CN111504561A - Method for detecting air tightness of lithium ion battery - Google Patents
Method for detecting air tightness of lithium ion battery Download PDFInfo
- Publication number
- CN111504561A CN111504561A CN202010225938.9A CN202010225938A CN111504561A CN 111504561 A CN111504561 A CN 111504561A CN 202010225938 A CN202010225938 A CN 202010225938A CN 111504561 A CN111504561 A CN 111504561A
- Authority
- CN
- China
- Prior art keywords
- helium
- lithium ion
- ion battery
- detection
- 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
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
-
- 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
-
- 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
Abstract
The invention discloses a method for detecting the air tightness of a lithium ion battery, which comprises the following steps: directly punching a glue nail on a liquid injection port of the lithium ion battery with qualified secondary liquid injection amount, and welding a sealing sheet for sealing; and filling helium at the position of the sealing sheet of the sealed lithium ion battery by positive pressure, and then transferring the lithium ion battery into a detection cavity for helium content detection. The detection method can effectively eliminate the phenomenon of missing judgment or erroneous judgment caused by poor welding.
Description
Technical Field
The invention belongs to the field of lithium ion battery production, and particularly relates to a method for detecting air tightness of a lithium ion battery.
Background
The lithium ion battery is a secondary battery (rechargeable battery) which mainly depends on lithium ions moving between a positive electrode and a negative electrode to work, and has the advantages of high working voltage (the voltage of a single battery reaches 3.6V), small volume, light weight, high energy, no pollution, long cycle life and the like, so that the lithium ion battery is widely applied to various fields, such as portable electronic products, electric vehicles, large-scale power supplies, energy storage fields and the like.
With the rise of the new energy automobile market, lithium ion batteries are also developed at a high speed, wherein the safety of the lithium ion batteries becomes one of the important directions of attention. Generally, in the production process of lithium ion batteries, if poor welding exists and a detection device does not detect problems, the defective products have the potential problem of battery leakage, and the leakage-corroded batteries loaded on automobiles inevitably threaten the personal safety of drivers and passengers.
The method for detecting gas leakage on production site usually adopts a method of returning helium gas after secondary liquid injection, the last helium gas filling of liquid injection is finished after returning to normal pressure, the battery with qualified liquid injection amount is mounted with a glue nail, and helium detection is carried out after laser sealing welding.
Disclosure of Invention
In view of the above, the present invention needs to provide a method for detecting air tightness of a lithium ion battery, in which a battery with a qualified secondary liquid injection amount is directly plugged with a glue nail and sealed without helium filling, and then the lithium ion battery without welding problem is inflated by aligning a helium gas charging nozzle with a position of a welding sealing sheet, and then the battery is transferred into a helium detector detection cavity to detect whether helium gas overflows.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for detecting the air tightness of a lithium ion battery comprises the following steps:
directly punching a glue nail on the liquid injection port of the lithium ion battery with qualified secondary liquid injection amount, and welding a sealing sheet for sealing;
and after the sealing sheet position of the sealed lithium ion battery is subjected to helium filling treatment by positive pressure, the lithium ion battery is transferred into a detection cavity for helium content detection.
Further, the lithium ion battery is an aluminum-shell battery or a steel-shell battery.
Further, the sealing sheet is sealed by laser welding.
Preferably, the sealing sheet is an aluminum sheet.
Furthermore, the lower surface of the aluminum sheet is of a groove structure, a cavity is formed between the aluminum sheet and the step of the liquid injection port, the longitudinal distance of 1-2mm is formed between the upper end face of the rubber nail and the liquid injection port of the lithium ion battery, and the upper end face of the rubber nail is not in contact with the lower surface of the aluminum sheet.
Further, the helium filling treatment comprises the following specific steps: and aligning a helium gas charging nozzle to the position of the sealing sheet, and charging helium in a nozzle-to-nozzle mode, wherein the pipe diameter of the helium gas charging nozzle is larger than that of the sealing sheet.
Further, the positive pressure is 20-80 KPa.
Further, the step of transferring the lithium ion battery to a detection cavity for helium content detection specifically comprises the following steps: and helium detection is carried out in the detection cavity by using a helium detector, if helium is detected, the battery leaks air, and if the content of the helium cannot be detected, the battery is qualified.
Preferably, the parameter of the helium detector is set to be 50Pa/8 s.
Compared with the prior art, the detection method adopts the technical means that qualified batteries after secondary liquid injection are firstly provided with the glue nails, helium is filled in the position of the sealing sheet after laser sealing welding, and helium detection in a helium detector is transposed, so that the air tightness of the lithium ion battery can be effectively detected.
Drawings
Fig. 1 is a schematic diagram illustrating a state of a lithium ion battery 10 according to the present invention during a helium charging process;
FIG. 2 is an enlarged partial cross-sectional view of portion A of FIG. 1;
fig. 3 is a schematic diagram illustrating the lithium ion battery 10 in fig. 1 in a helium test.
In the figure: 10-lithium ion battery, 20-rubber nail, 30-aluminum sheet, 40-helium charging nozzle and 50-helium detection cavity.
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 invention discloses a method for detecting the air tightness of a lithium ion battery, which comprises the following steps:
directly punching a glue nail on the liquid injection port of the lithium ion battery with qualified secondary liquid injection amount, and welding a sealing sheet for sealing;
and after the sealing sheet position of the sealed lithium ion battery is subjected to helium filling treatment by positive pressure, the lithium ion battery is transferred into a detection cavity for helium content detection.
Conventional lithium ion battery is in the manufacturing process, through annotating the liquid the first time after, probably has the loss of partial electrolyte, consequently, still need carry out the secondary and annotate the liquid and carry out the fluid infusion and make notes liquid volume qualified back, beat the glue nail at annotating the liquid mouth, carry out laser welding again and seal, and whether for the welding seam of inspection laser welding has the defect, generally can inject certain helium earlier into the battery before the rubber nail is sealed, carry out the helium again after the tight glue nail of stopper, laser welding and examine. And because the rubber nail stopper tension, the gas tightness is too good, and helium can't follow the rubber nail and pass through when helium detects to can't detect the gas tightness of laser welding department, make the welding bad and the too tight battery of rubber nail detects the gas leakage not out, cause erroneous judgement or miss judgement, bury down hidden danger for lithium ion battery's safe handling. Therefore, according to the method for detecting the air tightness of the lithium ion battery, the lithium ion battery with qualified secondary liquid injection amount is not subjected to helium filling treatment, after a rubber nail is directly punched, a sealing sheet is welded and sealed, then a helium gas charging nozzle is aligned to the position of the sealing sheet, the gas filling area covers the welding seam area of the sealing sheet sealing and laser welding, helium filling treatment is carried out at a certain positive pressure, then a helium detector is used for helium gas detection, if the welding seam is poor, helium gas enters a cavity between the sealing sheet and the rubber nail through the welding seam, and when helium gas detection is carried out, the helium gas can overflow through the welding seam, so that the poor welding seam is detected; if the welding line is qualified, helium does not enter the battery after helium filling treatment, and no helium overflows when helium detection is carried out. The detection method can effectively eliminate the phenomenon that the lithium ion battery with poor welding cannot be detected due to the over-tightness of the glue nail plug of the liquid injection port.
Further, the lithium ion battery is an aluminum-shell battery or a steel-shell battery.
Further, the sealing plate is sealed by welding methods conventional in the art, and in some embodiments of the invention, the sealing plate is sealed by laser welding.
Further, the sealing sheet of the present invention is made of a material conventional in the art, and preferably, in some embodiments of the present invention, the sealing sheet is an aluminum sheet.
Furthermore, the lower surface of the aluminum sheet is of a groove structure, a cavity is formed between the aluminum sheet and the step of the liquid injection port, the longitudinal distance of 1-2mm is formed between the upper end face of the rubber nail and the liquid injection port of the lithium ion battery, and the upper end face of the rubber nail is not in contact with the lower surface of the aluminum sheet. It can be understood that the lower surface of the aluminum sheet is designed into a groove structure, and the liquid injection port is designed into a structure with steps inwards, so that the aluminum sheet is mainly positioned, and the aluminum sheet has a good buckling effect. The upper end face of the limiting rubber nail is not completely attached to the aluminum sheet, so that a certain space exists between the limiting rubber nail and the aluminum sheet, and a space is reserved for helium to charge helium for a battery with poor sealing welding.
Further, the helium filling treatment comprises the following specific steps: and aligning a helium gas charging nozzle to the position of the sealing sheet, and charging helium in a nozzle-to-nozzle mode, wherein the pipe diameter of the helium gas charging nozzle is larger than that of the sealing sheet.
Further, the positive pressure is 20-80 KPa. It can be understood that the positive pressure of the helium filling process can be adjusted according to actual conditions, such as the accommodation amount of the cavity between the step of the liquid filling port and the sealing sheet, so as to ensure the helium gas filling pressure without causing battery deformation.
Further, the step of transferring the lithium ion battery to a detection cavity for helium content detection specifically comprises the following steps: and helium detection is carried out in the detection cavity by using a helium detector, if helium is detected, the battery leaks air, and if the content of the helium cannot be detected, the battery is qualified.
Preferably, the parameter of the helium detector is set to 50Pa/8s, it is understood that it can be adjusted according to the specification of the battery, and therefore, it is not limited specifically, and the parameters in some embodiments of the present invention are given here.
The technical scheme of the invention is further clearly and completely explained by combining specific embodiments.
The specific detection method comprises the following steps: as shown in fig. 1 and fig. 2, the lithium ion battery 10 after formation is directly transferred to a secondary liquid injection loading position for vacuum liquid injection, after the secondary liquid injection amount is qualified, helium gas is not required to be filled for treatment, a rubber nail 20 is directly punched at a liquid injection port, the upper end face of the rubber nail 20 has a longitudinal distance of 1-2mm from the liquid injection port, the lithium ion battery is transferred to a welding station, an aluminum sheet 30 with a groove structure on the lower surface is sealed by laser welding, a cavity is formed between the aluminum sheet 30 and the liquid injection port platform, and the lower surface of the aluminum sheet 30 is not in contact with the upper surface of the rubber nail 20. And (3) aligning the helium gas charging nozzle 40 with the position of the aluminum sheet 30 (the pipe diameter of the helium gas charging nozzle 40 is larger than the diameter of the aluminum sheet 30, and the gas charging area comprises the welding seam position of the aluminum sheet 30), and then, inflating the lithium ion battery 10 by using the nozzle-to-nozzle method, and transferring the lithium ion battery into the helium detection cavity 50 for helium gas detection.
Example 1
Selecting 1000 aluminum-shell batteries with the model number of 27175195, performing secondary vacuum liquid injection after formation, and performing conventional detection steps: and filling helium into the battery with qualified secondary liquid injection amount, plugging a glue nail, sealing and welding by laser, transferring the battery into a helium detector detection cavity, vacuumizing to detect the content of the helium, and judging whether the battery leaks air. After routine detection, 1000 qualified batteries are selected, a helium charging nozzle is aligned to a sealing position through a sealing sheet for the 1000 qualified batteries, helium is charged at 30KPa, then the batteries flow into a helium detection cavity, the content of the helium is detected, in the embodiment, the helium detector parameter is 30Pa/5s, and the batteries with air leakage are found. These leaky batteries were collected, subjected to a press test, and found to have a problem of poor welding. The method effectively reduces the phenomenon of leakage judgment and reduces the risk of subsequent battery leakage.
Example 2
And continuously selecting 500 batteries with models of 27175195 every day for one week, performing secondary vacuum liquid injection after formation, directly plugging a glue nail on a liquid injection port of the battery without helium filling treatment after the secondary liquid injection amount is qualified, enabling the upper end face of the glue nail to be longitudinally 1-2mm away from the liquid injection port, then flowing into a sealing welding station, sealing a step hole of the liquid injection port by using an aluminum sheet with a groove structure on the lower surface through laser welding, detecting the qualified battery through appearance after welding, transferring the battery to a helium detection cavity after a helium inflation nozzle is aligned with the position of the aluminum sheet and is filled in a mode of positive 20KPa-80KPa in a nozzle-to-nozzle mode, setting the parameter of a helium detector to be 50Pa/8s, performing helium content detection, if no helium is detected, ensuring that the air tightness is qualified, and detecting the helium, and ensuring. And randomly selecting the batteries with qualified air tightness and the batteries with unqualified helium tests, and performing a pressing test, wherein the test result is consistent with the judgment. Therefore, the detection method can really and effectively eliminate the phenomenon of misjudgment of helium detection leakage of the battery, reduce the risk of liquid leakage of the subsequent battery and further improve the product quality.
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 method for detecting the air tightness of the lithium ion battery is characterized by comprising the following steps of:
directly punching a glue nail on the liquid injection port of the lithium ion battery with qualified secondary liquid injection amount, and welding a sealing sheet for sealing;
and after the sealing sheet position of the sealed lithium ion battery is subjected to helium filling treatment by positive pressure, the lithium ion battery is transferred into a detection cavity for helium content detection.
2. The detection method according to claim 1, wherein the lithium ion battery is an aluminum-can battery or a steel-can battery.
3. The inspection method of claim 1, wherein the sealing sheet is sealed by laser welding.
4. The detection method according to claim 1 or 3, wherein the sealing sheet is an aluminum sheet.
5. The detection method according to claim 4, wherein the lower surface of the aluminum sheet is of a groove structure, a cavity is formed between the aluminum sheet and the step of the liquid injection port, the upper end surface of the glue nail is longitudinally spaced from the liquid injection port of the lithium ion battery by 1-2mm, and the upper end surface of the glue nail is not in contact with the lower surface of the aluminum sheet.
6. The detection method according to claim 1, wherein the helium filling process comprises the following specific steps: and aligning a helium gas charging nozzle to the position of the sealing sheet, and charging helium in a nozzle-to-nozzle mode, wherein the pipe diameter of the helium gas charging nozzle is larger than that of the sealing sheet.
7. The assay of claim 1, wherein the positive pressure is from 20KPa to 80 KPa.
8. The detection method according to claim 1, wherein the step of transferring the lithium ion battery into a detection cavity for helium content detection specifically comprises the steps of: and helium detection is carried out in the detection cavity by using a helium detector, if helium is detected, the battery leaks air, and if the content of the helium cannot be detected, the battery is qualified.
9. The detection method according to claim 8, wherein the parameter of the helium detector is set to 50Pa/8 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010225938.9A CN111504561A (en) | 2020-03-26 | 2020-03-26 | Method for detecting air tightness of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010225938.9A CN111504561A (en) | 2020-03-26 | 2020-03-26 | Method for detecting air tightness of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111504561A true CN111504561A (en) | 2020-08-07 |
Family
ID=71871708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010225938.9A Pending CN111504561A (en) | 2020-03-26 | 2020-03-26 | Method for detecting air tightness of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111504561A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113188727A (en) * | 2021-04-08 | 2021-07-30 | 苏州领湃新能源科技有限公司 | Novel tool and method for detecting positive pressure tightness after nail pressing of lithium battery |
| CN113295352A (en) * | 2021-07-13 | 2021-08-24 | 苏州华智诚精工科技有限公司 | Battery leakproofness check out test set |
| CN113295341A (en) * | 2021-05-19 | 2021-08-24 | 国网天津市电力公司电力科学研究院 | VRLA storage battery cold-resistant heat-resistant sealing performance test method |
| CN113358291A (en) * | 2021-06-22 | 2021-09-07 | 湖北亿纬动力有限公司 | Battery cell and battery cell air tightness detection method |
| CN115036626A (en) * | 2021-03-05 | 2022-09-09 | 比亚迪股份有限公司 | Battery cover plate structure, sealed helium detector and helium detection method thereof |
| CN115441061A (en) * | 2022-08-16 | 2022-12-06 | 湖北钛时代新能源有限公司 | Composite titanium lithium ion battery, negative pressure sealing method and device |
| WO2023165153A1 (en) * | 2022-03-04 | 2023-09-07 | 无锡先导智能装备股份有限公司 | Detection device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150349386A1 (en) * | 2012-12-26 | 2015-12-03 | Toyota Jidosha Kabushiki Kaisha | Method for manufacturing sealed battery |
| CN107631844A (en) * | 2016-07-18 | 2018-01-26 | 万向二三股份公司 | A kind of method for conducting leak test of soft package lithium battery |
| CN108692888A (en) * | 2018-06-05 | 2018-10-23 | 广舜检测技术（上海）有限公司 | A kind of method for conducting leak test of battery liquid-filling mouth enclosuring structure |
| CN108827552A (en) * | 2018-06-08 | 2018-11-16 | 合肥国轩高科动力能源有限公司 | A kind of sealing propertytest system and method after lithium battery fluid injection |
-
2020
- 2020-03-26 CN CN202010225938.9A patent/CN111504561A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150349386A1 (en) * | 2012-12-26 | 2015-12-03 | Toyota Jidosha Kabushiki Kaisha | Method for manufacturing sealed battery |
| CN107631844A (en) * | 2016-07-18 | 2018-01-26 | 万向二三股份公司 | A kind of method for conducting leak test of soft package lithium battery |
| CN108692888A (en) * | 2018-06-05 | 2018-10-23 | 广舜检测技术（上海）有限公司 | A kind of method for conducting leak test of battery liquid-filling mouth enclosuring structure |
| CN108827552A (en) * | 2018-06-08 | 2018-11-16 | 合肥国轩高科动力能源有限公司 | A kind of sealing propertytest system and method after lithium battery fluid injection |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115036626A (en) * | 2021-03-05 | 2022-09-09 | 比亚迪股份有限公司 | Battery cover plate structure, sealed helium detector and helium detection method thereof |
| CN113188727A (en) * | 2021-04-08 | 2021-07-30 | 苏州领湃新能源科技有限公司 | Novel tool and method for detecting positive pressure tightness after nail pressing of lithium battery |
| CN113295341A (en) * | 2021-05-19 | 2021-08-24 | 国网天津市电力公司电力科学研究院 | VRLA storage battery cold-resistant heat-resistant sealing performance test method |
| CN113358291A (en) * | 2021-06-22 | 2021-09-07 | 湖北亿纬动力有限公司 | Battery cell and battery cell air tightness detection method |
| CN113295352A (en) * | 2021-07-13 | 2021-08-24 | 苏州华智诚精工科技有限公司 | Battery leakproofness check out test set |
| WO2023165153A1 (en) * | 2022-03-04 | 2023-09-07 | 无锡先导智能装备股份有限公司 | Detection device |
| CN115441061A (en) * | 2022-08-16 | 2022-12-06 | 湖北钛时代新能源有限公司 | Composite titanium lithium ion battery, negative pressure sealing method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111504561A (en) | Method for detecting air tightness of lithium ion battery | |
| US10014515B2 (en) | Battery | |
| CN104885285A (en) | Method for manufacturing a sealed battery | |
| CN211428266U (en) | Sealing rubber nail for sealing liquid and air leakage of square lithium battery | |
| KR20170082811A (en) | Method for Manufacturing Battery Cell and Device for Eliminating Gas from Battery Cell | |
| CN113074878A (en) | Air tightness detection method for automobile battery | |
| CN103471925B (en) | A kind of checkout gear of casing of lithium ion battery laser weld strength and using method thereof | |
| KR100537603B1 (en) | Test device for leaking used in secondary battery and method for making secondary battery utilizing the same | |
| JP2004152732A (en) | Airtightness inspection method for sealed cell and its instrument | |
| US20230253640A1 (en) | Method for regenerating secondary battery | |
| CN112747868B (en) | Air tightness detection method | |
| CN216815925U (en) | Lithium battery sealing performance detection device | |
| CN105122531A (en) | Production method for sealed batteries | |
| CN106932154A (en) | The leakage analysis method of aluminum plastic film soft package lithium battery | |
| CN110440989B (en) | Method for evaluating lithium ion battery sealing performance | |
| CN110783647A (en) | Repairing method of soft-package gas-swelling battery cell | |
| CN111077455A (en) | Soft package lithium ion battery lithium separation detection method | |
| CN102539080A (en) | Sealing detection method and system for lead-acid storage battery | |
| CN210607526U (en) | A glue nail for lithium ion battery gas leakage detection | |
| CN104064804A (en) | Method For Manufacturing Sealed Battery | |
| CN214375172U (en) | Explosion-proof fixing device for battery charging and discharging detection | |
| CN114614101A (en) | Method for manufacturing cylindrical battery | |
| CN111261949B (en) | Method for manufacturing soft package battery | |
| KR101583409B1 (en) | Apparatus of inspecting leakage of cap-assembly and inspecting method thereof | |
| CN113188727A (en) | Novel tool and method for detecting positive pressure tightness after nail pressing of lithium battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200807 |