Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, the battery pack has a first direction, a second direction and a third direction which are intersected, and the battery pack comprises a battery pack and a plate; the battery pack comprises a plurality of battery monomers arranged along a first direction, the plates comprise a first plate and a second plate connected with the first plate, the first plate is arranged on one side of the battery pack along a second direction and is connected with each battery monomer of the battery pack, and the second plate is arranged on one side of the battery pack along a third direction and is connected with the battery pack; the second plate has a first size D1 along the second direction, and the first size D1 becomes larger and then becomes smaller along the first direction. The first plate is connected to one side of the battery pack, the stability of the battery pack structure is guaranteed, the second plate is connected with the first plate, and the structural strength and the bending resistance of the plate can be effectively improved; in addition, the size of the second plate is firstly increased and then decreased in the second direction, so that the bending resistance of the plate can be further improved at the part with the larger size, and the structural strength of the battery pack is further improved.

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] For the CTP (Cell to Pack) battery pack structure, multiple battery cells are directly assembled into a complete battery pack, and the horizontal and vertical beam structures in the battery box are eliminated, resulting in a decrease in the overall structural strength of the battery pack, thereby reducing the safety performance and service life of the battery pack. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides a battery pack, aiming to solve the problem of reduced overall structural strength of existing battery packs; another purpose of an 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, a second direction and a third direction intersecting each other, including:

[0005] A battery pack, comprising a plurality of battery cells arranged along the first direction;

[0006] A plate member includes a first plate and a second plate connected to the first plate; the first plate is arranged at one side of the battery pack along the second direction and is connected to each of the battery cells in the battery pack; the second plate is arranged at one side of the battery pack along the third direction and is connected to the battery pack, the second plate has a first size D1 along the second direction, and along the first direction, the first size D1 first increases and then decreases.

[0007] In some embodiments, the second plate is connected to each of the battery cells of the battery pack, respectively.

[0008] In some embodiments, along the third direction, the second plate has a first orthographic projection on the battery pack, the first orthographic projection is an axisymmetric figure, and a first symmetry axis of the first orthographic projection extends along the second direction.

[0009] In some embodiments, the second plate has a second dimension D2 along the third direction, and along the first direction, the second dimension D2 first increases and then decreases.

[0010] In some embodiments, along the second direction, the second plate has a second orthographic projection on the plane where the first plate is located, the second orthographic projection is an axisymmetric figure, and a second symmetry axis of the second orthographic projection extends along the third direction.

[0011] In some embodiments, the first plate and the second plate are integrally connected.

[0012] In some embodiments, a plurality of the battery groups are included, and the plurality of the battery groups are spaced apart along the second direction; a first plate is disposed between two adjacent battery groups, and the first plate is respectively connected to the two battery groups; and the second plate is connected to two adjacent battery groups along the third direction.

[0013] In some embodiments, the second plate includes a first connecting portion and a second connecting portion, and the first connecting portion and the second connecting portion are symmetrically arranged on both sides of the first plate along the second direction; along the third direction, the first connecting portion is connected to one of the two adjacent battery groups, and the second connecting portion is connected to the other of the two adjacent battery groups.

[0014] In some embodiments, the plate is an insulating member, or an outer surface of the plate is coated with an insulating layer.

[0015] Accordingly, an electrical device described in an embodiment of the present application includes a battery pack as described in any one of the aforementioned embodiments.

[0016] Beneficial effect: Compared with the prior art, a battery pack according to an embodiment of the present application has a first direction, a second direction and a third direction intersecting each other, and includes a battery pack and a plate. The battery pack includes a plurality of battery cells arranged along the first direction, and the plate includes a first plate and a second plate connected to the first plate. The first plate is arranged on one side of the battery pack along the second direction and connected to each battery cell of the battery pack. The second plate is arranged on one side of the battery pack along the third direction and connected to the battery pack. The second plate has a first dimension D1 along the second direction, and along the first direction, the first dimension D1 increases first and then decreases. The present application ensures the stability of the plurality of battery cells in the battery pack after being arranged and connected by connecting the first plate to one side of the battery pack, and the first plate acts as a crossbeam, which effectively improves the overall structural strength of the battery pack. At the same time, by connecting the second plate to the first plate, the structural strength and anti-bending ability of the plate can be effectively improved, and the overall structural strength of the battery pack can be further improved. In addition, the size of the second plate increases first and then decreases along the second direction, which can effectively improve the anti-bending ability of the plate at a larger size portion, and further improve the structural strength of the battery pack while effectively improving the utilization rate of the plate material.

[0017] Compared with the prior art, an electric device according to 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 according to the embodiment of the present application can have all the technical features and corresponding beneficial effects of the above battery pack, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 is a schematic diagram of the overall structure of a battery pack according to an embodiment of the present application;

[0020] Figure 2 It is a schematic diagram of the overall structure of a panel of an embodiment of the present application;

[0021] Figure 3 is a front view of a panel according to an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of a first orthographic projection of a second plate of a plate member of an embodiment of the present application;

[0023] Figure 5 is a schematic diagram of the overall structure of a panel of a second embodiment of the present application;

[0024] Figure 6 is a front view of a panel according to a second embodiment of the present application;

[0025] Figure 7 is a schematic diagram of a first orthographic projection of a second plate of a plate member of a second embodiment of the present application;

[0026] Figure 8 is a schematic diagram of the overall structure of the panel of the third embodiment of the present application;

[0027] Fig. 9 is a front view of the second plate of the plate member of the third embodiment of the present application;

[0028] Fig.10 is a side view of the second plate of the plate member of the third embodiment of the present application;

[0029] Fig.11 is a schematic diagram of a second orthographic projection of a second plate of a plate member of a third embodiment of the present application;

[0030] Figure numerals: 1, battery pack; 11, battery cell; 2, plate; 21, first plate; 22, second plate; 221, first orthographic projection; 2211, first axis of symmetry; 222, second orthographic projection; 2221, second axis of symmetry; 223, first connecting portion; 224, second connecting portion; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] It should also be noted that in the drawings of the present application, the arrow marked X indicates the first direction X, the arrow marked Y indicates the second direction Y, and the arrow marked Z indicates the third direction Z. In the embodiment of the present application, the first direction X is the direction of arrangement of the multiple battery cells 11 in the battery pack 1, and is also the length direction of the first plate 21; the second direction Y is the thickness direction of the first plate 21, and the third direction Z is the height direction of the first plate 21, that is, the height direction of the battery cell 11; the first direction X, the second direction Y and the third direction Z are introduced to facilitate the description of the structural position relationship of the various components of the battery pack, and thus facilitate the understanding of its structure. In the embodiment of the present application, the first direction X, the second direction Y and the third direction Z are preferably perpendicular to each other.

[0034] In the development of electric vehicle batteries, battery safety and life have always been the focus. However, from an external perspective, more people believe that the safety and life of battery packs are basically problems with battery cells. From an internal perspective, in addition to the problems of the battery cells themselves, the structural strength of the battery pack is also an important point. Structural strength issues can affect the service life of the battery pack at the least, and cause structural damage at the worst, threatening the personal and property safety of the owner. Therefore, structural strength is extremely important. However, in order to increase its volume energy density, current batteries often sacrifice more space in the battery pack to increase the structural strength of the horizontal and longitudinal beams. At this time, the structural strength of the battery pack cannot be effectively guaranteed.

[0035] In view of this, the embodiments of the present application propose a battery pack from the perspective of production installation and the safety of the entire pack life, aiming to solve the above-mentioned problems.

[0036] Please refer to Figure 1-Figure 7 An embodiment of the present application provides a battery pack having a first direction X, a second direction Y and a third direction Z intersecting each other, comprising a battery pack 1 and a plate 2, wherein the battery pack 1 comprises a plurality of battery cells 11 arranged along the first direction X, the plate 2 comprises a first plate 21 and a second plate 22 connected to the first plate 21, the first plate 21 is arranged at one side of the battery pack 1 along the second direction Y and is connected to each battery cell 11 of the battery pack 1, the second plate 22 is arranged at one side of the battery pack 1 along the third direction Z and is connected to the battery pack 1, the second plate 22 has a first size D1 along the second direction Y, and along the first direction X, the first size D1 first increases and then decreases.

[0037] The present application connects the first plate 21 to one side of the battery pack 1 to ensure the stability of the multiple battery cells 11 in the battery pack 1 after arrangement and connection, and the first plate 21 acts as a crossbeam, effectively improving the overall structural strength of the battery pack; at the same time, by connecting the second plate 22 to the first plate 21, the structural strength and bending resistance of the plate 2 can be effectively improved, and the overall structural strength of the battery pack can be further improved; in addition, the size of the second plate 22 first increases and then decreases along the second direction Y, which can effectively improve the bending resistance of the plate 2 at the larger size position, and further improve the structural strength of the battery pack while effectively improving the utilization rate of the material of the plate 2.

[0038] Specifically, in the embodiment of the present application, there may be one or more battery packs: 1, and each battery pack: 1 includes a plurality of battery cells 11 arranged along a first direction X, and adjacent battery cells 11 may be bonded by gluing. The first plate 21 extends along the first direction X, and the first plate 21 is disposed on one side of the battery pack: 1 along the second direction Y and connected to the battery pack: 1, so that the first plate 21 can be connected to the plurality of battery cells 11 respectively along the first direction X, thereby ensuring the structural stability of the battery pack: 1 after the plurality of battery cells 11 are arranged into the battery pack: 1. Preferably, the size of the first plate 21 along the first direction X is not less than the size of the battery pack: 1 along the first direction X, thereby ensuring that the first plate 21 can be connected to each battery cell 11 of the battery pack: 1, further improving the grouping stability of the battery pack: 1, which is equivalent to improving the structural strength of the battery pack: 1.

[0039] Among them, the first plate 21 and the battery cell 11 can be bonded by a thermally conductive structural adhesive, so that when the temperature of a single battery cell 11 rises, it can be quickly transferred to the first plate 21 through the thermally conductive structural adhesive, and then the heat is evenly transferred on the first plate 21, effectively improving the temperature uniformity of the battery pack and reducing the possibility of high local temperature in the battery pack.

[0040] The second plate 22 is connected to the first plate 21, and the second plate 22 is arranged on one side of the battery pack 1 along the third direction Z, wherein the second plate 22 can be arranged on the top surface or the bottom surface of the battery cell 11 along the third direction Z, in this case, it can play a role in enhancing the structural strength and anti-bending ability of the plate body. The second plate 22 is connected to the battery pack 1 along the third direction Z, in this case, it can be connected to the battery pack 1 from both sides of the battery pack 1 and limit the battery cell 11 in the battery pack 1, thereby further improving the stability of the battery pack structure.

[0041] Among them, the second plate 22 and the battery pack: 1 are also connected to the battery cell 11 of the battery pack: 1 through a thermally conductive structural adhesive, so that the temperature of the battery cell 11 can be transferred to the second plate 22 body more quickly, and then to the entire plate 2, further improving the temperature uniformity of the battery pack.

[0042] In the embodiment of the present application, along the first direction X, the first dimension D1 of the second plate 22 along the second direction Y first increases and then decreases. At this time, the local structural strength of the plate 2 can be improved more specifically, and the overall structural strength of the battery pack can be further improved, thereby effectively improving the safety performance and service life of the battery pack.

[0043] Specifically, in the whole battery pack, the large surface of the plate 2 is connected to the battery pack: 1, and the two ends of the plate 2 along the first direction X will be connected to the box of the battery pack, or the two ends of the plate 2 will have end plates or other structures to further package and fix the battery pack: 1. Therefore, the structural strength of the two ends of the relative plate 2 can be strengthened with the help of other structures in the battery pack, or the impact force received by the two ends of the plate 2 can be transmitted to other structures connected to the plate 2, thereby reducing the deformation of the two ends of the plate 2, etc. Therefore, the possibility of deformation of the two ends of the plate 2 along the first direction X is small, and then the demand for structural reinforcement of the two ends of the plate 2 along the first direction X is not high. On the contrary, the middle part of the plate 2 is prone to deformation risk when the battery pack is subjected to external impact or vibration, which causes an impact on the structural stability of the battery pack: 1, and may cause abnormal force on some battery cells 11 in the battery pack: 1, affecting the overall safety and service life of the battery pack. Therefore, the present application can reasonably distribute the material of the second plate 22 by setting the first dimension D1 of the second plate 22 along the first direction Y to increase first and then decrease along the first direction X. Specifically, the middle part of the plate 2 is changeable, and the corresponding second plate 22 is set to increase the first size in the middle from one end, and then gradually decrease from the middle to the other end. In this way, in the changeable area in the middle of the plate 2, by increasing the first size of the second plate 22, it is equivalent to increasing the width of the second plate 22. At this time, it can play a good role in increasing the structural strength of the middle part of the plate 2, and then improve the anti-deformation ability of the plate 2, so as to improve the stability and safety performance of the battery pack structure and ensure the service life of the battery pack. At this time, the width of the second plate 22 can be reasonably distributed, thereby improving the material utilization rate of the plate 2, effectively reducing costs, and affecting the overall volume energy density of the battery pack as little as possible.

[0044] It should be noted that, along the first direction X, the first dimension D1 of the second plate 22 along the second direction Y increases first and then decreases, wherein the position of the maximum value of the first dimension can be reasonably set according to the deformation area of ​​the plate 2 in the battery pack. That is, according to the overall structure of the battery pack, the maximum value of the first dimension can be set in the middle area of ​​the second plate 22 along the first direction X, or close to one end thereof.

[0045] It should also be noted that the first dimension can be linearly or nonlinearly changed, and both can achieve the technical effect of the embodiment of the present application, and the only difference is the degree of improving the structural strength. Therefore, the specific change mode of the first dimension of the second plate 22 first increasing and then decreasing can be reasonably arranged according to the needs. Figure 2-Figure 7 The present application provides two ways of changing the first dimension of the second plate 22, which can be a linear change or a curved change. Figure 2-Figure 7 The illustrated embodiment is an embodiment in which the first dimension is located at the center of the second plate 22 along the second direction Y.

[0046] In some embodiments, the second plate 22 is respectively connected to each battery cell 11 of the battery pack 1 .

[0047] like Figure 1 As shown, in the embodiment of the present application, by providing a second plate 22 connected to each battery cell 11, it is possible to further ensure that each battery cell 11 in the battery pack: 1 can be connected to the plate 2 from two directions, thereby improving the stability of the connection; at the same time, since both side surfaces of the battery cell 11 can be connected to the plate 2 for heat transfer through the thermally conductive structural adhesive, the temperature uniformity of the battery pack can be further improved.

[0048] In some embodiments, along the third direction Z, the second plate 22 has a first orthographic projection 221 on the battery pack 1, the first orthographic projection 221 is an axially symmetrical figure, and the first symmetry axis 2211 of the first orthographic projection 221 extends along the second direction Y.

[0049] like Figure 4 and Figure 7 As shown, in the embodiment of the present application, the orthographic projection of the second plate 22 on the battery pack 1 is a symmetrical figure. At this time, the parts of the second plate 22 on both sides of the first symmetry axis 2211 have the same shape, and the corresponding width change trends are the same, which can play a more uniform structural reinforcement role.

[0050] Please refer to Figure 8-Figure 11 In some embodiments, the second plate 22 has a second dimension D2 along the third direction Z. Along the first direction X, the second dimension D2 first increases and then decreases.

[0051] In the embodiment of the present application, by setting the second dimension of the second plate 22 along the third direction Z, that is, the thickness dimension of the second plate 22 first increases and then decreases, it can be achieved that the thickness in the middle of the second plate 22 along the first direction X is greater than the thickness at both ends. In this way, the structural strength of the middle part of the second plate 22 can be enhanced. At this time, the reasonable distribution of the material of the second plate 22 can be further improved, thereby improving the material utilization rate of the plate 2.

[0052] It should be noted that since inside the battery pack, the middle part of the plate 2 along the first direction X is more likely to be deformed by impact force than the two ends, thickening the middle part of the second plate 22 can further improve the structural strength of the middle part of the second plate 22, thereby improving the bending resistance of the second plate 22, thereby also improving the bending resistance of the plate 2.

[0053] It should also be noted that the specific position of the maximum value of the second dimension of the second plate 22 can be reasonably set according to the needs, so as to achieve a better effect of improving the structural strength and improve the material utilization rate. That is, the end portion with a lower structural strength requirement can be set to a smaller second dimension, and the middle portion with a higher structural strength requirement can be set to a larger second dimension. In other words, the end portion with a lower structural strength requirement can be set to a relatively thin thickness of the second plate 22, and the middle portion with a higher structural strength requirement can be set to a relatively thick thickness of the second plate 22.

[0054] like Fig.11 As shown, in some embodiments, along the second direction Y, the second plate 22 has a second orthographic projection 222 on the plane where the first plate 21 is located, the second orthographic projection 222 is an axially symmetrical figure, and the second symmetry axis 2221 of the second orthographic projection 222 extends along the third direction Z.

[0055] In the embodiment of the present application, the orthographic projection on the plane where the first plate 21 is located is a symmetrical figure. At this time, the parts of the second plate 22 on both sides of the second symmetry axis 2221 have the same shape, and the corresponding thickness change trends are the same, which can achieve a more uniform structural reinforcement effect.

[0056] In some embodiments, the first plate 21 and the second plate 22 are integrally connected.

[0057] In the embodiment of the present application, the first plate 21 and the second plate 22 are connected in an integral manner, which can effectively ensure the connection strength between the first plate 21 and the second plate 22, thereby further improving the structural strength of the plate 2.

[0058] In some embodiments, multiple battery groups: 1 are included, and the multiple battery groups: 1 are arranged at intervals along the second direction Y; a first plate 21 is arranged between two adjacent battery groups: 1, and the first plate 21 is respectively connected to the two battery groups: 1; the second plate 22 is connected to the two adjacent battery groups: 1 along the third direction Z.

[0059] like Figure 1 As shown, in the embodiment of the present application, multiple battery packs: 1 can be arranged in an array, wherein at least two battery packs: 1 are arranged at intervals along the second direction Y, and a plate 2 is arranged between the two battery packs, and the first plate 21 of a plate 2 is respectively bonded to the battery packs: 1 on both sides along the second direction Y using a heat-conductive structural adhesive, and the second plate 22 is respectively connected to the two battery packs: 1 along the third direction Z. At this time, two battery packs: 1 are connected in series using a plate 2 to strengthen the structure of the two battery packs: 1, and at the same time improve the stability of the arrangement and fixation of the two battery packs: 1, effectively improve the structural strength of the battery pack, and ensure the safety performance and service life of the battery pack.

[0060] In addition, one plate 2 connects two battery packs: 1, which can effectively improve the utilization rate of the plate 2, save the internal space of the battery pack, and help improve the volume energy density of the battery pack.

[0061] Please refer to Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 8 and Fig. 9 In some embodiments, the second plate 22 includes a first connecting portion 223 and a second connecting portion 224, and the first connecting portion 223 and the second connecting portion 224 are symmetrically arranged on both sides of the first plate 21 along the second direction Y; along the third direction Z, the first connecting portion 223 is connected to one of the two adjacent battery groups: 1, and the second connecting portion 224 is connected to the other of the two adjacent battery groups: 1.

[0062] In the embodiment of the present application, by setting the first connecting portion 223 and the second connecting portion 224, the second plate 22 can be connected along the third direction Z to the two battery packs 1 located on both sides of the first plate 21 along the second direction Y, thereby improving the structural stability of the connection between the plate 2 and the two battery packs 1.

[0063] In some embodiments, the plate 2 is an insulating member, or the outer surface of the plate 2 is coated with an insulating layer.

[0064] In the embodiment of the present application, by setting the plate 2 as an insulating member or coating the outer surface with an insulating layer, the insulation of the plate 2 can be effectively guaranteed. When the plate 2 is set between the battery pack 1 and connected to the battery cell 11, the short circuit problem between the plate 2 and the outer casing and the pole of the battery cell 11 can be effectively avoided, thereby ensuring the safety performance and service life of the battery pack.

[0065] Accordingly, an electrical device according to an embodiment of the present application includes a battery pack as described in any one of the aforementioned embodiments.

[0066] It can be understood that the electrical device of the embodiment of the present application can have all the technical features and corresponding beneficial effects of the above-mentioned battery pack, which will not be elaborated here.

[0067] It should be noted that the electrical devices referred to in this application may include but are not limited to backup power supplies, electrodes, electric vehicles, electric bicycles, electric motorcycles, large batteries, etc.

[0068] 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.

[0069] 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 intersecting first, second and third directions, including: A battery pack, comprising a plurality of battery cells arranged along the first direction; A plate member includes a first plate and a second plate connected to the first plate; the first plate is arranged at one side of the battery pack along the second direction and is connected to each of the battery cells in the battery pack; the second plate is arranged at one side of the battery pack along the third direction and is connected to the battery pack, the second plate has a first size D1 along the second direction, and along the first direction, the first size D1 first increases and then decreases.

2. The battery pack according to claim 1, characterized in that: The second plate is connected to each of the battery cells of the battery pack.

3. The battery pack according to claim 2, characterized in that: Along the third direction, the second plate has a first orthographic projection on the battery pack, the first orthographic projection is an axisymmetric figure, and a first symmetry axis of the first orthographic projection extends along the second direction.

4. The battery pack according to claim 1, characterized in that: The second plate has a second dimension D2 along the third direction. Along the first direction, the second dimension D2 first increases and then decreases.

5. The battery pack according to claim 4, characterized in that: Along the second direction, the second plate has a second orthographic projection on the plane where the first plate is located, the second orthographic projection is an axisymmetric figure, and a second symmetry axis of the second orthographic projection extends along the third direction.

6. The battery pack according to claim 1, characterized in that: The first plate and the second plate are connected in one piece.

7. The battery pack according to any one of claims 1 to 6, characterized in that: It comprises a plurality of battery packs, which are arranged at intervals along the second direction; a first plate is arranged between two adjacent battery packs, and the first plate is respectively connected to the two battery packs; and the second plate is connected to two adjacent battery packs along the third direction.

8. The battery pack according to claim 7, characterized in that: The second plate includes a first connecting portion and a second connecting portion, and the first connecting portion and the second connecting portion are symmetrically arranged on both sides of the first plate along the second direction; along the third direction, the first connecting portion is connected to one of the two adjacent battery groups, and the second connecting portion is connected to the other of the two adjacent battery groups.

9. The battery pack according to claim 1, characterized in that: The plate member is an insulating member, or the outer surface of the plate member is coated with an insulating layer.

10. An electrical device, characterized in that: Comprising a battery pack as described in any one of claims 1-9.

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