Battery shell and battery

Abstract

In order to solve the problem that liquid injection space of an inner cavity of an existing roll core is insufficient, the utility model provides a battery shell, a plurality of grooves are formed in the side wall and the bottom of the inner side of the battery shell, and the grooves are used for storing electrolyte; according to the utility model, the plurality of grooves are formed in the side wall and the bottom of the inner side of the battery shell; the groove can be used for storing electrolyte; therefore, the space gap of the inner cavity of the button type battery cell can be increased, the production yield is increased, and the battery cell performance is optimized.

Description

Technical Field

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

[0002] As the energy density of button-type batteries required by terminal products at this stage is getting higher and higher, the capacity requirements per unit volume are getting higher and higher, resulting in more and more active materials in the battery cell cavity and larger and larger cores. As a result, there is insufficient space for liquid injection in the core cavity, which is prone to poor liquid retention and liquid overflow, which is not conducive to the production and performance of the battery cell. 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 existing inner cavity of a winding core has insufficient liquid injection space, the utility model provides a battery housing 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 housing, wherein the side wall and the bottom of the inner side of the battery housing are both provided with a plurality of grooves, and the grooves are used for storing electrolyte.

[0006] Optionally, the center distance between two adjacent grooves is a, and the value range of a is 0.5-1 mm; the depth of the groove is b, and the value range of b is 0.02-0.05 mm.

[0007] Optionally, the thickness of the battery shell is c, and the value range of c is 0.1-0.15mm.

[0008] Optionally, the shape of the groove is selected from one or more of a rectangle, a square, a diamond, a polygon or a circle.

[0009] Another aspect of the utility model provides a battery, comprising the battery housing, battery cover 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.

[0010] Optionally, the battery cover includes an upper cover assembly and a lower cover assembly that are stacked, and the upper cover assembly and the lower cover assembly are insulated from each other.

[0011] Optionally, a first through hole is provided on the lower component of the cover plate, and a positive terminal is provided on the upper component of the cover plate at a position corresponding to the first through hole. The positive terminal is connected to the component on the cover plate and extends in a direction perpendicular to the plane where the component on the cover plate is located, and the positive terminal is embedded in the first through hole.

[0012] 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.

[0013] Optionally, insulating tape is attached to a side of the lower cover component facing away from the upper cover component.

[0014] Optionally, the insulating tape is selected from one or more of polyvinyl chloride insulating tape, cross-linked polyethylene insulating tape, rubber insulating tape, acrylic insulating tape, foam insulating tape, and polyester insulating tape.

[0015] According to the battery cover provided by the utility model, a plurality of grooves are provided on the side wall and the bottom inside the battery shell; the grooves can store electrolyte; thereby increasing the space gap in the inner cavity of the button-type battery cell, increasing the production yield, and optimizing the battery cell performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a battery provided by an embodiment of the utility model;

[0017] Figure 2 yes Figure 1 A is a magnified schematic diagram of the local structure;

[0018] The reference numerals in the drawings of the specification are as follows:

[0019] 1-battery housing; 11-groove; 2-battery cover; 21-cover upper assembly; 22-cover lower assembly; 221-first through hole; 3-insulating layer; 31-insulating pad; 311-second through hole; 32-insulating cylinder; 4-insulating tape; 5-battery cell. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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.

[0023] like Figure 1-2 As shown, in one embodiment, the utility model provides a battery housing 1, wherein the inner side wall and the bottom of the battery housing 1 are provided with a plurality of grooves 11, and the grooves 11 are used to store electrolyte.

[0024] As the energy density of button-type batteries 5 is increasingly required by terminal products at this stage, the capacity requirement per unit volume is increasingly higher, resulting in more and more active substances in the inner cavity of the battery cell 5, and the battery cell 5 is getting larger and larger. As a result, there is insufficient space for liquid injection in the inner cavity of the battery cell 5, which is prone to poor liquid retention and liquid overflow, which is not conducive to the production and performance of the battery cell 5.

[0025] By providing a plurality of grooves 11 on the inner side wall and bottom of the battery housing 1 ; the grooves 11 can store electrolyte; thereby increasing the space gap in the inner cavity of the button-type battery cell 5 , increasing the production yield, and optimizing the performance of the battery cell 5 .

[0026] like Figure 1-2 As shown, in one embodiment, the center distance between two adjacent grooves 11 is a, and the value range of a is 0.5-1 mm. The depth of the groove 11 is b, and the value range of b is 0.02-0.05 mm.

[0027] In one embodiment, the value range of a is 0.6-0.8 mm. Specifically, the value range of a is any point value among 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm or 1 mm, or a range value consisting of any two point values.

[0028] In one embodiment, the value range of b is 0.03-0.04 mm. Specifically, the value range of b is any point value among 0.02 mm, 0.03 mm, 0.04 mm or 0.05 mm, or a range value consisting of any two point values.

[0029] like Figure 1-2 As shown, in one embodiment, the thickness of the battery housing 1 is c, and the value range of c is 0.1-0.15 mm.

[0030] In one embodiment, the value range of c is 0.11-0.14 mm. Specifically, the value range of c is any point value among 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm or 0.15 mm, or a range value consisting of any two point values.

[0031] Specifically, the depth of the groove 11 is smaller than the thickness of the battery housing 1 , thereby ensuring that the groove 11 can be punched or etched on the battery housing 1 without affecting the strength of the battery housing 1 .

[0032] like Figure 1-2 As shown, in one embodiment, the shape of the groove 11 is selected from one or more of a rectangle, a square, a diamond, a polygon or a circle.

[0033] like Figure 1-2 As shown, in one embodiment, the utility model provides a battery on the other hand, including the battery housing 1, the battery cover 2 and the battery cell 5 as described above, the battery cell 5 is arranged in the battery housing 1, and the battery cover 2 is used to seal the battery housing 1.

[0034] In some embodiments, the battery housing 1 is a square housing, a cylindrical housing, a prismatic housing or other irregular housings.

[0035] Specifically, the manufacturing process of the battery is as follows: the battery cell 5 is connected to the battery shell 1 and the battery cover 2 by laser welding, resistance welding, ultrasonic welding, etc.; the assembled battery cell 5 is baked; the baked battery cell 5 is injected with liquid; after the injection is completed, the battery cover 2 is sealed with the battery shell 1 by laser welding.

[0036] like Figure 1-2 As shown, in one embodiment, the battery cover plate 2 includes a cover plate upper component 21 and a cover plate lower component 22 which are stacked, and the cover plate upper component 21 and the cover plate lower component 22 are insulated from each other.

[0037] Specifically, the cover upper component 21 and the cover lower component 22 have the same length, and the material of the cover upper component 21 and the cover lower component 22 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.

[0038] like Figure 1-2 As shown, in one embodiment, a first through hole 221 is provided on the lower cover component 22, and a positive terminal is provided on the upper cover component 21 at a position corresponding to the first through hole 221, the positive terminal is connected to the upper cover component 21 and extends in a direction perpendicular to the plane where the upper cover component 21 is located, and the positive terminal is embedded in the first through hole 221.

[0039] Specifically, the first through hole 221 is a square through hole, a cylindrical through hole, a prismatic through hole or other irregular through hole; the first through hole 221 and the positive terminal are coaxially arranged, and the circumference of the first through hole 221 is greater than the circumference of the positive terminal, so that the outer wall of the positive terminal does not contact the inner wall of the first through hole 221.

[0040] 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 221, 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 22 and the upper cover component 21, and the insulating cylinder 32 is sleeved between the inner wall of the first through hole 221 and the outer wall of the positive terminal.

[0041] Specifically, the first through hole 221 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 221; the inner shape of the second through hole 311 is the same as the outer shape of the positive terminal; the first through hole 221, the second through hole 311 and the positive terminal are coaxially arranged;

[0042] 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 22 and the upper cover component 21, thereby isolating the lower cover component 22 and the upper cover component 21 to play an insulating role; the insulating cylinder 32 is sleeved between the inner wall of the first through hole 221 and the outer wall of the positive terminal, thereby isolating the first through hole 221 and the positive terminal to play an insulating role.

[0043] like Figure 1-2As shown, in one embodiment, an insulating tape 4 is attached to the side of the cover lower component 22 facing away from the cover upper component 21 .

[0044] The insulating tape 4 is attached to the side of the lower cover component 22 away from the upper cover component 21 to serve as a barrier for the battery cell 5. Since the lower cover component 22 is made of metal material, the insulating tape 4 can serve as an insulator to avoid electrical connection between the lower cover component 22 and the battery cell 5.

[0045] like Figure 1-2 As shown, in one embodiment, the insulating tape 4 is selected from one or more of polyvinyl chloride insulating tape, cross-linked polyethylene insulating tape, rubber insulating tape, acrylic insulating tape, foam insulating tape, and polyester insulating tape.

[0046] Specifically, the manufacturing process of the battery cover 2 is as follows: a groove 11 is punched out on the surface of the upper cover component 21, the insulating layer 3 and the lower cover component 22 are hot-pressed and composited by hot pressing, and then the insulating layer 3 and the upper cover component 21 are hot-pressed and composited by hot pressing; insulating tape 4 is attached to the lower surface of the lower cover component 22, and the manufacturing of the battery cover 2 is completed.

[0047] 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 housing, characterized in that: The side wall and the bottom of the inner side of the battery housing are both provided with a plurality of grooves, and the grooves are used to store electrolyte.

2. The battery housing according to claim 1, characterized in that: The center distance between two adjacent grooves is a, and the value range of a is 0.5-1 mm. The depth of the groove is b, and the value range of b is 0.02-0.05 mm.

3. The battery housing according to claim 2, characterized in that: The thickness of the battery shell is c, and the value range of c is 0.1-0.15mm.

4. The battery housing according to claim 1, characterized in that: The shape of the groove is selected from one or more of a rectangle, a square, a rhombus, a polygon or a circle.

5. A battery, characterized in that: It comprises a battery casing, a battery cover and a battery cell as described in any one of claims 1 to 4, wherein the battery cell is arranged in the battery casing, and the battery cover is used to seal the battery casing.

6. The battery according to claim 5, characterized in that: The battery cover plate comprises an upper cover plate component and a lower cover plate component which are stacked, and the upper cover plate component and the lower cover plate component are insulated from each other.

7. The battery according to claim 6, characterized in that: A first through hole is provided on the lower cover component, and a positive terminal is provided on the upper cover component at a position corresponding to the first through hole. The positive terminal is connected to the upper cover component and extends in a direction perpendicular to the plane where the upper cover component is located, and the positive terminal is embedded in the first through hole.

8. The battery according to claim 7, 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.

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

10. The battery according to claim 9, characterized in that: The insulating tape is selected from one or more of polyvinyl chloride insulating tape, cross-linked polyethylene insulating tape, rubber insulating tape, acrylic insulating tape, foam insulating tape, and polyester insulating tape.

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