JP2016207584A - Battery pack and conductive member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack in novel configuration where inconvenience is further reduced.SOLUTION: The battery pack comprises: a plurality of battery cells each including an electrode part; a plurality of terminal parts 31-34 which are formed in a tabular shape including contact surfaces in contact with the electrode parts of the plurality of battery cells and disposed while being separated in a direction along contact surfaces 31a-34a and overlapped with each other in the direction along the contact surfaces 31a-34a; first bridge parts 35 and 37 which include portions separated from the contact surfaces 31a-34a in a direction across the contact surfaces 31a-34a and bridge two terminal parts in a bent state; and second bridge parts 36 and 38 which extend in a direction across the first bridge parts 35 and 37, include portions separated from the contact surfaces 31a-34a in the direction across the contact surfaces 31a-34a, and bridge two terminal parts or the two first bridge parts 35 and 37 in a bent state.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to an assembled battery and a conductive member.

  Conventionally, a battery pack provided with a bus bar for connecting electrode portions of a plurality of battery cells is known.

JP 2011-071097 A

  In this type of structure, for example, it is preferable if a battery pack and a conductive member having a new configuration with less inconvenience can be obtained.

  The assembled battery according to the embodiment includes, for example, a plurality of battery cells and a conductive member. Each of the plurality of battery cells has an electrode part. The conductive member is configured in a plate shape having a contact surface that comes into contact with each electrode portion of the plurality of battery cells, and is separated from each other in a direction along the contact surface and overlaps with each other in a direction along the contact surface. A first bridge portion that crosses between the two terminal portions in a bent state with a portion separated from the contact surface in a direction intersecting the contact surface, and a contact extending in the direction intersecting the first bridge portion. A second bridge portion extending between the two terminal portions or between the two first bridge portions in a bent state with a portion away from the surface in a direction intersecting the contact surface.

FIG. 1 is an exemplary perspective view of the battery pack according to the first embodiment. FIG. 2 is an exemplary perspective view of the conductive member of the battery pack according to the first embodiment. 3 is a cross-sectional view taken along the line III-III in FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is an exemplary perspective view of the battery pack according to the second embodiment. FIG. 6 is an exemplary perspective view of the conductive member of the assembled battery according to the second embodiment. 7 is a sectional view taken along line VII-VII in FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG.

  Hereinafter, exemplary embodiments of the present invention are disclosed. The configuration of the embodiment shown below, and the operation and result (effect) brought about by the configuration are examples. The present invention can be realized by configurations other than those disclosed in the following embodiments. Further, according to the present invention, at least one of various effects (including derivative effects) obtained by the configuration can be obtained.

  Moreover, the same component is contained in several embodiment disclosed below. Therefore, below, the same code | symbol is provided to those similar components, and the overlapping description is abbreviate | omitted.

<First Embodiment>
As shown in FIG. 1, the assembled battery 1 includes, for example, a plurality of battery cells 2 (unit cells) and a conductive member 3 (bus bar). The assembled battery 1 is installed in various devices, machines, facilities, and the like, and is used as a power source for these various devices, machines, and facilities. For example, the assembled battery 1 is used not only as a mobile power source such as a power source for an automobile or a bicycle (moving body) but also as a stationary power source such as a power source for a POS (Point Of Sales) system. Can be used. Moreover, it is also possible to mount a plurality of assembled batteries 1 shown in the present embodiment as a set connected in series or in parallel to various devices. Therefore, the assembled battery 1 can also be referred to as a battery module, a battery unit, or the like. In addition, the number, arrangement | positioning, etc. of the battery cell 2 and the electrically-conductive member 3 which are contained in the assembled battery 1 are not limited to what is disclosed by this embodiment. Further, the assembled battery 1 includes a housing for accommodating a plurality of battery cells 2, a conductive member (bus bar) different from the conductive member 3, wiring for monitoring the voltage and temperature of the battery cell 2, and a monitoring board. In addition, a control board for battery control may be included.

  Each of the plurality of battery cells 2 includes an electrode unit 10 and a housing 20. Moreover, the electrode part 10 has the positive electrode terminal 23 and the negative electrode terminal 24, and the housing | casing 20 has several wall part 20a-20f. As shown in FIG. 1, in the present embodiment, at least one of the plurality of wall portions 20a to 20f (for example, the wall portion 20e) can be used in a posture along a plane. In the following detailed description, for the sake of convenience, the direction is defined based on the posture of the wall 20e along the plane. The X direction is the thickness direction of the battery cell 2, the Y direction is the width direction of the battery cell 2, and the Z direction is the height direction of the battery cell 2. The X direction, the Y direction, and the Z direction are orthogonal to each other.

  The battery cell 2 can be composed of, for example, a lithium ion secondary battery. The battery cell 2 may be another secondary battery such as a nickel metal hydride battery, a nickel cadmium battery, or a lead storage battery. A lithium ion secondary battery is a kind of non-aqueous electrolyte secondary battery, and lithium ions in the electrolyte are responsible for electrical conduction. Examples of the positive electrode material include lithium manganese composite oxide, lithium nickel composite oxide, lithium cobalt composite oxide, lithium nickel cobalt composite oxide, lithium manganese cobalt composite oxide, spinel type lithium manganese nickel composite oxide, and olivine. A lithium phosphorus oxide having a structure is used, and as the negative electrode material, for example, an oxide material such as lithium titanate (LTO), an oxide material such as niobium composite oxide, or the like is used. Moreover, as electrolyte (for example, electrolyte solution), lithium salt, such as fluorine-type complex salt (for example, LiBF4, LiPF6), etc. were mix | blended, for example, ethylene carbonate, propylene carbonate, diethyl carbonate, ethyl methyl carbonate, dimethyl carbonate, etc. An organic solvent or the like may be used alone or in combination.

  As shown in FIG. 1, the housing 20 of the battery cell 2 is configured in a flat rectangular parallelepiped shape that is thin in the X direction. The housing | casing 20 has four edge part 20g-20j (side part, edge part) in the eyes | visual_axis of a X direction. Moreover, the housing | casing 20 has several wall part 20a-20f. Each of the wall portion 20a and the wall portion 20c is along a direction (Y direction and Z direction) intersecting (orthogonal) with the X direction, and is provided in parallel to each other with an interval in the X direction. Moreover, both the wall part 20b and the wall part 20d are along the direction (X direction and Z direction) which cross | intersects (perpendicularly) the Y direction, and it is provided in parallel with the Y direction at intervals. The wall portions 20a to 20d can be referred to as side wall portions or the like. The wall portions 20a and 20c are examples of long side portions of the side wall portions, and the wall portions 20b and 20d are examples of short side portions of the side wall portions. Moreover, both the wall part 20e and the wall part 20f are along the direction (X direction and Y direction) which cross | intersects (perpendicularly) the Z direction, and it is provided in parallel mutually at intervals in the Z direction. The wall portion 20e can be referred to as a lower wall portion, a bottom wall portion, or the like, and the wall portion 20f can be referred to as an upper wall portion, a top wall portion, or the like.

  Moreover, the housing | casing 20 is comprised by combining several components (divided body). Specifically, the housing 20 includes, for example, a first housing member 21 (case, lower case) and a second housing member 22 (lid, cover, cover, upper case). The first housing member 21 has at least wall portions 20a to 20e, and the second housing member 22 has at least a wall portion 20f. The first housing member 21 is configured in a rectangular parallelepiped box shape in which one end side (upper end side) is opened. For example, an electrode body, an electrolytic solution, and the like are accommodated in the first housing member 21. The electrode body includes, for example, a positive electrode sheet, a negative electrode sheet, and an insulating layer (separator). The electrode body may be formed in a flat shape by winding (folding) a positive electrode sheet, a negative electrode sheet, and an insulating layer. The electrode body is an electrode group and functions as a power generation element. 3 and 4, for convenience, the internal structure of the battery cell 2 such as an electrode body is not shown.

  As shown in FIG. 1, the second housing member 22 is configured in a rectangular plate shape that is long in the Y direction. The second housing member 22 closes the opened portion of the first housing member 21 and is integrated with the first housing member 21. The second housing member 22 can also be referred to as a lid member. The first housing member 21 and the second housing member 22 can be coupled in an airtight and liquid-tight manner, for example, by welding. The first housing member 21 and the second housing member 22 are made of, for example, a metal material or a synthetic resin material.

  In addition, a positive electrode terminal 23, a negative electrode terminal 24, and a valve portion 25 are provided on the wall portion 20 f of the second housing member 22. As shown in FIG. 1, in the present embodiment, the negative electrode terminal 24 is positioned on one side of the wall portion 20f in the Y direction (left side in FIG. 1), and the positive electrode terminal 23 is on the other side of the wall portion 20f in the Y direction. Is located on the side (right side of FIG. 1). The positive electrode terminal 23 is provided in a state of penetrating the wall portion 20 f in the Z direction, and is electrically connected to the positive electrode sheet of the electrode body in the housing 20. The negative electrode terminal 24 is provided in a state of penetrating the wall portion 20 f in the Z direction, and is electrically connected to the negative electrode sheet of the electrode body in the housing 20. As shown in FIG. 4, the surface 23a (exposed surface, connecting surface, top surface) of the positive electrode terminal 23 and the surface 24a (exposed surface, connecting surface, top surface) of the negative electrode terminal 24 are the outer surface 20f1 of the wall portion 20f. It is located on the one side (upper side) in the Z direction (projects). The surfaces 23a and 24a and the outer surface 20f1 are substantially parallel. Moreover, the surface 23a and the surface 24a are substantially flush. The positive terminal 23 and the negative terminal 24 can be made of a conductive material.

  In addition, as shown in FIG. 1, the valve portion 25 is provided between the positive electrode terminal 23 and the negative electrode terminal 24 that are spaced apart from each other in the Y direction. The valve unit 25 is opened when the pressure in the battery cell 2 becomes higher than the threshold, and reduces the pressure in the battery cell 2.

  In the present embodiment, for example, the wall portion 20f is provided with protruding portions 26 and 27 protruding toward one side in the Z direction (upper side, conductive member 3 side). As shown in FIG. 4, the protrusion 26 is located on one side of the negative electrode terminal 24 in the Y direction (left side of FIG. 4), and the protrusion 27 is one side of the positive electrode terminal 23 in the Y direction (FIG. 4). It is located on the left side. In the present embodiment, the protruding amount (the height in the Z direction) of the protruding portion 27 is smaller (lower) than the protruding amount (the height in the Z direction) of the protruding portion 26. Specifically, the distal end portion of the protruding portion 27 is positioned on the other side in the Z direction (lower side, the wall portion 20f side) with respect to the surface 23a of the positive electrode terminal 23, and the distal end portion of the protruding portion 26 is positioned on the negative electrode terminal 24. It is located on one side (upper side) in the Z direction with respect to the surface 24a.

  As shown in FIG. 1, the plurality of battery cells 2 are arranged in the X direction and the Y direction with the respective wall portions 20 f (second housing member 22) facing the same direction (upward direction in FIG. 1). Are lined up. Moreover, the some battery cell 2 has faced the same direction (left direction of FIG. 1) also about each wall part 20b, for example. Accordingly, in each of the plurality of battery cells 2, each negative electrode terminal 24 is positioned on one side in the Y direction (left side in FIG. 1), and each positive electrode terminal 23 is positioned on the other side in the Y direction (right side in FIG. 1). The

  In the present embodiment, the electrode portions 10 of the four battery cells 2 adjacent in the X direction and the Y direction are electrically connected to each other through the conductive member 3. Specifically, in the present embodiment, for example, one positive terminal 23 and the other negative terminal 24 of two battery cells 2 adjacent in the Y direction are connected in series by the conductive member 3 and adjacent in the X direction. One positive terminal 23 (negative terminal 24) and the other positive terminal 23 (negative terminal 24) of two sets of battery cells 2 to be connected are connected in parallel.

  As illustrated in FIG. 2, the conductive member 3 (bus bar) includes, for example, a plurality of terminal portions 31 to 34 and a plurality of bridge portions 35 to 38. The terminal portions 31 to 34 are also referred to as wall portions and the like, and the bridge portions 35 to 38 can be referred to as span portions, connection portions, bent portions, and the like. For example, the conductive member 3 is formed in a crank shape by bending a single plate-like (band-like or strip-like) member at four locations (bridge portions 35 to 38).

  As shown in FIG. 2, each of the terminal portions 31 to 34 is configured in a rectangular plate shape (band shape). The terminal portions 31 to 34 are all along a direction (X direction and Y direction) intersecting (orthogonal) with the Z direction, and are provided in parallel to each other with an interval in the X direction and the Y direction. Further, the terminal portions 31 to 34 have surfaces 31 a to 34 a (contact surfaces, lower surfaces) that come into contact with the electrode portion 10, respectively. As shown in FIGS. 3 and 4, the surfaces 31 a to 34 a are substantially parallel to the outer surface 20 f 1 of the wall portion 20 f and the surfaces 23 a and 24 a of the electrode portion 10 (the positive electrode terminal 23 and the negative electrode terminal 24). The surfaces 31a to 34a are substantially flush with each other.

  The terminal portions 31 to 34 are provided with openings 31r to 34r penetrating the terminal portions 31 to 34 along the Z direction. As shown in FIG. 2, the openings 31 r to 34 r are located at substantially center portions of the respective terminal portions 31 to 34. The openings 31r to 34r include openings 31r1 to 34r1 and openings 31r2 to 34r2. The openings 31r2 to 34r2 are provided on the surfaces 31a to 34a side of the terminal portions 31 to 34, and are configured as concave portions opened toward the other side in the Z direction (lower side, the electrode portion 10 side). The openings 31r1 to 34r1 are provided on the surfaces 31b to 34b (upper surface, top surface) opposite to the surfaces 31a to 34a of the terminal portions 31 to 34, and open toward one side (upper side) in the Z direction. It is comprised as a recessed part made. As shown in FIGS. 2 to 4, in this embodiment, the opening widths (diameters) of the openings 31r2 to 34r2 are configured to be smaller than the opening widths (diameters) of the openings 31r1 to 34r1, and the openings 31r1 to 34r1. And the openings 31r2 to 34r2 communicate with each other along the Z direction. In the present embodiment, for example, the edges (inner surfaces) of the openings 31r2 to 34r2 and the surfaces 23a and 24a of the electrode unit 10 (the positive terminal 23 and the negative terminal 24) are coupled to each other by welding or the like. Thereby, the electrode part 10 and the conductive member 3 are mechanically connected (fixed) and electrically connected.

  Further, the terminal portions 31 to 34 are provided with openings 31s to 34s on both sides in the Y direction with the respective openings 31r to 34r therebetween. The openings 31 s to 34 s are configured as through holes that penetrate the respective terminal portions 31 to 34 along the Z direction, for example. As shown in FIG. 4, in this embodiment, the opening width (diameter) of the openings 31 s to 34 s is configured to be slightly larger than the width (diameter) of the protrusions 26 and 27. In the present embodiment, for example, the projecting portion 26 is inserted into the openings 31 s and 34 s on one side in the Y direction (left side in FIG. 4) of the pair of the plurality of openings 31 s to 34 s, whereby the conductive member 3 can be positioned in the X direction and the Y direction with respect to the electrode part 10. Therefore, according to the present embodiment, for example, the operation of welding the conductive member 3 and the electrode portion 10 by positioning the openings 31 s and 34 s and the protrusion 26 is easier, smoother, or more accurate. It is easy to do well. In the present embodiment, at the time of positioning the conductive member 3 described above, the openings 32 s, through the openings 32 s, 33 s on one side in the Y direction (left side in FIG. 4) among the plurality of pairs of openings 31 s to 34 s. By aligning 33s and the protrusion 27, the conductive member 3 can be aligned at a correct position more quickly or with higher accuracy.

  As shown in FIGS. 2 to 4, the bridge portions 35 to 38 include, for example, two first wall portions 35 a to 38 a, one second wall portion 35 b to 38 b, and two first bent portions. 35c to 38c, two second bent portions 35d to 38d, etc., respectively. The two first wall portions 35a to 38a (standing wall portion and vertical wall portion) are connected to the terminal portions 31 to 34 via the first bent portions 35c to 38c, respectively. The first wall portions 35a to 38a extend (stand up) in a direction intersecting with the terminal portions 31 to 34 (surfaces 31a to 34a). The second wall portions 35b to 38b (lateral wall portions) are provided between the two first wall portions 35a to 38a at positions separated from the terminal portions 31 to 34 in the Z direction. The second wall portions 35b to 38b are connected to the two first wall portions 35a to 38a via the two second bent portions 35d to 38d. The second wall portions 35b to 38b are provided substantially in parallel with the terminal portions 31 to 34.

  As shown in FIG. 2, in the present embodiment, the bridge portion 35 is provided across the terminal portion 31 and the terminal portion 32 that are spaced apart from each other in the Y direction among the plurality of terminal portions 31 to 34. The bridge portion 37 is provided between the terminal portion 33 and the terminal portion 34. As shown in FIG. 4, the cross-section along the YZ plane of the bridge portions 35 and 37 is configured in a substantially U shape that is open toward the other side (lower side, electrode portion 10 side) in the Z direction. Yes. According to the present embodiment, since the conductive member 3 is provided with the bridge portions 35 and 37, for example, when an external force such as an impact or vibration along the Y direction is input to the assembled battery 1, or the conductive member 3. When heat is deformed along the Y direction, the stress tends to concentrate on the first bent portions 35c and 37c of the bridge portions 35 and 37, the second bent portions 35d and 37d, and the like. Therefore, for example, compared to the case where the bridge portions 35 and 37 are not provided on the conductive member 3, the concentration of stress is relaxed at places other than the first bent portions 35c and 37c and the second bent portions 35d and 37d. The local stress is more likely to be reduced. In the present embodiment, the bridge portions 35 and 37 are an example of a first bridge portion.

  As shown in FIG. 2, in the present embodiment, the bridge portion 36 extends between the terminal portion 32 and the terminal portion 33 that are spaced apart from each other in the X direction among the plurality of terminal portions 31 to 34. The bridge portion 38 is provided between the terminal portion 31 and the terminal portion 34. That is, the bridge portions 36 and 38 extend in a direction (X direction) intersecting with the bridge portions 35 and 37 extending in the Y direction. As shown in FIG. 3, the cross section along the XZ plane of the bridge portions 36 and 38 is configured in a substantially U shape that is open toward the other side in the Z direction (lower side, the electrode portion 10 side). Yes. According to this embodiment, since the bridge portions 36 and 38 are provided on the conductive member 3, for example, when an external force such as an impact or vibration along the X direction is input to the assembled battery 1, or the conductive member 3. When heat is deformed along the X direction, the stress tends to concentrate on the first bent portions 36c, 38c of the bridge portions 36, 38, the second bent portions 36d, 38d, and the like. Therefore, for example, compared to the case where the bridge portions 36 and 38 are not provided on the conductive member 3, the stress at places other than the first bent portions 36c and 38c and the second bent portions 36d and 38d is easily relieved. Local stress is more likely to be reduced. In the present embodiment, the bridge portions 36 and 38 are an example of a second bridge portion.

  As described above, in the present embodiment, for example, the assembled battery 1 includes the plurality of battery cells 2 each having the electrode portion 10 and the surfaces 31 a to 34 a that are in contact with the electrode portions 10 of the plurality of battery cells 2. A plurality of terminal portions 31 to 34 arranged in a plate shape having a (contact surface) and separated from each other in the direction along the surfaces 31a to 34a (X direction and Y direction) and overlapped in the direction along the surfaces 31a to 34a. And terminal portions 31 as two terminal portions in a bent state having portions (second wall portions 35b and 37b) separated from the surfaces 31a to 34a in the direction (Z direction) intersecting the surfaces 31a to 34a. Bridge portions 35 and 37 (first bridge portion) that cross between the terminal portion 32 and the terminal portion 33 and the terminal portion 34, and surfaces extending in the direction intersecting the bridge portions 35 and 37 (X direction) 31a to 34a to face 31 Between the terminal portion 32 and the terminal portion 33 as two terminal portions in a bent state having portions (second wall portions 36b, 38b) separated in a direction (Z direction) intersecting with .about.34a and the terminals. And bridge portions 36 and 38 (second bridge portions) crossing between the portion 31 and the terminal portion 34. Therefore, according to the present embodiment, for example, the bridge portions 35 to 38 can cope with external forces or thermal deformations in two directions (X direction and Y direction) along the surfaces 31 a to 34 a. Therefore, for example, the assembled battery 1 and the conductive member 3 can be easily obtained as compared with the conventional configuration in which the conductive member is provided with a bridge portion corresponding to one direction, in which local stress is more easily reduced. In addition, for example, compared to the conventional configuration, the conductive member 3 having the bridge portions 35 to 38 can easily reduce the number of parts of the assembled battery 1, so that there is an advantage that labor required for manufacturing the assembled battery 1 can be easily reduced. .

  In addition, although the case where the electrode part 10 and the terminal parts 31-34 were couple | bonded by welding was illustrated in this embodiment, it is not limited to this, For example, you may couple | bond together with coupling tools, such as a screw. . Moreover, in this embodiment, although the case where the four battery cells 2 were electrically connected by the conductive member 3 was illustrated, it is not limited to this, For example, three or five or more batteries are set by the conductive member 3 The cell 2 may be electrically connected. In this case, the number, layout, and the like of the terminal portions 31 to 34 and the bridge portions 35 to 38 can be changed as appropriate.

Second Embodiment
The assembled battery 1A of the embodiment shown in FIGS. 5 to 8 has the same configuration as the assembled battery 1 of the first embodiment. Therefore, also according to this embodiment, the same result (effect) based on the same configuration as that of the first embodiment can be obtained.

  However, in this embodiment, for example, as shown in FIG. 6, the bridge portion 39 (second bridge portion) and the bridge portion 35 (first bridge portion) that are spaced apart in the X direction are bridged. It is provided across the portion 37 (first bridge portion). As shown in FIG. 7, the bridge portion 39 includes, for example, two first wall portions 39a, one second wall portion 39b, two first bent portions 39c, and two second wall portions 39b. It has a bent portion 39d and the like. The two first wall portions 39a (vertical wall portions) are connected to the second wall portions 35b and 37b of the bridge portions 35 and 37 via the first bent portions 39c, respectively. In the present embodiment, the first wall portion 39a extends from the second wall portions 35b and 37b to the other side (lower side) in the Z direction. The second wall portion 39b (lateral wall portion) is provided between the two first wall portions 39a at a position away from the second wall portions 35b and 37b in the Z direction. The second wall portion 39b is connected to the two first wall portions 39a via two second bent portions 39d. As shown in FIG. 7, the cross section of the bridge portion 39 along the XZ plane is formed in a substantially U shape that is open toward one side (upper side) in the Z direction. Therefore, according to the present embodiment, for example, the bridge portions 35, 37, and 39 can cope with external forces or thermal deformations in two directions (X direction and Y direction) along the surfaces 31a to 34a. In the present embodiment, the first wall portion 39a of the bridge portion 39 extends from the second wall portions 35b and 37b to the other side in the Z direction (lower side, the electrode portion 10 side). Compared to the case where the wall portion 39a extends from the second wall portions 35b and 37b to one side (upper side) in the Z direction, the conductive member 3A, and hence the assembled battery 1A, may be more easily configured in the Z direction.

  As mentioned above, although embodiment of this invention was illustrated, the said embodiment is an example to the last, Comprising: It is not intending limiting the range of invention. The above embodiment can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention. The above embodiments are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof. The present invention can be realized by configurations other than those disclosed in the above embodiments, and various effects (including derivative effects) obtained by the basic configuration (technical features) can be obtained. is there. In addition, the specifications of each component (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) should be changed as appropriate. Can do.

  DESCRIPTION OF SYMBOLS 1,1A ... Battery assembly, 2 ... Battery cell, 3, 3A ... Conductive member, 10 ... Electrode part, 31-34 ... Terminal part, 31a-34a ... Surface (contact surface), 35, 37 ... Bridge part (1st Bridge portion (second bridge portion), X ... direction along the contact surface, Y ... direction along the contact surface, Z ... direction intersecting with the contact surface.

Claims (2)

A plurality of battery cells each having an electrode portion;
A plurality of terminal portions configured in a plate shape having a contact surface that comes into contact with each of the electrode portions of the plurality of battery cells, separated from each other in a direction along the contact surface, and overlapped with each other in a direction along the contact surface. And a first bridge portion that crosses between the two terminal portions in a bent state having a portion separated from the contact surface in a direction intersecting the contact surface, and intersected with the first bridge portion. A second bridge that extends in a direction and extends between the two terminal portions or between the two first bridge portions in a bent state with a portion separated from the contact surface in a direction intersecting the contact surface A conductive member having a portion;
A battery pack comprising A plurality of terminal portions that are configured in a plate shape having contact surfaces that come into contact with the respective electrode portions of the plurality of battery cells, and that are separated from each other in a direction along the contact surfaces and overlap each other in a direction along the contact surfaces; ,
A first bridge portion that crosses between the two terminal portions in a bent state having a portion away from the contact surface in a direction intersecting the contact surface;
Extending in a direction intersecting with the first bridge portion, bent between two contact portions or in a state of being bent with a portion away from the contact surface in a direction intersecting with the contact surface. A second bridge section across the bridge section;
A conductive member comprising:

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