CN104810561A - Preparation method of lithium-ion power battery cell - Google Patents
Preparation method of lithium-ion power battery cell Download PDFInfo
- Publication number
- CN104810561A CN104810561A CN201410102684.6A CN201410102684A CN104810561A CN 104810561 A CN104810561 A CN 104810561A CN 201410102684 A CN201410102684 A CN 201410102684A CN 104810561 A CN104810561 A CN 104810561A
- Authority
- CN
- China
- Prior art keywords
- positive
- negative
- preparation
- barrier film
- negative plate
- 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.)
- Granted
Links
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
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound 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
-
- 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)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a preparation method of a lithium-ion power battery cell. The lithium-ion power battery cell comprises two or more positive plates, diaphragms and two or more negative plates, the diaphragm is arranged between each two adjacent positive plates, the positive plates the diaphragms are overlapped to form a positive plate unit, the diaphragm is arranged between each two adjacent negative plates, the negative plates and the diaphragms are overlapped to form a negative plate unit, the middle and two sides of each one of the positive plate unit and the negative plate unit are respectively provided with the diaphragms, and the cell is prepared by winding. Through the overlapping-winding combined cell preparation method, overlapping advantages of small cell internal resistance, good heavy load discharging performances and low multiplying power discharging temperature rising are obtained. The cell is prepared by winding so that the problem that in cycle, the pole plate edge bulges seriously.
Description
Technical field
The present invention relates to lithium-ion-power cell and manufacture field, especially relate to a kind of preparation method of electric core of lithium ion power battery.
Background technology
It is high that lithium-ion-power cell has voltage, and energy density is large, good cycle, the advantages such as self discharge is little, memory-less effect, and operating temperature range is wide.
The structure of general lithium-ion-power cell mainly can be divided into two large classes: 1, with Z-shaped laminar, and by multi-disc positive plate, barrier film, multi-disc negative plate are alternate and the battery core that formed, then connect outside terminal, put into aluminum plastic film, make battery.2, with coiling form, a positive plate, barrier film, a negative plate winding are made battery core, then connects outside terminal, put into aluminum plastic film or duricrust, make battery.The battery adopting Z-shaped lamination process to make, the advantage such as have that the internal resistance of cell is little, good heavy current, multiplying power discharging temperature rise are low, but exist production efficiency low, be not suitable for pole piece edge in duricrust battery, cyclic process and play the shortcomings such as drum is more serious.The battery adopting winding method to make, has the advantages such as production efficiency is high, cyclic process pole piece stable, cell applicability is strong, but there is the shortcomings such as the internal resistance of cell is high, heavy-current discharge performance is poor, multiplying power discharging temperature rise is high.
In patent CN102208679A, by staying white mode at positive and negative electrode pole piece bending part, adopting multi pole ears mode simultaneously, adopting winding method to make lithium-ion-power cell.The battery adopting the method to make while enhancing productivity, can take into account heavy-current discharge; But have that pole piece stays that white dimension control is more difficult, a shortcoming of blank space collector cracky in winding process.
Summary of the invention
The present invention is to overcome above-mentioned the deficiencies in the prior art part, provides the preparation method that a kind of internal resistance is little, edge plays the unconspicuous electric core of lithium ion power battery of drum.
To achieve these goals, the present invention is by the following technical solutions:
A kind of preparation method of electric core of lithium ion power battery, battery core is made up of positive plate, barrier film, negative plate, battery core comprises the positive plate of more than 2 and 2, barrier film is provided with between adjacent positive sheet, lamination forms positive plate group, battery core comprises the negative plate of more than 2 and 2, is provided with barrier film between adjacent cathode sheet, and lamination forms negative plate group; The centre of positive plate group and negative plate group and both sides arrange one deck barrier film more respectively, and winding is made into battery core.
The present invention adopts lamination to reel the battery core production method combined, possess that the internal resistance of cell is little, lamination advantage that good heavy current, multiplying power discharging temperature rise are low, be made into battery core through winding method simultaneously, solve pole piece edge in cyclic process and play the more serious shortcoming of drum.In addition, the battery core be wound into after multiple pole piece is stacked, because the length of single pole piece can be shorter, therefore this structure can be suitable for the battery core of larger volume, so the electric core of lithium ion power battery that the present invention makes is adapted to Soft Roll and the multiple kind battery of duricrust, enhance technology versatility.
As preferably, barrier film grows positive plate both sides of the edge 0.3mm ~ 1.5mm, and barrier film grows negative plate both sides of the edge 0.3mm ~ 1.5mm.Control membrane tension, barrier film and positive and negative plate Edge Distance, slow down pole piece edge in cyclic process and play bulging degree.
As preferably, described positive and negative plate adopts punching mode to be made.
As preferably, the lug direction of all positive plates is same direction, is welded as a whole; The lug direction of all negative plates is same direction, is welded as a whole.
As preferably, the lug direction of positive plate and the lug direction of negative plate are same direction.
As preferably, the lug direction of positive plate and the lug direction of negative plate are rightabout.
Beneficial effect:
(1) adopt spooled laminations mode to make lithium-ion-power cell, can significantly enhance productivity.
(2) adopt the battery that this mode makes, the internal resistance of cell is low, and meet large multiplying power discharging requirement, multiplying power discharging temperature rise is low.
(3) by spooled laminations mode, control membrane tension, barrier film and positive and negative plate Edge Distance, slow down pole piece edge in cyclic process and play bulging degree.
(4) adopt spooled laminations mode to make lithium-ion-power cell, Soft Roll and the multiple kind battery of duricrust can be adapted to, enhance technology versatility.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1:
Prepare positive plate: the LiFePO4 (LiFePO mixing 90 weight portions
4), the conductive black SP of 4 weight portions, the carbon phase grown carbon fiber (VGCF) of 1 weight portion, and 5 Kynoar of weight portion, and the N-N dimethyl pyrrolidone adding 85 weight portions stirs formation slurries, be coated on positive pole base flow body rolling aluminum foil uniformly, after drying with roller carry out rolling, punching, make positive plate.
Prepare negative plate: the Delanium mixing 95 weight portions, the conductive black SP of 1 weight portion, the sodium carboxymethylcellulose (CMC) of 1.5 weight portions and the butadiene-styrene rubber (SBR) of 2.5 weight portions, and the deionized water and stirring of adding 150 weight portions forms slurries, be coated on negative pole base flow body electrolytic copper foil uniformly, after drying with roller carry out rolling, punching, make negative plate.
Prepare barrier film: barrier film employing thickness is the polypropylene screen (PP) of 30 microns, air permeability 280 cm
3/ sec, porosity 42%.
Prepare electrolyte: electrolyte adopts the lithium hexafluoro phosphate of 1.3mol/L to be dissolved in the ORGANIC SOLVENT MIXTURES of dimethyl carbonate, methyl ethyl carbonate, ethylene carbonate, propylene carbonate ester, and wherein the volume ratio of dimethyl carbonate, methyl ethyl carbonate, ethylene carbonate, propylene carbonate ester is (40:40:13:7).
Prepare shell: shell adopts aluminum plastic film, aluminum plastic film employing thickness is 152 microns and has nylon layer, tack coat, PP layer, tack coat, aluminium foil, tack coat, PP shape sandwich layer by layer.
Prepare battery: select 3 above-mentioned positive plates, be provided with barrier film between adjacent positive sheet, lamination forms positive plate group.Select 3 above-mentioned negative plates, be provided with barrier film between adjacent cathode sheet, lamination forms negative plate group; The centre of positive plate group and negative plate group and both sides arrange one deck barrier film more respectively, and then winding is made into battery core.Barrier film grows positive plate both sides of the edge 0.3mm, and barrier film grows negative plate both sides of the edge 0.3mm.The lug direction of all positive plates is same direction, is welded as a whole; The lug direction of all negative plates is same direction, is welded as a whole.The lug direction of positive plate and the lug direction of negative plate are same direction.Then carry out aluminum plastic film heat-sealing, inject electrolyte, heat-sealing sealing; Carry out shelving successively-preliminary filling--partial volume of finding time-change into, make 20Ah lithium-ion-power cell.
Embodiment 2:
The preparation method identical with embodiment 1 is adopted to prepare positive plate, negative plate, barrier film, electrolyte, shell.
Prepare battery: select 2 above-mentioned positive plates, be provided with barrier film between adjacent positive sheet, lamination forms positive plate group.Select 2 above-mentioned negative plates, be provided with barrier film between adjacent cathode sheet, lamination forms negative plate group; The centre of positive plate group and negative plate group and both sides arrange one deck barrier film more respectively, and winding is made into battery core.Barrier film grows positive plate both sides of the edge 1.5mm, and barrier film grows negative plate both sides of the edge 1.5mm.The lug direction of all positive plates is same direction, is welded as a whole; The lug direction of all negative plates is same direction, is welded as a whole.The lug direction of positive plate and the lug direction of negative plate are rightabout.Then carry out aluminum plastic film heat-sealing, inject electrolyte, heat-sealing sealing; Carry out shelving successively-preliminary filling--partial volume of finding time-change into, make 20Ah lithium-ion-power cell.
Comparative example 1:
The preparation method identical with embodiment 1 is adopted to prepare positive plate, negative plate, barrier film, electrolyte, shell.
Prepare battery: select 3 above-mentioned positive plates, 3 above-mentioned negative plates, with Z-shaped laminar, positive plate, barrier film, the alternate lamination of negative plate are formed battery core, soldering polar ear, and positive and negative lug is equidirectional; Then carry out aluminum plastic film heat-sealing, inject electrolyte, heat-sealing sealing; Carry out shelving successively-preliminary filling--partial volume of finding time-change into, make 20Ah lithium-ion-power cell.
Comparative example 2:
The preparation method identical with embodiment 1 is adopted to prepare positive plate, negative plate, barrier film, electrolyte, shell.
Prepare battery: select the above-mentioned positive plate of monolithic, the above-mentioned negative plate of monolithic, in convoluted mode, positive plate, barrier film, the alternate winding of negative plate are formed battery core, and positive and negative lug is equidirectional; Then carry out aluminum plastic film heat-sealing, inject electrolyte, sealing; Carry out shelving successively-preliminary filling--partial volume of finding time-change into, make 20Ah lithium-ion-power cell.
Table 1 is the battery core production efficiency of above-mentioned comparative example and above-described embodiment, battery AC internal Resistance, multiplying power discharging capability retention, the temperature rise of multiplying power discharging battery, circulating battery play bulging degree comparing result.
Claims (6)
1. the preparation method of an electric core of lithium ion power battery, battery core is made up of positive plate, barrier film, negative plate, it is characterized in that, battery core comprises the positive plate of more than 2 and 2, be provided with barrier film between adjacent positive sheet, lamination forms positive plate group, and battery core comprises the negative plate of more than 2 and 2, be provided with barrier film between adjacent cathode sheet, lamination forms negative plate group; The centre of positive plate group and negative plate group and both sides arrange one deck barrier film more respectively, and winding is made into battery core.
2. the preparation method of a kind of electric core of lithium ion power battery according to claim 1, is characterized in that, barrier film grows positive plate both sides of the edge 0.3mm ~ 1.5mm, and barrier film grows negative plate both sides of the edge 0.3mm ~ 1.5mm.
3. the preparation method of a kind of electric core of lithium ion power battery according to claim 1, is characterized in that, described positive and negative plate adopts punching mode to be made.
4. the preparation method of a kind of electric core of lithium ion power battery according to claim 1, is characterized in that, the lug direction of all positive plates is same direction, is welded as a whole; The lug direction of all negative plates is same direction, is welded as a whole.
5. the preparation method of a kind of electric core of lithium ion power battery according to claim 4, is characterized in that, the lug direction of positive plate and the lug direction of negative plate are same direction.
6. the preparation method of a kind of electric core of lithium ion power battery according to claim 4, is characterized in that, the lug direction of positive plate and the lug direction of negative plate are rightabout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102684.6A CN104810561B (en) | 2014-03-20 | 2014-03-20 | A kind of preparation method of electric core of lithium ion power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102684.6A CN104810561B (en) | 2014-03-20 | 2014-03-20 | A kind of preparation method of electric core of lithium ion power battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104810561A true CN104810561A (en) | 2015-07-29 |
| CN104810561B CN104810561B (en) | 2018-06-19 |
Family
ID=53695204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410102684.6A Active CN104810561B (en) | 2014-03-20 | 2014-03-20 | A kind of preparation method of electric core of lithium ion power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104810561B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11978844B2 (en) | 2020-06-02 | 2024-05-07 | Contemporary Amperex Technology Co., Limited | Electrode assembly and related battery, battery module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540792A (en) * | 2003-10-31 | 2004-10-27 | 中信国安盟固利电源技术有限公司 | Method for making core of soft packaged lithium ion dynamic battery |
| CN101867058A (en) * | 2010-07-09 | 2010-10-20 | 湖南科霸汽车动力电池有限责任公司 | Manufacturing method for electric core |
| CN102208679A (en) * | 2011-05-09 | 2011-10-05 | 上海唐一新能源科技有限公司 | Wound continuous laminated square lithium ion power battery |
| CN102231433A (en) * | 2011-05-25 | 2011-11-02 | 万向电动汽车有限公司 | Lithium ion battery |
| CN102361068A (en) * | 2011-10-24 | 2012-02-22 | 深圳市格瑞普电池有限公司 | Pole piece for lithium ion battery, laminated lithium ion battery and preparation method of laminated lithium ion battery |
-
2014
- 2014-03-20 CN CN201410102684.6A patent/CN104810561B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540792A (en) * | 2003-10-31 | 2004-10-27 | 中信国安盟固利电源技术有限公司 | Method for making core of soft packaged lithium ion dynamic battery |
| CN101867058A (en) * | 2010-07-09 | 2010-10-20 | 湖南科霸汽车动力电池有限责任公司 | Manufacturing method for electric core |
| CN102208679A (en) * | 2011-05-09 | 2011-10-05 | 上海唐一新能源科技有限公司 | Wound continuous laminated square lithium ion power battery |
| CN102231433A (en) * | 2011-05-25 | 2011-11-02 | 万向电动汽车有限公司 | Lithium ion battery |
| CN102361068A (en) * | 2011-10-24 | 2012-02-22 | 深圳市格瑞普电池有限公司 | Pole piece for lithium ion battery, laminated lithium ion battery and preparation method of laminated lithium ion battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11978844B2 (en) | 2020-06-02 | 2024-05-07 | Contemporary Amperex Technology Co., Limited | Electrode assembly and related battery, battery module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104810561B (en) | 2018-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201397857Y (en) | Dynamic lithium ion battery with heat dissipation performance | |
| CN207320232U (en) | A kind of lithium ion battery negative electrode and lithium ion battery | |
| CN207611809U (en) | A kind of anode slice of lithium ion battery and lithium ion battery | |
| CN102800841B (en) | Negative plate, lithium ion battery and preparation method thereof | |
| CN207572477U (en) | Electrode assembly and secondary cell | |
| CN101656330A (en) | Method for manufacturing lithium ion battery cell | |
| CN210837995U (en) | High-safety high-capacity lithium ion battery lamination cell | |
| CN105406131A (en) | Capacitive type lithium-ion power battery with hybrid negative electrode plates | |
| CN105551816A (en) | Positive plate of hybrid super capacitor and preparation method of positive plate and hybrid super capacitor | |
| CN105406055A (en) | Capacitive type nickel-cobalt-manganese ternary material lithium ion battery | |
| CN105742721A (en) | High-energy-ratio low-internal-resistance cylindrical lithium ion battery | |
| CN112563579A (en) | High-safety high-capacity lithium ion battery laminated cell and preparation method thereof | |
| CN210744083U (en) | Cylindrical lithium battery and parallel winding core thereof | |
| CN109065839A (en) | A kind of full tab positive plate, winding battery core and preparation method thereof | |
| CN103066321B (en) | Large capacity high magnification type Soft Roll ferric phosphate lithium cell | |
| CN208336372U (en) | Electrode plates, electrode assembly and secondary cell | |
| CN103474621A (en) | Pole piece and laminated electrical core body for lithium ion battery | |
| CN203774413U (en) | Polymer lithium ion battery cell structure | |
| CN109888162A (en) | Have gluing structure battery core of embedded tab and preparation method thereof and lithium battery | |
| CN102315412A (en) | Lithium ion power battery pole group | |
| CN205429091U (en) | Mixed negative pole pole piece lithium ion power batteries of electric capacity type | |
| CN203774408U (en) | Power energy-storage polymer lithium ion battery | |
| CN116344961A (en) | Diaphragm-free battery cell, preparation method thereof and lithium ion battery | |
| CN110600285A (en) | Lithium separation-free pre-lithium intercalation method for cathode of lithium ion electrochemical energy storage device | |
| CN104810561B (en) | A kind of preparation method of electric core of lithium ion power battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang District, No. two road, building No. 855, No. Applicant after: Wanxiang 123 Co Ltd Applicant after: Wanxiang Electric Vehicle Co., Ltd. Applicant after: Wanxiang Group Corporation Address before: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No. Applicant before: Universal A 1 System Co., Ltd Applicant before: Wanxiang Electric Vehicle Co., Ltd. Applicant before: Wanxiang Group Corporation |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211109 Address after: No.855, Jianshe 2nd Road, Xiaoshan Economic and Technological Development Zone, Hangzhou City, Zhejiang Province Patentee after: Wanxiang A123 Co.,Ltd. Address before: No.855, Jianshe 2nd Road, Xiaoshan Economic and Technological Development Zone, Hangzhou City, Zhejiang Province Patentee before: Wanxiang A123 Co.,Ltd. Patentee before: WANXIANG EV Co.,Ltd. Patentee before: WANXIANG GROUP Co.,Ltd. |