Cover plate assembly and battery

Abstract

Provided in the embodiments of the present application are a cover plate assembly and a battery. The cover plate assembly is configured to be mounted on a battery case of a battery. The cover plate assembly comprises: a base plate, wherein the base plate is connected to the battery case and has at least one through hole and at least one annular boss; a terminal plate of the battery runs through the through hole; in a first direction, at least part of the annular boss protrudes from the outer surface of the base plate; the rotation center of the through hole is concentric with that of the annular boss; an inner annular face of the annular boss is a tapered face, and in a second direction, the annular boss is located at the side of the through hole away from the rotation center; the annular boss has a first extension face, with a first end of the first extension surface being connected to the outer surface, and a second end of the first extension surface extending toward the side close to the through hole; the first extension surface and the outer surface enclose to form an opening, which is configured to accommodate a member to be injection-molded; and the first extension face is configured to limit the movement of the member to be injection-molded in the first direction. Thus, the problem of poor connection strength between a terminal post, a connection ring and a cover plate can be solved.

Description

Cover assembly and battery

[0001] This application claims priority to Chinese Patent Application No. 202422140594.8, filed on August 30, 2024, entitled “Cover Assembly and Battery”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and in particular to a cover plate assembly and a battery. Background Technology

[0003] A battery is a device that directly converts chemical energy into electrical energy and is widely used in various electronic devices, vehicles, energy storage systems and other fields.

[0004] Existing batteries have a casing and a cover assembly. The cover assembly includes a cover, terminals, and an insulating ring. The cover is attached to the casing, and the terminals are disposed on the cover. The terminals and the cover are connected by an insulating ring.

[0005] In related technologies, there is a problem of poor connection strength among the pole, insulating ring, and cover plate. Summary of the Invention

[0006] This application provides a cover plate assembly and a battery to solve the problem of poor connection strength between the terminal post, the insulating ring and the cover plate.

[0007] In a first aspect, embodiments of this application provide a cover assembly for mounting on a battery casing, the cover assembly comprising:

[0008] A substrate for connecting a battery casing has at least one through hole and at least one annular boss; a terminal plate of the battery passes through the through hole; at least a portion of the annular boss protrudes from the outer surface of the substrate along a first direction; the rotation center of the through hole is concentric with the rotation center of the annular boss; the inner annular surface of the annular boss is a tapered surface; along a second direction, the annular boss is located on the side of the through hole away from the rotation center; the first direction and the second direction are at an angle; the second direction is parallel to the extension direction of the outer surface.

[0009] The annular boss has a first extending surface, the first end of which is connected to the outer surface, and the second end of which extends toward the side near the through hole. The first extending surface and the outer surface enclose an opening for accommodating the part to be injected, and the first extending surface is used to limit the movement of the part to be injected along a first direction.

[0010] In this cover plate assembly, at least a portion of the annular boss protrudes from the outer surface of the substrate along the first direction, increasing the connection area between the annular boss and the part to be injection molded, thereby improving the connection strength between the cover plate and the part to be injection molded. The rotation center of the through hole is concentric with the rotation center of the annular boss. Along the second direction, the annular protrusion is located on the side of the through hole away from the rotation center, ensuring that the spacing between the annular boss and the through hole is the same, thereby reducing uneven stress between the annular boss and the part to be injection molded, and improving the connection stability between the annular boss and the part to be injection molded. The first extended surface can limit the movement of the part to be injection molded along the first direction, preventing the part to be injection molded from falling out of the cover plate, thereby improving the connection strength between the part to be injection molded and the substrate. The opening formed by the first extended surface and the outer surface can accommodate the part to be injection molded, increasing the contact area between the part to be injection molded and the substrate, thereby improving the connection strength between the part to be injection molded and the substrate.

[0011] In one embodiment, the first extension surface and the outer surface are arranged at an angle α, wherein the angle α satisfies:

[0012] 5°≤α≤85°.

[0013] The cover plate assembly of this structure has an angle between the first extended surface and the outer surface, which can increase the contact area between the part to be injected and the annular boss; and can limit the movement of the part to be injected toward the side closer to the annular protrusion, so as to improve the connection strength between the part to be injected and the substrate.

[0014] In one embodiment, the second end is spaced apart from the outer surface along a first direction.

[0015] The cover plate assembly of this structure has a second end spaced apart from the outer surface, which allows the part to be injected to flow toward the first end after passing through the second end, so that the part to be injected can fill the opening between the first extension surface and the outer surface, thereby increasing the contact area between the part to be injected and the first extension surface, and improving the connection strength between the substrate and the part to be injected.

[0016] In one embodiment, the opening is narrowed along the positive direction of the second direction;

[0017] And / or, along the negative direction of the second direction, the opening is set in a constricted manner.

[0018] The cover plate assembly of this structure has a constricted opening along the positive direction of the second direction, which can limit the offset of the part to be injection molded towards the positive direction of the first and second directions; along the negative direction of the second direction, the opening is also constricted, which can limit the offset of the part to be injection molded towards the negative direction of the first and second directions, thereby improving the connection strength between the substrate and the part to be injection molded.

[0019] In one implementation, it further includes:

[0020] A sealing ring is disposed on the substrate and abuts against the inner surface of the terminal board. The sealing ring, the substrate, and the terminal board together enclose an injection space, and at least a portion of the part to be injection molded is located within the injection space.

[0021] In this cover assembly, the base plate supports the sealing ring, which isolates the base plate and the terminal plate from direct contact to provide safety protection for the battery; at least a portion of the part to be injection molded is located within the injection space, and the part to be injection molded can fill the injection space to improve the connection strength between the base plate, the sealing ring and the terminal plate.

[0022] In one embodiment, the annular boss has a second extending surface and a connecting portion;

[0023] Along the second direction, the second extension surface and the first extension surface are spaced apart;

[0024] The connecting parts are connected to the first extension surface and the second extension surface, respectively.

[0025] The cover plate assembly of this structure, with its second extended surface and connecting portion, can increase the connection area between the part to be injection molded and the annular boss, thereby increasing the contact area between the part to be injection molded and the substrate, and thus improving the connection strength between the part to be injection molded and the substrate.

[0026] In one embodiment, multiple through holes are provided, and the multiple through holes are spaced apart along the second direction;

[0027] Multiple annular bosses are provided, and along the second direction, the multiple annular bosses are spaced apart;

[0028] In a combination of multiple through holes and multiple annular bosses, one through hole and one annular boss are fitted together.

[0029] This cover assembly structure increases the number of through holes, which can increase the number of battery terminal plates to accommodate the arrangement of the positive and negative terminals, thereby reducing the space occupied by the battery casing and improving battery performance.

[0030] In one embodiment, the substrate includes a first plate and a second plate, the first plate and the second plate being connected;

[0031] The first plate is connected to the battery casing;

[0032] The second plate is connected to the terminal plate, and the through hole is made on the second plate;

[0033] An annular boss is provided on at least one of the first plate and the second plate.

[0034] The cover plate assembly of this structure, with the first plate and the second plate set separately, can reduce the processing difficulty of the substrate. Furthermore, by changing the size of the through hole in the second plate, the size of the terminal plate can be changed, thereby changing the charging and discharging performance of the battery, thus improving the fast charging performance of the battery. It can also improve the adaptability of the substrate, thereby reducing the production cost of the substrate.

[0035] In one embodiment, the annular boss is located inside the part to be injection molded.

[0036] In this cover plate assembly, the annular boss is located inside the part to be injection molded, allowing the part to surround the annular boss, thereby increasing the contact area between the part and the annular boss, and thus increasing the connection area between the part and the substrate, thereby improving the connection strength between the substrate and the part.

[0037] Secondly, embodiments of this application provide a battery, including a battery casing and a cover assembly, the cover assembly being connected to the battery casing. Attached Figure Description

[0038] Figure 1 is a schematic diagram of the main structure of the cover plate assembly provided in this application;

[0039] Figure 2 is a cross-sectional view of section AA in Figure 1 of this application;

[0040] Figure 3 is an enlarged structural diagram of point B in Figure 2 of this application;

[0041] Figure 4 is a schematic diagram of the main structure of the cover plate assembly provided in this application. Detailed Implementation

[0042] A battery is a device that directly converts chemical energy into electrical energy and is widely used in various electronic devices, vehicles, energy storage systems and other fields.

[0043] Existing batteries have a casing and a cover assembly. The cover assembly includes a cover, terminals, and an insulating ring. The cover is attached to the casing, and the terminals are disposed on the cover. The terminals and the cover are connected by an insulating ring.

[0044] In related technologies, there is a problem of poor connection strength among the pole, insulating ring, and cover plate.

[0045] The cover plate assembly provided in the embodiments of this application has, along a first direction, at least a portion of the annular boss protruding from the outer surface of the substrate, which can increase the connection area between the annular boss and the part to be injection molded, thereby improving the connection strength between the cover plate and the part to be injection molded; the rotation center of the through hole is concentrically arranged with the rotation center of the annular boss; along a second direction, the annular protrusion is located on the side of the through hole away from the rotation center, which can make the spacing between the annular boss and the through hole the same, thereby reducing the occurrence of uneven force between the annular boss and the part to be injection molded, and improving the connection stability between the annular boss and the part to be injection molded; the provision of the first extension surface can limit the movement of the part to be injection molded along the first direction, and can prevent the part to be injection molded from falling out of the cover plate, thereby improving the connection strength between the part to be injection molded and the substrate; the opening formed by the first extension surface and the outer surface can accommodate the part to be injection molded, thereby increasing the contact area between the part to be injection molded and the substrate, thereby improving the connection strength between the part to be injection molded and the substrate.

[0046] As shown in Figures 1 and 2, an embodiment of this application provides a cover plate assembly for mounting on a battery casing. The cover plate assembly includes: a substrate 100 for connecting the battery casing, the substrate 100 having at least one through hole 101 and at least one annular boss 102; a battery terminal plate 200 passing through the through hole 101; at least a portion of the annular boss 102 protruding from the outer surface 106 of the substrate 100 along a first direction X; the rotation center of the through hole 101 and the rotation center of the annular boss 102 being concentrically arranged; the inner annular surface of the annular boss 102 being a conical surface; and along a second direction, the annular boss... 102 is located on the side of the through hole 101 away from the center of rotation; the first direction X and the second direction are set at an angle; the second direction is parallel to the extension direction of the outer surface 106; the annular boss 102 has a first extension surface 1021, the first end 1022 of the first extension surface 1021 is connected to the outer surface 106, and the second end 1023 of the first extension surface 1021 extends toward the side close to the through hole 101; the first extension surface 1021 and the outer surface 106 enclose an opening, the opening is used to accommodate the injection molded part 300, and the first extension surface 1021 is used to limit the movement of the injection molded part 300 along the first direction X.

[0047] It should be noted that the inner ring surface of the annular boss 102 is a conical surface, which has the advantage of simple processing. The conical surface can guide the injection molded part 300, thereby reducing the processing difficulty of the injection molded part 300 and improving the processing efficiency of the injection molded part 300.

[0048] It should be noted that the through hole 101 and the annular boss 102 have a variety of different configuration shapes. The configuration shapes of the through hole 101 and the annular boss 102 will be illustrated with examples below.

[0049] In one embodiment, the through hole 101 is a circular hole, and the annular boss 102 is a circular boss; the circular hole and the annular boss are arranged concentrically.

[0050] It is understandable that the circular hole and the annular boss 102 have the advantage of easy processing. The terminal plate 200 adapted to the circular hole has a cylindrical structure, which can improve the processing efficiency of the through hole 101 and the terminal plate 200, thereby improving the processing efficiency of the cover plate assembly.

[0051] In another embodiment, the through hole 101 is a racetrack-shaped hole, and the annular boss 102 is a racetrack ring boss; the rotation center of the racetrack hole and the rotation center of the racetrack ring boss are concentrically arranged.

[0052] Understandably, the terminal plate 200 adapted to the raceway hole has a raceway-shaped column structure, which can increase the surface area of ​​the terminal plate 200, thereby increasing the current flow area of ​​the terminal plate 200, improving the performance of the cover plate assembly, and enhancing the battery's fast charging capability.

[0053] It should be noted that the specific shapes of the through hole 101 and the annular boss 102 are not limited and can be selected according to actual usage requirements, as long as the rotation center of the through hole 101 and the rotation center of the annular boss 102 are set concentrically.

[0054] It should be noted that the terminal plate 200 is electrically connected to the battery core through the battery tabs to form the positive or negative terminal of the battery.

[0055] It should be noted that there are several different angles between the first direction X and the second direction. Examples of the angles between the first direction X and the second direction will be given below.

[0056] In one embodiment, the first direction X and the second direction are arranged at a 90-degree angle, that is, the first direction X and the second direction are arranged perpendicularly to each other. The first direction X is parallel to the height direction of the substrate 100, and the second direction is parallel to the extension direction of the outer surface 106. This makes the processing of the annular protrusion and the through hole 101 simple, thereby improving the processing efficiency between the annular protrusion and the through hole 101.

[0057] In another embodiment, the first direction X and the second direction are arranged at a 60-degree angle, wherein the first direction X is parallel to the extension direction of the first extension surface 1021, and the second direction is parallel to the extension direction of the outer surface; this can limit the movement of the injection molded part 300 toward the annular protrusion, thereby improving the connection strength between the substrate 100 and the injection molded part 300.

[0058] It is understandable that the angle between the first direction X and the second direction is not limited and can be selected according to actual usage requirements.

[0059] It should be noted that there are several different processing methods for annular protrusions. The processing methods for annular protrusions will be illustrated with examples below.

[0060] In one embodiment, the annular protrusion is integrally formed on the substrate 100. The annular protrusion and the substrate 100 are integrally formed using an integral molding process, which has the advantages of high processing efficiency and high connection strength between the annular protrusion and the substrate 100.

[0061] In another embodiment, the annular protrusion is stamped on the substrate 100. By stamping, the material used in the substrate 100 can be reduced, thereby reducing the weight of the substrate 100 and the cover assembly, thus making the battery lighter.

[0062] In addition, in another embodiment, the annular protrusion is welded and fixed to the substrate 100. By welding and fixing the annular protrusion to the substrate 100, the installation position of the annular protrusion can be easily adjusted. The installation position of the annular protrusion can be adjusted according to the size of the injection molded part 300, which can improve the compatibility between the annular protrusion and the substrate 100.

[0063] It is understandable that there are no restrictions on the processing method of the annular protrusion, and it can be selected according to the actual use requirements, as long as the annular protrusion and the substrate 100 are fixedly connected.

[0064] It should be noted that the injection molded part 300 is processed by nano-injection molding process. The mold to be processed is attached to the substrate 100, the terminal plate 200 is located inside the mold to be processed, and then the insulating material is injected into the inside of the mold to be processed by nano-injection molding process to form the injection molded part 300.

[0065] It is understandable that the injection molded part 300 is insulated from the substrate 100 and the terminal plate 200 respectively, so as to avoid direct contact between the substrate 100 and the terminal plate 200, which could cause a short circuit in the battery, thereby providing safety protection for the battery.

[0066] As shown in Figure 3, the first extension surface 1021 and the outer surface 106 provided in the embodiment of this application are set at an angle α, and the angle α satisfies: 5°≤α≤85°.

[0067] It is understood that the first extension surface 1021 and the outer surface 106 are set at an angle, which can increase the contact area between the injection molded part 300 and the annular boss 102; and can limit the movement of the injection molded part 300 toward the side closer to the annular boss, so as to improve the connection strength between the injection molded part 300 and the substrate 100.

[0068] It should be noted that the included angle α between the first extended surface 1021 and the outer surface 106 has a variety of different ranges. The following examples illustrate the ranges of the included angle α between the first extended surface 1021 and the outer surface 106.

[0069] In one embodiment, the included angle α between the first extension surface 1021 and the outer surface 106 satisfies: 40°≤α≤85°.

[0070] It is understood that the included angle α between the first extension surface 1021 and the outer surface 106 satisfies: 40°≤α≤85°, which can increase the contact area between the injection molded part 300 and the annular boss 102; and can limit the movement of the injection molded part 300 toward the side closer to the annular protrusion, so as to improve the connection strength between the injection molded part 300 and the substrate 100.

[0071] In another embodiment, the included angle α between the first extension surface 1021 and the outer surface 106 satisfies: 5°≤α≤40°.

[0072] It is understood that the included angle α between the first extension surface 1021 and the outer surface 106 satisfies: 5°≤α≤40°, which can increase the contact area between the injection molded part 300 and the annular boss 102; and can limit the movement of the injection molded part 300 toward the side closer to the annular protrusion, so as to improve the connection strength between the injection molded part 300 and the substrate 100.

[0073] It is understandable that the range of the included angle α between the first extended surface 1021 and the outer surface 106 is not limited and can be selected according to actual usage requirements.

[0074] It should be noted that the included angle α can be set in several different degrees. Examples of the degrees for setting the included angle α are given below.

[0075] In one embodiment, the angle between the first extension surface 1021 and the outer surface 106 is 60 degrees. The first extension surface 1021 and the outer surface 106 are set at 60 degrees, which can increase the contact area between the injection molded part 300 and the annular boss 102; and can limit the movement of the injection molded part 300 toward the side closer to the annular boss, so as to improve the connection strength between the injection molded part 300 and the substrate 100.

[0076] In another embodiment, the angle between the first extension surface 1021 and the outer surface 106 is 40 degrees. The 40-degree angle between the first extension surface 1021 and the outer surface 106 can increase the contact area between the injection molded part 300 and the annular boss 102; and can limit the movement of the injection molded part 300 toward the side closer to the annular boss, so as to improve the connection strength between the injection molded part 300 and the substrate 100.

[0077] It is understandable that the angle between the first extension surface 1021 and the outer surface 106 is not limited and can be selected according to actual usage requirements, as long as the angle α between the first extension surface 1021 and the outer surface 106 satisfies: 5°≤α≤85°.

[0078] It should be noted that if the included angle between the first extension surface 1021 and the outer surface 106 is less than 5 degrees, the gap between the openings between the first extension surface 1021 and the outer surface 106 will become smaller, the contact area between the injection molded part 300 and the opening will become smaller, and the connection strength between the injection molded part 300 and the annular protrusion will become lower.

[0079] It should be noted that if the angle between the first extension surface 1021 and the outer surface 106 is greater than 85 degrees, the gap between the openings between the first extension surface 1021 and the outer surface 106 will become larger, which will result in a poorer limiting effect of the first extension surface 1021 on the injection molded part 300, and a lower connection strength between the injection molded part 300 and the annular protrusion.

[0080] It should be noted that in the cover plate assembly provided in the embodiments of this application, the second end 1023 is spaced apart from the outer surface 106 along the first direction X.

[0081] It is understandable that the second end 1023 is spaced apart from the outer surface 106, which allows the injection molded part 300 to flow toward the first end 1022 after passing through the second end 1023, so that the injection molded part 300 can fill the opening between the first extension surface 1021 and the outer surface 106, thereby increasing the contact area between the injection molded part 300 and the first extension surface 1021, and improving the connection strength between the substrate 100 and the injection molded part 300.

[0082] It should be noted that the opening is designed to be constricted, and the constriction can be directed in several different ways. Examples of the constriction directions will be given below.

[0083] In one embodiment, the opening is narrowed along the positive direction Y1 of the second direction.

[0084] It is understandable that the opening is narrowed along the positive direction Y1 of the second direction. The opening can limit the offset of the part to be injection molded 300 toward the first direction X and the positive direction Y1 of the second direction, so as to improve the connection strength between the substrate 100 and the part to be injection molded 300.

[0085] In another embodiment, the opening is narrowed along the negative direction Y2 of the second direction.

[0086] It is understandable that the opening is narrowed along the negative direction Y2 of the second direction. The opening can limit the offset of the part to be injection molded 300 toward the first direction X and the negative direction Y2 of the second direction, so as to improve the connection strength between the substrate 100 and the part to be injection molded 300.

[0087] In addition, in other embodiments, the opening is arranged in a ring shape, a portion of the opening is narrowed along the positive direction Y1 of the second direction, and another portion of the opening is narrowed along the negative direction Y2 of the second direction.

[0088] It is understood that the opening is narrowed along the positive direction Y1 of the second direction, and the opening can limit the offset of the part to be injection molded 300 towards the first direction X and the positive direction Y1 of the second direction; the opening is narrowed along the negative direction Y2 of the second direction, and the opening can limit the offset of the part to be injection molded 300 towards the first direction X and the negative direction Y2 of the second direction; so as to improve the connection strength between the substrate 100 and the part to be injection molded 300.

[0089] It should be noted that the positive direction Y1 and the negative direction Y2 of the second direction together form the second direction.

[0090] It is understandable that there are no restrictions on the direction of the narrowing; it can be selected according to actual usage needs.

[0091] The cover plate assembly provided in the embodiments of this application further includes a sealing ring 400, which is disposed on the substrate 100 and abuts against the inner plate surface of the terminal plate 200. The sealing ring 400, the substrate 100 and the terminal plate 200 together enclose an injection space, and at least a portion of the part to be injection molded 300 is located in the injection space.

[0092] It should be noted that the sealing ring 400 is used to seal the gap between the terminal block 200 and the substrate 100, and to isolate the substrate 100 and the terminal block 200.

[0093] It should be noted that the sealing ring 400 is insulated from both the substrate 100 and the terminal plate 200 to prevent short circuits caused by direct contact between the substrate 100 and the terminal plate 200, thereby providing insulation protection for the battery and extending its service life.

[0094] It should be noted that a support surface 105 is provided on the substrate 100. Along the height direction of the substrate 100, the lowest position of the annular protrusion is higher than the highest position of the support surface 105. The support surface 105 is connected to the sealing ring 400 to support the sealing ring 400.

[0095] Understandably, the substrate 100 is used to support the sealing ring 400, and the sealing ring 400 is used to isolate the substrate 100 and the terminal plate 200 from direct contact, so as to provide safety protection for the battery; at least a portion of the injection molded part 300 is located in the injection space, and the injection molded part 300 can fill the injection space to improve the connection strength between the substrate 100, the sealing ring 400 and the terminal plate 200.

[0096] It should be noted that the annular boss 102 provided in the embodiments of this application has a second extending surface 1024 and a connecting portion 1025. Along the second direction, the second extending surface 1024 and the first extending surface 1021 are spaced apart. The connecting portion 1025 is connected to the first extending surface 1021 and the second extending surface 1024 respectively.

[0097] It is understandable that the provision of the second extension surface 1024 and the connecting portion 1025 can increase the connection area between the injection molded part 300 and the annular boss 102, thereby increasing the contact area between the injection molded part 300 and the substrate 100, and thus improving the connection strength between the injection molded part 300 and the substrate 100.

[0098] The embodiments of this application provide a plurality of through holes 101, which are spaced apart along the second direction; a plurality of annular bosses 102 are provided, which are spaced apart along the second direction; and in the plurality of through holes 101 and the plurality of annular bosses 102, one through hole 101 and one annular boss 102 are provided in cooperation.

[0099] It is understandable that increasing the number of through holes 101 can increase the number of battery terminal plates 200 to accommodate the arrangement of the positive and negative terminals of the battery, thereby reducing the space occupied by the battery casing and improving the battery's performance.

[0100] It is understandable that, it should be noted that the number of through holes 101 can be set in various ways. The following are examples illustrating the number of through holes 101.

[0101] In one embodiment, two through holes 101 are provided, and two terminal plates 200 are respectively provided in the two through holes 101. One terminal plate 200 forms the positive terminal of the battery, and the other terminal plate 200 forms the negative terminal of the battery, so as to meet the normal use of the battery.

[0102] In another embodiment, four through holes 101 are provided, and four terminal plates 200 are respectively provided in the four through holes 101. Two terminal plates 200 form the two positive terminals of the battery, and the other two terminal plates 200 form the two negative terminals of the battery, so as to improve the fast charging performance of the battery and reduce the space occupied by the battery casing.

[0103] Understandably, there is no limit to the number of through holes 101 that can be set, and they can be selected according to actual usage requirements.

[0104] It should be noted that, without limiting the number of through holes 101, there is no limit to the number of annular bosses 102. It is sufficient to ensure that one through hole 101 and one annular boss 102 are set together. The annular boss 102 can improve the connection strength between the injection molded part 300 and the cover plate and limit the offset of the terminal plate 200, thereby improving the safety performance of the battery.

[0105] As shown in Figure 4, the substrate 100 provided in the embodiment of this application includes: a first plate 103 and a second plate 104, the first plate 103 and the second plate 104 are connected; the first plate 103 is connected to the battery casing; the second plate 104 is connected to the terminal plate 200, and a through hole 101 is formed on the second plate 104.

[0106] It is understandable that the separate arrangement of the first plate 103 and the second plate 104 can reduce the processing difficulty of the substrate 100, and the size of the terminal plate 200 can be changed by changing the size of the through hole 101 of the second plate 104, thereby changing the charging and discharging performance of the battery, thus improving the fast charging performance of the battery, and improving the adaptability of the substrate 100 to reduce the production cost of the substrate 100.

[0107] It should be noted that the annular boss 102 has a variety of different installation positions, and the installation positions of the annular boss 102 will be illustrated with examples below.

[0108] In one embodiment, an annular boss 102 is disposed on the first plate 103. The annular boss 102 can increase the connection area between the first plate 103 and the injection molded part 300, thereby improving the connection strength between the first plate 103 and the injection molded part 300.

[0109] In another embodiment, an annular boss 102 is disposed on the second plate 104. The annular boss 102 can increase the connection area between the second plate 104 and the injection molded part 300, thereby improving the connection strength between the second plate 104 and the injection molded part 300.

[0110] In addition, in another embodiment, two annular bosses 102 are provided, one annular boss 102 is provided on the first plate 103, and the other annular boss 102 is provided on the second plate 104; the annular boss 102 provided on the first plate 103 can increase the connection area between the first plate 103 and the injection molded part 300, thereby improving the connection strength between the first plate 103 and the injection molded part 300; the annular boss 102 provided on the second plate 104 can increase the connection area between the second plate 104 and the injection molded part 300, thereby improving the connection strength between the second plate 104 and the injection molded part 300.

[0111] Understandably, there are no restrictions on the installation position of the annular boss 102, and it can be selected according to actual usage requirements.

[0112] It should be noted that the first plate 103 and the second plate 104 are connected by welding.

[0113] The annular boss 102 provided in the embodiments of this application is located inside the injection molded part 300.

[0114] It is understandable that the annular boss 102 is located inside the injection molded part 300, which allows the injection molded part 300 to surround the annular boss 102, thereby increasing the contact area between the injection molded part 300 and the annular boss 102, thereby increasing the connection area between the injection molded part 300 and the substrate 100, and thus increasing the connection strength between the substrate 100 and the injection molded part 300.

[0115] An embodiment of this application provides a battery, including a battery casing and a cover assembly provided in the above embodiment, the cover assembly being connected to the battery casing.

[0116] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0117] The devices or elements referred to in this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0118] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0119] 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 cover plate assembly, characterized in that, For mounting on a battery, the cover assembly includes: A substrate (100) for connecting the battery housing has at least one through hole (101) and at least one annular boss (102); a terminal plate (200) of the battery passes through the through hole (101); at least a portion of the annular boss (102) protrudes from the outer surface (106) of the substrate (100) along a first direction; the rotation center of the through hole (101) is concentric with the rotation center of the annular boss (102); the inner annular surface of the annular boss (102) is a tapered surface; along a second direction, the annular boss (102) is located on the side of the through hole (101) away from the rotation center; the first direction and the second direction are at an angle; the second direction is parallel to the extension direction of the outer surface (106). The annular boss (102) has a first extending surface (1021), the first end (1022) of the first extending surface (1021) is connected to the outer surface (106), and the second end (1023) of the first extending surface (1021) extends toward the side close to the through hole (101); the first extending surface (1021) and the outer surface (106) enclose an opening, the opening is used to accommodate the injection molded part (300), and the first extending surface (1021) is used to limit the movement of the injection molded part (300) along the first direction.

2. A cover plate assembly according to claim 1, characterized in that, The first extension surface (1021) and the outer surface (106) are set at an angle α, and the angle α satisfies: 5°≤α≤85°.

3. A cover plate assembly according to claim 1, characterized in that, Along the first direction, the second end (1023) is spaced apart from the outer surface (106).

4. A cover plate assembly according to claim 1, characterized in that, Along the positive direction of the second direction, the opening is configured as a narrowing. And / or, along the negative direction of the second direction, the opening is configured as a narrowing.

5. A cover plate assembly according to claim 1, characterized in that, Also includes: A sealing ring (400) is disposed on the substrate (100) and abuts against the inner plate surface of the terminal plate (200). The sealing ring (400), the substrate (100) and the terminal plate (200) together enclose an injection space, and at least a portion of the part to be injection molded (300) is located within the injection space.

6. A cover plate assembly according to any one of claims 1-5, characterized in that, The annular boss (102) has a second extending surface (1024) and a connecting portion (1025); Along the second direction, the second extension surface (1024) and the first extension surface (1021) are spaced apart; The connecting part (1025) is connected to the first extension surface (1021) and the second extension surface (1024) respectively.

7. A cover plate assembly according to any one of claims 1-5, characterized in that, Multiple through holes (101) are provided, and the multiple through holes (101) are spaced apart along the second direction; Multiple annular protrusions (102) are provided, and the multiple annular protrusions (102) are spaced apart along the second direction; In the plurality of through holes (101) and the plurality of annular bosses (102), one through hole (101) and one annular boss (102) are provided in cooperation.

8. A cover plate assembly according to any one of claims 1-5, characterized in that, The substrate (100) includes: a first plate (103) and a second plate (104), wherein the first plate (103) and the second plate (104) are connected; The first plate (103) is connected to the battery casing; The second plate (104) is connected to the terminal plate (200), and the through hole (101) is formed on the second plate (104); The annular boss (102) is disposed on at least one of the first plate (103) and the second plate (104).

9. A cover plate assembly according to any one of claims 1-5, characterized in that, The annular boss (102) is located inside the part to be injection molded (300).

10. A battery, characterized in that, It includes a battery housing and a cover assembly as described in any one of claims 1-9, the cover assembly being connected to the battery housing.

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