CN111554984A - Battery structure and electronic equipment - Google Patents
Battery structure and electronic equipment Download PDFInfo
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- CN111554984A CN111554984A CN202010498904.7A CN202010498904A CN111554984A CN 111554984 A CN111554984 A CN 111554984A CN 202010498904 A CN202010498904 A CN 202010498904A CN 111554984 A CN111554984 A CN 111554984A
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- electrode
- pole piece
- battery structure
- circular groove
- insulating
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- 238000003466 welding Methods 0.000 claims description 26
- 239000004020 conductor Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 description 12
- 210000002421 cell wall Anatomy 0.000 description 6
- 210000004027 cell Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 241000463219 Epitheca Species 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention provides a battery structure, comprising: the device comprises an upper shell, a lower shell, a first pole piece, a second pole piece, an insulating diaphragm and an electrode; the first pole piece, the insulating diaphragm and the second pole piece are sequentially stacked and wound by taking the electrode as an axis, the electrode is located at the axis of the battery structure, the upper shell and the lower shell cover form an accommodating space, and the first pole piece, the second pole piece, the insulating diaphragm and the electrode are accommodated in the accommodating space. The embodiment of the invention can improve the energy density of the battery structure.
Description
Technical Field
The present invention relates to battery technologies, and in particular, to a battery structure and an electronic device.
Background
With the development and progress of science and technology, the market demand for wearable electronic devices, such as wireless earphones, sports watches, and wristbands, is increasing, and lithium batteries are important components of wearable electronic devices. In addition to small-sized electric appliances for civil use, lithium batteries are also widely used in military applications. The positive plate, the diaphragm and the negative plate in the conventional battery structure are formed by winding, the space in the battery core is not fully utilized after winding and needle drawing, and the energy density of the battery structure is low.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a battery structure and an electronic device, so as to solve the problem of low energy density of the battery structure.
In order to achieve the above object, an embodiment of the present invention provides a battery structure, including: the device comprises an upper shell, a lower shell, a first pole piece, a second pole piece, an insulating diaphragm and an electrode; the first pole piece, the insulating diaphragm and the second pole piece are sequentially stacked and wound by taking the electrode as an axis, the electrode is located at the axis of the battery structure, the upper shell and the lower shell cover form an accommodating space, and the first pole piece, the second pole piece, the insulating diaphragm and the electrode are accommodated in the accommodating space.
Optionally, the electrode comprises: the battery structure comprises a first electrode and a second electrode, wherein the first electrode and the second electrode are oppositely embedded to form a first cylinder, the insulating diaphragm is arranged between the first electrode and the second electrode, the first pole piece, the insulating diaphragm and the second pole piece are wound by taking the first cylinder as an axis, and the first cylinder is positioned at the axis of the battery structure.
Optionally, the first electrode and the second electrode both include metal.
Optionally, the battery structure further includes: a first spring plate; the first end of the first elastic sheet is abutted with the second electrode, and the second end of the first elastic sheet is abutted with the upper shell; the first electrode is connected with the first pole piece, and the second electrode is connected with the second pole piece.
Optionally, the battery structure further includes: a second elastic sheet; the first end of the second elastic sheet is abutted with the first electrode, and the second end of the second elastic sheet is abutted with the lower shell.
Optionally, the epitheca is first circular recess, the inferior valve is the circular recess of second, the notch of first circular recess with the notch of the circular recess of second is relative, just the cell wall of first circular recess is acceptd in the circular recess of second, the cell wall of first circular recess with the cell wall laminating setting of the circular recess of second, just the surface of the cell wall of first circular recess with be provided with insulating seal circle between the internal surface of the cell wall of the circular recess of second, insulating seal circle is followed the internal surface of the cell wall of the circular recess of second extends to the tank bottom of the circular recess of second, the epitheca with at least one in the inferior valve is provided with the welding hole.
Optionally, a first welding hole is formed in the center of the upper shell, a second welding hole is formed in the center of the lower shell, a first conductive material is filled in the first welding hole, and the first conductive material is connected with the second electrode; and a second conductive material is filled in the second welding hole and is connected with the first electrode.
Optionally, the sum of the lengths of the first pole piece and the second pole piece is smaller than the length of the insulating diaphragm, and the inner surface of the groove wall of the first circular groove is in contact with the insulating diaphragm.
Optionally, in the height direction of the battery structure, the height of the first cylinder is greater than the height of the insulating diaphragm.
The embodiment of the invention also provides electronic equipment, which is characterized by comprising the battery structure provided by the embodiment of the invention.
One of the above technical solutions has the following advantages or beneficial effects:
in the embodiment of the invention, the battery structure comprises: the device comprises an upper shell, a lower shell, a first pole piece, a second pole piece, an insulating diaphragm and an electrode; the first pole piece, the insulating diaphragm and the second pole piece are sequentially stacked and wound by taking the electrode as an axis, the electrode is located at the axis of the battery structure, the upper shell and the lower shell cover form an accommodating space, and the first pole piece, the second pole piece, the insulating diaphragm and the electrode are accommodated in the accommodating space. Compared with the prior art that the positive plate, the diaphragm and the negative plate of the battery structure are formed by winding, the space in the battery core is not fully utilized after winding and needle drawing, and the embodiment of the invention can improve the energy density of the battery structure.
Drawings
Fig. 1 is a schematic cross-sectional view of a battery structure according to an embodiment of the present invention;
FIG. 2 is another schematic cross-sectional view of a battery structure according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of another cell configuration provided by an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of another cell configuration provided by an embodiment of the present invention;
fig. 5 is a schematic diagram of an upper case of a battery structure according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description is made with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a cross-sectional schematic view of a battery structure, as shown in fig. 1, including: an upper shell 11, a lower shell 12, a first pole piece 13, a second pole piece 14, an insulating diaphragm 15 and an electrode 16; the first pole piece 13, the insulating diaphragm 15 and the second pole piece 14 are sequentially stacked, the electrode 16 is used as an axis to be wound, the electrode 16 is located at the axis of the battery structure, the upper shell 11 and the lower shell 12 are covered to form an accommodating space, and the first pole piece 13, the second pole piece 14, the insulating diaphragm 15 and the electrode 16 are accommodated in the accommodating space.
The first pole piece 13 can be used as a positive pole piece in a battery structure, the second pole piece 14 can be used as a negative pole piece in the battery structure, and the insulating diaphragm 15 is used for separating the positive pole piece and the negative pole piece in the battery to prevent internal short circuit of the battery. The upper shell 11 and the lower shell 12 are not in direct contact, and an insulating substance is arranged between the upper shell and the lower shell to prevent the short circuit of the battery caused by the connection of the positive electrode and the negative electrode. The upper shell 11 and the lower shell 12 are covered to form a sealed shell. The upper shell 11 is connected with a positive electrode in the electrode 16, and the lower shell 12 is connected with a negative electrode in the electrode 16, and the connection mode can be contact, riveting or laser welding and the like.
In the embodiment of the present invention, the type of the battery structure is not limited, for example, the battery structure may be a structure of a rechargeable battery, and the battery structure may also be a structure of a primary battery, which is not limited in this embodiment of the present invention. The first pole piece 13, the insulating diaphragm 15, and the second pole piece 14 are wound around the electrode 16, and the winding direction may be clockwise or counterclockwise, which is not limited in the embodiment of the present invention. The electrode 16 may have a cylindrical shape or a rectangular parallelepiped shape. The battery structure can be in a cylindrical shape or a rectangular parallelepiped shape.
In the embodiment of the invention, the first pole piece 13, the insulating diaphragm 15 and the second pole piece 14 are sequentially stacked and wound by taking the electrode 16 as an axis, the electrode 16 is positioned at the axis of the battery structure, the electrode 16 arranged at the axis just fills a hole left by winding, the electrode 16 does not occupy redundant space, the space is fully and reasonably utilized, and the energy density of the battery structure is improved. The battery structure does not need to draw a needle after winding is completed, so that the process flow is simplified, and the production efficiency is improved.
As an alternative embodiment, as shown in fig. 2, the electrode 16 includes: the battery structure comprises a first electrode 161 and a second electrode 162, wherein the first electrode 161 and the second electrode 162 are oppositely embedded to form a first cylinder, the insulating diaphragm 15 is arranged between the first electrode 161 and the second electrode 162, the first pole piece 13, the insulating diaphragm 15 and the second pole piece 14 are wound around the first cylinder serving as an axis, and the first cylinder is positioned at the axis of the battery structure.
The first electrode 161 may serve as a positive electrode in a battery structure, and the second electrode 162 may serve as a negative electrode in the battery structure.
As shown in fig. 2, the first electrode 161 includes: the device comprises a first semi-cylinder and a first semi-disc, wherein the first semi-cylinder and the first semi-disc are vertically arranged, and the first semi-disc is arranged at one end of the first semi-cylinder; the second electrode 162 includes: the second half cylinder and second semicircle dish, the second half cylinder with the second semicircle dish sets up perpendicularly, the second semicircle dish set up in the one end of second half cylinder.
The first end of the first pole piece 13 is attached to the first semi-cylinder, the first end of the second pole piece 14 is attached to the second semi-cylinder, and the insulating diaphragm 15 is arranged between the first pole piece 11 and the second pole piece 12. A first insulating layer 17 is arranged between the first semicircular disc and the second semicircular cylinder, and a second insulating layer 18 is arranged between the second semicircular disc and the first semicircular cylinder. The thickness of the first insulating layer 17 and the second insulating layer 18 is 0.02-0.2 mm. The first insulating layer 16 and the second insulating layer 17 are used for preventing the contact between the positive electrode and the negative electrode in the battery structure, and improving the safety of the battery structure.
The electrode 16 is in a cylindrical shape, the first pole piece 13, the insulating diaphragm 15 and the second pole piece 14 are wound around the first cylinder serving as a shaft, and the first cylinder is located at the shaft center of the battery structure, so that the energy density of the battery structure is improved.
As an alternative embodiment, the first electrode 161 and the second electrode 162 each include a metal.
In the embodiment, because the electrode comprises metal, when the battery is moved by workers, the battery can be adsorbed by the magnet and then moved, so that the operation of the workers is facilitated, and the production efficiency is improved.
As an alternative embodiment, as shown in fig. 3, the battery structure further includes: a first spring plate 19; a first end of the first elastic sheet 19 abuts against the second electrode 162, and a second end of the first elastic sheet 19 abuts against the upper shell 11; the first electrode 161 is connected to the first pole piece 13, and the second electrode 162 is connected to the second pole piece 14.
In this embodiment, a first end of the first resilient sheet 19 is fixedly connected to the second electrode 162, a second end of the first resilient sheet 19 is fixedly connected to the upper case 11, the first resilient sheet 19 is compressed between the second electrode 162 and the upper case 11, and outward tension exists at two ends of the compressed first resilient sheet 19, so that the connection between the second electrode 162 and the upper case 11 is firmer and more stable.
As an optional implementation, the battery structure further includes: a second elastic sheet 20; a first end of the second resilient plate 20 abuts against the first electrode 161, and a second end of the second resilient plate 20 abuts against the lower shell 12.
In this embodiment, a first end of the second resilient tab 20 is fixedly connected to the first electrode 161, a second end of the second resilient tab 20 is fixedly connected to the lower case 12, the second resilient tab 20 is compressed between the first electrode 161 and the lower case 12, and outward tension exists at two ends of the compressed second resilient tab 20, so that the connection between the first electrode 161 and the lower case 12 is firmer and more stable. The first elastic sheet 19 and the second elastic sheet 20 are both conductive elastic sheets.
As an alternative embodiment, as shown in fig. 4, the upper shell 11 is a first circular groove, the lower shell 12 is a second circular groove, a notch of the first circular groove is opposite to a notch of the second circular groove, a groove wall of the first circular groove is accommodated in the second circular groove, a groove wall of the first circular groove and a groove wall of the second circular groove are attached to each other, an insulating seal ring 21 is disposed between an outer surface of the groove wall of the first circular groove and an inner surface of the groove wall of the second circular groove, the insulating seal ring 21 extends from the inner surface of the groove wall of the second circular groove to a groove bottom of the second circular groove, and at least one of the upper shell 11 and the lower shell 12 is provided with a welding hole.
The insulating sealing ring 21 may be made of elastic plastic material, and the insulating sealing ring 21 is used for separating the upper shell 11 from the lower shell 12, and the upper shell 11 is not in contact with the lower shell 12. The battery structure has good sealing performance. Go up the shell 11 with at least one of inferior valve 12 is provided with the welding hole, is connecting first electrode 161 with go up shell 11, perhaps connect second electrode 162 with during inferior valve 12, the visual operation of welded is made things convenient for in the setting up of welding hole, and the staff can observe battery inner structure when the welding, improves welded accuracy, reduces the technology degree of difficulty.
As an alternative embodiment, a first welding hole 111 is formed at the center of the upper case 11, a second welding hole 121 is formed at the center of the lower case 12, and a first conductive material is filled in the first welding hole 111 and connected to the second electrode 162; the second welding hole 121 is filled with a second conductive material, and the second conductive material is connected to the first electrode 161.
In this embodiment, the first conductive material and the second conductive material may be the same. The first welding hole 111 is opposite to the electrode 16, and the second welding hole 121 is opposite to the electrode 16. When the upper case 11 and the second electrode 162 are welded, or the second electrode 162 and the lower case 12 are welded, the welding is more accurate, the process difficulty is lower, the welding is more firm, and after the welding is completed, the first welding hole 111 and the second welding hole 121 are sealed, so that the electrolyte inside the battery is prevented from being exposed.
As an alternative embodiment, the sum of the lengths of the first pole piece 13 and the second pole piece 14 is smaller than the length of the insulating diaphragm 15, and the inner surface of the groove wall of the first circular groove is in contact with the insulating diaphragm 15.
The outmost layer of the winding core in the battery structure is the insulating diaphragm 15, so that the safety of the winding core is improved.
As an alternative embodiment, as shown in fig. 2, the height of the first cylinder is greater than the height of the insulating separator 15 in the height direction of the battery structure.
In the height direction of the cell structure, the outer side of the axial center position of the winding core is the first electrode 161 or the second electrode 162, the outer end face of the first electrode 161 exceeds the end face of the insulating diaphragm 15 by 0.1-1.0mm, and the outer end face of the second electrode 162 exceeds the end face of the insulating diaphragm 15 by 0.1-1.0mm, as shown in fig. 2, that is, the thickness of the first half disc and the second half disc is 0.1-1.0 mm; the first electrode 14 and the second electrode 15 are conveniently connected with other substances in the battery.
In the embodiment of the invention, the battery structure comprises: an upper shell 11, a lower shell 12, a first pole piece 13, a second pole piece 14, an insulating diaphragm 15 and an electrode 16; the first pole piece 13, the insulating diaphragm 15 and the second pole piece 14 are sequentially stacked, the electrode 16 is used as an axis to be wound, the electrode 16 is located at the axis of the battery structure, the upper shell 11 and the lower shell 12 are covered to form an accommodating space, and the first pole piece 13, the second pole piece 14, the insulating diaphragm 15 and the electrode 16 are accommodated in the accommodating space. Compared with the prior art that the positive plate, the diaphragm and the negative plate of the battery structure are formed by winding, the space in the battery core is not fully utilized after winding and needle drawing, and the embodiment of the invention can improve the energy density of the battery structure.
In addition, in an embodiment of the present invention, an electronic device including the battery structure according to any of the embodiments provided in the embodiment of the present invention is also provided.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A battery structure, comprising: the device comprises an upper shell, a lower shell, a first pole piece, a second pole piece, an insulating diaphragm and an electrode; the first pole piece, the insulating diaphragm and the second pole piece are sequentially stacked and wound by taking the electrode as an axis, the electrode is located at the axis of the battery structure, the upper shell and the lower shell cover form an accommodating space, and the first pole piece, the second pole piece, the insulating diaphragm and the electrode are accommodated in the accommodating space.
2. The battery structure of claim 1, wherein the electrode comprises: the battery structure comprises a first electrode and a second electrode, wherein the first electrode and the second electrode are oppositely embedded to form a first cylinder, the insulating diaphragm is arranged between the first electrode and the second electrode, the first pole piece, the insulating diaphragm and the second pole piece are wound by taking the first cylinder as an axis, and the first cylinder is positioned at the axis of the battery structure.
3. The battery structure of claim 2, wherein the first electrode and the second electrode each comprise a metal therein.
4. The battery structure of claim 2, further comprising: a first spring plate; the first end of the first elastic sheet is abutted with the second electrode, and the second end of the first elastic sheet is abutted with the upper shell; the first electrode is connected with the first pole piece, and the second electrode is connected with the second pole piece.
5. The battery structure of claim 4, further comprising: a second elastic sheet; the first end of the second elastic sheet is abutted with the first electrode, and the second end of the second elastic sheet is abutted with the lower shell.
6. The battery structure according to claim 2, wherein the upper case is a first circular groove, the lower case is a second circular groove, a notch of the first circular groove is opposite to a notch of the second circular groove, a groove wall of the first circular groove is received in the second circular groove, the groove wall of the first circular groove and the groove wall of the second circular groove are attached to each other, an insulating seal ring is disposed between an outer surface of the groove wall of the first circular groove and an inner surface of the groove wall of the second circular groove, the insulating seal ring extends from the inner surface of the groove wall of the second circular groove to a groove bottom of the second circular groove, and at least one of the upper case and the lower case is provided with a welding hole.
7. The battery structure according to claim 6, wherein a first welding hole is formed at the center of the upper case, a second welding hole is formed at the center of the lower case, and a first conductive material filled in the first welding hole is connected to the second electrode; and a second conductive material is filled in the second welding hole and is connected with the first electrode.
8. The battery structure of claim 6, wherein a sum of lengths of the first pole piece and the second pole piece is less than a length of the insulating separator, and an inner surface of a groove wall of the first circular groove is in contact with the insulating separator.
9. The battery structure of claim 2, wherein the height of the first cylinder is greater than the height of the insulating separator in the height direction of the battery structure.
10. An electronic device, characterized in that the battery device comprises a battery structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010498904.7A CN111554984A (en) | 2020-06-04 | 2020-06-04 | Battery structure and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010498904.7A CN111554984A (en) | 2020-06-04 | 2020-06-04 | Battery structure and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111554984A true CN111554984A (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010498904.7A Pending CN111554984A (en) | 2020-06-04 | 2020-06-04 | Battery structure and electronic equipment |
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| Country | Link |
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| CN (1) | CN111554984A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113067041A (en) * | 2021-03-22 | 2021-07-02 | 宁德新能源科技有限公司 | Battery cell and electronic device |
| WO2022151788A1 (en) * | 2021-01-18 | 2022-07-21 | 江苏德立信电子科技有限公司 | Cylindrical lithium battery and preparation method therefor |
-
2020
- 2020-06-04 CN CN202010498904.7A patent/CN111554984A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022151788A1 (en) * | 2021-01-18 | 2022-07-21 | 江苏德立信电子科技有限公司 | Cylindrical lithium battery and preparation method therefor |
| CN113067041A (en) * | 2021-03-22 | 2021-07-02 | 宁德新能源科技有限公司 | Battery cell and electronic device |
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