Cover plate assembly and battery

Abstract

The utility model provides a cover plate assembly and a battery, and relates to the technical field of batteries, the battery comprises the cover plate assembly, the cover plate assembly comprises a cover plate, an insulating part, a conductive part and an adapter piece, along the thickness direction of the cover plate, the insulating part is connected to one side surface of the cover plate; a first groove is formed in the insulating part, and a notch of the first groove is located in the surface of the side, away from the cover plate, of the insulating part; at least part of the switching piece is located in the first groove; at least part of the conductive piece penetrates through the cover plate and the insulating piece and is electrically connected with the switching piece. According to the cover plate assembly and the battery provided by the invention, the battery cell mounting space in the battery can be expanded, so that the requirement on the energy density of the battery cell can be met.

Description

Technical Field

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

[0002] Lithium-ion batteries are commonly used in new energy vehicles. With the rapid development of lithium-ion battery technology, people have also put forward higher requirements on the energy density of lithium-ion batteries. The installation space of battery cells inside the battery has a crucial impact on the energy density of the battery.

[0003] The existing battery comprises a shell, a battery cell and a cover assembly. The battery cell is located inside the shell, and the cover assembly is connected to the shell to play a sealing and connecting role. The shape and structure of the cover assembly will affect the size of the space inside the battery.

[0004] However, the existing battery has a small internal cell installation space, and the cell energy density is difficult to improve, thus failing to meet usage requirements. Utility Model Content

[0005] In view of the above problems, the present application provides a cover plate assembly and a battery, which can expand the battery cell installation space inside the battery, thereby meeting the demand for battery cell energy density.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The first aspect of the present application provides a cover plate assembly, comprising a cover plate, an insulating member, a conductive member and a transfer plate, wherein the insulating member is connected to a side surface of the cover plate along a thickness direction of the cover plate;

[0008] The insulating member is provided with a first groove, the notch of the first groove is located on a side surface of the insulating member away from the cover plate; at least part of the adapter is located in the first groove;

[0009] At least part of the conductive member is inserted into the cover plate and the insulating member and is electrically connected to the adapter.

[0010] The beneficial effect of the present application is that when the cover plate assembly is installed on the battery shell, since at least part of the adapter plate is located in the first groove, the occupation of the internal space of the shell by the adapter plate is reduced, thereby expanding the battery cell installation space inside the battery, effectively increasing the battery cell energy density, and meeting the battery cell energy density requirements.

[0011] In a possible implementation, a first boss is further provided on the insulating member, and the first boss protrudes from a side surface of the insulating member facing the cover plate; along the thickness direction of the cover plate, the first boss and the first groove are adjacently arranged; a second boss and a second groove are provided on the cover plate, and the notch of the second groove is located on the side surface of the cover plate facing the insulating member, and the second boss protrudes from a side surface of the cover plate away from the insulating member, and along the thickness direction of the cover plate, the second boss and the second groove are adjacently arranged; at least part of the first boss is located in the second groove.

[0012] In a possible implementation, the shapes of the first boss and the second groove are adapted to each other, all of the first bosses are located in the second groove, and the first bosses abut against the bottom surface of the second groove.

[0013] In a possible implementation manner, the shape of the adapter plate is adapted to the shape of the first groove, and a portion of the adapter plate is located in the first groove and abuts against the bottom surface of the first groove.

[0014] In a possible implementation, at least one of the cover plate and the insulating member is a nano-injection molded part;

[0015] and / or, the first boss and the first groove are formed by a stamping process;

[0016] And / or, the second boss and the second groove are formed by a stamping process.

[0017] In a possible implementation, along the thickness direction of the cover plate, the orthographic projection of the first boss on the insulating member covers the orthographic projection of the first groove on the insulating member.

[0018] In a possible implementation, along the thickness direction of the cover plate, the orthographic projection of the second boss on the cover plate covers the orthographic projection of the second groove on the cover plate.

[0019] In a possible implementation, a first through hole is further provided on the insulating member, and a second through hole is provided on the cover plate; along the thickness direction of the cover plate, the first through hole passes through the first boss and is connected to the first groove, and the second through hole passes through the cover plate; the conductive member is passed through the first through hole and the second through hole and abuts against the adapter plate.

[0020] In a possible implementation manner, the first through hole and the second through hole are concentrically arranged, and along the thickness direction of the cover plate, the orthographic projection of the second through hole on the cover plate covers the first through hole.

[0021] In a possible implementation, the cover plate assembly also includes a connector, which is connected to the cover plate and passes through the first through hole and the second through hole; a connecting through hole is provided on the connector, and the connecting through hole passes through the connector; and some conductive parts are inserted in the connecting through holes.

[0022] In a possible implementation, an annular groove is provided on the connecting member, and the annular groove is arranged around the connecting through hole; the cover plate located at the edge of the second through hole is inserted into the annular groove.

[0023] A second aspect of the present application provides a battery, comprising a shell, a battery cell and a cover assembly in any of the above-mentioned implementation methods, the battery cell is arranged in a receiving cavity inside the shell, and the cover assembly is connected to the shell; the insulating part and the adapter plate of the cover assembly are located in the receiving cavity, and the adapter plate is electrically connected to the battery cell.

[0024] When the cover plate assembly provided by the present application is installed on the battery housing, since at least part of the adapter sheet is located in the first groove, the occupation of the internal space of the housing by the adapter sheet is reduced, so that more space inside the housing can be saved for installing the battery cells, thereby expanding the battery cell installation space inside the battery, effectively increasing the battery cell energy density, and meeting the demand for battery cell energy density. In addition, when designing the cover plate assembly of the present application, a larger adapter sheet can be selected to improve the conductivity of the battery at the adapter sheet.

[0025] The structure of the present application and its other inventive objectives and beneficial effects will be more clearly understood through the description of the specific implementation methods in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A three-dimensional diagram of a battery provided in an embodiment of the present application;

[0028] Figure 2 An exploded view of a battery provided in an embodiment of the present application;

[0029] Figure 3 A three-dimensional diagram of a cover plate assembly provided in an embodiment of the present application;

[0030] Figure 4 A top view of a cover plate assembly provided in an embodiment of the present application;

[0031] Figure 5 for Figure 4 Sectional view at AA in the middle;

[0032] Figure 6 for Figure 5 Enlarged view at center C;

[0033] Figure 7 for Figure 4 The cross-sectional view at the middle BB is rotated 90 degrees to the right;

[0034] Figure 8 for Figure 3 An exploded view of the cover assembly in FIG.

[0035] Fig. 9 An exploded view of the cover plate assembly provided in an embodiment of the present application from another perspective;

[0036] Fig.10 It is an assembly drawing between the conductive parts, the adapter and the connecting parts;

[0037] Fig.11 This is an exploded view of the conductive parts, adapters, and connectors.

[0038] Description of reference numerals:

[0039] 100-cover plate assembly; 110-cover plate;

[0040] 111 - second groove; 112 - second boss;

[0041] 113 - second through hole; 120 - insulating member;

[0042] 121-first groove; 122-first boss;

[0043] 123-first through hole; 124-abutting portion;

[0044] 125-filter grid; 130-conductive member;

[0045] 131-a first conductive block; 132-a second conductive block;

[0046] 140-adapter; 150-connector;

[0047] 151-connecting through hole; 152-annular groove;

[0048] 160-explosion-proof valve; 200-housing;

[0049] 300-battery cells. DETAILED DESCRIPTION

[0050] In the prior art, lithium-ion batteries used in new energy vehicles have a shell, a battery cell, and a cover assembly. The battery cell is located inside the shell, and the cover assembly is connected to the shell to seal and connect. The shape and structure of the cover assembly will affect the size of the space inside the battery. Without changing the overall size of the battery, the larger the space inside the battery, the greater the battery cell energy density. However, the existing battery has a small internal space, which makes it difficult to meet the demand for higher battery cell energy density.

[0051] Based on the above problems, the present application provides a cover plate assembly and a battery. The battery has a cover plate assembly. The cover plate assembly provided by the present application includes a cover plate, an insulating member, a conductive member and an adapter. Along the thickness direction of the cover plate, the insulating member is connected to one side surface of the cover plate; a first groove is provided on the insulating member, and the notch of the first groove is located on the side surface of the insulating member away from the cover plate; at least part of the adapter is located in the first groove; in addition, at least part of the conductive member is inserted into the cover plate and the insulating member, and is electrically connected to the adapter. Therefore, when the cover plate assembly is installed on the battery shell, since at least part of the adapter is located in the first groove, the occupation of the adapter in the internal space of the shell is reduced, so that the battery cell installation space inside the battery can be expanded, and the battery cell energy density of the battery is effectively increased to meet the demand for battery cell energy density.

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0054] The following combination Figures 1 to 11 , the structure of the cover plate assembly and the battery provided in the embodiment of the present application is described in detail.

[0055] like Figures 3 to 11 As shown, the cover plate assembly 100 provided in the present application includes a cover plate 110, an insulating member 120, a conductive member 130 and a transfer plate 140. Along the thickness direction of the cover plate 110, the insulating member 120 is connected to a surface of one side of the cover plate 110; after the insulating member 120 is connected to one side of the cover plate 110, the insulating member 120 can play a role of isolation and insulation. It should be noted that, as Figure 1 and Figure 2 As shown, when the cover plate assembly 100 is installed on the battery shell 200, the insulating member 120 is located inside the shell 200, and the insulating member 120 can abut the battery cell 300 inside the shell 200, so that the battery cell 300 is compressed inside the shell 200 and will not loosen; at the same time, the insulating member 120 is located between the cover plate 110 and the battery cell 300, and the insulating member 120 keeps the cover plate 110 and the battery cell 300 isolated and insulated.

[0056] like Figure 7 and Fig. 9 As shown, the insulating member 120 is provided with a first groove 121, and the notch of the first groove 121 is located on the side surface of the insulating member 120 away from the cover plate 110; at least part of the adapter sheet 140 is located in the first groove 121, and the first groove 121 can play a role in accommodating the adapter sheet 140. Therefore, when the cover plate assembly 100 is installed on the battery shell 200, since at least part of the adapter sheet 140 is located in the first groove 121, the space occupied by the adapter sheet 140 inside the shell 200 for installing the battery cell 300 is reduced, so that more space inside the shell 200 can be saved for installing the battery cell 300.

[0057] In addition, if Figure 6 and Figure 7 As shown, at least part of the conductive member 130 is inserted into the cover plate 110 and the insulating member 120, and is electrically connected to the adapter 140. Thus, when the cover plate assembly 100 is mounted on the battery housing 200, the conductive member 130 can be electrically connected to the battery cell 300 through the adapter 140; specifically, two conductive members 130 are provided on the cover plate assembly 100, and the positive and negative electrodes of the battery are formed at the two conductive members 130, respectively.

[0058] Thus, when the cover assembly 100 provided by the present application is installed on the battery shell 200, since at least part of the adapter sheet 140 is located in the first groove 121, the occupation of the internal space of the shell 200 by the adapter sheet 140 is reduced, so that more space can be saved inside the shell 200 for installing the battery cell 300, thereby expanding the battery cell installation space inside the battery, effectively increasing the battery cell energy density, and meeting the demand for battery cell energy density. In addition, when designing the cover assembly 100 of the present application, a larger-sized adapter sheet 140 can be selected to improve the conductivity of the battery at the adapter sheet 140; it should be noted that since the adapter sheet 140 can be hidden in the first groove 121, the larger-sized adapter sheet 140 will not have a significant impact on the battery cell installation space inside the battery.

[0059] It should be noted that the insulating member 120 can be a plate member, and the plate surface of the insulating member 120 is in contact with the plate surface of the cover plate 110; in addition, the conductive member 130 is a conductive column, and the conductive member 130 includes a first conductive block 131 and a second conductive block 132 that are connected to each other; one of the first conductive block 131 and the second conductive block 132 is a copper block, and the other is an aluminum block, so that the conductive member 130 is a copper-aluminum composite material member, and the conductive performance of the conductive member 130 is improved.

[0060] In some embodiments, Figure 8 and Fig. 9 As shown, the insulating member 120 is further provided with a first boss 122, which protrudes from a side surface of the insulating member 120 facing the cover plate 110; the first boss 122 and the first groove 121 are adjacently arranged along the thickness direction of the cover plate 110. Since the first groove 121 is recessed in a side surface of the insulating member 120, the first boss 122 protrudes from a side surface of the insulating member 120, and the first boss 122 and the first groove 121 are adjacently arranged, the existence of the first boss 122 ensures the overall strength of the insulating member 120 at the first groove 121.

[0061] Further, such as Figure 8 and Fig. 9 As shown, the cover plate 110 is provided with a second boss 112 and a second groove 111. The notch of the second groove 111 is located on the side surface of the cover plate 110 facing the insulating member 120. The second boss 112 protrudes from the side surface of the cover plate 110 away from the insulating member 120. Along the thickness direction of the cover plate 110, the second boss 112 and the second groove 111 are arranged adjacent to each other. Since the second groove 111 is recessed in the side surface of the cover plate 110, the second boss 112 protrudes from the side surface of the cover plate 110, and the second boss 112 and the second groove 111 are arranged adjacent to each other, the existence of the second boss 112 ensures the overall strength of the cover plate 110 at the second groove 111. In addition, at least part of the first boss 122 is located in the second groove 111; the second groove 111 can avoid and accommodate the first boss 122, so that the first boss 122 protruding from the side surface of the insulating member 120 will not affect the connection of the insulating member 120 to the cover plate 110.

[0062] Specifically, Figures 5 to 7As shown, the shapes of the first boss 122 and the second groove 111 are adapted to each other. For example, when the first boss 122 is a rectangular boss, the second groove 111 is a rectangular groove. In addition, the entire first boss 122 is located in the second groove 111, and the first boss 122 abuts against the bottom surface of the second groove 111; the bottom surface of the second groove 111 can play a limiting role, which facilitates the connection of the insulating member 120 to the cover plate 110. It should be noted that the first boss 122 can also be partially located in the second groove 111.

[0063] Specifically, Figure 6 and Figure 7 As shown, the shape of the adapter 140 is adapted to the shape of the first groove 121. For example, when the adapter 140 is rectangular, the first groove 121 is a rectangular groove. In addition, part of the adapter 140 is located in the first groove 121 and abuts against the bottom surface of the first groove 121; the bottom surface of the first groove 121 can play a role in limiting, so that the adapter 140 is conveniently connected to the insulating member 120. It should be noted that the adapter 140 can be completely located in the first groove 121.

[0064] Exemplarily, at least one of the cover plate 110 and the insulating member 120 is a nano-injection molded part; specifically, both the cover plate 110 and the insulating member 120 can be nano-injection molded parts, which have the advantage of high strength.

[0065] Exemplarily, the first boss 122 and the first groove 121 may be formed by a stamping process. By stamping the insulating member 120 , the first boss 122 and the first groove 121 may be simultaneously formed at the stamping location, which facilitates the formation of the first boss 122 and the first groove 121 .

[0066] Exemplarily, the second boss 112 and the second groove 111 may be formed by a stamping process. By stamping the cover plate 110 , the second boss 112 and the second groove 111 may be simultaneously formed at the stamping location, which facilitates the formation of the second boss 112 and the second groove 111 .

[0067] For example, Figure 8 and Fig. 9 As shown, along the thickness direction of the cover plate 110, the orthographic projection of the first boss 122 on the insulating member 120 covers the orthographic projection of the first groove 121 on the insulating member 120; thus, the thickness of the insulating member 120 at the first groove 121 can be guaranteed, thereby improving the overall strength of the insulating member 120 at the first groove 121.

[0068] In addition, along the thickness direction of the cover plate 110, the orthographic projection of the second boss 112 on the cover plate 110 covers the orthographic projection of the second groove 111 on the cover plate 110. Therefore, the thickness of the cover plate 110 at the second groove 111 can be guaranteed, and the overall strength of the cover plate 110 at the second groove 111 is improved.

[0069] In some embodiments, Figures 7 to 9 As shown, the insulating member 120 is further provided with a first through hole 123, and the cover plate 110 is provided with a second through hole 113; along the thickness direction of the cover plate 110, the first through hole 123 penetrates the first boss 122 and is connected to the first groove 121, and the second through hole 113 penetrates the cover plate 110; the conductive member 130 is inserted into the first through hole 123 and the second through hole 113 and abuts against the adapter 140. The existence of the first through hole 123 and the second through hole 113 facilitates the conductive member 130 to be inserted into the cover plate 110 and the insulating member 120 and to be electrically connected to the adapter 140.

[0070] Specifically, Figure 8 and Fig. 9 As shown, the first through hole 123 and the second through hole 113 are arranged concentrically, and along the thickness direction of the cover plate 110, the orthographic projection of the second through hole 113 on the cover plate 110 covers the first through hole 123. When the adapter plate 140 is located in the first groove 121, the first through hole 123 can expose the adapter plate 140, and the orthographic projection of the second through hole 113 on the cover plate 110 covers the first through hole 123, so that the conductive member 130 can abut against the adapter plate 140 after passing through the second through hole 113.

[0071] Further, such as Figure 7 As shown, the cover plate assembly 100 may further include a connector 150, which is connected to the cover plate 110 and is inserted into the first through hole 123 and the second through hole 113; the connector 150 is provided with a connecting through hole 151, which passes through the connector 150; and part of the conductive member 130 is inserted into the connecting through hole 151. In this way, the existence of the connector 150 facilitates the conductive member 130 to be connected to the housing 200 through the connector 150; in addition, the connector 150 can block the first through hole 123 and the second through hole 113 to ensure the sealing of the first through hole 123 and the second through hole 113. Specifically, the connector 150 may be an annular member, and the circumferential edge of the connector 150 is connected to the housing 200. Specifically, the conductive member 130 may be interference fit with the connector 150 in the connecting through hole 151.

[0072] Specifically, Figure 7 , Fig.10 as well as Fig.11As shown, the connecting member 150 is provided with an annular groove 152, which is arranged around the connecting through hole 151; the cover plate 110 located at the edge of the second through hole 113 is inserted into the annular groove 152. In this way, the existence of the annular groove 152 facilitates the connection between the connecting member 150 and the cover plate 110, and can ensure the sealing of the connection. In addition, the groove side walls on both sides of the annular groove 152 can respectively abut against the two side surfaces of the housing 200 along the thickness direction, further ensuring the sealing at the second through hole 113.

[0073] Based on the above embodiments, the present application also provides a battery, such as Figure 1 and Figure 2 As shown, the battery includes a shell 200, a battery cell 300, and a cover assembly 100 in any of the above embodiments. The battery cell 300 is arranged in a receiving cavity inside the shell 200, and the cover assembly 100 is connected to the shell 200; the insulating member 120 and the adapter 140 of the cover assembly 100 are located in the receiving cavity, and the adapter 140 is electrically connected to the battery cell 300. Since the insulating member 120 is located between the cover 110 and the battery cell 300, the insulating member 120 keeps the cover 110 and the battery cell 300 isolated and insulated. The conductive member 130 in the cover assembly 100 can be electrically connected to the battery cell 300 through the adapter 140; the two conductive members 130 in the cover assembly 100 respectively form the positive and negative electrodes of the battery.

[0074] In some embodiments, Figure 5 and Fig. 9 As shown, the insulating member 120 is provided with abutting portions 124, and the abutting portions 124 are used to abut against the battery core 300 inside the housing 200, so that the battery core 300 is compressed inside the housing 200 and does not become loose. Figure 4 and Figure 5 As shown, an explosion-proof valve 160 is provided on the cover plate 110, and a filter grid 125 is provided on the insulating member 120, and the explosion-proof valve 160 and the filter grid 125 are arranged opposite to each other; the explosion-proof valve 160 can play a protective role to prevent the pressure inside the battery from increasing and causing an explosion, and the filter grid 125 can play a filtering role to prevent larger objects inside the battery from being ejected from the explosion-proof valve 160.

[0075] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0076] The device or element referred to in this application or by implication must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this application. In the description of this application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0077] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cover plate assembly, characterized in that: It comprises a cover plate, an insulating member, a conductive member and a transfer plate, wherein the insulating member is connected to a side surface of the cover plate along the thickness direction of the cover plate; A first groove is provided on the insulating member, and the notch of the first groove is located on the side surface of the insulating member away from the cover plate; at least part of the adapter is located in the first groove; at least part of the conductive member is inserted through the cover plate and the insulating member, and is electrically connected to the adapter.

2. The cover plate assembly according to claim 1, characterized in that: The insulating member is further provided with a first boss, which protrudes from a surface of the insulating member facing the cover plate; along the thickness direction of the cover plate, the first boss and the first groove are adjacently arranged; A second boss and a second groove are provided on the cover plate, the notch of the second groove is located on a side surface of the cover plate facing the insulating member, the second boss protrudes from a side surface of the cover plate facing away from the insulating member, and along the thickness direction of the cover plate, the second boss and the second groove are adjacently arranged; at least part of the first boss is located in the second groove.

3. The cover plate assembly according to claim 2, characterized in that: The shapes of the first boss and the second groove are adapted to each other, the entire first boss is located in the second groove, and the first boss abuts against the bottom surface of the second groove; And / or, the shape of the adapter plate is adapted to the shape of the first groove, and part of the adapter plate is located in the first groove and abuts against the bottom surface of the first groove.

4. The cover plate assembly according to claim 2, characterized in that: At least one of the cover plate and the insulating member is a nano injection molded part; And / or, the first boss and the first groove are formed by a stamping process; And / or, the second boss and the second groove are formed by a stamping process.

5. The cover plate assembly according to claim 2, characterized in that: Along the thickness direction of the cover plate, the orthographic projection of the first boss on the insulating member covers the orthographic projection of the first groove on the insulating member; And / or, along the thickness direction of the cover plate, the orthographic projection of the second boss on the cover plate covers the orthographic projection of the second groove on the cover plate.

6. The cover plate assembly according to any one of claims 2 to 5, characterized in that: The insulating member is further provided with a first through hole, and the cover plate is provided with a second through hole; Along the thickness direction of the cover plate, the first through hole penetrates the first boss and is connected to the first groove, and the second through hole penetrates the cover plate; the conductive member is inserted into the first through hole and the second through hole and abuts against the adapter.

7. The cover plate assembly according to claim 6, characterized in that: The first through hole and the second through hole are concentrically arranged, and along the thickness direction of the cover plate, the orthographic projection of the second through hole on the cover plate covers the first through hole.

8. The cover plate assembly according to claim 6, characterized in that: It also includes a connecting piece, which is connected to the cover plate and penetrates the first through hole and the second through hole; The connecting member is provided with a connecting through hole, and the connecting through hole passes through the connecting member; part of the conductive member is inserted into the connecting through hole.

9. The cover plate assembly according to claim 8, characterized in that: An annular groove is provided on the connecting member, and the annular groove is arranged around the connecting through hole; the cover plate located at the edge of the second through hole is clamped in the annular groove.

10. A battery, characterized in that: It comprises a shell, a battery cell and a cover assembly as described in any one of claims 1 to 9, wherein the battery cell is arranged in a receiving cavity inside the shell, and the cover assembly is connected to the shell; the insulating part and the adapter plate of the cover assembly are located in the receiving cavity, and the adapter plate is electrically connected to the battery cell.

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