CN108155424A - A kind of control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold - Google Patents
A kind of control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold Download PDFInfo
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- CN108155424A CN108155424A CN201711318301.9A CN201711318301A CN108155424A CN 108155424 A CN108155424 A CN 108155424A CN 201711318301 A CN201711318301 A CN 201711318301A CN 108155424 A CN108155424 A CN 108155424A
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- roll
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- lithium ion
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- preliminary filling
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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
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- 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)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to a kind of control method for improving lithium ion Soft Roll laminated batteries diaphragm fold, this method is based on solving the problem of that the fold due to Soft Roll laminated lithium ion battery diaphragm influences battery performance.This method comprises the following steps：It is shelved after battery liquid-filling, it is ensured that electrolyte fully infiltrates pole piece；Then roll-in is carried out to the battery after shelving, the pressure and speed of roll-in are controlled in nipping process；Preliminary filling is carried out to the battery after roll-in；Secondary roll-in finally is carried out to the battery that preliminary filling is completed, shaping further is carried out to diaphragm, side by side except gas, completes two envelopes.Contact interface of the lithium ion Soft Roll laminated batteries prepared the present invention is based on this kind of control method compared with not carrying out the battery of roll-in shaping between positive/negative plate and diaphragm is more preferable, nothing causes the dead lithium that folded region is deposited because of the phenomenon that diaphragm fold, so as to give full play to the capacity of positive and negative pole material, improve battery performance.
Description
Technical field
The present invention relates to lithium ion Soft Roll laminated batteries technology fields, and in particular to a kind of novel improvement lithium ion
The control method of Soft Roll laminated batteries diaphragm fold.
Background technology
At present there are mainly three types of the lithium battery encapsulation forms of mainstream：Cylinder, rectangular and Soft Roll, country propose to move to the year two thousand twenty
Power battery specific energy will reach 350Wh/Kg, and rectangular cell is due to being much unable to reach this target, Soft Roll electricity the characteristics of itself
Pond has higher safety relative to rectangular cell, and the weight of battery is lighter under same capacitance grade, and the energy of battery is close
Higher is spent, is increasingly becoming the main product of power battery.
Lithium ion soft-package battery is distinguished mainly from packing type comprising winding and two kinds of patterns of lamination.Lithium ion Soft Roll lamination
Battery has lower internal resistance and superior high rate performance relative to the Soft Roll winding battery under system of the same race, has become vapour
The main selection of vehicle power adapted battery.
Although lithium ion Soft Roll lamination is increasingly becoming the main selection of power battery, there are mesenterial folds mostly for finished battery
The problem of wrinkle（Z-type laminated batteries situation is even more serious）, the performance of battery plus-negative plate active material is seriously affected, is further influenced
The capacity and performance of battery.In order to solve this problem, it is common practice to regulate and control the tension that lamination process septation crosses roller, protect
The consistency of tension is demonstrate,proved, but naked battery core, there are situations such as diaphragm loosening, deformation, is resulting in finished product electric core membrane during circulation
Buckling phenomena.For the method that such phenomenon, portion of techniques scheme use clamping plate chemical conversion, but this method is complicated for operation, is unfavorable for
The volume production of power battery.But with continuous improvement of the electric vehicle to power battery performance requirement, lithium ion Soft Roll laminated batteries
The existing technological problems urgent need to resolve during volume production.
Invention content
The purpose of the present invention is overcoming defect of the existing technology, a kind of roller by increasing before and after battery preliminary filling is provided
Pressure technique controls the pressure and speed of roll-in in nipping process, ensures the abundant exclusion of the shaping effect and process gas of diaphragm,
The method can effectively improve the contact surface of positive/negative plate and diaphragm, ensure good interfacial effect, be further ensured that battery
A kind of control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold of performance.
Realizing the technical solution of the object of the invention is：A kind of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold
Control method includes the following steps：
（1）Battery carries out high temperature after fluid injection is completed and shelves, then by normal temperature shelf, it is ensured that electrolyte fully infiltrates pole piece；
（2）Roll-in is carried out to the battery after shelving by the way of transmission, the pressure and speed of roll-in are controlled in nipping process, is protected
The diaphragm of card fold obtains shaping, side by side except gas between pole piece；
（3）Then preliminary filling, the flow of preliminary filling and the pre-charging lithium ion batteries stream of industrialized production are carried out to the battery for completing roll-in
Journey is consistent；
（4）Gas can be generated during SEI films are formed during preliminary filling, using the technique of secondary roll-in to diaphragm into traveling
The shaping and exhaust of one step control the pressure and speed of roll-in, then complete two envelopes of battery after roll-in；
（5）Remaining flow is consistent with the technique normally produced, is finally completed the making of finished battery.
Step described in above-mentioned technical proposal（2）In, the pressure of roll-in before preliminary filling is controlled in 0.05MPa~0.3MPa.
Step described in above-mentioned technical proposal（2）In, the speed control of roll-in is in the m/s of 0.5 m/s~2 before preliminary filling.
Step described in above-mentioned technical proposal（4）In, the pressure of roll-in after preliminary filling is controlled in 0.05MPa~0.3MPa.
Step described in above-mentioned technical proposal（4）In, the speed control of roll-in is in the m/s of 0.5 m/s~2 after preliminary filling.
Step described in above-mentioned technical proposal（1）In, 45 DEG C of high temperature shelves the time as 24~36h after fluid injection, during normal temperature shelf
Between for 12~for 24 hours.
The rate of charge of above-mentioned technical proposal preliminary filling is 0.01C, 0.05C, 0.1C or 0. 2C.
Step described in above-mentioned technical proposal（4）In, the vacuum degree of two envelopes is≤- 90kPa, and vacuum delay is 3~5s.
In step described in above-mentioned technical proposal (5), normal process flow is：Chemical conversion → partial volume → aging.
After adopting the above technical scheme, the present invention has following positive effect：
（1）The lithium ion Soft Roll laminated batteries of the present invention use the technique of roll-in before and after preliminary filling, by controlling in nipping process
The pressure of roll-in confirms pressing effect, while adjusts the speed of roll-in, ensure diaphragm shaping effect and process gas it is abundant
It excludes, the method can effectively improve the contact surface of positive/negative plate and diaphragm, ensure good interfacial effect, further improve electricity
The performance in pond.
（2）The present invention uses simple rolling methods, controls the pressure and speed of roll-in, before and after can effectively completing preliminary filling
The shaping and exhaust of diaphragm ensure diaphragm not fold, improve the contact surface of positive/negative plate and diaphragm, ensure good interface effect
Fruit is further ensured that the performance of battery.This method flow is simple, easy to operate, suitable for the optimization of volume production battery process.
（3）The present invention is based on lithium ion Soft Roll laminated batteries prepared by this kind of control method and the electricity for not carrying out roll-in shaping
Pond is more preferable compared to the contact interface between positive/negative plate and diaphragm, and nothing causes the dead lithium that folded region is deposited because of the phenomenon that diaphragm fold,
So as to give full play to the capacity of positive and negative pole material, improve battery performance.
Description of the drawings
In order that the present invention can be more clearly and readily understood, it is right below according to specific embodiment and with reference to attached drawing
The present invention is described in further detail, wherein
Fig. 1 is the embodiment of the present invention 1, the rolling equipment schematic diagram used in embodiment 2, embodiment 3；
Fig. 2 is roll-in and the cycle performance comparison diagram of the battery of non-roll-in under battery system of the same race.
Specific embodiment
（Embodiment 1）
See Fig. 1 and Fig. 2, a kind of control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold, including following step
Suddenly：
The first step：It is shelved after battery liquid-filling.Battery carries out 45 DEG C of high temperature after fluid injection, side seal is completed and shelves, and shelves the time for 24 hours,
Normal temperature shelf is then continued at, shelves the time for 24 hours, it is ensured that the abundant infiltration of pole piece.
Second step：Roll-in before battery preliminary filling.Roll-in is carried out to the battery after shelving by the way of transmission, adjusts roll-in
The pressure and speed of roll-in in journey, pressure 0.05MPa, roll-in speed 1m/s, when battery is put, bottom is parallel with pressure roller, tool
Body is with reference to shown in Fig. 1；
Third walks：Then preliminary filling is carried out to the battery for completing roll-in, the flow of preliminary filling and the lithium ion battery of industrialized production are pre-
It is consistent to fill flow, preliminary filling multiplying power is 0.01C, 0.05C, 0.1C, 0. 2C；
4th step：Portion gas can be generated with the generation of SEI films during preliminary filling, using secondary roll-in technique to diaphragm into
The further shaping of row and exhaust adjust the pressure and speed of roll-in in nipping process, pressure 0.1MPa, roll-in speed
0.5m/s directly carries out two envelopes, two envelope vacuum degrees≤- 90kPa, vacuum delay 3s after the completion of roll-in.
5th step：Remaining flow is consistent with the technique normally produced, and normal process flow is chemical conversion → partial volume → aging,
It is finally completed the making of finished battery.
（Embodiment 2）
The first step：It is shelved after battery liquid-filling.Battery carries out 45 DEG C of high temperature after fluid injection, side seal is completed and shelves, and shelves time 36h,
Normal temperature shelf is then continued at, shelves time 12h, it is ensured that the abundant infiltration of pole piece.
Second step：Roll-in before battery preliminary filling.Roll-in is carried out to the battery after shelving by the way of transmission, adjusts roll-in
The pressure and speed of roll-in in journey, pressure 0.3MPa, 2 m/s of roll-in speed, when battery is put, bottom is parallel with pressure roller, tool
Body is with reference to shown in Fig. 1；
Third walks：Then preliminary filling is carried out to the battery for completing roll-in, the flow of preliminary filling and the lithium ion battery of industrialized production are pre-
It is consistent to fill flow, preliminary filling multiplying power is 0.01C, 0.05C, 0.1C, 0. 2C；
4th step：Can portion gas be generated due to the generation of SEI films during preliminary filling, using secondary roll-in technique to diaphragm into
The further shaping of row and exhaust adjust the pressure and speed of roll-in in nipping process, pressure 0.2MPa, roll-in speed 1m/
S directly carries out two envelopes, two envelope vacuum degrees≤- 90kPa, vacuum delay 3s after the completion of roll-in.
5th step：Remaining flow is consistent with the technique normally produced, and normal process flow is chemical conversion → partial volume → aging,
It is finally completed the making of finished battery.
（Embodiment 3）
The first step：It is shelved after battery liquid-filling.Battery carries out 45 DEG C of high temperature after fluid injection, side seal is completed and shelves, and shelves time 36h,
Normal temperature shelf is then continued at, shelves the time for 24 hours, it is ensured that the abundant infiltration of pole piece.
Second step：Roll-in before battery preliminary filling.Roll-in is carried out to the battery after shelving by the way of transmission, adjusts roll-in
The pressure and speed of roll-in in journey, pressure 0.1MPa, 2 m/s of roll-in speed, when battery is put, bottom is parallel with pressure roller, tool
Body is with reference to shown in Fig. 1；
Third walks：Then preliminary filling is carried out to the battery for completing roll-in, the flow of preliminary filling and the lithium ion battery of industrialized production are pre-
It is consistent to fill flow, preliminary filling multiplying power is 0.01C, 0.05C, 0.1C, 0. 2C；
4th step：Can portion gas be generated due to the generation of SEI films during preliminary filling, using secondary roll-in technique to diaphragm into
The further shaping of row and exhaust adjust the pressure and speed of roll-in in nipping process, pressure 0.2MPa, roll-in speed 1m/
S directly carries out two envelopes, two envelope vacuum degrees≤- 90kPa, vacuum delay 3s after the completion of roll-in.
5th step：Remaining flow is consistent with the technique normally produced, and normal process flow is chemical conversion → partial volume → aging,
It is finally completed the making of finished battery.
A kind of control method for improving lithium ion Soft Roll laminated batteries diaphragm fold provided by the invention, this method are effective
The buckling phenomena of lithium ion Soft Roll laminated batteries is solved, improves the interface conditions of battery positive/negative plate and diaphragm, optimization is cell performance
Energy.
Particular embodiments described above has carried out the purpose of the present invention, technical solution and advantageous effect further in detail
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the present invention
Within the scope of shield.
Claims (9)
1. a kind of control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold, which is characterized in that including following
Step：
（1）Battery carries out high temperature after fluid injection is completed and shelves, then by normal temperature shelf, it is ensured that electrolyte fully infiltrates pole piece；
（2）Roll-in is carried out to the battery after shelving by the way of transmission, the pressure and speed of roll-in are controlled in nipping process, is protected
The diaphragm of card fold obtains shaping, side by side except gas between pole piece；
（3）Then preliminary filling, the flow of preliminary filling and the pre-charging lithium ion batteries stream of industrialized production are carried out to the battery for completing roll-in
Journey is consistent；
（4）Gas can be generated during SEI films are formed during preliminary filling, using the technique of secondary roll-in to diaphragm into traveling
The shaping and exhaust of one step control the pressure and speed of roll-in, then complete two envelopes of battery after roll-in；
（5）Remaining flow is consistent with the technique normally produced, is finally completed the making of finished battery.
2. the control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold according to claim 1, special
Sign is：The step（2）In, the pressure of roll-in before preliminary filling is controlled in 0.05MPa~0.3MPa.
3. the control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold according to claim 1, special
Sign is：The step（2）In, the speed control of roll-in is in the m/s of 0.5 m/s~2 before preliminary filling.
4. the control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold according to claim 1, special
Sign is：The step（4）In, the pressure of roll-in after preliminary filling is controlled in 0.05MPa~0.3MPa.
5. the control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold according to claim 1, special
Sign is：The step（4）In, the speed control of roll-in is in the m/s of 0.5 m/s~2 after preliminary filling.
6. the control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold according to claim 1, special
Sign is：The step（1）In, 45 DEG C of high temperature shelves the time as 24~36h after fluid injection, the normal temperature shelf time for 12~for 24 hours.
7. the control method of the improvement lithium ion Soft Roll laminated batteries diaphragm fold according to claim 1, feature exist
In：The step（3）In, the rate of charge of preliminary filling is 0.01C, 0.05C, 0.1C or 0. 2C.
8. the control method of the improvement lithium ion Soft Roll laminated batteries diaphragm fold according to claim 1, feature exist
In：The step（4）In, the vacuum degree of two envelopes is≤- 90kPa, and vacuum delay is 3~5s.
9. the control method of the improvement lithium ion Soft Roll laminated batteries diaphragm fold according to claim 1, feature exist
In：In the step (5), normal process flow is：Chemical conversion → partial volume → aging.
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| CN201711318301.9A CN108155424A (en) | 2017-12-12 | 2017-12-12 | A kind of control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold |
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| CN201711318301.9A CN108155424A (en) | 2017-12-12 | 2017-12-12 | A kind of control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold |
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Family
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109037815A (en) * | 2018-09-21 | 2018-12-18 | 合肥国轩高科动力能源有限公司 | Formation method of lithium iron phosphate battery |
| CN109326827A (en) * | 2018-10-15 | 2019-02-12 | 珠海光宇电池有限公司 | A kind of standing method after lithium ion battery liquid injection |
| CN109638370A (en) * | 2018-12-19 | 2019-04-16 | 合肥国轩高科动力能源有限公司 | Formation method of soft package lithium ion battery |
| CN109687049A (en) * | 2018-12-19 | 2019-04-26 | 江苏卡耐新能源有限公司 | A method of improving flexible packing lithium ion battery diaphragm fold |
| CN110571476A (en) * | 2019-09-18 | 2019-12-13 | 河南锂动电源有限公司 | preparation method of nickel cobalt lithium manganate laminated soft-package battery and battery |
| CN111342140A (en) * | 2020-03-09 | 2020-06-26 | 天津市捷威动力工业有限公司 | Method and device for improving dry-process diaphragm fold of lithium ion soft package laminated battery |
| CN111342139A (en) * | 2020-03-09 | 2020-06-26 | 天津市捷威动力工业有限公司 | Soft package battery interface improving method |
| CN111584964A (en) * | 2020-05-29 | 2020-08-25 | 郑州中科新兴产业技术研究院 | Formation process of power battery with high specific property |
| CN112350027A (en) * | 2020-10-28 | 2021-02-09 | 双登集团股份有限公司 | Method for solving dry-method diaphragm wrinkling problem of soft-package lithium ion battery |
| CN112366348A (en) * | 2019-12-17 | 2021-02-12 | 万向一二三股份公司 | Sectional formation method for high-nickel ternary soft-package power lithium battery |
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| CN101794914A (en) * | 2009-08-05 | 2010-08-04 | 江西中投新能源有限公司 | Method for manufacturing high-capacity lithium battery with long service life |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109037815A (en) * | 2018-09-21 | 2018-12-18 | 合肥国轩高科动力能源有限公司 | Formation method of lithium iron phosphate battery |
| CN109326827A (en) * | 2018-10-15 | 2019-02-12 | 珠海光宇电池有限公司 | A kind of standing method after lithium ion battery liquid injection |
| CN109326827B (en) * | 2018-10-15 | 2021-05-11 | 珠海冠宇电池股份有限公司 | Standing method of lithium ion battery after liquid injection |
| CN109638370A (en) * | 2018-12-19 | 2019-04-16 | 合肥国轩高科动力能源有限公司 | Formation method of soft package lithium ion battery |
| CN109687049A (en) * | 2018-12-19 | 2019-04-26 | 江苏卡耐新能源有限公司 | A method of improving flexible packing lithium ion battery diaphragm fold |
| CN110571476A (en) * | 2019-09-18 | 2019-12-13 | 河南锂动电源有限公司 | preparation method of nickel cobalt lithium manganate laminated soft-package battery and battery |
| CN110571476B (en) * | 2019-09-18 | 2022-07-29 | 河南锂动电源有限公司 | Preparation method of nickel cobalt lithium manganate laminated soft-package battery and battery |
| CN112366348A (en) * | 2019-12-17 | 2021-02-12 | 万向一二三股份公司 | Sectional formation method for high-nickel ternary soft-package power lithium battery |
| CN112366348B (en) * | 2019-12-17 | 2022-04-12 | 万向一二三股份公司 | Sectional formation method for high-nickel ternary soft-package power lithium battery |
| CN111342139A (en) * | 2020-03-09 | 2020-06-26 | 天津市捷威动力工业有限公司 | Soft package battery interface improving method |
| CN111342140A (en) * | 2020-03-09 | 2020-06-26 | 天津市捷威动力工业有限公司 | Method and device for improving dry-process diaphragm fold of lithium ion soft package laminated battery |
| CN111584964A (en) * | 2020-05-29 | 2020-08-25 | 郑州中科新兴产业技术研究院 | Formation process of power battery with high specific property |
| CN111584964B (en) * | 2020-05-29 | 2021-07-30 | 郑州中科新兴产业技术研究院 | Formation process of power battery with high specific property |
| CN112350027A (en) * | 2020-10-28 | 2021-02-09 | 双登集团股份有限公司 | Method for solving dry-method diaphragm wrinkling problem of soft-package lithium ion battery |
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