Battery pack

Abstract

To obtain a battery pack which can inhibit size increase.SOLUTION: A battery pack 10 includes a battery case 20, an electric component 14, a support member 40, and a fitting part 60. The battery case 20 houses a battery. The electric component 14 is connected to the battery and is provided adjacent to the battery case 20. The electric component 14 is mounted on the support member 40 and the support member 40 supports the electric component 14. The fitting part 60 is provided on an outer wall 26A facing the support member 40 of the battery case 20 and may fit in the support member 40.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a battery pack including a secondary battery. [Background technology]

[0002] Patent Document 1 discloses a battery pack including a battery case that houses a battery and an electrical component case that includes a support member that is attached to the outer periphery of the battery case and supports electrical components. The support member of the battery pack disclosed in Patent Document 1 is provided with a fragile portion, and when an impact is applied to the electrical component case, the fragile portion is deformed to absorb the impact. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-117688 Summary of the Invention [Problem to be solved by the invention]

[0004] As described above, when the fragile portion of the battery pack is deformed to absorb impact, the length of the fragile portion in the direction in which the impact is applied needs to be equal to or greater than a predetermined dimension. Therefore, the battery case needs to be designed taking into account the amount of deformation when the fragile portion is deformed, which may result in an increased size of the battery pack.

[0005] In consideration of the above, an object of the present invention is to provide a battery pack that can be prevented from becoming large. [Means for solving the problem]

[0006] The battery pack according to the present invention as set forth in claim 1 comprises a battery case that houses a battery, an electric component that is provided adjacent to the battery case and connected to the battery, and a battery pack that is mounted with the electric component and controls the electric component. From the bottom of the vehicle a support member for supporting the battery case; The electrical components andthe support member; , in the direction in which the battery case and the electrical component are adjacent to each other The support member includes a fitting portion provided on the opposing outer wall and capable of fitting with at least a portion of the support member.

[0007] In the battery pack according to the first aspect of the present invention, a fitting portion that can fit into at least a part of the support member is provided on an outer wall of the battery case facing the support member that supports the electrical component. Therefore, when an impact is applied from the electrical component side in the direction in which the battery case and the electrical component are adjacent, the support member fits into the fitting portion, thereby suppressing movement of the support member due to tilting, rotation, sliding, etc. This suppresses crushing of the support member, thereby suppressing an increase in the size of the battery pack that would be required to consider the amount of deformation due to crushing of the support member.

[0008] The battery pack of the present invention described in claim 2 is configured as described in claim 1, wherein the support member includes a mounting portion having a flat surface on which the electrical component is mounted, and a support portion extending below the mounting portion and supporting the mounting portion.

[0009] In the battery pack according to the present invention as set forth in claim 2, the support member includes a mounting portion having a flat surface on which an electric component is mounted, and a support portion that supports the mounting portion, so that the mounting portion on which the electric component is mounted can be supported by the support portion.

[0010] The battery pack of the present invention described in claim 3 is configured as described in claim 2, wherein the mounting portions are provided on both sides in a direction perpendicular to the direction in which the battery case and the electrical component are adjacent, and the support portion has two vertical portions extending vertically downward from the mounting portions on both sides, and a connecting portion connecting the lower ends of the two vertical portions together.

[0011] The battery pack according to the present invention, as described in claim 3, includes two vertical portions extending downward from the mounting portions on both sides on which the electrical components are mounted, and a connecting portion connecting the lower ends of the two vertical portions. Therefore, the support member is formed into an inverted hat shape by the two mounting portions, the two vertical portions, and the connecting portion, thereby achieving a structure with increased rigidity. Furthermore, the two mounting portions are raised in height by the two vertical portions, thereby shortening the distance from the battery by the increased height. This allows the length of connecting wires, such as wire harnesses, that connect the battery and the electrical components to be shortened.

[0012] A battery pack according to the present invention as set forth in claim 4 is the battery pack as set forth in claim 2 or claim 3, wherein the fitting portion is fitted with at least the support portion.

[0013] In the battery pack according to the present invention as set forth in claim 4, the fitting portion is fitted with at least the support portion, so that movement of at least the support portion due to tilting, rotation, sliding, etc. can be suppressed.

[0014] The battery pack of the present invention described in claim 5 is configured as any one of claims 1 to 4, wherein the fitting portion is pre-fitted with the battery case side end portion of the support member in the adjacent direction of the battery case and the electrical component, and is fitted even more deeply with the battery case side end portion when an impact is applied.

[0015] In the battery pack according to the present invention described in claim 5, the fitting portion is fitted in advance with the battery case side end portion in the adjacent direction of the support member in the direction in which the battery case and the electrical component are adjacent. Therefore, when an impact is applied, the battery case side end portion of the support member is further pushed into the fitting portion while being fitted with the fitting portion. As a result, the battery case side end portion of the support member is guided by the fitting portion and fitted deeper into the fitting portion, so that the support member and the fitting portion can be properly fitted together when an impact is applied. The battery pack according to the present invention as described in claim 6 comprises a battery case that houses a battery, an electrical component provided adjacent to the battery case and connected to the battery, a support member on which the electrical component is mounted and supports the electrical component, and a fitting portion provided on an outer wall of the battery case facing the support member and capable of fitting with at least a part of the support member, wherein the support member comprises a mounting portion having a flat surface on which the electrical component is mounted, and a support portion extending below the mounting portion and supporting the mounting portion, the mounting portions being provided on both sides in a direction perpendicular to the direction in which the battery case and the electrical component are adjacent to each other, and the support portion comprises two vertical portions extending vertically downward from the mounting portions on both sides, and a connection portion connecting the lower ends of the two vertical portions together. The battery pack of the present invention described in claim 7 comprises a battery case that houses a battery, an electrical component provided adjacent to the battery case and connected to the battery, a support member on which the electrical component is mounted and supports the electrical component, and a fitting portion that is provided on an outer wall of the battery case facing the support member and can fit with at least a part of the support member, wherein the support member comprises a mounting portion having a flat surface on which the electrical component is mounted, and a support portion that extends below the mounting portion and supports the mounting portion, and the fitting portion is fitted with at least the support portion. The battery pack of the present invention described in claim 8 comprises a battery case that houses a battery, an electrical component that is provided adjacent to the battery case and connected to the battery, a support member on which the electrical component is mounted and supports the electrical component, and a fitting portion that is provided on an outer wall of the battery case that faces the support member and can fit with at least a part of the support member, in the direction in which the battery case and the electrical component are adjacent to each other, and the fitting portion is fitted in advance with the side end of the battery case in the adjacent direction of the support member, and fits even more deeply with the side end of the battery case when an impact is applied. [Effects of the Invention]

[0016] As described above, the battery pack according to the present invention has the excellent effect of being able to prevent the battery pack from becoming large. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a top view schematically showing the configuration of a battery pack according to an embodiment of the present invention; [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along line BB in FIG. [Figure 4] FIG. 1 is a top view schematically showing the configuration of a conventional battery pack. [Figure 5] 5 is a cross-sectional view taken along line CC in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0018] A battery pack 10 according to one embodiment of the present invention will be described below with reference to Figures 1 to 3. In this embodiment, the battery pack 10 is mounted on an electric vehicle (not shown), such as an electric vehicle or a hybrid vehicle, as an example. Note that the arrow UP shown as appropriate in each figure indicates the upper side in the vertical direction of the vehicle, and the arrow W indicates the width direction of the vehicle. In addition, in each figure, the same or corresponding parts are given the same reference numerals, and their description will not be repeated.

[0019] As shown in FIG. 1, the battery pack 10 includes a battery case 20 that houses a battery module 12, and an electric component case 30 that houses electric components 14 such as a junction box that are connected to the battery module 12.

[0020] The battery case 20 houses a battery module 12 in which a plurality of batteries (not shown) are stacked in a predetermined direction. In this embodiment, the batteries are stacked in the left-right direction of the vehicle, for example. In this embodiment, the batteries store, for example, power for driving a motor generator and supply power to the motor generator via a power control unit (neither is shown). As the batteries, for example, secondary batteries such as nickel-metal hydride batteries or lithium-ion batteries are used. Note that the battery module 12 may be composed of a single battery.

[0021] The battery case 20 is a die-cast case formed by die-casting using a metal such as aluminum. As shown in FIG. 1 , the battery case 20 includes a bottom wall 22 on which the battery module 12 is mounted, and a front wall 24A and a rear wall 24B extending upward from the bottom wall 22 on both sides in the vehicle longitudinal direction. The battery case 20 also includes a left wall 26A and a right wall 26B extending upward from the bottom wall 22 on both sides in the vehicle width direction. The bottom wall 22, the front wall 24A, the rear wall 24B, the left wall 26A, and the right wall 26B are each provided with ribs (not shown) to prevent deformation, increase strength, and improve the flow of molten metal. These ribs will be described in detail later.

[0022] The electric component case 30 houses the electric components 14 to be connected to the battery module 12 (batteries). The electric component case 30 is made of, for example, resin or metal, but the material is not particularly limited. When the electric component case 30 is made of resin, it is desirable to cover the outer periphery of the electric component case 30 with a metal case or the like in order to provide an electromagnetic shield for attenuating electromagnetic waves.

[0023] The electric component case 30 is provided on the outer peripheral surface of the battery case 20. In this embodiment, the electric component case 30 is provided adjacent to the left wall 26A of the battery case 20 and is fastened to the left wall 26A with bolts or the like. Therefore, the electric components 14 housed in the electric component case 30 are provided adjacent to the battery case 20. Note that the method of fastening the electric component case 30 is not limited to bolt fastening, and known techniques can be used.

[0024] 1, the electric component case 30 includes a bottom wall 32 on which electric components 14 are mounted via support members 40 (described later), and a front wall 34A and a rear wall 34B extending upward from the bottom wall 32 on both sides in the vehicle longitudinal direction. The electric component case 30 also includes a left wall 36 extending upward from the bottom wall 32 on the left side in the vehicle width direction. In this embodiment, the rigidity of the bottom wall 32, front wall 34A, and rear wall 34B of the electric component case 30 is configured to be lower than the rigidity of the battery case 20. In other words, the electric component case 30 is configured to deform more easily in the vehicle width direction than the battery case 20 when an impact is applied.

[0025] The electrical component 14 includes a junction box that uses relays to supply and cut off power to the battery module 12 and distribute power from the battery module 12 to a power drive unit (not shown), and a connector for connecting a wire harness 50 that connects the junction box to a battery ECU (Electronic Control Unit) (not shown) that manages the battery module 12. As shown in Fig. 1, one end of the wire harness 50 is connected to the connector of the electrical component 14, and the other end is connected to the battery ECU of the battery module 12.

[0026] The electrical component 14 is supported by a support member 40 within the electrical component case 30. As shown in Fig. 2, the support member 40 includes a mounting portion 42 having a flat surface 40A on which the electrical component 14 is mounted, and a support portion 44 extending below the mounting portion 42 and supporting the mounting portion 42. In this embodiment, the mounting portions 42 are provided on both sides in a direction perpendicular to the direction in which the battery case 20 and the electrical component 14 are adjacent to each other, i.e., in the front-to-rear direction of the vehicle, and the electrical component 14 is fixed by fastening a bolt 40B from the underside, for example.

[0027] The support portion 44 also includes two vertical portions 46 extending substantially vertically downward from each of the mounting portions 42 on both sides in the vehicle longitudinal direction, and a connecting portion 48 connecting the lower ends of the two vertical portions 46. A bottom surface 48A of the connecting portion 48 is fixed to the upper surface of the bottom wall 32 of the electrical component case 30, for example, by bolting.

[0028] 2, support member 40 is formed in an inverted hat shape and is composed of two mounting portions 42, two vertical portions 46, and a connecting portion 48. Support member 40 is made of, for example, a casting such as aluminum, iron, or magnesium, or a resin, and is formed to have a rigidity higher than that of bottom wall 32, front wall 34A, and rear wall 34B of electrical component case 30.

[0029] In addition, in this embodiment, as shown in FIG. 1, the end 49 of the support member 40 on the battery case 20 side is fitted into a fitting portion 60 (described later) provided on the left wall 26A, which is the outer wall of the battery case 20 that corresponds to the support member 40.

[0030] As described above, the fitting portion 60 is provided on the left wall 26A of the battery case 20. The left wall 26A is provided with ribs to prevent deformation, increase strength, and improve the flow of molten metal, and the fitting portion 60 is constituted by these ribs. In this embodiment, the ribs are formed in a shape that allows them to fit with at least a portion of the support member 40. Specifically, as shown in FIG. 3 , the fitting portion 60 includes first ribs 62 that extend vertically inward from the front wall 24A and the rear wall 24B of the battery case 20. The fitting portion 60 also includes second ribs 63 that extend vertically downward from the ends of each first rib 62. The fitting portion 60 also includes a third rib 64 that connects the lower ends of the two second ribs 63. The two first ribs 62, the two second ribs 63, and the third rib 64 constitute an upper rib 60A that is formed in an inverted hat shape similar to that of the support member 40.

[0031] The fitting portion 60 also includes a lower rib 60B spaced below the upper rib 60A and formed in substantially the same inverted hat shape as the upper rib 60A. The lower rib 60B includes two fourth ribs 65 extending vertically inward from the front wall 24A and rear wall 24B of the battery case 20, and two fifth ribs 66 extending vertically downward from the ends of each fourth rib 65 to the bottom wall 22. In this embodiment, the fitting portion 60 includes a fitting hole 60C formed by a space including a gap between the upper rib 60A and the lower rib 60B, and into which the support member 40 is inserted.

[0032] The fitting portion 60 also includes a sixth rib 67 that extends vertically downward from the lower surface of the center portion of each fourth rib 65 in the vehicle longitudinal direction to the bottom wall 22. As shown in Fig. 3, the sixth rib 67 is provided so as to be positioned outward of the end portion of the mounting portion 42 in the vehicle longitudinal direction when the support member 40 is inserted into the fitting hole 60C. Note that in Fig. 3, the electrical component 14 is shown by a dotted line for ease of understanding, although it does not actually exist in the cross-sectional view taken along line BB in Fig. 1.

[0033] 1, the electrical component 14 is disposed a predetermined distance from the left wall 26A of the battery case 20, and is also disposed a predetermined distance from the left wall 36 of the electrical component case 30. In other words, the electrical component 14 is disposed in approximately the center of the support member 40 in the vehicle width direction.

[0034] In this way, by installing the electrical component 14 a predetermined distance from the left wall 36 of the electrical component case 30, if an impact is applied to the electrical component case 30 from the left side of the vehicle (arrow X in FIG. 1 ), the impact will not be transmitted to the electrical component 14. Furthermore, by separating the electrical component 14 a predetermined distance from the left wall 26A of the battery case 20 and the left wall 36 of the electrical component case 30, space for wiring and assembling the electrical component 14 can be secured.

[0035] Furthermore, in this embodiment, the fitting portion 60 is pre-fitted with the end portion 49 of the support member 40 in the direction in which the battery case 20 and the electrical component 14 are adjacent to each other, i.e., in the vehicle width direction shown in Fig. 1. As a result, when an impact is applied to the peripheral component 70 from the outside, for example, when an impact is applied to the battery pack 10 by the peripheral component 70 from the left side of the vehicle (arrow X in Fig. 1), the fitting portion 60 is fitted even more deeply into the end portion 49.

[0036] That is, as described above, because the support member 40 is fixed to the electric component case 30, when the above-described impact is applied, the support member 40 moves to the right of the vehicle together with the electric component case 30. At this time, because the rigidity of the bottom wall 32, front wall 34A, and rear wall 34B of the electric component case 30 is lower than the rigidity of the support member 40, the support member 40 does not deform, but the electric component case 30 deforms in the vehicle width direction.

[0037] Therefore, by moving the support member 40 toward the right of the vehicle without deformation, the end portion 49 is inserted deeper into the fitting hole 60C. As a result, the end portion 49 is engaged more deeply with the fitting portion 60. As described above, the electric component 14 is installed in approximately the center of the support member 40 in the vehicle width direction, and therefore, when the end portion 49 of the support member 40 is inserted deeply into the fitting hole 60C, the electric component 14 does not abut against the left wall 26A of the battery case 20. In other words, when the end portion 49 of the support member 40 is deeply fitted into the fitting portion 60, the electric component 14 is installed in a position where it does not abut against the left wall 26A of the battery case 20.

[0038] In this embodiment, the rigidity of the battery case 20 and the shape and rigidity of the support member 40 are designed to satisfy the requirements for crushing tests mandated by various standard conditions such as Chinese regulations (GB, GB / T), for example.

[0039] (Effects of this embodiment) Next, the effects of this embodiment will be described.

[0040] In the battery pack 10 of this embodiment, as described above, the left wall 26A, which is an outer wall of the battery case 20 facing the support member 40 that supports the electrical component 14, is provided with a fitting portion 60 that can fit into at least a portion of the support member 40. Therefore, when an impact is applied from the electrical component 14 side, i.e., from the left side of the vehicle (X direction in FIG. 1 ), in the direction in which the battery case 20 and the electrical component 14 are adjacent to each other, the support member 40 fits into the fitting portion 60, thereby suppressing movement of the support member 40 due to tilting, rotation, sliding, etc. This prevents the support member 40 from collapsing, and therefore suppresses an increase in size of the battery pack that would be required to consider the amount of deformation due to the collapse of the support member 40.

[0041] In addition, in the battery pack 10 of this embodiment, the support member 40 includes a mounting portion 42 having a flat surface 40A on which the electrical component 14 is mounted, and a support portion 44 that supports the mounting portion 42. Therefore, the mounting portion 42 on which the electrical component 14 is mounted can be supported by the support portion 44.

[0042] Furthermore, the battery pack 10 of this embodiment includes two vertical portions 46 extending downward from the mounting portions 42 on both sides on which the electrical components 14 are mounted, and a connecting portion 48 connecting the lower ends of the two vertical portions 46. Therefore, the support member 40 is formed into an inverted hat shape by the two mounting portions 42, the two vertical portions 46, and the connecting portion 48, which can provide a structure with increased rigidity. This can prevent the support member 40 from collapsing, allowing the electrical components 14 to be made smaller without having to worry about the electrical components 14 being damaged.

[0043] A conventional battery pack 110 will now be described. In Figures 4 and 5, components similar to those of the present invention are designated by the same reference numerals, and detailed descriptions thereof will be omitted. As shown in Figure 5, in the conventional battery pack 110, the electrical component 14 is fixed to the upper surface of the bottom wall 32 of the electrical component case 30 by, for example, bolting.

[0044] In contrast, in this embodiment, as shown in Fig. 2, the electrical components 14 are fixed to two mounting portions 42 of a support member 40 fixed to the upper surface of the bottom wall 32 of the electrical component case 30. Therefore, if the positional relationship between the electrical components 14 and the battery module 12 in a conventional battery pack 110 when viewed from above as shown in Fig. 4 is the same as that of the battery pack 10 of this embodiment as shown in Fig. 1, the two mounting portions 42 on which the electrical components 14 of the battery pack 10 of this embodiment are mounted are raised in the height direction by the two vertical portions 46, and the distance from the battery is shortened by the raised height. As a result, the wire harness 50 connecting the battery and the electrical components 14 in the battery pack 10 of this embodiment can be made shorter than the wire harness 150 of the conventional battery pack 110.

[0045] Furthermore, in the battery pack 10 of this embodiment, the fitting portion 60 is fitted in advance with the end portion 49 of the support member 40 on the battery case 20 side in the direction in which the battery case 20 and the electrical component 14 are adjacent to each other, i.e., in the vehicle width direction. Therefore, when an impact is applied, the end portion 49 of the support member 40 is further pushed toward the fitting portion 60 while being fitted with the fitting portion 60. As a result, the end portion 49 of the support member 40 is guided by the fitting portion 60 and further fitted deeply into the fitting portion 60, so that the support member 40 and the fitting portion 60 can be properly fitted together when an impact is applied.

[0046] [remarks] In the above embodiment, the fitting portion 60 is fitted with the support member 40, but the present invention is not limited to this. For example, only the support portion 44 may be fitted without the mounting portion 42 being fitted. In this case, the end portion of the mounting portion 42 on the right side of the vehicle is formed to be located further to the left of the end portion of the support portion 44 on the right side of the vehicle. By doing so, only the support portion 44 can be fitted with the fitting portion 60. As a result, the fitting portion 60 is fitted with at least the support portion 44, and movement of at least the support portion 44 due to tilting, rotation, sliding, etc. can be suppressed.

[0047] Furthermore, in the above embodiment, the support member 40 has two vertical portions 46, but the present invention is not limited to this. The support member 40 may have four or more vertical portions 46. For example, a new vertical portion 46 may be added to the outer side of each vertical portion 46 in the vehicle front-rear direction shown in FIG. 2, and the lower end of the added vertical portion 46 with the connecting portion 48 may also be connected. In this case, the shape of the rib of the fitting portion 60 is changed so that the fitting hole 60C is located at a position corresponding to the added vertical portion 46.

[0048] In the above embodiment, the fitting portion 60 is pre-fitted with the end portion 49 of the support member 40 in the direction in which the battery case 20 and the electrical component 14 are adjacent to each other, i.e., in the vehicle width direction shown in Fig. 1 . However, the present invention is not limited to this, and the fitting portion does not have to be pre-fitted. In addition, if the fitting portion is not pre-fitted, for example, a protrusion or the like may be provided on the underside of the connection portion 48 of the support member 40, and a groove may be provided on the upper surface of the bottom wall 32 of the electrical component case 30 to guide the protrusion to the fitting portion 60.

[0049] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment may be appropriately combined with various modified examples, and the present invention may of course be embodied in various forms as long as it does not deviate from the gist of the present invention. [Explanation of symbols]

[0050] 10 Battery pack 12 Battery module (battery) 14 Electrical Components 20 Battery case 26A Left wall (outer wall) 40 Support member 42 Mounting section 44 Support part 46 Vertical section 48 Connection 49 End (battery case side end) 60 Fitting part

Claims

1. a battery case that houses a battery; an electrical component provided adjacent to the battery case and connected to the battery; a support member on which the electrical component is mounted and which supports the electrical component from a lower side in the vehicle vertical direction; a fitting portion provided on an outer wall of the battery case facing the electrical component and the support member in a direction in which the battery case and the electrical component are adjacent to each other, the fitting portion being capable of fitting with at least a part of the support member; A battery pack comprising:

2. 2. The battery pack according to claim 1, wherein the support member comprises: a mounting portion having a flat surface on which the electrical component is mounted; and a support portion extending below the mounting portion and supporting the mounting portion.

3. the mounting portion is provided on each of both sides in a direction perpendicular to the direction in which the battery case and the electrical component are adjacent to each other, 3. The battery pack according to claim 2, wherein the support portion includes two vertical portions extending vertically downward from the mounting portions on both sides, and a connecting portion connecting the lower ends of the two vertical portions together.

4. The battery pack according to claim 2 , wherein the fitting portion is fitted with at least the support portion.

5. 2. The battery pack according to claim 1, wherein the fitting portion is pre-fitted with the battery case side end portion in the adjacent direction of the support member in the adjacent direction of the battery case and the electrical component, and is fitted even more deeply with the battery case side end portion when an impact is applied.

6. a battery case that houses a battery; an electrical component provided adjacent to the battery case and connected to the battery; a support member on which the electrical component is mounted and which supports the electrical component; a fitting portion provided on an outer wall of the battery case facing the support member, the fitting portion being capable of fitting with at least a portion of the support member; In a battery pack comprising: the support member includes a mounting portion having a flat surface on which the electrical component is mounted, and a support portion extending below the mounting portion and supporting the mounting portion, the mounting portion is provided on each of both sides in a direction perpendicular to the direction in which the battery case and the electrical component are adjacent to each other, The support portion of the battery pack includes two vertical portions extending vertically downward from the mounting portions on both sides, and a connecting portion connecting the lower ends of the two vertical portions together.

7. a battery case that houses a battery; an electrical component provided adjacent to the battery case and connected to the battery; a support member on which the electrical component is mounted and which supports the electrical component; a fitting portion provided on an outer wall of the battery case facing the support member, the fitting portion being capable of fitting with at least a portion of the support member; In a battery pack comprising: the support member includes a mounting portion having a flat surface on which the electrical component is mounted, and a support portion extending below the mounting portion and supporting the mounting portion, The fitting portion of the battery pack is fitted with at least the support portion.

8. a battery case that houses a battery; an electrical component provided adjacent to the battery case and connected to the battery; a support member on which the electrical component is mounted and which supports the electrical component; a fitting portion provided on an outer wall of the battery case facing the support member, the fitting portion being capable of fitting with at least a portion of the support member; In a battery pack comprising: The fitting portion is pre-fitted with the battery case side end portion in the adjacent direction of the support member in the adjacent direction of the battery case and the electrical component, and when an impact is applied, the fitting portion fits even more deeply with the battery case side end portion.

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