CN103280600A - Forming process of lithium iron phosphate battery - Google Patents
Forming process of lithium iron phosphate battery Download PDFInfo
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- CN103280600A CN103280600A CN2013101920745A CN201310192074A CN103280600A CN 103280600 A CN103280600 A CN 103280600A CN 2013101920745 A CN2013101920745 A CN 2013101920745A CN 201310192074 A CN201310192074 A CN 201310192074A CN 103280600 A CN103280600 A CN 103280600A
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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 provides a forming process of a lithium iron phosphate battery. The technical scheme is as follows: multi-step formation is adopted, in each step of formation, constant current is firstly adopted for charging, and then sine or cosine alternating current is used for charging and discharging, so that compact generation of a solid electrolyte interphase (SEI) on the surfaces of graphite particles of the negative electrode of the battery can be better enhanced, and the capacity fading in the use process of the battery is reduced. The forming process is used for manufacturing the lithium iron phosphate battery, and the cycle performance of the battery can be effectively improved.
Description
Technical field
The present invention relates to the lithium ion battery field, relate in particular to a kind of chemical synthesis technology of ferric phosphate lithium cell.
Background technology
Lithium ion battery is the secondary chemical sources of electric energy that is most widely used in the world at present.Little of electronic toy, bluetooth earphone, to energy-accumulating power station, national defence guided missile, can both use the different lithium ion battery of form greatly.Although the overall dimension of lithium ion battery thousand difference is outer, the lithium ion battery on the ordinary meaning all is to be made of basic raw material such as positive active material, plus plate current-collecting body, electrolyte, barrier film, negative current collector, negative electrode active material, housing and parts; Its operation principle is also roughly close.These raw material and parts are being mounted to together, form lithium ion battery, and its initial form does not have chemical energy, must could make that inside lithium ion cell is full of chemical energy through so-called changing into (initial charge).Lithium ion battery particularly ferric phosphate lithium cell to change into (initial charge) process very big to battery later stage performance impact because this process relate to battery electrode surface solid phase and liquid interface layer formation.The initial charge of ferric phosphate lithium cell is to carry out multistep constant current, constant voltage charge at charging/discharging apparatus at present, and the cycle performance of battery is undesirable, therefore presses for chemical synthesis technology is furtherd investigate.
Summary of the invention
The object of the present invention is to provide a kind of chemical synthesis technology that improves the ferric phosphate lithium cell of battery cycle life.
Technical scheme of the present invention is: the chemical synthesis technology of ferric phosphate lithium cell, and substep changes into, and its improvements are:
(1) at first with constant current with battery charge to 1～1.7V, sine or the cosine alternating current with 1～30Hz discharges and recharges again, the time is 0.5～2 hour;
(2) then with constant current charge to 2.9～3.3V, sine or the cosine alternating current with 1～30Hz discharges and recharges again, and the time is 0.5～2 hour;
(3) at last with constant current charge to 3.6～3.9 V, sine or the cosine alternating current with 1～30Hz discharges and recharges again, and the time is 0.5～2 hour.
Discharging and recharging of above-mentioned alternating current refer in the one-period of alternating current, and two half cycles charge respectively and discharge, and the peak value of alternating current is 0.1～0.3C, and unit is A, and wherein C is the numerical value of battery capacity.
Described constant current is 0.5～2A.
The present invention adopts multistep to change into, during per step changes into, earlier with constant current charge, discharge and recharge with sine or cosine alternating current again, can facilitate the densification of the solid electrolyte film (SE1 film) on battery cathode graphite granule surface to generate better, the vigor of further exciting electrode material, the conductive capability of enhancing inside battery, reduce the capacity attenuation in the battery use, thereby improve the cycle life of battery.
Embodiment
Further specify the present invention below by embodiment, and by test comparison good effect of the present invention is described.
Embodiment 1:
Under 23 ℃, be that the LiFePO4 flexible-packed battery to be changed of 10.3Ah places on the charging/discharging apparatus with design capacity, divided for three steps changed into the first step: adopt constant current 0.5A to charge the battery, the charging cut-ff voltage is 1.3V; Use 30Hz again, the 1.1A(peak value) sinusoidal ac discharges and recharges it, and the 0.5h time ends; Second step: change the 1A constant current charge, the charging cut-ff voltage is 3.0V; Use 5Hz again, the 1.1A(peak value) sinusoidal ac discharges and recharges it, and the 1h time ends; The 3rd step: change the 2A constant current charge, the charging cut-ff voltage is 3.6V, uses 1Hz, 2A(peak value again) sinusoidal ac discharges and recharges, and the 1h time ends.Battery changes into and finishes, and note is made BatA1.
Embodiment 2～5 operating procedures are with embodiment 1, and the substep chemical synthesis technology parameter list of embodiment 1～5 is as follows:
After the battery of embodiment 2～5 changed into, note was made BatA2～BatA5. respectively
Comparative Examples:
Under 23 ℃, be that the LiFePO4 flexible-packed battery to be changed of 10.3Ah places on the charging/discharging apparatus with design capacity; At first adopt constant current 0.5A to charge the battery, the charging cut-ff voltage is 1.3V; Change constant voltage 1.3V charging, the 0.5h time ends; Change the 1A constant current charge, the charging cut-ff voltage is 3.0V; Change constant voltage 3.0V charging, the 1h time ends; Change the 2A constant current charge, the charging cut-ff voltage is 3.6V, changes constant voltage 3.6V charging, and the 1h time ends.Battery changes into and finishes, and this chemical synthesis technology is made 5 batteries altogether, and note is made BatB1-BatB5 respectively.
BatA1-BatA5 in embodiment and the Comparative Examples and BatB1-BatB5 are amounted to 10 batteries under 23 ℃, carry out charge and discharge cycles with the 10A constant current, its battery capacity sees the following form with the variation of cycle-index:
Find out that from data the chemical synthesis technology of embodiment compares ratio, the raising of the cycle performance of ferric phosphate lithium cell is had apparent in view effect.
Claims (2)
1. the chemical synthesis technology of a ferric phosphate lithium cell changes into step by step, it is characterized in that:
(1) at first with constant current with battery charge to 1～1.7V, sine or the cosine alternating current with 1～30Hz discharges and recharges again, the time is 0.5～2 hour;
(2) then with constant current charge to 2.9～3.3V, sine or the cosine alternating current with 1～30Hz discharges and recharges again, and the time is 0.5～2 hour;
(3) at last with constant current charge to 3.6～3.9 V, sine or the cosine alternating current with 1～30Hz discharges and recharges again, and the time is 0.5～2 hour;
Discharging and recharging of above-mentioned alternating current refer in the one-period of alternating current, and two half cycles charge respectively and discharge, and the peak value of alternating current is 0.1～0.3C, and unit is A, and wherein C is the numerical value of battery capacity.
2. by the chemical synthesis technology of the described ferric phosphate lithium cell of claim 1, it is characterized in that described constant current is 0.5～2A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101920745A CN103280600A (en) | 2013-05-22 | 2013-05-22 | Forming process of lithium iron phosphate battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101920745A CN103280600A (en) | 2013-05-22 | 2013-05-22 | Forming process of lithium iron phosphate battery |
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| CN103280600A true CN103280600A (en) | 2013-09-04 |
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| CN2013101920745A Pending CN103280600A (en) | 2013-05-22 | 2013-05-22 | Forming process of lithium iron phosphate battery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449288A (en) * | 2015-12-22 | 2016-03-30 | 宁波南车新能源科技有限公司 | Formation method of ternary system battery capacitor |
| CN105900276A (en) * | 2014-01-09 | 2016-08-24 | 日产自动车株式会社 | Process for producing lithium ion secondary battery |
| CN106935912A (en) * | 2017-03-10 | 2017-07-07 | 江西佳沃新能源有限公司 | A kind of compound method for lithium ion battery |
| CN110783632A (en) * | 2019-11-07 | 2020-02-11 | 蒋子杰 | Formation method of lithium ion battery with mixed electrode |
| CN116995318A (en) * | 2023-09-25 | 2023-11-03 | 成都特隆美储能技术有限公司 | 3.2V formation process of lithium iron phosphate battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728579A (en) * | 2008-10-28 | 2010-06-09 | 天空能源(洛阳)有限公司 | Rapid forming method of lithium ion power battery |
| CN102760908A (en) * | 2012-07-16 | 2012-10-31 | 宁波世捷新能源科技有限公司 | Quick formation method for lithium ion battery adapting to various cathode material systems |
| JP2012227035A (en) * | 2011-04-21 | 2012-11-15 | Toyota Motor Corp | Method of manufacturing nonaqueous electrolyte secondary battery |
-
2013
- 2013-05-22 CN CN2013101920745A patent/CN103280600A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728579A (en) * | 2008-10-28 | 2010-06-09 | 天空能源(洛阳)有限公司 | Rapid forming method of lithium ion power battery |
| JP2012227035A (en) * | 2011-04-21 | 2012-11-15 | Toyota Motor Corp | Method of manufacturing nonaqueous electrolyte secondary battery |
| CN102760908A (en) * | 2012-07-16 | 2012-10-31 | 宁波世捷新能源科技有限公司 | Quick formation method for lithium ion battery adapting to various cathode material systems |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105900276A (en) * | 2014-01-09 | 2016-08-24 | 日产自动车株式会社 | Process for producing lithium ion secondary battery |
| CN105449288A (en) * | 2015-12-22 | 2016-03-30 | 宁波南车新能源科技有限公司 | Formation method of ternary system battery capacitor |
| CN106935912A (en) * | 2017-03-10 | 2017-07-07 | 江西佳沃新能源有限公司 | A kind of compound method for lithium ion battery |
| CN110783632A (en) * | 2019-11-07 | 2020-02-11 | 蒋子杰 | Formation method of lithium ion battery with mixed electrode |
| CN116995318A (en) * | 2023-09-25 | 2023-11-03 | 成都特隆美储能技术有限公司 | 3.2V formation process of lithium iron phosphate battery |
| CN116995318B (en) * | 2023-09-25 | 2023-12-01 | 成都特隆美储能技术有限公司 | 3.2V formation process of lithium iron phosphate battery |
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Application publication date: 20130904 |