Cover plate module and battery

Abstract

The utility model relates to a cover plate module and a battery, and the cover plate module comprises a cover plate assembly which is provided with a first clamping piece and two first mounting holes; the connecting piece is clamped with the first clamping piece, two second mounting holes are formed in the connecting piece, and the connecting piece is used for being electrically conducted with the tabs of the battery cell; the two pole columns, the first mounting holes and the second mounting holes are in one-to-one correspondence, each pole column is clamped in the corresponding first mounting hole and the corresponding second mounting hole at the same time, and the pole columns and the connecting pieces abut against each other and can be electrically conducted. According to the cover plate module, through the clamping design, the stability among the cover plate assembly, the connecting piece and the pole is ensured, looseness caused by vibration or collision is reduced, meanwhile, through cooperation between the connecting piece and the pole, effective transmission of current can be ensured, the performance and efficiency of a battery are improved, and in addition, the service life of the battery is prolonged. And due to the overall structure arrangement of the cover plate module, the difficulty of installation and replacement of all parts is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cover module and a battery. Background Art

[0002] In the prior art, the common external structure of a prismatic battery consists of side panels, positive and negative electrode connectors, positive and negative electrode covers, and an aluminum shell. These are typically connected to the electrodes via welding rings through injection molding, and sealed and insulated by sealing rings in a jig during welding.

[0003] The above-mentioned square shell battery structure requires complex non-standard equipment and tooling for welding during assembly to achieve sealing performance. At the same time, it lacks consideration of the pass rate during the battery assembly process and the difficulty of battery disassembly. Utility Model Content

[0004] The present application provides a cover plate module to solve the problem that welding is required during the assembly process of the cover plate assembly, which increases the difficulty of assembly.

[0005] The cover module according to the present application is used for a battery and includes:

[0006] A cover plate assembly, wherein the cover plate assembly is provided with a first clamping member and two first mounting holes;

[0007] A connecting piece, the connecting piece being clamped to the first clamping member, the connecting piece being provided with two second mounting holes, and the connecting piece being used for electrically conducting with the tab of the battery cell;

[0008] Two poles, the first mounting holes and the second mounting holes correspond one to one, each pole is simultaneously clamped in the first mounting hole and the second mounting hole, and the pole and the connecting piece are in contact and electrically conductive.

[0009] According to the cover plate module of the present application, the pole includes a column body, the column body is inserted into the first mounting hole and the second mounting hole, and a first limiting portion is provided on the column body, which abuts against the side of the connecting piece facing away from the cover plate assembly.

[0010] Optionally, a second limiting portion is further provided on the column body, and the second limiting portion and the first limiting portion are arranged in sequence and spaced apart along the axial direction of the column body, and the second limiting portion abuts against a side of the cover plate assembly away from the connecting piece.

[0011] Optionally, the cover assembly includes a bendable second clamping member, and the second clamping member is used to clamp with the outer shell of the battery.

[0012] Optionally, the second clamping member is in the shape of a thin sheet, and the second clamping member is enclosed along the circumferential direction of the cover plate assembly and extends in a direction perpendicular to the cover plate assembly and away from the connecting piece.

[0013] According to the cover plate module of the present application, the cover plate assembly includes a first cover plate and a second cover plate that are clamped to each other, the first mounting hole passes through the first cover plate and the second cover plate, the second cover plate is clamped between the connecting piece and the first cover plate, the first clamping piece is provided on the second cover plate, and the second clamping piece is provided on the first cover plate.

[0014] Optionally, the second clamping member is in the shape of a thin sheet, and the second clamping member is enclosed along the circumferential direction of the first cover plate and extends in a direction perpendicular to the first cover plate and away from the second cover plate.

[0015] According to the cover plate module of the present application, the second mounting hole extends along the length direction of the connecting piece and passes through the edge of the connecting piece.

[0016] Optionally, the cover module further includes:

[0017] The sealing member includes a first sub-portion and a second sub-portion connected to each other, the first sub-portion is clamped between the second limiting portion and the cover plate assembly, and the second sub-portion is clamped between the inner wall of the first mounting hole and the pole.

[0018] Optionally, the sealing member further includes a third sub-portion, wherein the third sub-portion is connected to the first sub-portion and wrapped around the outer peripheral wall of the second limiting portion.

[0019] The battery according to the present application includes the above-mentioned cover module, battery cell and shell. The cover module and the shell are snap-fitted and jointly define an installation cavity, and the battery cell is arranged in the installation cavity.

[0020] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0021] In the cover plate module provided in the embodiment of the present application, the connecting piece is connected to the cover plate assembly through the first clamping member, which can realize the positioning of the connecting piece and ensure the stability of the position of the connecting piece. The two second mounting holes on the connecting piece correspond to the two first mounting holes on the cover plate assembly respectively. The pole is clamped in the first mounting hole and the second mounting hole. On the one hand, it can further realize the enhancement of the connection and fixing effect between the connecting piece and the cover plate assembly. At the same time, the pole can realize contact with the connecting piece to realize electrical conduction. When the cover plate module is assembled in the battery, the connecting piece can contact the pole ear of the battery cell. This enables the conduction of current, and further realizes the electrical conduction of the pole and the lug, and the pole can also improve the stability of the connection of the pole by corresponding installation with the first mounting hole and the second mounting hole. In this way, the stability between the cover assembly, the connecting piece and the pole is ensured through the snap-on design, and the loosening caused by vibration or collision is reduced. At the same time, the cooperation between the connecting piece and the pole can ensure the effective transmission of current and improve the performance and efficiency of the battery. In addition, the overall structural setting of the cover module reduces the difficulty of installation and replacement between the various components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0025] Figure 1 An exploded view of a cover module provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 A side view of a pole of a cover module provided in an embodiment of the present application.

[0028] Description of reference numerals:

[0029] Cover plate assembly 10, first clamping member 11, first mounting hole 12, second clamping member 13, first cover plate 14, second cover plate 15, second clamping groove 151, explosion-proof valve 16, injection hole 17, connecting piece 20, second mounting hole 21, first clamping groove 22, pole 30, column body 31, first limiting portion 32, second limiting portion 33, sealing member 40, first sub-portion 41, second sub-portion 42, third sub-portion 43. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0032] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0033] like Figure 1 As shown, the cover plate module according to an embodiment of the present application is used for a battery and includes a cover plate assembly 10 , a connecting piece 20 and two poles 30 .

[0034] Specifically, the cover plate assembly 10 is provided with a first clamping piece 11 and two first mounting holes 12; the connecting piece 20 is clamped with the first clamping piece 11, and two second mounting holes 21 are provided on the connecting piece 20, and the connecting piece 20 is used to electrically conduct with the pole tab of the battery cell; the first mounting hole 12 and the second mounting hole 21 correspond one to one, and each pole 30 is clamped in the first mounting hole 12 and the second mounting hole 21 at the same time, and the pole 30 and the connecting piece 20 are in contact and can be electrically conductive.

[0035] In detail, the connecting piece 20 is connected to the cover assembly 10 through the first clamping piece 11, which can realize the positioning of the connecting piece 20 and ensure the position stability of the connecting piece 20. The two second mounting holes 21 on the connecting piece 20 correspond to the two first mounting holes 12 on the cover assembly 10 respectively. The pole 30 is clamped in the first mounting hole 12 and the second mounting hole 21. On the one hand, it can further realize the enhancement of the connection and fixing effect between the connecting piece 20 and the cover assembly 10. At the same time, the pole 30 can realize contact with the connecting piece 20 to achieve electrical conduction. When the cover module is assembled in the battery, the connecting piece 20 can contact with the pole ear of the battery cell to achieve current conduction, thereby achieving electrical conduction between the pole 30 and the pole ear. The pole 30 can also achieve the improvement of the stability of the connection of the pole 30 by corresponding installation with the first mounting hole 12 and the second mounting hole 21.

[0036] Among them, one of the two poles 30 is a positive pole 30 and the other is a negative pole 30 . The first mounting hole 12 can be set as a circular hole, a slotted hole, a square hole, a polygonal hole, etc., and the second mounting hole 21 can be set as a circular hole, a slotted hole, a square hole, a polygonal hole, etc. The shapes of the first mounting hole 12 and the second mounting hole 21 can be the same or different and can be set as needed. Among them, when the first mounting hole 12 is set as a square hole, it can increase the contact area with the pole 30, thereby increasing the friction, so that the friction between the first mounting hole 12 and the pole 30 is increased, thereby improving stability and avoiding shaking; when the second mounting hole 21 is set as a square hole, it can increase the contact area with the pole 30, thereby increasing the friction, so that the friction between the second mounting hole 21 and the pole 30 is increased, thereby improving stability and avoiding shaking; when both the first mounting hole 12 and the second mounting hole 21 are set as square holes, they can increase the contact area with the pole 30, thereby increasing the friction, so that the friction between the first mounting hole 12 and the pole 30 and between the second mounting hole 21 and the pole 30 is increased, thereby improving stability and avoiding shaking.

[0037] The structure of the first clamping member 11 can be of various types. For example, the first clamping member 11 is configured as a pin type, the first clamping member 11 is in the shape of a protruding plate, a first clamping groove 22 is provided on the connecting piece 20, and the first clamping member 11 is inserted into the first clamping groove 22; the first clamping member 11 is configured as a slot type, which is a U-shaped or V-shaped groove, and the connecting piece 20 is embedded therein; the first clamping member 11 is a concave-convex structure, a concave-convex structure is provided on the connecting member, and the two concave-convex structures are clamped to each other.

[0038] According to the cover module of the embodiment of the present application, the stability between the cover assembly 10, the connecting piece 20 and the pole 30 is ensured through the clip-on design, and the loosening caused by vibration or collision is reduced. At the same time, the cooperation between the connecting piece 20 and the pole 30 can ensure the effective transmission of current, thereby improving the performance and efficiency of the battery. In addition, the overall structural setting of the cover module reduces the difficulty of installation and replacement between the various components.

[0039] like Figure 1 As shown, in some embodiments, the cover plate assembly 10 includes an explosion-proof valve 16 and a liquid injection hole 17 .

[0040] like Figure 2 and Figure 3 As shown, according to the cover module of an embodiment of the present application, the pole 30 includes a column body 31, which is passed through the first mounting hole 12 and the second mounting hole 21, and a first limiting portion 32 is provided on the column body 31, which abuts against the side of the connecting piece 20 facing away from the cover assembly 10.

[0041] In detail, by setting the first limiting portion 32, the contact area between the connecting piece 20 and the pole 30 can be increased, which helps to improve the current flow efficiency and reduce the resistance during current transmission, thereby improving the performance of the battery. At the same time, such a setting can accurately locate the relative position of the column body 31 and the connecting piece 20, thereby improving the connection stability between the pole 30 and the connecting piece 20.

[0042] The shape of the first limiting portion 32 includes but is not limited to a protruding flange, a step, a cone or a conical shape, a spring-shaped shape, a polygonal shape, and the like.

[0043] like Figure 2 and Figure 3 As shown, in some embodiments, a second limiting portion 33 is further provided on the column body 31, and the second limiting portion 33 and the first limiting portion 32 are arranged in sequence along the axial direction of the column body 31, and the second limiting portion 33 abuts against the side of the cover plate assembly 10 facing away from the connecting piece 20.

[0044] In the above embodiment, by providing the second limiting portion 33, the contact area between the pole 30 and the cover plate assembly 10 can be increased, thereby improving the stability of the assembly between the two, preventing the pole 30 from falling off or shifting due to external force, and ensuring the circuit safety of the battery. At the same time, the second limiting portion 33 allows the pole 30 to be evenly distributed with force during operation, avoiding damage or failure of the pole 30 due to stress concentration.

[0045] The shape of the second limiting portion 33 includes but is not limited to a protruding flange, a step, a cone or a conical shape, a spring-shaped shape, a polygonal shape, and the like.

[0046] In some embodiments, the first limiting portion 32 extends along the circumferential direction of the column body 31 , and the second limiting portion 33 extends along the circumferential direction of the column body 31 .

[0047] Specifically, the first limiting portion 32 is arranged to extend along the circumferential direction of the column body 31, thereby increasing the contact area between the first limiting portion 32 and the connecting piece 20, and further increasing the contact area between the connecting piece 20 and the terminal 30, thereby helping to improve the efficiency of current flow and reduce the resistance during current transmission, thereby improving battery performance. At the same time, this arrangement can accurately locate the relative position of the column body 31 and the connecting piece 20, and improve the connection stability between the terminal 30 and the connecting piece 20. The second limiting portion 33 is arranged to extend along the circumferential direction of the column body 31, further increasing the contact area between the terminal 30 and the cover plate assembly 10, thereby improving the assembly stability between the two, preventing the terminal 30 from falling off or shifting due to external forces, and ensuring the circuit safety of the battery. At the same time, the second limiting portion 33 ensures that the force applied to the terminal 30 is evenly distributed during operation, preventing damage or failure of the terminal 30 due to stress concentration.

[0048] In some embodiments, the cover assembly 10 includes a bendable second clamping member 13 , and the second clamping member 13 is used to clamp with the battery housing.

[0049] In the above-mentioned embodiment, the second clip 13 is connected to the battery shell, which can simplify the assembly process and difficulty between the cover module and the battery shell, reduce the use of other fasteners or welding, simplify the design of the overall structure, and facilitate later disassembly. The second clip 13 is bendable, which can make the second clip 13 more flexible during installation and disassembly, and facilitate maintenance and replacement.

[0050] like Figure 1 As shown, in some embodiments, the second clip 13 is in the shape of a thin sheet, and the second clip 13 is enclosed along the circumferential direction of the cover assembly 10 and extends in a direction perpendicular to the cover assembly 10 and away from the connecting piece 20 .

[0051] In detail, the second clip 13 is in the shape of a thin sheet, which can enhance the ease of bending and deforming of the second clip 13 on the one hand, and effectively reduce the overall weight of the cover module on the other hand. At the same time, the second clip 13 is circumferentially enclosed along the cover assembly 10, which can increase the area of engagement with the shell when assembled with the shell, thereby improving the reliability of assembly of the cover module and the shell, enhancing the sealing of the connection between the cover module and the shell, and reducing the risk of air leakage or liquid leakage. In addition, when the cover module and the shell are assembled, the second clip 13 is bent and changed to bend in the direction close to the connector. Therefore, it is set to extend in a direction perpendicular to the cover assembly 10 and away from the connecting piece 20, which can reduce the difficulty of assembly with the shell and improve assembly efficiency.

[0052] like Figure 1 As shown, according to the cover module of the embodiment of the present application, the cover assembly 10 includes a first cover 14 and a second cover 15 that are clamped to each other, the first mounting hole 12 passes through the first cover 14 and the second cover 15, the second cover 15 is clamped between the connecting piece 20 and the first cover 14, the second cover 15 is provided with a first clamping member 11, and the first cover 14 is provided with a second clamping member 13.

[0053] In the above embodiment, the first cover plate 14 and the second cover plate 15 are manufactured separately, which can reduce the processing difficulty and the manufacturing difficulty, thereby reducing the manufacturing cost.

[0054] In a specific embodiment, a clamping column is provided on the first cover plate 14, and a second clamping groove 151 is provided on the second cover plate 15. The clamping column is clamped in the second clamping groove 151. The clamping column and the second clamping groove 151 correspond one to one, and there can be one or more of each. When there are multiple second clamping grooves 151, the multiple second clamping grooves 151 are distributed at intervals along the circumference of the second cover plate 15.

[0055] In some embodiments, the second clamping member 13 is in the shape of a thin sheet. The second clamping member 13 is enclosed along the circumferential direction of the first cover plate 14 and extends in a direction perpendicular to the first cover plate 14 and away from the second cover plate 15 .

[0056] In a specific embodiment, the second clamping member 13 and the first cover plate 14 are integrally formed and formed by stamping the second clamping member 13 and the first cover plate 14. In this case, the second cover plate 15 and the first cover plate 14 are detachably connected, which can reduce the difficulty of manufacturing the cover plate assembly 10 while utilizing the second cover plate 15 to enhance the structural strength of the first cover plate 14.

[0057] like Figure 1As shown, according to the cover module of the embodiment of the present application, the second mounting hole 21 extends along the length direction of the connecting piece 20 and passes through the edge of the connecting piece 20. In this way, when assembling the cover assembly 10, the pole 30 and the connector, the pole 30 is first inserted into the cover assembly 10, and then the second mounting hole 21 of the connecting piece 20 is aligned with the pole 30. The connecting piece 20 is gradually pushed along the pole 30 so that the pole 30 is stuck in the second mounting hole 21 and assembled into place. During this process, the first limiting portion 32 is always located on the side of the connecting piece 20 away from the cover assembly 10. Therefore, it can be seen that the second mounting hole 21 extends along the length direction of the connecting piece 20 and passes through the edge of the connecting piece 20, which can reduce the difficulty of assembling the connecting piece 20 and the pole 30.

[0058] like Figure 1 and Figure 2 As shown, in some embodiments, the cover module also includes a seal 40, which includes a first sub-section 41 and a second sub-section 42 that are connected to each other, the first sub-section 41 is clamped between the second limiting portion 33 and the cover assembly 10, and the second sub-section 42 is clamped between the inner wall of the first mounting hole 12 and the pole 30.

[0059] It can be understood that the first sub-section 41 can seal the gap between the second limiting portion 33 and the upper surface of the cover assembly 10, and at the same time can achieve electrical isolation between the pole 30 and the cover assembly 10. When the cover assembly 10 includes the first cover 14 and the second cover 15, that is, the gap between the first cover 14 and the second limiting portion 33, the second sub-section 42 can seal the gap between the inner wall of the first mounting hole 12 and the pole 30, thereby achieving double sealing in the horizontal and vertical directions, and improving the sealing and reliability of the cover module.

[0060] The first sub-section 41 and the second sub-section 42 are integrally formed.

[0061] like Figure 1 and Figure 2 As shown, in some embodiments, the sealing member 40 further includes a third sub-portion 43 , which is connected to the first sub-portion 41 and wrapped around the outer peripheral wall of the second limiting portion 33 .

[0062] In the above embodiment, by providing the third sub-section 43, the sealing effect of the seal 40 on the cover module can be further improved, and the pole 30 and the first cover 14 can be electrically isolated, thereby further improving the stability and reliability of the cover module, thereby extending the service life of the cover module.

[0063] The battery according to the present application includes the above-mentioned cover module, battery cell and shell. The cover module and the shell are snap-fitted and jointly define an installation cavity, and the battery cell is arranged in the installation cavity.

[0064] According to the battery of the embodiment of the present application, the welding frequency during assembly between the cover module and the outer shell is reduced, and the problem of poor welding around the cover module and the outer shell caused by improper manual placement, poor fixture accuracy, unstable welding power and other problems is reduced, further reducing the number of battery repair welding times, which can save energy consumption. When disassembling the battery, a can cutter similar to a can cutter can be used to cut the edge of the cover module to remove the battery from the installation cavity, which not only reduces the difficulty of disassembly during later battery recycling, but also reduces the generation of metal debris during the disassembly process, thereby facilitating metal recycling.

[0065] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an", and "" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain", and "have" are inclusive and therefore specify the presence of the stated features, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0066] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0067] The above are merely specific embodiments of the present invention, intended to enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A cover module for a battery, characterized in that: include: A cover plate assembly, wherein the cover plate assembly is provided with a first clamping member and two first mounting holes; A connecting piece, the connecting piece being clamped to the first clamping member, the connecting piece being provided with two second mounting holes, and the connecting piece being used for electrically conducting with the tab of the battery cell; Two poles, the first mounting holes and the second mounting holes correspond one to one, each pole is simultaneously clamped in the first mounting hole and the second mounting hole, and the pole and the connecting piece are in contact and electrically conductive.

2. The cover plate module according to claim 1, characterized in that: The pole includes a column body, which is inserted into the first mounting hole and the second mounting hole. A first limiting portion is provided on the column body, which abuts against a side of the connecting piece away from the cover assembly.

3. The cover plate module according to claim 2, characterized in that: The column body is further provided with a second limiting portion, which is spaced apart from the first limiting portion in sequence along the axial direction of the column body, and the second limiting portion abuts against a side of the cover plate assembly away from the connecting piece.

4. The cover plate module according to any one of claims 1 to 3, characterized in that: The cover assembly includes a bendable second clamping member, and the second clamping member is used to be clamped with the outer shell of the battery.

5. The cover plate module according to claim 4, characterized in that: The second clamping member is in the shape of a thin sheet, and is enclosed along the circumferential direction of the cover plate assembly and extends in a direction perpendicular to the cover plate assembly and away from the connecting piece.

6. The cover plate module according to claim 4, characterized in that: The cover plate assembly includes a first cover plate and a second cover plate that are clamped together, the first mounting hole passes through the first cover plate and the second cover plate, the second cover plate is clamped between the connecting piece and the first cover plate, the first clamping piece is provided on the second cover plate, and the second clamping piece is provided on the first cover plate.

7. The cover plate module according to any one of claims 1 to 3, characterized in that: The second mounting hole extends along the length direction of the connecting piece and passes through the edge of the connecting piece.

8. The cover plate module according to claim 3, characterized in that: Also includes: The sealing member includes a first sub-portion and a second sub-portion connected to each other, the first sub-portion is clamped between the second limiting portion and the cover plate assembly, and the second sub-portion is clamped between the inner wall of the first mounting hole and the pole.

9. The cover plate module according to claim 8, characterized in that: The sealing member further includes a third sub-portion, which is connected to the first sub-portion and wrapped around the outer peripheral wall of the second limiting portion.

10. A battery, characterized in that: It comprises the cover module, battery cell and shell according to any one of claims 1 to 9, wherein the cover module and the shell are snap-fitted and jointly define an installation cavity, and the battery cell is arranged in the installation cavity.

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