Support, battery pack, battery device and electric equipment
By posing convex ribs on the bracket and interfering with the groove wall of the installation groove, the problem of easy shaking of the bracket is solved, improving the stability of the bracket and the safety of the connecting piece.
Patent Information
- Application Number
- CN202420778936.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In the prior art, the bracket needs to reserve a gap for installation on the end plate, resulting in the bracket being prone to shaking and reducing the stability and safety of the connecting piece.
By protruding convex ribs on the outer wall of the bracket body, the convex ribs interfere with the groove wall of the installation groove, ensuring that the bracket is not easy to shake during installation.
It improves the stability of the bracket on the end plate, enhances the stability and safety of the connecting piece, and reduces the instability of the battery device during use.
Smart Images
Figure CN222463322U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of battery devices, and in particular to a bracket, a battery pack, a battery device and an electrical device. Background Art
[0002] The battery device is one of the core components of the vehicle, and the battery device is connected to the external circuit through the connecting piece on the bracket.
[0003] In the prior art, a gap needs to be reserved for the bracket to facilitate installation on the end plate, which causes the bracket to shake easily, thereby reducing the stability and safety of the connecting piece. Utility Model Content
[0004] The purpose of the present application is to provide a bracket, a battery pack, a battery device and an electrical device to solve the problem that the bracket is prone to shaking.
[0005] To achieve the purpose of this application, this application provides the following technical solutions:
[0006] In a first aspect, the present application provides a bracket, which is suitable for being installed in a mounting groove of an end plate. The bracket comprises a bracket body and a convex rib, wherein the convex rib protrudes outwardly on an outer wall of the bracket body, and the convex rib is used for interference fit with the groove wall of the mounting groove.
[0007] In one embodiment, the convex rib extends along the first direction of the bracket body, and the convex rib includes a connected mating section and a guide section, the mating section and the guide section are arranged in sequence in the first direction, and the size of the guide section protruding from the outer wall of the bracket body gradually increases from the end away from the mating section to the end close to the mating section.
[0008] In one embodiment, a first guiding slope is provided on the guiding section, and the first guiding slope extends to the matching section.
[0009] In one embodiment, one end of the bracket body along the first direction is suitable for abutting against a limiting portion of the end plate, and the limiting portion, the guiding section and the matching section are sequentially arranged in the first direction.
[0010] In one embodiment, the bracket body includes a first support segment and a second support segment, the first support segment and the second support segment are spaced apart in a second direction of the bracket body, the second direction is different from the first direction of the bracket body, and a groove is formed in an area between the first support segment and the second support segment;
[0011] The convex rib is arranged on the groove wall of the groove, the groove is used to cooperate with the supporting protrusion in the installation groove, and the convex rib is used to have an interference fit with the supporting protrusion.
[0012] In one embodiment, the convex rib includes a first convex rib and a second convex rib, and the first convex rib and the second convex rib are respectively arranged on the outer walls of the bracket body on both sides in a third direction thereof, and the third direction is different from the first direction of the bracket body.
[0013] In a second aspect, the present application further provides a battery pack, comprising an end plate and the bracket as described above, wherein the end plate is provided with a mounting groove, and the convex rib is interference fit with the groove wall of the mounting groove.
[0014] In one embodiment, the bracket body includes a first support segment and a second support segment, the first support segment and the second support segment are arranged at intervals in a second direction of the bracket body, the second direction is different from the first direction of the bracket body, the area between the first support segment and the second support segment forms a groove, and the convex rib is arranged on the groove wall of the groove;
[0015] A supporting protrusion is convexly provided on the groove wall of the installation groove, the supporting protrusion is matched with the groove, and the convex rib is interference-fitted with the supporting protrusion.
[0016] In one embodiment, the mounting groove further includes a bottom wall, the second support section is located between the bottom wall and the support protrusion, a receiving cavity is recessed on the bottom wall, a card block is protruding along the second direction on the outer wall of the bracket body, and the card block is inserted into the receiving cavity.
[0017] In one embodiment, the distance between the outer wall of the bracket connected to one side of the block and the bottom wall of the mounting groove in the second direction is a, the length of the block in the second direction is b, and a / b is in the range of 0.88-0.94.
[0018] In one embodiment, the blocking block includes a first side wall and a second side wall sequentially arranged along a first direction, and the second side wall is provided with a second guiding inclined surface inclined toward the first side wall along a second direction.
[0019] In one embodiment, there is a distance between the first side wall and the inner wall of the accommodating cavity in the first direction.
[0020] In a third aspect, the present application further provides a battery device, comprising a conductive sheet and the battery pack as described above, wherein the conductive sheet is connected to the bracket.
[0021] In a fourth aspect, the present application also provides an electrical equipment, comprising the battery pack as described above or the battery device as described above.
[0022] In the present application, convex ribs are provided on the outer wall of the bracket body, and the convex ribs are provided on part of the outer wall of the bracket body. When the bracket cooperates with the mounting groove of the end plate, the convex ribs are interference fit with the groove wall of the mounting groove, so that the bracket is not easy to shake, thereby improving the stability of the bracket installed on the end plate, and then improving the stability and safety of the connecting plate on the bracket. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0024] Figure 1 A three-dimensional diagram of a battery device according to an embodiment of the present application;
[0025] Figure 2 for Figure 1 Exploded diagram of
[0026] Figure 3 A three-dimensional diagram of an end plate and a bracket according to an embodiment of the present application;
[0027] Figure 4 for Figure 3 Exploded diagram of
[0028] Figure 5 Based Figure 3 Rear view of
[0029] Figure 6 A three-dimensional diagram of an end plate according to an embodiment of the present application;
[0030] Figure 7 A three-dimensional diagram of a bracket according to an embodiment of the present application;
[0031] Figure 8 for Figure 7 Left view of;
[0032] Fig. 9 for Figure 7 A stereogram from another perspective;
[0033] Fig.10 for Figure 5 AA section view.
[0034] Description of reference numerals:
[0035] 100, battery cell; 200, conductive sheet; 300, end plate; 310, mounting groove; 310a, supporting protrusion; 311, first groove wall; 312, second groove wall; 313, bottom wall; 320, limiting portion; 330, accommodating cavity; 400, bracket; 410, bracket body; 411, first supporting section; 411a, first outer wall; 411b, second outer wall; 412, groove; 413, second supporting section; 413a, third outer wall; 413b, fourth outer wall; 420, convex rib; 421, matching section; 422, guide section; 422a, first guide slope; 430, block; 431, first side wall; 432, second side wall; 433, second guide slope; 500, insulating sheet. DETAILED DESCRIPTION
[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.
[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.
[0039] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0040] The embodiment of the present application provides an electric device, which includes a battery device, and the battery device supplies power to the electric device to drive the electric device to work. The electric device includes a vehicle, a drone, and an unmanned underwater vehicle. In the vehicle, the vehicle includes a frame and a battery device, and the battery device is installed on the frame. The battery device can provide power to the vehicle to drive the vehicle. The vehicle can be an electric car, a hybrid car, or a motorhome. In the embodiment of the present application, the battery device is used in an electric car as an example for explanation.
[0041] refer to Figure 1 and Figure 2 , Figure 1 This is a three-dimensional diagram of a battery device according to an embodiment of the present application. Figure 2 for Figure 1 Exploded diagram. An embodiment of the present application provides a battery device, which includes a plurality of battery packs, each of which includes a battery cell 100, a conductive sheet 200 and a bracket 400, wherein the conductive sheet 200 is mounted on the bracket 400, and one end of the conductive sheet 200 is connected to the battery cell 100 to connect the battery cell 100 to an external circuit, or a plurality of battery packs are electrically connected through the conductive sheet 200. The battery pack also includes a frame and an insulating sheet 500, wherein the internal space of the frame is used to accommodate the battery cell 100, and the frame includes a pair of end plates and a pair of side plates arranged around the battery cell 100, which provide support for the battery cell 100 and can prevent the battery cell 100 from expanding and deforming, and the frame is made of metal parts to meet the strength requirements of the battery pack, and the bracket 400 is arranged on the frame to lead out the high and low voltages of the battery pack.
[0042] In the prior art, a gap needs to be reserved for the bracket to facilitate installation on the end plate, which causes the bracket to shake easily, thereby reducing the stability and safety of the conductive sheet.
[0043] refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , Figure 3 This is a three-dimensional diagram of an end plate and a bracket according to an embodiment of the present application. Figure 4 for Figure 3 Exploded diagram of Figure 5 Based Figure 3 The rear view of Figure 6 This is a three-dimensional diagram of an end plate according to an embodiment of the present application. Figure 7The present application provides a three-dimensional diagram of a bracket according to an embodiment of the present application. The present application provides a bracket 400, which is installed in a mounting groove 310. The bracket 400 includes a bracket body 410 and a convex rib 420. The bracket 400 is suitable for cooperating with an end plate 300. The end plate 300 is a portion of the battery pack frame surrounding the battery cell 100. The end plate 300 is provided with a mounting groove 310, and the bracket 400 is installed in the mounting groove 310. When the bracket 400 cooperates with the mounting groove 310, there is a gap between the outer wall of the bracket body 410 and the groove wall of the mounting groove 310, and the convex rib 420 is protruded outwardly on the outer wall of the bracket body 410, and the convex rib 420 is interference fit with the groove wall of the mounting groove 310. The bracket 400 provided in the embodiment of the present application sets a gap between the outer wall of the bracket body 410 and the groove wall of the mounting groove 310, so that the bracket 400 can be smoothly inserted into the mounting groove 310 on the end plate 300, which is convenient for the assembly of the bracket 400 and the end plate 300, and by protruding ribs 420 protruding outwards on the outer wall of the bracket body 410, the ribs 420 are protruding on part of the outer wall of the bracket body 410, and the ribs 420 are interference fit with the groove wall of the mounting groove 310, while facilitating the assembly of the bracket and the end plate, the stability of the bracket 400 installed on the end plate 300 is improved, and the installation accuracy of the bracket 400 is ensured. Thereby, the force on the conductive sheet 200 caused by the shaking of the bracket 400 during the use of the battery device is reduced, and the product reliability is improved.
[0044] Specifically, the battery pack can be but is not limited to a lithium battery. The end plate 300 is a metal part to improve the supporting strength of the battery cell 100 in the battery pack. The bracket 400 is an insulating part made of insulating material, so that the bracket 400 can support the conductive sheet 200 while achieving insulation from the end plate 300. The conductive sheet 200 is mounted on the bracket 400 to avoid electrical connection between the bracket 400 and the end plate 300, thereby ensuring the reliability of the battery pack.
[0045] The material of the bracket 400 can be one of ABS (acrylonitrile-butadiene-styrene copolymer), PPO (polyphenylene ether), and PPE (polypropylene), and the rib 420 is elastic so that the rib 420 is interference fit with the groove wall of the installation groove 310.
[0046] In one embodiment, the width direction of the bracket body 410 is the first direction, defined as the X direction; the height direction of the bracket body 410 is the second direction, defined as the Z direction; and the length direction of the bracket body 410 is the third direction, defined as the Y direction.
[0047] The convex rib 420 extends along the first direction X of the bracket body 410, and the size of the convex rib 420 in the first direction X may be less than or equal to the size of the bracket body 410 in the first direction X. The convex rib 420 includes a connected matching segment 421 and a guide segment 422, which are sequentially arranged in the first direction X, and the size of the guide segment 422 protruding from the outer wall of the bracket body 410 gradually increases from the end away from the matching segment 421 to the end close to the matching segment 421, so as to facilitate the assembly of the bracket 400 and the end plate 300.
[0048] The cross section of the matching section 421 perpendicular to the X direction may be a square, a semicircular, or other shapes, without limitation. The convex rib 420 passes through the matching section 421 to have an interference fit with the groove wall of the mounting groove 310. After the bracket 400 is assembled on the end plate 300, the friction between the convex rib 420 and the groove wall of the mounting groove 310 restricts the bracket 400 in both the Y direction and the Z direction, thereby improving the installation stability of the bracket 400. At the same time, a guide section 422 is provided at one end of the mating section 421, and the guide section 422 provides guidance when assembling the bracket 400, so as to facilitate the insertion of the bracket 400 into the mounting groove 310; preferably, a first guide bevel 422a is provided on the guide section 422, and the first guide bevel 422a extends to the mating section 421. Specifically, the first guide bevel 422a can be connected to the outer wall of the bracket body 410 and the outer wall of the mating section 421, so that the interference fit between the rib 420 and the groove wall of the mounting groove 310 is gradually increased, and the gap between the rib 420 and the groove wall of the mounting groove 310 is gradually reduced while facilitating the insertion of the bracket 400 into the mounting groove 310, thereby improving the installation stability of the bracket 400.
[0049] In one embodiment, a limiting portion 320 is provided on the end plate 300, and the limiting portion 320 is a groove wall at one end of the mounting groove 310 in the first direction X, and one end of the bracket body 410 along the first direction X is abutted against the limiting portion 320. The limiting portion 320, the guide section 422 and the matching section 421 are sequentially arranged in the first direction X, that is, the guide section 422 is arranged at one end of the matching section 421 close to the limiting portion 320, so that the bracket 400 is inserted into the mounting groove 310 along the first direction X. When the bracket 400 is inserted into the mounting groove 310, the bracket 400 is abutted by the limiting portion 320 on the end plate 300 to limit the installation position of the bracket 400. Specifically, the limiting portion 320 is arranged on a side of the end plate 300 away from the battery cell 100. After the bracket 400 is installed on the end plate 300, the insulating sheet 500 is supported on the end plate 300 and the battery cell 100 is installed, so that the bracket 400 is restricted between the limiting portion 320 and the insulating sheet, thereby achieving the limitation of the bracket 400 in the X direction, thereby further improving the stability of the installation of the bracket 400.
[0050] refer to Figure 6 , Figure 7 and Figure 8 , Figure 8 for Figure 7 The bracket body 410 includes a first support segment 411 and a second support segment 413, which are spaced apart in the second direction Z of the bracket body 410, and a groove 412 is formed in the area between the first support segment 411 and the second support segment 413. The rib 420 is provided on the groove wall of the groove 412, and the rib 420 is located between the first support segment 411 and the second support segment 413, and the size of the rib 420 in the second direction Z is smaller than the distance between the first support segment 411 and the second support segment 413. Specifically, a support protrusion 310a is convexly provided on the groove wall of the mounting groove 310, and the support protrusion 310a cooperates with the groove 412 to fix the bracket 400 in the mounting groove 310, and the rib 420 and the support protrusion 310a are interference fit.
[0051] In the embodiment of the present application, the mounting groove 310 includes a first groove wall 311 and a second groove wall 312. The first groove wall 311 is arranged on the supporting protrusion 310a. The first groove wall 311 protrudes from the second groove wall 312. The first groove wall 311 is arranged between the first supporting section 411 and the second supporting section 413. The rib 420 is interference fit with the first groove wall 311. The second supporting section 413 and the second groove wall 312 have a gap to facilitate the insertion of the bracket 400 into the mounting groove 310.
[0052] The first support section 411 includes a first outer wall 411a and a second outer wall 411b, and the second support section 413 includes a third outer wall 413a and a fourth outer wall 413b. The groove 412 is recessed in the first outer wall 411a or the third outer wall 413a. The area between the second outer wall 411b and the fourth outer wall 413b forms the groove 412. The groove 412 is matched with the groove wall of the mounting groove 310 so that the bracket 400 is clamped on the end plate 300. There is a gap between the third outer wall 413a and the second groove wall 312, and the rib 420 is interference-fitted with the first groove wall 311. The length of the rib 420 in the second direction Z is less than the distance between the second outer wall 411b and the fourth outer wall 413b, so that the interference-fit area between the bracket 400 and the groove wall of the mounting groove 310 is small, which facilitates the insertion of the bracket 400 into the mounting groove 310 of the end plate 300 and improves the stability of the installation of the bracket 400.
[0053] Optionally, the convex rib 420 can be arranged on the second outer wall 411b, in which case the first groove wall 311 and / or the second groove wall 312 of the mounting groove 310 have a gap with the bracket body 410; or the convex rib 420 is arranged on the third outer wall 413a, in which case the first groove wall 311 of the mounting groove 310 has a gap with the bracket body 410; or the convex rib 420 is arranged on the fourth outer wall 413b, in which case the first groove wall 311 and the second groove wall 312 of the mounting groove 310 have a gap with the bracket body 410, both of which can improve the stability of the installation of the bracket 400 while facilitating the assembly of the bracket 400 and the end plate 300.
[0054] In one embodiment, the bracket 400 is symmetrically arranged, and the convex rib 420 includes a first convex rib and a second convex rib, and the first convex rib and the second convex rib are respectively arranged on the outer walls of both sides of the bracket body 410 in the third direction Y thereof to further improve the installation stability of the bracket 400.
[0055] refer to Figure 4 , Figure 6 , Fig. 9 and Fig.10 , Fig. 9 for Figure 7 A stereogram from another perspective, Fig.10 for Figure 5 AA cross-sectional view. The mounting groove 310 also includes a bottom wall 313, which is connected to the second groove wall 312. The second support section 413 is located between the bottom wall 313 and the support protrusion 310a. The bottom wall 313 is recessed with a receiving cavity 330. A card block 430 is protruded along the second direction on the outer wall of the bracket body 410, and the card block 430 is inserted into the receiving cavity 330. Specifically, the card block 430 is arranged at one end of the bracket body 410 away from the guide section 422. The arrangement of the card block 430 on the bracket body 410 can install the bracket 400 on the end plate 300 in advance, and then install the insulating sheet 500 and the battery cell 100 in sequence to hold the bracket 400, improve the integration of the module frame during stacking, and prevent the bracket 400 from falling off the end plate 300. After the bracket 400 is assembled in place, a "click" sound will be emitted, thereby effectively judging whether the bracket 400 is in place, thereby improving the recognition during assembly.
[0056] In one embodiment, the distance between the outer wall of the bracket 400 connected to the clamping block 430 and the bottom wall 313 of the mounting groove 310 in the second direction Z is a, the length of the clamping block 430 in the second direction Z is b, and a / b is in the range of 0.88-0.94, so that the clamping block 430 can be inserted into the accommodating cavity 330 of the end plate 300, and ensure that the bracket 400 is not easy to slide off after being clamped on the end plate 300. Among them, a / b can be 0.88, 0.89, 0.9, 0.91, 0.93, 0.94, etc., without specific limitation.
[0057] In one embodiment, the block 430 includes a first side wall 431 and a second side wall 432 sequentially arranged along a first direction, and a second guide slope 433 inclined toward the first side wall 431 along a second direction is provided on the second side wall 432. Specifically, the second guide slope 433 is arranged so as to facilitate the block 430 to be inserted into the receiving cavity 330 of the end plate 300. Preferably, the angle d between the second guide slope 433 and the first side wall 431 is in the range of 15 degrees to 60 degrees, and within this angle range, the block 430 can be smoothly inserted into the receiving cavity 330 of the end plate 300.
[0058] In one embodiment, the first side wall 431 and the inner wall of the accommodating cavity 330 have a spacing c in the first direction, and c / b is in the range of 0.08-0.14. The setting of the spacing c in this range enables the block 430 to restore to its original shape due to its own elasticity after being inserted into the accommodating cavity 330 of the end plate 300, thereby providing sufficient space for the block 430 to recover and reducing the gap between the block 430 and the inner wall of the accommodating cavity 330, thereby limiting the movable space of the bracket 400 when it is connected to the end plate 300.
[0059] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0060] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.
Claims
1. A bracket, characterized in that: The bracket is suitable for being installed in the installation groove of the end plate. The bracket comprises a bracket body and a convex rib. The convex rib is protruding outwardly on the outer wall of the bracket body. The convex rib is used for interference fit with the groove wall of the installation groove.
2. The bracket according to claim 1, characterized in that: The convex rib extends along the first direction of the bracket body, and the convex rib includes a connected matching section and a guide section, the matching section and the guide section are arranged in sequence in the first direction, and the size of the guide section protruding from the outer wall of the bracket body gradually increases from the end away from the matching section to the end close to the matching section.
3. The bracket according to claim 2, characterized in that: The guide section is provided with a first guide slope, and the first guide slope extends to the matching section.
4. The bracket according to claim 2 or 3, characterized in that: One end of the bracket body along the first direction is suitable for abutting against the limiting portion of the end plate, and the limiting portion, the guiding section and the matching section are arranged in sequence in the first direction.
5. The bracket according to claim 1, characterized in that: The bracket body comprises a first support segment and a second support segment, the first support segment and the second support segment are arranged at intervals in a second direction of the bracket body, the second direction is different from the first direction of the bracket body, and a groove is formed in an area between the first support segment and the second support segment; The convex rib is arranged on the groove wall of the groove, the groove is used to cooperate with the supporting protrusion in the installation groove, and the convex rib is used to have an interference fit with the supporting protrusion.
6. The bracket according to claim 1, characterized in that: The convex ribs include a first convex rib and a second convex rib, wherein the first convex rib and the second convex rib are respectively arranged on two side outer walls of the bracket body in a third direction thereof, and the third direction is different from the first direction of the bracket body.
7. A battery pack, characterized in that: It comprises an end plate and a bracket as claimed in any one of claims 1 to 6, wherein the end plate is provided with a mounting groove, and the convex rib is interference fit with the groove wall of the mounting groove.
8. The battery pack according to claim 7, characterized in that: The bracket body comprises a first support segment and a second support segment, the first support segment and the second support segment are arranged at intervals in a second direction of the bracket body, the second direction is different from the first direction of the bracket body, a groove is formed in the area between the first support segment and the second support segment, and the convex rib is arranged on the groove wall of the groove; A supporting protrusion is convexly provided on the groove wall of the installation groove, the supporting protrusion is matched with the groove, and the convex rib is interference-fitted with the supporting protrusion.
9. The battery pack according to claim 8, characterized in that: The mounting groove also includes a bottom wall, the second supporting section is located between the bottom wall and the supporting protrusion, a receiving cavity is recessed on the bottom wall, a card block is protruded along the second direction on the outer wall of the bracket body, and the card block is inserted into the receiving cavity.
10. The battery pack according to claim 9, characterized in that: The distance between the outer wall of the bracket connected to the block on one side and the bottom wall of the mounting groove in the second direction is a, the length of the block in the second direction is b, and a / b is in the range of 0.88-0.
94.
11. The battery pack according to claim 9, characterized in that: The block comprises a first side wall and a second side wall arranged in sequence along a first direction, and the second side wall is provided with a second guiding inclined surface inclined toward the first side wall along a second direction.
12. The battery pack according to claim 11, characterized in that: The first side wall is spaced apart from the inner wall of the accommodating cavity in the first direction.
13. A battery device, characterized in that: It comprises a conductive sheet and a battery pack as described in any one of claims 7 to 12, wherein the conductive sheet is connected to the bracket.
14. An electrical device, characterized in that: Comprising the battery pack according to any one of claims 7 to 12 or the battery device according to claim 13.