Battery and battery module

Abstract

The battery comprises a cover plate and a shell, the shell is covered with the cover plate, and lower plastic cement is arranged on the inner side of the cover plate; the pole group is provided with a pole lug; the support is provided with a containing groove which is opened towards one side of the cover plate, the support and the lower plastic are buckled and positioned, the open end of the containing groove abuts against the inner surface of the cover plate, and the support is provided with an avoiding groove which is used for the pole lug to penetrate through and is connected with the pole group. According to the invention, the support and the lower plastic are installed and matched in a buckling matching mode, a clamping structure does not need to be formed, the difficulty of the pole group, the support and other components entering the shell is reduced, the assembly efficiency is improved, the assembly reliability between the support and the lower plastic can be ensured, and the avoiding groove suitable for avoiding the pole lug is formed in the support, so that the assembly reliability is improved. Therefore, the support is prevented from interfering with the tabs, and the tabs can be conveniently connected and matched with the electric connection ends on the cover plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery and a battery module. BACKGROUND

[0002] At present, batteries are applied more and more in various fields of life.

[0003] In the related art, the battery usually adopts a support and a lower plastic jointing mode to fix the tab, so that the jointing structure is damaged when entering the shell, which affects the assembly of the battery cell into the shell, and the jointing installation mode needs a large assembly space to reserve the design of the jointing structure, which affects the energy density of the battery. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a battery with simple assembly and high reliability.

[0005] According to the battery of the first aspect of the present application, the battery comprises a cover plate and a shell, the cover plate is arranged on the shell, and the inner side of the cover plate is provided with a lower plastic; a pole group, the pole group is formed with a tab; a support, the support is formed with an accommodating groove which is open to one side of the cover plate, the support is positioned by being buckled with the lower plastic, and the open end of the accommodating groove abuts against the inner surface of the cover plate, the support is formed with an avoiding groove for the tab to pass through and is connected with the pole group.

[0006] In the present application, the support is installed and cooperated with the lower plastic in a buckling mode, without forming a jointing structure, which reduces the difficulty of the pole group and the support into the shell, improves the assembly efficiency, and can ensure the assembly reliability between the support and the lower plastic, and the avoiding groove is formed at the support to avoid the interference between the support and the tab, which facilitates the connection and cooperation between the tab and the electrical connection end on the cover plate. At the same time, compared with the prior art, the setting of the jointing structure is saved, so that the space utilization rate of the battery in the shell can be improved, which helps to improve the energy density of the battery.

[0007] According to some embodiments of the present application, the support comprises a support body, the side of the support body away from the cover plate is formed with the avoiding groove; a support edge is arranged on the side of the support body close to the cover plate, the support edge extends from the support body to the side of the cover plate and is abutted and cooperated with the cover plate, the support edge extends along the circumferential direction of the support body and is adapted to be arranged around the lower plastic.

[0008] According to some embodiments of the present application, the height of the support edge protruding from the support body is L, and the relationship L≥0.5mm is satisfied.

[0009] According to some embodiments of this application, the main body of the bracket is provided with an insulating support plate, the insulating support plate is disposed opposite to the cover plate, and the surface of the insulating support plate opposite to the cover plate is lower than the support edge and is used to support the electrode tab.

[0010] According to some embodiments of this application, the support body includes a first support and a second support, the first support and the second support are arranged and connected along a first direction, and the clearance groove is formed between the first support and the second support.

[0011] According to some embodiments of this application, the first bracket includes two first fixed seats arranged at a distance along a second direction, and a first connecting plate is connected between the two first fixed seats; the second bracket includes two second fixed seats arranged at a distance along the second direction, and a second connecting plate is connected between the two second fixed seats, the first connecting plate and the second connecting plate are spaced apart in the first direction and define the clearance groove.

[0012] According to some embodiments of this application, the first fixing seat and the second fixing seat are disposed opposite to each other in the first direction, and the first fixing seat and the second fixing seat are engaged.

[0013] According to some embodiments of this application, each of the two first fixing seats is provided with a first snap-fit ​​portion, each group of the first snap-fit ​​portions includes at least one buckle and / or at least one slot, and the two groups of the first snap-fit ​​portions are asymmetrically arranged; each of the two second fixing seats is provided with a second snap-fit ​​portion, each group of the second snap-fit ​​portions includes at least one buckle and / or at least one slot, and the two groups of the second snap-fit ​​portions are asymmetrically arranged; wherein, the first snap-fit ​​portion of the first fixing seat and the second snap-fit ​​portion of the second fixing seat are snap-fitted together in the first direction.

[0014] According to some embodiments of this application, the electrode assembly further includes an insulating film, which is welded to the support body. The support body has a positioning post on the side wall away from the receiving groove. The positioning post protrudes to the side away from the receiving groove and is used for positioning and cooperating with the welding fixture.

[0015] The battery module according to the second aspect of this application includes the battery described above.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 is a partial cross-sectional view of a battery according to an embodiment of the present application Figure 1 ;

[0019] Figure 2 is a partial cross-sectional view of a battery according to an embodiment of the present application Figure 2 ;

[0020] Figure 3 is a structural schematic diagram of a bracket according to an embodiment of the present application;

[0021] Figure 4 is a structural schematic diagram of a first bracket according to an embodiment of the present application Figure 1 ;

[0022] Figure 2 is a structural schematic diagram of a first bracket according to an embodiment of the present application Figure 6 ;

[0023] Figure 7 is a structural schematic diagram of a second bracket according to an embodiment of the present application;

[0024] Figure 1 is a front view of a first bracket according to an embodiment of the present application Figure 8 ;

[0025] Figure 2 is a front view of a second bracket according to an embodiment of the present application Figures 1-8 .

[0026] Reference Signs:

[0027] Battery 100;

[0028] Cover plate 1; lower plastic 11; electrical connection end 12;

[0029] Pole group 2; pole lug 21;

[0030] Bracket 3; accommodating groove 301; avoiding groove 302; bracket main body 31; insulating support plate 311; support edge 32; first bracket 33; first fixing seat 331; first connecting plate 332; first clamping portion 333; second bracket 34; second fixing seat 341; second connecting plate 342; second clamping portion 343; positioning column 35; buckle 361; clamping groove 362. DETAILED DESCRIPTION

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] The following is for reference. Figure 3 A battery 100 according to an embodiment of this application is described.

[0033] The battery 100 according to this application includes: a cover plate 1, a housing, an electrode assembly 2, and a support 3. The cover plate 1 covers the housing to form a receiving space for accommodating the electrode assembly 2. A lower plastic 11 is provided on the inner side of the cover plate 1 (i.e., the side of the cover plate 1 facing the receiving space). The support 3 forms a receiving groove 301 that opens to one side of the cover plate 1, and the support 3 and the lower plastic 11 are engaged and positioned, that is, the lower plastic 11 is arranged in the receiving groove 301, and the support 3 and the lower plastic 11 are positioned to improve the reliability of the fit between the support 3 and the lower plastic 11.

[0034] When the bracket 3 and the lower plastic 11 are fastened together, the open end of the receiving groove 301 abuts against the inner surface of the cover plate 1 to achieve positioning and engagement between the bracket 3 and the cover plate 1. The bracket 3 is formed with a relief groove 302 for the electrode tab 21 to pass through, and the bracket 3 is connected and engaged with the electrode group 2.

[0035] The electrode assembly 2 has a tab 21. The main body of the electrode assembly 2 is arranged on the side of the bracket 3 away from the cover plate 1. The tab 21 of the electrode assembly 2 can pass through the bracket 3 through the clearance groove 302, and the tab 21 can be electrically connected and cooperate with the electrical connection terminal 12 (e.g., pole) arranged on the cover plate 1. It should be noted that "the bracket 3 and the electrode assembly 2 are connected and cooperated" means that the bracket 3 can be connected and fixed to the insulating film in the electrode assembly 2, and the bracket 3 can play a role in limiting or circumferentially supporting the electrode assembly 2 arranged in the housing, so as to improve the reliability of the arrangement of the electrode assembly 2 in the housing.

[0036] Currently, batteries are increasingly used in various aspects of life. In related technologies, batteries (such as blade batteries) typically use a bracket and a lower plastic clip to fix the tabs. This can lead to damage to the clip structure during casing installation, affecting the assembly of the battery cells. Furthermore, the clip-fit ​​installation method requires a large assembly space to accommodate the design of the clip structure, which affects the battery's energy density.

[0037] In this application, the bracket 3 is installed and fitted with the lower plastic 11 through a snap-fit ​​mechanism, eliminating the need for a snap-fit ​​structure. This reduces the difficulty of inserting components such as the electrode assembly 2 and the bracket 3 into the casing, improves assembly efficiency, and ensures the reliability of the assembly between the bracket 3 and the lower plastic 11. Furthermore, the bracket 3 has a clearance groove 302 to avoid interference between the bracket 3 and the electrode 21, facilitating the connection and engagement of the electrode 21 with the electrical connection terminal 12 on the cover plate 1. Simultaneously, compared to existing technologies, the snap-fit ​​structure is eliminated, thereby improving the space utilization of the battery 100 within the casing and contributing to an increase in the energy density of the battery 100.

[0038] like Figure 1 As shown, in some embodiments of this application, the bracket 3 includes a bracket body 31 and a support edge 32. A clearance groove 302 is formed on the side of the bracket body 31 away from the cover plate 1. The support edge 32 is disposed on the side of the bracket body near the cover plate 1. The support edge 32 extends from the bracket body 31 toward the cover plate 1, and the end of the support edge 32 is adapted to abut against the cover plate 1. The support edge 32 extends along the circumferential direction of the bracket body 31, and the support edge 32 can be arranged around the lower plastic 11 in the circumferential direction, so that the support edge 32 and the lower plastic 11 are positioned and engaged in the circumferential direction of the lower plastic 11.

[0039] Combination Figure 3 and Figure 5 As shown, the electrode assembly 2 is arranged on the lower side of the support body 31, and the clearance groove 302 is formed in the lower part of the support body 31. Part of the electrode tab 21 on the electrode assembly 2 can pass through the clearance groove 302 through the support body 31 and extend further towards the cover plate 1 to facilitate the connection and engagement of the electrode tab 21 with the electrical connection terminal 12. At the same time, the support edge 32 extends upward from the main body (i.e., the cover plate 1 side) to form the aforementioned receiving groove 301 by engaging with the support body 31. The support edge 32 can abut against the cover plate 1, thereby positioning the support 3 and the cover plate 1 and improving the assembly reliability of the support 3 and the cover plate 1.

[0040] It should be noted that the above description of orientation (e.g., up, down, etc.) is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] like Figure 4As shown, in some embodiments of this application, the support edge 32 protrudes from the bracket body 31 by a height L, and satisfies the relationship: L≥0.5mm. It can be understood that the height of the support edge 32 protruding from the bracket body 31 is the depth dimension of the receiving groove 301. When L satisfies the above relationship, the lower plastic 11 can be completely contained within the receiving groove 301, ensuring that the support edge 32 can abut against the inner surface of the cover plate 1, thus improving the reliability of the fit between the bracket 3 and the cover plate 1.

[0042] like Figure 1 As shown, in some embodiments of this application, the bracket body 31 is provided with an insulating support plate 311, which is disposed opposite to the cover plate 1. The surface of the insulating support plate 311 opposite to the cover plate 1 is disposed lower than the support edge 32. The insulating support plate 311 is used to support the electrode tab 21 to improve the connection reliability between the electrode tab 21 and the electrical connection terminal 12.

[0043] Combination Figure 4 and Figure 1 As shown, when the bracket 3 and the cover plate 1 are fastened together, the insulating support plate 311 is located below the pole post, and the insulating support plate 311 is arranged opposite to the electrical connection end 12. The part of the pole lug 21 that passes through the bracket 3 can be bent toward the insulating support plate 311 and overlapped and supported on the insulating support plate 311. After the pole lug 21 is welded to the electrical connection end 12 on the cover plate 1, the pole lug 21 is sandwiched between the insulating support plate 311 and the electrical connection end 12, so that the insulating support plate 311 limits and supports the pole lug 21, thereby improving the connection reliability between the pole lug 21 and the electrical connection end 12.

[0044] In some embodiments of this application, the insulating support plate 311 is configured to be flipped and mounted on the bracket body 31. During the assembly of the battery 100, the insulating support plate 311 can be flipped to a position suitable for supporting the tab 21. The tab 21 passes through the bracket body 31 via the clearance groove 302. The portion of the tab 21 extending beyond the surface of the insulating support plate 311 and the cover plate 1 can be bent toward the insulating support plate 311 so that a portion of the tab 21 can be overlapped and arranged on the insulating support plate 311.

[0045] Furthermore, after the tab 21 is welded to the cover plate 1, the tab 21 is sandwiched between the insulating support plate 311 and the cover plate 1 to avoid problems such as bending of the tab 21, reduce the risk of the tab 21 being inserted upside down, and improve the safety performance of the battery 100.

[0046] In some preferred embodiments of this application, after the insulating support plate 311 is folded over, the side surface of the insulating support plate 311 opposite to the cover plate 1 is set parallel to the connection mating surface of the electrode tab 21 and the electrical connection end 12 in the cover plate 1, thereby improving the constraint effect of the insulating support plate 311 and the cover plate 1 on the electrode tab 21.

[0047] It should be noted that the flipping form of the insulating support plate 311 within the bracket body 31 is not specifically limited here. For example, the insulating support plate 311 can be integrally formed with the bracket body 31, and the flipping can be achieved through an imprinted structure formed during molding of the insulating support plate 311 and the bracket body 31. Simultaneously, the height of the insulating support plate 311 within the bracket 3 is lower than the support edge 32, allowing the insulating support plate 311 to avoid obstructing the lower plastic 11. Preferably, the insulating support plate 311 is positioned below the bottom of the receiving groove 301 to prevent it from occupying space in the receiving groove 301 and interfering with the lower plastic 11.

[0048] Combination Figure 3 and Figure 4 As shown, in some embodiments of this application, the support body 31 includes a first support 33 and a second support 34. The first support 33 and the second support 34 are arranged and connected along a first direction, and an avoidance groove 302 is formed between the first support 33 and the second support 34.

[0049] It is understandable that the support body 31 is composed of two parts: a first support 33 and a second support 34, which reduces the molding difficulty of the support body 31. The first support 33 and the second support 34 are arranged along the first direction, and a portion of the first support 33 and a portion of the second support 34 are spaced apart in the first direction to form a clearance groove 302, thereby eliminating the need to process openings in the support structure and reducing the molding difficulty of the support 3.

[0050] In some embodiments of this application, when the support body 31 is composed of a first support 33 and a second support 34, the first support 33 and the second support 34 may be respectively provided with insulating support plates 311 so as to support two tabs 21 of different polarities through the two insulating support plates 311 respectively.

[0051] like Figure 5 and Figure 5 As shown, in some embodiments of this application, the first bracket 33 includes two first fixing seats 331 arranged at intervals along a second direction, and a first connecting plate 332 is connected between the two first fixing seats 331 to connect and fix the two first fixing seats 331 through the first connecting plate 332.

[0052] Among them, reference Figure 3 The connection position of the first connecting plate 332 and the first fixing base 331 is set higher than the bottom of the first fixing base 331, thereby reserving a certain space between the bottom of the first connecting plate 332 and the first fixing base 331, increasing the space in the housing for arranging the electrode group 2, which helps to improve the energy density of the battery 100.

[0053] Combination Figure 6 and Figure 6 As shown, in some embodiments of this application, the second bracket 34 includes two second fixing seats 341 arranged at intervals along a second direction, and a second connecting plate 342 is connected between the two second fixing seats 341 to connect and fix the two second fixing seats 341 through the second connecting plate 342.

[0054] Among them, reference Figure 1 The connection position of the second connecting plate 342 and the second fixing base 341 is set higher than the bottom of the second fixing base 341, thereby reserving a certain space between the bottom of the second connecting plate 342 and the second fixing base 341, increasing the space in the housing for arranging the electrode group 2, which helps to improve the energy density of the battery 100.

[0055] Combination Figure 2 , Figure 3 and Figure 3 As shown, the first connecting plate 332 and the second connecting plate 342 are spaced apart in the first direction, and a clearance groove 302 is defined between the first connecting plate 332 and the second connecting plate 342, the clearance groove 302 allowing the tab 21 to pass through.

[0056] It should be noted that the connecting plates (e.g., the first connecting plate 332 and the second connecting plate 342) are used to connect the fixing seats (e.g., the first fixing seat 331 and the second fixing seat 341 mentioned above). The connecting plates have a simple structure and occupy little space. When the bracket 3 and the lower plastic 11 are fastened together, the connecting plates can be arranged at intervals with the cover plate 1 to reserve space between the connecting plates and the cover plate 1 for the placement of the electrode tabs 21, thereby reducing the difficulty of connecting and fitting the electrode tabs 21 and the cover plate 1. The shape of the connecting plates is not specifically limited here; it can be an L-shaped plate, a flat plate, etc.

[0057] Reference Figure 3 It is understood that when the support body 31 is composed of two parts, the annular support edge 32 is also divided into at least two parts, which are respectively arranged on the first support 33 and the second support 34, so as to form the aforementioned support edge 32 together when the first support 33 and the second support 34 are connected and cooperated.

[0058] Combination Figure 5 and Figure 3 As shown, the support edge 32 on the first bracket 33 is U-shaped, and the opening of the U-shape faces the second bracket 34; combined with Figure 6 and Figure 5 As shown, the support edge 32 formed on the second bracket 34 is U-shaped, and the opening of the U-shape faces the first bracket 33. When the first bracket 33 and the second bracket 34 are connected and engaged, the two U-shaped support edges 32 together form an annular support edge 32.

[0059] Combination Figure 6 and Figure 7 As shown in a further embodiment of this application, the first fixing seat 331 and the second fixing seat 341 are arranged opposite to each other in a first direction, and the first fixing seat 331 and the second fixing seat 341 are engaged in a snap-fit ​​assembly. The snap-fit ​​assembly method is simple and highly reliable, which can ensure the reliability of the connection between the first bracket 33 and the second bracket 34.

[0060] In a further embodiment of this application, two first fixing seats 331 are respectively provided with a first snap-fit ​​portion 333, and two second fixing seats 341 are respectively provided with a second snap-fit ​​portion 343. The first snap-fit ​​portion 333 of the first fixing seat 331 and the second snap-fit ​​portion 343 of the second fixing seat 341 are snap-fitted together in a first direction.

[0061] Each set of first latching portions 333 can be composed of at least one of a buckle 361 and a slot 362. That is, the first latching portion 333 can include at least one buckle 361, the first latching portion 333 can include at least one slot 362, or the first latching portion 333 can include at least one buckle 361 and at least one slot 362. Similarly, each set of second latching portions 343 can be composed of at least one of a buckle 361 and a slot 362. That is, the first latching portion 333 can include at least one buckle 361, the first latching portion 333 can include at least one slot 362, or the first latching portion 333 can include at least one buckle 361 and at least one slot 362.

[0062] Thus, the two first fixing seats 331 and the two second fixing seats 341 are connected by two sets of first locking parts 333 and second locking parts 343 respectively.

[0063] In some embodiments of this application, the two sets of first latching portions 333 are asymmetrically arranged, and the two sets of second latching portions 343 are asymmetrically arranged, which can play a role in preventing errors, assisting in the assembly of the first bracket 33 and the second bracket 34, and preventing the first bracket 33 and the second bracket 34 from being installed in reverse.

[0064] like Figure 8 As shown, in a specific embodiment of this application, the first bracket 33 has two first fixing seats 331. Each first fixing seat 331 has a first snap-fit ​​portion 333 including a slot 362 and a buckle 361. The two sets of first snap-fit ​​portions 333 are arranged asymmetrically on the two first fixing seats 331.

[0065] like Figure 6As shown, in a specific embodiment of this application, the first bracket 33 has two first fixing seats 331, one of which has a first snap-fit ​​portion 333 consisting of two buckles 361, and the other has a first snap-fit ​​portion 333 consisting of two slots 362.

[0066] It should be noted that the above specific embodiment is only one example of the first bracket 33, and the structure of the first bracket 33 is not limited thereto. At the same time, on the second bracket 34, the structure of the second snap-fit ​​portion 343 in the second fixing seat 341 can be adapted to the first snap-fit ​​portion 333 that mates with it, so as to meet the snap-fit ​​requirements of the first snap-fit ​​portion 333 and the second snap-fit ​​portion 343.

[0067] like ​ As shown, in some embodiments of this application, the electrode assembly 2 further includes an insulating film, which is welded to the support body 31. The support body 31 has a positioning post 35 on the side wall away from the receiving groove 301. The positioning post 35 protrudes to the side away from the receiving groove 301 and is used to position and cooperate with the welding fixture.

[0068] The bracket body 31 is welded to the insulating film to connect the bracket 3 and the electrode group 2, thus facilitating the connection between the electrode group 2 and the bracket 3. Simultaneously, during the welding process between the insulating film and the bracket body 31, positioning posts 35 located on the outer peripheral wall of the bracket body 31 (i.e., the side wall of the bracket body 31 facing away from the receiving groove 301) can be used in conjunction with welding fixtures to assist in the welding of the bracket body 31 and the insulating film, reducing operational difficulty and ensuring the welding effect between the bracket body 31 and the insulating film.

[0069] According to the battery module of the present application embodiment, the battery module includes the battery 100 described above.

[0070] Among them, the advantages of the battery module compared with the existing technology are the same as those of the aforementioned battery 100, and will not be repeated here.

[0071] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0072] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0073] In the description of this application, "multiple" means two or more.

[0074] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0075] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery, characterized in that, include: A cover plate (1) and a housing, wherein the cover plate (1) covers the housing and the inner side of the cover plate (1) is provided with a lower plastic (11); A pole group (2) having tabs (21) formed thereon; The bracket (3) has a receiving groove (301) that opens to one side of the cover plate (1). The bracket (3) is fastened and positioned with the lower plastic (11), and the open end of the receiving groove (301) abuts against the inner surface of the cover plate (1). The bracket (3) has a clearance groove (302) for the electrode tab (21) to pass through and is connected to the electrode assembly (2).

2. The battery according to claim 1, characterized in that, The support (3) includes: The bracket body (31) has the clearance groove (302) formed on the side of the bracket body (31) away from the cover plate (1); Support edge (32) is provided on the side of the bracket body near the cover plate (1). The support edge (32) extends from the bracket body (31) toward the cover plate (1) and abuts against the cover plate (1). The support edge (32) extends along the circumferential direction of the bracket body (31) and is adapted to be arranged around the lower plastic (11).

3. The battery according to claim 2, characterized in that, The height of the support edge (32) protruding from the main body of the bracket (31) is L, and satisfies the relationship: L≥0.5mm.

4. The battery according to claim 2, characterized in that, The main body (31) of the bracket is provided with an insulating support plate (311), which is disposed opposite to the cover plate (1). The side surface of the insulating support plate (311) opposite to the cover plate (1) is lower than the support edge (32) and is used to support the tab (21).

5. The battery according to claim 2, characterized in that, The main body of the support (31) includes a first support (33) and a second support (34), the first support (33) and the second support (34) are arranged and connected along a first direction, and the clearance groove (302) is formed between the first support (33) and the second support (34).

6. The battery according to claim 5, characterized in that, The first bracket (33) includes two first fixing seats (331) arranged at intervals along the second direction, and a first connecting plate (332) is connected between the two first fixing seats (331); The second bracket (34) includes two second fixing seats (341) arranged at intervals along the second direction, and a second connecting plate (342) is connected between the two second fixing seats (341). The first connecting plate (332) and the second connecting plate (342) are spaced apart in the first direction and define the clearance groove (302).

7. The battery according to claim 6, characterized in that, The first fixing seat (331) and the second fixing seat (341) are arranged opposite to each other in the first direction, and the first fixing seat (331) and the second fixing seat (341) are engaged.

8. The battery according to claim 7, characterized in that, The two first fixing seats (331) are respectively provided with a first snap-fit ​​part (333), each set of first snap-fit ​​parts (333) includes at least one buckle (361) and / or at least one slot (362), and the two sets of first snap-fit ​​parts (333) are asymmetrically arranged; Each of the two second fixing seats (341) is provided with a second snap-fit ​​portion (343), and each set of second snap-fit ​​portions (343) includes at least one buckle (361) and / or at least one slot (362), and the two sets of second snap-fit ​​portions (343) are arranged asymmetrically; wherein, The first snap-fit ​​portion (333) of the first fixing seat (331) and the second snap-fit ​​portion (343) of the second fixing seat (341) are snap-fitted together in the first direction.

9. The battery according to claim 2, characterized in that, The electrode assembly (2) also includes an insulating film, which is welded to the support body (31). The support body (31) has a positioning post (35) on the side wall away from the receiving groove (301). The positioning post (35) protrudes to the side away from the receiving groove (301) and is used to position and cooperate with the welding fixture.

10. A battery module, characterized in that, Includes the battery according to any one of claims 1-9.

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