CN102142580A - 300Ah high and low temperature lithium iron phosphate battery - Google Patents
300Ah high and low temperature lithium iron phosphate battery Download PDFInfo
- Publication number
- CN102142580A CN102142580A CN2011100401624A CN201110040162A CN102142580A CN 102142580 A CN102142580 A CN 102142580A CN 2011100401624 A CN2011100401624 A CN 2011100401624A CN 201110040162 A CN201110040162 A CN 201110040162A CN 102142580 A CN102142580 A CN 102142580A
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- low temperature
- electrolyte
- battery
- iron phosphate
- lithium iron
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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
Abstract
The invention relates to a 300Ah high and low temperature lithium iron phosphate battery. The 300Ah high and low temperature lithium iron phosphate battery comprises electrolyte in which vinyl acetate resin serving as a film forming additive and ethylene sulfide are added; and the vinyl acetate resin and the ethylene sulfide account for 0.1 to 0.5 percent of the total mass of the electrolyte respectively. In the 300Ah high and low temperature lithium iron phosphate battery, the conductivity of the electrolyte is improved theoretically by adding different additives in the electrolyte, so the low temperature performance of the battery is improved; and a detection result shows that the discharging capacity of the battery in a low temperature environment of -20 DEG C is 95 percent of the initial capacity.
Description
Technical field
The present invention relates to a kind of ferric phosphate lithium cell, particularly relate to a kind of high low temperature that improves electrolyte property and take into account the type ferric phosphate lithium cell.
Background technology
What be applied to the base station at present mainly contains lead-acid battery and ferric phosphate lithium cell, lead-acid battery exists the life-span short, maintenance workload is big, current margin is little, sensitivity to temperature, unfavorable factors such as over-charging difference, especially influenced by variation of temperature bigger for the voltage of lead-acid battery and capacity parameter, 10 degrees centigrade of the every risings of data displays temperature are arranged, the life-span of storage battery will shorten 50%, ferric phosphate lithium cell has the operating voltage height, the specific energy height, it is long to discharge and recharge the life-span, advantages such as the low and memory-less effect of self-discharge rate, at electrokinetic cell market dominate, range of application more and more widely.To battery electrical property, reliability, the higher occasion of security requirement, such as Aeronautics and Astronautics and military field, ferric phosphate lithium cell also will become a star gradually at those.But the cryogenic property of present ferric phosphate lithium cell, particularly the service behaviour in low temperature environment below-20 ℃ is relatively poor, has suppressed its application at special dimension.And attempt with conventional at present ferric phosphate lithium cell as base station power, because of the stability of structure of LiFePO 4 material own, solved under the condition of high temperature influence to battery performance, but low temperature has problems equally, data show that conventional ferric phosphate lithium cell discharge capacity in-20 ℃ of low temperature environments has only 40%～50% of initial capacity.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of ferric phosphate lithium cell that can take into account the performance under low temperature, the condition of high temperature is provided.
Technical scheme of the present invention is: the high low temperature of a kind of 300Ah is taken into account the type ferric phosphate lithium cell, comprises electrolyte, has added film for additive vinyl acetate, cured ethylene in the described electrolyte, and the addition of the two is respectively electrolyte quality 0.1～0.5%.
Preferably: described electrolyte is with propene carbonate: the dimethyl carbonic ether: the dicyandiamide solution of ethyl-methyl carbonic ether=1: 3: 8 mass ratio, and with LiPF
6The 1.0mol/L LiPF that is made into for electrolytic salt
6Solution.
Beneficial effect of the present invention is: the present invention is by adding different additives has improved electrolyte from principle conductivity in electrolyte, improved the cryogenic property of battery, testing result shows that I take charge of battery discharge capacity in-20 ℃ of low temperature environments and reach 95% of initial capacity.{ method of testing: under-20 ℃ ± 2 ℃ conditions, store 16h.Then under same temperature, with the 1C constant-current discharge to final voltage (2.0V).Calculate discharge capacity (in Ah).}。
Embodiment
The following describes the specific embodiment of the present invention:
The high low temperature of a kind of 300Ah is taken into account the type ferric phosphate lithium cell, comprises electrolyte, has added film for additive vinyl acetate, cured ethylene in the described electrolyte, and the addition of the two is respectively electrolyte quality 0.1～0.5%.Described electrolyte is with propene carbonate: the dimethyl carbonic ether: the dicyandiamide solution of ethyl-methyl carbonic ether=1: 3: 8 mass ratio, and with LiPF
6The 1.0mol/L LiPF that is made into for electrolytic salt
6Solution.
300AH ferric phosphate lithium ion battery of the present invention can be used as the substitute products of lead acid accumulator and common ferric phosphate lithium cell fully, the present invention adopts high low temperature to take into account type electrolyte, electrolyte is the important component part of lithium-ions battery, undertake the effect of transmitting ion asking of inside battery positive and negative electrode, electrolyte is mainly reflected in its influence to conductivity and solid electrolyte boundary SEI film character to the influence of cryogenic property.The character of SEI film as hole jail, electronics and ionic conductivity, all has material impact to irreversible capacity, cryogenic property, cycle performance and the security performance of battery.It is insoluble that good SEI film should have organic solvent, allow more freely to pass in and out electrode and solvent molecule can't pass through, thereby stoping solvent molecule to be inserted altogether destroys electrode, improves electrode cycle life.The present invention is by after adding film for additive VA (vinyl acetate), ES (cured ethylene) respectively in electrolyte, inserting altogether of PC (propene carbonate) molecule is inhibited, the cycle performance of MCMB (carbonaceous mesophase spherules) electrode improves, studies show that, VA, ES have participated in the formation of SEI film in the cyclic process of battery, and lead the RCO of lithium poor-performing in the SEI membrane component
3Li (lithium carbonate) and ROLi (carbonyl lithium) content reduces, and has reduced the interface impedance of SEI film.Therefore, in lithium-ions battery electrolyte, add an amount of film for additive, reduce the SEI film resistance, can improve the cryogenic property of battery.
Claims (2)
1. the high low temperature of 300Ah is taken into account the type ferric phosphate lithium cell, comprises electrolyte, it is characterized in that; Added film for additive vinyl acetate, cured ethylene in the described electrolyte, the addition of the two is respectively electrolyte quality 0.1～0.5%.
2. the high low temperature of 300Ah as claimed in claim 1 is taken into account the type ferric phosphate lithium cell, it is characterized in that: described electrolyte is with propene carbonate: the dimethyl carbonic ether: the dicyandiamide solution of ethyl-methyl carbonic ether=1: 3: 8 mass ratio, and with LiPF
6For electrolytic salt be made into 1,0mol/L LiPF
6Solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100401624A CN102142580A (en) | 2011-02-18 | 2011-02-18 | 300Ah high and low temperature lithium iron phosphate battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100401624A CN102142580A (en) | 2011-02-18 | 2011-02-18 | 300Ah high and low temperature lithium iron phosphate battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102142580A true CN102142580A (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100401624A Pending CN102142580A (en) | 2011-02-18 | 2011-02-18 | 300Ah high and low temperature lithium iron phosphate battery |
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| CN (1) | CN102142580A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780037A (en) * | 2012-07-19 | 2012-11-14 | 宁德新能源科技有限公司 | Nonaqueous electrolyte and lithium ion battery containing same |
| CN104380517B (en) * | 2012-06-13 | 2018-01-02 | 中央硝子株式会社 | Battery with nonaqueous electrolyte electrolyte and use its battery with nonaqueous electrolyte |
Citations (3)
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| CN1599120A (en) * | 2004-07-30 | 2005-03-23 | 北京科技大学 | Preparation of electrolytic additivef for increasing circuilation service life of lithium ion cell and using method |
| US20100047695A1 (en) * | 2008-08-19 | 2010-02-25 | California Institute Of Technology | Lithium-Ion Electrolytes Containing Flame Retardant Additives for Increased Safety Characteristics |
| CN101916878A (en) * | 2010-08-27 | 2010-12-15 | 上海奥威科技开发有限公司 | Low-temperature organic electrolyte taking gamma-butyrolactone as base solvent and application thereof |
-
2011
- 2011-02-18 CN CN2011100401624A patent/CN102142580A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1599120A (en) * | 2004-07-30 | 2005-03-23 | 北京科技大学 | Preparation of electrolytic additivef for increasing circuilation service life of lithium ion cell and using method |
| US20100047695A1 (en) * | 2008-08-19 | 2010-02-25 | California Institute Of Technology | Lithium-Ion Electrolytes Containing Flame Retardant Additives for Increased Safety Characteristics |
| CN101916878A (en) * | 2010-08-27 | 2010-12-15 | 上海奥威科技开发有限公司 | Low-temperature organic electrolyte taking gamma-butyrolactone as base solvent and application thereof |
Non-Patent Citations (3)
| Title |
|---|
| 姚万浩等: "锂离子电池电解液成膜添加剂乙烯基亚硫酸乙烯酯的电化学行为", 《化学学报》 * |
| 张国庆等: "锂离子电池低温电解液的研究进展", 《化工进展》 * |
| 林珩等: "锂离子电池SEI成膜添加剂的研究", 《漳州师范学院学报（自然科学版）》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104380517B (en) * | 2012-06-13 | 2018-01-02 | 中央硝子株式会社 | Battery with nonaqueous electrolyte electrolyte and use its battery with nonaqueous electrolyte |
| CN102780037A (en) * | 2012-07-19 | 2012-11-14 | 宁德新能源科技有限公司 | Nonaqueous electrolyte and lithium ion battery containing same |
| CN102780037B (en) * | 2012-07-19 | 2017-07-28 | 宁德新能源科技有限公司 | A kind of nonaqueous electrolyte and the lithium ion battery comprising the nonaqueous electrolyte |
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Application publication date: 20110803 |