CN102751535A - Method for preparing high-capacity lithium iron phosphate lithium ion battery for automobile - Google Patents
Method for preparing high-capacity lithium iron phosphate lithium ion battery for automobile Download PDFInfo
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- CN102751535A CN102751535A CN2012102371064A CN201210237106A CN102751535A CN 102751535 A CN102751535 A CN 102751535A CN 2012102371064 A CN2012102371064 A CN 2012102371064A CN 201210237106 A CN201210237106 A CN 201210237106A CN 102751535 A CN102751535 A CN 102751535A
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- 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
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- 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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Abstract
The invention relates to a method for preparing a high-capacity lithium iron phosphate lithium ion battery for an automobile. The method comprises the steps of: (1) preparing a positive pole plate of the battery; (2) preparing a battery cell by carrying out drying, rolling, slitting and die cutting on the positive pole plate and superposing the positive pole plate with a negative pole plate; (3) packing the dried battery cell into a plastic shell, packaging, and detecting leakage, wherein the top end of the plastic shell is provided with a liquid injection hole which is provided with a safety valve; (4) carrying out vacuumizing liquid injecting on the packaged dried battery and standing; and (5) carrying out pre-charging, high temperature aging and forming on the battery to obtain a finished product battery. The method for preparing the high-capacity lithium iron phosphate lithium ion battery for the automobile provided by the invention is simple in process and low in cost, and the lithium ion battery obtained has the advantages of uniform temperature distribution, small internal resistance of the battery, no stress inside the battery, good rate discharge and good safety of the battery and the like so that the method for preparing the high-capacity lithium iron phosphate lithium ion battery for the automobile provided by the invention has a good application prospect.
Description
Technical field
The invention belongs to the preparation field of lithium ion battery, particularly a kind of large volume automobile is with the preparation method of ferric phosphate lithium ion battery.
Background technology
In petroleum resources day by day shortage, environmental pollution serious day by day today; The harmonious development of the energy, resource, environment and human society becomes the focus of social concerns day by day, seek to develop traditional fossil energy alternative energy source, realize harmless resource industries development, the harmony of seeking human and environment seems particularly urgent.Social in modern times, people are more and more strong to the demand of big capacity, high-power battery, particularly the requirement that is used for electric tool, electric bicycle, motorcycle, car power source and stand-by power supply battery improved constantly.The electrokinetic cell that uses at present is mainly lead-acid power accumulator, Ni-MH battery, nickel-cadmium cell.Lead in the lead-acid battery, the cadmium in the nickel-cadmium cell all can pollute environment from exploiting, smelt the blowdown of producing.Discard the back if deal with improperly at it in addition, will cause secondary pollution environment.So the lithium ion anode material electrokinetic cell of environmentally safe seems particularly important.
Lithium ion polymer battery in the market is main with the conventional type low capacity, and positive electrode mainly uses cobalt acid lithium material.But the high temperature safety and the overcharging resisting performance of cobalt acid lithium material are relatively poor, so can not be as the positive electrode of large-capacity high power polymer group ion electrokinetic cell.In addition, preparation large-capacity high-power power polymer lithium ion battery is if use conventional takeup type structure; Its battery pole piece is inevitable very long, bring very big difficulty to film-making, and pole piece is impaired easily; Not only can influence the battery capacity performance; And can cause the fail safe of battery to reduce, the internal resistance of cell is higher in addition, the high-rate battery discharge poor-performing.Therefore, up to the present, preparation large-capacity high power polymer lithium-ion-power cell is made slow progress.
LiFePO4 has the specific energy height, has extended cycle life, Stability Analysis of Structures, security performance are good, with low cost, do not have any poisonous and harmful substance, can not be to characteristics such as any pollutions of environment structure; It is the positive electrode that preparation large-capacity high-power electrokinetic cell has development potentiality most; But LiFePO4 processing difficulties; In preparation slurry process, absorb water easily, cause the coating difficulty.Along with the development and the progress of science and technology of society, lithium ion polymer battery is also constantly updating, and people urgently hope a kind of large-capacity high power polymer ferric lithium phosphate power cell.
Summary of the invention
Technical problem to be solved by this invention provides the preparation method of a kind of large volume automobile with ferric phosphate lithium ion battery; This method technology is simple; Cost is low, and the lithium ion battery that obtains is for baby battery composes in parallel high capacity cell, and the monomer macrocell has advantages such as the control point is few, system's manageability; Have uniformity of temperature profile, the internal resistance of cell is little, inside is unstressed, multiplying power discharging reaches advantages such as battery security is good well, have a good application prospect.
A kind of large volume automobile of the present invention comprises with the preparation method of ferric phosphate lithium ion battery:
(1) by weight percentage, the conductive agent of the LiFePO4 of 86%-92%, 2%-4%, 5% PVDF and the solvent of surplus are placed blender, vacuumize abundant stirring and process slurry, evenly be coated in slurry on the aluminium foil, obtain the anode pole piece;
(2) with above-mentioned anode pole piece through drying, roll-in, cut, process electric core behind cross cutting and the cathode pole piece lamination;
(3) with the plastic cement shell of packing into after the above-mentioned electric core drying, encapsulation, leak detection; Wherein, the top of plastic cement shell is provided with liquid injection hole, and safety valve is installed on the liquid injection hole;
(4) with the dry good battery vacuum-pumping fluid injection of above-mentioned encapsulation, shelve;
(5) with above-mentioned battery preliminary filling, wear out, change into, obtain the finished product battery.
Conductive agent in the said step (1) is electrically conductive graphite KS-6, electrically conductive graphite KS-15 or conductive carbon black SP.
Solvent in the said step (1) is n-formyl sarcolysine base pyrrolidones NMP.
The molecular weight of PVDF in the said step (1) is 1,000,000.The PVDF--Kynoar, the positive electrode binding agent.
Mixing speed in the said step (1) is 2400-2800rpm.
The thickness of the aluminium foil in the said step (1) is 15 ~ 25 μ m.
In the said step (2) during lamination anode pole piece be that 50-80 opens, cathode pole piece is that 51-81 opens.
Safety valve in the said step (3) is the spring Low lift safety valve.
Aging temperature in the said step (5) is 45 ℃, and ageing time is 48-72 hour.
Beneficial effect
(1) technology of the present invention is simple, and cost is low, and the lithium ion battery that obtains is for baby battery composes in parallel high capacity cell, and the monomer macrocell has advantages such as the control point is few, system's manageability;
(2) battery produced of the stacked manufacture method of the present invention has uniformity of temperature profile, the internal resistance of cell is little, inside is unstressed, multiplying power discharging reaches advantages such as battery security is good well;
(3) the present invention is with respect to the box hat battery, and the fail safe of plastic cement housing battery is good;
(4) safety valve of the present invention connects the fluid injection inlet, has preliminary filling, changes into the venting effect; When air pressure is big, have the pressure release effect, guarantee the safety of battery.
Description of drawings
The front view of the ferric phosphate lithium ion battery that Fig. 1 prepares for the present invention; Wherein, 1 is plastic housing, and 3 is safety valve;
Fig. 2 is the vertical view of Fig. 1; Wherein, 1 is plastic housing, and 2 is liquid injection hole, and 3 is safety valve, and 4 is anodal, and 5 is negative pole.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
(1) by weight percentage; LiFePO4 with 86%, 2% electrically conductive graphite KS-6,5% PVDF and the n-formyl sarcolysine base pyrrolidones of surplus place blender; Vacuumize 2400rpm and fully stir and process slurry, evenly be coated in slurry on the 15 μ m aluminium foils, obtain the anode pole piece;
(2) with above-mentioned anode pole piece through drying, roll-in, cut, process electric core behind cross cutting and the cathode pole piece lamination (anode pole piece is 50, and cathode pole piece is 51);
(3) with the plastic cement shell of packing into after the above-mentioned electric core drying, encapsulation, leak detection; Wherein, the top of plastic cement shell is provided with liquid injection hole, and the spring Low lift safety valve is installed on the liquid injection hole;
(4) with the dry good battery vacuum-pumping fluid injection of above-mentioned encapsulation, shelve;
(5) with aging 48 hours of above-mentioned battery preliminary filling, 45 ℃, change into, obtain the finished product battery.
Embodiment 2
(1) by weight percentage; LiFePO4 with 92%, 4% conductive carbon black SP, 5% PVDF and the n-formyl sarcolysine base pyrrolidones of surplus place blender; Vacuumize 2800rpm and fully stir and process slurry, evenly be coated in slurry on the 25 μ m aluminium foils, obtain the anode pole piece;
(2) with above-mentioned anode pole piece through drying, roll-in, cut, process electric core behind cross cutting and the cathode pole piece lamination (anode pole piece is 80, and cathode pole piece is 81);
(3) with the plastic cement shell of packing into after the above-mentioned electric core drying, encapsulation, leak detection; Wherein, the top of plastic cement shell is provided with liquid injection hole, and the spring Low lift safety valve is installed on the liquid injection hole;
(4) with the dry good battery vacuum-pumping fluid injection of above-mentioned encapsulation, shelve;
(5) with aging 72 hours of above-mentioned battery preliminary filling, 45 ℃, change into, obtain the finished product battery.
Claims (9)
1. a large volume automobile comprises with the preparation method of ferric phosphate lithium ion battery:
(1) by weight percentage, the conductive agent of the LiFePO4 of 86%-92%, 2%-4%, 5% PVDF and the solvent of surplus are placed blender, vacuumize abundant stirring and process slurry, evenly be coated in slurry on the aluminium foil, obtain the anode pole piece;
(2) with above-mentioned anode pole piece through drying, roll-in, cut, process electric core behind cross cutting and the cathode pole piece lamination;
(3) with the plastic cement shell of packing into after the above-mentioned electric core drying, encapsulation, leak detection; Wherein, the top of plastic cement shell is provided with liquid injection hole, and safety valve is installed on the liquid injection hole;
(4) with the dry good battery vacuum-pumping fluid injection of above-mentioned encapsulation, shelve;
(5) with above-mentioned battery preliminary filling, wear out, change into, obtain the finished product battery.
2. a kind of large volume automobile according to claim 1 is characterized in that with the preparation method of ferric phosphate lithium ion battery: the conductive agent in the said step (1) is electrically conductive graphite KS-6, electrically conductive graphite KS-15 or conductive carbon black SP.
3. a kind of large volume automobile according to claim 1 is characterized in that with the preparation method of ferric phosphate lithium ion battery: the solvent in the said step (1) is a n-formyl sarcolysine base pyrrolidones.
4. a kind of large volume automobile according to claim 1 is characterized in that with the preparation method of ferric phosphate lithium ion battery: the molecular weight of the PVDF in the said step (1) is 1,000,000.
5. a kind of large volume automobile according to claim 1 is characterized in that with the preparation method of ferric phosphate lithium ion battery: the mixing speed in the said step (1) is 2400-2800rpm.
6. a kind of large volume automobile according to claim 1 is characterized in that with the preparation method of ferric phosphate lithium ion battery: the thickness of the aluminium foil in the said step (1) is 15 ~ 25 μ m.
7. a kind of large volume automobile according to claim 1 is characterized in that with the preparation method of ferric phosphate lithium ion battery: in the said step (2) during lamination anode pole piece be that 50-80 opens, cathode pole piece is that 51-81 opens.
8. a kind of large volume automobile according to claim 1 is characterized in that with the preparation method of ferric phosphate lithium ion battery: the safety valve in the said step (3) is the spring Low lift safety valve.
9. a kind of large volume automobile according to claim 1 is characterized in that with the preparation method of ferric phosphate lithium ion battery: the aging temperature in the said step (5) is 45 ℃, and ageing time is 48-72 hour.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102371064A CN102751535A (en) | 2012-07-10 | 2012-07-10 | Method for preparing high-capacity lithium iron phosphate lithium ion battery for automobile |
| CN201210568730.2A CN103022564B (en) | 2012-07-10 | 2012-12-25 | Fabrication method of high-capacity lithium iron phosphate battery for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102371064A CN102751535A (en) | 2012-07-10 | 2012-07-10 | Method for preparing high-capacity lithium iron phosphate lithium ion battery for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102751535A true CN102751535A (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102371064A Pending CN102751535A (en) | 2012-07-10 | 2012-07-10 | Method for preparing high-capacity lithium iron phosphate lithium ion battery for automobile |
| CN201210568730.2A Expired - Fee Related CN103022564B (en) | 2012-07-10 | 2012-12-25 | Fabrication method of high-capacity lithium iron phosphate battery for automobile |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210568730.2A Expired - Fee Related CN103022564B (en) | 2012-07-10 | 2012-12-25 | Fabrication method of high-capacity lithium iron phosphate battery for automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113488699A (en) * | 2021-05-08 | 2021-10-08 | 上海兰钧新能源科技有限公司 | Packaging method of soft package lithium battery |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332591B (en) * | 2014-09-05 | 2016-08-24 | 济宁市无界科技有限公司 | A kind of lithium ion battery anode glue size and preparation technology thereof |
| CN105552368A (en) * | 2015-12-23 | 2016-05-04 | 山东精工电子科技有限公司 | Positive electrode paste of polymer lithium-ion battery, preparation method of positive electrode paste and negative electrode pole plate and polymer lithium-ion battery prepared from positive electrode paste |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101262077A (en) * | 2008-04-29 | 2008-09-10 | 上海德朗能电池有限公司 | A high-capacity secure 26650 lithium ion battery and its making method |
| CN102048369A (en) * | 2009-11-10 | 2011-05-11 | 林强 | Notebook computer stand |
| CN102185129B (en) * | 2011-01-28 | 2013-12-11 | 厦门钨业股份有限公司 | Lithium iron phosphate lithium ion battery and machining method thereof |
-
2012
- 2012-07-10 CN CN2012102371064A patent/CN102751535A/en active Pending
- 2012-12-25 CN CN201210568730.2A patent/CN103022564B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113488699A (en) * | 2021-05-08 | 2021-10-08 | 上海兰钧新能源科技有限公司 | Packaging method of soft package lithium battery |
| CN113488699B (en) * | 2021-05-08 | 2022-08-23 | 上海兰钧新能源科技有限公司 | Packaging method of soft package lithium battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103022564B (en) | 2015-02-25 |
| CN103022564A (en) | 2013-04-03 |
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Application publication date: 20121024 |