CN111900484B - Quadrupole ear soft-package battery cell and manufacturing method and application thereof - Google Patents
Quadrupole ear soft-package battery cell and manufacturing method and application thereof Download PDFInfo
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- CN111900484B CN111900484B CN202010720069.7A CN202010720069A CN111900484B CN 111900484 B CN111900484 B CN 111900484B CN 202010720069 A CN202010720069 A CN 202010720069A CN 111900484 B CN111900484 B CN 111900484B
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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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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- 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
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a quadrupole ear soft-package battery cell and a manufacturing method and application thereof, wherein the battery cell comprises an aluminum plastic film and a battery cell body arranged in the aluminum plastic film, the battery cell body adopts a diaphragm to wrap a pole piece, and diaphragm lugs are arranged at two ends of the diaphragm to be used as test lugs, so that the diaphragm breakdown voltage is measured in situ on the premise of not influencing the internal structure of the battery cell.
Description
Technical Field
The invention belongs to the technical field of lithium ion battery detection, and particularly relates to a quadrupole ear soft-package battery cell and a manufacturing method and application thereof.
Background
With the increasing demand for environment, the use of toxic metals such as lead and cadmium is increasingly restricted, and therefore, new rechargeable batteries which can replace the traditional lead-acid batteries and nickel-cadmium batteries are required to be found. Lithium ion secondary batteries naturally become one of the promising candidates because of their advantages of high operating voltage, large energy density (light weight), low self-discharge rate, no memory effect, long cycle life, no pollution, etc. In the research and development process of the lithium ion battery, a large number of raw materials are involved, such as anode and cathode materials, a diaphragm, an insulating film, electrolyte, an aluminum shell, a cover plate and the like, each material has a large number of performance indexes, and the breakdown voltage of the diaphragm is one of the performance indexes. The short circuit of the battery core after the partial capacity is caused by the breakdown of the diaphragm, if the diaphragm can still keep good electric resistance in the use of the battery, the risk of the short circuit of the battery can be reduced, and therefore, the measurement of the breakdown voltage of the diaphragm has important guiding significance for the production of the diaphragm.
At present, the breakdown voltage of the diaphragm is mainly obtained by independently measuring the diaphragm, in fact, the diaphragm is made into a roll core, after electrolyte is injected, ions penetrate back and forth, the electric strength of the diaphragm and a pure diaphragm are changed, the surface of a pole piece is not smooth, the phenomenon of point discharge also exists, if the electric strength of the diaphragm is greatly reduced, a battery cell is directly failed, and therefore the change of the breakdown voltage is closely related to the safety performance of the battery cell in the process of injecting the diaphragm into the partial capacitance of the battery cell. The existing measuring method is relatively rough, the electric core is required to be disassembled for measurement, manpower and material resources are wasted, and the measuring result can generate deviation due to the contact of the diaphragm and air.
Disclosure of Invention
In view of the above, the present invention is to provide a quadrupole ear soft-package cell, a manufacturing method thereof and an application thereof, in which the cell can directly measure the breakdown voltage of a diaphragm in the processes of winding a core, assembling, injecting liquid, forming, aging, grading, etc. without disassembling the cell, the measuring method is safe and convenient, and the measurement result is accurate, so as to solve the above-mentioned problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a quadrupole ear soft-package battery cell, which comprises:
the battery cell comprises a battery cell body, wherein the battery cell body comprises a diaphragm, a negative plate and a positive plate, the diaphragm is sequentially arranged in parallel, the negative plate is provided with a negative electrode tab at the side edge, and the positive plate is provided with a positive electrode tab at the side edge; the two opposite side edges of the diaphragm are respectively provided with diaphragm tabs, and the side edge where the diaphragm tabs are located is adjacent to the side edge where the positive electrode tab and the negative electrode tab are located;
the inside plastic-aluminum membrane that has the holding chamber, electric core body arranges in the holding intracavity, the holding intracavity is annotated there is electrolyte, the messenger is seted up to the side of plastic-aluminum membrane the export that anodal utmost point ear, negative pole utmost point ear and diaphragm utmost point ear run through.
Further, the length of the diaphragm exceeds the width of the negative electrode piece by more than 54 mm.
Furthermore, the connecting part of the diaphragm tab and the diaphragm is divided into an upper piece and a lower piece.
Furthermore, the aluminum-plastic film is two pieces, and the length of the aluminum-plastic film is 300mm, and the width of the aluminum-plastic film is 160 mm;
the diaphragm is 150mm long and 131mm wide;
the size of the negative plate is 126mm in length and 96mm in width;
the size of the positive plate is 123mm in length and 93mm in width;
the sizes of the positive electrode lug and the negative electrode lug are 28mm in width and 26mm in height, and the distance between the positive electrode lug and the negative electrode lug and the edge of the corresponding pole piece is 8 mm.
Furthermore, the number of the diaphragms is 10, the number of the negative electrode plates is 9, and the number of the positive electrode plates is 8.
The invention also provides a manufacturing method of the quadrupole ear soft-package battery cell, which comprises the following steps:
sequentially stacking the cut diaphragm, the negative plate and the positive plate in sequence and then carrying out hot pressing;
welding a diaphragm tab to obtain a cell body;
placing the cell body in an accommodating cavity formed by two aluminum-plastic films, respectively penetrating a positive electrode lug, a negative electrode lug and a diaphragm lug through corresponding outlets on the aluminum-plastic films, and baking after heat sealing the side edge of the aluminum-plastic film where the lug is located until the moisture content is less than 500 ppm;
injecting electrolyte into the aluminum plastic film from the side edge which is not subjected to heat sealing, and then carrying out heat sealing;
and after the sealed soft-packaged battery cell is formed, aged and sealed for two times, discharging gas and residual electrolyte in the soft-packaged battery cell, and cutting off redundant aluminum-plastic films to obtain the quadrupole ear soft-packaged battery cell.
The invention also provides application of the quadrupole ear soft-package battery core in testing the breakdown voltage of the diaphragm.
Specifically, the application of the quadrupole ear soft-package battery core in testing the breakdown voltage of the diaphragm comprises the following steps:
before the formation of the battery cell, applying a force of 20N-30N to the battery cell by using an insulating plate, and connecting a tester with a diaphragm tab for testing, wherein the design initial voltage is 100V-1000V, the termination voltage is 2000V, the step voltage is 50V-100V, the charging time is 500ms, and the interval time is 500 ms;
after the battery cell is formed, after a diaphragm electrode is glued by an insulating adhesive tape, a diaphragm lug is cleaned, an insulating plate is used for applying a force of 20N-30N to lightly press the battery cell, a tester is connected with the diaphragm lug for testing, the initial voltage is 50V-300V, the final voltage is 2000V, the step voltage is 10-30V, the charging time is 500ms, and the interval time is 500 ms;
further, the step of cleaning the diaphragm tab specifically comprises: and cleaning the diaphragm tab by adopting alcohol.
The quadrupole ear soft-packed battery core adopts the structure that the pole piece is wrapped outside the diaphragm, the diaphragm pole lugs are reserved on two sides of the diaphragm, and the diaphragm pole lugs are used as the test pole lugs, so that the breakdown voltage can be tested at any time under the condition that the battery core is not disassembled and the internal structure of the battery core is not influenced, the in-situ measurement of the breakdown voltage of the diaphragm is realized, the accuracy of the measurement result is high, the measurement cost is low, data support is provided for the production of the high-power-resistance diaphragm and the identification of the diaphragm, and meanwhile, the blank of the breakdown voltage.
Drawings
Fig. 1 is a schematic structural diagram of a negative plate 20 in a four-tab soft-package battery cell according to a preferred embodiment of the invention;
fig. 2 is a schematic structural diagram of the positive plate 30 in the quadrupole ear soft-pack electric core in the preferred embodiment of the present invention;
fig. 3 is a schematic structural diagram of a membrane 10 in a quadrupole ear soft-pack cell according to a preferred embodiment of the present invention;
fig. 4 is a connection side view of the diaphragm tab 101;
fig. 5 is a schematic view of an overall structure of a four-tab soft-package battery cell in a preferred embodiment of the invention.
In the figure: 10-diaphragm, 20-negative pole piece, 30-positive pole piece, 40-aluminum plastic film, 101-diaphragm tab, 201-negative pole tab and 301-positive pole tab.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the specific embodiments illustrated. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The embodiment of the invention firstly discloses a quadrupole ear soft-package battery core, the structure of which is shown in fig. 5, and the battery core comprises a battery core body, the battery core body is composed of a diaphragm 10, a negative plate 20 and a positive plate 30, specifically, the battery core body is composed of the diaphragm 10, the negative plate 20 and the positive plate 30 which are sequentially stacked, the number of the diaphragm 10, the negative plate 20 and the positive plate 30 is not specifically limited, and can be adjusted according to the use requirement of the battery core, in the embodiment, the diaphragm 10 is 10, the negative plate 20 is 9, the positive plate 30 is 8, and the battery core body is sequentially stacked according to the sequence of the diaphragm 10, the negative plate 20 and the positive plate 30.
Further, the separator 10 completely covers the negative electrode sheet 20, the negative electrode sheet 20 completely covers the positive electrode sheet 30, and the size of the separator can be adjusted according to the use requirement of the battery cell on the premise that the above requirement is met, it should be noted that the length of the separator 10 exceeds the width of the negative electrode sheet 20 by more than 54mm, and the separators 10 on the two sides of the laminated negative electrode sheet 20 are respectively exposed by more than 27mm, so as to ensure that the separator tabs 101 do not contact the electrode sheets. In the present embodiment, the separator 10 has a length of 150mm and a width of 131 mm; the size of the negative plate 20 is 126mm in length and 96mm in width; the positive electrode sheet 30 had a length of 123mm and a width of 93 mm. Further, the structures of the negative electrode tab 20 and the positive electrode tab 30 are as shown in fig. 1 and fig. 2, a negative electrode tab 201 and a positive electrode tab 301 are respectively reserved on one side edge of the negative electrode tab 20 and one side edge of the positive electrode tab 30, the sizes of the negative electrode tab 201 and the positive electrode tab 301 can be adjusted according to the requirements of the battery cell and the sizes of the negative electrode tab 20 and the positive electrode tab 30, in this embodiment, the sizes of the negative electrode tab 201 and the positive electrode tab 301 are both 28mm wide and 26mm high, and are both 8mm from the edge of the corresponding pole piece, and the negative electrode tab 201 and the positive electrode tab 301 are both located on the same side edge of the battery cell body. Further, as shown in fig. 3, two opposite side edges of the separator 10 are respectively provided with a separator tab 101, the side edge of the battery cell body where the separator tab 101 is located is adjacent to the side edge of the negative electrode tab 201 and the side edge of the positive electrode tab 301, the tail of the separator tab 101 is divided into an upper piece and a lower piece, and the separator 10 can be damaged when the separator tab 101 is welded on the surface.
Further, the battery cell body is wrapped by the aluminum-plastic film 40, specifically, as shown in fig. 5, the aluminum-plastic film 40 is provided inside with a holding cavity, the battery cell body is arranged in the holding cavity, and the holding cavity is filled with electrolyte. The openings are respectively arranged on the side edges of the aluminum-plastic film 40, and the openings are used for penetrating and extending out of the lugs of the battery cell body, so that the openings are arranged to correspond to the lugs on the battery cell body. As shown in fig. 5, the separator tabs 101 are oppositely disposed, with the negative tab 201 and the positive tab 301 on a common side adjacent to the side on which the separator tab 101 is located. Further, the size of the aluminum plastic film 40 is adjusted according to the usage requirement of the battery cell and the size of the battery cell body, and therefore, the size is not specifically limited, and in this embodiment, the size is 300mm long and 160mm wide.
The invention also discloses a manufacturing method of the quadrupole ear soft-package battery cell shown in the embodiment, which comprises the following steps:
cutting the diaphragm 10, the negative plate 20 and the positive plate 30 according to the design size, and then sequentially performing hot pressing after stacking, wherein the hot pressing is a conventional process in the field and can be adjusted according to the number of the diaphragm 10, the negative plate 20 and the positive plate 30, and in the embodiment, a hot pressing plate at 80 ℃ is adopted to perform hot pressing plasticity on the stacked battery cell;
placing the battery cell body in an accommodating cavity formed by two aluminum-plastic films 40, respectively penetrating a positive electrode tab 301, a negative electrode tab 201 and a diaphragm tab 101 through corresponding outlets on the aluminum-plastic films 40, simultaneously performing heat sealing on the side edge of the aluminum-plastic film 40 where the tab is located at 185 ℃ for 6s and 0.2MPa of air pressure, and leaving the side edge without the tab unsealed temporarily as an electrolyte injection port, placing the battery cell into a drying oven after heat sealing of three edges, vacuumizing to-90 kpa, heating to 80 ℃, flushing nitrogen for 5 minutes every 1 hour, vacuumizing for 10 minutes, and drying for 36 hours in a circulating mode until the moisture is less than 500 ppm;
after injecting 25g of electrolyte into the aluminum plastic film 40 from the non-heat-sealed side edge, performing heat sealing, and it can be understood that the injection amount of the electrolyte here can be designed according to the use requirement of the soft package battery cell, and 25g is injected in this embodiment;
forming, aging and secondary sealing the sealed soft package battery core, discharging gas and residual electrolyte in the soft package battery core, and cutting off redundant aluminum-plastic films to obtain the quadrupole ear soft package battery core.
The quadrupole ear soft-package battery core can perform in-situ measurement on the breakdown voltage of the diaphragm under the condition of not disassembling the battery core, and the specific measurement method comprises the following steps:
the method comprises the steps that a negative pole tab 201 and a positive pole tab 301 are used as charging and discharging tabs, a diaphragm tab 101 is used as a testing tab, before a battery cell is formed, a diaphragm 10 is not damaged, a 20N-30N force is applied to the battery cell in a light pressing mode through an insulating plate, a tester is connected with the diaphragm tab 101 to conduct testing, wherein the starting voltage is 100V-1000V, the ending voltage is 2000V, the step voltage is 50V-100V, the charging time is 500ms, the interval time is 500ms, and when the diaphragm 10 is not penetrated by ions, the high starting voltage and the low step voltage are adopted, so that the breakdown voltage of the diaphragm 10 at the moment is rapidly and accurately measured;
after the battery cell is formed, the diaphragm 10 is penetrated through ions, the electric strength is reduced, the diaphragm tab 101 is glued by an insulating adhesive tape, the diaphragm tab 101 is cleaned by alcohol, the battery cell is lightly pressed by applying a force of 20N-30N through an insulating plate, a tester is connected with the diaphragm tab for testing, the initial voltage is designed to be 50V-300V, the final voltage is 2000V, the step voltage is 10-30V, the charging time is 500ms, the interval time is 500ms, and after the diaphragm 10 is penetrated through ions, the breakdown voltage of the diaphragm 10 at the moment can be accurately measured by adopting the low initial voltage and the low step voltage.
According to the invention, the quadrupole ear soft-packaging battery core adopts the structure that the diaphragm wraps the pole piece outside the diaphragm, the diaphragm pole lugs are reserved on two sides of the diaphragm, and the diaphragm pole lugs are used as the test pole lugs, so that the breakdown voltage can be tested at any time under the condition that the battery core is not disassembled and the internal structure of the battery core is not influenced, the in-situ measurement of the breakdown voltage of the diaphragm is realized, the accuracy of the measurement result is high, the measurement cost is low, data support is provided for the production of the high-power-resistance diaphragm and the diaphragm identification, and meanwhile, the blank of the breakdown voltage test.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The utility model provides a soft packet of electricity core of quadrupole ear which characterized in that, the soft packet of electricity core of four utmost points ear includes:
the battery cell comprises a battery cell body, wherein the battery cell body comprises a diaphragm, a negative plate and a positive plate, the diaphragm is sequentially arranged in parallel, the negative plate is provided with a negative electrode tab at the side edge, and the positive plate is provided with a positive electrode tab at the side edge; the two opposite side edges of the diaphragm are respectively provided with a diaphragm tab, the side edge where the diaphragm tab is located is adjacent to the side edge where the positive electrode tab and the negative electrode tab are located, and the diaphragm tab is not in contact with the positive electrode plate and the negative electrode plate;
the inside plastic-aluminum membrane that has the holding chamber, electric core body arranges in the holding intracavity, the holding intracavity is annotated there is electrolyte, the messenger is seted up to the side of plastic-aluminum membrane the export that anodal utmost point ear, negative pole utmost point ear and diaphragm utmost point ear run through.
2. The quadrupole ear soft pack cell of claim 1, wherein the length of the separator exceeds the width of the negative plate by more than 54 mm.
3. A quadrupole ear soft pack cell according to claim 1, wherein the connection part of the membrane tab and the membrane is divided into an upper piece and a lower piece.
4. A quadrupole ear soft pack cell according to claim 1, wherein the aluminum plastic film is two pieces having a length of 300mm and a width of 160 mm;
the diaphragm is 150mm long and 131mm wide;
the size of the negative plate is 126mm in length and 96mm in width;
the size of the positive plate is 123mm in length and 93mm in width;
the sizes of the anode tab and the cathode tab are 28mm in width and 26mm in height.
5. The quadrupole ear soft-pack cell of claim 1, wherein the separator is 10 sheets, the negative electrode sheet is 9 sheets, and the positive electrode sheet is 8 sheets.
6. A method for manufacturing a quadrupole ear soft pack cell according to any of claims 1 to 5, comprising the steps of:
sequentially stacking the cut diaphragm, the negative plate and the positive plate in sequence and then carrying out hot pressing;
welding a diaphragm tab to obtain a cell body;
placing the cell body in an accommodating cavity formed by two aluminum-plastic films, respectively penetrating a positive electrode lug, a negative electrode lug and a diaphragm lug through corresponding outlets on the aluminum-plastic films, and baking after heat sealing the side edge of the aluminum-plastic film where the lug is located until the moisture content is less than 500 ppm;
injecting electrolyte into the aluminum plastic film from the side edge which is not subjected to heat sealing, and then carrying out heat sealing;
and after the sealed soft-packaged battery cell is formed, aged and sealed for two times, discharging gas and residual electrolyte in the soft-packaged battery cell, and cutting off redundant aluminum-plastic films to obtain the quadrupole ear soft-packaged battery cell.
7. Use of a quadrupole ear softpack cell according to any of claims 1 to 5 for testing the breakdown voltage of a diaphragm.
8. The use of a quadrupole ear soft pack cell according to claim 7 for testing membrane breakdown voltage, wherein the method for testing membrane breakdown voltage comprises the steps of:
before the formation of the battery cell, applying a force of 20N-30N to the battery cell by using an insulating plate, and connecting a tester with a diaphragm tab for testing, wherein the design initial voltage is 100V-1000V, the termination voltage is 2000V, the step voltage is 50V-100V, the charging time is 500ms, and the interval time is 500 ms;
after the battery cell is formed, after the diaphragm electrode is glued by an insulating adhesive tape, the diaphragm lug is cleaned, 20N-30N of force is applied to lightly press the battery cell by using an insulating plate, a tester is connected with the diaphragm lug for testing, the initial voltage is designed to be 50V-300V, the final voltage is 2000V, the step voltage is designed to be 10-30V, the charging time is 500ms, and the interval time is 500 ms.
9. The application of the quadrupole ear soft-pack cell of claim 8 in testing the breakdown voltage of a diaphragm, wherein the step of cleaning the diaphragm tabs specifically comprises: and cleaning the diaphragm tab by adopting alcohol.
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| US8568936B1 (en) * | 2012-10-23 | 2013-10-29 | Nissan North America, Inc. | Systems and methods for electrochemical surface area retention using hydrogen crossover |
| CN103022553A (en) * | 2012-12-27 | 2013-04-03 | 天津力神电池股份有限公司 | Overlapped type lithium ion battery |
| JP6176391B2 (en) * | 2014-03-28 | 2017-08-09 | 日産自動車株式会社 | Method of connecting laminated battery, separator and internal resistance measuring device |
| CN104090217A (en) * | 2014-07-10 | 2014-10-08 | 深圳市星源材质科技股份有限公司 | Separator breakdown voltage testing device and method |
| CN104181436A (en) * | 2014-08-13 | 2014-12-03 | 江苏安瑞达新材料有限公司 | Method for testing lithium battery diaphragm short-circuit resistant capacity |
| CN207038604U (en) * | 2017-08-22 | 2018-02-23 | 湖南中锂新材料有限公司 | A kind of high pressure resistant lithium ion battery separator |
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Application publication date: 20201106 Assignee: Hefei Jiachi Technology Co.,Ltd. Assignor: Hefei Guoxuan High-Tech Power Energy Co.,Ltd. Contract record no.: X2021980006071 Denomination of invention: A quadrupole ear soft wrapped electric core and its manufacturing method and Application Granted publication date: 20210611 License type: Common License Record date: 20210713 |