Cover plate assembly and battery

Abstract

The embodiment of the utility model provides a cover plate assembly and a battery. The cover plate assembly is used for being mounted on a battery shell of a battery, and comprises a substrate, the substrate is connected with the battery shell, and the substrate is provided with at least one through hole and at least one annular boss; a terminal plate of the battery penetrates through the through hole; in the first direction, at least part of the annular boss protrudes out of the outer surface of the base plate; the rotating center of the through hole and the rotating center of the annular boss are concentrically arranged; the inner ring face of the annular boss is a conical face, and the annular boss is located on the side, away from the rotating center, of the through hole in the second direction. The annular boss is provided with a first extending face, the first end of the first extending face is connected with the outer surface, and the second end of the first extending face extends towards the side close to the through hole. The first extension surface and the outer surface enclose to form an opening, the opening is used for accommodating a to-be-injection-molded part, and the first extension surface is used for limiting the to-be-injection-molded part to move along the first direction, so that the problem of poor connection strength among the pole, the connecting ring and the cover plate can be solved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a cover plate assembly and a battery. Background Art

[0002] A battery is a device that directly converts chemical energy into electrical energy and is widely used in various fields such as electronic devices, transportation vehicles, energy storage systems, etc.

[0003] Existing batteries have a housing and a cover plate assembly. The cover plate assembly includes a cover plate, a terminal post, and an insulating ring. The cover plate is connected to the housing, the terminal post is disposed on the cover plate, and the terminal post and the cover plate are connected through the insulating ring.

[0004] In related technologies, there is a problem of poor connection strength among the terminal post, the insulating ring, and the cover plate. Summary of the Utility Model

[0005] Embodiments of this application provide a cover plate assembly and a battery to solve the problem of poor connection strength among the terminal post, the insulating ring, and the cover plate.

[0006] In a first aspect, embodiments of this application provide a cover plate assembly for being installed on a battery housing of a battery. The cover plate assembly includes:

[0007] A base plate for connecting to the battery housing. The base plate has at least one through hole and at least one annular boss; a terminal plate of the battery passes through the through hole; along a first direction, at least a part of the annular boss protrudes from the outer surface of the base plate; the rotation center of the through hole is concentric with the rotation center of the annular boss; the inner ring surface of the annular boss is a conical surface, and along a second direction, the annular boss is located on a side of the through hole away from the rotation center; the first direction and the second direction are arranged at an angle; the second direction is parallel to the extension direction of the outer surface;

[0008] Wherein, the annular boss has a first extension surface. A first end of the first extension surface is connected to the outer surface, and a second end of the first extension surface extends towards a side close to the through hole; the first extension surface and the outer surface enclose an opening for accommodating a to-be-injected part, and the first extension surface is used for limiting the movement of the to-be-injected part along the first direction.

[0009] For the cover plate assembly of this structure, along the first direction, at least part of the annular boss protrudes 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 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, which can make the distance between the annular boss and the through hole the same, thereby reducing the occurrence of uneven stress between the annular boss and the part to be injection-molded, so as to improve the connection stability between the annular boss and the part to be injection-molded; the setting of the first extension surface can limit the movement of the part to be injection-molded along the first direction, and prevent the part to be injection-molded from disengaging from the cover plate, so as to improve the connection strength between the part to be injection-molded and the substrate; the opening formed by enclosing the first extension surface and the outer surface can accommodate the part to be injection-molded, so as to increase 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.

[0010] In a feasible implementation manner, the first extension surface and the outer surface are arranged at an included angle α, and the included angle α satisfies:

[0011] 5° ≤ α ≤ 85°.

[0012] For the cover plate assembly of this structure, the first extension surface and the outer surface are arranged at an included angle, which can increase the contact area between the part to be injection-molded and the annular boss; and can limit the movement of the part to be injection-molded toward the side close to the annular protrusion, so as to improve the connection strength between the part to be injection-molded and the substrate.

[0013] In a feasible implementation manner, along the first direction, the second end is spaced from the outer surface.

[0014] For the cover plate assembly of this structure, the second end is spaced from the outer surface, which can enable the part to be injection-molded to flow toward the first end after passing through the second end, so that the part to be injection-molded can fill the opening between the first extension surface and the outer surface, thereby increasing the contact area between the part to be injection-molded and the first extension surface, so as to improve the connection strength between the substrate and the part to be injection-molded.

[0015] In a feasible implementation manner, along the positive direction of the second direction, the opening is arranged in a constricted shape;

[0016] And / or, along the negative direction of the second direction, the opening is arranged in a constricted shape.

[0017] For the cover plate assembly of this structure, along the positive direction of the second direction, the opening is arranged in a constricted shape, and the opening can limit the offset of the part to be injection-molded toward the first direction and the positive direction of the second direction; along the negative direction of the second direction, the opening is arranged in a constricted shape, and the opening can limit the offset of the part to be injection-molded toward the first direction and the negative direction of the second direction; so as to improve the connection strength between the substrate and the part to be injection-molded.

[0018] In a feasible implementation manner, it further includes:

[0019] A sealing ring is arranged on the substrate and abuts against the inner plate surface of the terminal board. The sealing ring, the substrate, and the terminal board jointly enclose an injection molding space, and at least a part of the part to be injection molded is located in the injection molding space.

[0020] For the cover plate assembly with this structure, the substrate is used to support the sealing ring, and the sealing ring is used to isolate the direct contact between the substrate and the terminal board to provide safety protection for the battery; at least a part of the part to be injection molded is located in the injection molding space, and the part to be injection molded can fill the injection molding space to improve the connection strength between the substrate, the sealing ring, and the terminal board.

[0021] In a feasible implementation manner, the annular boss has a second extension surface and a connecting portion;

[0022] Along the second direction, the second extension surface and the first extension surface are arranged at intervals;

[0023] The connecting portion is respectively connected to the first extension surface and the second extension surface.

[0024] For the cover plate assembly with this structure, the arrangement of the second extension surface and the 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 improving the connection strength between the part to be injection molded and the substrate.

[0025] In a feasible implementation manner, a plurality of through holes are provided, and along the second direction, the plurality of through holes are arranged at intervals;

[0026] A plurality of annular bosses are provided, and along the second direction, the plurality of annular bosses are arranged at intervals;

[0027] Among the plurality of through holes and the plurality of annular bosses, one through hole and one annular boss are arranged in a matching manner.

[0028] For the cover plate assembly with this structure, increasing the number of through holes can increase the number of settings of the terminal board of the battery to meet the arrangement of the positive and negative electrodes of the battery, thereby reducing the space occupation of the battery housing and improving the use performance of the battery.

[0029] In a feasible implementation manner, the substrate includes: a first plate and a second plate, and the first plate and the second plate are connected;

[0030] The first plate is connected to the battery housing;

[0031] The second plate is connected to the terminal board, and the through hole is opened on the second plate;

[0032] The annular boss is arranged on at least one of the first plate and the second plate.

[0033] For the cover plate assembly of this structure, the first plate and the second plate are separately arranged, which can reduce the processing difficulty of the substrate, and can change the size of the terminal plate by changing the size of the through hole of the second plate, so as to change the charge and discharge performance of the battery, thereby improving the fast charging performance of the battery, and can improve the adaptability of the substrate to reduce the production cost of the substrate.

[0034] In a feasible implementation manner, the annular boss is located inside the part to be injection-molded.

[0035] For the cover plate assembly of this structure, with the annular boss located inside the part to be injection-molded, the part to be injection-molded can surround the annular boss, so as to increase the contact area between the part to be injection-molded and the annular boss, thereby increasing the connection area between the part to be injection-molded and the substrate, and improving the connection strength between the substrate and the part to be injection-molded.

[0036] In a second aspect, an embodiment of the present application provides a battery, including a battery housing and a cover plate assembly, and the cover plate assembly is connected to the battery housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0038] Figure 1 FIG. 1 is one of the schematic diagrams of the main structure of the cover plate assembly provided by the present application;

[0039] Figure 2 For the Figure 1 cross-sectional view taken along line A-A in FIG.

[0040] Figure 3 For the Figure 2 enlarged schematic view of part B in FIG.

[0041] Figure 4 FIG. 4 is the second schematic diagram of the main structure of the cover plate assembly provided by the present application.

[0042] Reference numerals:

[0043] 100 - Substrate; 101 - Through hole; 102 - Annular boss; 1021 - First extension surface; 1022 - First end; 1023 - Second end; 1024 - Second extension surface; 1025 - Connection part; 103 - First plate; 104 - Second plate; 105 - Support surface; 106 - Outer surface;

[0044] 200 - Terminal plate;

[0045] 300 - Part to be injection-molded;

[0046] 400 - Sealing ring;

[0047] α - included angle;

[0048] X - first direction;

[0049] Y1 - positive direction of the second direction; Y2 - negative direction of the second direction.

[0050] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be a more detailed description hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0051] A battery is a device that directly converts chemical energy into electrical energy and is widely used in various fields such as electronic devices, transportation vehicles, energy storage systems, etc.

[0052] Existing batteries have a housing and a cover plate assembly. The cover plate assembly includes a cover plate, a pole column, and an insulating ring. The cover plate is connected to the housing, the pole column is arranged on the cover plate, and the pole column and the cover plate are connected through the insulating ring.

[0053] In related technologies, there is a problem of poor connection strength among the pole column, the insulating ring, and the cover plate.

[0054] In the cover plate assembly provided by the embodiments of the present application, along the first direction, at least part of the annular boss protrudes 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 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, which can make the distance between the annular boss and the through - hole the same, thereby reducing the occurrence of uneven stress between the annular boss and the part to be injection - molded, so as to improve the connection stability between the annular boss and the part to be injection - molded; the setting of the first extension surface can limit the movement of the part to be injection - molded along the first direction, prevent the part to be injection - molded from disengaging from the cover plate, and improve the connection strength between the part to be injection - molded and the substrate; the opening formed by enclosing the first extension surface and the outer surface can accommodate the part to be injection - molded, so as to increase 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.

[0055] Such as Figure 1 And Figure 2As shown in the figure, an embodiment of the present application provides a cover plate assembly for installing on a battery housing of a battery. The cover plate assembly includes: a substrate 100 for connecting to the battery housing, the substrate 100 having 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; along a first direction X, at least a part of the annular boss 102 protrudes from the outer surface 106 of the substrate 100; the rotation center of the through hole 101 is concentric with the rotation center of the annular boss 102; the inner ring surface of the annular boss 102 is a conical surface, along a second direction, the annular boss 102 is located on a side of the through hole 101 away from the rotation center; the first direction X and the second direction are arranged 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, a first end 1022 of the first extension surface 1021 is connected to the outer surface 106, and a second end 1023 of the first extension surface 1021 extends toward a side close to the through hole 101; the first extension surface 1021 and the outer surface 106 enclose an opening for accommodating an injection molding part 300, and the first extension surface 1021 is used to limit the movement of the injection molding part 300 along the first direction X.

[0056] 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, and the setting of the conical surface can guide the injection molding part 300 to reduce the processing difficulty of the injection molding part 300 and improve the processing efficiency of the injection molding part 300.

[0057] It should be noted that the through hole 101 and the annular boss 102 have various different setting shapes. The setting shapes of the through hole 101 and the annular boss 102 will be exemplified below.

[0058] In a feasible embodiment, the through hole 101 is a circular hole, and the annular boss 102 is a circular ring boss; the circular hole and the circular ring boss are concentrically arranged.

[0059] It can be understood that the circular hole and the annular boss 102 have the advantage of convenient processing. The terminal plate 200 adapted to the circular hole is 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.

[0060] In another feasible embodiment, the through hole 101 is a racetrack-shaped hole, and the annular boss 102 is a racetrack-shaped ring boss; the rotation center of the racetrack hole and the rotation center of the racetrack-shaped ring boss are concentrically arranged.

[0061] It can be understood that the terminal plate 200 adapted to the racetrack hole is a racetrack-shaped column structure, which can increase the surface area of the terminal plate 200, thereby increasing the current-carrying area of the terminal plate 200 to improve the use performance of the cover plate assembly and enhance the fast charging ability of the battery.

[0062] It should be noted that there are no restrictions on the specific shapes of the through hole 101 and the annular boss 102, which can be selected according to actual usage requirements, as long as the rotation centers of the through hole 101 and the annular boss 102 are concentrically arranged.

[0063] It should be noted that the terminal board 200 is electrically connected to the electrode core of the battery through the electrode tab of the battery to form the positive or negative electrode of the battery.

[0064] It should be noted that there are various included angles between the first direction X and the second direction. The included angles between the first direction X and the second direction will be exemplified below.

[0065] In a feasible implementation manner, 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 perpendicularly arranged, the first direction X is parallel to the height direction of the substrate 100, and the second direction is parallel to the extending direction of the outer surface 106; this can simplify the processing of the annular protrusion and the through hole 101, thereby improving the processing efficiency between the annular protrusion and the through hole 101.

[0066] In another feasible implementation manner, the first direction X and the second direction are arranged at a 60-degree angle. Among them, the first direction X is parallel to the extending direction of the first extending surface 1021, and the second direction is parallel to the extending direction of the outer surface; this can limit the movement of the to-be-injected part 300 towards the annular protrusion to improve the connection strength between the substrate 100 and the to-be-injected part 300.

[0067] It can be understood that there are no restrictions on the included angle between the first direction X and the second direction, which can be selected according to actual usage requirements.

[0068] It should be noted that there are various processing methods for the annular protrusion. The processing methods of the annular protrusion will be exemplified below.

[0069] In a feasible implementation manner, the annular protrusion is integrally formed on the substrate 100. The annular protrusion and the substrate 100 use an integral forming process, which has the advantages of high processing efficiency, and the annular protrusion and the substrate 100 have a large connection strength.

[0070] In another feasible implementation manner, the annular protrusion is formed by stamping on the substrate 100. The annular protrusion is set by stamping, which can reduce the use of the material of the substrate 100, thereby reducing the weight of the substrate 100 and reducing the weight of the cover plate assembly, so as to realize the light weight of the battery.

[0071] In addition, in another feasible embodiment, the annular protrusion is fixedly welded to the substrate 100. Fixing the annular protrusion to the substrate 100 by welding can facilitate the adjustment of the installation position of the annular protrusion. The installation position of the annular protrusion can be adjusted according to the size of the part to be injection-molded 300, which can improve the adaptability between the annular protrusion and the substrate 100.

[0072] It can be understood that there is no limitation on the processing method of the annular protrusion, and it can be selected according to actual usage requirements, as long as the annular protrusion is fixedly connected to the substrate 100.

[0073] It should be noted that the part to be injection-molded 300 is processed by a nano-injection molding process. The mold to be processed is buckled on the substrate 100, and the terminal board 200 is located inside the mold to be processed. Then, the insulating material is injected into the mold to be processed by the nano-injection molding process to form the part to be injection-molded 300.

[0074] It can be understood that the part to be injection-molded 300 is insulated from the substrate 100 and the terminal board 200 respectively to avoid the occurrence of battery short circuit caused by the direct contact between the substrate 100 and the terminal board 200, thereby providing safety protection for the battery.

[0075] As Figure 3 shown, the first extension surface 1021 provided in the embodiment of the present application and the outer surface 106 are arranged at an angle α, and the angle α satisfies: 5° ≤ α ≤ 85°.

[0076] It can be understood that the first extension surface 1021 and the outer surface 106 are arranged at an angle, which can increase the contact area between the part to be injection-molded 300 and the annular boss 102; and can limit the movement of the part to be injection-molded 300 toward the side close to the annular protrusion, so as to improve the connection strength between the part to be injection-molded 300 and the substrate 100.

[0077] It should be noted that the angle α between the first extension surface 1021 and the outer surface 106 has a variety of different value ranges. The value ranges of the angle α between the first extension surface 1021 and the outer surface 106 will be exemplified below.

[0078] In a feasible embodiment, the angle α between the first extension surface 1021 and the outer surface 106 satisfies: 40° ≤ α ≤ 85°.

[0079] It can be understood that the 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 part to be injection-molded 300 and the annular boss 102; and can limit the movement of the part to be injection-molded 300 toward the side close to the annular protrusion, so as to improve the connection strength between the part to be injection-molded 300 and the substrate 100.

[0080] In another feasible implementation, the included angle α between the first extension surface 1021 and the outer surface 106 satisfies: 5° ≤ α ≤ 40°.

[0081] It can be understood that when the included angle α between the first extension surface 1021 and the outer surface 106 satisfies: 5° ≤ α ≤ 40°, the contact area between the to-be-injected part 300 and the annular boss 102 can be increased; and the movement of the to-be-injected part 300 toward the side close to the annular protrusion can be limited, so as to improve the connection strength between the to-be-injected part 300 and the substrate 100.

[0082] It can be understood that the value range of the included angle α between the first extension surface 1021 and the outer surface 106 is not restricted and can be selected according to actual usage requirements.

[0083] It should be noted that there are various different set degrees for the included angle α. The set degrees of the included angle α will be exemplified below in sequence.

[0084] In a feasible implementation, the included angle between the first extension surface 1021 and the outer surface 106 is 60 degrees. When the first extension surface 1021 and the outer surface 106 are set at 60 degrees, the contact area between the to-be-injected part 300 and the annular boss 102 can be increased; and the movement of the to-be-injected part 300 toward the side close to the annular protrusion can be limited, so as to improve the connection strength between the to-be-injected part 300 and the substrate 100.

[0085] In another feasible implementation, the included angle between the first extension surface 1021 and the outer surface 106 is 40 degrees. When the first extension surface 1021 and the outer surface 106 are set at 40 degrees, the contact area between the to-be-injected part 300 and the annular boss 102 can be increased; and the movement of the to-be-injected part 300 toward the side close to the annular protrusion can be limited, so as to improve the connection strength between the to-be-injected part 300 and the substrate 100.

[0086] It can be understood that the included angle between the first extension surface 1021 and the outer surface 106 is not restricted and can be selected according to actual usage requirements, as long as the included angle α between the first extension surface 1021 and the outer surface 106 satisfies: 5° ≤ α ≤ 85°.

[0087] 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 interval of the opening between the first extension surface 1021 and the outer surface 106 will become smaller, the contact area between the to-be-injected part 300 and the opening will become smaller, and the connection strength between the to-be-injected part 300 and the annular protrusion will become lower.

[0088] 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 interval of the opening between the first extension surface 1021 and the outer surface 106 will become larger, resulting in poor limiting effect of the first extension surface 1021 on the injection part to be molded 300, and the connection strength between the injection part to be molded 300 and the annular protrusion will become lower.

[0089] It should be noted that in the cover plate assembly provided in the embodiment of the present application, along the first direction X, the second end 1023 is arranged at an interval from the outer surface 106.

[0090] It can be understood that the second end 1023 is arranged at an interval from the outer surface 106, so that the injection part to be molded 300 can flow toward the first end 1022 after passing through the second end 1023, so that the injection part to be molded 300 can fill the opening between the first extension surface 1021 and the outer surface 106, thereby increasing the contact area between the injection part to be molded 300 and the first extension surface 1021, so as to improve the connection strength between the substrate 100 and the injection part to be molded 300.

[0091] It should be noted that the opening is arranged in a necked-down shape, and the direction of the necked-down has various different orientation manners. The direction of the necked-down will be exemplified below.

[0092] In a feasible implementation manner, along the positive direction Y1 of the second direction, the opening is arranged in a necked-down shape.

[0093] It can be understood that along the positive direction Y1 of the second direction, the opening is arranged in a necked-down shape, and the opening can limit the offset of the injection part to be 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 injection part to be molded 300.

[0094] In another feasible implementation manner, along the negative direction Y2 of the second direction, the opening is arranged in a necked-down shape.

[0095] It can be understood that along the negative direction Y2 of the second direction, the opening is arranged in a necked-down shape, and the opening can limit the offset of the injection part to be 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 injection part to be molded 300.

[0096] In addition, in other feasible implementation manners, the opening is arranged in a ring shape, a part of the opening is arranged in a necked-down shape along the positive direction Y1 of the second direction, and another part of the opening is arranged in a necked-down shape along the negative direction Y2 of the second direction.

[0097] It can be understood that along the positive direction Y1 of the second direction, the opening is provided with a reduced opening, and the opening can limit the offset of the to-be-injected part 300 towards the positive direction X of the first direction and the positive direction Y1 of the second direction; along the negative direction Y2 of the second direction, the opening is provided with a reduced opening, and the opening can limit the offset of the to-be-injected part 300 towards the positive direction X of the first direction and the negative direction Y2 of the second direction; so as to improve the connection strength between the substrate 100 and the to-be-injected part 300.

[0098] It should be noted that the positive direction Y1 of the second direction and the negative direction Y2 of the second direction together form the second direction.

[0099] It can be understood that the orientation mode of the direction of the reduced opening is not limited and can be selected according to actual use requirements.

[0100] The cover plate assembly provided by the embodiment of the present application further includes: a sealing ring 400, the sealing ring 400 is arranged on the substrate 100 and abuts and cooperates with the inner plate surface of the terminal board 200, and the sealing ring 400, the substrate 100 and the terminal board 200 jointly enclose an injection space, and at least part of the to-be-injected part 300 is located in the injection space.

[0101] It should be noted that the sealing ring 400 is used to seal the gap between the terminal board 200 and the substrate 100 and isolate the substrate 100 and the terminal board 200.

[0102] It should be noted that the sealing ring 400 is insulated and connected to the substrate 100 and the terminal board 200 respectively to isolate the occurrence of battery short circuit caused by the direct contact between the substrate 100 and the terminal board 200, thereby providing insulation protection for the battery and extending the service life of the battery.

[0103] 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, and the support surface 105 is connected to the sealing ring 400 to support the sealing ring 400.

[0104] It can be understood that the substrate 100 is used to support the sealing ring 400, and the sealing ring 400 is used to isolate the direct contact between the substrate 100 and the terminal board 200 to provide safety protection for the battery; at least part of the to-be-injected part 300 is located in the injection space, and the to-be-injected part 300 can fill the injection space to improve the connection strength between the substrate 100, the sealing ring 400 and the terminal board 200.

[0105] It should be noted that the annular boss 102 provided by the embodiment of the present application has a second extension surface 1024 and a connecting portion 1025. Along the second direction, the second extension surface 1024 and the first extension surface 1021 are arranged at intervals; the connecting portion 1025 is respectively connected to the first extension surface 1021 and the second extension surface 1024.

[0106] It can be understood that the arrangement of the second extension surface 1024 and the connecting portion 1025 can increase the connection area between the to-be-injected part 300 and the annular boss 102, thereby increasing the contact area between the to-be-injected part 300 and the substrate 100, so as to improve the connection strength between the to-be-injected part 300 and the substrate 100.

[0107] In the embodiment provided by the present application, a plurality of through holes 101 are provided, and along the second direction, the plurality of through holes 101 are arranged at intervals; a plurality of annular bosses 102 are provided, and along the second direction, the plurality of annular bosses 102 are arranged at intervals; among the plurality of through holes 101 and the plurality of annular bosses 102, one through hole 101 and one annular boss 102 are arranged in cooperation.

[0108] It can be understood that increasing the number of through holes 101 can increase the number of arrangements of the terminal plates 200 of the battery, so as to meet the arrangement of the positive and negative electrodes of the battery, thereby reducing the space occupancy of the battery housing and improving the service performance of the battery.

[0109] It should be noted that there are various different setting methods for the number of through holes 101. The number of through holes 101 will be exemplified below.

[0110] In a feasible embodiment, two through holes 101 are provided, and two terminal plates 200 are respectively arranged in the two through holes 101. One of the terminal plates 200 forms the positive electrode of the battery, and the other terminal plate 200 forms the negative electrode of the battery to meet the normal use of the battery.

[0111] In another feasible embodiment, four through holes 101 are provided, and four terminal plates 200 are respectively arranged in the four through holes 101. Two of the terminal plates 200 respectively form the two positive electrodes of the battery, and the other two terminal plates 200 respectively form the two negative electrodes of the battery to improve the fast charging performance of the battery and can reduce the space occupancy of the battery housing.

[0112] It can be understood that the number of through holes 101 is not limited and can be selected according to actual use requirements.

[0113] It should be noted that when the number of through holes 101 is not limited, the number of annular bosses 102 is not limited either. It only needs to ensure that one through hole 101 and one annular boss 102 are arranged in cooperation. The annular boss 102 can improve the connection strength between the to-be-injected part 300 and the cover plate and limit the offset of the terminal plate 200, thereby improving the safety performance of the battery.

[0114] Such as Figure 4As shown in the figure, the substrate 100 provided by the embodiment of the present application includes: a first plate 103 and a second plate 104, and the first plate 103 and the second plate 104 are connected; the first plate 103 is connected to the battery housing; the second plate 104 is connected to the terminal plate 200, and a through hole 101 is opened on the second plate 104.

[0115] It can be understood that the first plate 103 and the second plate 104 are separately provided, which can reduce the processing difficulty of the substrate 100, and can change the size of the terminal plate 200 by changing the size of the through hole 101 of the second plate 104, so as to change the charge and discharge performance of the battery, thereby improving the fast charging performance of the battery, and can improve the adaptability of the substrate 100 to reduce the production cost of the substrate 100.

[0116] It should be noted that the annular boss 102 has various different setting positions, and the setting positions of the annular boss 102 will be exemplified below.

[0117] In a feasible embodiment, the annular boss 102 is provided on the first plate 103, and the setting of the annular boss 102 can increase the connection area between the first plate 103 and the part to be injection-molded 300, so as to improve the connection strength between the first plate 103 and the part to be injection-molded 300.

[0118] In another feasible embodiment, the annular boss 102 is provided on the second plate 104, and the setting of the annular boss 102 can increase the connection area between the second plate 104 and the part to be injection-molded 300, so as to improve the connection strength between the second plate 104 and the part to be injection-molded 300.

[0119] In addition, in another feasible embodiment, two annular bosses 102 are provided, one of the annular bosses 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 part to be injection-molded 300, so as to improve the connection strength between the first plate 103 and the part to be injection-molded 300; the annular boss 102 provided on the second plate 104 can increase the connection area between the second plate 104 and the part to be injection-molded 300, so as to improve the connection strength between the second plate 104 and the part to be injection-molded 300.

[0120] It can be understood that the installation position of the annular boss 102 is not limited and can be selected according to actual use requirements.

[0121] It should be noted that the first plate 103 and the second plate 104 are connected by a welding and fixing method.

[0122] The annular boss 102 provided by the embodiment of the present application is located inside the part to be injection-molded 300.

[0123] It can be understood that the annular boss 102 is located inside the part to be injection-molded 300, which can enable the part to be injection-molded 300 to surround the annular boss 102, so as to increase the contact area between the part to be injection-molded 300 and the annular boss 102, thereby increasing the connection area between the part to be injection-molded 300 and the substrate 100, and improving the connection strength between the substrate 100 and the part to be injection-molded 300.

[0124] An embodiment of the present application provides a battery, including a battery case and the cover plate assembly provided in the above embodiment, and the cover plate assembly is connected to the battery case.

[0125] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0126] The device or element referred to in the present application or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically and precisely specified.

[0127] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of the present application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application described here, for example, can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0128] 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 them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cover plate assembly, characterized in that, A battery housing for installation on a battery, the cover assembly comprising: A substrate (100) for connecting to the battery housing, the substrate (100) having at least one through hole (101) and at least one annular boss (102); a terminal board (200) of the battery passes through the through hole (101); along a first direction, at least a part of the annular boss (102) protrudes from the outer surface (106) of the substrate (100); the rotation center of the through hole (101) is concentric with the rotation center of the annular boss (102); the inner ring surface of the annular boss (102) is a conical surface, along a second direction, the annular boss (102) is located on a side of the through hole (101) away from the rotation center; the first direction and the second direction are arranged at an angle; the second direction is parallel to the extension direction of the outer surface (106); Wherein, the annular boss (102) has a first extension surface (1021), a first end (1022) of the first extension surface (1021) is connected to the outer surface (106), and a second end (1023) of the first extension surface (1021) extends towards a side close to the through hole (101); the first extension surface (1021) and the outer surface (106) enclose an opening for accommodating a part to be injection-molded (300), and the first extension surface (1021) is used to limit the movement of the part to be injection-molded (300) along the first direction.

2. The cover plate assembly according to claim 1, wherein An angle α is provided between the first extension surface (1021) and the outer surface (106), 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 from the outer surface (106).

4. A cover plate assembly according to claim 1, wherein Along the positive direction of the second direction, the opening is a constricted opening; And / or, along the negative direction of the second direction, the opening is a constricted opening.

5. A cover plate assembly according to claim 1, characterized in that, Further comprising: A sealing ring (400) disposed on the substrate (100) and in abutting cooperation with the inner plate surface of the terminal board (200), the sealing ring (400), the substrate (100) and the terminal board (200) jointly enclose an injection-molding space, and at least a part of the part to be injection-molded (300) is located in the injection-molding space.

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

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

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), and the first plate (103) is connected to the second plate (104); The first plate (103) is connected to the battery housing; The second plate (104) is connected to the terminal plate (200), and the through hole (101) is formed in the second plate (104); The annular boss (102) is provided 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 to-be-injected part (300).

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

Images