CN102403537A - Method for manufacturing lithium iron phosphate battery - Google Patents
Method for manufacturing lithium iron phosphate battery Download PDFInfo
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- CN102403537A CN102403537A CN2011103889682A CN201110388968A CN102403537A CN 102403537 A CN102403537 A CN 102403537A CN 2011103889682 A CN2011103889682 A CN 2011103889682A CN 201110388968 A CN201110388968 A CN 201110388968A CN 102403537 A CN102403537 A CN 102403537A
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- phosphate battery
- lithium iron
- iron phosphate
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- battery
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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 method provides a method for manufacturing a lithium iron phosphate battery. The method comprises the following steps of: adding carbon substances with high specific surface areas when a positive electrode material and a negative electrode material are mixed, wherein the carbon substances is 1 to 15 percent based on the weight of the total electrode powder; stirring and mixing to obtain slurry; coating slurry on an aluminum foil and a copper foil; tabletting; assembling; injecting liquid; forming; and sealing to manufacture the lithium iron phosphate battery. The lithium iron phosphate battery has good charge-discharge performance, can be charged and discharged quickly, is long in cycle life and can meet using requirements of electrombiles and power for grid peak and valley adjustment.
Description
Technical field
The present invention relates to the lithium ion battery production method, particularly a kind of manufacture method of ion-lithium phosphate battery with excellent fast charging and discharging performance, long circulation life.
Background technology
Environmental pollution, shortage of resources, oil crisis etc. force human cleaning, the regenerative resource used.Replace oil with electricity on the one hand, reduce municipal pollution, the development electric motor car is the task of top priority; The development and utilization new forms of energy are regulated the electrical network electricity using at the peak time on the other hand, effectively store and utilize the low ebb electric weight, and secondary cell especially large capacity version secondary cell then becomes electric motor car and the key that stores the valley electricity technology.
Lithium ion battery with monomer whose operating voltage height, high-energy-density density, have extended cycle life, advantages such as self-discharge rate is little, memory-less effect, environmental protection.Especially positive electrode uses the lithium ion battery of LiFePO4 (LiFePO4) made; Advantage such as good with its stability of material, that security performance is good, cost is low, have extended cycle life; Be more suitable for being made into great-capacity power battery, to be used in electric motor car and to store the valley electricity aspect.
Because the shortcoming of LiFePO4 (LiFePO4) material self, lithium ion is lower in LiFePO4 (LiFePO4) material granule diffusion inside speed, and the electron conduction of material is also relatively poor.Though now people adopt to the shortcoming of LiFePO 4 material mix, the surface coats, reduce method such as material particle size handles; But in the present ferric phosphate lithium cell manufacturing process; The most specific area of carbon substance conductance agent that is added during the both positive and negative polarity batch mixing is lower; Therefore, present ferric phosphate lithium cell is when the electrokinetic cell, and the performances such as cycle life when its cryogenic property, fast charging and discharging performance, fast charging and discharging still are difficult to the level that reaches higher.
Summary of the invention
The object of the present invention is to provide a kind of manufacture method of ferric phosphate lithium cell of the long circulation life with excellent fast charging and discharging performance.
Technical scheme of the present invention relates to the mixing of materials when anode and cathode slurry prepares in the ferric phosphate lithium cell making; By existing technological preparation both positive and negative polarity material, its improvements add total powder weight 1.0%～15% when being the both positive and negative polarity mixing of materials specific area is the carbon material of 80～5000 ㎡/g.
The above-mentioned high specific area carbon elemental substance that adds is the mixture of a kind of or several kinds of arbitrary proportions in active carbon, CNT, carbon fiber, Graphene, the conductive carbon black.
The present invention is when the both positive and negative polarity batch mixing; The carbon material that all adds high-specific surface area; Process slurry through mixing; Slurry is coated in respectively on aluminium foil and the Copper Foil, passes through compressing tablet, film-making, assembling, fluid injection then, change into, seal, promptly process the ferric phosphate lithium cell of long circulation life with excellent fast charging and discharging performance.Compressing tablet, film-making, assembling, fluid injection, the normal ferric phosphate lithium cell manufacture craft of process using such as change into, seal.
The present invention adds the latter made ferric phosphate lithium cell of high specific area carbon material and compares with common ferric phosphate lithium cell and have following two advantages in the both positive and negative polarity material:
(1) has excellent fast charging and discharging performance;
The carbon element material that adds high-specific surface area; To increase LiFePO4 (LiFePO4) positive electrode and the particle of negative material and the contact area of high surface area carbon elemental substance; Thereby strengthen the conductivity that is made into pole piece, make ferric phosphate lithium cell can realize the fast charging and discharging performance of 3C～20C.
(2) cycle life of ferric phosphate lithium cell in the time of can significantly improving fast charging and discharging.
The carbon element material that adds high-specific surface area; Strengthened the conductivity that is made into pole piece; Lithium ion reduces the possibility that Li dendrite forms in the pole piece surface time of staying when shortening fast charging and discharging, thereby improves the cycle life of ferric phosphate lithium cell when fast charging and discharging.
Embodiment
Instance 1: making can be carried out the long-life ferric phosphate lithium cell of 3～5 rate charge-discharges circulation.
When anodal batch mixing, add total powder (press common process and prepare, down together), 1% specific area of weight is 250m
2The CNT of/g and 2% specific area are 360m
2The mixture of/g Graphene; 1% specific area that when the negative pole batch mixing, adds total powder weight is 250m
2/ g CNT and 1.5% specific area are 100m
2The mixture of/g conductive carbon black; Process slurry through mixing, slurry is coated in respectively on aluminium foil and the Copper Foil, pass through conventional compressing tablet, film-making, assembling, fluid injection then, change into, seal promptly to process and to carry out 3～5 rate charge-discharge recycled phosphoric acid lithium iron batteries.Battery circulates after 2000 times when carrying out 3 rate charge-discharge loop tests, and the discharge capacity of battery still remains on more than 90% of initial capacity.
Instance 2: making can be carried out the long-life ferric phosphate lithium cell of 7～10 rate charge-discharges circulation.
3% specific area that when anodal batch mixing, adds total powder weight is 4000m
2The active carbon of/g and 2% specific area are 360m
2The mixture of/g Graphene; 1.5% specific area that when the negative pole batch mixing, adds total powder weight is 360m
2/ g Graphene and 2% specific area are 100m
2The mixture of/g conductive carbon black; Process slurry through mixing, slurry is coated in respectively on aluminium foil and the Copper Foil, pass through conventional compressing tablet, film-making, assembling, fluid injection then, change into, seal promptly to process and to carry out 7～10 rate charge-discharge recycled phosphoric acid lithium iron batteries.Battery circulates after 3000 times when carrying out 8 rate charge-discharge loop tests, and the discharge capacity of battery still remains on more than 88% of initial capacity.
Instance 3: making can be carried out the long-life ferric phosphate lithium cell of 13～15 rate charge-discharges circulation.
6% specific area that when anodal batch mixing, adds total powder weight is 4000m
2The active carbon of/g and 3% specific area are 360m
2The mixture of/g Graphene; 2.5% specific area that when the negative pole batch mixing, adds total powder weight is 360m
2/ g Graphene and 4% specific area are 250m
2The mixture of the CNT of/g; Process slurry through mixing, slurry is coated in respectively on aluminium foil and the Copper Foil, pass through conventional compressing tablet, film-making, assembling, fluid injection then, change into, seal promptly to process and to carry out 13～15 rate charge-discharge recycled phosphoric acid lithium iron batteries.Battery circulates after 3500 times when carrying out 13 rate charge-discharge loop tests, and the discharge capacity of battery still remains on more than 88% of initial capacity.
Instance 4: making can be carried out the long-life ferric phosphate lithium cell of 20～25 rate charge-discharges circulation.
10% specific area that when anodal batch mixing, adds total powder weight is 4000m
2The active carbon of/g and 5% specific area are 360m
2The mixture of/g Graphene; 3.5% specific area that when the negative pole batch mixing, adds total powder weight is 360m
2/ g Graphene and 6% specific area are 250m
2The mixture of the CNT of/g; Process slurry through mixing, slurry is coated in respectively on aluminium foil and the Copper Foil, pass through conventional compressing tablet, film-making, assembling, fluid injection then, change into, seal promptly to process and to carry out 13～15 rate charge-discharge recycled phosphoric acid lithium iron batteries.Battery circulates after 5000 times when carrying out 25 rate charge-discharge loop tests, and the discharge capacity of battery still remains on more than 91% of initial capacity.
Instance 5: making can be carried out the long-life ferric phosphate lithium cell of 15～25 rate charge-discharges circulation.
15% specific area that when anodal batch mixing, adds total powder weight is 360m
2/ g Graphene; 8% specific area that when the negative pole batch mixing, adds total powder weight is 3500m
2The active carbon of/g; Process slurry through mixing, slurry is coated in respectively on aluminium foil and the Copper Foil, pass through conventional compressing tablet, film-making, assembling, fluid injection then, change into, seal promptly to process and to carry out 15～25 rate charge-discharge recycled phosphoric acid lithium iron batteries.Battery circulates after 5000 times when carrying out 20 rate charge-discharge loop tests, and the discharge capacity of battery still remains on more than 90% of initial capacity.
The ferric phosphate lithium cell that a large amount of experiment proofs adopts the inventive method to process has excellent fast charging and discharging performance, and the cycle life of battery is also well a lot of than the ferric phosphate lithium cell cycle life that conventional method is made during fast charging and discharging.
Claims (2)
1. a manufacture method of ion-lithium phosphate battery comprises the both positive and negative polarity mixing of materials, and the specific area that adds total powder weight 1.0%～15% when it is characterized in that the both positive and negative polarity mixing of materials is the carbon material of 80～5000 ㎡/g.
2. by the described manufacture method of ion-lithium phosphate battery of claim 1, it is characterized in that said carbon material is the mixture of one or more arbitrary proportions in active carbon, CNT, carbon fiber, Graphene, the conductive carbon black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103889682A CN102403537A (en) | 2011-11-30 | 2011-11-30 | Method for manufacturing lithium iron phosphate battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103889682A CN102403537A (en) | 2011-11-30 | 2011-11-30 | Method for manufacturing lithium iron phosphate battery |
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| CN102403537A true CN102403537A (en) | 2012-04-04 |
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| CN2011103889682A Pending CN102403537A (en) | 2011-11-30 | 2011-11-30 | Method for manufacturing lithium iron phosphate battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050292A (en) * | 2012-12-20 | 2013-04-17 | 上海奥威科技开发有限公司 | High-power double-electric layer capacitor |
| CN106058252A (en) * | 2016-08-17 | 2016-10-26 | 江苏金坛绿能新能源科技有限公司 | Lithium ion battery cathode slurry and preparation method thereof |
| CN107256966A (en) * | 2017-05-17 | 2017-10-17 | 常州第六元素材料科技股份有限公司 | A kind of anode slice of lithium ion battery and preparation method thereof, lithium ion battery anode glue size and its method |
| RU2674167C2 (en) * | 2014-12-23 | 2018-12-05 | Нр Электрик Ко., Лтд. | Method of switching passive section to connection to power system |
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| US20060166093A1 (en) * | 2002-11-13 | 2006-07-27 | Hydro-Quebec | Electrode coated with a film obtained from an aqueous solution comprising a water-soluble binder, production method thereof and uses of same |
| CN101207204A (en) * | 2006-12-22 | 2008-06-25 | 比亚迪股份有限公司 | Lithium ion battery anode material and lithium ion battery and anode containing the material |
| CN101510625A (en) * | 2009-03-26 | 2009-08-19 | 西安瑟福能源科技有限公司 | Ultra-high magnification lithium ion battery |
| JP2009295465A (en) * | 2008-06-06 | 2009-12-17 | Iwate Univ | Positive electrode active material for lithium secondary battery and manufacturing method |
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2011
- 2011-11-30 CN CN2011103889682A patent/CN102403537A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060166093A1 (en) * | 2002-11-13 | 2006-07-27 | Hydro-Quebec | Electrode coated with a film obtained from an aqueous solution comprising a water-soluble binder, production method thereof and uses of same |
| CN101207204A (en) * | 2006-12-22 | 2008-06-25 | 比亚迪股份有限公司 | Lithium ion battery anode material and lithium ion battery and anode containing the material |
| JP2009295465A (en) * | 2008-06-06 | 2009-12-17 | Iwate Univ | Positive electrode active material for lithium secondary battery and manufacturing method |
| CN101510625A (en) * | 2009-03-26 | 2009-08-19 | 西安瑟福能源科技有限公司 | Ultra-high magnification lithium ion battery |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050292A (en) * | 2012-12-20 | 2013-04-17 | 上海奥威科技开发有限公司 | High-power double-electric layer capacitor |
| RU2674167C2 (en) * | 2014-12-23 | 2018-12-05 | Нр Электрик Ко., Лтд. | Method of switching passive section to connection to power system |
| CN106058252A (en) * | 2016-08-17 | 2016-10-26 | 江苏金坛绿能新能源科技有限公司 | Lithium ion battery cathode slurry and preparation method thereof |
| CN107256966A (en) * | 2017-05-17 | 2017-10-17 | 常州第六元素材料科技股份有限公司 | A kind of anode slice of lithium ion battery and preparation method thereof, lithium ion battery anode glue size and its method |
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Application publication date: 20120404 |