CN102136605B - Lithium iron phosphate battery manufacturing method - Google Patents
Lithium iron phosphate battery manufacturing method Download PDFInfo
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- CN102136605B CN102136605B CN2011100321901A CN201110032190A CN102136605B CN 102136605 B CN102136605 B CN 102136605B CN 2011100321901 A CN2011100321901 A CN 2011100321901A CN 201110032190 A CN201110032190 A CN 201110032190A CN 102136605 B CN102136605 B CN 102136605B
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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
Abstract
The invention discloses a lithium iron phosphate battery manufacturing method. The method comprises the following steps of: dosing and coating a lithium iron phosphate material according to a conventional process and manufacturing the lithium iron phosphate material into a pole piece; assembling the pole piece with the pole piece made of graphite together; and injecting liquid for sealing. The method is characterized in that: laying processes after injecting the liquid, forming and grading capacity adopt high-temperature activation processes respectively or at the same time, wherein the temperature is between 50 and 85 DEG C and the laying time is 4 to 144 hours. A lithium iron phosphate battery has high electrical conductivity, high ion diffusion capacity, high low-temperature discharge performance, and a good popularization value.
Description
Technical field
The present invention relates to the lithium-ion-power cell technical field, relate to more specifically a kind of manufacture method that improves low temperature performance of lithium iron phosphate batteries.
Background technology
Electric automobile and new-energy automobile are 21 century automobile industry development new milestones, and to alleviating global energy crisis, the protection of optimizing the environment, realization sustainable development have special and far reaching significance.In recent years, a kind of Olivine-type Cathode Material in Li-ion Batteries-LiFePO 4, because with low cost good with security performance, and be widely used in lithium ion power battery used for electromobile, but the weak point of ferric phosphate lithium cell maximum is: cryogenic property is bad, and in subzero, discharge capacity sharply descends, discharge under the environment at subzero 20 degree, often discharge capacity can only reach 70% even also do not reach.
Summary of the invention
Purpose of the present invention is exactly the ferric phosphate lithium cell manufacture method that a kind of electrical conductance is good and the Ionic diffusion energy is good, low temperature performance is good that provides for the deficiency that solves prior art.
The present invention adopts following technical solution to realize above-mentioned purpose: a kind of ferric phosphate lithium cell manufacture method, it is that pole piece is prepared burden, is coated with and makes to ferrousphosphate lithium material according to common process, assemble with the pole piece made from graphite, the fluid injection sealing, it is characterized in that, after the fluid injection, change into partial volume after shelve operation respectively or adopt simultaneously high-temperature activation technique, temperature 50-85 degree was shelved time 4-144 hour.
As further specifying of such scheme, its preparation process of described ferric phosphate lithium cell is that the adhesive with polyvinylidene fluoride mixes with N-methyl-2-arsenic pyrrolidone, stirs to add conductive carbon black after 3-4 hour, high-speed stirred 3-4 hour, add LiFePO 4, high-speed stirred 2-5 hour, filter coating, and make pole piece, assemble fluid injection with the pole piece made from graphite, sealing, adopt high-temperature activation technique, temperature 50-85 degree was shelved time 4-144 hour; Shelve operation after changing into, adopt high-temperature activation technique, temperature 50-85 degree was shelved partial volume time 4-144 hour.
Its preparation process of described ferric phosphate lithium cell is that the adhesive with polyvinylidene fluoride mixes with N-methyl-2-arsenic pyrrolidone, stirs to add conductive carbon black after 3-4 hour, high-speed stirred 3-4 hour, add LiFePO 4, high-speed stirred 2-5 hour, filter coating, and make pole piece, assemble with the pole piece made from graphite, fluid injection, high-temperature activation technique is adopted in sealing, temperature 50-85 degree was shelved time 4-144 hour; Change into, high-temperature activation technique is adopted in normal temperature 20-25 degree activation 4-144 hour behind the partial volume, and temperature 50-85 degree was shelved time 4-144 hour.
The beneficial effect that the present invention adopts above-mentioned technical solution to reach is:
The present invention prepares burden ferrousphosphate lithium material according to common process, coating, and make pole piece, assemble the fluid injection sealing with the pole piece made from graphite, after the fluid injection, change into partial volume after the operation of shelving adopt high-temperature activation technique, temperature 50-85 degree was shelved time 4-144 hour, made in accordance with the present invention ferric phosphate lithium cell, discharge with 0.33C under subzero 20 degree conditions, discharge capacity can reach more than 80%.
Description of drawings
Fig. 1 is the discharge capacity figure of ferric phosphate lithium cell of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing 1 and specific embodiment:
Embodiment 1
Take the electrokinetic cell of column type IFR26650 as example, adhesive and the N-methyl of polyvinylidene fluoride-2-arsenic pyrrolidone is mixed, stir and add conductive carbon black after 3-4 hour, high-speed stirred 3-4 hour, add LiFePO 4, high-speed stirred 2-5 hour, filter coating, and make pole piece, assemble fluid injection with the pole piece made from graphite, sealing, adopt high-temperature activation technique, temperature 50-85 degree was shelved time 4-144 hour.Shelve operation after changing into, adopt high-temperature activation technique, temperature 50-85 degree was shelved time 4-144 hour, partial volume, and ferric phosphate lithium cell discharges with 0.33C under subzero 20 degree conditions made in accordance with the present invention, and discharge capacity can reach more than 80%.
Embodiment 2
Take the electrokinetic cell of column type IFR32650 as example, adhesive and the N-methyl of polyvinylidene fluoride-2-arsenic pyrrolidone is mixed, stir and add conductive carbon black after 3-4 hour, high-speed stirred 3-4 hour, add LiFePO 4, high-speed stirred 2-5 hour, filter coating, and make pole piece, assemble fluid injection with the pole piece made from graphite, sealing, adopt high-temperature activation technique, temperature 50-85 degree was shelved time 4-144 hour.Change into, high-temperature activation technique is adopted in normal temperature 20-25 degree activation 4-144 hour behind the partial volume, and temperature 50-85 degree was shelved time 4-144 hour., ferric phosphate lithium cell discharges with 0.33C under subzero 20 degree conditions made in accordance with the present invention, and discharge capacity can reach more than 80%.
Comparative Examples 1
Take the electrokinetic cell of column type IFR26650 as example, the adhesive of polyvinylidene fluoride is mixed with N-methyl-2-arsenic pyrrolidone, add conductive carbon black after stirring after 3-4 hour, high-speed stirred 3-4 hour, add LiFePO 4, high-speed stirred 2-5 hour, filter coating, and make pole piece, assemble sealing with the pole piece made from graphite.In the fluid injection operation, adopt conventional activating process, temperature 40-45 degree was shelved time 4-72 hour.Change into, adopt conventional activating process, temperature 40-45 degree was shelved time 4-72 hour, partial volume, and the ferric phosphate lithium cell according to this technology is made discharges with 0.33C under subzero 20 degree conditions, and discharge capacity can only reach about 70%.
In conjunction with Fig. 1, embodiment 1 and the result of Comparative Examples 1 are compared, ferric phosphate lithium cell discharges embodiment 1(a line with 0.33C under subzero 20 degree conditions made in accordance with the present invention) discharge capacity is apparently higher than Comparative Examples 1(b line).
Above-described only is preferred implementation of the present invention, should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, and these all belong to protection scope of the present invention.
Claims (1)
1. ferric phosphate lithium cell manufacture method, it is that adhesive with polyvinylidene fluoride mixes with METHYLPYRROLIDONE, stirs to add conductive carbon black after 3-4 hour, high-speed stirred 3-4 hour, add LiFePO 4, high-speed stirred 2-5 hour, filter coating, and make pole piece, assemble with the pole piece made from graphite, fluid injection, sealing is characterized in that, adopts high-temperature activation technique, temperature 50-85 degree was shelved time 4-144 hour; Change into, high-temperature activation technique is adopted in normal temperature 20-25 degree activation 4-144 hour behind the partial volume, and temperature 50-85 degree was shelved time 4-144 hour.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100321901A CN102136605B (en) | 2011-01-30 | 2011-01-30 | Lithium iron phosphate battery manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100321901A CN102136605B (en) | 2011-01-30 | 2011-01-30 | Lithium iron phosphate battery manufacturing method |
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| CN102136605A CN102136605A (en) | 2011-07-27 |
| CN102136605B true CN102136605B (en) | 2013-09-18 |
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| CN2011100321901A Expired - Fee Related CN102136605B (en) | 2011-01-30 | 2011-01-30 | Lithium iron phosphate battery manufacturing method |
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| CN106898834B (en) * | 2017-04-20 | 2020-06-16 | 北京工业大学 | Method for improving cycling stability of lithium-rich manganese-based layered oxide |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212067A (en) * | 2006-12-29 | 2008-07-02 | 上海比亚迪有限公司 | Li-ion secondary battery formation method |
| CN101335364A (en) * | 2007-06-28 | 2008-12-31 | 比亚迪股份有限公司 | Li-ion secondary battery formation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010287512A (en) * | 2009-06-12 | 2010-12-24 | Toyota Motor Corp | Method of manufacturing lithium ion secondary battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212067A (en) * | 2006-12-29 | 2008-07-02 | 上海比亚迪有限公司 | Li-ion secondary battery formation method |
| CN101335364A (en) * | 2007-06-28 | 2008-12-31 | 比亚迪股份有限公司 | Li-ion secondary battery formation method |
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| JP特开2010-287512A 2010.12.24 |
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