CN210110969U - Lithium battery with winding type battery core - Google Patents

Lithium battery with winding type battery core Download PDF

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Publication number
CN210110969U
CN210110969U CN201920434788.5U CN201920434788U CN210110969U CN 210110969 U CN210110969 U CN 210110969U CN 201920434788 U CN201920434788 U CN 201920434788U CN 210110969 U CN210110969 U CN 210110969U
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China
Prior art keywords
lithium battery
battery
shell
positive plate
utmost point
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CN201920434788.5U
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Chinese (zh)
Inventor
曾宪锋
郑周兵
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Dongguan Chuangming Battery Technology Co Ltd
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Dongguan Chuangming Battery Technology Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The utility model provides a lithium battery with a winding type battery cell, which comprises a shell and a battery cell, wherein the shell wraps the battery cell, the battery cell is formed by winding a roll tape, and the roll tape comprises a first insulating diaphragm, a positive plate, a second insulating diaphragm and a negative plate which are sequentially stacked from inside to outside; the positive plate and the negative plate are both provided with tabs. The utility model provides a lithium cell of coiling type electricity core reduces the charge-discharge resistance, realizes the high magnification charge-discharge, has promoted the security performance simultaneously.

Description

Lithium battery with winding type battery core
Technical Field
The utility model belongs to the technical field of the lithium cell, more specifically say, relate to a lithium cell of coiling formula electricity core.
Background
Along with the increasing demand of electronic products, people also use the lithium cell more and more closely, in order to satisfy user to the daily demand of lithium cell, the variety of lithium cell is various, and the safety problem of the lithium cell that produces from this also receives more and more attention of user.
At present, the process of the lithium battery with the existing winding type battery cell generally adopts a diaphragm outsourcing process, and the battery cell of the lithium battery is not easy to dissipate heat under the condition of short circuit, so that the temperature of the battery cell is too high, and the dangerous conditions of combustion and even explosion exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a lithium cell of coiling formula electricity core to the difficult radiating technical problem when solving the lithium cell electricity core that exists among the prior art and taking place the short circuit.
In order to achieve the above object, the utility model adopts the following technical scheme: provided is a lithium battery of a winding type battery cell, including: the battery comprises a shell and a battery cell, wherein the shell wraps the battery cell, the battery cell is formed by winding a winding core tape, and the winding core tape comprises a first insulating diaphragm, a positive plate, a second insulating diaphragm and a negative plate which are sequentially stacked from inside to outside; and the positive plate and the negative plate are both provided with lugs.
Further, the first insulating membrane has a pre-rolled section located at the center of the cell.
Further, two ends of the second insulating diaphragm respectively extend out of two ends of the positive plate.
Further, the positive plate is provided with a first conductive coating, and the negative plate is provided with a second conductive coating.
Further, the first conductive coating is an aluminum foil layer, and the second conductive coating is a copper foil layer.
Furthermore, both ends of the inner surface and both ends of the outer surface of the negative plate are provided with blank areas.
Further, the shell is a steel shell and is abutted to the second conductive coating.
Further, the housing is cylindrical and has opposite first and second ends.
Further, utmost point ear includes first utmost point ear and second utmost point ear, positive plate is provided with first utmost point ear, the negative pole piece is provided with the second utmost point ear, first utmost point ear is followed the inner edge of positive plate the axial extension of electricity core reaches first end, the second utmost point ear is followed the inner edge of negative plate the axial extension of electricity core reaches the second end.
Further, the lithium battery also comprises electrolyte, and the electrolyte is filled in the shell.
The utility model provides a lithium cell of coiling type electricity core's beneficial effect lies in: compared with the prior art, the battery core of the lithium battery adopts a mode of cathode outsourcing, so that the second conductive coating of the cathode is abutted against the shell, and high-rate charging and discharging are realized; reduce and fill resistance value, through the quick heat dissipation of second conductive coating to the casing under the condition that the short circuit takes place for electric core, improve just, the anode material takes place and can save first insulating diaphragm and second insulating diaphragm's material quantity because of the dangerous condition that high temperature chemical reaction arouses burning, explosion.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a first three-dimensional structure diagram of a lithium battery with a winding type battery cell provided in an embodiment of the present invention;
fig. 2 is a second three-dimensional structure diagram of a lithium battery with a winding type battery cell provided in an embodiment of the present invention;
fig. 3 is a front view structural diagram of a lithium battery with a winding type battery cell provided in an embodiment of the present invention;
fig. 4 is an explosion structure diagram of a lithium battery with a winding type battery cell provided by the embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1: battery cell 11: first end part
12: second end portion 2: first insulating diaphragm
21: pre-rolling section 3: positive plate
31: first tab 4: second insulating diaphragm
5: negative electrode tab 51: white space area
52: second pole ear
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 and fig. 4 together, a lithium battery with a winding type battery cell according to the present embodiment will now be described. The lithium battery with the winding type battery core comprises a shell and the battery core 1, wherein the shell wraps the battery core 1, the battery core 1 is formed by winding a winding core tape, and the winding core tape comprises a first insulating diaphragm 2, a positive plate 3, a second insulating diaphragm 4 and a negative plate 5 which are sequentially stacked from inside to outside; the positive plate 3 and the negative plate 5 are both provided with tabs.
According to the lithium battery with the winding type battery cell, the battery cell 1 adopts a mode of cathode outsourcing, so that the second conductive coating of the cathode is abutted against the shell, and high-rate charge and discharge are realized; reduce the charge-discharge resistance, dispel the heat to the casing fast through the second conductive coating under the condition that electric core 1 takes place the short circuit, improve just, the negative pole material takes place and can save first insulating diaphragm 2 and the material quantity of second insulating diaphragm 4 because of the dangerous condition of high temperature chemical reaction arouses burning, explosion.
Referring to fig. 1 to 2 together, as a specific embodiment of the lithium battery with a winding type cell provided in this embodiment, a cell 1 is wrapped in a casing, the cell 1 is formed by winding a winding core tape, the winding core tape includes a first insulating diaphragm 2, a positive electrode sheet 3, a second insulating diaphragm 4 and a negative electrode sheet 5 which are sequentially stacked from inside to outside, and preferably, the negative electrode sheet 5, the first insulating diaphragm 2, the positive electrode sheet 3 and the second insulating diaphragm 4 are wound counterclockwise, so that the negative electrode sheet 5 is located at the outermost side of the cell 1; set up first conductive coating on positive plate 3, set up the conductive coating of second on negative pole piece 5, preferably, first conductive coating adopts the aluminium foil layer, and the conductive coating of second adopts the copper foil layer, because aluminium foil layer and copper foil layer electric conductivity are good, the texture is softer, and both homoenergetic form the oxide protection film on the surface. The casing is cylindrical and is provided with a first end part 11 and a second end part 12 which are opposite, the positive plate 3 and the negative plate 5 are both provided with tabs which comprise a first tab 31 and a second tab 52, the positive plate 3 is provided with the first tab 31, the negative plate 5 is provided with the second tab 52, the first tab 31 extends from the inner end of the positive plate 3 to the first end part 11 along the axial direction of the electric core 1, and the second tab 52 extends from the inner end of the negative plate 5 to the second end part 12 along the axial direction of the electric core 1; the lithium battery further comprises electrolyte filled in the shell and used for converting chemical energy into electric energy.
Referring to fig. 3 to 4, in the present embodiment, both ends of the inner surface and both ends of the outer surface of the negative electrode sheet 5 have the blank areas 51, and the blank areas 51 prevent the second conductive coating coated on the inner surface and the outer surface of the negative electrode sheet 5 from falling off during the winding process due to the requirement of the manufacturing process; the first insulating diaphragm 2 is provided with a pre-rolling section 21 positioned in the center of the battery core 1, and during winding, the pre-rolling section 21 of the first insulating diaphragm 2 is pre-rolled firstly, and then the positive plate 3 and the negative plate 5 are rolled in, so that the purpose is to isolate the positive plate 3 and the negative plate 5 and prevent short circuit after the battery is stored; the negative plate 5 is pre-rolled, because the blank areas 51 are required to be arranged at two ends of the inner surface and two ends of the outer surface of the negative plate 5 according to the requirements of the manufacturing process, a second conductive coating is not arranged on the blank areas 51, the second conductive coating is prevented from falling off during pre-rolling, the blank areas 51 are not required to be arranged on the positive plate 3, therefore, the positive plate 3 is wrapped between the first insulating diaphragm 2 and the second insulating diaphragm 4, the positive plate 3 is inserted after the negative plate 5 is pre-rolled to prevent the first conductive coating on the positive plate 3 from falling off, the negative plate 5, the first insulating diaphragm 2, the positive plate 3 and the second insulating diaphragm 4 are continuously wound in the anticlockwise direction, and the winding is fixed by using a stop adhesive; preferably, both ends of the second insulating separator 4 extend beyond both ends of the positive electrode tab 3, respectively, in order to isolate the positive electrode tab 3 from the negative electrode tab 5 and prevent short circuit of the battery itself after power storage. The shell is a steel shell and is abutted with the second conductive coating, so that high-rate charge and discharge can be realized, the resistance value during charge and discharge can be effectively reduced, and when the inside of the battery cell 1 is short-circuited, the second conductive coating can be used for quickly dissipating heat to the shell, so that the situations of combustion and explosion of positive and negative electrode materials caused by high-temperature chemical reaction are improved; because the winding type battery cell 1 in the embodiment is wrapped by the negative plate 5, the use amount of the materials of the first insulating diaphragm 2 and the second insulating diaphragm 4 can be saved, and the cost is reduced.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a lithium cell of coiling formula electricity core which characterized in that: the battery comprises a shell and a battery cell, wherein the shell wraps the battery cell, the battery cell is formed by winding a winding core tape, and the winding core tape comprises a first insulating diaphragm, a positive plate, a second insulating diaphragm and a negative plate which are sequentially stacked from inside to outside; the positive plate and the negative plate are both provided with tabs; the first insulating membrane is provided with a pre-winding section positioned in the center of the battery cell; the positive plate is provided with a first conductive coating, the negative plate is provided with a second conductive coating, and the shell is abutted to the second conductive coating.
2. The lithium battery of wound cells of claim 1, wherein: and two ends of the second insulating diaphragm respectively extend out of two ends of the positive plate.
3. The lithium battery of wound cells of claim 1, wherein: the first conductive coating is an aluminum foil layer, and the second conductive coating is a copper foil layer.
4. The lithium battery of wound cells of claim 1, wherein: and both ends of the inner surface and both ends of the outer surface of the negative plate are provided with blank areas.
5. The lithium battery of wound cells of claim 1, wherein: the shell is a steel shell.
6. The lithium battery of wound cells of claim 1, wherein: the housing is cylindrical and has opposite first and second ends.
7. The lithium battery of wound cells of claim 6, wherein: the utmost point ear includes first utmost point ear and second utmost point ear, positive plate is provided with first utmost point ear, the negative pole piece is provided with the second utmost point ear, first utmost point ear is followed the inner edge of positive plate the axial extension of electric core extends to first end, the second utmost point ear is followed the inner edge of negative pole piece the axial extension of electric core extends to the second end.
8. The lithium battery of wound cells of claim 1, wherein: the lithium battery further comprises electrolyte, and the electrolyte is filled in the shell.
CN201920434788.5U 2019-04-01 2019-04-01 Lithium battery with winding type battery core Active CN210110969U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920434788.5U CN210110969U (en) 2019-04-01 2019-04-01 Lithium battery with winding type battery core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920434788.5U CN210110969U (en) 2019-04-01 2019-04-01 Lithium battery with winding type battery core

Publications (1)

Publication Number Publication Date
CN210110969U true CN210110969U (en) 2020-02-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112259806A (en) * 2020-10-30 2021-01-22 东莞市创明电池技术有限公司 Manufacturing method of winding type battery and winding type battery semi-finished product structure
WO2022228194A1 (en) * 2021-04-28 2022-11-03 广东微电新能源有限公司 Cell, energy storage device and electronic apparatus
WO2023155616A1 (en) * 2022-02-18 2023-08-24 惠州亿纬锂能股份有限公司 Lithium battery

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112259806A (en) * 2020-10-30 2021-01-22 东莞市创明电池技术有限公司 Manufacturing method of winding type battery and winding type battery semi-finished product structure
CN112259806B (en) * 2020-10-30 2022-05-17 东莞市创明电池技术有限公司 Manufacturing method of winding type battery and winding type battery semi-finished product structure
WO2022228194A1 (en) * 2021-04-28 2022-11-03 广东微电新能源有限公司 Cell, energy storage device and electronic apparatus
WO2023155616A1 (en) * 2022-02-18 2023-08-24 惠州亿纬锂能股份有限公司 Lithium battery

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