CN107342440A - High-power lithium ion battery cell and manufacturing method thereof - Google Patents
High-power lithium ion battery cell and manufacturing method thereof Download PDFInfo
- Publication number
- CN107342440A CN107342440A CN201710494304.1A CN201710494304A CN107342440A CN 107342440 A CN107342440 A CN 107342440A CN 201710494304 A CN201710494304 A CN 201710494304A CN 107342440 A CN107342440 A CN 107342440A
- Authority
- CN
- China
- Prior art keywords
- cover plate
- lug
- negative
- lithium ion
- ion battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000004804 winding Methods 0.000 claims abstract description 18
- 230000015572 biosynthetic process Effects 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 7
- 239000005030 aluminium foil Substances 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims 1
- 229910052744 lithium Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 238000003698 laser cutting Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 210000005069 ears Anatomy 0.000 description 3
- 230000005405 multipole Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a high-power lithium ion battery cell and a manufacturing method thereof, and the high-power lithium ion battery cell comprises a shell, a full-lug winding core, a first cover plate and a second cover plate, wherein the shell is of a frame structure with openings at two ends; the full-lug winding core comprises a material-carrying lug area, and a positive lug and a negative lug which are arranged on two sides of the material-carrying lug area, the full-lug winding core is arranged inside the shell, and the positive lug and the negative lug are respectively connected with the first wiring terminal and the second wiring terminal. The invention does not need the laser cutting process of the positive and negative pole pieces, thus greatly improving the efficiency; the full-lug winding core is provided with a wider positive lug and a wider negative lug, and is reinforced by overcurrent; first apron utmost point post, second apron utmost point post are bigger with first binding post, second binding post area of contact respectively, more are applicable to high multiplying power type electricity core.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly to a kind of high-power lithium ion battery core and its making side
Method.
Background technology
At present, lithium ion battery is quickly grown, and application is more and more wider, especially in electric automobile field.Market for
The demand of electric automobile is growing, especially in field of hybrid electric vehicles.Hybrid vehicle needs lithium-ion electric core to have
Higher power-performance, at present such high power battery core mainly have two kinds of techniques, be respectively：1st, it is stacked, by positive plate-every
The plurality of earphone battery core that the mode of film-negative plate alternately superposition is realized, the technique exist producing efficiency is low, the difficult control of burr, pole piece
The problems such as easily misplacing；2nd, multi pole ears winding process, winding needs that positive/negative plate progress spacing laser is cut to obtain lug before, then leads to
Cross up- coiler to be wound pole piece, alignment lug obtains multi pole ears core, and this method has efficiency during lug laser is cut
Relatively low, the difficult control of burr, scrap the problems such as serious；In addition, power battery core made from current multi pole ears technique is still deposited
Cause the not high phenomenon of power-performance in lug and cover plate conveyance capacity deficiency.
The content of the invention
Based on technical problem present in background technology, the present invention proposes a kind of high-power lithium ion battery core and its making
Method.
The present invention also proposes a kind of preparation method of high-power lithium ion battery core, comprises the following steps：
S1, positive pole sheet stock formation positive plate is coated on aluminium foil, and the aluminium foil formation positive pole that blanked in advance on positive plate one side
Lug；
S2, negative pole sheet stock formation negative plate is coated on copper foil, and the copper foil formation negative pole that blanked in advance on negative plate one side
Lug；
S3, volume pin pre-roll half-turn barrier film, enter negative plate, the circle of winding one, enter positive plate, and cause positive pole ear, negative pole pole
Ear is located at the both sides of barrier film respectively, and then continuous winding, after winding pre- fixing turn, while cuts off positive plate, negative plate and barrier film,
Volume pin, core hot pressing are extracted, winding is completed, and obtains full lug core；
S4, routinely carry out full lug core bag bottom tape；
S5, full lug core integrally load in housing；
S6, the first cover plate, the second cover plate be separately mounted at housing both ends open, positive pole ear negative lug is distinguished
Neat peace is clipped in the first cover plate, two the first flexible links of the second cover plate, among two the second flexible links, and passes through ultrasound
Welding links together positive pole ear, negative lug with the first flexible link, the second flexible link respectively；
S7, by ultra-sonic welded the first cover plate, the second cover plate are connected with housing both ends open respectively, housing both ends are opened
Mouth is sealed.
Preferably, it is two separated semiellipse cylinders pin to be rolled up in S3.
The present invention also proposes a kind of high-power lithium ion battery core produced using above-mentioned preparation method, including housing, complete
Lug core, the first cover plate and the second cover plate, housing be both ends open frame structure, the first cover plate, the second cover plate respectively with
Housing both ends open is in mating connection to be sealed to housing, and the first terminals are respectively equipped with the outside of the first cover plate, the second cover plate
Son, the second binding post；Full lug core includes strip pole piece area and the positive pole ear for being arranged on strip pole piece area both sides, born
Pole lug, full lug core is arranged on enclosure interior, and positive pole ear, negative lug connect with the first binding post, second respectively
Line terminals connect.
Preferably, be provided with two the first flexible links on the inside of the first cover plate, two the first flexible links by Laser Welding and
First cover plate pole is connected, and the first cover plate pole is connected by more Liu Ding with the first binding post；Neatly peace is clipped in positive pole ear
It is connected between two the first flexible links and by ultra-sonic welded with two the first flexible links.
Preferably, two the first flexible links are aluminium flake.
Preferably, be provided with two the second flexible links on the inside of the second cover plate, two the second flexible links by Laser Welding and
Second cover plate pole is connected, and the second cover plate pole is connected by more Liu Ding with the second binding post；Neatly peace is clipped in negative lug
The part of two the second flexible links is simultaneously connected by ultra-sonic welded with two the second flexible links.
Preferably, two the second flexible links are copper sheet.
Preferably, the first cover plate is provided with liquid injection port and explosion-proof valve.
Preferably, the first cover plate, the second cover plate are tightly connected by laser welding and housing both ends open respectively.
High-power lithium ion battery core proposed by the present invention, it is not necessary to which, by the laser cutting process of positive/negative plate, efficiency is significantly
Improve；Full lug core has broader positive pole ear, negative lug, and positive pole ear, negative lug are located at full pole respectively
The both sides of ear core, excessively stream are strengthened；First cover plate pole, the second cover plate pole respectively by more Liu Ding and the first binding post,
Second binding post connect so that the first cover plate pole, the second cover plate pole respectively with the first binding post, the second binding post
Contact area is bigger, is more suitable for high-rate type battery core.
Brief description of the drawings
Fig. 1 is a kind of preparation method schematic flow sheet of high-power lithium ion battery core proposed by the present invention；
Fig. 2 is a kind of structural representation of high-power lithium ion battery core proposed by the present invention；
Fig. 3 is full lug core structural representation in a kind of high-power lithium ion battery core proposed by the present invention；
Fig. 4 is the structural representation of the first cover plate in a kind of high-power lithium ion battery core proposed by the present invention；
Fig. 5 is the structural representation of the second cover plate in a kind of high-power lithium ion battery core proposed by the present invention.
Embodiment
Reference picture 1, the present invention propose a kind of preparation method of high-power lithium ion battery core, comprised the following steps：
S1, positive pole sheet stock formation positive plate is coated on aluminium foil, and the aluminium foil formation positive pole that blanked in advance on positive plate one side
Lug 7；
S2, negative pole sheet stock formation negative plate is coated on copper foil, and the copper foil formation negative pole that blanked in advance on negative plate one side
Lug 8；
S3, volume pin pre-roll half-turn barrier film, enter negative plate, the circle of winding one, enter positive plate, and cause positive pole ear 7, negative pole pole
Ear 8 is located at the both sides of barrier film respectively, then continuous winding, after winding pre- fixing turn, while cut off positive plate, negative plate and every
Film, volume pin, core hot pressing are extracted, winding is completed, and obtains full lug core 2；
S4, routinely carry out the full bag bottom tape of lug core 2；
S5, full lug core 2 are overall to be loaded in housing 1；
S6, the first cover plate 3, the second cover plate 4 be separately mounted at the both ends open of housing 1, by positive pole ear 7, negative pole pole
Neat peace is clipped in two the first flexible links, 9, two the second flexible links 10 of the first cover plate 3, the second cover plate 4 ear 8 respectively
Between, and be connected positive pole ear 7, negative lug 8 with the first flexible link 9, the second flexible link 10 respectively by ultra-sonic welded
Together；
S7, by ultra-sonic welded the first cover plate 3, the second cover plate 4 are connected with the both ends open of housing 1 respectively, to 1 liang of housing
End opening is sealed；Before welding, it is ensured that the first cover plate 3, the second cover plate 4 is smooth is fastened into housing 1, contacts at gap, nothing
Opening, no dust, prevent that welding process weldering is quick-fried.
In the present embodiment, it is two separated semiellipse cylinders pin to be rolled up in S3.
Reference picture 2- Fig. 5, a kind of high-power lithium ion battery core produced using above-mentioned preparation method, including it is housing 1, complete
Lug core 2, the first cover plate 3 and the second cover plate 4, wherein：
Housing 1 is the frame structure of both ends open, and the first cover plate 3, the second cover plate 4 pass through laser welding and housing 1 respectively
Both ends open is tightly connected, and the first cover plate 3, the outside of the second cover plate 4 are respectively equipped with the first binding post 5, the second binding post 6.
First cover plate 3 is provided with liquid injection port 11 and explosion-proof valve 12, and the inner side of the first cover plate 3 is provided with two the first flexible links 9, two first
Flexible link 9 is connected by Laser Welding with the first cover plate pole, and the first cover plate pole is connected by more Liu Ding and the first binding post 5
Connect.The inner side of second cover plate 4 is provided with two the second flexible links 10, and two the second flexible links 10 pass through Laser Welding and the second cover plate
Pole is connected, and the second cover plate pole is connected by more Liu Ding with the second binding post 6.
Full lug core 2 includes strip pole piece area and is arranged on the positive pole ear 7 of strip pole piece area both sides, negative lug
8, full lug core 2 is arranged on inside housing 1, and neatly peace is clipped between two the first flexible links 9 and by super positive pole ear 7
Sonic soldering connects to be connected with two the first flexible links 9, and neatly peace is clipped in the part of two the second flexible links 10 and passed through negative lug 8
Ultra-sonic welded is connected with two the second flexible links 10.
In the present embodiment, two the first flexible links 9 are aluminium flake, and two the second flexible links 10 are copper sheet.
A kind of high-power lithium ion battery core proposed by the present invention, it is not necessary to by the laser cutting process of positive/negative plate, efficiency
Greatly improve, effectively reduce scrapping for pole piece；Full lug core 2 has broader positive pole ear 7, negative lug 8, and positive pole
Lug 7, negative lug 8 are located at the both sides of full lug core 2 respectively, and conveyance capacity is more preferably；First cover plate pole, the second cover plate pole
Post is connected by more Liu Ding with the first binding post 5, the second binding post 6 respectively so that the first cover plate pole, the second cover plate pole
Post is bigger with the first binding post 5, the contact area of the second binding post 6 respectively, is more suitable for high-rate type battery core.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (9)
1. a kind of preparation method of high-power lithium ion battery core, it is characterised in that comprise the following steps：
S1, positive pole sheet stock formation positive plate is coated on aluminium foil, and the aluminium foil formation positive pole ear that blanked in advance on positive plate one side
(7)；
S2, negative pole sheet stock formation negative plate is coated on copper foil, and the copper foil formation negative lug that blanked in advance on negative plate one side
(8)；
S3, volume pin pre-roll half-turn barrier film, enter negative plate, the circle of winding one, enter positive plate, and cause positive pole ear (7), negative lug
(8) be located at the both sides of barrier film respectively, then continuous winding, after winding pre- fixing turn, while cut off positive plate, negative plate and every
Film, volume pin, core hot pressing are extracted, winding is completed, and obtains full lug core (2)；
S4, routinely carry out full lug core (2) bag bottom tape；
S5, full lug core (2) integrally load in housing (1)；
S6, the first cover plate (3), the second cover plate (4) be separately mounted at housing (1) both ends open, by positive pole ear (7), negative
Pole lug (8) respectively neat peace be clipped in the first cover plate (3), two the first flexible links (9) of the second cover plate (4), two second
Among flexible link (10), and by ultra-sonic welded by positive pole ear (7), negative lug (8) respectively with the first flexible link
(9), the second flexible link (10) links together；
S7, by ultra-sonic welded the first cover plate (3), the second cover plate (4) are connected with housing (1) both ends open respectively, to housing
(1) both ends open is sealed.
2. the preparation method of high-power lithium ion battery core according to claim 1, it is characterised in that it is two that pin is rolled up in S3
Individual separated semiellipse cylinder.
3. the high-power lithium that a kind of preparation method of high-power lithium ion battery core using described in claim 1 or 2 is produced from
Sub- battery core, it is characterised in that including housing (1), full lug core (2), the first cover plate (3) and the second cover plate (4), housing (1)
It is in mating connection right with housing (1) both ends open respectively for the frame structure of both ends open, the first cover plate (3), the second cover plate (4)
Housing (1) is sealed, and the first binding post (5), the second terminals are respectively equipped with the outside of the first cover plate (3), the second cover plate (4)
Sub (6)；Full lug core (2) includes strip pole piece area and is arranged on the positive pole ear (7) of strip pole piece area both sides, negative pole pole
Ear (8), it is internal that full lug core (2) is arranged on housing (1), and positive pole ear (7), negative lug (8) respectively with the first wiring
Terminal (5), the second binding post (6) connection.
4. high-power lithium ion battery core according to claim 3, it is characterised in that two are provided with the inside of the first cover plate (3)
First flexible link (9), two the first flexible links (9) are connected by Laser Welding with the first cover plate pole, first lid (3) pole
It is connected by more Liu Ding with the first binding post (5)；Neatly peace is clipped between two the first flexible links (9) positive pole ear (7)
And it is connected by ultra-sonic welded with two the first flexible links (9).
5. high-power lithium ion battery core according to claim 4, it is characterised in that two the first flexible links (9) are
Aluminium flake.
6. the high-power lithium ion battery core according to any one of claim 3-5, it is characterised in that in the second cover plate (4)
Side is provided with two the second flexible links (10), and two the second flexible links (10) are connected by Laser Welding with the second cover plate pole,
Second cover plate pole is connected by more Liu Ding with the second binding post (6)；Neatly peace is clipped in two the second soft companies to negative lug (8)
The part of fitting (10) is simultaneously connected by ultra-sonic welded with two the second flexible links (10).
7. high-power lithium ion battery core according to claim 6, it is characterised in that two the second flexible links (10) are
Copper sheet.
8. the high-power lithium ion battery core according to any one of claim 3-5, it is characterised in that on the first cover plate (3)
Provided with liquid injection port (11) and explosion-proof valve (12).
9. the high-power lithium ion battery core according to any one of claim 3-5, it is characterised in that the first cover plate (3),
Two cover plates (4) are tightly connected by laser welding and housing (1) both ends open respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710494304.1A CN107342440A (en) | 2017-06-26 | 2017-06-26 | High-power lithium ion battery cell and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710494304.1A CN107342440A (en) | 2017-06-26 | 2017-06-26 | High-power lithium ion battery cell and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107342440A true CN107342440A (en) | 2017-11-10 |
Family
ID=60220828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710494304.1A Pending CN107342440A (en) | 2017-06-26 | 2017-06-26 | High-power lithium ion battery cell and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107342440A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709530A (en) * | 2022-04-20 | 2022-07-05 | 广东国光电子有限公司 | Soft-packaged full-lug cylindrical battery core |
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| CN102447093A (en) * | 2011-12-23 | 2012-05-09 | 天津力神电池股份有限公司 | Lithium ion battery |
| CN202308190U (en) * | 2011-08-18 | 2012-07-04 | 合肥国轩高科动力能源有限公司 | Novel utmost point ear high magnification lithium ion battery |
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| CN105186046A (en) * | 2015-08-22 | 2015-12-23 | 江苏海四达电源股份有限公司 | Multi-tab rolling cores and cover board connecting mode of lithium-ion battery |
| CN105742721A (en) * | 2016-04-27 | 2016-07-06 | 国轩新能源（苏州）有限公司 | High-energy-ratio low-internal-resistance cylindrical lithium ion battery |
| CN205666257U (en) * | 2016-05-27 | 2016-10-26 | 杜福宙 | Utmost point post riveting flexible connecting piece's lithium ion battery cover plate |
-
2017
- 2017-06-26 CN CN201710494304.1A patent/CN107342440A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931101A (en) * | 2009-06-25 | 2010-12-29 | 天津市捷威动力工业有限公司 | Lithium-ion power battery and manufacturing method thereof |
| CN101604766A (en) * | 2009-07-29 | 2009-12-16 | 吉安市优特利科技有限公司 | Tab structure of lithium ion power battery |
| CN202308190U (en) * | 2011-08-18 | 2012-07-04 | 合肥国轩高科动力能源有限公司 | Novel utmost point ear high magnification lithium ion battery |
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| CN203406360U (en) * | 2013-06-24 | 2014-01-22 | 浙江南都电源动力股份有限公司 | Cover plate structure for square aluminium-shell lithium ion battery |
| CN103779528A (en) * | 2014-01-15 | 2014-05-07 | 合肥国轩高科动力能源股份公司 | Assembly process of cylindrical lithium-ion cell |
| CN203983347U (en) * | 2014-05-30 | 2014-12-03 | 合肥国轩高科动力能源股份公司 | Be applicable to the lithium ion rectangular cell cover plate that both sides go out lug |
| CN105186046A (en) * | 2015-08-22 | 2015-12-23 | 江苏海四达电源股份有限公司 | Multi-tab rolling cores and cover board connecting mode of lithium-ion battery |
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| CN205666257U (en) * | 2016-05-27 | 2016-10-26 | 杜福宙 | Utmost point post riveting flexible connecting piece's lithium ion battery cover plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709530A (en) * | 2022-04-20 | 2022-07-05 | 广东国光电子有限公司 | Soft-packaged full-lug cylindrical battery core |
| CN114709530B (en) * | 2022-04-20 | 2023-07-21 | 广东国光电子有限公司 | Soft-package full-lug cylindrical battery cell |
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Application publication date: 20171110 |