CN106469805A - A kind of raising winding type battery pole piece caking property and flexible method - Google Patents
A kind of raising winding type battery pole piece caking property and flexible method Download PDFInfo
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- CN106469805A CN106469805A CN201510505751.3A CN201510505751A CN106469805A CN 106469805 A CN106469805 A CN 106469805A CN 201510505751 A CN201510505751 A CN 201510505751A CN 106469805 A CN106469805 A CN 106469805A
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- Prior art keywords
- pole piece
- type battery
- winding type
- caking property
- flexible method
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
-
- 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
Abstract
The present invention proposes a kind of raising winding type battery pole piece caking property and flexible method, comprises the following steps：First, pole piece is preheated；2nd, pole piece is carried out heat roll-in；3rd, pole piece is lowered the temperature.The feature based on binding agent itself for the present invention, find out a kind of technique taking differentiation hot-rolling pressure for the different composition of electrode plates and characteristic, greatly improve caking property and the pliability of electrode plates, and the test having obtained putting into practice proves, there is very strong realistic meaning, be that winding type battery provides a kind of reliable process to high power capacity development.
Description
Technical field
The present invention relates to the improvement of vehicle-mounted lithium ion cell electrode performance, belong to technical field of new energy,
Specifically a kind of raising winding type battery pole piece caking property and flexible method.
Background technology
With electric automobile to vehicle power lithium ion battery energy density continual high request, lithium from
Sub- battery is in system, shape, size also constantly diversified and intensive.Dimensionally, limited
Space in load more energy, this is accomplished by constantly improving thickness of electrode.But thing followed contradiction
Problem is：Thickness of electrode is bigger, and the hardness of electrode is higher, and pliability is poorer, in winding type battery molding
The problems such as easily part in journey, the pliability how improving electrode becomes of raising battery energy density
Bottleneck technique.
At present, improve the flexible method of electrode is to improve the containing of binding agent () in electrode taking PVDF as a example
Amount, but this method is with the electric conductivity of sacrificial electrode as cost, its result be exactly compromise battery times
Rate performance, increases the polarization resistance of battery, and that is, battery has than larger temperature rise under discharge scenario.
In terms of improving winding type battery energy density, in initial winding process, electrode plates are after baking
Its fragility larger it is easy to fracture, therefore very big difficulty is brought to the raising of battery performance.Therefore,
How to improve the caking property of electrode and pliability becomes the difficult problem that exploitation high power capacity winding type battery has to capture
One of technique.
Content of the invention
The present invention proposes a kind of raising winding type battery pole piece caking property and flexible method, solves existing
The problem being difficult to improve because of the battery energy density of electrode plates caking property and pliability difference band in technology.
The technical scheme is that and be achieved in that：
A kind of raising winding type battery pole piece caking property and flexible method, comprise the following steps：
First, pole piece is preheated；
2nd, pole piece is carried out heat roll-in；
3rd, pole piece is lowered the temperature.
Further, in described step 2, the pressure of roll-in is 10-20MPa, and roll-in speed is 5-30m/min.
Further, described pole piece is anode pole piece, and the heating-up temperature in described step 2 is 80 DEG C～120 DEG C.
Further, the preheating temperature in described step one is 80 DEG C, and the heating-up temperature in described step 2 is
110℃.
Further, the proportioning of described anode pole piece is NCM:SP:KS-6:PVDF=95:1:1.5:2.5.
Further, described pole piece is cathode pole piece, and the heating-up temperature in described step 2 is 90 DEG C～120 DEG C.
Further, the proportioning of described cathode pole piece is C:CMC:SP:SBR=95.3:1.2:1:2.5.
Beneficial effects of the present invention are：
The feature based on binding agent itself for the present invention, has found out a kind of for the different composition of electrode plates and special
Property take the technique of differentiation hot-rolling pressure, greatly improve caking property and the pliability of electrode plates, and
Test to practice proves there is very strong realistic meaning, and developing to high power capacity for winding type battery provides
A kind of reliable process.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
Example or description of the prior art in required use accompanying drawing be briefly described it should be apparent that, below describe
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 improves winding type battery pole piece caking property and flexible method flow diagram for the present invention；
Fig. 2 is using different roll-in mode cycle performance of battery comparison diagrams.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, it is fully described by it is clear that described embodiment is only a part of embodiment of the present invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
Property work under the premise of the every other embodiment that obtained, broadly fall into the scope of protection of the invention.
Raising winding type battery pole piece caking property in the present embodiment and flexible method, with 2.6Ah 18650
As a example lithium ion battery, the proportioning of anode pole piece is NCM:SP:KS-6:PVDF=95:1:1.5:2.5；Negative pole pole
The proportioning of piece is C:CMC:SP:SBR=95.3:1.2:1:2.5.
Embodiment 1
Referring to Fig. 1, anode pole piece is processed, step is as follows：
First, anode pole piece is carried out with 80 DEG C of preheatings.
2nd, anode pole piece is carried out heat roll-in, heating-up temperature is 110 DEG C, the pressure of roll-in is 10MPa,
Roll-in speed is 25m/min.
3rd, anode pole piece is lowered the temperature.
Embodiment 2
Anode pole piece is processed, step is as follows：
First, anode pole piece is carried out with 80 DEG C of preheatings.
2nd, anode pole piece is carried out heat roll-in, heating-up temperature is 80 DEG C, the pressure of roll-in is 15MPa,
Roll-in speed is 5m/min.
3rd, anode pole piece is lowered the temperature.
Embodiment 3
Anode pole piece is processed, step is as follows：
First, anode pole piece is carried out with 80 DEG C of preheatings.
2nd, anode pole piece is carried out heat roll-in, heating-up temperature is 120 DEG C, the pressure of roll-in is 18MPa,
Roll-in speed is 30m/min.
3rd, anode pole piece is lowered the temperature.
Embodiment 4
Anode pole piece is processed, step is as follows：
First, anode pole piece is carried out with 80 DEG C of preheatings.
2nd, anode pole piece is carried out heat roll-in, heating-up temperature is 95 DEG C, the pressure of roll-in is 20MPa,
Roll-in speed is 15m/min.
3rd, anode pole piece is lowered the temperature.
Embodiment 5
Cathode pole piece is processed, step is as follows：
First, cathode pole piece is carried out with 90 DEG C of preheatings.
2nd, cathode pole piece is carried out heat roll-in, heating-up temperature is 110 DEG C, the pressure of roll-in is 10MPa,
Roll-in speed is 25m/min.
3rd, cathode pole piece is lowered the temperature.
Embodiment 6
Cathode pole piece is processed, step is as follows：
First, cathode pole piece is carried out with 90 DEG C of preheatings.
2nd, cathode pole piece is carried out heat roll-in, heating-up temperature is 90 DEG C, the pressure of roll-in is 15MPa,
Roll-in speed is 5m/min.
3rd, cathode pole piece is lowered the temperature.
Embodiment 7
Cathode pole piece is processed, step is as follows：
First, cathode pole piece is carried out with 90 DEG C of preheatings.
2nd, cathode pole piece is carried out heat roll-in, heating-up temperature is 120 DEG C, the pressure of roll-in is 18MPa,
Roll-in speed is 30m/min.
3rd, cathode pole piece is lowered the temperature.
Embodiment 8
Cathode pole piece is processed, step is as follows：
First, cathode pole piece is carried out with 90 DEG C of preheatings.
2nd, cathode pole piece is carried out heat roll-in, heating-up temperature is 100 DEG C, the pressure of roll-in is 20MPa,
Roll-in speed is 15m/min.
3rd, cathode pole piece is lowered the temperature.
Carry out performance test below taking the sample in embodiment 1 as a example：
1st, by the anode pole piece obtaining in embodiment 1 with do not carry out the cathode pole piece of hot-rolling pressure by 18650 techniques
It is prepared into 2.6Ah battery, carries out preliminary filling, chemical conversion, obtain hot-rolling pressure-like product.
2nd, by the anode pole piece not carrying out hot-rolling pressure and the cathode pole piece not carrying out hot-rolling pressure by 18650 technique systems
Standby one-tenth 2.6Ah battery, carries out preliminary filling, chemical conversion, obtains standard specimen sample.
3rd, battery sample and reference sample are carried out with 25 DEG C, the loop test of 0.5C charging 1C multiplying power discharging.
Referring to Fig. 2, transverse axis is cycle-index to test result, and the longitudinal axis is discharge capacity, and result shows and adopts hot-rolling
The cycle performance of the battery of pole pressure piece is better than the battery being provided without hot-rolling pole pressure piece.
With being provided without hot-rolling pole pressure piece, caking property centrifugation peel test is carried out to hot-rolling pole pressure piece, result shows adopts
The electrode plates being provided without hot-rolling pressure to be substantially better than with the caking property of the electrode plates of hot-rolling pressure.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement made etc., should be included in this
Within bright protection domain.
Claims (7)
1. a kind of improve winding type battery pole piece caking property and flexible method it is characterised in that include with
Lower step：
First, pole piece is preheated；
2nd, pole piece is carried out heat roll-in；
3rd, pole piece is lowered the temperature.
2. a kind of raising winding type battery pole piece caking property as claimed in claim 1 and flexible method,
It is characterized in that, in described step 2, the pressure of roll-in is 10-20MPa, and roll-in speed is 5-30m/min.
3. a kind of raising winding type battery pole piece caking property as claimed in claim 2 and flexible method,
It is characterized in that, described pole piece is anode pole piece, and the heating-up temperature in described step 2 is 80 DEG C～120 DEG C.
4. a kind of raising winding type battery pole piece caking property as claimed in claim 3 and flexible method,
It is characterized in that, the preheating temperature in described step one is 80 DEG C, and the heating-up temperature in described step 2 is 110
℃.
5. a kind of raising winding type battery pole piece caking property as claimed in claim 4 and flexible method,
It is characterized in that, the proportioning of described anode pole piece is NCM:SP:KS-6:PVDF=95:1:1.5:2.5.
6. a kind of raising winding type battery pole piece caking property as claimed in claim 2 and flexible method,
It is characterized in that, described pole piece is cathode pole piece, and the heating-up temperature in described step 2 is 90 DEG C～120 DEG C.
7. a kind of raising winding type battery pole piece caking property as claimed in claim 6 and flexible method,
It is characterized in that, the proportioning of described cathode pole piece is C:CMC:SP:SBR=95.3:1.2:1:2.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510505751.3A CN106469805A (en) | 2015-08-17 | 2015-08-17 | A kind of raising winding type battery pole piece caking property and flexible method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510505751.3A CN106469805A (en) | 2015-08-17 | 2015-08-17 | A kind of raising winding type battery pole piece caking property and flexible method |
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| CN106469805A true CN106469805A (en) | 2017-03-01 |
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| CN201510505751.3A Pending CN106469805A (en) | 2015-08-17 | 2015-08-17 | A kind of raising winding type battery pole piece caking property and flexible method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658139A (en) * | 2017-10-16 | 2018-02-02 | 池州市修典新能源科技有限公司 | A kind of lithium electric capacity negative electrode and preparation method thereof |
| CN110289393A (en) * | 2019-07-26 | 2019-09-27 | 昆山聚创新能源科技有限公司 | Lithium battery cathode pole piece and preparation method thereof |
| CN111048738A (en) * | 2019-12-21 | 2020-04-21 | 北京理工大学 | Preparation method of battery pole piece capable of improving battery performance |
| CN112018323A (en) * | 2020-08-13 | 2020-12-01 | 华中科技大学 | Lithium ion battery pole piece and preparation method thereof |
| CN112768631A (en) * | 2021-01-07 | 2021-05-07 | 上海兰钧新能源科技有限公司 | Battery pole piece and embossing and rolling process thereof |
| CN113594551A (en) * | 2021-07-20 | 2021-11-02 | 山西中泽聚能新能源有限公司 | Preparation method of low-temperature-resistant lithium ion battery |
-
2015
- 2015-08-17 CN CN201510505751.3A patent/CN106469805A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658139A (en) * | 2017-10-16 | 2018-02-02 | 池州市修典新能源科技有限公司 | A kind of lithium electric capacity negative electrode and preparation method thereof |
| CN110289393A (en) * | 2019-07-26 | 2019-09-27 | 昆山聚创新能源科技有限公司 | Lithium battery cathode pole piece and preparation method thereof |
| CN111048738A (en) * | 2019-12-21 | 2020-04-21 | 北京理工大学 | Preparation method of battery pole piece capable of improving battery performance |
| CN111048738B (en) * | 2019-12-21 | 2021-06-15 | 北京理工大学 | Preparation method of battery pole piece capable of improving battery performance |
| CN112018323A (en) * | 2020-08-13 | 2020-12-01 | 华中科技大学 | Lithium ion battery pole piece and preparation method thereof |
| CN112768631A (en) * | 2021-01-07 | 2021-05-07 | 上海兰钧新能源科技有限公司 | Battery pole piece and embossing and rolling process thereof |
| CN113594551A (en) * | 2021-07-20 | 2021-11-02 | 山西中泽聚能新能源有限公司 | Preparation method of low-temperature-resistant lithium ion battery |
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