CN214099724U

CN214099724U - Battery cell and electronic equipment

Info

Publication number: CN214099724U
Application number: CN202023339629.9U
Authority: CN
Inventors: 童焰; 陈志勇
Original assignee: Guangdong Mic Power New Energy Co Ltd
Current assignee: Guangdong Mic Power New Energy Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-08-31
Anticipated expiration: 2030-12-30

Abstract

The present disclosure relates to a battery cell and an electronic device. The battery cell includes: the battery comprises an inner shell, an outer shell and a sealing part arranged between the inner shell and the outer shell, wherein the inner shell comprises a first annular column and a folding part arranged at the end part of the first annular column, a battery cell is arranged on the periphery of the first annular column, and the battery cell is electrically connected with the outer shell and the inner shell; the sealing part includes annular portion and sets up the inboard chamber that holds of annular portion, part folding portion sets up hold the intracavity, so that the sealing part cladding folding portion, the shell cover is established the inner shell outside, the inside wall of shell with the lateral wall butt of sealing part.

Description

Battery cell and electronic equipment

Technical Field

The present disclosure relates to the field of battery technologies, and more particularly, to a battery cell and an electronic device.

Background

Button cells generally have a cylindrical housing with a height equal to or less than its diameter. In a circular cell, the housing is also configured in a cylindrical shape, but the height of the housing exceeds its diameter. The cylindrical housings of round and button cells usually consist of two solid, usually metallic, housing parts, between which an electrically insulating seal is arranged.

However, the existing lithium ion batteries are square and cylindrical, and are difficult to meet the requirements of some special-shaped electronic products, the special-shaped electronic products not only require that the lithium ion batteries have special-shaped structures, but also require that the lithium ion batteries can ensure the capacity and the use safety of the lithium ion batteries, and the lithium ion batteries with the traditional structures can not meet the market requirements.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide a battery cell and an electronic apparatus.

According to a first aspect of the present disclosure, there is provided a battery cell comprising:

an inner casing, an outer casing, and a sealing portion provided between the inner casing and the outer casing;

the inner shell comprises a first annular column and a folding part arranged at the end part of the first annular column, a battery cell is arranged on the periphery of the first annular column, and the battery cell is electrically connected with the outer shell and the inner shell;

the sealing part comprises an annular part and an accommodating cavity arranged on the inner side of the annular part, and part of the folding part is arranged in the accommodating cavity so that the sealing part covers the folding part;

the outer shell is sleeved on the outer side of the inner shell, and the inner side wall of the outer shell is abutted to the outer side wall of the sealing portion.

Optionally, the first annular pillar is configured as a central pillar, and the battery cell is wound around the periphery of the first annular pillar by taking the central pillar as an axis.

Optionally, the housing is an annular cylindrical structure.

Optionally, the first annular column includes two opposite ends, the folded portion includes a first folded portion and a second folded portion, the first folded portion is disposed on one end, and the second folded portion is disposed on the other end.

Optionally, the folded portion includes a first connecting portion engaged with the first annular pillar, and a second connecting portion engaged with the sealing portion, and the first connecting portion and the second connecting portion are connected by a third connecting portion.

Optionally, the axial dimension of the inner shell is smaller than the axial dimension of the outer shell.

Optionally, the first annular column of the inner shell, and/or the outer shell is provided with an explosion-proof portion.

Optionally, the axis of the cell is collinear with the axis of the inner housing, and/or the axis of the cell is collinear with the axis of the outer housing.

Optionally, the inner shell has a wall thickness in the range of: 0.05 mm-0.15 mm, and the wall thickness of the shell ranges from 0.05 mm-0.15 mm.

According to a second aspect of the present disclosure, an electronic device is provided. The electronic equipment comprises an equipment main body and the battery cell of the first aspect, wherein the battery cell is arranged on the equipment main body and is electrically connected with the equipment main body.

The technical effect of this disclosure lies in, battery monomer includes inner shell, shell and the sealing of setting between inner shell and shell, and the inner shell includes first annular post and turns over a portion, sealing cladding part turn over a portion, and the overcoat is established in the sealing and the inner shell outside, and battery monomer wholly is the loop configuration, satisfies the demand of different occasions.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of a battery cell according to the present disclosure.

Fig. 2 is a structural sectional view of a battery cell according to the present disclosure.

Fig. 3 is an exploded view of the battery cell according to the present disclosure.

Detailed Description

Various exemplary embodiments of the present disclosure 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 disclosure 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 disclosure, 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 an embodiment of the present disclosure, a battery cell is provided. Referring to fig. 1 to 3, the battery cell includes: an inner casing 1, an outer casing 2, and a seal portion 3 provided between the inner casing 1 and the outer casing 2.

The inner shell 1 comprises a first annular column 11 and a folding part 12 arranged at the end part of the first annular column 11, wherein a battery cell is wound on the first annular column 11, and the battery cell is electrically connected with the outer shell 2 and the inner shell 1.

The sealing part 3 comprises an annular part 31 and an accommodating cavity 311 arranged on the inner side of the annular part 31, and part of the folded part 12 is arranged in the accommodating cavity 311, so that the sealing part 3 covers the folded part 12.

The outer shell 2 is sleeved on the outer side of the inner shell 1, and the inner side wall 211 of the outer shell 2 is abutted to the outer side wall of the sealing part 3.

Specifically, a sealing part 3 is arranged between the inner shell 1 and the outer shell 2, wherein the sealing part 3 plays a role in sealing and insulating; the sealing portion 3 has elasticity, and the sealing portion 3 can be made of rubber, plastic or the like, preferably, the sealing portion 3 is made of PEEK.

Referring to fig. 2 and 3, the battery cell 4 is disposed on the outer periphery of the first annular column 11. In the prior art, a winding core is manufactured and then placed in a shell, and when the winding core is placed in the shell, a part of space is reserved at the hollow part of a central shaft of the winding core so as to be assembled in the shell; in this example, the battery cell 4 is directly disposed on the first annular column 11, so that the space inside the casing can be further saved, and the electric capacity of the battery cell can be increased.

The inner shell 1 comprises a first annular column 11 and a folded part 12 fixedly arranged on the first annular column 11, wherein the folded part 12 is folded towards an axis far away from the first annular column 11, for example, the first annular column 11 and the folded part 12 are integrally formed.

The sealing part 3 comprises an annular part 31 and an accommodating cavity 311 formed in the annular part 31, wherein the size and the structure of the accommodating cavity 311 are adapted to the structure of the folded part 12, for example, a part of the folded part 12 is embedded in the accommodating cavity 311 and can be in interference fit with the sealing part 3. In the process of assembling the battery monomer, the sealing part 3 is arranged on the folding part 12, and the outer shell 2 is sleeved outside the sealing part 3 and the inner shell 1, wherein the sealing part 3 is used for extruding the folding part 12 of the inner shell, and the outer shell 2 extrudes the outer side part of the sealing part 3, so that the battery monomer is sealed.

In this example, the sealing portion 3 is provided between the end of the inner case 1 and the end of the outer case 2, and the overall sealing performance with respect to the battery cell is improved. In the embodiment of the disclosure, the battery monomer is in an annular structure, so that various requirements of different occasions are met; the battery cell of the embodiment is directly arranged on the surface of the first annular column, and according to the structure of the battery monomer, the internal space of the battery monomer is fully utilized, and the battery capacity is improved.

Alternatively, referring to fig. 2 and 3, the first annular pillar 11 is configured as a central pillar, and the battery cell 4 is wound around the outer circumference of the first annular pillar 11 by taking the central pillar as an axis.

For example, the inner case 1 includes a first annular column 11, and folded

portions

12a and 12b provided at both end portions of the first annular column 11. Wherein the first annular column 11, the flap 12a and the flap 12b are integrally formed. When the first annular column 11, the folded part 12a and the folded part 12b are integrally formed, the first annular column 11 of the inner shell 1 is used as a central column, one end of the positive plate, the diaphragm and the negative plate is fixed on the first annular column 11, and the positive plate, the diaphragm and the negative plate are wound on the first annular column 11 by using the first annular column 11 as a shaft core to form the battery cell 4. Namely, the battery cell 4 is directly wound on the first annular column 11 by taking the first annular column 11 as an axis core.

Or the inner shell 1 comprises a first annular column 11, and a folded part 12a and a folded part 12b which are arranged at two ends of the first annular column 11, wherein at least one of the folded part 12a and the folded part 12b is detachably connected with the first annular column 11. When at least one of the folded part 12a and the folded part 12b is detached from the first annular column 11, after the battery core 4 is wound, the wound battery core 4 is sleeved on the first annular column 11, so that the battery core 4 is arranged on the first annular column 11 by taking the first annular column 11 as an axis, and finally, the folded part 12a and/or the folded part 12b is arranged on the first annular column 11.

In this example, the battery cell 4 is directly wound around the first annular pillar 11 with the first annular pillar 11 as a central pillar or directly sleeved on the periphery of the first annular pillar 11, so that the space inside the casing is saved, and the capacitance of the battery cell is increased.

Alternatively, referring to fig. 1 to 3, the housing 1 has an annular cylindrical structure.

For example, the outer case 2 is provided with a second annular column 21, the second annular column 21 is in a straight cylinder shape, the second annular column 21 is sleeved outside the inner case 1 and the sealing part 3, and the inner side wall 211 of the second annular column 21 is abutted against the outer side wall of the sealing part 3, so that the sealing performance of the battery cell is improved.

Alternatively, as shown in fig. 1 to 3, the first annular pillar 11 includes two opposite ends, and the folded part 12 includes a first folded part 12a and a second folded part 12b, the first folded part 12a is provided at one end, and the second folded part 12b is provided at the other end.

Referring to fig. 1-3, the first annular pillar 11 includes two opposite end portions, specifically, an upper end portion and a lower end portion, the upper end portion is provided with a first folded portion 12a, the lower end portion is provided with a second folded portion 12b, the two corresponding sealing portions are included, the two sealing portions 3 include a sealing portion 3a and a sealing portion 3b, wherein the sealing portion 3a covers the first folded portion 12a, the sealing portion 3b covers the second folded portion 12b, an inner sidewall of the upper end portion of the housing 2 abuts against an outer sidewall of the sealing portion 3a, an inner sidewall of the lower end portion of the housing 2 abuts against an outer sidewall of the sealing portion 3b, and the sealing performance of the whole battery cell is improved.

Alternatively, as shown in fig. 2 to 3, the folded part 12 includes a first connecting part 121 engaged with the first annular pillar 11, and a second connecting part 122 engaged with the sealing part 3, and the first connecting part 121 and the second connecting part 122 are connected by a third connecting part 123.

Referring to fig. 2 to 3, the folded portion 12 includes a first connecting portion 121, a second connecting portion 122 and a third connecting portion 123, the first connecting portion 121 is sleeved on an end portion of the first annular column 11, the second connecting portion 122 is embedded in the accommodating cavity 311 of the sealing portion 3, and the second connecting portion 122 can be in interference fit with the accommodating cavity 311 of the sealing portion 3, so as to improve the reliability of connection.

The first connection portion 121 and the second connection portion 122 are connected by the third connection portion 123, the sealing portion 3 is disposed on the second connection portion 122, and due to the structural design of the folded portion 12, the folded portion 12 and the housing 2 can both provide a pressing force to the sealing portion 3, so that the overall sealing performance of the battery cell is improved.

Alternatively, the third connecting portion 123 may have a horizontal plane structure or an inclined plane or an inclined arc surface.

Alternatively, as shown with reference to fig. 2, the axial dimension of the inner housing 1 is smaller than the axial dimension of the outer housing 2. For example, in the vertical direction of the battery cell, the axial dimension of the inner housing 1 is smaller than that of the outer housing 2, so that the sealing part 3 is conveniently arranged between the inner housing 1 and the outer housing 2; sealing 3 sets up on the folded part 12 of inner shell 1, and in the free vertical direction of battery, the upper surface of sealing 3 and the up end parallel and level setting of shell 2 improve the free outward appearance uniformity of battery.

Optionally, the first annular column 11 of the inner shell 1, and/or the outer shell 2 is provided with an explosion-proof portion. For example, the explosion-proof part can be arranged as an explosion-proof wire, and the safety and the usability of the battery cell are improved in the present example.

Alternatively, referring to fig. 1 to 3, the axis of the battery cell 4 is collinear with the axis of the inner casing 1, and/or the axis of the battery cell 4 is collinear with the axis of the outer casing 2. In this example, the first pole piece, the insulating diaphragm and the second pole piece are wound around the first annular column 11, and the first annular column 11 is located at the axis of the battery cell 4. In the prior art, the positive plate, the diaphragm and the negative plate are formed in a winding mode, the space in the battery cell is not fully utilized after the winding needle is drawn, and compared with the prior art, the energy density of the battery cell structure can be improved in the embodiment.

Optionally, referring to fig. 3, the battery cell 4 includes a winding core body, a first tab 41a and a second tab 41b, where the first tab 41a is disposed on an inner side wall of the winding core body and electrically connected to the inner casing 1, and the second tab 41b is disposed on an outer side wall of the winding core body and electrically connected to the outer casing 2.

Optionally, the inner shell has a wall thickness in the range of: 0.05 mm-0.15 mm, and the wall thickness of the shell ranges from 0.05 mm-0.15 mm. The present example improves the safety of the battery.

According to an embodiment of the present disclosure, there is provided an electronic apparatus including an apparatus main body and the battery cell of the first aspect, the battery cell being provided on the apparatus main body and electrically connected to the apparatus main body. The battery monomer of the embodiment is in a ring-shaped structure, and the battery monomer is applied to electronic equipment, so that different requirements of users are met. For example, the electronic device may be a camera, a headset, a watch, etc.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. 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 disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A battery cell, comprising:

the outer shell is sleeved outside the inner shell, and the inner side wall of the outer shell is abutted to the outer side wall of the sealing part.

2. The battery cell as claimed in claim 1, wherein the first annular pillar is configured as a center pillar, and the electric core is wound around the outer circumference of the first annular pillar with the center pillar as a core.

3. The battery cell of claim 1, wherein the housing is an annular cylindrical structure.

4. The battery cell as recited in claim 1 wherein the first annular post comprises two oppositely disposed ends and the fold comprises a first fold and a second fold, the first fold being disposed on one end and the second fold being disposed on the other end.

5. The battery cell according to any one of claims 1 to 4, wherein the folded portion includes a first connecting portion engaged with the first annular column and a second connecting portion engaged with the sealing portion, and the first connecting portion and the second connecting portion are connected by a third connecting portion.

6. The battery cell as recited in claim 1 wherein the inner housing has an axial dimension that is less than an axial dimension of the outer housing.

7. The battery cell as recited in claim 1 wherein the first annular column of the inner housing, and/or the outer housing, is provided with an explosion proof portion.

8. The battery cell of claim 1, wherein an axis of the cell is collinear with an axis of the inner housing and/or an axis of the cell is collinear with an axis of the outer housing.

9. The battery cell of claim 1, wherein the inner housing has a wall thickness in a range of: 0.05 mm-0.15 mm, and the wall thickness of the shell ranges from 0.05 mm-0.15 mm.

10. An electronic device, characterized in that the electronic device comprises a device main body and the battery cell of any one of claims 1 to 9, the battery cell being provided on the device main body and electrically connected to the device main body.