CN111082172A - Infiltration method of lithium ion battery pole piece - Google Patents
Infiltration method of lithium ion battery pole piece Download PDFInfo
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- CN111082172A CN111082172A CN201911237778.3A CN201911237778A CN111082172A CN 111082172 A CN111082172 A CN 111082172A CN 201911237778 A CN201911237778 A CN 201911237778A CN 111082172 A CN111082172 A CN 111082172A
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000008595 infiltration Effects 0.000 title claims abstract description 33
- 238000001764 infiltration Methods 0.000 title claims abstract description 33
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 79
- 238000002347 injection Methods 0.000 claims abstract description 71
- 239000007924 injection Substances 0.000 claims abstract description 71
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 32
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000005086 pumping Methods 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 9
- 239000013589 supplement Substances 0.000 claims description 9
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 239000003792 electrolyte Substances 0.000 abstract description 17
- 238000005056 compaction Methods 0.000 abstract description 16
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052744 lithium Inorganic materials 0.000 abstract description 5
- 238000001556 precipitation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical group [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides an infiltration method of a lithium ion battery pole piece, which is characterized in that after a battery core is formed once, secondary liquid injection and formation are carried out. According to the infiltration method of the lithium ion battery pole piece, the infiltration time is reduced, the infiltration efficiency is improved and the time is saved by the secondary liquid injection after the primary formation. And through twice formation, the high-compaction pole piece is promoted to adsorb electrolyte, the phenomenon of lithium precipitation in the charging and discharging process is avoided, and the electrical property and the cycle performance of the high-compaction high-energy lithium ion battery are improved.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to an infiltration method of a lithium ion battery pole piece.
Background
The lithium iron phosphate core has the advantages of high voltage, high specific energy, long charging and discharging life, no memory effect, small environmental pollution and the like, and is widely applied to various fields of industrial production, life and the like. With the rapid development of new energy automobiles and portable electric tools and the miniaturization demand of various electric equipment, people have higher and higher requirements on the energy density of lithium ions. In order to improve the capacity, a high-capacity high-compaction material is developed to be applied to the lithium battery core, and the difficulty in infiltrating the pole pieces is increased due to the fact that the compaction density of the pole pieces of the battery core is continuously improved. In order to produce a better lithium ion battery, the impregnation process in its production must be optimized. Particularly, for developing a novel cylindrical lithium battery cell with high energy density, the compact and attached circular winding structure has higher requirements on the infiltration condition.
At present, the pole piece is prepared by uniformly mixing an active substance, a binder, a conductive agent, a dispersing agent and water or an oil-based solvent to prepare slurry, then coating the slurry on a current collector, and rolling and slitting the current collector. The rolled pole piece has small surface roughness and low porosity, and is not beneficial to the infiltration of electrolyte. In particular, in order to pursue the high energy density of the battery core, the coating surface density and the compaction density are usually adopted to be larger, so that the actual porosity inside the pole piece can be greatly reduced, the electrolyte is difficult to fill in the micropores of the pole piece, and the pole piece is difficult to soak. In order not to affect the infiltration of the pole piece, the general method is to prolong the standing time after injection. However, the method has a limit to improve the production efficiency, and has a limit to improve the pole piece infiltration with high coating surface density and high compaction density. Particularly for a large cylindrical battery cell, liquid is generally injected from a liquid injection port until the electrolyte soaks the whole roll core, the time generally needed is long, the liquid injection effect is difficult to ensure to be completely good, and the soakage effect can influence the electrical property and the cycle performance of the whole battery cell, so that the soakage problem of the battery cell is improved to the utmost extent.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides an infiltration method of a lithium ion battery pole piece.
The invention provides an infiltration method of a lithium ion battery pole piece, which is characterized in that after a battery core is formed once, secondary liquid injection and formation are carried out.
Preferably, the method specifically comprises the following steps: after vacuumizing and injecting liquid into the baked battery cell, standing the battery cell at a first time value at high temperature, and then pre-charging the battery cell step by charging equipment to complete one-time formation; and then, secondarily injecting the pre-formed battery cell, standing at a high temperature for a second time value, and then supplementing electricity to the battery cell step by charging equipment to complete secondary formation.
Preferably, after the first liquid injection, the liquid-injected battery core is placed at a high temperature and formed in an unsealed state; and then carrying out secondary liquid injection on the once-formed battery cell until the liquid retention of the battery cell reaches a preset liquid volume threshold value, and then sealing the battery cell.
Preferably, the method for the first injection comprises the following steps: placing the baked battery cell on an automatic liquid injection machine for vacuum pumping and liquid injection, wherein the vacuum degree is-90 to-95 kPa; and pressurizing the battery cell at normal temperature, and discharging gas in the positive and negative electrode coatings and the diaphragm gap in the battery cell.
Preferably, the specific way of vacuum pumping and liquid injection is as follows: and (4) performing high-pressure vacuum-pumping-vacuum-breaking on the battery cell, and circulating for four to six times.
Preferably, the secondary injection adopts a vacuum pumping injection mode, and the vacuum degree is-90 to-95 kPa.
Preferably, the first time value is 24 h-48 h, and the second time value is 8 h-24 h.
Preferably, the environmental temperature of the two times of high-temperature shelf is 35-45 ℃. .
Preferably, in the one-time formation process, the specific manner of precharging the battery cell step by step through the charging device is as follows: and on a charging device, the battery cell is pre-charged step by using a small-rate current of 0.02C-0.1C, and the charging time is 60min-300min respectively.
Preferably, in the secondary formation process, the specific manner of performing step-by-step power supplement on the battery cell through the charging device is as follows: on a charging device, the current of 0.1-0.5C is used for step-by-step power supplement, the charging upper limit voltage is 3.65V, and the charging time is 60-120 min.
According to the infiltration method of the lithium ion battery pole piece, the infiltration time is reduced, the infiltration efficiency is improved and the time is saved by the secondary liquid injection after the primary formation. And through twice formation, the high-compaction pole piece is promoted to adsorb electrolyte, the phenomenon of lithium precipitation in the charging and discharging process is avoided, and the electrical property and the cycle performance of the high-compaction high-energy lithium ion battery are improved.
Drawings
Fig. 1 is a flow chart of an infiltration method of a lithium ion battery pole piece according to the present invention.
Detailed Description
Referring to fig. 1, according to the infiltration method for the lithium ion battery pole piece provided by the invention, after a battery core is formed once, secondary liquid injection and formation are performed. In the embodiment, the infiltration time is reduced, the infiltration efficiency is improved and the time is saved by the secondary injection after the primary formation. And through twice formation, the high-compaction pole piece is promoted to adsorb electrolyte, the phenomenon of lithium precipitation in the charging and discharging process is avoided, and the electrical property and the cycle performance of the high-compaction high-energy lithium ion battery are improved.
When the method is specifically implemented, the baked battery cell is vacuumized and injected with liquid, then placed at a first time value at high temperature, and then precharged step by charging equipment to complete one-time formation; and then, secondarily injecting the pre-formed battery cell, standing at a high temperature for a second time value, and then supplementing electricity to the battery cell step by charging equipment to complete secondary formation.
In the embodiment, after the first liquid injection, the battery cell after the liquid injection is placed at a high temperature and formed in an unsealed state; and then carrying out secondary liquid injection on the once-formed battery cell until the liquid retention of the battery cell reaches a preset liquid volume threshold value, and then sealing the battery cell.
Therefore, in the embodiment, the high-compaction pole pieces are fully infiltrated by six stages of vacuum-pumping liquid injection, high-temperature shelving, primary formation, secondary liquid injection, high-temperature shelving and sealing and secondary formation, the infiltration time is greatly reduced by twice high-temperature shelving, and the infiltration efficiency is improved.
In this embodiment, the first injection method includes: and (3) placing the baked battery cell on an automatic liquid injection machine for vacuum pumping and liquid injection, wherein the vacuum degree is-90 to-95 kPa. Specifically, during vacuum pumping and liquid injection, the high-pressure vacuum pumping, the vacuum maintaining and the vacuum breaking are carried out on the battery cell, and the cycle is carried out for four to six times. After vacuum pumping and liquid injection, the battery core is pressurized at normal temperature, and gas in the positive and negative electrode coatings and the diaphragm gap in the battery core is discharged, so that the electrolyte can smoothly enter the pole piece and the diaphragm.
The high-temperature shelf method after the first liquid injection comprises the following steps: and (3) placing the unsealed battery cell at the temperature of 35-45 ℃ after vacuumizing and liquid injection, wherein the liquid injection port is upward, and the first time value is 24-48 h. After the first injection, the injection port of the battery cell is not sealed, so that the second injection is facilitated. And when the high-temperature shelving method is specifically implemented, in the high-temperature shelving process, the dew point and the temperature of the high-temperature shelving room need to be strictly controlled, and the phenomenon that a roll core and electrolyte absorb water in the unsealed high-temperature shelving process is prevented. High-temperature shelving is favorable for accelerating the diffusion of electrolyte, so that the electrolyte can permeate into the battery core
In the one-time formation process, the specific mode of performing step-by-step pre-charging on the battery cell through the charging equipment is as follows: and on a charging device, the battery cell is pre-charged step by using a small-rate current of 0.02C-0.1C, and the charging time is 60min-300min respectively. The small-current formation is favorable for forming a uniform and stable passive film to activate the battery cell, and the one-time formation charging is favorable for soaking the electrolyte into the pole piece.
The secondary injection adopts a vacuum pumping injection mode, and the vacuum degree is-90 to-95 kPa. Specifically, in the step, the once-formed battery cell can be placed on an automatic liquid injection machine, vacuumized to-90 to-95 kPa, and subjected to high pressure, vacuumization, vacuum-fidelity and vacuum breaking, and the operations are circulated for two to three times to complete secondary liquid injection. And circulating operation, so that the electrolyte can further permeate in the battery core through pressure extrusion. In the embodiment, in the secondary liquid injection process, the cycle times of high pressure-vacuumizing-vacuum-maintaining-vacuum breaking are less than that in the primary liquid injection, so that the electrolyte originally injected into the electric core is prevented from being pumped out reversely.
In the embodiment, the shortage of the primary liquid injection amount and the loss of the gas and liquid injection generated in the pre-formation process are compensated through secondary liquid injection, so that the liquid retaining amount of the battery cell is sufficient in the subsequent use process, the good electrical property is maintained, and the cycle life is prolonged.
And after secondary injection, the battery cell is placed at the temperature of 35-45 ℃ for a second time value, wherein the second time value is 8-24 h. The high-temperature placement is beneficial to removing gas generated in the formation process, so that the activated SEI film is more uniform and stable, and the generation of bubbles and poor pole piece interface after sealing are avoided. The high-compaction pole piece has small pores, and meanwhile, the high-temperature placement is also beneficial to the diffusion and infiltration of electrolyte in the pole piece. In specific implementation, after high-temperature shelving, the battery cell is sealed and cleaned.
In the secondary formation process, the specific mode of performing step-by-step electricity supplement on the battery cell through the charging equipment is as follows: on a charging device, the current of 0.1-0.5C is used for step-by-step power supplement, the charging upper limit voltage is 3.65V, and the charging time is 60-120 min. And finishing the infiltration process of the high-capacity high-compaction lithium ion battery after the secondary formation is finished.
The invention is further illustrated below with reference to several specific examples.
Example 1
A method for infiltrating a high-compaction high-energy lithium ion battery pole piece specifically comprises the following steps:
1) vacuumizing and injecting liquid: placing the baked battery cell on an automatic liquid injection machine, vacuumizing to-90 to-95 kPa, and circulating the operations for four times through high pressure, vacuumizing, vacuum-maintaining and vacuum breaking; and then pressurizing the battery cell under the normal temperature condition, and extruding the battery cell through external pressure so as to discharge gas in positive and negative electrode coatings and diaphragm gaps inside the battery cell, so that the electrolyte can smoothly enter the pole piece and the diaphragm.
2) High-temperature laying aside: and (3) placing the unsealed battery cell at the temperature of 40 ℃ after vacuumizing and injecting liquid, wherein the liquid injection port is upward, and the placing time is 24 hours.
3) Pre-formation: and (3) on a charging device, performing step-by-step pre-charging on the battery cell after the step 2) by using a low-rate current, specifically, charging for 120min at 0.05C and charging for 60min at 0.1C.
4) Secondary liquid injection: performing secondary liquid injection on the battery cell after the step 3), and supplementing the liquid to a design value required by the battery cell, namely the final liquid retention capacity required by the battery cell; the secondary liquid injection method comprises the following steps: arranging the pre-formed battery cell on an automatic liquid injection machine, and vacuumizing: circulating the operations for two times through high pressure, vacuum pumping, vacuum maintaining and vacuum breaking under the pressure of-90 to-95 kPa;
5) high-temperature laying aside: and (3) standing the battery cell after the step 4) at the temperature of 35-45 ℃ for 12 h.
6) Continuing to form: on a charging device, respectively carrying out power supplement on the battery cell which is subjected to the step 5) by using a small current, and charging for 60min at 0.1C and charging to 3.65V at 0.2C;
example 2
A method for infiltrating a high-compaction high-energy lithium ion battery pole piece specifically comprises the following steps:
1) vacuumizing and injecting liquid: placing the baked battery cell on an automatic liquid injection machine, vacuumizing to-90 to-95 kPa, and circulating the operations for six times through high pressure, vacuumizing, vacuum-maintaining and vacuum breaking; pressurizing the battery core under the normal temperature condition, and extruding the battery core through external pressure so as to discharge gas in positive and negative electrode coatings and diaphragm gaps inside the battery core, so that electrolyte can smoothly enter the pole piece and the diaphragm;
2) high-temperature laying aside: placing the unsealed battery cell at the temperature of 45 ℃ after vacuumizing and injecting liquid, wherein the liquid injection port is upward, and the placing time is 36 h;
3) pre-formation: on a charging device, performing step-by-step pre-charging on the battery cell after the step 2) by using a low-rate current, and charging for 300min at 0.02C and 60min at 0.1C;
4) secondary liquid injection: performing secondary liquid injection on the battery cell after the step 3), and supplementing the liquid to a design value required by the battery cell, namely the final liquid retention capacity required by the battery cell; the secondary liquid injection method comprises the following steps: arranging the pre-formed battery cell on an automatic liquid injection machine, and vacuumizing: the pressure is between 90 and 95kPa, and the operation is circulated for three times through high pressure, vacuum pumping, vacuum fidelity and vacuum breaking;
5) high-temperature laying aside: standing the battery cell after the step 4) at the temperature of 40 ℃ for 48 hours;
6) continuing to form: on a charging device, respectively carrying out power supplement on the battery cell which is subjected to the step 5) by using a small current, and charging for 120min at 0.1C and charging to 3.65V at 0.2C;
example 3
A method for infiltrating a high-compaction high-energy lithium ion battery pole piece specifically comprises the following steps:
1) vacuumizing and injecting liquid: arranging the baked battery core on an automatic liquid injection machine, vacuumizing: the pressure is between 90 and 95kPa, and the operation is circulated for six times through high pressure, vacuum pumping, vacuum fidelity and vacuum breaking; pressurizing the battery core under the normal temperature condition, and extruding the battery core through external pressure so as to discharge gas in positive and negative electrode coatings and diaphragm gaps inside the battery core, so that electrolyte can smoothly enter the pole piece and the diaphragm;
2) high-temperature laying aside: placing the unsealed battery cell at the temperature of 45 ℃ after vacuumizing and liquid injection, wherein the liquid injection port is upward, and the placing time is 48 h;
3) pre-formation: on a charging device, performing step-by-step pre-charging on the battery cell after the step 2) by using a low-rate current, and performing 0.02C charging for 300min and 0.05C charging for 120 min;
4) secondary liquid injection and sealing: performing secondary liquid injection on the battery cell after the step 3), and supplementing to a design value of the battery cell requirement (final liquid retention capacity required by the battery cell); the secondary liquid injection method comprises the following steps: arranging the pre-formed battery cell on an automatic liquid injection machine, and vacuumizing: the pressure is between 90 and 95kPa, and the operation is circulated for three times through high pressure, vacuum pumping, vacuum fidelity and vacuum breaking;
5) high-temperature laying aside: standing the battery cell after the step 4) at the temperature of 45 ℃ for 8 hours;
6) continuing to form: on a charging device, respectively carrying out power supplement on the battery cell which is subjected to the step 5) by using a small current, and charging for 60min at 0.1C and charging to 3.65V at 0.2C;
the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. A method for infiltrating a lithium ion battery pole piece is characterized in that after a battery core is formed once, secondary liquid injection and formation are carried out.
2. The infiltration method of the lithium ion battery pole piece according to claim 1, is characterized in that: after vacuumizing and injecting liquid into the baked battery cell, standing the battery cell at a first time value at high temperature, and then pre-charging the battery cell step by charging equipment to complete one-time formation; and then, secondarily injecting the pre-formed battery cell, standing at a high temperature for a second time value, and then supplementing electricity to the battery cell step by charging equipment to complete secondary formation.
3. The infiltration method of the lithium ion battery pole piece according to claim 2, characterized in that after the first liquid injection, the liquid-injected battery core is subjected to high-temperature shelving and formation in an unsealed state; and then carrying out secondary liquid injection on the once-formed battery cell until the liquid retention of the battery cell reaches a preset liquid volume threshold value, and then sealing the battery cell.
4. The infiltration method of the lithium ion battery pole piece according to claim 2, wherein the first injection method comprises: placing the baked battery cell on an automatic liquid injection machine for vacuum pumping and liquid injection, wherein the vacuum degree is-90 to-95 kPa; and pressurizing the battery cell at normal temperature, and discharging gas in the positive and negative electrode coatings and the diaphragm gap in the battery cell.
5. The infiltration method of the lithium ion battery pole piece according to claim 4, characterized in that the specific way of vacuum pumping and liquid injection is as follows: and (4) performing high-pressure vacuum-pumping-vacuum-breaking on the battery cell, and circulating for four to six times.
6. The infiltration method of the lithium ion battery pole piece according to claim 4, characterized in that the secondary injection adopts a vacuum pumping injection mode, and the vacuum degree is-90 to-95 kPa.
7. The infiltration method of the lithium ion battery pole piece of claim 2, wherein the first time value is 24h to 48h, and the second time value is 8h to 24 h.
8. The infiltration method of the lithium ion battery pole piece according to claim 7, wherein the ambient temperature of the two times of high-temperature shelf is 35 ℃ to 45 ℃.
9. The infiltration method of the lithium ion battery pole piece according to claim 2, wherein in the one-time formation process, the specific way of pre-charging the battery cell step by step through the charging device is as follows: and on a charging device, the battery cell is pre-charged step by using a small-rate current of 0.02C-0.1C, and the charging time is 60min-300min respectively.
10. The infiltration method of the lithium ion battery pole piece according to claim 9, wherein in the secondary formation process, the specific way of step-by-step electricity supplement to the battery cell through the charging device is as follows: on a charging device, the current of 0.1-0.5C is used for step-by-step power supplement, the charging upper limit voltage is 3.65V, and the charging time is 60-120 min.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111710928A (en) * | 2020-06-10 | 2020-09-25 | 包头昊明稀土新电源科技有限公司 | Formation method of water-based power battery |
| CN112038562A (en) * | 2020-09-28 | 2020-12-04 | 合肥国轩高科动力能源有限公司 | Liquid injection process for end face welding cylindrical lithium ion battery |
| CN112366356A (en) * | 2020-07-29 | 2021-02-12 | 万向一二三股份公司 | Method for improving battery cell infiltration effect and lithium ion battery cell |
| CN112736287A (en) * | 2020-12-25 | 2021-04-30 | 惠州亿纬创能电池有限公司 | Electrode wetting method, electrode and battery |
| CN112736321A (en) * | 2020-12-30 | 2021-04-30 | 芜湖天弋能源科技有限公司 | Cooling device for lithium ion cell liquid injection and liquid injection method |
| CN113193236A (en) * | 2021-05-06 | 2021-07-30 | 合肥国轩高科动力能源有限公司 | Infiltration formation method of lithium ion battery |
| CN113258155A (en) * | 2021-04-25 | 2021-08-13 | 浙江锋锂新能源科技有限公司 | Method for judging infiltration state of lithium ion battery |
| CN114373997A (en) * | 2022-02-08 | 2022-04-19 | 远景动力技术(江苏)有限公司 | Method for infiltrating pole piece with electrolyte |
| CN114824531A (en) * | 2022-05-30 | 2022-07-29 | 重庆太蓝新能源有限公司 | Electrode infiltration method, lithium ion battery cell and lithium ion battery |
| CN115986339A (en) * | 2021-10-15 | 2023-04-18 | 宁德时代新能源科技股份有限公司 | Lithium ion battery manufacturing method and lithium ion battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109065826A (en) * | 2018-07-06 | 2018-12-21 | 合肥国轩高科动力能源有限公司 | Infiltration method of high-capacity high-compaction negative electrode lithium ion battery |
| CN110247121A (en) * | 2019-06-25 | 2019-09-17 | 桑顿新能源科技有限公司 | The electrolyte wetting method of lithium ion battery and its lithium ion battery and electronic device being prepared |
-
2019
- 2019-12-06 CN CN201911237778.3A patent/CN111082172A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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