CN216818479U - Battery shell, battery and electronic equipment - Google Patents
Battery shell, battery and electronic equipment Download PDFInfo
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- CN216818479U CN216818479U CN202123160858.9U CN202123160858U CN216818479U CN 216818479 U CN216818479 U CN 216818479U CN 202123160858 U CN202123160858 U CN 202123160858U CN 216818479 U CN216818479 U CN 216818479U
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- battery
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Abstract
The application discloses battery case, battery and electronic equipment. The battery shell comprises a shell body and a cover plate assembly; a step part is formed on the inner surface of the shell body, and a flanging part is formed on the shell body above the step part; the cover plate assembly comprises a cover plate and a sealing part wrapping the cover plate in the circumferential direction of the cover plate; the cover plate assembly is arranged on the step portion and located inside the shell body, the shell body is isolated from the cover plate through the sealing portion, and the flanging portion is buckled on the cover plate assembly.
Description
Technical Field
The present application relates to the field of batteries, and more particularly, to a battery case, a battery, and an electronic device.
Background
The sealing process of the lithium ion button cell on the market at present mainly comprises the traditional sealing process and the laser welding sealing process.
When the lithium ion button battery shell comprises an upper steel shell, a lower steel shell and an insulating rubber ring, the traditional sealing process is adopted for sealing. In the traditional sealing process, the upper layer steel shell and the lower layer steel shell are sealed through the insulating rubber rings, so that the space of the inner cavity of the battery is small, the energy density is low, and the current market demand is difficult to meet.
When the lithium ion button battery comprises a steel shell and a cap component, a laser welding sealing process is adopted for sealing. The process cell has high requirement on laser welding precision, the process rejection rate is high, the battery shell is sealed by laser welding, and the risk of battery leakage is high.
SUMMERY OF THE UTILITY MODEL
An object of the present application is to provide a battery case, a battery, and a new technical solution of an electronic device.
According to a first aspect of embodiments herein, a battery case is provided. The battery case includes: a housing body and a cover plate assembly;
a step part is formed on the inner surface of the shell body, and a flanging part is formed on the shell body above the step part;
the cover plate assembly comprises a cover plate and a sealing part wrapping the cover plate in the circumferential direction of the cover plate;
the cover plate assembly is arranged on the step portion and located inside the shell body, the shell body is isolated from the cover plate through the sealing portion, and the flanging portion is buckled on the cover plate assembly.
Optionally, a circle of the step portion is formed on the inner surface of the case body in a circumferential direction of the inner surface of the case body.
Optionally, the step portion divides the case body into a first body and a second body; along the height direction of the shell body, the first body has a first height dimension, the second body has a second height dimension, and the ratio range of the second height dimension/the first height dimension is 1: 10-1: 15.
Optionally, the battery case further comprises a structural adhesive; the cover plate assembly is arranged on the step portion, and the structural adhesive is filled between the sealing portion and the shell body.
Optionally, the seal comprises an upper seal and a lower seal; the upper sealing part and the lower sealing part are connected to form an accommodating space, and the edge area of the cover plate is arranged in the accommodating space.
Optionally, the sidewall of the first body has a first thickness dimension; the sidewall of the second body has a second thickness dimension, and the first thickness dimension is greater than the second thickness dimension.
Optionally, the housing body and the cover plate are both metal parts.
Alternatively, the sealing portion is a rubber member.
According to a second aspect of embodiments of the present application, there is provided a battery. The battery includes the battery case according to the first aspect.
Optionally, the battery further comprises a battery cell; the battery core is placed in the battery shell; the battery cell comprises a first tab and a second tab, the first tab is electrically connected with the shell body, and the second tab is electrically connected with the cover plate assembly.
According to a third aspect of embodiments of the present application, there is provided an electronic device. The battery of the second aspect of the electronic device.
One technical effect of the present application is that a battery case is provided. The battery case includes a case body and a cap plate assembly. The cover plate assembly is arranged in the shell body through a step part formed in the shell body, and the shell body is buckled and pressed through a flanging part formed on the shell body to seal the battery shell. In this embodiment, the sealing manner for the battery case is different from the conventional sealing process and the laser welding sealing process. For traditional sealing process, this embodiment can not influence the inner chamber space in the battery shell through the combination of shell body and apron subassembly, helps promoting battery energy density. For laser welding sealing process, this embodiment avoids adopting laser welding to realize sealing to battery case, and sealing process is simple, has reduced battery case's defective rate.
Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a first exploded view of a battery case (internal cell) structure according to an embodiment of the present invention.
Fig. 2 is a first schematic structural diagram of a battery case (internal battery cell) in the embodiment of the present application.
Fig. 3 is a structural exploded view of a battery case (internal battery cell) in the embodiment of the present application.
Fig. 4 is a second schematic structural diagram of a battery case (internal battery cell) in the embodiment of the present application.
Description of reference numerals:
1. a housing body; 10. a step portion; 11. a first body; 12. a second body; 121. flanging part;
2. a cover plate assembly; 21. a cover plate; 22. a sealing part; 221. an upper sealing part; 222. a lower sealing part;
3. an electric core; 31. a first tab; 32. and a second tab.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to a first aspect of embodiments of the present application, a battery case is provided. Referring to fig. 1 to 4, the battery case includes: a housing body 1 and a cover assembly 2.
A step portion 10 is formed on the inner surface of the housing body 1, and a flange portion 121 is formed on the housing body 1 above the step portion 10.
The cap assembly 2 includes a cap 21 and a sealing portion 22 wrapping the cap 21 in a circumferential direction of the cap 21.
The cover plate assembly 2 is disposed on the step portion 10 and located inside the housing body 1, the housing body 1 and the cover plate 21 are isolated by the sealing portion 22, and the flanging portion 121 is buckled and pressed on the cover plate assembly 2.
Specifically, a stepped portion 10 is formed on the inner surface of the case body 1. The case body 1 is formed in an integral molding manner such that a step portion 10 is formed on an inner surface of the case body 1. The case body 1 may be formed by, for example, punching or the like. In one embodiment, a plurality of steps 10 are formed on the inner surface of the case body 1, the plurality of steps 10 being arranged at intervals along the circumferential direction of the inner surface; or in yet another embodiment, a ring of steps 10 is formed on the inner surface of the housing body 1. Wherein the step 10 functions to support the cover assembly 2.
The cover assembly 2 is disposed inside the case body 1 through the step 10. For example, the cover plate 21 is first put on the sealing portion 22, and then the cover plate assembly 2 is placed horizontally in the case body 1, so that the cover plate 21 is isolated (separated and insulated) from the case body 1 by the sealing portion 22, and the step portion 10 on the inner surface of the case body 1 is used as a support, so that the cover plate assembly 2 is disposed inside the case body 1. When the cover plate assembly 2 is disposed inside the case body 1, the sealing portion 22 can insulate the case body 1 and the cover plate 21, and can insulate the step portion 10 and the cover plate 21, thereby preventing the battery from being shorted due to direct contact between the case body 1 and the cover plate 21 and direct contact between the step portion 10 and the cover plate 21.
When the cover plate assembly 2 is arranged inside the shell body 1 through the step part 10, the cover plate assembly 2 is buckled and pressed on the cover plate assembly 2 through the flanging part 121 formed on the shell body 1, and the sealing of the cover plate assembly 2 is realized. Specifically, the cover plate 21 is sleeved with the sealing part 22, then the cover plate assembly 2 is flatly placed in the shell body 1, the step part 10 formed on the inner surface of the shell body 1 is used as a support, at this time, the sealing part 22 insulates the shell body 1 and the cover plate 21, and the insulating step part 10 and the cover plate 21, then the sealing mold is used for operating the edge part of the shell body 1, so that the edge part of the shell body 1 is deformed to form the flanging part 121, and the flanging part 121 is buckled on the cover plate assembly 2 to seal the battery shell. Specifically, the flanging part 121 is buckled and pressed on the sealing part 22, and the length of the flanging part 121 along the length direction of the battery case is smaller than or equal to the length of the sealing part 22 along the length direction of the battery case, that is, the flanging part 121 cannot exceed the sealing part 22, so that the phenomenon of battery short circuit caused by the contact of the flanging part 121 and the cover plate 21 is avoided.
In this embodiment, the battery case includes a case body 1 and a cap plate assembly 2. The cover member 2 is disposed in the case body 1 through a step portion 10 formed in the case body 1, and the case body 1 is crimped by a burring portion 121 formed on the case body 1. In this embodiment, the sealing manner for the battery case is different from the conventional sealing process and the laser welding sealing process. For traditional sealing process, this embodiment can not influence the inner chamber space in the battery casing through the combination of casing body 1 and apron subassembly 2, helps promoting battery energy density. For laser welding sealing process, this embodiment avoids adopting laser welding to realize sealing to battery case, and sealing process is simple, has reduced battery case's defective rate.
In one embodiment, the battery case is applied to a battery, and when the air pressure inside the battery reaches a certain pressure, the sealing position (i.e. the position where the flanging part 121 buckles the cover plate assembly 2) can be opened, so as to achieve the pressure relief protection effect.
In one embodiment, referring to fig. 1 and 3, a circle of the step 10 is formed on the inner surface of the housing body 1 in a circumferential direction of the inner surface of the housing body 1.
In this embodiment, the step 10 is formed in one turn on the inner surface of the case body 1, that is, the step 10 is formed in one turn in the circumferential direction of the inner side wall of the case body 1. When the cover assembly 2 is disposed inside the case body 1 through the step portion 10, the supporting strength of the step portion 10 to the cover assembly 2 is improved.
In one embodiment, referring to fig. 2 and 4, the step 10 divides the housing body 1 into a first body 11 and a second body 12. Along the height direction of the shell body 1, the first body 11 has a first height dimension, the second body 12 has a second height dimension, and the range of the second height dimension/the first height dimension is 1: 10-1: 15.
In this embodiment, the step 10 divides the housing body 1 into a first body 11 and a second body 12, i.e., the step 10 is formed inside the housing of the housing body 1, not at the housing mouth of the housing body 1. The step 10 is located at the case opening of the case body 1, so that the case body 1 is not divided into the first body 11 and the second body 12.
In this embodiment, the thickness of the cover plate assembly 2 is smaller than the second height dimension of the second body 12, and when the cover plate assembly 2 is located inside the case body 1 through the step portion 10, the flange portion 121 is easily formed at the edge portion of the case body 1 (i.e., the second body 12), and the cover plate assembly 2 is buckled through the flange portion 121, so as to seal the battery case.
In this embodiment, the first body 11 has a first height dimension, the second body 12 has a second height dimension, and a ratio of the second height dimension/the first height dimension ranges from 1:10 to 1: 15. The present embodiment defines a ratio range between the second height dimension and the first height dimension, and in use, the cell 3 is located in the first body 11, and the cell 3 is prevented from contacting the inner surface of the cover plate assembly 2.
In one embodiment, the battery case further comprises a structural adhesive; the cover plate assembly 2 is arranged on the step part 10, and the structural adhesive is filled between the sealing part 22 and the shell body 1.
In this embodiment, the cover plate 21 is sleeved with the sealing portion 22 (i.e. the sealing portion 22 wraps the circumferential edge of the cover plate 21), the structural adhesive is coated on the outer wall of the sealing portion 22, and then the cover plate assembly 2 is disposed inside the shell body 1 through the step portion 10, at this time, the structural adhesive is tightly bonded to the inner surface of the shell body 1. Or the cover plate 21 is sleeved with the sealing part 22 (namely, the sealing part 22 wraps the circumferential edge of the cover plate 21), the structural adhesive is coated on the part of the inner surface of the shell body 1, then the cover plate assembly 2 is arranged inside the shell body 1 through the step part 10, and at the moment, the structural adhesive is tightly combined with the inner surface of the shell body 1.
In this embodiment, the sealing property between the cover plate assembly 2 and the case body 1 is improved by the structural adhesive filled between the sealing portion 22 and the inner surface of the case body 1.
In one embodiment, the sealing portion 22 includes an upper sealing portion 221 and a lower sealing portion 222; the upper sealing part 221 and the lower sealing part 222 are connected to form an accommodating space, and an edge region of the cover plate 21 is disposed in the accommodating space.
In this embodiment, the sealing part 22 includes an upper sealing part 221 and a lower sealing part 222 connected to the upper sealing part 221. For example, the upper sealing part 221 and the lower sealing part 222 are integrally molded.
In this embodiment, the upper sealing part 221 insulates the burring part 121 from the cover plate 21, avoiding direct contact between the burring part 121 and the cover plate 21; the lower sealing part 222 insulates the step part 10 from the cap plate 21, and prevents direct contact between the step part 10 and the cap plate 21; the junction between the lower sealing portion 222 and the upper sealing portion 221 insulates the inner surface of the case body 1 from the cap plate 21, avoiding direct contact between the inner surface of the case body 1 and the cap plate 21.
In this embodiment, the upper sealing portion 221 and the lower sealing portion 222 are connected to form an accommodating space, and an edge region of the cover 21 is disposed in the accommodating space, so that the sealing portion 22 wraps a part of the cover 21. When the cover assembly 2 is located inside the case body 1 by the step 10, insulation between the case body 1 and the cover 21 is achieved.
In one embodiment, referring to fig. 2, the sidewall of the first body 11 has a first thickness dimension; the sidewall of the second body 12 has a second thickness dimension, the first thickness dimension being greater than the second thickness dimension.
In this embodiment, the interior of the housing body 1 is partially recessed, so that a step 10 carrying the cover plate assembly 2 is formed in the interior of the housing body 1. Specifically, the side wall of the first body 11 has a first thickness dimension; the side wall of the second body 12 has a second thickness dimension, and the first thickness dimension is greater than the second thickness dimension, so that the inner surface of the first body 11 is recessed relative to the inner surface of the second body 12, and then a step portion 10 is formed at the joint of the first body 11 and the second body 12, so that the cover plate assembly 2 is located inside the housing body 1 through the step portion 10.
In one embodiment, the housing body 1 and the cover plate 21 are both metal components.
In this embodiment, the housing body 1 and the cover plate 21 are made of metal. For example, the shell body 1 is a steel shell, and the cover plate 21 is a steel plate, so that the production cost of the battery shell is reduced, and the use requirement of the battery performance is met.
In one embodiment, the sealing portion 22 is a rubber component.
In this embodiment, the sealing portion 22 is made of rubber, and satisfies the insulation performance between the cover plate 21 and the case body 1.
According to a second aspect of embodiments herein, a battery is provided. The battery includes the battery case according to the first aspect.
In this embodiment, the battery case is applied to a battery, improving the energy density of the battery. For example, the energy density of the battery provided by the embodiment of the application is improved by 10-15% compared with that of the conventional battery. The battery shell provided by the embodiment can meet the requirement that the height of the battery cell 3 is lower than 4.2mm, and can also realize mass production. For example, the battery is a button battery.
In one embodiment, as shown with reference to fig. 2 and 4, the battery further includes a battery cell 3; the battery core 3 is placed in the battery shell; the battery cell 3 comprises a first tab 31 and a second tab 32, the first tab 31 is electrically connected with the shell body 1, and the second tab 32 is electrically connected with the cover plate assembly 2.
In this embodiment, the battery cell 3 is placed in the case body 1, the first tab 31 is connected and conducted with the case body 1 by using laser welding or resistance double-needle welding, and the second tab 32 is welded with the cover plate 21 by using laser welding or resistance welding.
According to a third aspect of embodiments of the present application, there is provided an electronic device. An electronic device includes the battery according to the second aspect. For example, an electronic apparatus includes an apparatus main body, and a battery that supplies power to the electronic apparatus is provided inside the apparatus main body to be electrically connected to the electronic apparatus. For example, the electronic device may be a headset, a watch, etc.
In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.
Although some specific embodiments of the present application have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (10)
1. A battery case, characterized in that the battery case comprises a case body (1) and a cover plate assembly (2);
a step part (10) is formed on the inner surface of the shell body (1), and a flanging part (121) is formed on the shell body (1) above the step part (10);
the cover plate assembly (2) comprises a cover plate (21) and a sealing part (22) wrapping the cover plate (21) in the circumferential direction of the cover plate (21);
the cover plate assembly (2) is arranged on the step portion (10) and located inside the shell body (1), the shell body (1) and the cover plate (21) are isolated through the sealing portion (22), and the flanging portion (121) is buckled and pressed on the cover plate assembly (2).
2. The battery case according to claim 1, wherein a circle of the step portion (10) is formed on the inner surface of the case body (1) in a circumferential direction of the inner surface of the case body (1).
3. The battery case according to claim 1, wherein the step (10) divides the case body (1) into a first body (11) and a second body (12);
along the height direction of the shell body (1), the first body (11) has a first height dimension, the second body (12) has a second height dimension, and the ratio of the second height dimension to the first height dimension ranges from 1:10 to 1: 15.
4. The battery housing of claim 1, further comprising a structural adhesive;
the cover plate assembly (2) is arranged on the step part (10), and the structural adhesive is filled between the sealing part (22) and the shell body (1).
5. The battery case according to claim 1, wherein the sealing part (22) comprises an upper sealing part (221) and a lower sealing part (222);
the upper sealing part (221) and the lower sealing part (222) are connected to form an accommodating space, and the edge area of the cover plate (21) is arranged in the accommodating space.
6. A battery case according to claim 3, characterized in that the side wall of the first body (11) has a first thickness dimension; the side wall of the second body (12) has a second thickness dimension, the first thickness dimension being greater than the second thickness dimension.
7. The battery case according to claim 1, wherein the case body (1) and the cap plate (21) are both metal members.
8. A battery comprising a battery housing according to any one of claims 1 to 7.
9. The battery according to claim 8, characterized in that the battery further comprises a cell (3); the battery core (3) is placed in the battery shell;
the battery cell (3) comprises a first tab (31) and a second tab (32), the first tab (31) is electrically connected with the shell body (1), and the second tab (32) is electrically connected with the cover plate assembly (2).
10. An electronic device, characterized in that the electronic device comprises a battery according to any of claims 8-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123160858.9U CN216818479U (en) | 2021-12-15 | 2021-12-15 | Battery shell, battery and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123160858.9U CN216818479U (en) | 2021-12-15 | 2021-12-15 | Battery shell, battery and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216818479U true CN216818479U (en) | 2022-06-24 |
Family
ID=82054964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123160858.9U Active CN216818479U (en) | 2021-12-15 | 2021-12-15 | Battery shell, battery and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216818479U (en) |
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2021
- 2021-12-15 CN CN202123160858.9U patent/CN216818479U/en active Active
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