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

Abstract

The invention provides a battery cover plate assembly, a battery, a battery pack and electric equipment. The battery cover plate assembly comprises a first connecting piece and a second connecting piece, the second connecting piece is provided with a through hole, 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 face, the inner side wall of the through hole comprises a second inclined face, and the first inclined face is matched with the second inclined face in a limiting mode. The problems that the stability of a battery cover plate assembly becomes poor and the service life of a battery becomes short due to the fact that a pole is large in machining and welding difficulty and poor in reliability are solved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to a battery cover assembly, a battery, a battery pack, and an electrical device. Background Art

[0002] The battery is the power source that provides power for the tool, mostly referring to the storage battery or rechargeable battery that powers electric cars, electric trains, electric bicycles, and golf carts.

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

[0004] In the related art, the poles are difficult to process and weld and have poor reliability, which results in poor stability of the battery cover assembly and a shorter service life of the battery. Summary of the invention

[0005] The embodiments of the present application provide a battery cover assembly, a battery, a battery pack and an electrical device, which can solve the problems of difficulty in processing and welding of poles and poor reliability, resulting in poor stability of the battery cover assembly and reduced service life of the battery.

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

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

[0008] a first connecting member;

[0009] The second connecting member has a through hole, part of the first connecting member is located in the through hole, the outer wall of the first connecting member includes a first inclined surface, the inner wall of the through hole includes a second inclined surface, and the first inclined surface is limitedly matched with the second inclined surface.

[0010] It can be understood that the provision of the through hole can accommodate and guide the installation of the first connecting member, and the limiting cooperation between the first inclined surface and the second inclined surface can reduce the difficulty of processing between the first connecting member and the second connecting member. The first connecting member is connected to the second connecting member by the limiting cooperation between the first inclined surface and the second inclined surface, and the relative movement of the first connecting member and the second connecting member can be limited, thereby improving the connection strength between the first connecting member and the second connecting member, so as to improve the stability of the battery cover assembly and thus extend the service life of the battery.

[0011] In a feasible embodiment, along the first direction, part of the outer wall of the first connecting member extends toward the side close to the second connecting member so that part of the outer wall of the first connecting member forms a first inclined surface, and the first direction is perpendicular to the extension direction of the through hole.

[0012] It is understandable that part of the outer wall of the first connecting member extends toward the side close to the second connecting member 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 connecting member and the second connecting member.

[0013] In a feasible embodiment, along the first direction, part of the inner wall of the through hole extends toward a side away from the first connecting member so that part of the inner wall of the through hole forms a second inclined surface, and the first direction is perpendicular to the extension direction of the through hole.

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

[0015] In a feasible implementation manner, along the extension direction of the through hole, the first connecting member has an upper end surface.

[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 on the upper end surface is located within the orthographic projection of the first end of the first inclined surface on the upper end surface; and / or,

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

[0018] It can be understood that, in the extension direction of the through hole, the orthographic projection of the second end of the first inclined surface on the upper end surface is located within the orthographic projection of the first end of the first inclined surface on the upper end surface, which can increase the extension area of ​​the first inclined surface. Along the extension direction of the through hole, the orthographic projection of the second end of the second inclined surface on the bearing surface is located within the orthographic projection of the first end of the second inclined surface on the bearing surface, which can increase the extension area of ​​the second inclined surface, thereby increasing the contact area between the first inclined surface and the second inclined surface, so as to improve the connection strength between the first connecting member and the second connecting member.

[0019] In a feasible embodiment, along the extension direction of the through hole, the first connecting member has an upper end surface, the first end of the first inclined surface is connected to the upper end surface, the orthographic projection of the second end of the first inclined surface on the upper end surface is located within the orthographic projection of the first end of the first inclined surface on the upper end surface, and there is a first spacing H1 between the second end of the first inclined surface and the upper end surface, and the first spacing H1 satisfies: 10mm≥H1≥0.15mm;

[0020] And / or, along the extension direction of the through hole, the second connecting member 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 in the orthographic projection of the bearing surface, and is located within the orthographic projection of the first end of the second inclined surface on the bearing surface, and there is a second spacing H2 between the second end of the second inclined surface and the bearing surface, and the second spacing H2 satisfies: 10mm≥H2≥0.15mm.

[0021] It can be understood that the first spacing H1 satisfies: 10mm≥H1≥0.15mm, which can increase the vertical component of the first inclined surface in the extension direction of the through hole, thereby increasing the extension height of the first connecting member, so as to increase the surface area of ​​the first inclined surface, thereby increasing the contact area at the connection between the first inclined surface and the second inclined surface, so as to improve the connection strength between the first connecting member and the second connecting member. The second spacing H2 satisfies: 10mm≥H2≥0.15mm, which can increase the vertical component of the second inclined surface and the surface area of ​​the second inclined surface, thereby increasing the extension height of the second connecting member and increasing the contact area at the connection between the first inclined surface and the second inclined surface, so as to improve the connection strength between the first connecting member and the second connecting member.

[0022] In a feasible implementation manner, the first inclined surface is arranged 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 arranged at an angle with the extension direction of the through hole, and the angle is an acute angle.

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

[0025] In a feasible embodiment, the outer side wall of the first connecting member further includes a first connecting surface, the first connecting surface extends along the extension direction of the through hole, a first end of the first connecting surface is connected to the upper end surface, and a second end of the first connecting surface is connected to the first end of the first inclined surface;

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

[0027] The first connecting surface and the second connecting surface are arranged in close contact with each other.

[0028] It can be understood that the fitting connection between the first connecting surface and the second connecting surface can limit the offset of the first connecting member and the second connecting member along the extension direction of the through hole, thereby improving the connection strength between the first connecting member and the second connecting member to extend the service life of the battery cover assembly.

[0029] In a feasible implementation, along the extension direction of the through hole, the first connecting surface has a third height H3, and the third height H3 satisfies: 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, and the fourth height H4 satisfies: 0.5*H2≥H4>0mm, where H2 is the distance between the second end of the second inclined surface and the bearing surface.

[0031] It can be understood that the third height H3 satisfies: 0.5*H1≥H3>0mm, which can enable the first connection surface to limit the displacement 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 to extend the service life of the battery cover assembly. And the space occupied by the first connection surface along the extension direction of the through hole can be reduced, thereby reducing the difficulty of connecting the first and second connectors. The fourth height H4 satisfies: 0.5*H2≥H4>0mm, which can enable the second connection surface to limit the displacement 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 to extend the service life of the battery cover assembly. And the space occupied by the second connection surface along the extension direction of the through hole can be reduced, thereby reducing the difficulty of connecting the first and second connectors.

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

[0033] K1=K2.

[0034] It can be understood 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, so that the first inclined surface and the second inclined surface can be connected to limit the movement of the first connecting member along the extension direction of the through hole, and the connection strength between the first inclined surface and the second inclined surface can be improved to improve the connection strength between the first connecting member and the second connecting member.

[0035] In a feasible implementation manner, the first connecting member is a cylindrical connecting member, 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 arranged in coordination.

[0036] It can be understood that the columnar connector can reduce the difficulty of processing the first connector, and the first annular inclined surface and the second annular inclined surface are arranged in coordination to reduce the difficulty of connecting the first connector and the second connector, so as to improve the processing efficiency of the battery cover assembly.

[0037] In a feasible implementation manner, the first inclined surface includes two opposite first extension surfaces and two opposite first arcuate surfaces, one first extension surface is connected to one end of the two first arcuate surfaces, and the other first extension surface is connected to the other end of the two first arcuate surfaces;

[0038] The second inclined surface includes two opposite second extension surfaces and two opposite second arcuate surfaces, one second extension surface is connected to one end of the two second arcuate surfaces, and the other second extension surface is connected to the other end of the two second arcuate surfaces.

[0039] It can be understood that the two opposite first extension surfaces and the two opposite first arcuate surfaces together form a first inclined surface, and the two opposite second extension surfaces and the two opposite second arcuate surfaces together form a second inclined surface. The extension area of ​​the first inclined surface and the second inclined surface can be increased to increase the surface area of ​​the contact surface between the first inclined surface and the second inclined surface, so as to increase the connection strength between the first connecting member and the second connecting member.

[0040] In a feasible implementation manner, at least a portion of the second connecting member protrudes beyond the first connecting member.

[0041] It can be understood that the arrangement of the second connecting member protruding from the first connecting member can reduce the occurrence of direct connection between the first connecting member and the connecting plate, and the arrangement of the second connecting member can increase the connection area between two adjacent batteries, thereby increasing the current-carrying area between the second connecting member and the connecting plate, so as to increase the current-carrying capacity between the second connecting member and the connecting plate, thereby improving the connection performance of the two batteries.

[0042] In a possible implementation, the first connecting member has a first groove, and the first groove is disposed on an upper end surface of the first connecting member.

[0043] It can be understood that during the assembly of the battery cover assembly, the punch is placed in the first groove, and is pushed in the axial direction of the first groove under the drive of external force. The punch will move toward the side of the notch away from the first groove. During the movement, the punch will drive the first connecting member to move toward the side close to the through hole and abut the second connecting member. The first connecting member and the second connecting member abut under the action of the impact force of the punch, thereby reducing the difficulty of connecting the first connecting member and the second connecting member.

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

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

[0046] It can be understood that the first length L1 and the second length L2 satisfy the following condition: 20mm≥L1-L2>0mm, so that the first connecting member can be moved toward the side close to the second connecting member so that the first connecting member and the second connecting member can be connected, and the connection strength between the part of the first connecting member that moves toward the second connecting member and the first connecting member can be ensured, so as to reduce the occurrence of fracture of the first connecting member due to fatigue damage, thereby improving the service life of the first connecting member and reducing the difficulty of assembly between the first connecting member and the second connecting member.

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

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

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

[0050] It can be understood that the third extension length L3 satisfies: L3 ≥ (L1-L2) / 2, which can reduce the space occupied by the first inclined surface, thereby reducing the space occupied by the first connector, and can reduce the difficulty of connecting the first connector and the second connector, so as to improve the installation efficiency of the battery cover assembly. The fourth extension length L4 satisfies: L4 ≥ (L1-L2) / 2, which can reduce the space occupied by the second inclined surface, thereby reducing the space occupied by the second connector, and can reduce the difficulty of connecting the first connector and the second connector, so as to improve the installation efficiency of the battery cover assembly.

[0051] In a feasible embodiment, the first groove has groove side walls and a groove bottom wall, and the first connecting member further includes a second groove disposed on the groove bottom wall, and the second groove is used for positioning.

[0052] It can be understood that during the assembly of the battery cover assembly, the second groove is used to assist in positioning the placement of the punch to improve the connection accuracy between the punch and the first groove, and can reduce the radial offset of the punch in the second groove, thereby improving the connection stability between the first connecting member and the second connecting member.

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

[0054] Cover plate;

[0055] An insulating member, disposed between the cover plate and the second connecting member;

[0056] The sealing ring is sleeved on the first connecting piece and is sealed and insulated with the cover plate.

[0057] It can be understood that the cover plate is used to be connected to the battery casing to safely protect the components inside the battery, thereby improving the safety performance of the battery; the insulating member is used to insulate and connect the cover plate and the second connecting member to reduce the occurrence of battery short circuit caused by the conductive connection between the second connecting member and the cover plate, thereby protecting the battery; the sealing ring is used to seal the interior of the battery casing to reduce the interference of the external environment on the interior of the battery casing, thereby protecting the interior of the battery casing; the sealing ring is sleeved on the first connecting member, which can reduce the contact between the first connecting member and the cover plate, causing the occurrence of battery short circuit, thereby improving the safety performance of the battery.

[0058] In a feasible implementation, it also includes:

[0059] An insulating spacer, arranged on a side of the cover plate away from the second connecting member;

[0060] The lead-out piece is arranged on the insulating spacer away from the cover plate and is conductively connected to the first connecting piece.

[0061] It can be understood that the insulating spacer is used to insulate the connection cover plate and the lead-out plate to reduce the occurrence of battery short circuit caused by the connection between the cover plate and the lead-out plate, thereby improving the safety performance of the battery; the provision of the lead-out plate can increase the connection area between the pole ear and the first connecting member, thereby increasing the current-carrying area between the pole ear and the lead-out plate or the first connecting member, so as to improve the fast charging performance of the battery.

[0062] A second aspect of an embodiment of the present application provides a battery, including a battery housing and a battery cover assembly;

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

[0064] A third aspect of an embodiment of the present application provides a battery pack, comprising a battery.

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

[0066] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the battery cover assembly, battery, battery pack and electrical equipment provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. 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.

[0068] Figure 1 A schematic diagram of the main structure of a battery cover assembly provided in an embodiment of the present application;

[0069] Figure 2 The second schematic diagram of the main structure of the battery cover assembly provided in the embodiment of the present application;

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

[0071] Figure 4 for Figure 3 A schematic diagram of a partial enlarged structure of the first connecting member and the second connecting member;

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

[0073] Figure 6 A schematic diagram of the main structure of the first connecting member provided in an embodiment of the present application;

[0074] Figure 7 A first schematic diagram of the main structure of the second connecting member provided in an embodiment of the present application;

[0075] Figure 8 A second schematic diagram of the main structure of the first connecting member provided in the embodiment of the present application;

[0076] Fig. 9 The second schematic diagram of the main structure of the second connecting member provided in the embodiment of the present application;

[0077] Fig.10 A schematic diagram of the exploded structure of a battery cover assembly provided in an embodiment of the present application.

[0078] Description of reference numerals:

[0079] 100 - first connecting member; 101 - first inclined surface; 102 - upper end surface; 103 - first groove; 1031 - groove side wall; 1032 - groove bottom wall; 104 - first connecting surface;

[0080] 200 - second connecting member; 201 - through hole; 202 - second inclined surface; 203 - bearing surface; 204 - second connecting surface;

[0081] 300 - second slot;

[0082] 400-cover plate;

[0083] 500-insulation parts;

[0084] 600-seal ring;

[0085] 700-insulating spacer;

[0086] 800-lead-out piece;

[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 DESCRIPTION

[0096] The battery is the power source that provides power for the tool, mostly referring to the storage battery or rechargeable battery that powers electric cars, electric trains, electric bicycles, and golf carts.

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

[0098] In the related art, the poles are difficult to process and weld and have poor reliability, which results in poor stability of the battery cover assembly and a shorter service life of the battery.

[0099] An embodiment of the present application provides a battery cover assembly, in which the provision of a through hole can accommodate and guide the installation of a first connecting member, and the limiting cooperation between the first inclined surface and the second inclined surface can reduce the difficulty of processing between the first connecting member and the second connecting member. The first connecting member is connected to the second connecting member by the limiting cooperation between the first inclined surface and the second inclined surface, and the relative movement of the first connecting member and the second connecting member can be limited, thereby improving the connection strength between the first connecting member and the second connecting member, so as to improve the stability of the battery cover assembly and thus extend the service life of the battery.

[0100] like Figure 1 and Figure 2 As shown, the battery cover assembly provided in the embodiment of the present application includes: a first connecting member 100 and a second connecting member 200, the second connecting member 200 has a through hole 201, a portion of the first connecting member 100 is located in the through hole 201, the outer wall of the first connecting member 100 includes a first inclined surface 101, the inner wall of the through hole 201 includes a second inclined surface 202, and the first inclined surface 101 and the second inclined surface 202 are limitedly matched.

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

[0102] In a feasible implementation manner, the first connecting member 100 is a copper pole, the second connecting member 200 is an aluminum pole, and the copper pole and the aluminum pole are connected.

[0103] It is understandable that the copper pole has a strong ability to withstand high temperatures, which can reduce the problem of high heat generation during fast charging of the battery, and the copper pole has a strong current capacity, which can improve the fast charging performance of the battery, thereby extending the battery's performance. The aluminum pole has the advantage of being lightweight, which can reduce the weight of the battery cover assembly, thereby reducing the overall weight of the electrical equipment, thereby improving the efficiency of electrical energy utilization.

[0104] In another feasible implementation manner, the first connecting member 100 is a gold pole, the second connecting member 200 is a silver pole, and the gold pole and the silver pole are connected.

[0105] It can be understood that the gold and silver electrodes have strong conductivity, which can improve the fast charging performance of the battery, thereby extending the battery's performance; and the gold and silver electrodes have good metal ductility, which can reduce the difficulty of connection between the gold and silver electrodes, thereby improving the processing efficiency of the battery cover assembly.

[0106] It is understandable that there is no limitation on the specific configuration of the first connecting member 100 and the second connecting member 200 , and they can be selected according to actual use requirements, and it is only necessary to ensure that the first connecting member 100 and the second connecting member 200 are connected by interference fit.

[0107] It should be noted that the through hole 201 is used to accommodate the first connecting member 100 to limit the displacement of the first connecting member 100 along the radial direction of the through hole 201, and the first inclined surface 101 and the second inclined surface 202 are limited and cooperated to limit the displacement of the first connecting member 100 along the extension direction of the through hole 201, thereby improving the connection stability between the first connecting member 100 and the second connecting member 200, thereby improving the connection strength between the first connecting member 100 and the second connecting member 200.

[0108] It should be noted that the first connector 100 is conductively connected to the battery cell through the battery tab, and the second connector 200 forms a conductive contact portion, which is used for an external connecting plate, and the connecting plate is used to connect two adjacent batteries to achieve conductive connection between the two adjacent batteries.

[0109] It should be noted that, along the first direction X, part of the outer wall of the first connecting member 100 extends toward the side close to the second connecting member 200 so that part of the outer wall of the first connecting member 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 part of the outer wall of the first connecting member 100 extends toward the side close to the second connecting member 200 to form the 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 connecting member 100 and the second connecting member 200.

[0111] It should be noted that the through hole 201 has a variety of different configuration shapes. The configuration shapes of the through hole 201 are described below with examples.

[0112] like Figure 5 As shown, in a feasible implementation manner, the through hole 201 is a circular hole, the extending 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] It can be understood that the circular hole has the advantage of being easy to open and can reduce the difficulty of connecting the first connecting member 100 and the second connecting member 200 .

[0114] In another feasible implementation manner, the through hole 201 is a waist-shaped long hole, and the first direction X is the direction from the rotation center of the waist-shaped long hole to the outer peripheral wall of the waist-shaped long hole.

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

[0116] It is understandable that there is no limitation on the shape of the through hole 201 and it can be selected according to actual use 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 connecting member 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 part of the outer wall of the second connecting member 200 extends toward the side away from the first connecting member 100 to form the 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 connecting member 100 and the second connecting member 200.

[0119] It should be noted that the first inclined surface 101 and the second inclined surface 202 can be arranged in a variety of different ways. The following will illustrate the arrangement of the first inclined surface 101 and the second inclined surface 202 in turn with examples.

[0120] like Figure 6 As shown, in a feasible embodiment, along the extension direction of the through hole 201, the first connecting member 100 has an upper end surface 102, 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 on the upper end surface 102.

[0121] It can be understood that, along the extension direction of the through hole 201, the orthographic projection of the second end of the first inclined surface 101 on the upper end surface 102 is located within the orthographic projection of the first end of the first inclined surface 101 on the upper end surface 102, which 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, so as to improve the connection strength between the first connecting member 100 and the second connecting member 200.

[0122] like Figure 7 As shown, in another feasible embodiment, along the extension direction of the through hole 201, the second connecting member 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 first end of the second inclined surface 202 on the bearing surface 203.

[0123] It can be understood that, along the extension direction of the through hole 201, the orthographic projection of the second end of the second inclined surface 202 on the bearing surface 203 is located within the orthographic projection of the first end of the second inclined surface 202 on the bearing surface 203, which 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, so as to improve the connection strength between the first connecting member 100 and the second connecting member 200.

[0124] In addition, in another feasible embodiment, along the extension direction of the through hole 201, the first connecting member 100 has an upper end surface 102, 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 in the orthographic projection of the first end of the first inclined surface 101 on the upper end surface 102. Along the extension direction of the through hole 201, the second connecting member 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 first end of the second inclined surface 202 on the bearing surface 203.

[0125] It can be understood that, in the extension direction of the through hole 201, the orthographic projection of the second end of the first inclined surface 101 on the upper end surface 102 is located within the orthographic projection of the first end of the first inclined surface 101 on the upper end surface 102, which can increase the extension area of ​​the first inclined surface 101. Along the extension direction of the through hole 201, the orthographic projection of the second end of the second inclined surface 202 on the bearing surface 203 is located within the orthographic projection of the first end of the second inclined surface 202 on the bearing surface 203, which 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, so as to improve the connection strength between the first connector 100 and the second connector 200.

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

[0127] It should be noted that, along the extension direction of the through hole 201, the first connecting member 100 has an upper end surface 102, 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 in the orthographic projection of the upper end surface 102, and when the first end of the first inclined surface 101 is located within the orthographic projection of the upper end surface 102, there is a first spacing H1 between the second end of the first inclined surface 101 and the upper end surface 102, and the first spacing H1 satisfies: 10mm≥H1≥0.15mm.

[0128] It can be understood 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 connecting member 100 to increase 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, so as to improve the connection strength between the first connecting member 100 and the second connecting member 200.

[0129] It should be noted that if the first spacing H1 is less than 0.15 mm, 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 connecting member 100 and the second connecting member 200.

[0130] It should be noted that if the first spacing H1 is greater than 10 mm, the first inclined surface 101 will be difficult to process and the space occupied by the first inclined surface 101 will be larger, thereby increasing the heating temperature of the battery and deteriorating the battery performance.

[0131] It should be noted that, along the extension direction of the through hole 201, the second connecting member 200 has a bearing surface 203, 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 in the orthographic projection of the bearing surface 203, and when the first end of the second inclined surface 202 is in the orthographic projection of the bearing surface 203, there is a second spacing H2 between the second end of the second inclined surface and the bearing surface 203, and the second spacing H2 satisfies: 10mm≥H2≥0.15mm.

[0132] It can be understood that the second spacing H2 satisfies: 10mm≥H2≥0.15mm, which can increase the vertical component of the second inclined surface 202 and the surface area of ​​the second inclined surface 202, thereby increasing the extension height of the second connecting member 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 connecting member 100 and the second connecting member 200.

[0133] It should be noted that if the second spacing H2 is less than 0.15 mm, 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 connecting member 100 and the second connecting member 200.

[0134] It should be noted that if the second spacing H2 is greater than 10 mm, the second inclined surface 202 will be difficult to process and the space occupied by the second inclined surface 202 will be larger, thereby increasing the heating temperature of the battery and deteriorating the performance of the battery.

[0135] It should be noted that there are many different configurations between the first inclined surface 101, the second inclined surface 202 and the extension direction of the through hole 201. The following examples illustrate the configurations between the first inclined surface 101, the second inclined surface 202 and the extension direction of the through hole 201.

[0136] In a feasible implementation manner, the first inclined surface 101 and the extension direction of the through hole 201 are arranged at an angle, and the angle is an acute angle.

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

[0138] It should be noted that if the angle is an obtuse angle, the space occupied by the first connecting member 100 will increase, and the setting of the obtuse angle will cause the second inclined surface 202 that cooperates with the first inclined surface 101 to be difficult to process, which will cause the installation of the first connecting member 100 and the second connecting member 200 to be difficult and the installation efficiency to be low.

[0139] It should be noted that if the angle is a right angle, the connection strength between the first inclined surface 101 and the second inclined surface 202 will be reduced, thereby causing the connection strength between the first connecting member 100 and the second connecting member 200 to deteriorate, resulting in a shorter service life of the battery cover assembly.

[0140] In another feasible implementation manner, the second inclined surface 202 is arranged at an angle to the extension direction of the through hole 201 , and the angle is an acute angle.

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

[0142] It should be noted that if the angle is an obtuse angle, the space occupied by the second connecting member 200 will increase, and the setting of the obtuse angle will cause the first inclined surface 101 that cooperates with the second inclined surface 202 to be difficult to process, which will cause the installation of the first connecting member 100 and the second connecting member 200 to be difficult and the installation efficiency to be low.

[0143] It should be noted that if the angle is a right angle, the connection strength between the first inclined surface 101 and the second inclined surface 202 will be reduced, thereby causing the connection strength between the first connecting member 100 and the second connecting member 200 to deteriorate, resulting in a shorter service life of the battery cover assembly.

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

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

[0146] It should be noted that if the angle is an obtuse angle, the space occupied by the second connecting member 200 will increase, and the setting of the obtuse angle will cause the first inclined surface 101 that cooperates with the second inclined surface 202 to be difficult to process, which will cause the installation of the first connecting member 100 and the second connecting member 200 to be difficult and the installation efficiency to be low.

[0147] It should be noted that if the angle is a right angle, the connection strength between the first inclined surface 101 and the second inclined surface 202 will be reduced, thereby causing the connection strength between the first connecting member 100 and the second connecting member 200 to deteriorate, resulting in a shorter service life of the battery cover assembly.

[0148] It is understandable that there is no limitation on the arrangement of the first inclined surface 101 , the second inclined surface 202 and the extending direction of the through hole 201 , and the arrangement can be selected according to actual use requirements.

[0149] The outer side wall of the first connecting member 100 provided in the embodiment of the present application also includes a first connecting surface 104, which extends along the extension direction of the through hole 201, and 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 side wall of the through hole 201 also includes a second connecting surface 204, and 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 arranged in a close fit.

[0150] It can be understood that the fitting connection between the first connecting surface 104 and the second connecting surface 204 can limit the offset of the first connecting member 100 and the second connecting member 200 along the extension direction of the through hole 201, thereby improving the connection strength between the first connecting member 100 and the second connecting member 200 to extend 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 , and the third height H3 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] It can be understood that the third height H3 satisfies: 0.5*H1≥H3>0mm, so that the first connection surface 104 can limit the displacement of the first connection member 100 and the second connection member 200 along the extension direction of the through hole 201, thereby improving the connection strength between the first connection member 100 and the second connection member 200 to extend the service life of the battery cover assembly. And the space occupied by the first connection surface 104 along the extension direction of the through hole 201 can be reduced, thereby reducing the connection difficulty between the first connection member 100 and the second connection member 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 extending direction of the through hole 201 will be increased, thereby making the connection between the first connecting member 100 and the second connecting member more difficult.

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

[0155] It is understandable that, by satisfying: 0.5*H≥H4>0mm, the second connection surface 204 can limit the displacement of the first connection member 100 and the second connection member 200 along the extension direction of the through hole 201, thereby improving the connection strength between the first connection member 100 and the second connection member 200 to extend the service life of the battery cover assembly. And the space occupied by the second connection surface 204 along the extension direction of the through hole 201 can be reduced, thereby reducing the connection difficulty between the first connection member 100 and the second connection member 200.

[0156] It should be noted that if the fourth height H4 is greater than 0.5*H2, the space occupied by the second connection surface 204 along the extension direction of the through hole 201 will be increased, thereby making the connection between the first connection member 100 and the second connection member 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: 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 can be understood 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, so that the first inclined surface 101 and the second inclined surface 202 can be connected to limit the movement of the first connecting member 100 along the extension direction of the through hole 201, and the connection strength between the first inclined surface 101 and the second inclined surface 202 can be improved, so as to improve the connection strength between the first connecting member 100 and the second connecting member 200.

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

[0161] It should be noted that the first connecting member 100 is a cylindrical connecting member, 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 and the second annular inclined surface are matched.

[0162] It can be understood that the columnar connector can reduce the difficulty of processing the first connector 100, and the first annular inclined surface and the second annular inclined surface are arranged in coordination to reduce the difficulty of connecting the first connector 100 and the second connector 200, so as to improve 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 are described below with examples.

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

[0165] It can be understood that the abutment between the first annular inclined surface and the second annular inclined surface can reduce the connection difficulty between the first connecting member 100 and the second connecting member 200, so as to improve the processing efficiency of the battery cover assembly.

[0166] In another feasible embodiment, the first inclined surface 101 includes two opposite first extension surfaces and two opposite first curved surfaces, one first extension surface is connected to one end of the two first curved surfaces, and the other first extension surface is connected to the other end of the two first curved surfaces; the second inclined surface 202 includes two opposite second extension surfaces and two opposite second curved surfaces, one second extension surface is connected to one end of the two second curved surfaces, and the other second extension surface is connected to the other end of the two second curved surfaces.

[0167] It can be understood that the two opposite first extension surfaces and the two opposite first curved surfaces together form the first inclined surface 101, and the two opposite second extension surfaces and the two opposite second curved surfaces together form the second inclined surface 202. The extension area of ​​the first inclined surface 101 and the second inclined surface 202 can be increased to increase the surface area of ​​the contact surface between the first inclined surface 101 and the second inclined surface 202, so as to increase the connection strength between the first connecting member 100 and the second connecting member 200.

[0168] It is understandable that there is no limitation on the configuration shapes of the first inclined surface 101 and the second inclined surface 202 , and they can be selected according to actual use requirements.

[0169] In the embodiment of the present application, at least a portion of the second connecting member 200 is provided to protrude from the first connecting member 100 .

[0170] It can be understood that the second connector 200 protrudes from the first connector 100, which can reduce the occurrence of direct connection between the first connector 100 and the connecting plate, and the setting of 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 plate, so as to increase the current-carrying capacity between the second connector 200 and the connecting plate, thereby improving the connection performance of the two batteries.

[0171] It is understandable that the conductive contact portion is disposed on the portion of the second connector 200 protruding from the first connector 100 , and 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 pole.

[0172] The first connecting member 100 provided in the embodiment of the present application has a first groove 103 , and the first groove 103 is opened on the upper end surface 102 of the first connecting member 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, and the punch is arranged 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 connecting member 100, so as to improve the connection stability between the first connecting member 100 and the second connecting member 200.

[0174] It can be understood that during the assembly of the battery cover assembly, the punch is placed in the first groove 103, and is pushed in the axial direction of the first groove 103 under the drive of external force. The punch will move toward the side of the notch away from the first groove 103. During the movement, the punch will drive the first connecting member 100 to move toward the side close to the through hole 201 and abut the second connecting member 200. The first connecting member 100 and the second connecting member 200 abut against each other under the impact force of the punch, thereby reducing the difficulty of connecting the first connecting member 100 and the second connecting member 200.

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

[0176] It can be understood that the first length L1 and the second length L2 satisfy the following condition: 20mm≥L1-L2>0mm, so that the first connecting member 100 can move toward the side close to the second connecting member 200, so that the first connecting member 100 and the second connecting member 200 can be connected, and the connection strength between the part of the first connecting member 100 that moves toward the second connecting member 200 and the first connecting member 100 can be ensured, so as to reduce the occurrence of fracture of the first connecting member 100 due to fatigue damage, thereby improving the service life of the first connecting member 100, and can reduce the difficulty of assembly between the first connecting member 100 and the second connecting member 200.

[0177] It should be noted that if the first length L1 and the second length L2 satisfy: L1-L2 is greater than 20 mm, the punch will not be able to drive the first connecting member 100 to move toward the side close to the second connecting member 200, thereby causing the first connecting member 100 and the second connecting member 200 to be unable to be connected.

[0178] It should be noted that there are various different difference relationships between the first length L1 and the second length L2. The difference relationship between the first length L1 and the second length L2 is described below with examples.

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

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

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

[0182] It can be understood that the difference L1-L2 between the first length L1 and the second length L2 is 15 mm, which allows the first connecting member 100 to move toward one side of the second connecting member 200 and abut against the second connecting member 200, and also ensures the connection strength between the moving part of the first connecting member 100 and the non-moving part of the first connecting member 100, thereby reducing the difficulty of connecting the first connecting member 100 and the second connecting member 200.

[0183] It is understandable that there is no restriction on the difference between the first length L1 and the second length L2, and it can be selected according to actual use requirements, and it is only necessary to ensure that the first length L1 and the second length L2 satisfy: 20mm≥L1-L2≥0mm.

[0184] It should be noted that, along the first direction X, the upper end surface 102 has a first length L1, the first groove 103 has a second length L2, and when 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 are exemplified below.

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

[0186] It can be understood 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 connecting member 100, and can reduce the difficulty of connecting the first connecting member 100 and the second connecting member 200, so as to improve the installation efficiency of the battery cover assembly.

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

[0188] It can be understood 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 connecting member 200, and can reduce the difficulty of connecting the first connecting member 100 and the second connecting member 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, and 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, and the fourth extension length L4 satisfies: L4 ≥ (L1-L2) / 2.

[0190] It can be understood 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 difficulty of connecting the first connector 100 and the second connector 200, so as to improve the installation efficiency of the battery cover assembly. 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 difficulty of connecting the first connector 100 and the second connector 200, so as to improve the installation efficiency of the battery cover assembly.

[0191] It can be understood that along the first direction X, the upper end surface 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 setting 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 embodiment of the present application has groove side walls 1031 and a groove bottom wall 1032 , and the first connecting member 100 further includes a second groove 300 , which is disposed on the groove bottom wall 1032 and is used for positioning.

[0193] It can be understood that during the assembly of the battery cover assembly, the second groove 300 is used to assist in positioning the placement of 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 connecting member 100 and the second connecting member 200.

[0194] It should be noted that during the assembly of the battery cover assembly, the punch moves toward the direction from the slot opening of the first slot 103 close to the slot bottom wall 1032. When the punch abuts against the slot bottom wall 1032, it pushes the first connecting member 100 to move toward the side close to the second connecting member 200, so that the first connecting member 100 abuts against the second connecting member 200, thereby improving the connection stability between the first connecting member 100 and the second connecting member 200.

[0195] It should be noted that the groove bottom wall 1032 and the groove side wall 1031 enclose a mounting cavity, and during the assembly process of the battery cover assembly, the mounting cavity is used to accommodate the punch.

[0196] It can be understood that during the assembly of the battery cover assembly, the setting of the installation cavity can guide the punch to move from the opening of the installation cavity toward one side of the groove bottom wall 1032, and limit the radial offset of the punch in the first groove 103, thereby reducing the difficulty of connection between the first connecting member 100 and the second connecting member 200.

[0197] It should be noted that the installation cavity has a variety of different configuration shapes. The configuration shapes of the installation cavity are described below with examples.

[0198] In a feasible embodiment, the installation cavity is a cylindrical cavity, and adaptively, the punch has a cylindrical head that cooperates with the cylindrical cavity; it can be understood that the cooperation between the cylindrical head and the cylindrical cavity can make the side of the first connecting member 100 away from the cylindrical head move toward the side close to the second connecting member 200, so that the first connecting member 100 is connected to the second connecting member 200.

[0199] In another feasible embodiment, the installation cavity is a conical cavity, and adaptively, the punch has a conical head that cooperates with the conical cavity; it can be understood that the cooperation between the conical head and the conical cavity can make the side of the first connecting member 100 away from the conical head move toward the side close to the second connecting member 200, so that the first connecting member 100 is connected to the second connecting member 200.

[0200] In addition, in other feasible embodiments, the side of the installation cavity close to the slot is a cylindrical cavity, and the side of the installation cavity close to the slot bottom wall 1032 is a conical cavity. Adaptively, the punch has a cylindrical head and a conical head that cooperate with the installation cavity respectively; it can be understood that the conical head can reach the conical cavity after passing through the cylindrical cavity; the cooperation between the conical head and the conical cavity can make a part of the side of the first connecting member 100 away from the conical head move toward the side close to the second connecting member 200; the cooperation between the cylindrical head and the cylindrical cavity can make the other part of the side of the first connecting member 100 away from the cylindrical head move toward the side close to the second connecting member 200, so that the first connecting member 100 is connected to the second connecting member 200.

[0201] It is understandable that there is no restriction on the shape of the installation cavity, and it can be selected according to actual use requirements, as long as the adaptability of the installation cavity and the punch is ensured.

[0202] like Fig.10 As shown, the battery cover assembly provided in the embodiment of the present application also includes: a cover 400, an insulating member 500 and a sealing ring 600, wherein the insulating member 500 is arranged between the cover 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 with the cover 400.

[0203] It can be understood that the cover plate 400 is used to connect with the battery housing to safely protect the components inside the battery, thereby improving the safety performance of the battery; the insulating member 500 is used to insulate and connect the cover plate 400 and the second connecting member 200 to reduce the occurrence of battery short circuit caused by the conductive connection between the second connecting member 200 and the cover plate 400, thereby safely protecting the battery; the sealing ring 600 is used to seal the interior of the battery housing to reduce the interference of the external environment on the interior of the battery housing, thereby protecting the interior of the battery housing; 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, resulting in the occurrence of battery short circuit, thereby improving the safety performance of the battery.

[0204] It should be noted that the battery cover assembly provided in the embodiment of the present application also includes an insulating spacer 700 and a lead-out piece 800. The insulating spacer 700 is arranged on the side of the cover 400 away from the second connecting member 200; the lead-out piece 800 is arranged on the insulating spacer 700 away from the cover 400, and is conductively connected to the first connecting member 100.

[0205] It can be understood that the insulating spacer 700 is used to insulate the connection between the cover plate 400 and the lead-out plate 800 to reduce the occurrence of battery short circuit caused by the connection between the cover plate 400 and the lead-out plate 800, thereby improving the safety performance of the battery; the provision of the lead-out plate 800 can increase the connection area between the pole ear and the first connector 100, thereby increasing the current-carrying area between the pole ear and the lead-out plate 800 or the first connector 100, so as to improve the fast charging performance of the battery.

[0206] It should be noted that the lead-out piece 800 has a variety of different configurations, and the configurations of the lead-out piece 800 are described below in turn with examples.

[0207] In a feasible embodiment, the lead-out piece 800 is a metal part, which is connected to the first connector 100, and the pole ear is connected to the metal part. The metal part is used to conductively connect the pole ear and the first connector 100 to increase the area of ​​the connection surface between the pole ear and the pole, thereby increasing the current-carrying area between the pole ear and the pole to improve the performance of the battery.

[0208] In another feasible embodiment, the first connector 100 extends from the side away from the first groove 103 toward the side close to the battery casing to form a lead-out piece 800, and the first connector 100 is connected to the pole lug. The first connector 100 can increase the area of ​​the connecting surface between the pole lug and the pole, thereby increasing the current-carrying area between the pole lug and the pole to improve the performance of the battery.

[0209] It is understandable that there is no restriction on the configuration of the lead-out piece 800 , and it can be selected according to actual use requirements, as long as it is ensured that the lead-out piece 800 is conductively connected to the electrode tab and the first connector 100 .

[0210] An embodiment of the present application provides a battery, comprising a battery housing and the battery cover assembly provided in the above embodiment, wherein the battery cover assembly is disposed on the battery housing.

[0211] An embodiment of the present application provides a battery pack, comprising the battery provided by any of the above embodiments.

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

[0213] The electrical equipment in the embodiments of the present application may be a vehicle, for example, a vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Accordingly, the electrical device may be a driving mechanism of the vehicle or a control system of the vehicle.

[0214] In addition, the electrical equipment may also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecraft, etc., among which the spacecraft may include airplanes, rockets, space shuttles or spacecraft.

[0215] In view of the fact that the electrical device in this embodiment includes the battery or battery pack described in any of the above embodiments, the electrical device includes the battery or battery pack structure and beneficial effects, and this embodiment will not be further described here.

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

[0217] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0218] 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 battery cover assembly, characterized in that: include: A first connecting member (100); A second connecting member (200), wherein the second connecting member (200) has a through hole (201), a portion of the first connecting member (100) is located in the through hole (201), an outer side wall of the first connecting member (100) comprises a first inclined surface (101), an inner side wall of the through hole (201) comprises a second inclined surface (202), and the first inclined surface (101) and the second inclined surface (202) are limitedly matched.

2. A battery cover assembly according to claim 1, characterized in that: Along a first direction, a portion of the outer wall of the first connecting member (100) extends toward a side close to the second connecting member (200), so that a portion of the outer wall of the first connecting member (100) forms the first inclined surface (101), and the first direction is perpendicular to an extension direction of the through hole (201).

3. A battery cover assembly according to claim 1, characterized in that: Along a first direction, a portion of the inner side wall of the through hole (201) extends toward a side away from the first connecting member (100), so that a portion of the inner side wall of the through hole (201) forms the second inclined surface (202), and the first direction is perpendicular to the extension direction of the through hole (201).

4. A battery cover assembly according to claim 1, characterized in that: Along the extension direction of the through hole (201), the first connecting member (100) has an upper end surface (102), the first end of the first inclined surface (101) is connected to the upper end surface (102), and the orthographic projection of the second end of the first inclined surface (101) on the upper end surface (102) is located within the orthographic projection of the first end of the first inclined surface (101) on the upper end surface (102); and / or, Along the extension direction of the through hole (201), the second connecting member (200) has a bearing surface (203), the first end of the second inclined surface (202) is connected to the bearing surface (203), and the orthographic projection of the second end of the second inclined surface (202) on the bearing surface (203) is located within the orthographic projection of the first end of the second inclined surface (202) on the bearing surface (203).

5. A battery cover assembly according to claim 1, characterized in that: Along the extension direction of the through hole (201), the first connecting member (100) has an upper end surface (102), 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 within the orthographic projection of the first end of the first inclined surface (101) on the upper end surface (102), and a first spacing H1 is provided between the second end of the first inclined surface (101) and the upper end surface (102), and the first spacing H1 satisfies: 10 mm ≥ H1 ≥ 0.15 mm; And / or, along the extension direction of the through hole (201), the second connecting member (200) has a bearing surface (203), 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 within the orthographic projection of the first end of the second inclined surface (202) on the bearing surface (203), and there is a second spacing H2 between the second end of the second inclined surface (202) and the bearing surface (203), and the second spacing H2 satisfies: 10mm≥H2≥0.15mm.

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

7. A battery cover assembly according to claim 4, characterized in that: The outer side wall of the first connecting member (100) further comprises a first connecting surface (104), the first connecting surface (104) extending along the extending direction of the through hole (201), a first end of the first connecting surface (104) connected to the upper end surface (102), and a second end of the first connecting surface (104) connected to the first end of the first inclined surface (101); The inner side wall of the through hole (201) further comprises a second connecting surface (204), a first end of the second connecting surface (204) being connected to the bearing surface (203), and a second end of the second connecting surface (204) being connected to a first end of the second inclined surface (202); The first connecting surface (104) and the second connecting surface (204) are arranged in close contact with each other.

8. A battery cover assembly according to claim 7, characterized in that: Along the extension direction of the through hole (201), the first connecting surface (104) has a third height H3, and the third height H3 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 extension direction of the through hole (201), the second connecting surface (204) has a fourth height H4, and the fourth height H4 satisfies: 0.5*H2≥H4>0mm, H2 is the distance between the second end of the second inclined surface (202) and the bearing surface (203).

9. A battery cover assembly according to any one of claims 1 to 8, characterized in that: The first inclined surface (101) has a first slope K1, and the second inclined surface (202) has a second slope K2, and the first slope K1 and the second slope K2 satisfy: K1=K2.

10. A battery cover assembly according to any one of claims 1 to 8, characterized in that: The first connecting member (100) is a columnar connecting member, 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 and the second annular inclined surface are arranged in a coordinated manner.

11. A battery cover assembly according to claim 10, characterized in that: The first inclined surface (101) comprises two opposite first extension surfaces and two opposite first arcuate surfaces, one of the first extension surfaces is connected to one end of the two first arcuate surfaces, and the other first extension surface is connected to the other end of the two first arcuate surfaces; The second inclined surface (202) comprises two opposite second extension surfaces and two opposite second arcuate surfaces, one of the second extension surfaces is connected to one end of the two second arcuate surfaces, and the other second extension surface is connected to the other end of the two second arcuate surfaces.

12. A battery cover assembly according to any one of claims 1 to 8, characterized in that: At least a portion of the second connecting member (200) is disposed protruding from the first connecting member (100).

13. A battery cover assembly according to any one of claims 1 to 8, characterized in that: The first connecting member (100) has a first groove (103), and the first groove (103) is opened on the upper end surface (102) of the first connecting member (100).

14. A battery cover assembly according to claim 13, characterized in that: Along a first direction, the upper end surface (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: 20mm≥L1-L2>0mm, and the first direction is perpendicular to the extension direction of the through hole (201).

15. A battery cover assembly according to claim 13, characterized in that: Along the first direction, the upper end surface (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, and 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, and the fourth extension length L4 satisfies: L4≥(L1-L2) / 2; The first direction is perpendicular to the extension direction of the through hole (201).

16. A battery cover assembly according to claim 13, characterized in that: The first groove (103) has a groove side wall (1031) and a groove bottom wall (1032), and the first connecting member (100) further comprises a second groove (300) disposed on the groove bottom wall (1032), and the second groove (300) is used for positioning.

17. A battery cover assembly according to any one of claims 1 to 8, characterized in that: The battery cover assembly also includes: Cover plate (400); An insulating member (500) is provided between the cover plate (400) and the second connecting member (200); The sealing ring (600) is sleeved on the first connecting member (100) and is sealed and insulatedly connected to the cover plate (400).

18. A battery cover assembly according to claim 17, characterized in that: Also includes: An insulating spacer (700) is arranged on a side of the cover plate (400) facing away from the second connecting member (200); The lead-out piece (800) is arranged on the insulating spacer (700) away from the cover plate (400) and is conductively connected to the first connecting member (100).

19. A battery, characterized in that: A battery housing and a battery cover assembly according to any one of claims 1 to 18; The battery cover assembly is installed on the battery housing.

20. A battery pack, characterized in that: A battery comprising the battery of claim 19.

21. An electrical equipment, characterized in that: It comprises an electrical device and the battery according to claim 19 or the battery pack according to claim 20, wherein the battery or the battery pack is used to provide electrical energy to the electrical device.

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