CN216720083U - Battery shell and battery - Google Patents
Battery shell and battery Download PDFInfo
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- CN216720083U CN216720083U CN202121771155.7U CN202121771155U CN216720083U CN 216720083 U CN216720083 U CN 216720083U CN 202121771155 U CN202121771155 U CN 202121771155U CN 216720083 U CN216720083 U CN 216720083U
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- battery
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- case
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Abstract
The application discloses a battery shell and a battery, and relates to the technical field of batteries, wherein the battery shell comprises an inner shell, an outer shell, at least one first through hole, at least one second through hole and a first insulator; the at least one first through hole is formed in the outer shell; at least one second through hole is arranged on the inner shell, and a first insulator is arranged between the outer shell and the inner shell and used for plugging the first through hole and the second through hole. Therefore, the battery shell can be integrally molded, and the manufacturing cost of the battery shell can be reduced; two sealing areas are formed by the inner shell, the outer shell and the insulator, so that the sealing performance of the battery is improved; adopt first through-hole, insulator and second through-hole to form explosion-proof pressure release structure, promoted the security of battery when using.
Description
Technical Field
The application relates to the field of batteries, in particular to a battery shell and a battery.
Background
With the development of science and technology, batteries are widely used in electronic devices such as electric toys, portable electric lights, and electronic readers. In battery technology, the safety of the battery during use is considered, as well as the manufacturing cost of the battery. Therefore, how to improve the safety of the battery during use while reducing the manufacturing cost of the battery is one of the technical problems that needs to be solved urgently in the battery technology.
SUMMERY OF THE UTILITY MODEL
An object of the present application is to provide a battery case and a battery, which can improve the safety of the battery when in use.
The embodiment of the application is realized as follows:
an embodiment of the present application provides a battery case including an inner case, an outer case, at least one first through hole, at least one second through hole, and a first insulator; the at least one first through hole is formed in the outer shell; at least one second through hole arranged on the inner shell; the first insulator is arranged between the outer shell and the inner shell and can seal the first through hole and the second through hole.
In one embodiment, the first through holes are uniformly distributed in the outer shell; the second through hole is provided with a plurality of uniformly distributed in the inner shell.
In an embodiment, the number of the first through holes is the same as that of the second through holes, and the first through holes correspond to the second through holes one to one.
In an embodiment, the battery case further includes a cover body, the cover body has a groove, and the cover body can be covered on the outer case body through the groove.
In an embodiment, the battery case further includes a second insulator connected to the first insulator and disposed between the cover and the inner case.
In an embodiment, the outer housing is a tubular structure, and the first insulator is disposed between an inner wall of the outer housing and an outer wall of the inner housing.
In an embodiment, the battery case further includes a cover body, the cover body has a groove, and the cover body can be covered on the inner case body through the groove.
In an embodiment, the inner housing is a tubular structure, the inner housing includes a first opening and a second opening, and the cover can be covered on the first opening through the groove.
In one embodiment, the battery case further includes a second insulator connected to the first insulator and disposed between the inner bottom surface of the outer case and the second opening; wherein, the first insulator is arranged between the inner side wall of the outer shell and the outer side wall of the inner shell.
The embodiment of the application provides a battery, which comprises a battery shell, an electrode group and electrolyte, wherein the electrode group comprises a first tab and a second tab; an electrolyte is disposed in the battery case.
Compared with the prior art, the beneficial effect of this application is:
this application adopts first through-hole, insulator and second through-hole to form explosion-proof pressure release structure, has promoted the security of battery when using.
This application adopts interior casing, shell body and insulator to form two sealing area, has promoted the sealing performance of battery.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a cross-sectional view of a battery case according to an embodiment of the present application.
Fig. 2 is a cross-sectional view of a battery according to an embodiment of the present application.
Fig. 3 is a cross-sectional view of a battery case according to an embodiment of the present application.
Fig. 4 is a cross-sectional view of a battery according to an embodiment of the present application.
Icon:
1-a battery case; 100-an inner housing; 110 — a first opening; 120-a second opening; 200-an outer shell; 300-a first via; 400-a second via; 510-a first insulator; 520-a second insulator; 600-a cover body; 610-groove.
2-a battery; 700-electrode group; 710-a first tab; 720-a second tab; 800-electrolyte.
Detailed Description
The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.
In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1, which is a cross-sectional view of a battery case according to an embodiment of the present application, the battery case 1 can be applied to a micro button type lithium ion battery, and the battery case 1 includes: the structure comprises an inner shell 100, an outer shell 200, a first through hole 300, a second through hole 400, a first insulator 510 and a cover body 600. Wherein, at least one first through hole 300 is arranged on the outer shell 200; at least one second through-hole 400 is provided on the inner case 100; the first insulator 510 is provided between the inner case 100 and the outer case 200 and can seal the first through-hole 300 and the second through-hole 400.
In this embodiment, four first through holes 300 are uniformly distributed on the sidewall of the outer housing 200; the second through holes 400 are four and are uniformly distributed on the sidewall of the inner case 100. The first through holes 300 and the second through holes 400 are the same in number and correspond to one another.
In this embodiment, the battery case 1 further includes: the cover 600 has a groove 610 on the cover 600, and the cover 600 can be closed to the opening of the outer case 200 through the groove 610.
In this embodiment, the battery case 1 further includes: and a second insulator 520, the second insulator 520 being connected to the first insulator 510, between the cover 600 and the inner case 100. In one embodiment, the second insulator 520 and the first insulator 510 may be integrally formed.
In a manufacturing process, the cover 600 presses the second insulator 520 into the outer housing 200 through the opening of the outer housing 200, and the inner housing 100 and the cover 600 compress the second insulator 520 to form a sealed region.
In this embodiment, the cover body 600, the second insulator 520 and the inner case 100 are combined to form a sealing region, thereby improving the reliability of sealing. In this embodiment, the outer casing 200 is a tubular structure, and the first insulator 510 is disposed between the inner wall of the outer casing 200 and the outer wall of the inner casing 100. The first insulator 510, the outer housing 200 and the inner housing 100 are combined, and the first insulator 510 is deformed, compressed or extrusion-sealed after being glued, so that another sealing area is formed, and the sealing reliability is improved. In this embodiment, the inner housing 100 and the outer housing 200 may be made of a metal material such as stainless steel, carbon steel, or aluminum alloy, and may be formed by a cold working method such as stamping, pressing, or folding, or may be formed by a powder metallurgy method. The first insulator 510 and the second insulator 520 may be made of materials with elasticity and chemical corrosion and aging resistance, such as soluble Polytetrafluoroethylene (PFA), polypropylene (PP), Polyethylene (PE), and may be made by extrusion, injection molding, and the like.
In another embodiment, after the inner housing 100 and the outer housing 200 are formed and assembled, the inner housing 100 and the outer housing 200 are placed into a mold for injection molding, thereby forming the first insulator 510.
In this embodiment, the cover body 600 may be made of a metal material such as stainless steel, carbon steel, or aluminum alloy, and may be formed by a cold working method such as stamping, pressing, or folding, or may be formed by a powder metallurgy method.
In a manufacturing process, the cover 600 may be fixed by glue or metal welding after being pressed into the outer case 200, so as to ensure the reliability thereof.
This application can select for use injection moulding manufacturing process through interior casing 100, shell body 200 integrated into one piece respectively, first insulator 510, combines interior casing 100 and shell body 200 for it is sealed that insulating and sealed integrated into one piece, second insulator 520 adopt the extrusion to compress, simplifies battery manufacturing process and reduces manufacturing cost.
Please refer to fig. 2, which is a cross-sectional view of a battery according to an embodiment of the present application. The battery 2 includes: a battery case 1, an electrode group 700, and an electrolyte 800.
In this embodiment, the electrode assembly 700 includes a first tab 710 and a second tab 720, the first tab 710 is fixed to the cover 600, and the second tab 720 is fixed to the inner housing 100; the electrolyte 800 is disposed in the inner case 100, wherein the first insulator 510 and the second insulator 520 are not provided with a vent hole, and the inside of the battery needs to be sealed under normal use conditions. At this time, the first through-hole 300 and the second through-hole 400 are sealed by the first insulator 510, thereby ensuring the airtightness of the inside of the battery 2.
The inner case 100 and the outer case 200 are respectively preformed, and the case insulation and sealing structure is integrated, thereby simplifying the manufacturing process and reducing the manufacturing cost.
Under normal use conditions, the first insulator 510 is disposed between the inner case 100 and the outer case 200, and blocks the exhaust passage between the inside and the outside of the battery case 1, forming an insulating and sealing structure.
When the pressure in the inner case 100 is too high (under abnormal use conditions), the first insulator 510 is crushed by the pressure inside the inner case 100, the inside of the battery case 1 is penetrated with the outside, and a plurality of exhaust paths are formed, so that the pressure in the inner case 100 is released, the pressure is lowered without causing explosion of the battery 2, and safety in use of the battery is ensured.
When the temperature of the electrolyte 800 is too high (under abnormal use conditions), the first insulator 510 is melted, the inside and the outside of the battery case 1 are communicated to form a plurality of exhaust paths, the electrolyte 800 inside the inner case 100 flows out, the pressure is reduced, and the combustion of the battery 2 is not caused, thereby ensuring the safety of the battery during use.
The anti-explosion pressure relief structure formed by the first through hole 300, the first insulator 510 and the second through hole 400 ensures the safety of a user in use, ensures the structural integrity under extreme conditions and improves the safety of the battery; the failure condition of the traditional pressure relief explosion-proof valve caused by too late exhaust under the extreme temperature condition is avoided. One sealing region formed by combining the cover body 600, the second insulator 520 and the inner housing 100 and the other sealing region formed by combining the first insulator 510, the outer housing 200 and the inner housing 100 effectively ensure the reliable and durable sealing performance of the battery.
Please refer to fig. 3, which is a cross-sectional view of a battery case according to an embodiment of the present application, and the battery case can be applied to a micro button type lithium ion battery. The battery case 1 includes: inner housing 100, outer housing 200, first through hole 300, second through 1400, first insulator 510, and cover 600. Wherein, at least one first through hole 300 is arranged on the outer shell 200; at least one second through-hole 400 is provided on the inner case 100; the first insulator 510 is provided between the inner case 100 and the outer case 200 and can seal the first through-hole 300 and the second through-hole 400.
In this embodiment, four first through holes 300 are uniformly distributed on the side wall of the outer housing 200; the second through holes 400 are four and are uniformly distributed on the sidewall of the inner case 100. The first through holes 300 and the second through holes 400 are the same in number and correspond to each other one by one.
In this embodiment, the battery case 1 further includes: the cover body 600 is provided with a groove 610 on the cover body 600, and the cover body 600 can cover the opening of the inner housing 100 through the groove 610.
In this embodiment, the inner housing 100 is a tubular structure, and the inner housing 100 includes a first opening 110 and a second opening 120; the cover 600 can cover the first opening 110 through the groove 610; the first insulator 510 is disposed between the outer case 200 and the inner case 100.
In a manufacturing process, after the cover 600 is covered on the first opening 110 of the inner housing 100, the cover can be fixed by glue or metal welding, so as to ensure the reliability of the fixing.
In this embodiment, the battery case 1 further includes: a second insulator 520, the second insulator 520 is connected to the first insulator 510, and in an embodiment, the second insulator 520 and the first insulator 510 may be integrally formed.
The second insulator 520 is connected to the first insulator 510 and disposed between the inner bottom surface of the outer case 200 and the second opening 120;
wherein the first insulator 510 is disposed between the inner sidewall of the outer case 200 and the outer sidewall of the inner case 100.
In this embodiment, the second opening 120, the second insulator 520 and the outer housing 200 are combined to form a sealing region; the inner case 100, the outer case 200 and the first insulator 510 are combined to form another sealing region, thereby improving the reliability of sealing.
In this embodiment, the inner housing 100 and the outer housing 200 may be made of a metal material such as stainless steel, carbon steel, or aluminum alloy, and may be formed by a cold working method such as stamping, pressing, or folding, or may be formed by a powder metallurgy method. The first insulator 510 may be made of materials with elasticity and resistance to chemical corrosion and aging, such as soluble Polytetrafluoroethylene (PFA), polypropylene (PP), Polyethylene (PE), etc., and may be made by methods such as extrusion and injection molding.
In another embodiment, the inner housing 100 and the outer housing 200 are assembled after being formed, and the inner housing 100 and the outer housing 200 are placed in a mold for injection molding, thereby forming the first insulator 510. In this embodiment, the cover body 600 may be made of a metal material such as stainless steel, carbon steel, or aluminum alloy, and may be formed by a cold working method such as stamping, pressing, or folding, or may be formed by a powder metallurgy method.
This application can be through interior casing 100, shell body 200 respectively integrated into one piece, the optional manufacturing process that moulds plastics of first insulator 510, combines interior casing 100 and shell body 200 for insulating and sealed integrated into one piece simplify battery manufacturing process and reduce manufacturing cost.
Please refer to fig. 4, which is a cross-sectional view of a battery according to an embodiment of the present application. The battery 2 includes: a battery case 1, an electrode group 700, and an electrolyte 800.
In this embodiment, the electrode assembly 700 includes a first tab 710 and a second tab 720, the first tab 710 is fixed to the cover 600, and the second tab 720 is fixed to the inner housing 100; electrolyte 800 is placed inside inner case 100.
The first insulator 510 is not provided with an air vent, and the tightness of the inside of the battery needs to be ensured under normal use conditions. At this time, the first through-hole 300 and the second through-hole 400 are sealed by the first insulator 510, thereby ensuring the airtightness of the inside of the battery 2.
The inner case 100 and the outer case 200 are respectively preformed, and the case insulation and sealing structure is integrated, thereby simplifying the manufacturing process and reducing the manufacturing cost.
The anti-explosion pressure relief structure formed by the first through hole 300, the first insulator 510 and the second through hole 400 ensures the safety of a user in use, ensures the structural integrity under extreme conditions and improves the safety of the battery; the failure condition of the traditional pressure relief explosion-proof valve caused by too late exhaust under the extreme temperature condition is avoided. One sealing region formed by combining the outer case 200, the second insulator 520 and the inner case 100 and the other sealing region formed by combining the first insulator 510, the outer case 200 and the inner case 100 effectively ensure reliable and durable sealing performance of the battery 2.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A battery case, comprising:
an inner housing;
an outer housing;
the at least one first through hole is formed in the outer shell;
at least one second through hole provided in the inner case, an
The first insulator is arranged between the outer shell and the inner shell and can seal the first through hole and the second through hole.
2. The battery casing of claim 1, wherein the first through hole is provided in plurality and uniformly distributed in the outer casing; the second through hole is provided with a plurality of uniformly distributed in the inner shell.
3. The battery case according to claim 2, wherein the number of the first through holes is the same as the number of the second through holes, and the first through holes correspond to the second through holes one to one.
4. The battery case according to any one of claims 1 to 3, further comprising:
the cover body is provided with a groove, and the cover body can be covered on the outer shell body through the groove.
5. The battery housing of claim 4, further comprising:
and the second insulator is connected with the first insulator and is arranged between the cover body and the inner shell.
6. The battery case according to claim 5, wherein the outer case is a tubular structure, and the first insulator is provided between an inner wall of the outer case and an outer wall of the inner case.
7. The battery case according to any one of claims 1 to 3, further comprising:
the cover body is provided with a groove, and the cover body can be covered on the inner shell body through the groove.
8. The battery casing as recited in claim 7, wherein the inner casing is a tubular structure, the inner casing includes a first opening and a second opening, and the cover can be covered on the first opening through the groove.
9. The battery housing of claim 8, further comprising:
a second insulator connected to the first insulator and disposed between the second opening and the inner bottom surface of the outer housing;
wherein, the first insulator is arranged between the inner side wall of the outer shell and the outer side wall of the inner shell.
10. A battery, comprising:
the battery case of claim 6 or 9;
the electrode group comprises a first electrode lug and a second electrode lug, the first electrode lug is connected with the cover body, and the second electrode lug is connected with the battery shell; and
and the electrolyte is arranged in the battery shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121771155.7U CN216720083U (en) | 2021-07-30 | 2021-07-30 | Battery shell and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121771155.7U CN216720083U (en) | 2021-07-30 | 2021-07-30 | Battery shell and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216720083U true CN216720083U (en) | 2022-06-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121771155.7U Active CN216720083U (en) | 2021-07-30 | 2021-07-30 | Battery shell and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216720083U (en) |
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2021
- 2021-07-30 CN CN202121771155.7U patent/CN216720083U/en active Active
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