Battery cover plate assembly, battery, battery pack and electric device

Abstract

The application provides a battery cover plate assembly, a battery, a battery pack and an electric device. The battery cover plate assembly comprises a first connecting piece and a second connecting piece; the second connecting piece has a through hole, and part of the first connecting piece is located in the through hole; the outer side wall of the first connecting piece comprises a first inclined surface, the inner side wall of the through hole comprises a second inclined surface, and the first inclined surface and the second inclined surface are in limiting cooperation. The problems that the pole column has great machining and welding difficulty and poor reliability, and the stability of the battery cover plate assembly is poor and the service life of the battery is low are solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cover assembly, a battery, a battery pack, and an electrical device. Background Technology

[0002] A battery is a power source that provides power to tools, and often refers to the storage or rechargeable battery that powers electric vehicles, electric trains, electric bicycles, and golf carts.

[0003] Current batteries are generally composed of structural components such as a cover plate, a battery casing, and terminals; the cover plate is installed on the battery casing, and the terminals are installed on the cover plate.

[0004] In related technologies, the electrode post has the problems of high processing and welding difficulty and poor reliability, which leads to poor stability of the battery cover assembly and reduced battery life. Summary of the Invention

[0005] This application provides a battery cover assembly, a battery, a battery pack, and an electrical device, which can solve the problems of difficult processing and welding of the terminal post and poor reliability, resulting in poor stability of the battery cover assembly and reduced battery life.

[0006] The embodiments of this application provide the following technical solutions:

[0007] A first aspect of this application provides a battery cover assembly, the battery cover assembly comprising:

[0008] First connector;

[0009] The second connector has a through hole, a portion of the first connector is located inside the through hole, the outer sidewall of the first connector includes a first inclined surface, the inner sidewall of the through hole includes a second inclined surface, and the first inclined surface and the second inclined surface are in a limiting fit.

[0010] Understandably, the through hole allows for the accommodation and installation guidance of the first connector. The limiting fit between the first and second inclined surfaces reduces the processing difficulty between the first and second connectors. The first connector is connected to the second connector through the limiting fit between the first and second inclined surfaces, which limits the relative movement of the first and second connectors, thereby improving the connection strength between the first and second connectors, thus enhancing the stability of the battery cover assembly and extending the battery's lifespan.

[0011] In one feasible implementation, along a first direction, a portion of the outer sidewall of the first connector extends toward the side closer to the second connector, such that a portion of the outer sidewall of the first connector forms a first inclined surface, the first direction being perpendicular to the extension direction of the through hole.

[0012] Understandably, the outer wall of part of the first connector extends toward the side closer to the second connector to form a first inclined surface, which can reduce the processing difficulty of the first inclined surface and thus improve the connection efficiency between the first connector and the second connector.

[0013] In one feasible implementation, along a first direction, a portion of the inner wall of the through hole extends toward the side away from the first connector, such that a portion of the inner wall of the through hole forms a second inclined surface, the first direction being perpendicular to the extension direction of the through hole.

[0014] It is understandable that the outer wall of part of the second connector extends toward the side away from the first connector to form a second inclined surface, which can reduce the processing difficulty of the second inclined surface and thus improve the connection efficiency between the first connector and the second connector.

[0015] In one feasible implementation, the first connector has an upper end face along the extension direction of the through hole.

[0016] The first end of the first inclined surface is connected to the upper end surface, and the orthographic projection of the second end of the first inclined surface onto the upper end surface lies within the orthographic projection of the first end of the first inclined surface onto the upper end surface; and / or,

[0017] Along the extension direction of the through hole, the second connector has a bearing surface, the first end of the second inclined surface is connected to the bearing surface, and the second end of the second inclined surface is located within the orthographic projection of the first end of the second inclined surface onto the bearing surface.

[0018] It is understandable that, along the extension direction of the through hole, the orthographic projection of the second end of the first inclined surface onto the upper surface lies within the orthographic projection of the first end of the first inclined surface onto the upper surface, thus increasing the extension area of ​​the first inclined surface. Similarly, along the extension direction of the through hole, the orthographic projection of the second end of the second inclined surface onto the bearing surface lies within the orthographic projection of the first end of the second inclined surface onto the bearing surface, thus increasing the extension area of ​​the second inclined surface. This, in turn, increases the contact area between the first and second inclined surfaces, thereby improving the connection strength between the first and second connectors.

[0019] In one feasible implementation, along the extension direction of the through hole, the first connector has an upper end face, the first end of the first inclined surface is connected to the upper end face, the second end of the first inclined surface is projected onto the upper end face, and the first end of the first inclined surface is located within the projected image of the first end of the first inclined surface onto the upper end face. The second end of the first inclined surface and the upper end face have a first distance H1, which satisfies: 10mm ≥ H1 ≥ 0.15mm.

[0020] And / or, along the extension direction of the through hole, the second connector has a bearing surface, the first end of the second inclined surface is connected to the bearing surface, the second end of the second inclined surface is located in the orthographic projection of the bearing surface, and there is a second distance H2 between the second end of the second inclined surface and the bearing surface, the second distance H2 satisfying: 10mm≥H2≥0.15mm.

[0021] Understandably, the first spacing H1 satisfies: 10mm ≥ H1 ≥ 0.15mm. This increases the vertical component of the first inclined surface in the extension direction of the through hole, thereby increasing the extension height of the first connector and increasing the surface area of ​​the first inclined surface. This, in turn, increases the contact area at the connection between the first and second inclined surfaces, thus improving the connection strength between the first and second connectors. Similarly, the second spacing H2 satisfies: 10mm ≥ H2 ≥ 0.15mm. This increases the vertical component of the second inclined surface and its surface area, thereby increasing the extension height of the second connector and the contact area at the connection between the first and second inclined surfaces, further improving the connection strength between the first and second connectors.

[0022] In one feasible implementation, the first inclined surface is set at an angle to the extension direction of the through hole, and the angle is an acute angle.

[0023] And / or, the second inclined surface is set at an angle to the extension direction of the through hole, and the angle is acute.

[0024] It is understandable that an acute angle can reduce the difficulty of connecting the first connector and the second connector, and can make the first inclined surface and the second inclined surface cooperate to limit the movement of the first connector along the extension direction of the through hole, thereby improving the connection strength between the first connector and the second connector.

[0025] In one feasible implementation, the outer side wall of the first connector further includes a first connecting surface, the first connecting surface extending along the extension direction of the through hole, a first end of the first connecting surface being connected to the upper end surface, and a second end of the first connecting surface being connected to the first end of the first inclined surface.

[0026] The inner wall of the through hole also includes a second connecting surface, the first end of which is connected to the bearing surface, and the second end of which is connected to the first end of the second inclined surface;

[0027] The first connecting surface and the second connecting surface are fitted together.

[0028] It is understandable that the first connecting surface and the second connecting surface are fitted together, which can limit the offset of the first connecting piece and the second connecting piece along the extension direction of the through hole, thereby improving the connection strength between the first connecting piece and the second connecting piece and extending the service life of the battery cover assembly.

[0029] In one feasible implementation, along the extension direction of the through hole, the first connecting surface has a third height H3, the third height H3 satisfying: 0.5*H1≥H3>0mm, where H1 is the distance between the second end and the upper end surface of the first inclined surface;

[0030] And / or, along the extension direction of the through hole, the second connecting surface has a fourth height H4, the fourth height H4 satisfying: 0.5*H2≥H4>0mm, where H2 is the distance between the second end of the second inclined surface and the bearing surface.

[0031] Understandably, the third height H3 satisfies: 0.5*H1≥H3>0mm, which allows the first connecting surface to limit the offset of the first and second connectors along the extension direction of the through hole, thereby improving the connection strength between the first and second connectors and extending the service life of the battery cover assembly. It also reduces the space occupied by the first connecting surface along the extension direction of the through hole, thus reducing the connection difficulty between the first and second connectors. The fourth height H4 satisfies: 0.5*H2≥H4>0mm, which allows the second connecting surface to limit the offset of the first and second connectors along the extension direction of the through hole, thereby improving the connection strength between the first and second connectors and extending the service life of the battery cover assembly. It also reduces the space occupied by the second connecting surface along the extension direction of the through hole, thus reducing the connection difficulty between the first and second connectors.

[0032] In one feasible implementation, the first inclined surface has a first slope K1, and the second inclined surface has a second slope K2, wherein the first slope K1 and the second slope K2 satisfy the following:

[0033] K1 = K2.

[0034] It is understandable that if the first slope K1 and the second slope K2 satisfy K1 equals K2, the first inclined surface and the second inclined surface are connected, which can limit the movement of the first connector along the extension direction of the through hole, thereby improving the connection strength between the first inclined surface and the second inclined surface, and thus improving the connection strength between the first connector and the second connector.

[0035] In one feasible implementation, the first connector is a cylindrical connector, the first inclined surface is a first annular inclined surface, the second inclined surface is a second annular inclined surface, and the first annular inclined surface and the second annular inclined surface are configured to cooperate.

[0036] Understandably, the cylindrical connector can reduce the processing difficulty of the first connector, and the first annular inclined surface and the second annular inclined surface are set together to reduce the connection difficulty between the first connector and the second connector, thereby improving the processing efficiency of the battery cover assembly.

[0037] In one feasible implementation, the first inclined surface includes two opposing first extended surfaces and two opposing first arcuate surfaces, one first extended surface being connected to one end of the two first arcuate surfaces and the other first extended surface being connected to the other end of the two first arcuate surfaces.

[0038] The second inclined surface includes two opposing second extended surfaces and two opposing second arcuate surfaces, one second extended surface being connected to one end of the two second arcuate surfaces and the other second extended surface being connected to the other end of the two second arcuate surfaces.

[0039] It is understandable that the two opposing first extended surfaces and the two opposing first arcuate surfaces together enclose and form the first inclined surface, and the two opposing second extended surfaces and the two opposing second arcuate surfaces together enclose and form the second inclined surface. This can increase the extension area of ​​the first inclined surface and the second inclined surface, thereby increasing the surface area of ​​the contact surface between the first inclined surface and the second inclined surface, and thus improving the connection strength between the first connector and the second connector.

[0040] In one possible implementation, at least a portion of the second connector protrudes beyond the first connector.

[0041] It is understandable that the second connector protruding from the first connector can reduce the occurrence of direct connection between the first connector and the connecting piece. Furthermore, the second connector can increase the connection area between two adjacent batteries, thereby increasing the current-carrying area between the second connector and the connecting piece, thus improving the current-carrying capacity between the second connector and the connecting piece, and ultimately improving the connection performance of the two batteries.

[0042] In one possible implementation, the first connector has a first groove formed on the upper end face of the first connector.

[0043] Understandably, during the assembly of the battery cover assembly, the punch is placed in the first groove and pushed in the axial direction of the first groove under the drive of external force. The punch will move towards the side away from the opening of the first groove. During the movement, the punch will drive the first connector to move towards the side closer to the through hole and abut against the second connector. The first connector and the second connector abut against each other under the impact force of the punch, thereby reducing the connection difficulty between the first connector and the second connector.

[0044] In one feasible implementation, the upper end face has a first length L1 along the first direction; the first groove has a second length L2 along the first direction; the first length L1 and the second length L2 satisfy the following:

[0045] 20mm≥L1-L2>0mm, the first direction is perpendicular to the extension direction of the through hole.

[0046] It is understandable that the first length L1 and the second length L2 satisfy the condition: 20mm ≥ L1 - L2 > 0mm. This allows the first connector to move towards the side closer to the second connector, enabling the first connector and the second connector to connect. It also ensures the connection strength between the part of the first connector that moves towards the second connector and the first connector, thereby reducing the occurrence of fracture due to fatigue damage of the first connector, thus improving the service life of the first connector, and reducing the assembly difficulty between the first connector and the second connector.

[0047] In one feasible implementation, along the first direction, the upper end face has a first length L1, the first groove has a second length L2, and the first inclined surface has a third extension length L3, the third extension length L3 satisfying: L3≥(L1-L2) / 2;

[0048] And / or, along the first direction, the second inclined surface has a fourth extension length L4, the fourth extension length L4 satisfying: L4≥(L1-L2) / 2;

[0049] The first direction is perpendicular to the extension direction of the through hole.

[0050] Understandably, the third extension length L3 satisfies L3≥(L1-L2) / 2, which reduces the space occupied by the first inclined surface, thereby reducing the space occupied by the first connector, and also reduces the connection difficulty between the first and second connectors, thus improving the installation efficiency of the battery cover assembly. Similarly, the fourth extension length L4 satisfies L4≥(L1-L2) / 2, which reduces the space occupied by the second inclined surface, thereby reducing the space occupied by the second connector, and also reduces the connection difficulty between the first and second connectors, thus improving the installation efficiency of the battery cover assembly.

[0051] In one feasible implementation, the first groove has a groove sidewall and a groove bottomwall, and the first connector further includes a second groove disposed on the groove bottomwall, the second groove being used for positioning.

[0052] Understandably, during the assembly of the battery cover assembly, the second groove is used to assist in positioning the punch, thereby improving the connection accuracy between the punch and the first groove and reducing the radial offset of the punch in the second groove, thus improving the connection stability between the first connector and the second connector.

[0053] In one feasible implementation, the battery cover assembly further includes:

[0054] Cover plate;

[0055] An insulating component is disposed between the cover plate and the second connecting component;

[0056] A sealing ring is fitted onto the first connector and is sealed and insulated from the cover plate.

[0057] Understandably, the cover plate is used to connect with the battery casing to provide safety protection for the components inside the battery, thereby improving the battery's safety performance; the insulating component is used to insulate the connection between the cover plate and the second connector to reduce the occurrence of short circuits caused by conductive connection between the second connector and the cover plate, thus providing safety protection for the battery; the sealing ring is used to seal the inside of the battery casing to reduce interference from the external environment to the inside of the battery casing, thereby protecting the inside of the battery casing; the sealing ring is fitted onto the first connector to reduce contact between the first connector and the cover plate, which could lead to short circuits in the battery, thereby improving the battery's safety performance.

[0058] In one feasible implementation, it further includes:

[0059] An insulating spacer is located on the side of the cover plate opposite to the second connector;

[0060] The lead-out piece is located away from the cover plate from the insulating spacer and is electrically connected to the first connector.

[0061] Understandably, insulating spacers are used to insulate the connection between the cover plate and the lead-out piece, thereby reducing the occurrence of short circuits in the battery caused by the connection between the cover plate and the lead-out piece, thus improving the battery's safety performance. The lead-out piece can increase the connection area between the tab and the first connector, thereby increasing the current-carrying area between the tab and the lead-out piece or the first connector, thus improving the battery's fast-charging performance.

[0062] A second aspect of this application provides a battery, including a battery casing and a battery cover assembly;

[0063] The battery cover assembly is installed on the battery housing.

[0064] A third aspect of this application provides a battery pack, including a battery.

[0065] A fourth aspect of this application provides an electrical device, including an electrical appliance and a battery or battery pack, wherein the battery or battery pack is used to provide electrical energy to the electrical appliance.

[0066] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the battery cover assembly, battery, battery pack, and electrical equipment provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0067] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0068] Figure 1 One of the schematic diagrams of the main structure of the battery cover assembly provided for an embodiment of this application;

[0069] Figure 2 A second schematic diagram of the main structure of the battery cover assembly provided for an embodiment of this application;

[0070] Figure 3 for Figure 1 Sectional view of section BB;

[0071] Figure 4 for Figure 3 A partially enlarged structural diagram of the first and second connectors in the diagram;

[0072] Figure 5 for Figure 1 Sectional view of section AA;

[0073] Figure 6 One of the schematic diagrams of the main structure of the first connector provided for an embodiment of this application;

[0074] Figure 7 One of the schematic diagrams of the main structure of the second connector provided for an embodiment of this application;

[0075] Figure 8 A second schematic diagram of the main structure of the first connector provided for an embodiment of this application;

[0076] Figure 9 A second schematic diagram of the main structure of the second connector provided for an embodiment of this application;

[0077] Figure 10 An exploded view of the battery cover assembly provided in an embodiment of this application.

[0078] Explanation of reference numerals in the attached figures:

[0079] 100 - First connector; 101 - First inclined surface; 102 - Upper end face; 103 - First groove; 1031 - Groove sidewall; 1032 - Groove bottom wall; 104 - First connecting surface;

[0080] 200 - Second connector; 201 - Through hole; 202 - Second inclined surface; 203 - Bearing surface; 204 - Second connecting surface;

[0081] 300 - Second slot;

[0082] 400 - Cover plate;

[0083] 500 - Insulating parts;

[0084] 600 - Sealing ring;

[0085] 700 - Insulating spacer;

[0086] 800-extraction film;

[0087] H1 - First spacing;

[0088] H2 - Second spacing;

[0089] H3 - Third Height;

[0090] H4 - Fourth Height;

[0091] L1 - First length;

[0092] L2 - Second length;

[0093] L3 - Third extension length;

[0094] L4 - Fourth extension length;

[0095] X - First direction. Detailed Implementation

[0096] A battery is a power source that provides power to tools, and often refers to the storage or rechargeable battery that powers electric vehicles, electric trains, electric bicycles, and golf carts.

[0097] Current batteries are generally composed of structural components such as a cover plate, a battery casing, and terminals; the cover plate is installed on the battery casing, and the terminals are installed on the cover plate.

[0098] In related technologies, the electrode post has the problems of high processing and welding difficulty and poor reliability, which leads to poor stability of the battery cover assembly and reduced battery life.

[0099] The embodiments of this application provide a battery cover assembly. The through hole can accommodate and guide the installation of the first connector. The limiting fit between the first and second inclined surfaces can reduce the processing difficulty between the first and second connectors. The first connector is connected to the second connector through the limiting fit between the first and second inclined surfaces, which can limit the relative movement of the first and second connectors, thereby improving the connection strength between the first and second connectors, thus improving the stability of the battery cover assembly and extending the battery's service life.

[0100] like Figure 1 and Figure 2 As shown, the battery cover assembly provided in the embodiments of this application includes: a first connector 100 and a second connector 200. The second connector 200 has a through hole 201. A portion of the first connector 100 is located inside the through hole 201. The outer sidewall of the first connector 100 includes a first inclined surface 101, and the inner sidewall of the through hole 201 includes a second inclined surface 202. The first inclined surface 101 and the second inclined surface 202 are mutually restrictive.

[0101] like Figure 3 and Figure 4 As shown, it should be noted that the first connector 100 and the second connector 200 have a variety of different configurations. The specific configurations of the first connector 100 and the second connector 200 will be illustrated with examples below.

[0102] In one feasible implementation, the first connector 100 is a copper electrode post, the second connector 200 is an aluminum electrode post, and the copper electrode post and the aluminum electrode post are connected.

[0103] Understandably, copper terminals have strong high-temperature resistance, which can reduce the problem of excessive heat generation during fast charging. Furthermore, copper terminals have strong current-carrying capacity, which can improve the battery's fast-charging performance and thus extend its lifespan. Aluminum terminals, on the other hand, are lightweight, reducing the weight of the battery cover assembly and consequently the overall weight of the electrical device, thereby improving energy efficiency.

[0104] In another feasible implementation, the first connector 100 is a gold terminal and the second connector 200 is a silver terminal, and the gold terminal and the silver terminal are connected.

[0105] Understandably, gold and silver terminals have strong conductivity, which can improve the fast charging performance of the battery and thus extend its service life; in addition, the good ductility of gold and silver terminals can reduce the difficulty of connecting them, thereby improving the processing efficiency of the battery cover assembly.

[0106] It is understandable that there are no restrictions on the specific configuration of the first connector 100 and the second connector 200. They can be selected according to actual usage requirements, as long as the first connector 100 and the second connector 200 are connected by an interference fit.

[0107] It should be noted that the through hole 201 is used to accommodate the first connector 100 to limit the offset of the first connector 100 in the radial direction along the through hole 201. The first inclined surface 101 and the second inclined surface 202 limit the offset of the first connector 100 in the extension direction of the through hole 201, thereby improving the connection stability between the first connector 100 and the second connector 200, and thus improving the connection strength between the first connector 100 and the second connector 200.

[0108] It should be noted that the first connector 100 is electrically connected to the battery cell through the battery tab, and the second connector 200 forms a conductive contact portion. The conductive contact portion is used to connect an external connecting piece, which is used to connect two adjacent batteries so that the two adjacent batteries are electrically connected.

[0109] It should be noted that, along the first direction X, a portion of the outer wall of the first connector 100 extends toward the side closer to the second connector 200, so that a portion of the outer wall of the first connector 100 forms a first inclined surface 101, and the first direction X is perpendicular to the extension direction of the through hole 201.

[0110] It is understandable that the outer wall of part of the first connector 100 extends toward the side closer to the second connector 200 to form a first inclined surface 101, which can reduce the processing difficulty of the first inclined surface 101 and thus improve the connection efficiency between the first connector 100 and the second connector 200.

[0111] It should be noted that the through hole 201 has a variety of different shapes, and the following are examples of the shapes of the through hole 201.

[0112] like Figure 5 As shown, in one feasible embodiment, the through hole 201 is a circular hole, the extension direction of the through hole 201 is the axial direction of the circular hole, and the first direction X is the radial direction of the circular hole.

[0113] Understandably, circular holes have the advantage of being easy to make and can reduce the difficulty of connecting the first connector 100 and the second connector 200.

[0114] In another feasible implementation, the through hole 201 is an oblong hole, and the first direction X is the direction from the rotation center of the oblong hole to the outer peripheral wall of the oblong hole.

[0115] It is understandable that the opening of the waist-shaped elongated hole can increase the contact area between the first connector 100 and the second connector 200, thereby increasing the space occupied by the first connector 100 and reducing the heating temperature of the first connector 100.

[0116] Understandably, the shape of the through hole 201 is not limited and can be selected according to actual usage requirements.

[0117] It should be noted that, along the first direction X, the inner wall of part of the through hole 201 extends toward the side away from the first connector 100, so that at least part of the inner wall of the through hole 201 forms a second inclined surface 202, and the first direction X is perpendicular to the extension direction of the through hole 201.

[0118] It is understandable that the outer wall of part of the second connector 200 extends toward the side away from the first connector 100 to form a second inclined surface 202, which can reduce the processing difficulty of the second inclined surface 202 and thus improve the connection efficiency between the first connector 100 and the second connector 200.

[0119] It should be noted that the first inclined surface 101 and the second inclined surface 202 can be set in a variety of different ways. The following are examples illustrating the setting methods of the first inclined surface 101 and the second inclined surface 202.

[0120] like Figure 6 As shown, in one feasible embodiment, along the extension direction of the through hole 201, the first connector 100 has an upper end face 102, the first end of the first inclined surface 101 is connected to the upper end face 102, and the second end of the first inclined surface 101 is located in the orthographic projection of the first end of the first inclined surface 101 onto the upper end face 102.

[0121] It is understandable that, along the extension direction of the through hole 201, the orthographic projection of the second end of the first inclined surface 101 onto the upper end surface 102 is located within the orthographic projection of the first end of the first inclined surface 101 onto the upper end surface 102. This can increase the extension area of ​​the first inclined surface 101, thereby increasing the contact area between the first inclined surface 101 and the second inclined surface 202, and thus improving the connection strength between the first connector 100 and the second connector 200.

[0122] like Figure 7 As shown, in another feasible embodiment, along the extension direction of the through hole 201, the second connector 200 has a bearing surface 203, the first end of the second inclined surface 202 is connected to the bearing surface 203, and the second end of the second inclined surface 202 is located in the orthographic projection of the bearing surface 203, within the orthographic projection of the first end of the second inclined surface 202 on the bearing surface 203.

[0123] It is understandable that, along the extension direction of the through hole 201, the second end of the second inclined surface 202, in the orthographic projection of the bearing surface 203, is located within the orthographic projection of the first end of the second inclined surface 202 in the bearing surface 203. This can increase the extension area of ​​the second inclined surface 202, thereby increasing the contact area between the first inclined surface 101 and the second inclined surface 202, and thus improving the connection strength between the first connector 100 and the second connector 200.

[0124] In addition, in another feasible embodiment, along the extending direction of the through hole 201, the first connector 100 has an upper end face 102, the first end of the first inclined surface 101 is connected to the upper end face 102, and the second end of the first inclined surface 101, in its orthographic projection onto the upper end face 102, lies within the orthographic projection of the first end of the first inclined surface 101 onto the upper end face 102. Along the extending direction of the through hole 201, the second connector 200 has a bearing surface 203, the first end of the second inclined surface 202 is connected to the bearing surface 203, and the second end of the second inclined surface 202, in its orthographic projection onto the bearing surface 203, lies within the orthographic projection of the first end of the second inclined surface 202 onto the bearing surface 203.

[0125] It is understandable that, along the extension direction of the through hole 201, the orthographic projection of the second end of the first inclined surface 101 onto the upper end surface 102 lies within the orthographic projection of the first end of the first inclined surface 101 onto the upper end surface 102, thus increasing the extension area of ​​the first inclined surface 101. Similarly, along the extension direction of the through hole 201, the orthographic projection of the second end of the second inclined surface 202 onto the bearing surface 203 lies within the orthographic projection of the first end of the second inclined surface 202 onto the bearing surface 203, thus increasing the extension area of ​​the second inclined surface 202. This, in turn, increases the contact area between the first inclined surface 101 and the second inclined surface 202, thereby improving the connection strength between the first connector 100 and the second connector 200.

[0126] It is understandable that there are no restrictions on the specific configuration of the first inclined surface 101 and the second inclined surface 202, and they can be selected according to actual usage requirements.

[0127] It should be noted that, along the extension direction of the through hole 201, the first connector 100 has an upper end face 102, the first end of the first inclined surface 101 is connected to the upper end face 102, and the second end of the first inclined surface 101 is located within the orthographic projection of the upper end face 102. In this case, the second end of the first inclined surface 101 and the upper end face 102 have a first distance H1, which satisfies the following condition: 10mm ≥ H1 ≥ 0.15mm.

[0128] It is understandable that the first spacing H1 satisfies: 10mm≥H1≥0.15mm, which can increase the vertical component of the first inclined surface 101 in the extension direction of the through hole 201, thereby increasing the extension height of the first connector 100, increasing the surface area of ​​the first inclined surface 101, thereby increasing the contact area at the connection between the first inclined surface 101 and the second inclined surface 202, and thus improving the connection strength between the first connector 100 and the second connector 200.

[0129] It should be noted that if the first spacing H1 is less than 0.15mm, the surface area of ​​the first inclined surface 101 will become smaller, thereby reducing the connection area between the first inclined surface 101 and the second inclined surface 202, resulting in a decrease in the connection strength between the first connector 100 and the second connector 200.

[0130] It should be noted that if the first spacing H1 is greater than 10mm, it will cause the first inclined surface 101 to be difficult to process, and will also cause the space occupied by the first inclined surface 101 to increase, thereby causing the battery to heat up and the battery to deteriorate.

[0131] It should be noted that, along the extension direction of the through hole 201, the second connector 200 has a bearing surface 203, the first end of the second inclined surface 202 is connected to the bearing surface 203, and the second end of the second inclined surface 202 is located within the orthographic projection of the bearing surface 203. When the first end of the second inclined surface 202 is within the orthographic projection of the bearing surface 203, there is a second distance H2 between the second end of the second inclined surface and the bearing surface 203. The second distance H2 satisfies: 10mm ≥ H2 ≥ 0.15mm.

[0132] It is understandable that the second spacing H2 satisfies: 10mm≥H2≥0.15mm, which can increase the vertical component of the second inclined surface 202 and increase the surface area of ​​the second inclined surface 202, thereby increasing the extension height of the second connector 200 and increasing the contact area at the connection between the first inclined surface 101 and the second inclined surface 202, so as to improve the connection strength between the first connector 100 and the second connector 200.

[0133] It should be noted that if the second spacing H2 is less than 0.15mm, the surface area of ​​the second inclined surface 202 will become smaller, thereby reducing the connection area between the first inclined surface 101 and the second inclined surface 202, resulting in a decrease in the connection strength between the first connector 100 and the second connector 200.

[0134] It should be noted that if the second spacing H2 is greater than 10mm, it will cause the second inclined surface 202 to be difficult to process, and will also cause the space occupied by the second inclined surface 202 to increase, thereby causing the battery to heat up and the battery to deteriorate.

[0135] It should be noted that there are several different ways to arrange the extension directions of the first inclined surface 101, the second inclined surface 202 and the through hole 201. The following are examples illustrating the extension methods of the first inclined surface 101, the second inclined surface 202 and the through hole 201.

[0136] In one feasible implementation, the first inclined surface 101 is set at an angle to the extending direction of the through hole 201, and the angle is an acute angle.

[0137] It is understandable that an acute angle can reduce the difficulty of connecting the first connector 100 and the second connector 200, and can make the first inclined surface 101 and the second inclined surface 202 cooperate to limit the movement of the first connector 100 along the extension direction of the through hole 201, thereby improving the connection strength between the first connector 100 and the second connector 200.

[0138] It should be noted that if the included angle is obtuse, the space occupied by the first connector 100 will increase, and the obtuse angle will make the second inclined surface 202, which mates with the first inclined surface 101, difficult to process, resulting in greater installation difficulty and lower installation efficiency for the first connector 100 and the second connector 200.

[0139] It should be noted that if the included angle is a right angle, the connection strength between the first inclined surface 101 and the second inclined surface 202 will be reduced, which will result in a weaker connection strength between the first connector 100 and the second connector 200, and a shorter service life for the battery cover assembly.

[0140] In another feasible embodiment, the second inclined surface 202 is set at an angle to the extending direction of the through hole 201, and the angle is an acute angle.

[0141] It is understandable that an acute angle can reduce the difficulty of connecting the first connector 100 and the second connector 200, and can make the first inclined surface 101 and the second inclined surface 202 cooperate to limit the movement of the first connector 100 along the extension direction of the through hole 201, thereby improving the connection strength between the first connector 100 and the second connector 200.

[0142] It should be noted that if the included angle is obtuse, the space occupied by the second connector 200 will be larger, and the obtuse angle will make the first inclined surface 101 that mates with the second inclined surface 202 difficult to process, which will make the installation of the first connector 100 and the second connector 200 difficult and inefficient.

[0143] It should be noted that if the included angle is a right angle, the connection strength between the first inclined surface 101 and the second inclined surface 202 will be reduced, which will result in a weaker connection strength between the first connector 100 and the second connector 200, and a shorter service life for the battery cover assembly.

[0144] In addition, in another feasible embodiment, the first inclined surface 101 is set at an angle with the extension direction of the through hole 201, and the angle is acute; the second inclined surface 202 is set at an angle with the extension direction of the through hole 201, and the angle is acute.

[0145] It is understandable that an acute angle can reduce the difficulty of connecting the first connector 100 and the second connector 200, and can make the first inclined surface 101 and the second inclined surface 202 cooperate to limit the movement of the first connector 100 along the extension direction of the through hole 201, thereby improving the connection strength between the first connector 100 and the second connector 200.

[0146] It should be noted that if the included angle is obtuse, the space occupied by the second connector 200 will be larger, and the obtuse angle will make the first inclined surface 101 that mates with the second inclined surface 202 difficult to process, which will make the installation of the first connector 100 and the second connector 200 difficult and inefficient.

[0147] It should be noted that if the included angle is a right angle, the connection strength between the first inclined surface 101 and the second inclined surface 202 will be reduced, which will result in a weaker connection strength between the first connector 100 and the second connector 200, and a shorter service life for the battery cover assembly.

[0148] It is understandable that the arrangement of the first inclined surface 101, the second inclined surface 202 and the extension direction of the through hole 201 is not limited and can be selected according to actual usage requirements.

[0149] The outer sidewall of the first connector 100 provided in the embodiments of this application further includes a first connecting surface 104, which extends along the extension direction of the through hole 201. The first end of the first connecting surface 104 is connected to the upper end surface 102, and the second end of the first connecting surface 104 is connected to the first end of the first inclined surface 101. The inner sidewall of the through hole 201 further includes a second connecting surface 204, the first end of which is connected to the bearing surface 203, and the second end of which is connected to the first end of the second inclined surface 202. The first connecting surface 104 and the second connecting surface 204 are fitted together.

[0150] It is understandable that the first connecting surface 104 and the second connecting surface 204 are fitted together, which can limit the offset of the first connector 100 and the second connector 200 along the extension direction of the through hole 201, thereby improving the connection strength between the first connector 100 and the second connector 200 and extending the service life of the battery cover assembly.

[0151] like Figure 8 As shown, it should be noted that along the extension direction of the through hole 201, the first connecting surface 104 has a third height H3, which satisfies: 0.5*H1≥H3>0mm, where H1 is the distance between the second end of the first inclined surface 101 and the upper end surface 102.

[0152] Understandably, the third height H3 satisfies: 0.5*H1≥H3>0mm, which allows the first connecting surface 104 to limit the offset of the first connector 100 and the second connector 200 along the extension direction of the through hole 201, thereby improving the connection strength between the first connector 100 and the second connector 200 and extending the service life of the battery cover assembly. Furthermore, it reduces the space occupied by the first connecting surface 104 along the extension direction of the through hole 201, thus reducing the connection difficulty between the first connector 100 and the second connector 200.

[0153] It should be noted that if the third height H3 is greater than 0.5*H1, the space occupied by the first connecting surface 104 along the extension direction of the through hole 201 will increase, thereby making the connection between the first connector 100 and the second connector more difficult.

[0154] like Figure 9 As shown, it should be noted that the fourth height H4 is along the extension direction of the through hole 201, and the second connecting surface 204 has a fourth height H4. The fourth height H4 satisfies: 0.5*H2≥H4>0mm, where H2 is the distance between the second end of the second inclined surface 202 and the bearing surface 203.

[0155] Understandably, satisfying 0.5*H≥H4>0mm allows the second connecting surface 204 to limit the offset of the first connector 100 and the second connector 200 along the extension direction of the through hole 201, thereby improving the connection strength between the first connector 100 and the second connector 200 and extending the service life of the battery cover assembly. Furthermore, it reduces the space occupied by the second connecting surface 204 along the extension direction of the through hole 201, thus reducing the connection difficulty between the first connector 100 and the second connector 200.

[0156] It should be noted that if the fourth height H4 is greater than 0.5*H2, the space occupied by the second connecting surface 204 along the extension direction of the through hole 201 will increase, thereby making the connection between the first connector 100 and the second connector more difficult.

[0157] It should be noted that the first inclined surface 101 has a first slope K1, and the second inclined surface 202 has a second slope K2. The first slope K1 and the second slope K2 satisfy the following condition: K1 = K2.

[0158] It should be noted that the first slope K1 can be the ratio of the height of the first inclined surface 101 along the extension direction of the through hole 201 to the length of the first inclined surface 101 along the radial direction of the through hole 201; the second slope K2 can be the ratio of the height of the second inclined surface 202 along the extension direction of the through hole 201 to the length of the second inclined surface 202 along the radial direction of the through hole 201.

[0159] It is understandable that if the first slope K1 and the second slope K2 satisfy K1 equals K2, the first inclined surface 101 and the second inclined surface 202 are connected, which can limit the movement of the first connector 100 along the extension direction of the through hole 201, and can improve the connection strength between the first inclined surface 101 and the second inclined surface 202, thereby improving the connection strength between the first connector 100 and the second connector 200.

[0160] It should be noted that if the first slope K1 and the second slope K2 satisfy the condition that K1 is not equal to K2, and there is a gap between the first inclined surface 101 and the second inclined surface 202, the connection strength between the first connector 100 and the second connector 200 will be reduced, thereby affecting the service life of the battery cover assembly.

[0161] It should be noted that the first connector 100 is a cylindrical connector, the first inclined surface 101 is a first annular inclined surface, and the second inclined surface 202 is a second annular inclined surface. The first annular inclined surface and the second annular inclined surface are configured to cooperate with each other.

[0162] Understandably, the cylindrical connector can reduce the processing difficulty of the first connector 100, and the first annular inclined surface and the second annular inclined surface are set together to reduce the connection difficulty between the first connector 100 and the second connector 200, thereby improving the processing efficiency of the battery cover assembly.

[0163] It should be noted that the first inclined surface 101 and the second inclined surface 202 have a variety of different configuration shapes. The configuration shapes of the first inclined surface 101 and the second inclined surface 202 will be illustrated with examples below.

[0164] In one feasible implementation, the first inclined surface 101 is a first annular inclined surface, the second inclined surface 202 is a second annular inclined surface, and the first annular inclined surface abuts against the second annular inclined surface.

[0165] It is understandable that the abutment of the first annular inclined surface and the second annular inclined surface can reduce the connection difficulty between the first connector 100 and the second connector 200, thereby improving the processing efficiency of the battery cover assembly.

[0166] In another feasible implementation, the first inclined surface 101 includes two opposing first extended surfaces and two opposing first arcuate surfaces, one first extended surface being connected to one end of the two first arcuate surfaces and the other first extended surface being connected to the other end of the two first arcuate surfaces; the second inclined surface 202 includes two opposing second extended surfaces and two opposing second arcuate surfaces, one second extended surface being connected to one end of the two second arcuate surfaces and the other second extended surface being connected to the other end of the two second arcuate surfaces.

[0167] It is understood that the two opposing first extended surfaces and the two opposing first arcuate surfaces together enclose and form the first inclined surface 101, and the two opposing second extended surfaces and the two opposing second arcuate surfaces together enclose and form the second inclined surface 202. This can increase the extension area of ​​the first inclined surface 101 and the second inclined surface 202, thereby increasing the surface area of ​​the contact surface between the first inclined surface 101 and the second inclined surface 202, and thus improving the connection strength between the first connector 100 and the second connector 200.

[0168] It is understandable that the shape of the first inclined surface 101 and the second inclined surface 202 is not limited and can be selected according to actual usage requirements.

[0169] The second connector 200 provided in the embodiments of this application is at least partially protruding from the first connector 100.

[0170] It is understandable that the second connector 200 protruding from the first connector 100 can reduce the occurrence of direct connection between the first connector 100 and the connecting piece. Furthermore, the second connector 200 can increase the connection area between two adjacent batteries, thereby increasing the current-carrying area between the second connector 200 and the connecting piece, thus improving the current-carrying capacity between the second connector 200 and the connecting piece, and ultimately improving the connection performance of the two batteries.

[0171] It is understandable that the conductive contact portion is provided on the part of the second connector 200 that protrudes from the first connector 100. The conductive contact portion can increase the area between the second connector 200 and the external connecting piece, thereby improving the current carrying capacity of the electrode.

[0172] The first connector 100 provided in the embodiments of this application has a first groove 103, which is formed on the upper end surface 102 of the first connector 100.

[0173] It should be noted that during the assembly of the battery cover assembly, the first groove 103 is used to accommodate the punch. The punch is set in the first groove 103. The first groove 103 can limit the displacement of the punch in the radial direction of the first groove 103. The first groove 103 is used to assist in positioning the punch and can reduce the occurrence of poor stamping stability caused by the eccentric setting of the first groove 103, thereby reducing the impact difficulty between the punch and the first connector 100, so as to improve the connection stability between the first connector 100 and the second connector 200.

[0174] Understandably, during the assembly of the battery cover assembly, the punch is placed in the first groove 103 and pushed in the axial direction of the first groove 103 under the drive of external force. The punch will move towards the side away from the opening of the first groove 103. During the movement, the punch will drive the first connector 100 to move towards the side closer to the through hole 201 and abut against the second connector 200. The first connector 100 and the second connector 200 abut against each other under the impact force of the punch, thereby reducing the connection difficulty between the first connector 100 and the second connector 200.

[0175] The battery cover assembly provided in the embodiments of this application has a first length L1 on the upper end surface 102 along the first direction X; and a second length L2 on the second groove 300 along the first direction X; the first length L1 and the second length L2 satisfy the following condition: 20mm ≥ L1-L2 > 0mm, and the first direction X is perpendicular to the extension direction of the through hole 201.

[0176] It is understandable that the first length L1 and the second length L2 satisfy the condition that 20mm ≥ L1 - L2 > 0mm. This allows the first connector 100 to move toward the side closer to the second connector 200, enabling the first connector 100 and the second connector 200 to connect. It also ensures the connection strength between the part of the first connector 100 that moves toward the second connector 200 and the first connector 100, thereby reducing the occurrence of fracture of the first connector 100 due to fatigue damage, thus improving the service life of the first connector 100, and reducing the assembly difficulty between the first connector 100 and the second connector 200.

[0177] It should be noted that if the first length L1 and the second length L2 satisfy the condition that L1-L2 is greater than 20mm, the punch will be unable to drive the first connector 100 to move toward the side closer to the second connector 200, thereby preventing the first connector 100 and the second connector 200 from being connected.

[0178] It should be noted that there are several different difference relationships between the first length L1 and the second length L2. Examples of the difference relationships between the first length L1 and the second length L2 will be given below.

[0179] In one feasible implementation, the difference L1-L2 between the first length L1 and the second length L2 is 10 mm.

[0180] It is understandable that the difference between the first length L1 and the second length L2, L1-L2, is 10mm. This allows the first connector 100 to move toward one side of the second connector 200 and abut against the second connector 200. It also ensures the connection strength between the moving part of the first connector 100 and the unmoved part of the first connector 100, thereby reducing the difficulty of connecting the first connector 100 and the second connector 200.

[0181] In another feasible implementation, the difference L1-L2 between the first length L1 and the second length L2 is 15 mm.

[0182] It is understandable that the difference between the first length L1 and the second length L2, L1-L2, is 15mm. This allows the first connector 100 to move toward the side of the second connector 200 and abut against the second connector 200. It also ensures the connection strength between the moving part of the first connector 100 and the unmoved part of the first connector 100, thereby reducing the difficulty of connecting the first connector 100 and the second connector 200.

[0183] It is understandable that the difference between the first length L1 and the second length L2 is not restricted and can be selected according to actual usage requirements, as long as the first length L1 and the second length L2 satisfy the following condition: 20mm≥L1-L2≥0mm.

[0184] It should be noted that, along the first direction X, the upper end face 102 has a first length L1, the first groove 103 has a second length L2, and the first direction X is perpendicular to the extension direction of the through hole, the first inclined surface 101 and the second inclined surface 202 have a variety of different setting lengths. The setting lengths between the first inclined surface 101 and the second inclined surface 202 will be illustrated with examples below.

[0185] In one feasible implementation, along the first direction X, the first inclined surface 101 has a third extension length L3, which satisfies: L3≥(L1-L2) / 2.

[0186] It is understandable that the third extension length L3 satisfies: L3≥(L1-L2) / 2, which can reduce the space occupied by the first inclined surface 101, thereby reducing the space occupied by the first connector 100, and can reduce the connection difficulty of the first connector 100 and the second connector 200, so as to improve the installation efficiency of the battery cover assembly.

[0187] In another feasible implementation, along the first direction X, the second inclined surface 202 has a fourth extension length L4, which satisfies: L4≥(L1-L2) / 2.

[0188] It is understandable that the fourth extension length L4 satisfies: L4≥(L1-L2) / 2, which can reduce the space occupied by the second inclined surface 202, thereby reducing the space occupied by the second connector 200, and can reduce the connection difficulty of the first connector 100 and the second connector 200, so as to improve the installation efficiency of the battery cover assembly.

[0189] In addition, in another feasible embodiment, along the first direction X, the first inclined surface 101 has a third extension length L3, the third extension length L3 satisfies: L3≥(L1-L2) / 2; along the first direction X, the second inclined surface 202 has a fourth extension length L4, the fourth extension length L4 satisfies: L4≥(L1-L2) / 2.

[0190] Understandably, the third extension length L3 satisfies L3≥(L1-L2) / 2, which reduces the space occupied by the first inclined surface 101, thereby reducing the space occupied by the first connector 100, and also reduces the connection difficulty between the first connector 100 and the second connector 200, thus improving the installation efficiency of the battery cover assembly. The fourth extension length L4 satisfies L4≥(L1-L2) / 2, which reduces the space occupied by the second inclined surface 202, thereby reducing the space occupied by the second connector 200, and also reduces the connection difficulty between the first connector 100 and the second connector 200, thus improving the installation efficiency of the battery cover assembly.

[0191] It is understandable that, with the upper end face 102 having a first length L1 and the first groove 103 having a second length L2 along the first direction X, and the first direction X being perpendicular to the extension direction of the through hole, the lengths of the first inclined surface 101 and the second inclined surface 202 are not limited and can be selected according to actual usage requirements.

[0192] The first groove 103 provided in the embodiments of this application has a groove sidewall 1031 and a groove bottomwall 1032. The first connector 100 also includes a second groove 300, which is disposed on the groove bottomwall 1032 and is used for positioning.

[0193] Understandably, during the assembly of the battery cover assembly, the second groove 300 is used to assist in positioning the punch to improve the connection accuracy between the punch and the first groove 103, and can reduce the radial offset of the punch in the second groove 300, thereby improving the connection stability between the first connector 100 and the second connector 200.

[0194] It should be noted that during the assembly of the battery cover assembly, the punch moves toward the bottom wall 1032 of the first groove 103 from the groove opening. When the punch abuts against the bottom wall 1032, it pushes the first connector 100 toward the side closer to the second connector 200, so that the first connector 100 and the second connector 200 abut against each other, thereby improving the connection stability between the first connector 100 and the second connector 200.

[0195] It should be noted that the bottom wall 1032 and the side wall 1031 of the tank enclose and form an installation cavity, which is used to accommodate the punch during the assembly of the battery cover assembly.

[0196] Understandably, during the assembly of the battery cover assembly, the mounting cavity can guide the punch to move from the opening of the mounting cavity toward the bottom wall 1032 of the groove, and limit the displacement of the punch in the radial direction of the first groove 103, thereby reducing the connection difficulty between the first connector 100 and the second connector 200.

[0197] It should be noted that the mounting cavity has a variety of different shapes, and examples of the shapes of the mounting cavity will be given below.

[0198] In one feasible implementation, the mounting cavity is a cylindrical cavity, and adaptively, the punch has a cylindrical head that mates with the cylindrical cavity; it is understood that the mate between the cylindrical head and the cylindrical cavity allows the side of the first connector 100 away from the cylindrical head to move toward the side closer to the second connector 200, so that the first connector 100 is connected to the second connector 200.

[0199] In another feasible implementation, the mounting cavity is a conical cavity, and adaptively, the punch has a conical head that mates with the conical cavity; it is understood that the mate between the conical head and the conical cavity allows the side of the first connector 100 away from the conical head to move toward the side closer to the second connector 200, so that the first connector 100 is connected to the second connector 200.

[0200] In addition, in other feasible embodiments, the side of the mounting cavity near the groove opening is a cylindrical cavity, and the side of the mounting cavity near the bottom wall 1032 of the groove is a conical cavity. Adaptively, the punch has a cylindrical head and a conical head that cooperate with the mounting cavity. It is understood that the conical head can pass through the cylindrical cavity and reach the conical cavity. The cooperation between the conical head and the conical cavity allows a portion of the first connector 100 on the side away from the conical head to move toward the side closer to the second connector 200. The cooperation between the cylindrical head and the cylindrical cavity allows another portion of the first connector 100 on the side away from the cylindrical head to move toward the side closer to the second connector 200, so that the first connector 100 is connected to the second connector 200.

[0201] Understandably, there are no restrictions on the shape of the mounting cavity; it can be selected according to actual usage requirements, as long as the mounting cavity and the punch are compatible.

[0202] like Figure 10 As shown, the battery cover assembly provided in the embodiments of this application further includes: a cover plate 400, an insulating member 500, and a sealing ring 600, wherein the insulating member 500 is disposed between the cover plate 400 and the second connecting member 200, and the sealing ring 600 is sleeved on the first connecting member 100 and is sealed and insulated from the cover plate 400.

[0203] Understandably, the cover plate 400 is used to connect with the battery casing to provide safety protection for the components inside the battery, thereby improving the battery's safety performance; the insulating member 500 is used to insulate the connection between the cover plate 400 and the second connecting member 200 to reduce the occurrence of battery short circuits caused by the conductive connection between the second connecting member 200 and the cover plate 400, thereby providing safety protection for the battery; the sealing ring 600 is used to seal the inside of the battery casing to reduce interference from the external environment to the inside of the battery casing, thereby protecting the inside of the battery casing; the sealing ring 600 is sleeved on the first connecting member 100, which can reduce the contact between the first connecting member 100 and the cover plate 400, thereby reducing the occurrence of battery short circuits and improving the battery's safety performance.

[0204] It should be noted that the battery cover assembly provided in the embodiments of this application further includes an insulating spacer 700 and a lead-out piece 800. The insulating spacer 700 is disposed on the side of the cover 400 away from the second connector 200; the lead-out piece 800 is disposed on the insulating spacer 700 away from the cover 400 and is electrically connected to the first connector 100.

[0205] Understandably, the insulating spacer 700 is used to insulate the connection between the cover plate 400 and the lead-out piece 800, so as to reduce the occurrence of battery short circuits caused by the connection between the cover plate 400 and the lead-out piece 800, thereby improving the battery's safety performance; the lead-out piece 800 can increase the connection area between the tab and the first connector 100, thereby increasing the current-carrying area between the tab and the lead-out piece 800 or the first connector 100, so as to improve the battery's fast-charging performance.

[0206] It should be noted that the lead-out chip 800 has several different settings, and the following examples illustrate the settings of the lead-out chip 800.

[0207] In one feasible implementation, the lead sheet 800 is a metal part, which is connected to the first connector 100. The tab is also connected to the metal part. The metal part is used to conductively connect the tab and the first connector 100 to increase the area of ​​the connection surface between the tab and the terminal, thereby increasing the current carrying area between the tab and the terminal and improving the performance of the battery.

[0208] In another feasible implementation, the first connector 100 extends from the side opposite to the first groove 103 toward the side closer to the battery casing to form a lead-out piece 800. The first connector 100 is connected to the tab. The first connector 100 can increase the area of ​​the connection surface between the tab and the terminal, thereby increasing the current carrying area between the tab and the terminal to improve the battery performance.

[0209] Understandably, there are no restrictions on the configuration of the lead plate 800. It can be selected according to actual usage requirements, as long as the lead plate 800 is electrically connected to the tab and the first connector 100.

[0210] The embodiments of this application provide a battery, including a battery casing and a battery cover assembly provided in the above embodiments, the battery cover assembly being disposed on the battery casing.

[0211] Embodiments of this application provide a battery pack including the battery provided in any of the above embodiments.

[0212] This application also provides an electrical device, including an electrical device and a battery or battery pack as described in any of the above embodiments, wherein the battery or battery pack is used to provide electrical energy to the electrical device.

[0213] The electrical equipment in this application embodiment can be a vehicle, such as a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle, and a new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. Accordingly, the electrical device can be the vehicle's drive mechanism or the vehicle's control system.

[0214] In addition, electrical equipment can also serve as other energy storage devices, such as mobile phones, portable devices, laptops, electric toys, power tools, ships, and spacecraft. Among these, spacecraft can include airplanes, rockets, space shuttles, or spacecraft.

[0215] Since the electrical equipment in this embodiment includes the battery or battery pack described in any of the above embodiments, the structure and beneficial effects of the electrical equipment including the battery or battery pack will not be described in detail here.

[0216] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0217] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0218] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery cover assembly, characterized in that, include: The first connector (100) is a terminal post used for conductive connection with the battery cell; The second connector (200) is used for conductive connection with an external connector piece; the second connector (200) has a through hole (201), a portion of the first connector (100) is located in the through hole (201), the outer sidewall of the first connector (100) includes a first inclined surface (101), the inner sidewall of the through hole (201) includes a second inclined surface (202), and the first inclined surface (101) and the second inclined surface (202) are mutually restrictive. Along the extending direction of the through hole (201), the first connector (100) has an upper end face (102), and the outer side wall of the first connector (100) also includes a first connecting surface (104). The first connecting surface (104) extends along the extending direction of the through hole (201), and a first end of the first connecting surface (104) is connected to the upper end face (102), and a second end of the first connecting surface (104) is connected to the first end of the first inclined surface (101). Along the extending direction of the through hole (201), the second connector (200) has a bearing surface (203), and the inner sidewall of the through hole (201) further includes a second connecting surface (204). The first end of the second connecting surface (204) is connected to the bearing surface (203), and the second end of the second connecting surface (204) is connected to the first end of the second inclined surface (202). The first connecting surface (104) and the second connecting surface (204) are fitted together; Along the extending direction of the through hole (201), the first connecting surface (104) has a third height H3, which satisfies: 0.5 H1≥H3>0mm, where H1 is the distance between the second end of the first inclined surface (101) and the upper end surface (102); And / or, along the extending direction of the through hole (201), the second connecting surface (204) has a fourth height H4, the fourth height H4 satisfying: 0.5 H2≥H4>0mm, where H2 is the distance between the second end of the second inclined surface (202) and the bearing surface (203).

2. The battery cover assembly according to claim 1, characterized in that, Along a first direction, a portion of the outer wall of the first connector (100) extends toward the side closer to the second connector (200) such that a portion of the outer wall of the first connector (100) forms the first inclined surface (101), the first direction being perpendicular to the extension direction of the through hole (201).

3. The battery cover assembly according to claim 1, characterized in that, Along a first direction, a portion of the inner wall of the through hole (201) extends toward a side away from the first connector (100) such that a portion of the inner wall of the through hole (201) forms the second inclined surface (202), the first direction being perpendicular to the extension direction of the through hole (201).

4. A battery cover assembly according to claim 1, characterized in that, The first end of the first inclined surface (101) is connected to the upper end surface (102), and the second end of the first inclined surface (101) is located within the orthographic projection of the first end of the first inclined surface (101) onto the upper end surface (102); and / or, The first end of the second inclined surface (202) is connected to the bearing surface (203), and the second end of the second inclined surface (202) is located within the orthographic projection of the first end of the second inclined surface (202) onto the bearing surface (203).

5. A battery cover assembly according to claim 1, characterized in that, The first end of the first inclined surface (101) is connected to the upper end surface (102). The second end of the first inclined surface (101) is located in the orthographic projection of the first end of the first inclined surface (101) onto the upper end surface (102). There is a first distance H1 between the second end of the first inclined surface (101) and the upper end surface (102). The first distance H1 satisfies: 10mm ≥ H1 ≥ 0.15mm. And / or, the first end of the second inclined surface (202) is connected to the bearing surface (203), the second end of the second inclined surface (202) is located in the orthographic projection of the first end of the second inclined surface (202) onto the bearing surface (203), and there is a second distance H2 between the second end of the second inclined surface (202) and the bearing surface (203), the second distance H2 satisfying: 10mm≥H2≥0.15mm.

6. A battery cover assembly according to claim 1, characterized in that, The first inclined surface (101) is set at an angle to the extending direction of the through hole (201), and the angle is an acute angle; And / or, the second inclined surface (202) is set at an angle to the extension direction of the through hole (201), the angle being an acute angle.

7. A battery cover assembly according to any one of claims 1-6, characterized in that, The first inclined surface (101) has a first slope K1, and the second inclined surface (202) has a second slope K2, wherein the first slope K1 and the second slope K2 satisfy the following: K1 = K2.

8. A battery cover assembly according to any one of claims 1-6, characterized in that, The first connector (100) is a cylindrical connector, the first inclined surface (101) is a first annular inclined surface, and the second inclined surface (202) is a second annular inclined surface. The first annular inclined surface and the second annular inclined surface are configured to cooperate.

9. A battery cover assembly according to claim 8, characterized in that, The first inclined surface (101) includes two opposing first extended surfaces and two opposing first arcuate surfaces, one of the first extended surfaces being connected to one end of the two first arcuate surfaces and the other of the first extended surface being connected to the other end of the two first arcuate surfaces; The second inclined surface (202) includes two opposing second extended surfaces and two opposing second arcuate surfaces, one of the second extended surfaces being connected to one end of the two second arcuate surfaces and the other second extended surface being connected to the other end of the two second arcuate surfaces.

10. A battery cover assembly according to any one of claims 1-6, characterized in that, At least a portion of the second connector (200) protrudes beyond the first connector (100).

11. A battery cover assembly according to any one of claims 1-6, characterized in that, The first connector (100) has a first groove (103) which is formed on the upper end face (102) of the first connector (100).

12. A battery cover assembly according to claim 11, characterized in that, Along a first direction, the upper end face (102) has a first length L1; along the first direction, the first groove (103) has a second length L2; the first length L1 and the second length L2 satisfy the following: 20mm≥L1-L2>0mm, and the first direction is perpendicular to the extension direction of the through hole (201).

13. A battery cover assembly according to claim 11, characterized in that, Along the first direction, the upper end face (102) has a first length L1, the first groove (103) has a second length L2, and the first inclined surface (101) has a third extension length L3, wherein the third extension length L3 satisfies: L3≥(L1-L2) / 2; And / or, along the first direction, the second inclined surface (202) has a fourth extension length L4, the fourth extension length L4 satisfying: L4≥(L1-L2) / 2; The first direction is perpendicular to the extension direction of the through hole (201).

14. A battery cover assembly according to claim 11, characterized in that, The first groove (103) has a groove sidewall (1031) and a groove bottomwall (1032). The first connector (100) also includes a second groove (300) disposed on the groove bottomwall (1032). The second groove (300) is used for positioning.

15. A battery cover assembly according to any one of claims 1-6, characterized in that, The battery cover assembly also includes: Cover plate (400); An insulating element (500) is disposed between the cover plate (400) and the second connector (200); A sealing ring (600) is fitted onto the first connector (100) and is sealed and insulated from the cover plate (400).

16. A battery cover assembly according to claim 15, characterized in that, Also includes: An insulating spacer (700) is provided on the side of the cover plate (400) opposite to the second connector (200); A lead-out piece (800) is disposed on the insulating spacer (700) away from the cover plate (400) and is electrically connected to the first connector (100).

17. A battery, characterized in that, Includes the battery housing and the battery cover assembly according to any one of claims 1-16; The battery cover assembly is mounted on the battery housing.

18. A battery pack, characterized in that, Includes the battery described in claim 17.

19. An electrical appliance, characterized in that, It includes an electrical device and the battery of claim 17 or the battery pack of claim 18, wherein the battery or the battery pack is used to provide electrical energy to the electrical device.

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