Battery and battery pack

Abstract

The utility model discloses a battery and a battery pack, and belongs to the technical field of batteries. The battery comprises a shell with an accommodating cavity and an opening; the electrode assembly is arranged in the accommodating cavity; the top cover sheet covers the opening and is provided with a pole hole; the pole penetrates through the pole hole and is connected with the electrode assembly; the first limiting piece comprises a first limiting part and a second limiting part, the second limiting part is connected with the top cover piece, the first limiting part and the top cover piece form a limiting groove, and part of the pole is embedded in the limiting groove; the first insulating part is partially arranged in the pole hole in a penetrating manner and surrounds the pole; one of the top cover piece and the first insulating piece is provided with a first convex part, the other one is provided with a first groove for embedding the first convex part, one of the pole and the first insulating piece is provided with a second convex part, and the other one is provided with a second groove for embedding the second convex part. According to the invention, through the embedding of the first convex part and the first groove as well as the embedding of the second convex part and the second groove, the top cover sheet, the pole and the first insulating part are mutually limited, so that the torsion resistance of the pole is improved.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery and a battery pack. Background Art

[0002] In a battery structure, the pole post is usually connected to the battery top cover by a riveting process. As an important conductive structure, the pole post needs to be connected to various conductive structures. When the battery is applied in fields such as the automotive field, it is often in a vibrating state. The pole post needs to withstand circumferential torsional forces, and there is a risk of the pole post detaching from the battery top cover. Therefore, the torsional resistance of the pole post assembly structure directly affects the yield rate of battery manufacturing and the use safety. Summary of the Utility Model

[0003] Utility Model Objective: The embodiments of this application provide a battery, aiming to solve the above technical problems; another objective of this application is to provide a battery pack applying the above battery.

[0004] Technical Solution: A battery described in the embodiments of this application. The battery has a first direction, and the battery includes:

[0005] A housing having a receiving cavity and an opening communicating with the receiving cavity;

[0006] An electrode assembly disposed in the receiving cavity;

[0007] A top cover sheet covering the opening. The top cover sheet is provided with a pole post hole, and the pole post hole penetrates the top cover sheet in the first direction;

[0008] A pole post partially passing through the pole post hole, and the pole post is connected to the electrode assembly;

[0009] A first limiting member located on the side of the top cover sheet facing the electrode assembly. The first limiting member includes a first limiting portion and a second limiting portion surrounding the first limiting portion. The second limiting portion is connected to the top cover sheet and surrounds the pole post. The first limiting portion and the top cover sheet form a limiting groove in the first direction, and a part of the pole post is embedded in the limiting groove;

[0010] A first insulating member, a part of which passes through the pole post hole and surrounds the pole post, and at least a part of the first insulating member abuts between the top cover sheet and the pole post;

[0011] Wherein, one of the top cover sheet and the first insulating member is provided with a first convex portion, and the other is provided with a first groove for the first convex portion to be embedded. And one of the pole post and the first insulating member is provided with a second convex portion, and the other is provided with a second groove for the second convex portion to be embedded.

[0012] In some embodiments, the first protrusion and the second protrusion are respectively provided on the first insulating member, the first groove is provided on the top cover sheet, and the second groove is provided on the pole.

[0013] In some embodiments, the first protrusion, the second protrusion, the first groove and the second groove are respectively provided in plurality, and each of the first protrusions is respectively embedded in one of the first grooves, and each of the second protrusions is respectively embedded in one of the second grooves.

[0014] In some embodiments, a plurality of the first protrusions are spaced and distributed around the pole;

[0015] And / or, a plurality of the second protrusions are spaced apart and distributed around the pole.

[0016] In some embodiments, the electrode column includes a first column portion, a second column portion and a third column portion arranged in a first direction, the first column portion is located on a side of the third column portion away from the electrode assembly, and the second column portion is at least partially located in the limiting groove;

[0017] The first insulating member includes a first insulating portion surrounding the first column portion, the first insulating portion abuts against the first column portion and the top cover sheet, and the first convex portion and the second convex portion are respectively provided on the first insulating portion.

[0018] In some embodiments, the first insulating member further includes a second insulating portion, the second insulating portion is connected to a side of the first insulating portion facing away from the first column portion, the second insulating portion is at least partially disposed in the limiting groove, and the second insulating portion abuts against the second column portion and the top cover sheet.

[0019] In some embodiments, a ring groove is formed on one side of the top cover sheet facing the electrode assembly, and the ring groove surrounds the pole hole and communicates with the pole hole;

[0020] The first limiting member further includes a third limiting portion surrounding the pole, the third limiting portion is connected to a side of the second limiting portion away from the first limiting portion, and the third limiting portion is embedded in the annular groove and connected to the top cover sheet.

[0021] In some embodiments, the battery further comprises:

[0022] A sealing member, wherein the sealing member is arranged in the limiting groove, and the sealing member comprises a first sealing portion and a second sealing portion which are connected to each other, wherein the first sealing portion is arranged between the second column portion and the second limiting portion, and the first sealing portion abuts against the second column portion and the second limiting portion, and the second sealing portion is arranged between the first limiting portion and the second column portion, and the second sealing portion abuts against the first limiting portion and the second column portion.

[0023] In some embodiments, the battery further includes:

[0024] A second insulating member, which includes a third insulating portion and a fourth insulating portion connected to each other. The third insulating portion is disposed on the side of the top cover sheet facing the electrode assembly, and the third insulating portion covers the first limiting member. At least a part of the fourth insulating portion is disposed between the first limiting portion and the third column portion, and the fourth insulating portion surrounds the third column portion.

[0025] In some embodiments, a part of the first insulating member is embedded in the limiting groove, and one of the first insulating member and the first limiting member is provided with a third convex portion, and the other is provided with a third groove for the third convex portion to be embedded.

[0026] Correspondingly, a battery pack according to an embodiment of the present application includes the above-mentioned battery.

[0027] Advantageous effects: The battery of the embodiment of the present application includes a housing, an electrode assembly, a top cover sheet, a pole column, a first limiting member, and a first insulating member. The housing has a receiving cavity and an opening communicating with the receiving cavity. The electrode assembly is disposed in the receiving cavity, and the top cover sheet covers the opening. The top cover sheet is provided with a pole column hole, and the pole column partially passes through the pole column hole and is connected to the electrode assembly. The first limiting member is located on the side of the top cover sheet facing the electrode assembly. The first limiting member includes a first limiting portion and a second limiting portion surrounding the first limiting portion. The second limiting portion is connected to the top cover sheet and surrounds the pole column. The first limiting portion and the top cover sheet form a limiting groove in a first direction, and a part of the pole column is embedded in the limiting groove. A part of the first insulating member passes through the pole column hole and surrounds the pole column, and at least a part of the first insulating member abuts between the top cover sheet and the pole column; one of the top cover sheet and the first insulating member is provided with a first convex portion, and the other is provided with a first groove for the first convex portion to be embedded. One of the pole column and the first insulating member is provided with a second convex portion, and the other is provided with a second groove for the second convex portion to be embedded. By embedding the first convex portion in the first groove and the second convex portion in the second groove, a mutual limiting effect is formed among the top cover sheet, the pole column, and the first insulating member, thereby improving the torsional resistance of the pole column. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0029] Figure 1 It is a schematic structural diagram of the battery according to the embodiment of the present application;

[0030] Figure 2 It is a schematic explosion structure diagram of the battery according to an embodiment of the present application;

[0031] Figure 3 It is a schematic structure diagram of the top cover structure according to an embodiment of the present application;

[0032] Figure 4 is Figure 3 a partial cross-sectional view along line A-A in

[0033] Figure 5 It is a schematic explosion structure diagram of the pole column, the first limiting member, the first insulating member and the sealing member according to an embodiment of the present application;

[0034] Figure 6 It is a schematic structure diagram of the top cover sheet according to an embodiment of the present application;

[0035] Figure 7 It is a schematic structure diagram of the top cover structure according to another embodiment of the present application;

[0036] Figure 8 is Figure 7 a partial cross-sectional view along line B-B in

[0037] Figure 9 It is a schematic structure diagram of the first limiting member according to another embodiment of the present application;

[0038] Figure 10 It is a schematic structure diagram of the first insulating member according to another embodiment of the present application;

[0039] Reference numerals: 1, battery; 10, housing; 100, accommodation cavity; 101, opening; 11, electrode assembly; 12, top cover sheet; 120, pole column hole; 121, first groove; 122, annular groove; 123, pressure relief valve; 124, pressure relief hole; 13, pole column; 130, second groove; 131, first column part; 132, second column part; 133, third column part; 14, first limiting member; 140, first limiting part; 141, second limiting part; 142, limiting groove; 143, third groove; 144, third limiting part; 15, first insulating member; 150, first convex part; 151, second convex part; 152, first insulating part; 153, second insulating part; 154, third convex part; 16, sealing member; 160, first sealing part; 161, second sealing part; 17, second insulating member; 170, third insulating part; 171, fourth insulating part; X, first direction. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more, and at least one means one, two or more, unless otherwise specifically defined.

[0042] The terminal post of the battery is a key component for electrically connecting the electrode assembly and external devices. During the battery manufacturing process, it is usually necessary to rivet the terminal post to the battery top cover and weld the conductive connection ends. In addition, it is necessary to injection mold the upper plastic around the terminal post to form insulation and fixedly support the terminal post.

[0043] When the battery is applied to electrical equipment such as automobiles, it often needs to be in a vibrating state, and the terminal post needs to bear the circumferential torsional force, which undoubtedly increases the risk of the terminal post detaching from the battery top cover. Therefore, the torsional resistance of the terminal post assembly structure directly affects the yield rate and use safety of battery manufacturing.

[0044] In view of this, in combination with Figures 1 to 10 , the embodiments of the present application provide a battery, aiming to overcome at least one of the above technical problems.

[0045] In the following embodiments, a first direction X is introduced, and the first direction X is parallel to the thickness direction of the battery top cover structure in this embodiment.

[0046] Referring to Figures 1 to 10 , a battery 1 includes a housing 10, an electrode assembly 11, a top cover sheet 12, a terminal post 13, a first limiting member 14, and a first insulating member 15.

[0047] Among them, the housing 10 has a receiving cavity 100 and an opening 101 communicating with the receiving cavity 100. The electrode assembly 11 is disposed in the receiving cavity 100. The top cover sheet 12 is covered on the opening 101. The top cover sheet 12 is provided with a pole hole 120. The pole hole 120 penetrates the top cover sheet 12 in the first direction X. The pole 13 is partially inserted into the pole hole 120 and connected to the electrode assembly 11. The first limiting member 14 is located on the side of the top cover sheet 12 facing the electrode assembly 11. The first limiting member 14 includes a first limiting portion 140 and a second limiting portion 141 surrounding the first limiting portion 140. The second limiting portion 141 is connected to the top cover sheet 12 and surrounds the pole 13. The first limiting portion 140 and the top cover sheet 12 form a limiting groove 142 in the first direction X. A part of the pole 13 is embedded in the limiting groove 142. A part of the first insulating member 15 is inserted into the pole hole 120 and surrounds the pole 13. At least a part of the first insulating member 15 abuts between the top cover sheet 12 and the pole 13.

[0048] One of the top cover sheet 12 and the first insulating member 15 is provided with a first convex portion 150, and the other is provided with a first groove 121 for the first convex portion 150 to be embedded. One of the pole 13 and the first insulating member 15 is provided with a second convex portion 150, and the other is provided with a second groove 130 for the second convex portion 150 to be embedded.

[0049] It can be understood that the top cover sheet 12 and the first limiting member 14 clamp the pole 13 in the first direction X, thereby improving the limiting effect on the pole 13 and enhancing the torsional strength of the pole 13. On this basis, by embedding the first convex portion 150 into the first groove 121 and the second convex portion 151 into the second groove 130, a mutual limiting effect is formed among the top cover sheet 12, the pole 13, and the first insulating member 15, further improving the torsional resistance of the pole 13.

[0050] It should be noted that in this embodiment, referring to Figures 3 to 5 , the first convex portion 150 and the second convex portion 151 are respectively provided on the first insulating member 15, the first groove 121 is provided on the top cover sheet 12, and the second groove 130 is provided on the pole 13.

[0051] In other embodiments, the first convex portion 150 may also be provided on the top cover sheet 12, the second convex portion 151 may be provided on the pole 13, and the corresponding first groove 121 and second groove 130 are adaptively distributed on the first insulating member 15 for the first convex portion 150 and the second convex portion 151 to be respectively embedded.

[0052] In other embodiments, the first convex portion 150 may also be provided on the top cover sheet 12, the second convex portion 151 may be provided on the first insulating member 15, the corresponding first groove 121 is provided on the first insulating member 15, and the second groove 130 is provided on the pole 13.

[0053] In other embodiments, the first protrusion 150 may also be provided on the first insulating member 15 , the second protrusion 151 may be provided on the pole 13 , the corresponding first groove 121 may be provided on the top cover sheet 12 , and the second groove 130 may be provided on the first insulating member 15 .

[0054] The purpose is to limit the top cover sheet 12 , the pole 13 and the first insulating member 15 to each other through the first protrusion 150 , the second protrusion 151 , the first groove 121 and the second groove 130 , which will not be described in detail here.

[0055] Specifically, refer to Figures 3 to 5 The pole 13 includes a first column portion 131, a second column portion 132 and a third column portion 133 arranged in the first direction X, the first column portion 131 is located on the side of the third column portion 133 away from the electrode assembly 11, and the second column portion 132 is at least partially located in the limiting groove 142. The first insulating member 15 includes a first insulating portion 152 surrounding the first column portion 131 and a second insulating portion 153 connecting the side of the first insulating portion 152 away from the first column portion 131, the first insulating portion 152 abuts the first column portion 131 and the top cover sheet 12, and the first convex portion 150 is provided on the first insulating portion 152. The second insulating portion 153 is at least partially provided in the limiting groove 142, and the second insulating portion 153 abuts the second column portion 132 and the top cover sheet 12.

[0056] It should be noted that the first column portion 131, the second column portion 132 and the third column portion 133 can be made of the same material such as aluminum in one piece. In other embodiments, the first column portion 131, the second column portion 132 and the third column portion 133 can also be made of different materials. For example, the first column portion 131 and the second column portion 132 can be made of aluminum, and the third column portion 133 can be made of copper to better conduct electricity and connect the electrode assembly 11.

[0057] In addition, it can be understood that, since the first stopper 14 is disposed on the side of the top cover sheet 12 facing the electrode assembly 11, Figure 4 In this embodiment, the side of the first column portion 131 away from the second column portion 132 can be flush with the side of the top cover sheet 12 away from the electrode assembly 11, which is beneficial to reducing the space occupied by the pole 13 in the first direction X of the battery 1 and is beneficial to improving the energy density of the battery 1.

[0058] In some embodiments, reference Figures 4 to 6 The first protrusion 150 and the second protrusion 151 are disposed at one end of the first insulating portion 152 away from the second column portion 132 .

[0059] It is understandable that the first protrusion 150 and the second protrusion 151 can be integrally formed with the first insulating member 15 , that is, during the injection molding process of the first insulating member 15 , the portions injected into the first groove 121 and the second groove 130 naturally form the corresponding first protrusion 150 and the second protrusion 151 .

[0060] Specifically, the second protrusion 151 is formed to extend in a direction approaching the first column portion 131 along the radial direction of the first insulating portion 152 , and the first protrusion 150 is formed to extend in a direction away from the first column portion 131 along the radial direction of the first insulating portion 152 .

[0061] Along the first direction X, the thickness of the second protrusion 151 is smaller than the thickness of the first protrusion 150. Since the contact area between the first protrusion 150 and the top cover sheet 2 is larger, such a design can further improve the structural strength of the top cover assembly, thereby further improving the torsional resistance of the pole 13.

[0062] The cross-sections of the first convex portion 150 and the second convex portion 151 are rectangular. The shapes of the first groove 121 and the second groove 130 may also be designed to be other shapes, such as circular or other irregular shapes, according to requirements.

[0063] In order to further improve the torsion resistance of the pole 13, in some embodiments, the first protrusion 150, the second protrusion 151, the first groove 121 and the second groove 130 are respectively provided in plurality, and each first protrusion 150 is respectively embedded in a first groove 121, and each second protrusion 151 is respectively embedded in a second groove 130. The first grooves 121 and the second grooves 130 corresponding to the plurality of first protrusions 150 and the plurality of second protrusions 151 are respectively spaced and evenly distributed around the pole 13. In this embodiment, the first protrusion 150, the second protrusion 151, the first groove 121 and the second groove 130 are each provided with four as an example, and in other embodiments, the number of the first protrusion 150, the second protrusion 151, the first groove 121 and the second groove 130 can be flexibly increased or decreased according to actual needs.

[0064] In addition, it can be understood that, in some embodiments, the setting positions of the first protrusion 150 and the second protrusion 151 can also be adjusted along the first direction X by adjusting the opening positions of the first groove 121 and the second groove 130 along the first direction X, which will not be repeated here.

[0065] In some embodiments, reference Figure 4 , the top cover sheet 12 is provided with an annular groove 122 on one side facing the electrode assembly 11, the annular groove 122 surrounds the pole hole 120 and is in communication with the pole hole 120. The first stopper 14 also includes a third stopper 144 surrounding the pole 13, the third stopper 144 is connected to the side of the second stopper 141 away from the first stopper 140, and the third stopper 144 is embedded in the annular groove 122 and connected to the top cover sheet 12. By pre-setting the annular groove 122 on the top cover sheet 12, it is convenient to quickly position and assemble the first stopper 14, and the assembly stability of the first stopper 14 is improved. In practice, the first stopper 14 can be welded to the top cover sheet 12 by using the third stopper 144.

[0066] In some embodiments, referring to Figure 4 and Figure 5 , in order to improve the sealing effect at the pole hole 120, the battery 1 further includes a seal 16 disposed in the limiting groove 142. The seal 16 includes a first sealing portion 160 and a second sealing portion 161 connected to each other. The first sealing portion 160 is disposed between the second column portion 132 and the second limiting portion 141, and the first sealing portion 160 abuts against the second column portion 132 and the second limiting portion 141. The second sealing portion 161 is disposed between the first limiting portion 140 and the second column portion 132, and the second sealing portion 161 abuts against the first limiting portion 140 and the second column portion 132.

[0067] In some embodiments, referring to Figure 4 , the battery 1 further includes a second insulating member 17. The second insulating member 17 includes a third insulating portion 170 and a fourth insulating portion 171 connected to each other. The third insulating portion 170 is disposed on the side of the top cover sheet 12 facing the electrode assembly 11, and the third insulating portion 170 covers the first limiting member 14. At least a part of the fourth insulating portion 171 is disposed between the first limiting portion 140 and the third column portion 133, and the fourth insulating portion 171 surrounds the third column portion 133.

[0068] It can be understood that the third insulating portion 170 and the fourth insulating portion 171 can be integrally formed by injection molding. The third insulating portion 170 is insulated and spaced between the electrode assembly 11 and the top cover sheet 12. At the same time, the fourth insulating portion 171 further insulates and spaces between the pole 13 and the first limiting member 14, improving the insulation protection of the pole 13. At the same time, the fourth insulating portion 171 forms a fixing effect on the pole 13, improving the torsional resistance of the pole 13.

[0069] In some embodiments, the fourth insulating portion 171 is located between the seal 16 and the first limiting member 14, and the fourth insulating portion 171 abuts against the seal 16, the first limiting member 14, and the third column portion 133.

[0070] The seal 16 cooperates with the fourth insulating portion 171 to surround the pole, and forms multiple seals between the first limiting member 14 and the top cover sheet 12, which is beneficial to improving the airtightness of the pole installation position and improving the safety performance of the battery.

[0071] In addition, in order to further improve the torsional resistance of the pole 13, in some embodiments, referring to Figures 7 to 10, on the side of the second insulating part 153 facing away from the first insulating part 152, there is a third convex part 154. Correspondingly, the first limiting part 14 can be adaptively provided with a third groove 143 for the third convex part 154 to be embedded. During the injection molding process of the first insulating part 15, the third convex part 154 can also be integrally formed with the first insulating part 15. Through the cooperation of the third convex part 154 and the third groove 143, the limiting and fixing effect between the first limiting part 14 and the first insulating part 15 is further improved, thereby improving the fixing effect between the pole column 13 and the top cover piece 12 and enhancing the anti-torsion ability of the pole column 13.

[0072] Among them, the longitudinal cross-sections of the third convex part 154 and the third groove 143 are rectangular. Also, the shapes of the second convex part 153 and the third groove 143 can be designed into other shapes according to requirements, such as circular or other irregular shapes.

[0073] It can be understood that in some embodiments, the third convex part 154 can also be provided on the first limiting part 14. Correspondingly, the third groove 143 is provided on the second insulating part 153, which will not be elaborated here.

[0074] Correspondingly, the embodiment of the present application provides a battery pack, which includes the above-mentioned battery 1. This battery pack can be applied to devices such as electronic devices, energy storage devices, or power vehicles, etc. It can be understood that this battery pack can have all the technical features and corresponding beneficial effects of the above-mentioned battery 1, which will not be elaborated here.

[0075] The above has introduced in detail a battery and a battery pack provided by the embodiments of the present application, and specific examples have been used to elaborate the principle and implementation manner 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; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery (1), characterized in that: The battery (1) has a first direction (X), and the battery (1) comprises: A housing (10), the housing (10) having a receiving cavity (100) and an opening (101) communicating with the receiving cavity (100); An electrode assembly (11), the electrode assembly (11) being arranged in the accommodating cavity (100); A top cover sheet (12), the top cover sheet (12) covering the opening (101), the top cover sheet (12) being provided with a pole hole (120), the pole hole (120) penetrating the top cover sheet (12) in the first direction (X); A pole (13), wherein a portion of the pole (13) is inserted into the pole hole (120), and the pole (13) is connected to the electrode assembly (11); a first limiting member (14), the first limiting member (14) being located on a side of the top cover sheet (12) facing the electrode assembly (11), the first limiting member (14) comprising a first limiting portion (140) and a second limiting portion (141) surrounding the first limiting portion (140), the second limiting portion (141) being connected to the top cover sheet (12) and surrounding the pole (13), the first limiting portion (140) and the top cover sheet (12) forming a limiting groove (142) in the first direction (X), and a portion of the pole (13) being embedded in the limiting groove (142); A first insulating member (15), a portion of which is passed through the pole hole (120) and surrounds the pole (13), and at least a portion of which is in contact with between the top cover sheet (12) and the pole (13); Wherein, one of the top cover sheet (12) and the first insulating member (15) is provided with a first protrusion (150), and the other is provided with a first groove (121) for the first protrusion (150) to be embedded, and one of the pole (13) and the first insulating member (15) is provided with a second protrusion (151), and the other is provided with a second groove (130) for the second protrusion (151) to be embedded.

2. The battery (1) according to claim 1, characterized in that The first convex portion (150) and the second convex portion (151) are respectively provided on the first insulating member (15), the first groove (121) is provided on the top cover sheet (12), and the second groove (130) is provided on the pole (13).

3. The battery (1) according to claim 1, characterized in that The first convex portion (150), the second convex portion (151), the first groove (121) and the second groove (130) are respectively provided in plurality, and each of the first convex portions (150) is respectively embedded in one of the first grooves (121), and each of the second convex portions (151) is respectively embedded in one of the second grooves (130).

4. The battery (1) according to claim 3, characterized in that A plurality of the first protrusions (150) are distributed at intervals around the pole (13); And / or, a plurality of the second protrusions (151) are distributed at intervals around the pole (13).

5. The battery (1) according to claim 2, characterized in that The pole (13) comprises a first pole portion (131), a second pole portion (132) and a third pole portion (133) arranged in a first direction (X), the first pole portion (131) being located on a side of the third pole portion (133) away from the electrode assembly (11), and the second pole portion (132) being at least partially located in the limiting groove (142); The first insulating member (15) comprises a first insulating portion (152) surrounding the first column portion (131), the first insulating portion (152) abuts against the first column portion (131) and the top cover sheet (12), and the first convex portion (150) and the second convex portion (151) are respectively arranged on the first insulating portion (152).

6. The battery (1) according to claim 5, characterized in that The first insulating member (15) further comprises a second insulating portion (153), the second insulating portion (153) being connected to a side of the first insulating portion (152) facing away from the first column portion (131), the second insulating portion (153) being at least partially disposed in the limiting groove (142), and the second insulating portion (153) being in contact with the second column portion (132) and the top cover sheet (12).

7. The battery (1) according to claim 1, characterized in that A ring groove (122) is formed on one side of the top cover sheet (12) facing the electrode assembly (11), and the ring groove (122) surrounds the pole hole (120) and is in communication with the pole hole (120); The first limiting member (14) further comprises a third limiting portion (144) surrounding the pole (13), the third limiting portion (144) being connected to a side of the second limiting portion (141) facing away from the first limiting portion (140), and the third limiting portion (144) being embedded in the annular groove (122) and connected to the top cover sheet (12).

8. The battery (1) according to claim 5, characterized in that Also includes: A sealing member (16), wherein the sealing member (16) is disposed in the limiting groove (142), and the sealing member (16) comprises a first sealing portion (160) and a second sealing portion (161) which are connected to each other, wherein the first sealing portion (160) is disposed between the second column portion (132) and the second limiting portion (141), and the first sealing portion (160) abuts against the second column portion (132) and the second limiting portion (141), and the second sealing portion (161) is disposed between the first limiting portion (140) and the second column portion (132), and the second sealing portion (161) abuts against the first limiting portion (140) and the second column portion (132).

9. The battery (1) according to claim 5, characterized in that Also includes: A second insulating member (17), wherein the second insulating member (17) comprises a third insulating portion (170) and a fourth insulating portion (171) which are connected to each other, wherein the third insulating portion (170) is disposed on a side of the top cover sheet (12) facing the electrode assembly (11), and the third insulating portion (170) covers the first limiting member (14), and at least a portion of the fourth insulating portion (171) is disposed between the first limiting portion (140) and the third column portion (133), and the fourth insulating portion (171) surrounds the third column portion (133).

10. The battery (1) according to any one of claims 1 to 9, characterized in that Part of the first insulating member (15) is embedded in the limiting groove (142); one of the first insulating member (15) and the first limiting member (14) is provided with a third protrusion (154), and the other is provided with a third groove (143) for the third protrusion (154) to be embedded.

11. A battery pack, characterized in that: Comprising a battery (1) as claimed in any one of claims 1 to 10.

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