CN105742527A - Cylindrical lithium ion power battery with high energy ratio and long service lifetime - Google Patents
Cylindrical lithium ion power battery with high energy ratio and long service lifetime Download PDFInfo
- Publication number
- CN105742527A CN105742527A CN201610156455.1A CN201610156455A CN105742527A CN 105742527 A CN105742527 A CN 105742527A CN 201610156455 A CN201610156455 A CN 201610156455A CN 105742527 A CN105742527 A CN 105742527A
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- Prior art keywords
- lithium ion
- coating
- cylindrical lithium
- positive
- high energy
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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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/183—Sealing members
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a cylindrical lithium ion power battery with high energy ratio and long service lifetime. The height-diameter ratio of the cylindrical lithium ion power battery is 3.8-4.2. A battery core of the cylindrical lithium ion power battery comprises a positive coating, a positive tab, a negative coating, a negative tab and a diaphragm, wherein the diaphragm is arranged between a positive electrode and a negative electrode, the negative coating is wider than the positive coating and asymmetrically coats the positive coating, the distance, exceeding the front end of the positive coating, of the negative coating at a positive end is smaller than the distance, exceeding the front end of the positive coating, of the negative coating at a negative end, the battery core is accommodated in a closed space formed by an aluminum shell and a cover plate, the cover plate is sealed by dual rivets, the cover plate is provided with a groove at a position where pole posts are riveted, the groove is used for filling an insulation material at a riveting position, and a bevel angle is formed on the end surface of the aluminum shell. The invention provides the cylindrical lithium ion power battery with high energy ratio and long service lifetime, the capacity of a single battery is improved, meanwhile, the safety of the battery is considered; and the riveting mode of the cover plate and the end surface processing technique of the aluminum shell are optimized, the processing difficulty of the battery is reduced, and the production efficiency is improved.
Description
Technical field
The invention belongs to technical field of lithium batteries, particularly relate to a kind of high energy ratio, long-life cylindrical lithium ion electrokinetic cell.
Background technology
Along with country to the support of new-energy automobile industry and popularization, market is also increasing to the demand of lithium battery, and capacity and life-span to lithium ion battery it is also proposed higher requirement.Cylindrical lithium ion battery has high filling rate relative to rectangular lithium ion battery, thus there is the feature of high energy ratio, and 18650 traditional batteries, owing to its capacity is low, the number of batteries that bicycle needs is huge, production capacity cannot meet far away the demand in market, and BMS controls system complex, and potential safety hazard is big.On the other hand, the mode of traditional cylindrical lithium ion battery many employings ultrasonic spot welding comes soldering polar ear, lug negligible amounts, and battery area of passage is limited, causes the internal resistance of cell bigger than normal, affects the cycle life of battery.Therefore, exploitation a kind of high energy ratio, long-life cylindrical lithium ion electrokinetic cell it are badly in need of.
Summary of the invention
In view of the defect that above-mentioned prior art exists, the purpose of the present invention is to propose to a kind of high energy ratio, long-life cylindrical lithium ion electrokinetic cell.
The purpose of the present invention will be achieved by the following technical programs:
A kind of high energy ratio, long-life cylindrical lithium ion electrokinetic cell, the ratio of height to diameter of described cylindrical lithium ion electrokinetic cell is 3.8～4.2；The battery core of described cylindrical lithium ion electrokinetic cell includes positive electrode coating and positive pole ear, negative pole coating and negative lug, and the barrier film between both positive and negative polarity, described negative pole coating is wider than described positive electrode coating and asymmetric envelopes described positive electrode coating, described negative pole coating at positive terminal beyond the distance of described positive electrode coating front end less than described negative pole coating in the negative pole end distance beyond described positive electrode coating front end；Described battery core is contained in the closing space being made up of aluminum hull and cover plate, and described cover plate adopts double; two rivet to seal, and described cover plate is provided with for the groove at riveted place fill insulant at pole riveted place, and the end of described aluminum hull offers chamfering.
Further, the diameter of described cylindrical lithium ion electrokinetic cell is 32mm, is highly 131mm.
Further, described aluminum hull has the chamfering of 3 °～15 ° in port.
Further, the described groove of promising diameter 1.2～1.6 times offered by described cover plate at pole riveted place.
Further, the employing of described negative pole coating is rubbed flat welded technique winding and is coated on the outside of described positive electrode coating.The prominent effect of the present invention is: the invention provides a kind of high energy ratio, long-life cylindrical lithium ion electrokinetic cell, the safety of battery has been taken into account while improve the capacity of cell, optimize the end face processing technique of the riveting method of cover plate, aluminum hull simultaneously, reduce the difficulty of processing of battery, improve production efficiency.
Hereinafter just accompanying drawing in conjunction with the embodiments, is described in further detail the specific embodiment of the present invention, so that technical solution of the present invention is more readily understood, grasps.
Accompanying drawing explanation
Fig. 1 is the contour structures schematic diagram of the embodiment of the present invention；
Fig. 2 is the battery core pole piece structure schematic diagram of the embodiment of the present invention；
Fig. 3 is the covering plate structure schematic diagram of the embodiment of the present invention；
Fig. 4 is the aluminum hull structural representation of the embodiment of the present invention.
Detailed description of the invention
Embodiment
As Figure 1-4, a kind of high energy ratio of the present embodiment, long-life cylindrical lithium ion electrokinetic cell, the ratio of height to diameter of cylindrical lithium ion electrokinetic cell is 3.8～4.2.Preferably, the diameter of cylindrical lithium ion electrokinetic cell is 32mm, is highly 131mm, and battery size is relatively big, and cell capacity is high, has played the feature of cylinder high energy ratio.
The battery core of cylindrical lithium ion electrokinetic cell includes positive electrode coating 4 and positive pole ear 10, negative pole coating 5 and negative lug 11, and the barrier film 9 between both positive and negative polarity, negative pole coating 5 is wider than positive electrode coating 4 and asymmetric envelopes positive electrode coating 4, negative pole coating 5 exceeds the distance of positive electrode coating 4 front end at positive terminal and exceeds the distance of positive electrode coating 4 front end less than negative pole coating 5 at negative pole end, and positive pole, negative pole and barrier film three are wound into cylindrical structural.The benefit adopting negative pole coating 5 this structure of asymmetric clad anode coating 4 is to increase the negative pole end distance to positive terminal on the one hand, reduce battery core in rubbing flat welded it may happen that the risk of short circuit, on the other hand, it is finer and close that positive pole can be rubbed, ensure that the fastness of follow-up welding, battery core conveyance capacity is strong.
Battery core is contained in the closing space being made up of aluminum hull 1 and cover plate 2, and cover plate 2 adopts double; two rivet 6 to seal, it is to avoid single rivet rotational problems in driving vibrations；Cover plate 2 is provided with at pole 3 riveted place for the groove 7 for diameter 1.2～1.6 times at riveted place fill insulant, makes insulation filler more at the loading of riveted joint place, and riveting intensity is bigger, reduces the ratio of battery leakage, better tightness.
The end of aluminum hull 1 offers the chamfering 8 of 3 °～15 °, makes welding fluid more readily flow into weld seam in welding battery process, and welding efficiency is higher, reduces quick-fried some ratio of peripheral weld, improves soldering reliability.
Present embodiments provide a kind of high energy ratio, long-life cylindrical lithium ion electrokinetic cell, the safety of battery has been taken into account while improve the capacity of cell, optimize the end face processing technique of the riveting method of cover plate 2, aluminum hull 1 simultaneously, reduce the difficulty of processing of battery, improve production efficiency.
The present invention still has numerous embodiments, all employing equivalents or equivalent transformation and all technical schemes of being formed, all falls within protection scope of the present invention.
Claims (5)
1. a high energy ratio, long-life cylindrical lithium ion electrokinetic cell, it is characterised in that: the ratio of height to diameter of described cylindrical lithium ion electrokinetic cell is 3.8～4.2；The battery core of described cylindrical lithium ion electrokinetic cell includes positive electrode coating and positive pole ear, negative pole coating and negative lug, and the barrier film between both positive and negative polarity, described negative pole coating is wider than described positive electrode coating and asymmetric envelopes described positive electrode coating, described negative pole coating at positive terminal beyond the distance of described positive electrode coating front end less than described negative pole coating in the negative pole end distance beyond described positive electrode coating front end；Described battery core is contained in the closing space being made up of aluminum hull and cover plate, and described cover plate adopts double; two rivet to seal, and described cover plate is provided with for the groove at riveted place fill insulant at pole riveted place, and the end of described aluminum hull offers chamfering.
2. a kind of high energy ratio, long-life cylindrical lithium ion electrokinetic cell according to claim 1, it is characterised in that: the diameter of described cylindrical lithium ion electrokinetic cell is 32mm, is highly 131mm.
3. a kind of high energy ratio, long-life cylindrical lithium ion electrokinetic cell according to claim 1, it is characterised in that: described aluminum hull has the chamfering of 3 °～15 ° in port.
4. a kind of high energy ratio, long-life cylindrical lithium ion electrokinetic cell according to claim 1, it is characterised in that: described cover plate offers the described groove of promising diameter 1.2～1.6 times at pole riveted place.
5. a kind of high energy ratio, long-life cylindrical lithium ion electrokinetic cell according to claim 1, it is characterised in that: the employing of described negative pole coating is rubbed flat welded technique winding and is coated on the outside of described positive electrode coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610156455.1A CN105742527B (en) | 2016-03-18 | 2016-03-18 | A kind of cylindrical lithium ion power battery of high energy than, long-life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610156455.1A CN105742527B (en) | 2016-03-18 | 2016-03-18 | A kind of cylindrical lithium ion power battery of high energy than, long-life |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105742527A true CN105742527A (en) | 2016-07-06 |
| CN105742527B CN105742527B (en) | 2018-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610156455.1A Active CN105742527B (en) | 2016-03-18 | 2016-03-18 | A kind of cylindrical lithium ion power battery of high energy than, long-life |
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| CN (1) | CN105742527B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410079A (en) * | 2016-09-12 | 2017-02-15 | 国轩新能源（苏州）有限公司 | Cylindrical lithium-ion power battery aluminum shell with high safety and high performance |
| CN108281578A (en) * | 2017-12-07 | 2018-07-13 | 国轩新能源（苏州）有限公司 | Cylindrical battery vibration proof type electric lids |
| CN110828714A (en) * | 2019-11-20 | 2020-02-21 | 四川新敏雅电池科技有限公司 | Shell for lithium ion cell and preparation method thereof, and lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101312236A (en) * | 2007-05-22 | 2008-11-26 | 日立车辆能源株式会社 | Lithium-ion secondary battery |
| CN101517787A (en) * | 2006-09-19 | 2009-08-26 | 松下电器产业株式会社 | Method of producing electrode for secondary battery, and secondary battery |
| CN203812931U (en) * | 2014-04-24 | 2014-09-03 | 合肥国轩高科动力能源股份公司 | Lithium ion battery cover plate |
-
2016
- 2016-03-18 CN CN201610156455.1A patent/CN105742527B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517787A (en) * | 2006-09-19 | 2009-08-26 | 松下电器产业株式会社 | Method of producing electrode for secondary battery, and secondary battery |
| CN101312236A (en) * | 2007-05-22 | 2008-11-26 | 日立车辆能源株式会社 | Lithium-ion secondary battery |
| CN203812931U (en) * | 2014-04-24 | 2014-09-03 | 合肥国轩高科动力能源股份公司 | Lithium ion battery cover plate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410079A (en) * | 2016-09-12 | 2017-02-15 | 国轩新能源（苏州）有限公司 | Cylindrical lithium-ion power battery aluminum shell with high safety and high performance |
| CN108281578A (en) * | 2017-12-07 | 2018-07-13 | 国轩新能源（苏州）有限公司 | Cylindrical battery vibration proof type electric lids |
| CN108281578B (en) * | 2017-12-07 | 2021-06-01 | 国轩新能源（苏州）有限公司 | Cylindrical battery vibration-proof electrode cover plate |
| CN110828714A (en) * | 2019-11-20 | 2020-02-21 | 四川新敏雅电池科技有限公司 | Shell for lithium ion cell and preparation method thereof, and lithium ion battery |
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| Publication number | Publication date |
|---|---|
| CN105742527B (en) | 2018-10-16 |
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Address after: No.100 Yuanfeng Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Shanghai Electric GuoXuan new energy technology (Suzhou) Co.,Ltd. Address before: No.100 Yuanfeng Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: GUOXUAN NEW ENERGY (SUZHOU) Co.,Ltd. |
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Effective date of registration: 20211201 Address after: 226000 No.98 Hexing East Road, Nantong Development Zone, Jiangsu Province Patentee after: Shanghai Electric GuoXuan new energy technology (Nantong) Co.,Ltd. Patentee after: Shanghai Electric GuoXuan New Energy Technology Co., Ltd Address before: No.100 Yuanfeng Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: Shanghai Electric GuoXuan new energy technology (Suzhou) Co.,Ltd. |