CN212571274U - Lithium ion battery and electronic device - Google Patents
Lithium ion battery and electronic device Download PDFInfo
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- CN212571274U CN212571274U CN202021647995.8U CN202021647995U CN212571274U CN 212571274 U CN212571274 U CN 212571274U CN 202021647995 U CN202021647995 U CN 202021647995U CN 212571274 U CN212571274 U CN 212571274U
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- 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
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- 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
Abstract
The utility model discloses a lithium ion battery and electronic equipment, the lithium ion battery includes the casing and sets up the coiling type electric core in the casing, the coiling type electric core includes positive plate, negative pole piece and diaphragm, positive plate and negative pole piece range upon range of and coil, the diaphragm is spaced between adjacent positive plate and negative pole piece; the positive plate comprises a positive base material, and a first active coating is arranged on the surface of the positive base material; the negative plate comprises a negative substrate, and a second active coating is arranged on the surface of the negative substrate; coiling formula electricity core still includes: the positive electrode tabs and the negative electrode tabs are distributed along the axial direction of the winding type battery core, at least part of the positive electrode tabs extend out from the edge of the positive electrode base material, and at least part of the negative electrode tabs extend out from the edge of the negative electrode base material. The utility model provides an at least partial utmost point ear and pole piece substrate integrated into one piece, this many utmost point ear's structure can not increase the thickness of battery, can reduce the battery internal resistance, increases the battery ability of overflowing, effectively improves the energy density of battery.
Description
Technical Field
The utility model relates to a lithium cell technical field, concretely relates to lithium ion battery and electronic equipment.
Background
Lithium ion batteries have the outstanding advantages of high operating voltage, high energy density, high specific capacity, rapid charge and discharge, and the like, and are widely applied to electronic devices such as mobile phones, notebook computers, portable testers, and the like.
The battery roll core of the current commonly used lithium ion battery is formed by winding a positive plate and a negative plate, the positive plate and the negative plate are separated by an insulating diaphragm, the positive plate of the conventional lithium ion battery is generally connected with a positive tab, the negative plate is connected with a negative tab, and the two tabs have large internal resistance and limited overcurrent capacity. In contrast, a multi-tab technology is developed by welding a plurality of tabs on the positive plate and the negative plate, the multi-tabs are welded on the battery plate, the thickness of the battery is increased under the condition that the capacity of the battery is not changed, and the energy density of the battery is reduced.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a lithium ion battery and an electronic device.
In one aspect, the utility model provides a lithium ion battery, include: the winding type battery cell comprises a positive plate, a negative plate and a diaphragm, wherein the positive plate and the negative plate are stacked and wound, and the diaphragm is arranged between the adjacent positive plate and the negative plate;
the positive plate comprises a positive base material, and a first active coating is arranged on the surface of the positive base material;
the negative plate comprises a negative substrate, and a second active coating is arranged on the surface of the negative substrate;
the winding type battery cell further comprises:
the winding type battery cell comprises a plurality of positive lugs and a plurality of negative lugs, wherein the positive lugs and the negative lugs are distributed along the axial direction of the winding type battery cell, at least part of the positive lugs extend out from the edge of a positive base material, and at least part of the negative lugs extend out from the edge of a negative base material.
Preferably, the plurality of positive lugs are arranged in a staggered manner along the circumferential direction of the winding type battery cell.
Preferably, part or all of the positive electrode tabs are stacked and arranged along the radial direction of the winding type battery core.
Preferably, the plurality of negative electrode tabs are arranged along the circumferential direction of the winding type battery cell in a staggered manner.
Preferably, part or all of the negative electrode tabs are stacked and arranged along the radial direction of the winding type battery core.
Preferably, the positive tab and the negative tab are located at the same axial end of the winding type battery cell;
and the positive electrode lugs and the negative electrode lugs are arranged in a staggered manner along the circumferential direction of the winding type battery cell.
Preferably, the size of the negative electrode plate is not smaller than the size of the positive electrode plate, and the size of the separator is not smaller than the size of the negative electrode plate.
Preferably, at least one positive tab and at least one negative tab are inserted outside the shell, and the connecting part of the shell and the positive tab and the connecting part of the shell and the negative tab are respectively provided with an insulating sheath.
On the other hand, the utility model provides an electronic equipment, including above-mentioned lithium ion battery.
Compared with the prior art, the embodiment of the utility model provides an among the lithium ion battery, at least partial anodal ear is extended by the border of anodal substrate and is formed, and at least partial negative pole ear is extended by the border of negative pole substrate and is formed, and at least partial utmost point ear and pole piece substrate integrated into one piece shaping promptly, the structure of this many utmost point ears can not increase the thickness of battery, can reduce the battery internal resistance, increases the battery ability of overflowing, effectively improves the energy density of battery.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a perspective structural diagram of a lithium ion battery provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wound cell in a lithium ion battery provided in an embodiment of the present invention;
fig. 3 to fig. 4 are process diagrams for forming the positive plate and the positive tab according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 and 2, an embodiment of the present invention provides a lithium ion battery, including: the winding type battery cell comprises a shell 1 and a winding type battery cell 2 arranged in the shell 1, wherein electrolyte is also filled in the shell 1, the winding type battery cell 2 is positioned in the electrolyte, the winding type battery cell 2 comprises a positive plate 21, a negative plate 22 and a diaphragm 23, the positive plate 21 and the negative plate 22 are stacked and wound, and the diaphragm 23 is spaced between the adjacent positive plate 21 and negative plate 23;
the positive plate 21 comprises a positive base material, and a first active coating is arranged on the surface of the positive base material;
the negative plate 22 comprises a negative substrate, and a second active coating is arranged on the surface of the negative substrate;
winding-type electric core 2 further includes:
the positive electrode tabs 24 and the negative electrode tabs 25 are distributed along the axial direction of the winding type battery core 2, at least part of the positive electrode tabs 24 extend out from the edge of the positive electrode base material, and at least part of the negative electrode tabs 25 extend out from the edge of the negative electrode base material.
How to form the positive electrode tab extending from the edge of the positive electrode substrate is further described in conjunction with fig. 3 and 4. As shown in fig. 3, providing a substrate body, where the substrate body includes a region to be coated and a reserved blank region, coating a first active coating on the region to be coated, and the positive electrode substrate and the first active coating form a positive electrode sheet 21; as shown in fig. 4, a plurality of protruding areas are cut out of the reserved blank area by die cutting or laser cutting, the protruding areas form a plurality of positive electrode tabs 24, the positive electrode tabs extend out from the edge of the positive electrode base material, and the positive electrode tabs and the positive electrode base material are of an integrated connection structure.
In a similar manner, negative tabs may be formed extending along the edges of the negative substrate, thereby forming a negative plate and negative tabs connected to the negative plate.
In the lithium ion battery provided in this embodiment, along the axial direction of the wound battery cell, at least part of the positive electrode tab is formed by extending from the edge of the positive electrode base material, and at least part of the negative electrode tab is formed by extending from the edge of the negative electrode base material. For example, part of the positive electrode tab is formed by extending from the edge of the positive electrode base material, the rest of the positive electrode tab is welded on the edge of the positive electrode base material, or the whole positive electrode tab is formed by extending from the edge of the positive electrode base material; part of the negative electrode tabs extend from the edge of the negative electrode base material, the rest of the negative electrode tabs are welded on the edge of the negative electrode base material, or all the negative electrode tabs extend from the edge of the negative electrode base material. The structure that the pole lug is connected with the pole piece can not increase the thickness of the battery, can reduce the internal resistance of the battery, increase the overcurrent capacity of the battery and effectively improve the energy density of the battery. Preferably, the positive electrode base material adopts aluminum foil, the negative electrode base material adopts copper foil, the aluminum foil and the copper foil have good conductivity and soft texture, and oxide protective films can be formed on the surfaces of the aluminum foil and the copper foil.
In some embodiments, the plurality of positive tabs of the positive tab connection are integrally connected and the plurality of negative tabs of the negative tab connection are integrally connected.
Further, the plurality of positive electrode tabs 24 are arranged in a staggered manner along the circumferential direction of the winding type battery cell 2, and the plurality of positive electrode tabs 24 are electrically connected into a whole.
Further, some or all of the positive electrode tabs 24 are stacked and arranged in the radial direction of the winding type battery core 2. For example, it is preferable that all the positive electrode tabs 24 are laminated and welded in the radial direction of the wound electric core 2 to form one positive electrode tab.
Further, the plurality of negative electrode tabs 25 are arranged in a staggered manner along the circumferential direction of the winding type battery cell 2, and the plurality of negative electrode tabs 25 are electrically connected into a whole.
Further, part or all of the negative electrode tabs 25 are stacked and arranged in the radial direction of the wound electric core 2. For example, it is preferable that all the positive electrode tabs 25 are laminated and welded in the radial direction of the wound electric core 2 to form one negative electrode tab.
As an alternative embodiment, the positive tab 24 and the negative tab 25 are located at the same axial end of the winding type battery cell 2; along the circumference of coiling formula electricity core 2, positive ear 24 staggers with negative pole ear 25 and arranges, avoids taking place the short circuit between positive ear and the negative pole ear.
Further, the size of the negative electrode tab 22 is not smaller than the size of the positive electrode tab 21, and the size of the separator 23 is not smaller than the size of the negative electrode tab 22. The size of the negative plate 22 is not smaller than that of the positive plate 21, so that the negative plate 22 can completely receive lithium ions provided by the positive plate 21; the size of the diaphragm 23 is not smaller than that of the negative plate 22, so that when the temperature of the lithium ion battery rises, the diaphragm 23 can always isolate the positive plate 21 from the negative plate 22, short circuit cannot occur, and the safety and reliability of the lithium ion battery in use are improved.
Furthermore, at least one positive tab 24 and at least one negative tab 25 are inserted outside the casing 1, and the connection part of the casing 1 and the positive tab 24 and the connection part of the casing 1 and the negative tab 25 are respectively provided with an insulating sheath.
The common shell can be an aluminum-plastic film shell, an aluminum shell or a steel shell, and the tab and the shell are insulated by arranging the insulating sheath, so that the safety of the lithium ion battery is improved.
For example, the number of the tabs is small, for example, 2 positive tabs are connected to the positive plate, 2 negative tabs are connected to the negative plate, each tab is inserted into the outer portion of the casing through a through hole in the casing, and an insulating sheath is arranged in the through hole.
For example, a longer positive tab can be designed because the lengths of the positive tabs in the axial direction of the winding-type battery cell are different, the lengths of the other positive tabs are consistent, the positive tabs are connected into a whole, and the longest positive tab is inserted out of the casing through the through hole in the casing; a plurality of negative pole ears also can adopt similar design, designs a longer negative pole ear, and the length of other negative pole ears is unanimous, connects a plurality of negative pole ears as an organic whole, and outside the longest negative pole ear passed through the through-hole on the casing and alternates to the casing, was equipped with insulating sheath in the through-hole that supplies utmost point ear to pass on the casing.
For example, it is preferable that all the positive electrode tabs 24 are laminated and welded in the radial direction of the wound cell 2 to form one positive electrode tab, all the positive electrode tabs 25 are laminated and welded in the radial direction of the wound cell 2 to form one negative electrode tab, both the positive electrode tab and the negative electrode tab are inserted through a through hole in the casing to the outside of the casing, and an insulating sheath is provided in the through hole.
Based on the lithium ion battery that above-mentioned embodiment provided, the embodiment of the utility model also provides an electronic equipment, this electronic equipment includes above-mentioned lithium ion battery.
The lithium ion battery has a multi-pole-lug structure, small internal resistance, good overcurrent capacity, good energy density, long service life of the battery, good performance of the battery of corresponding electronic equipment and long service life of the battery.
The above description is only a preferred embodiment of the invention and is intended to illustrate the technical principles applied. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments that can be formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features and (but not limited to) technical features having similar functions disclosed in the present invention are mutually replaced to form the technical solution.
Claims (9)
1. A lithium ion battery comprising: the winding type battery cell comprises a positive plate, a negative plate and a diaphragm, wherein the positive plate and the negative plate are stacked and wound, and the diaphragm is arranged between the adjacent positive plate and the negative plate;
the positive plate comprises a positive base material, and a first active coating is arranged on the surface of the positive base material;
the negative plate comprises a negative substrate, and a second active coating is arranged on the surface of the negative substrate;
its characterized in that, coiling formula electricity core still includes:
the winding type battery cell comprises a plurality of positive lugs and a plurality of negative lugs, wherein the positive lugs and the negative lugs are distributed along the axial direction of the winding type battery cell, at least part of the positive lugs extend out from the edge of a positive base material, and at least part of the negative lugs extend out from the edge of a negative base material.
2. The lithium ion battery of claim 1, wherein the plurality of positive tabs are staggered along a circumferential direction of the wound cell.
3. The lithium ion battery of claim 1, wherein some or all of the positive tabs are arranged in a stacked manner in a radial direction of the wound cell.
4. The lithium ion battery of claim 1, wherein the plurality of negative electrode tabs are staggered along a circumferential direction of the wound cell.
5. The lithium ion battery of claim 1, wherein some or all of the negative electrode tabs are stacked in a radial direction of the wound cell.
6. The lithium ion battery according to any one of claims 1-5, wherein the positive tab and the negative tab are located at the same axial end of the wound cell;
and the positive electrode lugs and the negative electrode lugs are arranged in a staggered manner along the circumferential direction of the winding type battery cell.
7. The lithium ion battery according to claim 1, wherein the size of the negative electrode sheet is not smaller than the size of the positive electrode sheet, and the size of the separator is not smaller than the size of the negative electrode sheet.
8. The lithium ion battery of claim 1, wherein at least one positive tab and at least one negative tab are inserted outside the casing, and an insulating sheath is respectively disposed at a connection portion of the casing and the positive tab and a connection portion of the casing and the negative tab.
9. An electronic device comprising the lithium ion battery according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021647995.8U CN212571274U (en) | 2020-08-10 | 2020-08-10 | Lithium ion battery and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021647995.8U CN212571274U (en) | 2020-08-10 | 2020-08-10 | Lithium ion battery and electronic device |
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| Publication Number | Publication Date |
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| CN212571274U true CN212571274U (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021647995.8U Active CN212571274U (en) | 2020-08-10 | 2020-08-10 | Lithium ion battery and electronic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112864541A (en) * | 2021-03-01 | 2021-05-28 | 昆山宝创新能源科技有限公司 | Laminated battery cell, manufacturing method of laminated battery cell and laminated lithium battery |
| CN114335425A (en) * | 2022-01-12 | 2022-04-12 | 三一技术装备有限公司 | Pole piece, diaphragm, lamination, battery core manufacturing process and battery |
-
2020
- 2020-08-10 CN CN202021647995.8U patent/CN212571274U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112864541A (en) * | 2021-03-01 | 2021-05-28 | 昆山宝创新能源科技有限公司 | Laminated battery cell, manufacturing method of laminated battery cell and laminated lithium battery |
| CN114335425A (en) * | 2022-01-12 | 2022-04-12 | 三一技术装备有限公司 | Pole piece, diaphragm, lamination, battery core manufacturing process and battery |
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