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 plate body and a plurality of battery packs; the plurality of battery packs are arranged along the second direction, and each battery pack comprises a plurality of battery monomers arranged along the first direction; the plate body comprises a body and a plurality of first protruding parts arranged on one side of the body in the third direction. Along the second direction, the body is arranged between two adjacent batteries, the body comprises a first side wall facing the first convex parts, and the plurality of first convex parts are arranged at intervals along the first direction and are respectively connected with the first side wall; in the first direction, a first glue overflowing groove is defined by every two adjacent first protruding parts and the first side wall, and at least parts of the first glue overflowing grooves and the first protruding parts are arranged between every two adjacent batteries in the second direction. The first glue overflowing groove is used for providing space for overflowing of the structural glue, and the problems that the appearance of the battery pack is poor, the dry and hard structural glue punctures the blue film of the battery monomer and the insulation resistance test is poor are effectively solved.

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] In order to have a longer battery life, a battery pack is usually composed of two or more battery packs. Two adjacent battery packs are usually separated by side panels and bonded together with structural adhesive. In order to ensure the bonding strength, it is usually necessary to ensure a sufficient amount of adhesive. At this time, the structural adhesive is prone to overflow to the upper and lower surfaces of the battery pack, resulting in poor appearance of the battery pack, the blue film of the battery cell is easily punctured by uncleaned adhesive, and poor insulation resistance test. 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 structural adhesive overflowing onto the upper and lower surfaces of the battery pack between existing adjacent 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 plurality of battery packs arranged along the second direction; the battery packs comprising a plurality of battery cells arranged along the first direction;

[0006] A plate body includes a main body and a plurality of first protrusions arranged on one side of the main body along the third direction; along the second direction, the main body is arranged between two adjacent battery groups, the main body includes a first side wall facing the first protrusion, and a plurality of first protrusions are arranged at intervals along the first direction and are respectively connected to the first side wall; along the first direction, two adjacent first protrusions and the first side wall form a first glue overflow groove, and the first glue overflow groove and at least part of the first protrusion are arranged between two adjacent battery groups along the second direction.

[0007] In some embodiments, the main body includes a second side wall arranged opposite to the first side wall along the third direction, the plate body includes a plurality of second protrusions arranged at intervals along the first direction, the plurality of second protrusions are respectively connected to the second side wall, two adjacent second protrusions and the second side wall form a second glue overflow groove, and the second glue overflow groove and at least part of the second protrusion are arranged between two adjacent battery groups along the second direction.

[0008] In some embodiments, it also includes multiple first glue blocking structures, at least two of which are arranged between the main body and the battery pack and are spaced apart along the third direction, and two adjacent first glue blocking structures along the third direction form a glue storage cavity with the main body and the battery pack.

[0009] In some embodiments, multiple second glue blocking structures are also included, at least two of the second glue blocking structures are arranged between the main body and the battery pack and are spaced apart along the first direction; each second glue blocking structure is respectively connected to two adjacent first glue blocking structures, and together with the main body and the battery pack, forms the glue storage cavity.

[0010] In some embodiments, both the first glue blocking structure and the second glue blocking structure are elastic members.

[0011] In some embodiments, the main body includes a third side wall and a fourth side wall relatively arranged along the first direction, and the plate body includes a plurality of third protrusions spaced apart along the third direction and a plurality of fourth protrusions spaced apart along the third direction, the plurality of third protrusions are respectively connected to the third side wall, and the plurality of fourth protrusions are respectively connected to the fourth side wall; two adjacent third protrusions and the third side wall form a third glue overflow groove, and the third glue overflow groove and at least part of the third protrusions are arranged between the two battery groups adjacent to each other along the second direction; two adjacent fourth protrusions and the fourth side wall form a fourth glue overflow groove, and the fourth glue overflow groove and at least part of the fourth protrusions are arranged between the two battery groups adjacent to each other along the second direction.

[0012] In some embodiments, along the second direction, there is a first gap between the first protrusion and the battery pack, there is a second gap between the second protrusion and the battery pack, there is a third gap between the third protrusion and the battery pack, and there is a fourth gap between the fourth protrusion and the battery pack; the first gap is connected to the first glue overflow groove, the second gap is connected to the second glue overflow groove, the third gap is connected to the third glue overflow groove, and the fourth gap is connected to the fourth glue overflow groove.

[0013] In some embodiments, along the third direction, the size of the first protrusion is a mm, the size of the body is b mm, the size of the second protrusion is c mm, and the size of the side wall of the battery pack facing the plate is d mm, satisfying: d≥a+b+c.

[0014] In some embodiments, a sticking surface is provided on a side of the battery cell facing the body, and an orthographic projection of the sticking surface on the body is located within the glue storage cavity.

[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 effects: 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 plate body and a plurality of battery packs; the plurality of battery packs are arranged along the second direction, and the battery pack includes a plurality of battery cells arranged along the first direction; the plate body includes a main body and a plurality of first protrusions arranged on one side of the main body along the third direction. Along the second direction, the main body is arranged between two adjacent battery packs, the main body includes a first side wall facing the first protrusion, and a plurality of first protrusions are arranged at intervals along the first direction and are respectively connected to the first side wall; along the first direction, two adjacent first protrusions and the first side wall form a first glue overflow groove, and the first glue overflow groove and at least part of the first protrusion are arranged between two adjacent battery packs along the second direction. The present application utilizes the first glue overflow groove formed by the main body of the plate and the two adjacent first protrusions to provide space for excess structural glue to overflow when gluing the plate body to the battery pack, thereby preventing excess structural glue from directly overflowing onto the surface of the battery pack, thereby effectively improving the problems of poor appearance of the battery pack, dry structural glue piercing the blue film of the battery cell, and poor insulation resistance test. In addition, the first glue overflow groove is formed by utilizing the two adjacent first protrusions and the first side wall, and there is no need to add additional anti-glue overflow components. The structure is simple, the assembly is simple, the manufacturability is strong, and it helps to reduce the cost of the battery pack and improve the convenience of assembling the battery pack.

[0017] 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 has all the technical features and beneficial effects of the above battery packs, 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 It is a structural schematic diagram of a battery pack and a plate assembly of a battery pack according to an embodiment of the present application;

[0020] Figure 2 is an exploded view of a battery pack and a plate of a battery pack of an embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of the structure in which one side of the board body of the embodiment of the present application is connected to the battery pack;

[0022] Figure 4yes Figure 3 A front view of an embodiment of the present invention;

[0023] Figure 5 yes Figure 4 Enlarged view of part C;

[0024] Figure 6 is a schematic structural diagram of a plate body of an embodiment;

[0025] Figure 7 is a schematic structural diagram of a plate body in another embodiment;

[0026] Figure 8 is a structural schematic diagram of the connection between the plate body and the first adhesive stop structure and the second adhesive stop structure in an embodiment of the present application;

[0027] Fig. 9 is a left side view of a battery pack according to an embodiment of the present application;

[0028] Fig.10 yes Fig. 9 A magnified view of part A;

[0029] Fig.11 yes Fig. 9 A magnified view of part B;

[0030] Fig.12 It is a partially enlarged view of the right side view of the battery pack of the embodiment of the present application.

[0031] Figure numerals: 1, battery pack; 11, battery cell; 111, adhesive surface; 12, first gap; 13, second gap; 14, third gap; 15, fourth gap; 2, plate; 21, main body; 211, first side wall; 212, second side wall; 213, third side wall; 214, fourth side wall; 22, first convex portion; 23, second convex portion; 24, third convex portion; 25, fourth convex portion; 3, first glue overflow groove; 4, second glue overflow groove; 5, first glue blocking structure; 6, glue storage cavity; 7, second glue blocking structure; 8, third glue overflow groove; 9, fourth glue overflow groove; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] It should also be noted that in the drawings of the present application, an arrow labeled X is used to indicate a first direction X, which is also the length direction of the body and is also the direction in which multiple battery cells are arranged in groups. An arrow labeled Y is used to indicate a second direction Y, which is also the direction from the body toward the battery cell. An arrow labeled Z is used to indicate a third direction Z, which is also the height direction of the battery cell. The first direction X, the second direction Y and the third direction Z are introduced to facilitate the description of the structural positional relationship of the various components of the battery pack, thereby facilitating the understanding of its structure.

[0035] The applicant noted that with the rapid development of the battery industry, the structural reliability and installation convenience of the battery pack are particularly important. Usually, multiple battery cells are arranged in sequence to form a battery pack, and at least two battery packs are arranged side by side to form a double-row or multi-row battery pack solution, which aims to improve the battery life of the battery pack. In order to reduce the overall structure of the battery pack and maintain the reliability of the overall structure, an intermediate side panel is usually set between two adjacent battery packs to fix the battery packs on both sides. The intermediate side panel generally bonds the two rows of battery packs together with structural adhesive. In order to meet the bonding strength, it is necessary to ensure that there is enough adhesive. Since there is no corresponding overflow space, when the battery packs on both sides are squeezed toward the intermediate side panel, it is easy for the structural adhesive to overflow to the surface of the battery pack, which can easily cause the appearance of the battery pack to be poor, which is not conducive to the subsequent assembly of structures such as insulating plates. There may also be a situation where the dried structural adhesive pierces the blue film of the battery cell. At the same time, after the blue film is pierced, the insulation of the battery cell is destroyed, and it may also cause poor insulation resistance testing.

[0036] In view of this, the present application provides a battery pack, aiming to solve at least one of the above-mentioned technical problems.

[0037] Please refer to Figure 1-Figure 8 The 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, and comprising a plate 2 and a plurality of battery packs 1; the plurality of battery packs 1 are arranged along the second direction Y, and the battery pack 1 comprises a plurality of battery cells 11 arranged along the first direction X; the plate 2 comprises a body 21 and a plurality of first protrusions 22 arranged on one side of the body 21 along the third direction Z. Along the second direction Y, the body 21 is arranged between two adjacent battery packs 1, the body 21 comprises a first side wall 211 facing the first protrusion 22, and the plurality of first protrusions 22 are arranged at intervals along the first direction X and are respectively connected to the first side wall 211; along the first direction X, two adjacent first protrusions 22 and the first side wall 211 enclose a first glue overflow groove 3, and at least a portion of the first glue overflow groove 3 and the first protrusion 22 are arranged between two adjacent battery packs 1 along the second direction Y.

[0038] The present application utilizes the first glue overflow groove 3 formed by the main body 21 of the plate body 2 and the two adjacent first protrusions 22, which can provide space for the excess structural glue to overflow when gluing the plate body 2 to the battery pack 1, and prevent the excess structural glue from directly overflowing onto the surface of the battery pack 1, thereby effectively improving the problems of poor appearance of the battery pack 1, the dried structural glue piercing the blue film of the battery cell 11, and poor insulation resistance test. In addition, the first glue overflow groove 3 is formed by the two adjacent first protrusions 22 and the first side wall 211, and no additional anti-overflow glue components are required. The structure is simple, the assembly is simple, and the manufacturability is strong, which helps to reduce the cost of the battery pack and improve the convenience of assembling the battery pack.

[0039] Specifically, the multiple battery cells 11 of the embodiment of the present application can usually be arranged into a battery group 1 along a first direction X. The plate body 2 is arranged between two adjacent rows of battery groups 1. The plate body 2 is equivalent to an intermediate side plate and is used to be glued to the side of the battery group 1. The plate body 2 extends along the first direction X. The multiple battery cells 11 are glued by one plate body 2 to achieve fixation and position limitation of the multiple battery cells 11, thereby keeping the positions of the multiple battery cells 11 in the battery pack fixed. The plate body 2 of the embodiment of the present application may include a main body 21 and a plurality of first protrusions 22, wherein the plurality of first protrusions 22 may be understood to include at least two first protrusions 22, and the at least two first protrusions 22 are spaced apart along the first direction X and connected to the first side wall 211 of the main body 21, so as to form at least one first glue overflow groove 3 with the first side wall 211, and each first glue overflow groove 3 can accommodate excess structural glue overflowing from between the battery pack 1 and the plate body 2 when the structural glue is filled between the plate body 2 and the battery pack 1 for bonding, thereby preventing excess structural glue from overflowing to the pole side of the battery pack 1, keeping the appearance of the battery pack 1 neat, reducing or eliminating the cleaning steps, effectively improving the battery pack assembly efficiency, and also improving the qualified rate of the battery pack assembly.

[0040] It should be noted that the first side wall 211 of the embodiment of the present application may not only face the pole side of the battery pack 1 , but also face the bottom of the battery pack 1 , which is not specifically limited in the present embodiment.

[0041] It should also be noted that at least part of the first glue overflow groove 3 of the embodiment of the present application is arranged between two battery packs 1 adjacent to each other along the second direction Y. It can be understood that the first glue overflow groove 3 is a through groove, and the openings at both ends thereof are respectively opposite to the battery pack 1 along the second direction Y. Wherein along the first direction X, the width of the opening of the first glue overflow groove 3 can be less than or equal to the size of the battery cell 11, or can be greater than the size of the battery cell 11, but needs to be smaller than the size of the battery pack 1. According to the different position settings of the first glue overflow groove 3, along the second direction Y, the first glue overflow groove 3 can be partially located between two adjacent battery cells 11, or can be completely located between two adjacent battery cells 11, and one first glue overflow groove 3 can be opposite to multiple battery cells 11 arranged along the first direction X at the same time, and the specific setting can be based on demand. Of course, in order to have sufficient glue overflow space, the larger the width of the first glue overflow groove 3 along the first direction X, the better.

[0042] like Figure 4 , Figure 6-Figure 8As shown, further, in some embodiments, the battery pack has a third direction Z intersecting the first direction X and the second direction Y, the main body 21 includes a second side wall 212 arranged opposite to the first side wall 211 along the third direction Z, the plate body 2 includes a plurality of second protrusions 23 arranged at intervals along the first direction X, the plurality of second protrusions 23 are respectively connected to the second side wall 212, two adjacent second protrusions 23 and the second side wall 212 form a second glue overflow groove 4, and the second glue overflow groove 4 and at least part of the second protrusion 23 are arranged between two adjacent battery groups 1 along the second direction Y.

[0043] In the embodiment of the present application, the second convex portion 23 and the second side wall 212 are provided to enclose the second glue overflow groove 4 , and the second glue overflow groove 4 can continue to provide a glue overflow space for assembling the battery pack 1 , further increasing the space for accommodating the glue overflow.

[0044] It should be noted that the first side wall 211 and the second side wall 212 are arranged opposite to each other along the third direction Z, and the first overflow glue groove 3 formed by the first side wall 211 and the first protrusion 22 and the second overflow glue groove 4 formed by the second side wall 212 and the second protrusion 23 are at least partially arranged opposite to each other or staggered along the third direction Z. In this way, overflow glue space can be formed near the top and bottom surfaces of the battery pack 1, providing more flow possibilities for the excess structural glue between the battery pack 1 and the plate body 2, thereby preventing the structural glue from overflowing to the top surface (pole side) or bottom surface of the battery pack 1.

[0045] It should be clarified that at least part of the second glue overflow groove 4 is arranged between two battery packs 1 adjacent to each other along the second direction Y. At this time, the second glue overflow groove 4 is a through groove extending along the second direction Y, and its two openings opposite to each other along the second direction Y are respectively opposite to the battery packs 1 located on both sides of the second glue overflow groove 4. Wherein, along the first direction X, the width of the opening of the second glue overflow groove 4 can be less than or equal to the size of the battery cell 11, or it can be greater than the size of the battery cell 11, but it needs to be smaller than the size of the battery pack 1. According to the different position settings of the second glue overflow groove 4, along the second direction Y, the second glue overflow groove 4 can be partially located between two adjacent battery cells 11, or it can be completely located between two adjacent battery cells 11, and one second glue overflow groove 4 can be opposite to multiple battery cells 11 arranged along the first direction X at the same time, which can be set according to needs. Of course, in order to have enough glue overflow space, the width of the second glue overflow groove 4 along the first direction X is as large as possible.

[0046] Please refer to Figure 2-Figure 5 , Figure 8-Figure 12 In some embodiments, a plurality of first glue blocking structures 5 are further included, at least two first glue blocking structures 5 are arranged between the main body 21 and the battery pack 1 and are spaced apart along the third direction Z, and two adjacent first glue blocking structures 5 along the third direction Z form a glue storage cavity 6 with the main body 21 and the battery pack 1.

[0047] In the embodiment of the present application, in at least two first glue-blocking structures 5 arranged at intervals on the same side of the body 21 along the third direction Z, two adjacent first glue-blocking structures 5, the body 21 and the battery pack 1 form a glue storage cavity 6, and a sufficient amount of structural glue is contained in the glue storage cavity 6, and then glued to the battery pack 1. The first glue-blocking structure 5 can further play a role in preventing glue from overflowing in the third direction Z, so that the first glue-blocking structure 5 cooperates with the first glue overflow groove 3 and the second glue overflow groove 4 to better prevent excess structural glue from overflowing to the top and bottom surfaces of the battery pack 1.

[0048] Specifically, the structural adhesive in the adhesive storage cavity 6 is respectively bonded to the body 21 and the side wall of the battery pack 1 to ensure the bonding effect between the plate body 2 and the battery pack 1. At the same time, the first adhesive blocking structure 5 is used to block the structural adhesive, which can reduce the overflow of the structural adhesive along the third direction Z. In addition, the first adhesive overflow groove 3 and the second adhesive overflow groove 4 are used to provide an overflow space for the overflowed structural adhesive, so that a two-pronged approach can better prevent the structural adhesive from overflowing to the upper and lower surfaces of the battery pack 1.

[0049] It should be noted that there may be two or more first glue blocking structures 5 located on one side of the body 21. When there are two first glue blocking structures 5, the two first glue blocking structures 5 are spaced apart on the side of the body 21 facing the battery pack 1 and as close to the edge of the body 21 as possible, so as to ensure that the glue storage cavity 6 has a sufficient glue storage volume. Of course, when there are more than two first glue blocking structures 5, there are multiple glue storage cavities 6 along the third direction Z, at which time the structural glue can be separated in the middle, reducing the overflow of the structural glue located in the upper part along the side wall of the battery pack 1 and the body 21 under the action of gravity when the structural glue is not dry, and maintaining the uniformity of the distribution of the structural glue when the body 21 is bonded to the battery pack 1.

[0050] like Figure 8 As shown, further, in some embodiments, a plurality of second glue blocking structures 7 are included, at least two second glue blocking structures 7 are arranged between the main body 21 and the battery pack 1 and are spaced apart along the first direction X; each second glue blocking structure 7 is respectively connected to two adjacent first glue blocking structures 5, and forms a glue storage cavity 6 with the main body 21 and the battery pack 1.

[0051] In the embodiment of the present application, by providing at least two second glue blocking structures 7, the range of the glue storage cavity 6 can be limited along the first direction X, and glue is blocked from the first direction X, effectively preventing the structural glue from overflowing from the first direction X. The second glue blocking structure 7 cooperates with the first glue blocking structure 5, and on the basis of blocking glue along the third direction Z, further blocks glue along the first direction X, thereby achieving a better glue overflow prevention effect.

[0052] It should be noted that since the battery pack 1 is composed of multiple battery cells 11 arranged along the first direction X, the battery cells 11 located in the middle are connected to the adjacent battery cells 11 on both sides along the first direction X. Therefore, the glue overflow along the first direction X only occurs on the outside of the battery cells 11 located at both ends of the battery pack 1 along the first direction X. Therefore, it is preferred to have only two second glue blocking structures 7 for glue blocking.

[0053] In some embodiments, the first adhesive stop structure 5 and the second adhesive stop structure 7 are both elastic members.

[0054] In the embodiment of the present application, the first glue blocking structure 5 and the second glue blocking structure 7 are both configured as elastic parts. At this time, when the battery pack 1 and the plate body 2 are squeezed along the second direction Y to assemble the battery pack, the elastic part can be squeezed and deformed to absorb the tolerance between the plate body 2 and the battery pack 1, thereby ensuring smooth assembly of the battery pack 1.

[0055] Specifically, the first adhesive stop structure 5 and the second adhesive stop structure 7 of the embodiment of the present application can be made of materials such as foam or silicone, which has a certain density to prevent the structural adhesive from overflowing and has a certain deformation ability to absorb dimensional tolerance.

[0056] Please refer to Figure 7 , Figure 10-12 In some embodiments, the main body 21 includes a third side wall 213 and a fourth side wall 214 arranged opposite to each other along the first direction X, the plate body 2 includes a plurality of third protrusions 24 arranged at intervals along the third direction Z and a plurality of fourth protrusions 25 arranged at intervals along the third direction Z, the plurality of third protrusions 24 are respectively connected to the third side wall 213, and the plurality of fourth protrusions 25 are respectively connected to the fourth side wall 214; two adjacent third protrusions 24 and the third side wall 213 form a third glue overflow groove 8, and the third glue overflow groove 8 and at least a portion of the third protrusion 24 are arranged between two battery packs 1 arranged adjacent to each other along the second direction Y; two adjacent fourth protrusions 25 and the fourth side wall 214 form a fourth glue overflow groove 9, and the fourth glue overflow groove 9 and at least a portion of the fourth protrusion 25 are arranged between two battery packs 1 arranged adjacent to each other along the second direction Y.

[0057] In the embodiment of the present application, a plurality of third protrusions 24 and a plurality of fourth protrusions 25 are provided and respectively connected to the main body 21 to form a third glue overflow groove 8 and a fourth glue overflow groove 9. At this time, the third glue overflow groove 8 and the fourth glue overflow groove 9 can accommodate overflowed structural adhesive along the first direction X to prevent the structural adhesive from overflowing to the outer side surfaces of the battery cells 11 located at both ends of the battery pack 1 along the first direction X.

[0058] Please refer to Figure 10-12In some embodiments, along the second direction Y, there is a first gap 12 between the first protrusion 22 and the battery pack 1, there is a second gap 13 between the second protrusion 23 and the battery pack 1, there is a third gap 14 between the third protrusion 24 and the battery pack 1, and there is a fourth gap 15 between the fourth protrusion 25 and the battery pack 1; the first gap 12 is connected to the first glue overflow groove 3, the second gap 13 is connected to the second glue overflow groove 4, the third gap 14 is connected to the third glue overflow groove 8, and the fourth gap 15 is connected to the fourth glue overflow groove 9.

[0059] In the embodiment of the present application, the size of the first protrusion 22, the second protrusion 23, the third protrusion 24 and the fourth protrusion 25 along the second direction Y can be smaller than the main body 21. At this time, when the plate body 2 is connected to the battery pack 1, a gap will be formed between each protrusion and the battery pack 1 along the second direction Y. The first gap 12, the second gap 13, the third gap 14 and the fourth gap 15 can all be used to further accommodate the overflowed structural adhesive and improve the adhesive capacity. At the same time, the first gap 12 can also connect the two adjacent first overflow glue grooves 3. In this way, the first gap 12 can be used to make the structural adhesive in the first overflow glue groove 3 with more structural adhesive flow into the first overflow glue groove 3 with less structural adhesive, further avoiding the structural adhesive from overflowing the upper surface of the battery pack 1. Similarly, the second gap 13 can connect the two adjacent second overflow glue grooves 4, the third gap 14 can connect the adjacent third overflow glue groove 8, and the fourth gap 15 can connect the adjacent fourth overflow glue groove 9. The structural adhesive in the overflow glue groove with more structural adhesive flows into the overflow glue groove with less structural adhesive.

[0060] like Figure 5 As shown, in some embodiments, along the third direction Z, the size of the first protrusion 22 is a mm, the size of the body 21 is b mm, the size of the second protrusion 23 is c mm, and the size of the side wall of the battery pack 1 facing the board body 2 is d mm, satisfying: d≥a+b+c.

[0061] In the embodiment of the present application, by limiting the size of the first protrusion 22, the second protrusion 23 and the main body 21 along the third direction Z to be less than or equal to the size of the side wall of the battery pack 1, it is possible to avoid the first protrusion 22 and the second protrusion 23 protruding respectively on the upper and lower surfaces of the battery pack 1 when the battery pack 1 is stacked and glued and fixed, thereby facilitating the assembly of the battery pack and keeping the battery pack structure compact.

[0062] In some embodiments, a sticking surface 111 is provided on a side of the battery cell 11 facing the body 21 , and an orthographic projection of the sticking surface 111 on the body 21 is located in the glue storage cavity 6 .

[0063] In the embodiment of the present application, the area of ​​the adhesive surface 111 is smaller than the area of ​​the glue storage cavity 6, so that the structural adhesive in the glue storage cavity 6 can completely cover the adhesive surface 111, thereby ensuring the structural effect.

[0064] Accordingly, an electric device described in an embodiment of the present application includes a battery pack as described in any one of the aforementioned embodiments. The electric device can be various types of devices such as new energy vehicles, electric bicycles, backup power supplies, computers, energy storage power supply devices, etc. It is understandable that the electric device has all the technical features and beneficial effects of the aforementioned battery pack, which will not be repeated here.

[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 having a first direction, a second direction and a third direction intersecting each other, characterized in that: include: A plurality of battery packs arranged along the second direction; the battery packs comprising a plurality of battery cells arranged along the first direction; A plate body, comprising a main body and a plurality of first protrusions arranged on one side of the main body along the third direction; along the second direction, the main body is arranged between two adjacent battery packs, the main body comprises a first side wall facing the first protrusion, and the plurality of first protrusions are arranged at intervals along the first direction and are respectively connected to the first side wall; Along the first direction, two adjacent first protrusions and the first side wall form a first glue overflow groove, and the first glue overflow groove and at least a portion of the first protrusion are disposed between two adjacent battery packs along the second direction.

2. The battery pack according to claim 1, characterized in that: The main body includes a second side wall arranged opposite to the first side wall along the third direction, and the plate body includes a plurality of second protrusions arranged at intervals along the first direction, and the plurality of second protrusions are respectively connected to the second side wall, and two adjacent second protrusions and the second side wall form a second glue overflow groove, and the second glue overflow groove and at least part of the second protrusion are arranged between two adjacent battery packs along the second direction.

3. The battery pack according to claim 2, characterized in that: It also includes multiple first glue blocking structures, at least two of which are arranged between the main body and the battery pack and are spaced apart along the third direction, and two adjacent first glue blocking structures along the third direction form a glue storage cavity with the main body and the battery pack.

4. The battery pack according to claim 3, characterized in that: It also includes multiple second glue blocking structures, at least two of which are arranged between the main body and the battery pack and are spaced apart along the first direction; each of the second glue blocking structures is respectively connected to two adjacent first glue blocking structures, and forms the glue storage cavity together with the main body and the battery pack.

5. The battery pack according to claim 4, characterized in that: The first rubber-blocking structure and the second rubber-blocking structure are both elastic members.

6. The battery pack according to claim 2, characterized in that: The main body includes a third side wall and a fourth side wall arranged opposite to each other along the first direction, and the plate body includes a plurality of third protrusions arranged at intervals along the third direction and a plurality of fourth protrusions arranged at intervals along the third direction, the plurality of third protrusions are respectively connected to the third side wall, and the plurality of fourth protrusions are respectively connected to the fourth side wall; two adjacent third protrusions and the third side wall form a third glue overflow groove, and the third glue overflow groove and at least part of the third protrusions are arranged between two adjacent battery groups arranged along the second direction; two adjacent fourth protrusions and the fourth side wall form a fourth glue overflow groove, and the fourth glue overflow groove and at least part of the fourth protrusions are arranged between two adjacent battery groups arranged along the second direction.

7. The battery pack according to claim 6, characterized in that: Along the second direction, there is a first gap between the first protrusion and the battery pack, there is a second gap between the second protrusion and the battery pack, there is a third gap between the third protrusion and the battery pack, and there is a fourth gap between the fourth protrusion and the battery pack; the first gap is connected to the first glue overflow groove, the second gap is connected to the second glue overflow groove, the third gap is connected to the third glue overflow groove, and the fourth gap is connected to the fourth glue overflow groove.

8. The battery pack according to claim 6 or 7, characterized in that: Along the third direction, the size of the first protrusion is a mm, the size of the body is b mm, the size of the second protrusion is c mm, and the size of the side wall of the battery pack facing the plate body is d mm, satisfying: d≥a+b+c.

9. The battery pack according to claim 4 or 5, characterized in that: A sticking surface is provided on one side of the battery cell facing the body, and the orthographic projection of the sticking surface on the body is located in the glue storage cavity.

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

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