CN107706461A - Negative pressure formation method for power lithium ion battery - Google Patents
Negative pressure formation method for power lithium ion battery Download PDFInfo
- Publication number
- CN107706461A CN107706461A CN201710947456.2A CN201710947456A CN107706461A CN 107706461 A CN107706461 A CN 107706461A CN 201710947456 A CN201710947456 A CN 201710947456A CN 107706461 A CN107706461 A CN 107706461A
- Authority
- CN
- China
- Prior art keywords
- chemical conversion
- negative pressure
- ion battery
- case
- power lithium
- 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
- 238000000034 method Methods 0.000 title claims abstract description 19
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 16
- 230000015572 biosynthetic process Effects 0.000 title abstract description 11
- 239000000126 substance Substances 0.000 claims description 66
- 238000006243 chemical reaction Methods 0.000 claims description 65
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000007600 charging Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000003786 synthesis reaction Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052744 lithium Inorganic materials 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001872 inorganic gas Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding 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
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a negative pressure formation method of a power lithium ion battery, which adopts a negative pressure formation box, so that the battery is in a negative pressure environment in the formation process, and the defect of normal pressure formation of an opening is overcome. The negative pressure formation is an integral negative pressure formation, the negative pressure consistency is improved, the negative electrode interface is improved, a more stable and more compact SEI film is formed, and the multiplying power and the cycle performance of the lithium battery are greatly improved.
Description
Technical field
The present invention relates to technical field of lithium-ion battery, more particularly to a kind of chemical conversion of power lithium-ion battery negative pressure
Method.
Background technology
Lithium ion battery is due to operating voltage height, energy density is big, self-discharge rate is small, stablizes the advantage of environmental protection etc.,
At present in digital product power supply, automobile power cell and large-scale energy-storage battery etc. performer and its important role.From
From the point of view of present case, chemical conversion is mainly melted into using opening normal pressure, and such formation regime shortcoming has：1) influenceed by ambient moisture
It is larger；2) because gas caused by formation SEI films can stop in negative terminal surface when being melted into, interface is caused dead band, analysis lithium occur so that
Reversible capacity is reduced, and coulombic efficiency reduces first；3) organic gas, inorganic gas are discharged into workshop caused by chemical conversion, and employee is good for
Health threatens；Etc..
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of side of power lithium-ion battery negative pressure chemical conversion
Method.
A kind of method of power lithium-ion battery negative pressure chemical conversion proposed by the present invention, comprises the following steps：
S1, by battery be put into chemical conversion pallet in, pallet be put into vacuum chemical conversion case, then connection chemical conversion case cable；
S2, predetermined vacuum value is evacuated to chemical conversion case；
S3, start to be melted into, after chemical conversion terminates, chemical conversion case vacuumized again, is then filled with drying nitrogen into chemical conversion case,
Further take out battery.
Preferably, chemical conversion case is connected with vacuum valve, and in step S2 and S3, chemical conversion case is vacuumized by opening vacuum valve.
Preferably, cable is accessed cavity by chemical conversion case using aviation plug.
Preferably, predetermined vacuum value is 20000~5000Pa.
Preferably, in step S3, chemical synthesis technology is：0.02C charging 4h or 0.2C chargings 3h.
A kind of method of power lithium-ion battery negative pressure chemical conversion proposed by the present invention is using negative pressure chemical conversion case so that was melted into
Battery is in the environment of negative pressure in journey, solves the shortcomings that opening normal pressure chemical conversion.This negative pressure is integrally formed negative pressure chemical conversion, carries
The high uniformity of negative pressure, improves cathode interface, forms more stable, finer and close SEI films, substantially improve lithium battery times
Rate and cycle performance.
Brief description of the drawings
Fig. 1 is a kind of method flow diagram of power lithium-ion battery negative pressure chemical conversion proposed by the present invention；
Fig. 2 is melted into schematic diagram for chemical conversion case negative pressure；
Fig. 3 is 400 weeks curves of circulating battery in embodiment.
Embodiment
A kind of reference picture 1, method of power lithium-ion battery negative pressure chemical conversion proposed by the present invention, comprises the following steps.
S1, by battery be put into chemical conversion pallet in, pallet be put into vacuum chemical conversion case, then connection chemical conversion case cable.This step
In, the number of batteries being put into chemical conversion case can accommodate quantity decision according to number of batteries to be changed and chemical conversion case.This reality
Apply in mode, carry out overall negative pressure chemical conversion by the way that the battery of predetermined number is put into chemical conversion case, rather than battery cell is entered
Row negative pressure, overall negative pressure chemical conversion can improve battery negative pressure uniformity, while the improvement cathode interface that negative pressure can be larger.
S2, predetermined vacuum value is evacuated to chemical conversion case.Specifically, chemical conversion case can be connected vacuum valve, it is true by opening
Empty valve, chemical conversion case is evacuated down to predetermined vacuum value.In present embodiment, predetermined vacuum value is 20000~5000Pa, this vacuum
Scope had both reached the effect of negative pressure chemical conversion, that is, improved cathode interface, reduces irreversible capacity, improve coulombic efficiency first, again
It is unlikely to from battery to extract electrolyte out.
S3, start to be melted into, after chemical conversion terminates, chemical conversion case vacuumized again, is then filled with drying nitrogen into chemical conversion case,
Further take out battery.In this step, chemical conversion case is vacuumized by opening vacuum valve certain time, specific vacuum valve opening time
It can be determined according to number of batteries in chemical conversion case.In this step, chemical synthesis technology is：0.02C charging 4h or 0.2C chargings 3h.
In this step S3, caused gas and negative pole table will be also remained in by vacuumizing, in formation process of having drained
The bubble in face is extracted out, avoids causing to analyse lithium around bubble in follow-up charge and discharge process.
In step S1, cable is accessed cavity by chemical conversion case using aviation plug, to ensure to be melted into case sealing property, so as to
It ensure that vacuum in negative pressure formation process.
In present embodiment, chemical conversion box structure is as shown in Fig. 2 wherein, 1 is chemical conversion pallet, and 2 be vacuum valve, and 3 fill for nitrogen
Enter valve, 4 be cable, and 5 be aviation plug, and A is battery.
Embodiment 1
In the present embodiment, negative pressure chemical conversion scheme is as follows：
S1, battery is put into chemical conversion pallet, is put into negative pressure chemical conversion case, connects line, shut chemical conversion chamber door, be evacuated to
20000~5000Pa.In this step, battery to be changed is by closing the processes such as slurry, coating, roll-in, cutting, winding, assembling, fluid injection
Obtain.
S2, start chemical conversion program, start to be melted into, chemical synthesis technology is 0.02C charging 4h/0.2C chargings 3h.
After S3, chemical conversion terminate, continue to vacuumize 10~20min, be filled with dry N2, door of unpacking, power taking pond；Then, it is right
Battery carries out high temperature ageing, secondary fluid injection, partial volume, surveys battery performance.
As shown in figure 3, in the present embodiment, battery life is inversely proportional with circulation chemical conversion number, when chemical conversion circulation 400 weeks, electricity
Tankage conservation rate is more than 95%.The foregoing is only a preferred embodiment of the present invention, but protection model of the invention
Enclose and be not limited thereto, any one skilled in the art the invention discloses technical scope in, according to this hair
Bright technical scheme and its inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (5)
- A kind of 1. method of power lithium-ion battery negative pressure chemical conversion, it is characterised in that comprise the following steps：S1, by battery be put into chemical conversion pallet in, pallet be put into vacuum chemical conversion case, then connection chemical conversion case cable；S2, predetermined vacuum value is evacuated to chemical conversion case；S3, start to be melted into, after chemical conversion terminates, chemical conversion case is vacuumized again, is then filled with drying nitrogen into chemical conversion case, then take Go out battery.
- 2. the method for power lithium-ion battery negative pressure chemical conversion as claimed in claim 1, it is characterised in that chemical conversion case is connected with very Empty valve, in step S2 and S3, chemical conversion case is vacuumized by opening vacuum valve.
- 3. the method for power lithium-ion battery negative pressure chemical conversion as claimed in claim 1, it is characterised in that chemical conversion case uses aviation Cable is accessed cavity by plug.
- 4. the method for the power lithium-ion battery negative pressure chemical conversion as described in claim 1 or 2 or 3, it is characterised in that predetermined vacuum It is worth for 20000~5000Pa.
- 5. the method for the power lithium-ion battery negative pressure chemical conversion as described in claim 1 or 2 or 3, it is characterised in that step S3 In, chemical synthesis technology is：0.02C charging 4h or 0.2C chargings 3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947456.2A CN107706461A (en) | 2017-10-12 | 2017-10-12 | Negative pressure formation method for power lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947456.2A CN107706461A (en) | 2017-10-12 | 2017-10-12 | Negative pressure formation method for power lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107706461A true CN107706461A (en) | 2018-02-16 |
Family
ID=61184837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710947456.2A Pending CN107706461A (en) | 2017-10-12 | 2017-10-12 | Negative pressure formation method for power lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107706461A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449495A (en) * | 2018-11-09 | 2019-03-08 | 浙江杭可科技股份有限公司 | Lithium battery cavity negative pressure formation method and device |
| CN114020060A (en) * | 2022-01-10 | 2022-02-08 | 深圳市铂纳特斯自动化科技有限公司 | Negative pressure vacuum control system for battery formation equipment and automatic control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201112497Y (en) * | 2007-08-22 | 2008-09-10 | 比亚迪股份有限公司 | Vacuum box used for battery chemical synthesis and battery vacuum chemical synthesis device |
| CN201549558U (en) * | 2009-05-15 | 2010-08-11 | 深圳市鸿德电池有限公司 | Integrated clamp for lithium ion battery liquid injection and formation |
| CN202145481U (en) * | 2011-06-28 | 2012-02-15 | 中航锂电（洛阳）有限公司 | Lithium battery vacuum formation device |
-
2017
- 2017-10-12 CN CN201710947456.2A patent/CN107706461A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201112497Y (en) * | 2007-08-22 | 2008-09-10 | 比亚迪股份有限公司 | Vacuum box used for battery chemical synthesis and battery vacuum chemical synthesis device |
| CN201549558U (en) * | 2009-05-15 | 2010-08-11 | 深圳市鸿德电池有限公司 | Integrated clamp for lithium ion battery liquid injection and formation |
| CN202145481U (en) * | 2011-06-28 | 2012-02-15 | 中航锂电（洛阳）有限公司 | Lithium battery vacuum formation device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449495A (en) * | 2018-11-09 | 2019-03-08 | 浙江杭可科技股份有限公司 | Lithium battery cavity negative pressure formation method and device |
| CN109449495B (en) * | 2018-11-09 | 2024-07-19 | 浙江杭可科技股份有限公司 | Negative pressure formation method and device for lithium battery cavity |
| CN114020060A (en) * | 2022-01-10 | 2022-02-08 | 深圳市铂纳特斯自动化科技有限公司 | Negative pressure vacuum control system for battery formation equipment and automatic control method thereof |
| CN114020060B (en) * | 2022-01-10 | 2022-03-25 | 深圳市铂纳特斯自动化科技有限公司 | Negative pressure vacuum control system for battery formation equipment and automatic control method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180216 |