery module 10.

[0118] In the present embodiment, the front end 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 a pair of clamping portions 45a and 45b, a base portion 45c, and an insertion space 46, for example.

[0119] The base 45c is located at the end of the leaf spring member 45 on the +X direction side. The base 45c extends along the Y direction and the Z direction. The clamping parts 45a and 45b extend from both ends of the base 45c in the Y direction in the -X direction. The clamping parts 45a and 45b are arranged separately in the Y direction. The ends of the clamping parts 45a and 45b on the +X direction side are supported by the base 45c. The clamping parts 45a and 45b can be elastically deformed in the Y direction. For example, the clamping parts 45a and 45b can be elastically deformed relative to the base 45c. The insertion space 46 exists between the clamping parts 45a and 45b.

[0120] In the present embodiment, when the first wiring module 20A and the second wiring module 20B are connected, the front end portion 42A (protruding end portion) of the first wiring module 20A is inserted between the clamping portions 45a and 45b of the second wiring module 20B. The front end portion 42A of the first wiring module 20A is pressed into the inner side of the insertion space 46 while elastically deforming the clamping portions 45a and 45b so as to expand the gap (insertion space 46) between the clamping portions 45a and 45b in the Y direction.

[0121] In this case, the front end portion 42A of the first electrode connecting member 40A is pressed from both sides of the Y direction by the clamping portions 45a and 45b. As a result, the first electrode connecting member 40A and the second electrode connecting 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 the present embodiment, the plate portion 42p of the front end portion 42A of the first wiring module 20A is clamped from both sides of the Y direction by the clamping portions 45a and 45b. In the present embodiment, an example of the electrode connecting member group TS is formed by the first electrode connecting member 40A and the second electrode connecting member 40B.

[0122] In the present 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 the present embodiment, the base 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 longer in the -X direction from the base 45c beyond the electrode terminal 13 of the second battery module 10. Such longer extending clamping portions 45a and 45b are more likely to be elastically deformed in the Y direction than shorter extending clamping portions.

[0123] In the present embodiment, the width 40W5 of the second electrode connecting member 40B in the Z direction is greater than the width 40W6 of the second electrode connecting member 40B in the X direction. For example, the width 40W5 of the second electrode connecting member 40B in the Z direction is the same as the width 13W1 (or width 13W3) of the electrode terminal 13 of the battery module 10 in the Z direction.

[0124] In the present embodiment, the second base 30B of the second wiring module 20B has a second engagement portion 70B. The second engagement portion 70B includes, for example, an engagement hole 72 recessed in the +X direction. The engagement hole 72 allows the protrusion 71 of the first wiring module 20A to be inserted and engaged (for example, fitted).

[0125] In addition, the configuration of the positive electrode terminal 13A and the negative electrode terminal 13B may be opposite to the above example. That is, the base end 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 41B of the second wiring module 20B may be connected to the positive electrode terminal 13A of the second battery module 10. In addition, the configuration of the first electrode connecting member 40A and the second electrode connecting member 40B may be opposite to the above example. That is, the first wiring module 20A may have the second electrode connecting member 40B, and the second wiring module 20B may have the first electrode connecting member 40A. In addition, the configuration of the protrusion 71 and the engaging hole 72 may be opposite to 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 protrusion 71.

[0126] In the present embodiment, the first wiring module 20A and the second wiring module 20B are combined with each other after the first wiring module 20A is mounted on the first battery module 10 and the second wiring module 20B is mounted on the second battery module 10 .

[0127] Next, refer to Figure 4 , the configuration related to the electrode connection member 40 of the wiring modules 20C and 20D is described. Regarding the configuration related to the electrode connection member 40 of the wiring module 20C, in the description related to the second electrode connection member 40B of the wiring module 20B described above, the "-Y direction" and the "+Y direction" can be replaced. Regarding the configuration related to the electrode connection member 40 of the wiring module 20D, in the description related to the first electrode connection member 40A of the wiring module 20A described above, the "-Y direction" and the "+Y direction" can be replaced. In the present embodiment, an example of another connection module group MS is formed by the wiring module 20C and the wiring module 20D.

[0128] Next, refer to Figure 2The wiring module 20E is described. The wiring module 20E is located on the -X direction side of 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 a vehicle body on which the battery pack 1 is mounted).

[0129] <5. Module layout>

[0130] Next, the layout module 80 will be described.

[0131] Fig.11 2 is a perspective view showing a 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 joint connector 84.

[0132] <5.1 Matrix>

[0133] The base 81 is a member serving as a base of the wiring module 80. The base 81 is formed of an insulating material such as synthetic resin and has insulating properties. The base 81 extends in the X direction. The base 81 faces the plurality of wiring modules 20 from the +Z direction side.

[0134] <5.2 Single connector>

[0135] The individual connector 82 is a connection portion for being connected to each wiring module 20. A plurality of individual connectors 82 are mounted on 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.

[0136] <5.3 Wiring components>

[0137] The wiring member 83 has wiring 83a (see Fig. 9 ) component, and the wiring 83a is used to transmit the signal obtained through the individual connector 82 to the joint connector 84. The wiring component 83 is, for example, a flat wiring material. The wiring component 83 is a flexible flat cable (FFC) or a flexible printed circuit (FPC). The wiring component 83 is a thin film along the X direction and the Y direction. The wiring 83a of the wiring component 83 is electrically connected to the plurality of wirings 53 via the plurality of individual connectors 82, and the plurality of wirings 53 are respectively provided in the plurality of wiring modules 20.

[0138] <5.4 Joint Connector>

[0139] The joint connector 84 is a connector that is detachably connected to a signal processing unit (for example, a monitoring unit that monitors the state of the battery pack 1), and the signal processing unit performs signal processing related to 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 joint connector 84 is, for example, arranged at the end of the wiring module 80 on the +X direction side. The joint connector 84 transmits information obtained from the plurality of wiring modules 20 via the plurality of individual connectors 82 to the signal processing unit.

[0140] <6. Other components>

[0141] Next, return to Figure 1 , the insulating member 91, the end plate 92 and the connecting member 93 are described.

[0142] <6.1 Insulation components>

[0143] The plurality of insulating members 91 include a first insulating member 91A and a second insulating member 91B. The first insulating member 91A and the second insulating member 91B are plate-shaped along the Y direction and the Z direction, respectively. The first insulating member 91A and the second insulating member 91B are elastic. For example, the first insulating member 91A and the second insulating member 91B are formed of an insulating material such as rubber and are elastic. The first insulating member 91A is arranged on the -X direction side relative to the plurality of battery modules 10. The second insulating member 91B is arranged on the +X direction side relative to the plurality of battery modules 10.

[0144] <6.2 End Plate>

[0145] The plurality of end plates 92 include a first end plate 92A and a second end plate 92B. The first end plate 92A and the second end plate 92B are plates along the Y direction and the Z direction, respectively. The first end plate 92A and the second end plate 92B are made of metal, for example, and have rigidity. The first end plate 92A is arranged on the -X direction side relative to the first insulating member 91A. The second end plate 92B is arranged on the +X direction side relative to the second insulating member 91B.

[0146] <6.3 Connecting parts>

[0147] 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. In addition, 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. Thus, the plurality of battery modules 10 are constrained.

[0148] <7. Assembly method>

[0149] Next, a method for assembling the battery pack 1 will be described.

[0150] First, the wiring modules 20 are mounted on the first end 11EA and the second end 11EB of each battery module 10. This results in a battery module assembly AS including one battery module 10 and two wiring modules 20 divided on both sides of the battery module 10 in the Y direction.

[0151] Next, a plurality of battery module assemblies AS are arranged side by side in the X direction. For example, the front end portion 42A (protruding end portion) of the first electrode connecting member 40A of one battery module assembly AS (first battery module assembly) is inserted into the front end portion 42B (holding portion) of the second electrode connecting 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 engaging hole 72 of the second battery module assembly AS.

[0152] Next, the plurality of battery module assemblies AS are restrained in a stacked state by installing a plurality of insulating members 91, a plurality of end plates 92, and a plurality of connecting members 93. Next, two layout modules 80 are installed for the plurality of battery module assemblies AS. Thus, the battery pack 1 is completed.

[0153] <8. Modifications>

[0154] Next, several modified examples will be described. In each modified example, the configuration other than that described below is the same as that of the above-described embodiment.

[0155] <8.1 First Modification: Cell Balance Circuit>

[0156] Fig.12 1 is a circuit diagram showing the structure of the wiring module 20 of the first variant. In this variant, the wiring module 20 has a cell balancing circuit 110. The cell balancing circuit 110 is a circuit that corrects the imbalance of the stored electricity of the plurality of battery cells 12. The cell balancing circuit 110, for example, has a plurality of discharge units 111. The discharge unit 111 is electrically connected between two adjacent voltage detection terminals 14. The discharge unit 111, for example, includes a resistor 111a and a transistor 111b. The transistor 111b is electrically connected in series with the resistor 111a. The transistor 111b switches 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 to equalize the voltage or remaining capacity of the plurality of battery cells 12.

[0157] The resistor 111a and the transistor 111b are components used in association with the battery module 10. The discharge unit 111 (resistor 111a and transistor 111b) is provided, for example, in the main body 51 of the wiring member 50. The resistor 111a and the transistor 111b are each an example of an "electronic component". In addition, when the discharge unit 111 is formed by one chip component (integrated circuit component), the chip component is an example of an "electronic component".

[0158] <8.2 Second Modification: Signal Processing Unit>

[0159] Fig.13 This is a circuit diagram showing the structure of the wiring module 20 of the second variant. In this variant, the wiring module 20 has a signal processing unit 120. The signal processing unit 120 is a functional unit that performs processing associated with the signal of the wiring 53 flowing through 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, for example, includes one or more chip components (integrated circuit components) 121 that perform signal processing. The signal processing unit 120 (chip component 121) is, for example, disposed in 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".

[0160] In this modification, the signal processing unit 120 performs processing associated with the signal flowing from each voltage detection terminal 14 through 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.

[0161] In addition, the signal processing unit 120 performs processing related to the signal flowing from the thermistor 61 through the wiring 53. For example, the signal processing unit 120 detects the temperature value of the battery cell 12 based on the voltage difference between both ends of the thermistor 61. The signal processing unit 120 generates a signal indicating the detected temperature value of the battery cell 12.

[0162] 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 the signal processing unit. The communication circuit unit 130 converts the 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 such as a packet suitable for data communication. The communication circuit unit 130 sends the converted signal to the signal processing unit through the connector 62 and the layout module 80 via data communication.

[0163] 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, in the main body 51 of the wiring member 50. The chip component 131 is a component used in association with the battery module 10. The chip component 131 is an example of an "electronic component".

[0164] In this modification, 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 less 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 (a 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 (a plurality of battery cells 12) to the signal processing unit via wirings 54 which are less in number than the number of the plurality of voltage detection terminals 14.

[0165] In addition, the signal processing performed by the signal processing unit 120 is not limited to the above-mentioned example. For example, instead of or in addition to the above-mentioned example, the signal processing unit 120 may generate a control signal for operating the cell balancing circuit 110 based on the magnitude of the voltage applied to the wiring 53 from each voltage detection terminal 14, and output the generated control signal to the cell balancing circuit 110. In addition, the signal processing performed by the signal processing unit 120 may be noise removal, averaging processing, or comparison with a preset threshold value of the signal obtained from the electrode terminal 13, the voltage detection terminal 14, or the thermistor 61.

[0166] <8.3 Third Modification: First Alternative Embodiment of Electrode Connecting Member>

[0167] Fig.14 1 is a side view showing the first wiring module 20A and the second wiring module 20B of the third modified example. In this modified example, the front end portion 42B of the second electrode connecting member 40B has a leaf spring member 45. The leaf spring member 45 includes a pair of clamping portions 45a, 45b, a base 45c, and an insertion space 46. The clamping portion 45a is in the shape of a plate along the X direction and the Z direction. On the other hand, the clamping portion 45b is folded back toward the inside of the insertion space 46. The clamping portion 45b can be elastically deformed in the Y direction. For example, the clamping portion 45b can be elastically deformed in the Y direction relative to the base 45c.

[0168] In this modified example, the front end portion 42A of the first wiring module 20A is pressed into the inner side of the insertion space 46 while elastically deforming the clamping portion 45b so as to expand the gap between the clamping portions 45a and 45b (insertion space 46) in the Y direction. In this case, the front end portion 42A of the first wiring module 20A is pressed by the clamping portions 45a and 45b from both sides in the Y direction. For example, the plate portion 42p of the front end portion 42A of the first wiring module 20A is clamped by the clamping portions 45a and 45b from both sides in the Y direction.

[0169] In this modification, the clamping portion 45b has, for example, one or more (for example, multiple) slits SL. The multiple slits SL are separately arranged in the Z direction. The multiple slits SL extend from one end of the clamping portion 45b in the -X direction along the +X direction. When the slits SL are provided, even when the first electrode connecting member 40A is tilted relative to the second electrode connecting member 40B, the clamping portion 45b can be elastically deformed in accordance with the tilt of the first electrode connecting member 40A. If the clamping portion 45b can be elastically deformed in accordance with the tilt of the first electrode connecting member 40A, the first electrode connecting member 40A and the second electrode connecting member 40B can be easily connected more firmly.

[0170] <8.4 Fourth Modification: Second Alternative Embodiment of Electrode Connecting Member>

[0171] Fig.15 1 is a side view showing the first wiring module 20A and the second wiring module 20B of the fourth modified example. The first wiring module 20A has a first electrode connecting member 40A′ as the electrode connecting member 40. The first electrode connecting member 40A′ is, for example, a convex engaging member. The first electrode connecting member 40A′ is, for example, a plate member along the X direction and the Z direction. The first electrode connecting member 40A′ has a front end portion 42A′ protruding in the +X direction. The front end portion 42A′ includes a plate portion 42p along the X direction and the Z direction. The front end portion 42A′ is an example of a “protruding end portion”.

[0172] 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 concave engagement member. The second electrode connection member 40B′ includes, for example, a cylindrical front end portion 42B′ having a space for inserting the front end portion 42A′ of the first electrode connection member 40A′. The front end portion 42B′ holds the front end portion 42A (protruding end portion) of the inserted first wiring module 20A. The front end portion 42B′ is an example of a “holding portion”.

[0173] In this modification, the front end portion 42B′ includes a barrel portion 140 having a groove. That is, the front end portion 42B′ has a plurality of slits SL. The plurality of slits SL extend along the +X direction from the first end 140a, which is one end of the front end portion 42B′ on the -X direction side. The front end portion 42B′ has a plurality of slits SL, which makes it easy to elastically deform toward the outer peripheral side of the barrel portion 140. For example, the front end portion 42B′ is elastically deformable at least in the Y direction. In this modification, the front end portion 42B′ is elastically deformable in the Y direction and the Z direction. The barrel portion 140 includes, for example, a pair of clamping portions 45a, 45b, a base 45c, and an insertion space 46.

[0174] In this modification, when the first wiring module 20A and the second wiring module 20B are connected, the front end portion 42A′ (protruding end portion) of the first wiring module 20A is pressed into the inner side of the insertion space 46 while elastically deforming the front end portion 42B′ (holding portion) of the second wiring module 20B so as to expand toward the outer peripheral side (for example, the gap between the clamping portions 45a and 45b is expanded in the Y direction). In this case, the front end portion 42A′ of the first wiring module 20A is pressed from the outer peripheral side by the front end portion 42B′ (for example, pressed from both sides in the Y direction by the clamping portions 45a and 45b). As a result, the first wiring module 20A and the second wiring module 20B are physically and electrically connected. The plate portion 42p of the front end portion 42A′ of the first wiring module 20A is clamped from both sides in the Y direction by the clamping portions 45a and 45b.

[0175] <9. Advantages>

[0176] <9.1 Advantages from the first point of view>

[0177] As a comparative example, the following configuration is considered: 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 a separate electrical connection component is installed for each of the plurality of detection terminals. In the configuration of this comparative example, the operation of installing a separate electrical connection component for each of the plurality of detection terminals becomes complicated, and the assembly operability of the battery pack may be reduced. This tendency may become significant when the number of battery modules included in one battery pack increases as the capacity of the battery pack increases.

[0178] On the other hand, in the present embodiment, the wiring module 20 includes an insulating base 30 and a wiring member 50. When the direction in which the plurality of battery modules 10 are arranged side by side is set as a first direction and a direction different from the first direction is set as a second direction, the base 30 is arranged to face the first end 11EA of one of the plurality of battery modules 10 in the second direction. The wiring member 50 includes: a main body 51 supported by the base 30; and a plurality of terminal connection parts 52A branching and extending from the main body 51 and connected to a plurality of detection terminals (e.g., voltage detection terminals 14) provided at the first end 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 achieved by one wiring member 50. When electrical connection to the plurality of detection terminals can be achieved by one wiring member 50, the assembly workability of the battery pack 1 can be improved compared with the case where separate electrical connection components are installed for the plurality of detection terminals.

[0179] In this 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 connected to the three or more detection terminals, respectively. 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 achieved.

[0180] In the present embodiment, the substrate 30 has a plurality of partition walls 34 for electrically insulating the plurality of detection terminals. The plurality of terminal connection portions 52A are divided into 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 into and extend inside a plurality of regions R defined by the plurality of partition walls 34. When the plurality of terminal connection portions 52A can be divided into and extend inside a plurality of regions R, the insulation between the plurality of terminal connection portions 52A can be ensured at a higher level.

[0181] In the present embodiment, a plurality of detection terminals are arranged side by side in a third direction different from the first direction and the second direction. A plurality of terminal connection portions 52A are arranged to be opposite to the plurality of detection terminals respectively 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 terminals and the terminal connection portions 52A are connected in the third direction, the gap between the plurality of detection terminals can be made smaller. When the gap between the plurality of detection terminals can be made smaller, it will be easy to seek miniaturization of the battery pack 1.

[0182] In the present embodiment, the main body 51 of the wiring member 50 is arranged to be opposite to the base 30 from the second direction. The plurality of terminal connection portions 52A are arranged to be bent from the main body 51 and respectively opposite to the plurality of detection terminals from the first direction. According to such a configuration, the main body 51 having a larger area than the terminal connection portion 52A can be arranged along the first direction. When the main body 51 can be arranged along the first direction, it is easy to achieve miniaturization of the battery pack 1.

[0183] In the present embodiment, the wiring module 20 has an electrode connecting member 40. The electrode connecting member 40 includes: a base end portion 41, which is electrically connected to the electrode terminal 13 of the battery module 10; and a front end portion 42, which is electrically connected to the electrode terminal 13 of another battery module 10. In addition, the wiring member 50 also has a terminal connecting portion 52B connected to the electrode connecting member 40. According to such a configuration, the terminal connecting portion 52B connected to the electrode connecting member 40 and the plurality of terminal connecting portions 52A connected to the plurality of detection terminals can be realized by one wiring member 50. When the terminal connecting portion 52B and the plurality of terminal connecting portions 52A can be realized by one wiring member 50, the assembly operability of the battery pack 1 can be further improved.

[0184] In the present 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 includes 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 implemented by one wiring member 50. When the thermistor connection portion 52C and the plurality of terminal connection portions 52A can be implemented by one wiring member 50, further improvement in the assembly workability of the battery pack 1 can be achieved.

[0185] In the present embodiment, the wiring module 20 further includes a connector 62, which is supported by the base 30 and detachably connected to the wiring module 80. The main body 51 is connected to the connector 62. According to such a configuration, it is possible to improve the assembly workability of the battery pack 1 inside the wiring module 20 mounted on each battery module 10.

[0186] In addition, in the first aspect, electronic components do not need to be provided on the wiring member 50. Furthermore, the electrode terminals 13 of the plurality of battery modules 10 may be connected by a connection structure based on bolt fastening.

[0187] <9.2 Advantages from the second point of view>

[0188] As a comparative example, the following configuration is considered: in a battery pack including a plurality of battery modules, the electronic components used in association with each battery module are centrally arranged in a signal processing unit (e.g., a monitoring device) of the battery pack. In the configuration of this comparative example, because the wiring between each battery module and the signal processing unit becomes complicated, and / or the electronic components are centrally arranged, the signal processing unit (e.g., a monitoring device) tends to be large-scaled, so it is sometimes difficult to miniaturize the battery pack. This tendency may become significant when the number of battery modules included in one battery pack increases as the capacity of the battery pack increases.

[0189] On the other hand, in the present embodiment, the wiring module 20 includes an insulating base 30, a wiring member 50, and electronic components. When the direction in which the plurality of battery modules 10 are arranged is set as a first direction and a direction different from the first direction is set as a second direction, the base 30 is arranged to face the first end 11EA of one of the plurality of battery modules 10 in the second direction. The wiring member 50 includes: a main body 51 supported by the base 30; and a terminal connection portion 52A (or a terminal connection portion 52B) extending from the main body 51 and connected to the detection terminal provided at the first end 11EA of the battery module 10. The electronic components are provided in the wiring member 50 and used in association with the battery module 10. According to such a configuration, by using the wiring module 20 to arrange the electronic components, the wiring between the wiring module 20 and the signal processing unit (for example, a monitoring device) can be simplified, and / or a situation in which a large number of electronic components are concentratedly arranged in the signal processing unit (for example, a monitoring device) can be suppressed. As a result, it is easy to seek miniaturization of the battery pack 1. Furthermore, the simplification of wiring refers to, for example, a reduction in the number of wirings, simplification of wiring layout, or elimination or reduction of a protective function.

[0190] 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 the terminal connection portion 52B). According to such a configuration, processing or actions related to the state of the detection terminals of the battery module 10 can be performed near the battery module 10. When such processing or actions 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 is easier to achieve miniaturization of the battery pack 1.

[0191] In the present embodiment, the wiring module 20 further includes a connector 62, which is detachably connected to the wiring module 80 of the battery pack 1. The electronic components are electrically connected between the terminals 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, thereby simplifying the wiring module 80. In addition, the simplification of the wiring module refers to, for example, the reduction of the number of wirings in the wiring module, the simplification of the wiring layout, or the elimination or reduction of the protection function.

[0192] In the present embodiment, the main body 51 of the wiring member 50 is configured to be opposite to the base 30 from the second direction. The terminal connection portion 52A is configured to be bent from the main body 51 and to be opposite to the detection terminal of the battery module 10 from the first direction. The electronic components are provided in the main body 51 of the wiring member 50. According to such a configuration, the electronic components are arranged in the second direction which is easy to create a spatial margin compared with the first direction, so that even when the electronic components are provided in the wiring module 20, it is easy to suppress the enlargement of the wiring module 20. In addition, since the electronic components are provided in the main body 51, the electronic components can be stably installed compared with the case where the electronic components are provided in the terminal connection portion 52A.

[0193] In the present 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, a protection function associated with the state of the detection terminal of the battery module 10 can be provided near the battery module 10, thereby making it easier to simplify the wiring between the wiring module 20 and the signal processing unit.

[0194] In the present embodiment, the wiring module 20 further includes a cell balancing circuit 110 provided in the wiring member 50. The electronic components are components (e.g., resistors 111a and transistors 111b) included in the cell balancing circuit 110. According to such a configuration, the cell balancing circuit 110 corresponding to each battery module 10 can be provided near the battery module 10, so that the wiring between the wiring module 20 and the signal processing unit can be simplified.

[0195] In the present embodiment, the wiring module 20 further includes an information processing unit 120, which is provided in the wiring member 50 and performs processing associated with the signal obtained from the detection terminal of the battery module 10. The above-mentioned electronic components are components included in the information processing unit 120. According to such a configuration, the signal processing corresponding to each battery module 10 can be implemented near the battery module 10, so it is easier to simplify the wiring between the wiring module 20 and the signal processing unit.

[0196] In the present 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 above-mentioned electronic components are components included in the communication circuit unit 130. According to such a configuration, 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.

[0197] In addition, in the second aspect, the wiring member 50 may not have a plurality of terminal connection portions 52A branched from each other. In addition, the electrode terminals 13 of a plurality of battery modules 10 may be connected by a connection structure fastened by bolts.

[0198] <9.3 Advantages from the third point of view>

[0199] As a comparative example, the following configuration is considered: in a battery pack in which a plurality of battery modules are arranged along a first direction, when the electrodes of the plurality of battery modules are connected to each other, the connection structure is realized by bolting 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 bolting becomes complicated, and the assembly workability of the battery pack may be reduced. This tendency may become significant when the number of battery modules included in one battery pack increases with the increase in the capacity of the battery pack.

[0200] On the other hand, in the present embodiment, the connection module group MS is a member group used for the battery pack 1, and the battery pack 1 includes: a first battery module 10; and a second battery module 10, which is adjacent to the first battery module 10 in the first direction. The connection module group 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 connecting member 40A, which is supported by the first base 30A. The first base 30A is arranged opposite to the first end 11EA of the first battery module 10. The first electrode connecting member 40A includes: a base end 41A, which is electrically connected to the first electrode terminal 13 of the first battery module 10; and a front end 42A (protruding end) which protrudes in the above-mentioned first direction. The second wiring module 20B includes: an insulating second base 30B; and a second electrode connecting member 40B, which is supported by the second base 30B. The second base body 30B is arranged opposite to the first end 11EA of the second battery module 10. The second electrode connecting member 40B includes: a base end 41B, which is electrically connected to the second electrode terminal 13 of the second battery module 10; and a front end 42B (holding portion) that inserts and holds the front end 42A (protruding end portion) of the first electrode connecting member 40A. According to such a configuration, as the two battery modules 10 are arranged side by side in the first direction, the first electrode connecting member 40A is held by the second electrode connecting member 40B. When such a holding structure is provided, the assembly operability of the battery pack 1 can be improved compared to a case where such a holding structure is not provided.

[0201] In the present embodiment, the front end portion 42B (holding portion) of the second electrode connecting member 40B has a portion that can be elastically deformed in a direction intersecting the above-mentioned first direction, and holds the front end portion 42A (protruding end) of the first electrode connecting member 40A. According to such a configuration, at least a portion of the front end portion 42B (holding portion) of the second electrode connecting member 40B is elastically deformed, thereby the front end portion 42A of the first electrode connecting member 40A is more firmly held. When the front end portion 42A of the first electrode connecting member 40A is more firmly held, it is easy to further seek to improve the assembly operability of the battery pack 1. In addition, in the present disclosure, the so-called "direction intersecting the first direction (e.g., X direction)" is not limited to the second direction (e.g., Y direction), and can also be a third direction (e.g., Z direction).

[0202] In the present embodiment, the front end portion 42B (holding portion) of the second electrode connecting member 40B includes clamping portions 45a and 45b, which are elastically deformable at least in the second direction and clamp the front end portion 42A (protruding end portion) of the first electrode connecting member 40A from both sides in the second direction. According to such a configuration, the front end portion 42A (protruding end portion) of the first electrode connecting member 40A is clamped and difficult to be pulled out, so it is easy to further improve the assembly workability of the battery pack 1.

[0203] In the present embodiment, when the direction intersecting the first direction and the second direction is defined as the third direction, the front end portion 42A (protruding end portion) of the first electrode connecting member 40A includes a plate portion 42p along the first direction and the third direction. The clamping portions 45a and 45b clamp the plate portion 42p from both sides of the second direction. According to such a configuration, it is possible to suppress the width of the battery pack 1 in the Y direction from increasing, while ensuring a large connection structure between the front end portion 42A of the first electrode connecting member 40A and the clamping portions 45a and 45b.

[0204] In the present embodiment, the front end portion 42B (holding portion) of the second electrode connection member 40B includes a barrel portion 140. The barrel portion 140 includes: a first end 140a on the first wiring module 20A side; and a plurality of slits SL extending from the first end 140a in a direction away from the first wiring module 20A. According to such a configuration, the barrel portion 140 having the slits SL can realize a structure for holding the front end portion 42A (protruding end portion) of the first electrode connection member 40A.

[0205] In the present embodiment, one of the first substrate 30A and the second substrate 30B includes a protrusion 71 protruding in the first direction. The other of the first substrate 30A and the second substrate 30B includes an engagement hole 72 into which the protrusion 71 is inserted. According to such a configuration, in addition to the connection between the first electrode connecting member 40A and the second electrode connecting member 40B, the first substrate 30A and the second substrate 30B are also engaged, so that a more stable assembly operation can be performed.

[0206] In the present embodiment, the first wiring module 20A and the second wiring module 20B are combined with each other after the first wiring module 20A is mounted on the first battery module 10 and the second wiring module 20B is mounted on the second battery module 10. According to such a configuration, the first electrode connecting member 40A and the second electrode connecting member 40B can be connected as part of the operation of arranging the plurality of battery modules 10 in the first direction.

[0207] In addition, in the third aspect, the wiring member 50 may not have the plurality of terminal connection portions 52A branched from each other. In addition, the wiring member 50 may not be provided with electronic components.

[0208] The above describes the embodiments and multiple variations. However, the embodiments and variations are not limited to the above examples. For example, the above variations may be implemented in combination with each other. In addition, in the above embodiments, the battery module 10 is a bipolar battery module. Alternatively, the battery module 10 may be a monopolar battery module. In addition, the first wiring module 20A may not have a substrate 30. That is, the first electrode connecting member 40A may also be directly mounted on the battery module 10. In addition, the second wiring module 20B may not have a substrate 30. That is, the second electrode connecting member 40B may also be directly mounted on the battery module 10.

[0209] The preferred embodiments of the present invention have been described and illustrated in the above content, but they are only illustrative examples of the present invention and are not limited to these. Additions, omissions, substitutions and other changes can be made without departing from the scope of the present invention. Therefore, the present invention is not limited by the aforementioned description, but only by the protection scope of the appendix.

[0210] Industrial Availability

[0211] According to the present disclosure, it is possible to provide a connection module group, an electrode connection member group, and a battery pack that can improve the assembling workability of a battery pack.

[0212] Description of Reference Numerals

[0213] 1…Battery pack

[0214] 10…Battery module

[0215] 11…Housing

[0216] 12…Battery cells

[0217] 13…Electrode terminal (detection terminal)

[0218] 13A…Positive electrode terminal (detection terminal)

[0219] 13B…Negative electrode terminal (detection terminal)

[0220] 14…Voltage detection terminal (detection terminal)

[0221] 20, 20A, 20B, 20C, 20D, 20E…wiring module

[0222] 30…Material

[0223] 30A…1st base

[0224] 30B…Second base

[0225] 34…Partition wall

[0226] 40…Electrode connecting member

[0227] 40A…1st electrode connecting member

[0228] 40B...Second electrode connecting member

[0229] 41 ... proximal end portion of electrode connecting member

[0230] 41A: proximal end portion of first electrode connecting member

[0231] 41B: proximal end portion of the second electrode connecting member

[0232] 42 ... front end portion of the electrode connecting member

[0233] 42A: Front end portion (protruding end portion) of the first electrode connecting member

[0234] 42B: Front end portion (holding portion) of the second electrode connecting member

[0235] 45a, 45b ... clamping part

[0236] 50…Wiring components

[0237] 51…Main body

[0238] 52A, 52B…Terminal connection part

[0239] 53…Wiring

[0240] 61…Thermistor

[0241] 62…Connector

[0242] 63…Fuse parts

[0243] 110…Unit balancing circuit

[0244] 111…Discharge unit (electronic components)

[0245] 111a…Resistors (electronic components)

[0246] 111b…Transistor (electronic component)

[0247] 120…Information Processing Department

[0248] 121…Chip components (electronic components)

[0249] 130…Communication Circuit Department

[0250] 131…Chip components (electronic components)

Claims

1. A connection module group, which is a component group used for a battery pack, the battery pack comprising a first battery module and a second battery module adjacent to the first battery module in a first direction, the component group comprising: a first connection module having an insulating first substrate and a first electrode connection member, wherein the insulating first substrate is arranged opposite to an end portion of the first battery module in the second direction when a direction intersecting the first direction is set as a second direction, the first electrode connection member is supported by the first substrate, the first electrode connection member includes a base end portion and a protruding end portion, the base end portion is electrically connected to a first electrode terminal of the first battery module, and the protruding end portion protrudes in the first direction; as well as A second connecting module comprises an insulating second substrate and a second electrode connecting member, wherein the insulating second substrate is arranged opposite to the end of the second battery module in the second direction, the second electrode connecting member is supported by the second substrate, the second electrode connecting member comprises a base end portion and a retaining portion, the base end portion is electrically connected to the second electrode terminal of the second battery module, and the retaining portion inserts the protruding end portion of the first electrode connecting member of the first connecting module from the first direction and retains it.

2. The connection module group according to claim 1, wherein: The holding portion includes a portion that is elastically deformable in a direction intersecting the first direction, and holds the protruding end portion.

3. The connection module group according to claim 1 or 2, wherein: The holding portion includes a clamping portion that is elastically deformable at least in the second direction and clamps the protruding end portion from both sides in the second direction.

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

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

6. The connection module group according to claim 1 or 2, wherein: One of the first substrate and the second substrate 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.

7. The connection module group according to claim 1 or 2, wherein: The first connection module and the second connection module are combined with each other after the first connection module is mounted on the first battery module and the second connection module is mounted on the second battery module.

8. An electrode connection member group, which is a member group used for a battery pack, the battery pack includes a first battery module and a second battery module adjacent to the first battery module in a first direction, and when a direction intersecting the first direction is set as a second direction, the member group includes: a first electrode connecting member including a base end portion and a protruding end portion, wherein the base end portion 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 the protruding end portion protrudes in the first direction; as well as A second electrode connecting member includes a base end portion and a retaining portion, wherein the base end portion overlaps with one end portion of the second battery module when viewed from the second direction and is electrically connected to the second electrode terminal of the second battery module, and the retaining portion has a portion that can be elastically deformed in a direction intersecting the first direction, and inserts the protruding end portion of the first electrode connecting member from the first direction and retains it.

9. A battery pack comprising: The first battery module, a second battery module adjacent to the first battery module in a first direction, a first connection module having an insulating first substrate and a first electrode connection member, wherein the insulating first substrate is arranged opposite to an end portion of the first battery module in the second direction when a direction intersecting the first direction is set as a second direction, the first electrode connection member is supported by the first substrate, the first electrode connection member includes a base end portion and a protruding end portion, the base end portion is electrically connected to a first electrode terminal of the first battery module, and the protruding end portion protrudes in the first direction; as well as A second connecting module comprises an insulating second substrate and a second electrode connecting member, wherein the insulating second substrate is arranged opposite to the end of the second battery module in the second direction, the second electrode connecting member is supported by the second substrate, the second electrode connecting member comprises a base end portion and a retaining portion, the base end portion is electrically connected to the second electrode terminal of the second battery module, and the retaining portion inserts the protruding end portion of the first electrode connecting member of the first connecting module from the first direction and retains it.

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