Battery cover plate and battery

Abstract

In order to solve the problem that a nickel sheet for pack welding occupies a certain height space, the utility model provides a battery cover plate which comprises a cover plate body and a nickel sheet, a groove is formed in the cover plate body and extends from the edge of the cover plate body to the center of the cover plate body, one end of the nickel sheet is arranged in the groove, and the other end of the nickel sheet extends out of the groove; according to the battery cover plate, the groove is formed in the cover plate body and extends from the edge of the cover plate body to the center of the cover plate body, and one end of the nickel sheet is arranged in the groove, so that the thickness of the nickel sheet exceeding the battery cover plate is reduced, the height space occupied by the nickel sheet during pack can be optimized, the volume of the battery cover plate is reduced, and the volume of a battery cell is increased; and the size of the battery cell is as large as possible, so that the energy density of the battery cell is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover and a battery. Background Art

[0002] With the development of steel shell button batteries, the terminal pursues higher energy density of battery cells. Under the existing technology, after the steel shell button batteries are manufactured, they still need to be connected to the terminal products through Pack (combined battery). The nickel sheet welded by the pack occupies a certain height space, making the original design height of the battery cell insufficient, which limits the energy density of the steel shell button batteries to a certain extent. Therefore, how to overcome the above-mentioned technical problems and defects has become a key issue that needs to be solved. Utility Model Content

[0003] Aiming at the problem that the nickel sheets welded in the existing pack occupy a certain height space, the utility model provides a battery cover and a battery.

[0004] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0005] On one hand, the utility model provides a battery cover, comprising a cover body and a nickel sheet, wherein the cover body is provided with a groove, the groove extending from the edge of the cover body toward the center of the cover body, one end of the nickel sheet is arranged in the groove, and the other end of the nickel sheet extends out of the groove.

[0006] Optionally, the depth of the groove is a, and the value range of a is 0.05-0.1 mm.

[0007] Optionally, the cover body includes a stacked upper cover component and a lower cover component, the upper cover component and the lower cover component are insulated from each other, and the groove is arranged on the surface of the cover component; the lower cover component is provided with a first through hole, and the cover component is provided with a positive terminal at a position corresponding to the first through hole, the positive terminal is connected to the cover component and extends in a direction perpendicular to the plane where the cover component is located, and the positive terminal is embedded in the first through hole.

[0008] Optionally, it also includes an insulating layer, which includes an insulating pad and an insulating cylinder; the insulating pad is provided with a second through hole at a position corresponding to the first through hole, the insulating cylinder is connected to the circumference of the second through hole and extends in a direction perpendicular to the plane where the insulating pad is located, the insulating pad is arranged between the lower component of the cover plate and the upper component of the cover plate, and the insulating cylinder is sleeved between the inner wall of the first through hole and the outer wall of the positive terminal.

[0009] Optionally, the thickness of the component on the cover plate is b, and the value range of b is b≥0.1 mm.

[0010] Optionally, insulating tape is attached to a side of the lower cover component facing away from the upper cover component.

[0011] Another aspect of the utility model provides a battery, comprising the battery cover, battery housing and battery core as described above, wherein the battery core is arranged in the battery housing, and the battery cover is used to seal the battery housing.

[0012] According to the battery cover provided by the utility model, a groove is provided on the cover body, and the groove extends from the edge of the cover body toward the center of the cover body. One end of the nickel sheet is arranged in the groove, and the thickness of the nickel sheet exceeding the battery cover is reduced. The height space occupied by the nickel sheet during packing can be optimized, thereby reducing the volume of the battery cover, and then increasing the volume of the battery cell, making the size of the battery cell as large as possible, and increasing the energy density of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a battery cover provided by an embodiment of the utility model;

[0014] Figure 2 yes Figure 1 A is a magnified schematic diagram of the local structure;

[0015] Figure 3 It is a structural schematic diagram of a battery provided by an embodiment of the utility model;

[0016] The reference numerals in the drawings of the specification are as follows:

[0017] 1-cover body; 11-cover upper component; 111-groove; 112-positive terminal; 12-cover lower component; 121-first through hole; 2-nickel sheet; 3-insulating layer; 31-insulating pad; 311-second through hole; 32-insulating cylinder; 4-insulating tape; 5-battery shell; 6-battery cell. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] In the description of the present invention, it should be understood that the terms "side", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-2 As shown, in one embodiment, the utility model provides a battery cover, including a cover body 1 and a nickel sheet 2, the cover body 1 is provided with a groove 111, the groove 111 extends from the edge of the cover body 1 toward the center of the cover body 1, one end of the nickel sheet 2 is arranged in the groove 111, and the other end of the nickel sheet 2 extends out of the groove 111.

[0022] The present application provides a groove 111 on the cover body 1, and the groove 111 extends from the edge of the cover body 1 toward the center of the cover body 1. One end of the nickel sheet 2 is set in the groove 111 to reduce the thickness of the nickel sheet 2 exceeding the battery cover. The height space occupied by the nickel sheet 2 during packing can be optimized, thereby reducing the volume of the battery cover, and then increasing the volume of the battery cell 6. The size of the battery cell 6 is made as large as possible, thereby increasing the energy density of the battery cell 6.

[0023] The shape of the groove 111 of the present application is the same as that of the nickel sheet 2 , and can be a long strip or an arc.

[0024] The specific operation is: placing the nickel sheet 2 in the groove 111 to perform laser welding, tin welding, etc.

[0025] like Figure 1-2 As shown, in one embodiment, the depth of the groove 111 is a, and the value range of a is 0.05-0.1 mm.

[0026] Since the thickness of the nickel sheet 2 commonly used in the market ranges from 0.05 to 0.1 mm, in a preferred embodiment, the thickness of the nickel sheet 2 is greater than or equal to the depth of the groove 111 .

[0027] like Figure 1-2 As shown, in one embodiment, the cover body 1 includes a stacked cover upper component 11 and a cover lower component 12, the cover upper component 11 and the cover lower component 12 are insulated from each other, and a groove 111 is arranged on the surface of the cover upper component 11; a first through hole 121 is provided on the cover lower component 12, and a positive terminal 112 is provided on the cover upper component 11 at a position corresponding to the first through hole 121, the positive terminal 112 is connected to the cover upper component 11 and extends in a direction perpendicular to the plane where the cover upper component 11 is located, and the positive terminal 112 is embedded in the first through hole 121.

[0028] Specifically, the cover upper component 11 and the cover lower component 12 have the same length, and the material of the cover upper component 11 and the cover lower component 12 can be aluminum and its alloys, magnesium and its alloys, iron and its alloys, nickel and its alloys or copper and its alloys as needed.

[0029] Furthermore, the first through hole 121 is a square through hole, a cylindrical through hole, a prismatic through hole or other irregular through hole; the first through hole 121 and the positive terminal 112 are coaxially arranged, and the circumference of the first through hole 121 is greater than the circumference of the positive terminal 112, so that the outer wall of the positive terminal 112 does not contact the inner wall of the first through hole 121.

[0030] like Figure 1-2 As shown, in one embodiment, it also includes an insulating layer 3, and the insulating layer 3 includes an insulating pad 31 and an insulating cylinder 32; the insulating pad 31 is provided with a second through hole 311 at a position corresponding to the first through hole 121, and the insulating cylinder 32 is connected to the circumference of the second through hole 311 and extends in a direction perpendicular to the plane where the insulating pad 31 is located, and the insulating pad 31 is arranged between the lower cover component 12 and the upper cover component 11, and the insulating cylinder 32 is sleeved between the inner wall of the first through hole 121 and the outer wall of the positive terminal 112.

[0031] Specifically, the first through hole 121 is a square through hole, a cylindrical through hole, a prismatic through hole or other irregular through holes; the outer shape of the second through hole 311 is a square through hole, a cylindrical through hole, a prismatic through hole or other irregular through holes; the outer shape of the second through hole 311 is the same as the shape of the first through hole 121; the inner shape of the second through hole 311 is the same as the outer shape of the positive terminal 112; the first through hole 121, the second through hole 311 and the positive terminal 112 are coaxially arranged;

[0032] Specifically, the insulating pad 31 and the insulating cylinder 32 are integrally formed by injection molding, and the insulating pad 31 is arranged between the lower cover component 12 and the upper cover component 11, thereby isolating the lower cover component 12 and the upper cover component 11 to play an insulating role; the insulating cylinder 32 is sleeved between the inner wall of the first through hole 121 and the outer wall of the positive terminal 112, thereby isolating the first through hole 121 and the positive terminal 112 to play an insulating role.

[0033] like Figure 1-2 As shown, in one embodiment, the thickness of the cover plate component 11 is b, and the value range of b is b≥0.1 mm.

[0034] The thickness of the component 11 on the cover plate is greater than the depth of the groove 111 , so that when the groove 111 is punched or etched on the component 11 on the cover plate, the strength of the component 11 on the cover plate is not affected.

[0035] like Figure 1-2 As shown, in one embodiment, an insulating tape 4 is attached to the side of the cover lower component 12 facing away from the cover upper component 11 .

[0036] Specifically, the insulating tape 4 includes one or more of polyvinyl chloride (PVC) insulating tape, cross-linked polyethylene (XLPE) insulating tape, rubber insulating tape, acrylic insulating tape, foam insulating tape, and polyester insulating tape.

[0037] The insulating tape 4 is attached to the side of the lower cover component 12 away from the upper cover component 11, which serves as a barrier to the battery cell 6. Since the lower cover component 12 is made of metal material, the insulating tape 4 can serve as an insulator to avoid electrical connection between the lower cover component 12 and the battery cell 6.

[0038] Specifically, the manufacturing process of the battery cover is as follows: a groove 111 is punched out on the surface of the upper cover component 11, the insulating layer 3 and the lower cover component 12 are hot-pressed and composited by hot pressing, and then the insulating layer 3 and the upper cover component 11 are hot-pressed and composited by hot pressing; insulating tape 4 is attached to the lower surface of the lower cover component 12, and the manufacturing of the battery cover is completed.

[0039] like Figure 3 As shown, the utility model provides a battery on the other hand, including the above-mentioned battery cover, battery housing 5 and battery core 6, the battery core 6 is arranged in the battery housing 5, and the battery cover is used to seal the battery housing 5.

[0040] In some embodiments, the battery housing 5 is a square housing, a cylindrical housing, a prismatic housing or other irregular housings.

[0041] Specifically, the manufacturing process of the battery is as follows: the battery cell 6 is connected to the battery shell 5 and the battery cover by laser welding, resistance welding, ultrasonic welding, etc.; the assembled battery cell 6 is baked; the baked battery cell 6 is injected with liquid; after the injection is completed, the battery cover is sealed with the battery shell 5 by laser welding; finally, the nickel sheet 2 is welded through the groove 111 reserved in the battery cover to complete the pack.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cover, characterized in that: It includes a cover body and a nickel sheet. The cover body is provided with a groove, which extends from the edge of the cover body toward the center of the cover body. One end of the nickel sheet is arranged in the groove, and the other end of the nickel sheet extends out of the groove.

2. The battery cover according to claim 1, characterized in that: The depth of the groove is a, and the value range of a is 0.05-0.1 mm.

3. The battery cover according to claim 1, characterized in that: The cover body includes a stacked cover upper component and a cover lower component, the cover upper component and the cover lower component are insulated from each other, and the groove is arranged on the surface of the cover upper component; the lower cover component is provided with a first through hole, and the cover upper component is provided with a positive terminal at a position corresponding to the first through hole, the positive terminal is connected to the cover upper component and extends in a direction perpendicular to the plane where the cover upper component is located, and the positive terminal is embedded in the first through hole.

4. The battery cover according to claim 3, characterized in that: It also includes an insulating layer, which includes an insulating pad and an insulating cylinder; the insulating pad is provided with a second through hole at a position corresponding to the first through hole, the insulating cylinder is connected to the circumference of the second through hole and extends in a direction perpendicular to the plane where the insulating pad is located, the insulating pad is arranged between the lower component of the cover plate and the upper component of the cover plate, and the insulating cylinder is sleeved between the inner wall of the first through hole and the outer wall of the positive terminal.

5. The battery cover according to claim 3, characterized in that: The thickness of the component on the cover plate is b, and the value range of b is b≥0.1 mm.

6. The battery cover according to claim 3, characterized in that: Insulating tape is attached to the side of the lower cover component facing away from the upper cover component.

7. A battery, characterized in that: It comprises a battery cover, a battery shell and a battery cell as described in any one of claims 1 to 6, wherein the battery cell is arranged in the battery shell, and the battery cover is used to seal the battery shell.

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