Battery pack and electric device
By using elastic limiting parts on the electrical isolation plate of the battery pack, it deforms when the bus is installed to adapt to the squeeze of the bus, the problem of snap breaking is solved, achieving a more stable assembly process and lower risk of breaking.
Patent Information
- Application Number
- CN202421519590.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-28
Smart Images
Figure CN222883802U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of battery technology, and specifically relates to a battery pack and an electrical device. Background Art
[0002] During the manufacturing process of the battery pack, adjacent battery cells are usually connected by a busbar, which is fixed in the through hole of the electrical isolation plate and fixed by a buckle. During the installation of the busbar, the buckle deforms in the direction away from the through hole to provide installation space for the busbar. However, due to the small cantilever height of the existing buckle, the rigidity is relatively large, and the deformation of the buckle in the direction away from the through hole mainly occurs at the connection between the buckle and the plate body of the electrical isolation plate, so the buckle is prone to breakage. Utility Model Content
[0003] Purpose of the utility model: An embodiment of the present application provides a battery pack, aiming to solve the problem that the existing buckle cantilever has a small height resulting in greater rigidity, and the deformation of the buckle in the direction away from the through hole mainly occurs at the connection between the buckle and the plate body of the electrical isolation plate, so the buckle is prone to breakage; another purpose of the embodiment of the present application is to provide an electrical device.
[0004] Technical solution: A battery pack according to an embodiment of the present application has a first direction, including:
[0005] Battery cells;
[0006] Busbar;
[0007] An electrical isolation plate comprises a main body and an elastic limiter, wherein the main body is arranged on one side of the battery cell along the first direction; the main body is provided with a through hole, the bus is arranged in the through hole and is conductively connected to the battery cell; the through hole has a hole wall, the elastic limiter is connected to the hole wall and extends into the through hole; along the first direction, the elastic limiter is bent toward the battery cell, and at least part of the elastic limiter is arranged on the side of the bus away from the battery cell; wherein, when the bus is installed in the through hole, along the first direction, the elastic limiter can be deformed toward the direction close to the battery cell after being squeezed by the bus, so that the bus is installed in the through hole.
[0008] In some embodiments, the elastic limiting member includes:
[0009] A first arm connected to the hole wall, the first arm extending into the through hole;
[0010] A second arm is connected to a side of the first arm away from the hole wall, and the second arm is bent relative to the first arm toward a direction close to the battery cell;
[0011] Wherein, after being subjected to force along the first direction, the first arm can be deformed in a direction close to the battery cell, and the second arm can be deformed in a direction close to the battery cell and the hole wall.
[0012] In some embodiments, the second arm extends toward the battery cell, and the second arm is bent in an arc shape.
[0013] In some embodiments, the battery pack has a second direction intersecting with the first direction, the body has a groove, the groove passes through the hole wall along the second direction, and the groove is connected to the through hole; the groove has intersecting side walls and a bottom wall, the elastic limiter is connected to the bottom wall, one end of the elastic limiter away from the bottom wall protrudes out of the groove and is located in the through hole, and the elastic limiter is spaced apart from the side wall.
[0014] In some embodiments, the electrical isolation plate includes at least two elastic limiting members, and the at least two elastic limiting members are symmetrically arranged relative to the central axis of the through hole.
[0015] In some embodiments, the electrical isolation plate further includes a support platform, which is disposed at one end of the hole wall close to the battery cell; along the first direction, the busbar is disposed at a side of the support platform away from the battery cell.
[0016] In some embodiments, the electrical isolation plate includes at least two support platforms, and the at least two support platforms are symmetrically arranged relative to the central axis of the through hole.
[0017] In some embodiments, along the first direction, the orthographic projections of the elastic limiting member and the supporting platform on the main body are separated.
[0018] In some embodiments, the electrical isolation plate further includes an anti-fool structure, wherein the anti-fool structure is disposed in the through hole and connected to the hole wall.
[0019] Correspondingly, an electrical device described in an embodiment of the present application includes the battery pack described in any one of the aforementioned embodiments.
[0020] Beneficial effects: Compared with the prior art, a battery pack according to an embodiment of the present application has a first direction, and includes a battery cell, a bus and an electrical isolation plate; the electrical isolation plate includes a body and an elastic stopper, and the body is arranged on one side of the battery cell along the first direction; the body is provided with a through hole, and the bus is arranged in the through hole and is conductively connected to the battery cell; the through hole has a hole wall, and the elastic stopper is connected to the hole wall and extends into the through hole. Along the first direction, the elastic stopper bends toward the battery cell, and at least part of the elastic stopper is arranged on the side of the bus away from the battery cell; wherein, when the bus is installed in the through hole, along the first direction, the elastic stopper can be deformed toward the direction close to the battery cell after being squeezed by the bus, so that the bus is installed in the through hole. The elastic limiter of the present application is bent toward the battery cell along the first direction. When installing the bus, the elastic limiter can be bent and deformed toward the direction close to the battery cell after being squeezed by the bus along the first direction. In this way, when installing the bus, the elastic limiter can continue to deform along the bending direction to achieve the installation of the bus. After the bus is installed in place, the elastic limiter loses pressure and resets, thereby achieving that part of the elastic limiter is located on the side of the bus away from the battery cell and limits the bus in the first direction. At the same time, when the elastic limiter is bent and deformed toward the direction close to the battery cell, the angle between the elastic limiter and the insertion direction of the bus will decrease as the elastic limiter bends, thereby being more conducive to the installation of the bus, effectively reducing the assembly force, and reducing the force on the elastic limiter while reducing the difficulty of assembly, thereby effectively reducing the probability of the elastic limiter breaking.
[0021] Compared with the prior art, an electric device in an embodiment of the present application includes a battery pack as described in any one of the above embodiments. It is understandable that the electric device in an embodiment of the present application includes all the technical features and beneficial effects of the above battery pack, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0023] Figure 1 is a schematic diagram of the overall structure of a battery pack according to an embodiment of the present application;
[0024] Figure 2 It is a schematic diagram of the overall structure of an electrical isolation board according to an embodiment of the present application;
[0025] Figure 3 yes Figure 2 A magnified view of part A;
[0026] Figure 4 is a top view of an electrical isolation plate according to an embodiment of the present application;
[0027] Figure 5 yes Figure 4 Cross-section of the middle AA;
[0028] Figure 6 yes Figure 5 A magnified view of part B;
[0029] Figure 7 yes Figure 4 Cross-section of the middle BB;
[0030] Figure 8 yes Figure 7 Enlarged view of part C;
[0031] Fig. 9 It is a schematic diagram of the extrusion state of a conventional buckle in the prior art;
[0032] Fig.10 It is a schematic diagram of the elastic limiting member in the embodiment of the present application under compression.
[0033] Figure numerals: 1, battery cell; 2, bus; 3, electrical isolation plate; 31, main body; 311, through hole; 3111, hole wall; 3112, center axis; 312, groove; 3121, side wall; 3122, bottom wall; 32, elastic limiter; 321, first arm; 322, second arm; 33, support platform; 34, fool-proof structure; 91, cantilever; 92, limiter; 921, inclined surface; X, first direction; Y, second direction. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0035] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to 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. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined. In the description of this application, "vertical" means completely vertical at 90° or almost completely vertical, for example, an angle within the range of 80° to 100° is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel, for example, an angle within 10° of completely parallel is considered parallel.
[0036] It should also be noted that in the drawings of the present application, arrows marked with X indicate the first direction X, and arrows marked with Y indicate the second direction Y. In the embodiment of the present application, the first direction X is the height direction of the battery pack, and the second direction Y is the arrangement direction of multiple battery cells. The first direction X and the second direction Y are introduced to facilitate the description of the structural position relationship of the various components of the battery pack, thereby facilitating the understanding of its structure.
[0037] In the power battery of the related prior art, during the manufacturing process, the battery cells 1 are usually connected by laser welding of the busbar 2, and the busbar 2 is fixed on the electrical isolation plate 3. In order to facilitate the installation and fixation of the busbar 2, the electrical isolation plate 3 requires a reasonable buckle structure. In this case, the buckle is usually a cantilever buckle, specifically as follows Fig. 9 As shown, the cantilever type buckle includes a cantilever 91 and a limiting portion 92, the cantilever 91 is connected to one side of the body 31 of the electrical isolation plate 3 along the first direction X, and the limiting portion 92 is connected to an end of the cantilever 91 away from the electrical isolation plate 3, wherein the limiting portion 92 has an inclined surface 921, and the inclined surface 921 is subjected to the squeezing force of the bus 2 when the bus 2 is installed, so that the buckle is moved along the second direction Y toward a direction away from the bus 2 (i.e. Fig. 9 Due to the space limitation of the electrical isolation plate 3 in the first direction X, a conventional cantilever clip is used, and the small height of the cantilever 91 leads to a large rigidity, which is not conducive to the installation of the busbar 2 and is prone to breakage of the clip.
[0038] In view of this, the present application provides a battery pack to solve the above problems.
[0039] Please refer to Figure 1-Figure 8 , an embodiment of the present application provides a battery pack, which has a first direction X and includes a battery cell 1, a bus 2 and an electrical isolation plate 3; the electrical isolation plate 3 includes a main body 31 and an elastic limiter 32, the main body 31 is arranged on one side of the battery cell 1 along the first direction X; the main body 31 is provided with a through hole 311, the bus 2 is arranged in the through hole 311 and is conductively connected to the battery cell 1; the through hole 311 has a hole wall 3111, the elastic limiter 32 is connected to the hole wall 3111 and extends into the through hole 311; along the first direction X, the elastic limiter 32 is bent toward the battery cell 1, and at least part of the elastic limiter 32 is arranged on the side of the bus 2 away from the battery cell 1; wherein, when the bus 2 is installed in the through hole 311, along the first direction X, the elastic limiter 32 can be deformed in a direction close to the battery cell 1 after being squeezed by the bus 2, so that the bus 2 is installed in the through hole 311.
[0040] In the embodiment of the present application, the elastic stopper 32 is bent toward the battery cell 1 along the first direction X, and when the bus 2 is installed in the through hole 311, the elastic stopper 32 can be further bent and deformed in the direction close to the battery cell 1 after being squeezed by the bus 2 in the first direction X, so that when the bus 2 is installed, the elastic stopper 32 can continue to deform along the bending direction to achieve the installation of the bus 2. The elastic stopper 32 loses pressure and resets after the bus 2 is installed in place, so that part of the elastic stopper 32 is located on the side of the bus 2 away from the battery cell 1 and the bus 2 is limited in the first direction X. At the same time, when the elastic stopper 32 is bent and deformed in the direction close to the battery cell 1, the angle between the elastic stopper 32 and the insertion direction of the bus 2 will decrease as the elastic stopper bends, so that it is more conducive to the installation of the bus 2, effectively reducing the assembly force, reducing the assembly difficulty and reducing the force on the elastic stopper 32, thereby effectively reducing the probability of the elastic stopper 32 breaking.
[0041] It should be noted that, in the embodiment of the present application, the present application can effectively reduce the space occupied by the bus bar 2 in the first direction X by providing a through hole 311 on the body 31 and using the through hole 311 to accommodate the bus bar 2. At the same time, an elastic stopper 32 is directly provided on the hole wall 3111, and the elastic stopper 32 extends into the through hole 311, so that the space occupied by the elastic stopper 32 in the first direction X can be further reduced.
[0042] like Fig.10As shown, it should also be noted that the elastic limit member 32 in the embodiment of the present application, while extending into the through hole 311, is also bent toward the battery cell 1 along the first direction X. In this way, a bending surface is formed on the side of the elastic limit member 32 facing away from the battery cell 1. The bending surface can be an inclined plane or an arc-shaped surface. At this time, when the bus 2 is installed into the through hole 311 along the first direction X, the bus 2 squeezes the elastic limit member 32 along the first direction X, and its squeezing force mainly acts on the bending surface. At this time, the bending surface can be deformed toward the battery cell 1 under the squeezing of the bus 2, and part of the squeezing force is inclined toward the hole wall 3111. In this way, the bending surface will also be deformed in the direction of the hole wall 3111, so that the abutment interference with the bus 2 in the first direction X can be relieved and the bus 2 can be released, so that the bus 2 can be smoothly installed into the through hole 311. At the same time, after the bus 2 is successfully installed in place, the elastic connector loses the squeezing of the bus 2 and resets, and part of the elastic limiting member 32 is located along the first direction X on the side of the bus 2 away from the battery cell 1, thereby realizing the elastic limiting member 32 limiting the bus 2 in the first direction X.
[0043] Please refer to Figure 3 , Figure 8 and Fig.10 In some embodiments, the elastic limiter 32 includes a first arm 321 and a second arm 322, wherein the first arm 321 is connected to the hole wall 3111 and extends into the through hole 311; the second arm 322 is connected to a side of the first arm 321 away from the hole wall 3111, and the second arm 322 is bent relative to the first arm 321 toward the direction close to the battery cell 1; wherein, after being subjected to force along the first direction X, the first arm 321 can be deformed toward the direction close to the battery cell 1, and the second arm 322 can be deformed toward the direction close to the battery cell 1 and the hole wall 3111.
[0044] In the embodiment of the present application, the first arm 321 is used to support the second arm 322 and keep the second arm 322 away from the hole wall 3111, thereby providing more deformation space for the second arm 322, which is more convenient for installing the busbar 2. The bending deformation of the second arm 322 is used to absorb most of the squeezing force during the installation of the busbar 2, effectively reducing the involvement of the first arm 321, reducing the deformation of the first arm 321, and thus reducing the probability of the elastic limiter 32 breaking.
[0045] Specifically, in the embodiment of the present application, the first arm 321 is connected to the hole wall 3111 and suspended in the through hole 311 , and the second arm 322 is connected to the first arm 321 and suspended in the through hole 311 through the first arm 321 . Fig.10 3 is a specific working state diagram of the elastic limiter 32, wherein direction a is the installation direction of the busbar 2, direction b is the deformation direction of the second arm 322, and direction c is the deformation direction of the first arm 321. Fig.10As shown, when the busbar 2 is installed into the through hole 311 along direction a, the busbar 2 abuts against the second arm 322 and applies pressure to the second arm 322, and the second arm 322 is deformed by the force, wherein the second arm 322 deforms toward the battery cell 1 along the first direction X on the one hand, and deforms toward the hole wall 3111 along the second direction Y on the other hand. Therefore, the deformation direction of the second arm 322 is Fig.10 As shown in the middle direction a. At the same time, when the second arm 322 is subjected to the extrusion force, the second arm 322 transfers a small part of the extrusion force to the first arm 321. The first arm 321 is also pulled by the second arm 322 and deforms to a certain extent along the direction c, which further helps the second arm 322 to achieve a greater displacement. Therefore, when the bus 2 is pressed down and installed along the direction a, the second arm 322 as a whole has a deformation and displacement toward the hole wall 3111 and the battery cell 1, providing an avoidance space for the installation of the bus 2, so that the bus 2 can be smoothly installed into the through hole 311.
[0046] Please refer to Figure 8 and Fig.10 In some embodiments, the second arm 322 extends toward the battery cell 1 , and the second arm 322 is bent in an arc shape.
[0047] In the embodiment of the present application, the second arm 322 is bent in an arc and extends toward the battery cell 1. The second arm 322 arches in the direction away from the battery cell 1. When the bus 2 is installed, the arc surface of the second arm 322 is in linear contact with the bus 2, and the bus 2 slides downward along the arc surface. The contact position changes continuously with the movement of the bus 2 and the deformation of the second arm 322, and the angle α between the installation direction of the bus 2 and the cross-section where the contact position is located gradually decreases, thereby effectively reducing the assembly force and thus effectively reducing the difficulty of assembly. At the same time, the overall force on the elastic limit member 32 is reduced, and the arc bending deformation of the second arm 322 is used to absorb the extrusion force, effectively reducing the force at the connection between the first arm 321 and the hole wall 3111, thereby reducing the probability of the elastic limit member 32 breaking.
[0048] In some embodiments, the battery pack has a second direction Y, the main body 31 has a groove 312, the groove 312 passes through the hole wall 3111 along the second direction Y, and the groove 312 is connected to the through hole 311; the groove 312 has intersecting side walls 3121 and a bottom wall 3122, the elastic limiter 32 is connected to the bottom wall 3122, one end of the elastic limiter 32 away from the bottom wall 3122 protrudes outside the groove 312 and is located in the through hole 311, and the elastic limiter 32 is spaced apart from the side wall 3121.
[0049] In the embodiment of the present application, the groove 312 is provided to provide accommodation space and deformation space for the elastic stopper 32, and at the same time, it also avoids occupying the space in the through hole 311. At this time, only one end of the elastic stopper 32 away from the bottom wall 3122 protrudes outside the groove 312 and is located in the through hole 311. When the bus 2 is installed, the elastic stopper 32 continues to bend and deform into the groove 312, releasing the space in the through hole 311, so that the bus 2 can be smoothly installed in place. After the bus 2 is installed, the elastic stopper 32 is reset and the bus 2 is limited along the first direction X.
[0050] It should be noted that by providing the groove 312 , the through hole 311 can be provided correspondingly according to the shape and size of the bus 2 , and the hole wall 3111 can be used to limit the bus 2 in the circumferential direction, thereby achieving a better limiting effect on the bus 2 .
[0051] In some embodiments, the electrical isolation plate 3 includes at least two elastic limiting members 32 , and the at least two elastic limiting members 32 are symmetrically arranged relative to the central axis 3112 of the through hole 311 .
[0052] In the embodiment of the present application, by providing at least two elastic limiting members 32 symmetrically disposed on the hole wall 3111 of the through hole 311 , multiple limiting points can be provided to achieve more effective limiting of the busbar 2 .
[0053] It should be noted that in the embodiment of the present application, at least two elastic limit members 32 are arranged in a through hole 311. When the bus 2 is installed, it is only necessary to use an automatic installer to grab the bus 2 and transfer it to the top of the through hole 311. At this time, at least two elastic limit members 32 are supported under the bus 2, pressing the bus 2. The bus 2 squeezes at least two elastic limit members 32 at the same time. The elastic limit members 32 are bent toward the battery cell 1 and the hole wall 3111 at the same time to release the space in the through hole 311, so that the bus 2 can be installed in place. Compared with the traditional automatic installer that puts one end of the bus 2 into one side buckle, and then rotates the bus 2 to squeeze the opening on the opposite side, the elastic limit members 32 of the embodiment of the present application can effectively shorten the installation process and installation rhythm by applying a large pressing force to the bus 2 to press the bus 2 into the other buckle, thereby improving production efficiency. At the same time, please refer to Fig. 9 and Fig.10 As the busbar 2 is pressed downward, the buckle of the prior art moves away from the through hole 311 along the second direction Y (i.e. Fig. 9The bus 2 is deformed in the middle direction d), and the angle β between the cross section of the bus 2 and the buckle contact part gradually increases. Correspondingly, a greater pressing force is required to install the bus 2. At this time, not only is the installation difficult, but the buckle is also more likely to break under greater pressure. When the bus 2 is pressed down by the elastic stopper 32 of the embodiment of the present application, the angle α between the cross section of the bus 2 and the elastic stopper 32 contact part gradually decreases, and the corresponding pressing force will also decrease, thereby effectively reducing the force on the elastic stopper 32, thereby reducing the possibility of the elastic stopper 32 breaking.
[0054] In some embodiments, the electrical isolation plate 3 further includes a support platform 33 , which is disposed at one end of the hole wall 3111 close to the battery cell 1 ; along the first direction X, the busbar 2 is disposed on a side of the support platform 33 away from the battery cell 1 .
[0055] In the embodiment of the present application, the support platform 33 is provided to support and limit the busbar 2 from the side of the busbar 2 toward the battery cell 1, thereby preventing the busbar 2 from being pressed down too much and squeezing the battery cell 1 during installation.
[0056] In some embodiments, the electrical isolation plate 3 includes at least two support platforms 33 , and the at least two support platforms 33 are symmetrically arranged relative to the central axis 3112 of the through hole 311 .
[0057] In an embodiment of the present application, there may be multiple independent support platforms 33, and the multiple support platforms 33 are located in the same plane away from the sides of the battery cell 1. This can not only provide a better support and limiting effect, but also effectively reduce the dead weight of the electrical isolation plate 3, thereby helping to reduce the overall weight of the battery pack.
[0058] In some embodiments, along the first direction X, the orthographic projections of the elastic limiting member 32 and the supporting platform 33 on the main body 31 are separated.
[0059] In the embodiment of the present application, the elastic limit member 32 and the support platform 33 are separated in their positive projections on the main body 31, which means that the elastic limit member 32 and the support platform 33 are staggered with each other along the first direction X. At this time, more limiting points can be provided for the bus 2, so that the bus 2 is more stable in the through hole 311, and the bus 2 is prevented from being partially skewed.
[0060] In some embodiments, the electrical isolation plate 3 further includes an anti-fool structure 34 , which is disposed in the through hole 311 , and the anti-fool structure 34 is connected to the hole wall 3111 .
[0061] In the embodiment of the present application, by setting an anti-foolproof structure 34, the corresponding bus 2 is also provided with an anti-foolproof part. The bus 2 can only be installed in place when the anti-foolproof part of the bus 2 cooperates with the anti-foolproof structure 34, which can effectively avoid installation errors of the bus 2.
[0062] Correspondingly, an electrical device according to an embodiment of the present application includes the battery pack of any one of the aforementioned embodiments.
[0063] It can be understood that the electrical device of the embodiment of the present application, including all the technical features and beneficial effects of the above-mentioned battery pack, will not be repeated here.
[0064] Of course, the electrical devices referred to in this application may include but are not limited to backup power supplies, electric vehicles, electric bicycles, electric motorcycles, large batteries, etc.
[0065] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0066] The above is a detailed introduction to a battery pack and an electrical device provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.
Claims
1. A battery pack, characterized in that: Having a first direction, comprising: Battery cells; Busbar; An electrical isolation plate comprises a main body and an elastic limiter, wherein the main body is arranged on one side of the battery cell along the first direction; the main body is provided with a through hole, the bus is arranged in the through hole and is conductively connected to the battery cell; the through hole has a hole wall, the elastic limiter is connected to the hole wall and extends into the through hole; along the first direction, the elastic limiter is bent toward the battery cell, and at least a part of the elastic limiter is arranged on the side of the bus away from the battery cell.
2. The battery pack according to claim 1, characterized in that: The elastic limiting member comprises: A first arm connected to the hole wall, the first arm extending into the through hole; A second arm is connected to a side of the first arm away from the hole wall, and the second arm is bent relative to the first arm toward a direction close to the battery cell; Wherein, after being subjected to force along the first direction, the first arm can be deformed in a direction close to the battery cell, and the second arm can be deformed in a direction close to the battery cell and the hole wall.
3. The battery pack according to claim 2, characterized in that: The second arm extends toward the battery cell and is bent in an arc shape.
4. The battery pack according to claim 1, characterized in that: The battery pack has a second direction intersecting with the first direction, the body has a groove, the groove passes through the hole wall along the second direction, and the groove is connected to the through hole; the groove has intersecting side walls and a bottom wall, the elastic limiter is connected to the bottom wall, one end of the elastic limiter away from the bottom wall protrudes out of the groove and is located in the through hole, and the elastic limiter is spaced apart from the side wall.
5. The battery pack according to claim 1, characterized in that: The electrical isolation plate includes at least two elastic limiting members, and the at least two elastic limiting members are symmetrically arranged relative to the central axis of the through hole.
6. The battery pack according to claim 1, characterized in that: The electrical isolation plate further comprises a support platform, which is arranged at one end of the hole wall close to the battery cell; along the first direction, the busbar is arranged at a side of the support platform away from the battery cell.
7. The battery pack according to claim 6, characterized in that: The electrical isolation plate includes at least two support platforms, and the at least two support platforms are symmetrically arranged relative to the central axis of the through hole.
8. The battery pack according to claim 7, characterized in that: Along the first direction, the orthographic projections of the elastic limiting member and the supporting platform on the main body are separated.
9. The battery pack according to claim 1, characterized in that: The electrical isolation plate also includes an anti-foolproof structure, which is arranged in the through hole and connected to the hole wall.
10. An electrical device, characterized in that: Comprising a battery pack as described in any one of claims 1-9.