CN108242572B - 3500mAh high-capacity cylindrical lithium battery - Google Patents
3500mAh high-capacity cylindrical lithium battery Download PDFInfo
- Publication number
- CN108242572B CN108242572B CN201711307231.7A CN201711307231A CN108242572B CN 108242572 B CN108242572 B CN 108242572B CN 201711307231 A CN201711307231 A CN 201711307231A CN 108242572 B CN108242572 B CN 108242572B
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- aluminum foil
- 3500mah
- battery
- cylindrical lithium
- lithium battery
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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
- H01M10/058—Construction or manufacture
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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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- 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)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Primary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a 3500mAh high-capacity cylindrical lithium battery which comprises a roll core, wherein the roll core comprises a battery cell formed by winding an anode, a diaphragm and a cathode, and an aluminum foil adhesive tape wound around the battery cell by a circle, wherein the tensile strength of the aluminum foil adhesive tape is more than 80N/25 mm. According to the 3500mAh high-capacity cylindrical lithium battery provided by the invention, the aluminum foil tape is wound on the outermost periphery of the battery core, so that the tensile strength and the high-temperature resistance of the winding core are improved, the impact on the positive and negative electrode plates and the diaphragm under the heavy impact condition can be reduced, and the impact test effect of a battery heavy hammer is improved to a certain extent; and the heat dissipation performance of the winding core is improved, so that the 3500mAh high-capacity cylindrical lithium battery is not easy to change, fire and explode during the heavy hammer impact test, and the potential safety hazard of the battery under the extreme impact condition is reduced.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a 3500mAh high-capacity cylindrical lithium battery.
Background
With the urgent need of the market for high-capacity cylindrical lithium batteries, all large battery manufacturers strive to develop high-capacity cylindrical lithium batteries, but the phenomena of fire and explosion of battery weight impact tests become more and more serious because the content of active substances is increased while the battery capacity is increased. At present, the most outer circle of cylinder lithium cell book core mainly is to use the plastic tape to terminate, and the core that adopts the plastic tape to terminate is carrying out the weight impact test when, and the plastic tape can not dispel the heat fast, more can not play fine tensile effect, and the battery is very easy when the weight impact test explodes on fire and explodes, especially 3500mAh high capacity cylinder type lithium cell like this, and the phenomenon that the weight explodes on fire and explodes when impact test is more serious.
Disclosure of Invention
The invention aims to provide a 3500mAh high-capacity cylindrical lithium battery, and aims to solve the problem that the conventional 3500mAh high-capacity cylindrical lithium battery is easy to ignite and explode to cause potential safety hazards during a heavy hammer impact test.
The 3500mAh high-capacity cylindrical lithium battery comprises a winding core, wherein the winding core comprises a battery cell formed by winding an anode, a diaphragm and a cathode, and an aluminum foil adhesive tape wound around the battery cell by a circle, wherein the tensile strength of the aluminum foil adhesive tape is more than 80N/25 mm.
According to the 3500mAh high-capacity cylindrical lithium battery provided by the invention, the aluminum foil tape is wound on the outermost periphery of the battery core, so that the tensile strength and the high-temperature resistance of the winding core are improved, the impact on the positive and negative electrode plates and the diaphragm under the heavy impact condition can be reduced, and the impact test effect of a battery heavy hammer is improved to a certain extent; and the heat dissipation performance of the winding core is improved, so that the 3500mAh high-capacity cylindrical lithium battery can not change and explode when the heavy hammer is subjected to impact test, and the potential safety hazard of the battery under the condition of extreme impact is reduced.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a 3500mAh high-capacity cylindrical lithium battery which comprises a roll core, wherein the roll core comprises a battery cell formed by winding an anode, a diaphragm and a cathode, and an aluminum foil adhesive tape wound around the battery cell by a circle, wherein the tensile strength of the aluminum foil adhesive tape is more than 80N/25 mm.
According to the 3500mAh high-capacity cylindrical lithium battery provided by the embodiment of the invention, the aluminum foil tape is wound on the outermost periphery of the battery core, so that the tensile strength and the high-temperature resistance of the winding core are improved, the impact on the positive and negative electrode plates and the diaphragm under the heavy impact condition can be reduced, and the impact test effect of a heavy hammer of the battery is improved to a certain extent; and the heat dissipation performance of the winding core is improved, so that the 3500mAh high-capacity cylindrical lithium battery is not easy to change, fire and explode during the heavy hammer impact test, and the potential safety hazard of the battery under the extreme impact condition is reduced. The 3500mAh high-capacity cylindrical lithium battery provided by the invention has the passing rate of a heavy hammer impact test of 100%.
In the embodiment of the invention, the aluminum foil tape is adopted to wind the periphery of the battery cell, so that the safety performance of the battery weight impact test is improved. Specifically, though theoretically, the more the number of winding turns, the thicker the thickness, and the stronger the cell impact resistance. However, in the embodiment of the invention, the aluminum foil tape is wound for only one circle so as to avoid that the aluminum foil tape occupies the original filling space of the positive electrode and the negative electrode, so that the capacity of the battery is reduced, and the premise of a high-capacity battery is lost.
In the embodiment of the invention, the tensile strength of the aluminum foil adhesive tape is more than 80N/25 mm. Only when the tensile strength of the aluminum foil tape is more than 80N/25mm, the passing rate of the battery weight impact test can be effectively ensured.
In an embodiment of the present invention, the aluminum foil tape preferably has a length, width and thickness of 56mm, 60 μm. The length of the aluminum foil adhesive tape is enough to wind the battery cell for a circle, and the aluminum foil adhesive tape is not easy to overlong. The width of the aluminum foil tape can just cover the height of the battery cell, namely the battery cell is completely wrapped, so that the battery cell can be effectively protected against heavy object impact by the aluminum foil tape with higher strength, and the passing rate of a battery heavy object impact test is improved; simultaneously, the width of aluminium foil sticky tape should not be too high, if too high, then surpass the aluminium foil sticky tape of electricity core height can be rolled over electricity core both ends, when rolling over when the electricity core both ends, easily anodal, diaphragm, negative pole contact influence battery performance. The thickness of the aluminum foil tape is 60 μm, so that high capacity and a passing rate of a weight impact test can be ensured.
In the embodiment of the invention, the aluminum foil adhesive tape comprises an aluminum foil layer and an adhesive layer laminated on one surface of the aluminum foil layer, and the aluminum foil adhesive tape is bonded with the outer surface of the battery cell through the adhesive layer. The thickness of the aluminum foil adhesive tape provided by the embodiment of the invention is 60 micrometers, wherein the thicker the aluminum foil is, the thinner the thickness of the adhesive layer is, and the higher the tensile strength is. However, the thickness of the adhesive layer is too thin, the adhesive effect of the aluminum foil tape is greatly reduced, and the winding core cannot be wound. Wherein, preferably, the thickness of the aluminum foil is 42-48 μm, and the thickness of the adhesive layer is 12-18 μm. Most preferably, the thickness of the aluminum foil is 45 μm, and the thickness of the adhesive layer is 15 μm, thereby obtaining the aluminum foil tape having the best adhesion effect and tensile strength of the aluminum foil.
More preferably, the aluminum foil contains 0.2% Mn, 0.15% Si, and 2.0% Cu, based on 100% of the total mass of the aluminum foil. In the aluminum foil with the optimized components, Si and Mn can improve the strength of the aluminum foil, Cu is used for improving the heat dissipation performance of the winding core, and each component meets the specific content requirement, so that the obtained aluminum foil meets the optimal result that the strength is greater than 80N/25 mm.
Further preferably, the material of the adhesive layer is high-polymerization PVDF, the bonding strength of the adhesive layer is 0.8N/25mm, and the melting point is 200-250 ℃. The preferred viscose layer has better flame retardant property besides better adhesive property, and can play a role in flame retardant when the battery is out of control due to heat.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The 3500mAh high-capacity cylindrical lithium battery is characterized by comprising a winding core, wherein the winding core comprises an electric core formed by winding an anode, a diaphragm and a cathode and an aluminum foil adhesive tape wound around the electric core by a circle, the side surface of the electric core is completely coated by the aluminum foil adhesive tape, and the tensile strength of the aluminum foil adhesive tape is more than 80N/25 mm; the aluminum foil adhesive tape comprises an aluminum foil layer and an adhesive layer laminated on one surface of the aluminum foil layer, and the aluminum foil adhesive tape is bonded with the outer surface of the battery cell through the adhesive layer; the aluminum foil contains 0.2% of Mn, 0.15% of Si and 2.0% of Cu, based on 100% of the total mass of the aluminum foil.
2. The 3500mAh high capacity cylindrical lithium battery of claim 1, wherein the aluminum foil tape has a length, width, and thickness of 56mm, 60 μm.
3. The 3500mAh high-capacity cylindrical lithium battery of claim 2, wherein the thickness of the aluminum foil is 42 to 48 μm and the thickness of the adhesive layer is 12 to 18 μm.
4. The 3500mAh high-capacity cylindrical lithium battery of claim 3, wherein the thickness of the aluminum foil is 45 μm and the thickness of the adhesive layer is 15 μm.
5. The 3500mAh high-capacity cylindrical lithium battery as claimed in any one of claims 1 to 4, wherein the adhesive layer is made of high polymerization state PVDF, the bonding strength is 0.8N/25mm, and the melting point is 200-250 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307231.7A CN108242572B (en) | 2017-12-11 | 2017-12-11 | 3500mAh high-capacity cylindrical lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307231.7A CN108242572B (en) | 2017-12-11 | 2017-12-11 | 3500mAh high-capacity cylindrical lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108242572A CN108242572A (en) | 2018-07-03 |
| CN108242572B true CN108242572B (en) | 2020-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711307231.7A Active CN108242572B (en) | 2017-12-11 | 2017-12-11 | 3500mAh high-capacity cylindrical lithium battery |
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| CN (1) | CN108242572B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112234259B (en) * | 2020-01-06 | 2022-04-12 | 蜂巢能源科技有限公司 | Battery cell manufacturing method and lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220526A (en) * | 2011-07-27 | 2011-10-19 | 福建省闽发铝业股份有限公司 | Aluminum alloy material |
| CN102315398A (en) * | 2011-09-29 | 2012-01-11 | 万海电源(烟台)有限公司 | Packaging method of lithium ion battery |
| CN205104572U (en) * | 2015-11-17 | 2016-03-23 | 天津市捷威动力工业有限公司 | Square lithium ion battery of safe soft package |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3834173B2 (en) * | 1999-12-15 | 2006-10-18 | 三菱電機株式会社 | Plate battery |
| CN102602081B (en) * | 2012-03-16 | 2016-03-02 | 菏泽天信新材料科技有限公司 | The plastic-aluminum packaging film of the anti-burn through short circuit of the corrosion-resistant puncture-resistant of lithium battery apparatus and manufacture method thereof |
| CN205335384U (en) * | 2015-10-19 | 2016-06-22 | 东莞市特瑞斯电池科技有限公司 | Square lithium cell electricity core |
| CN106129459A (en) * | 2016-08-17 | 2016-11-16 | 李家敏 | The energy-conservation lithium battery of potential |
-
2017
- 2017-12-11 CN CN201711307231.7A patent/CN108242572B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220526A (en) * | 2011-07-27 | 2011-10-19 | 福建省闽发铝业股份有限公司 | Aluminum alloy material |
| CN102315398A (en) * | 2011-09-29 | 2012-01-11 | 万海电源(烟台)有限公司 | Packaging method of lithium ion battery |
| CN205104572U (en) * | 2015-11-17 | 2016-03-23 | 天津市捷威动力工业有限公司 | Square lithium ion battery of safe soft package |
Non-Patent Citations (1)
| Title |
|---|
| 锂电池胶带 电池终止胶带;苏州茗超电子科技有限公司;《https://chanpin.gongchang.com/show/104456651/》;20170926;第2页 * |
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| CN108242572A (en) | 2018-07-03 |
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