CN111600062B - A chemical synthesis method for improving the cycle life of silicon-carbon soft-pack lithium-ion batteries - Google Patents
A chemical synthesis method for improving the cycle life of silicon-carbon soft-pack lithium-ion batteries Download PDFInfo
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- CN111600062B CN111600062B CN201910220449.1A CN201910220449A CN111600062B CN 111600062 B CN111600062 B CN 111600062B CN 201910220449 A CN201910220449 A CN 201910220449A CN 111600062 B CN111600062 B CN 111600062B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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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Abstract
一种改善硅碳软包锂离子电池循环寿命的化成方法,包括采用温控设备对电芯进行低温静置处理;对电芯进行加压;对电芯梯度小倍率充电,第一阶段充电至可逆容量的6%~15%,充电电流范围为0.02C~0.05C;第二阶段充电至可逆容量的20%~40%,充电电流范围为0.05C~0.2C;第三阶段充电至可逆容量的30%~60%,充电电流范围为0.1C~0.6C;静置;老化;抽气、封装。本发明解决了现有技术中存在的硅碳材料易膨胀,影响其循环性能等问题,对硅碳软包锂离子电池,采用本发明工艺,提高了SEI膜的致密性、稳定性及一致性,从而一定程度上抑制硅碳负极材料循环过程中的膨胀,提升电池循环性能。
A formation method for improving the cycle life of a silicon-carbon soft-packed lithium-ion battery, comprising: using a temperature control device to perform a low-temperature static treatment on a cell; pressurizing the cell; 6%~15% of the reversible capacity, the charging current range is 0.02C~0.05C; the second stage is charged to 20%~40% of the reversible capacity, and the charging current range is 0.05C~0.2C; The third stage is charged to the reversible capacity 30%~60% of , the charging current range is 0.1C~0.6C; standing; aging; pumping, packaging. The invention solves the problems existing in the prior art that the silicon carbon material is easy to expand and affects its cycle performance, etc. For the silicon carbon soft-packed lithium ion battery, the process of the invention improves the compactness, stability and consistency of the SEI film , so as to suppress the expansion of the silicon carbon anode material during the cycle to a certain extent and improve the battery cycle performance.
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Families Citing this family (9)
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CN111883866B (en) * | 2020-09-08 | 2022-03-08 | 湖北亿纬动力有限公司 | Lithium ion battery formation process and lithium ion battery obtained by same |
CN112510265B (en) * | 2020-11-06 | 2022-11-29 | 天津力神电池股份有限公司 | One-step formation hot-pressing method for improving cycle performance of soft package lithium ion battery |
CN112582697A (en) * | 2020-12-15 | 2021-03-30 | 东莞维科电池有限公司 | Formation method of lithium ion battery |
CN112927951B (en) * | 2021-03-04 | 2022-09-23 | 富华德电子(东莞)有限公司 | Formation method of soft package lithium-carbon capacitor |
CN113078378B (en) * | 2021-04-08 | 2022-04-22 | 浙江超威创元实业有限公司 | Formation method of lithium battery |
CN114142094A (en) * | 2021-09-14 | 2022-03-04 | 惠州锂威新能源科技有限公司 | Lithium ion battery with silicon-based negative electrode and preparation method thereof |
CN114039099B (en) * | 2021-11-02 | 2023-06-30 | 远景动力技术(江苏)有限公司 | Lithium ion battery formation method and application thereof |
CN115425309B (en) * | 2022-09-28 | 2023-05-12 | 楚能新能源股份有限公司 | Efficient formation method of soft package battery |
CN116053601A (en) * | 2023-02-14 | 2023-05-02 | 江苏耀宁新能源创新科技有限公司 | A method for improving the wrinkle of battery diaphragm |
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CN108183262A (en) * | 2017-12-05 | 2018-06-19 | 山西长征动力科技有限公司 | A kind of chemical synthesizing method of high specific energy lithium ion soft-package battery |
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CN102820487B (en) * | 2012-07-23 | 2015-07-22 | 深圳市海太阳实业有限公司 | Lithium ion battery |
JP6323086B2 (en) * | 2014-03-12 | 2018-05-16 | Jnc株式会社 | Thermosetting resin composition and article using the same |
CN107403908A (en) * | 2017-07-05 | 2017-11-28 | 天津普兰能源科技有限公司 | A kind of method for suppressing lithium titanate battery flatulence |
CN107579302B (en) * | 2017-10-13 | 2018-10-19 | 骆驼集团新能源电池有限公司 | A kind of Soft Roll lithium ion power battery core rapid forming method |
CN108110333B (en) * | 2017-11-06 | 2019-09-20 | 超威电源有限公司 | A kind of lead-acid accumulator low temperature is internalized into test method |
CN108321436B (en) * | 2017-12-26 | 2021-02-26 | 合肥国轩高科动力能源有限公司 | Lithium ion battery formation and capacity-sharing method adopting silicon carbon as negative electrode |
CN108511826A (en) * | 2018-03-28 | 2018-09-07 | 中航锂电(洛阳)有限公司 | A kind of chemical synthesizing method of silicon-carbon soft bag lithium ionic cell |
CN109326827B (en) * | 2018-10-15 | 2021-05-11 | 珠海冠宇电池股份有限公司 | Standing method of lithium ion battery after liquid injection |
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CN108183262A (en) * | 2017-12-05 | 2018-06-19 | 山西长征动力科技有限公司 | A kind of chemical synthesizing method of high specific energy lithium ion soft-package battery |
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Effective date of registration: 20250408 Address after: No.6, Shenzhen Avenue, high tech Zone, Xiangyang City, Hubei Province, 441000 Patentee after: CAMEL GROUP XIANGYANG BATTERY Co. Country or region after: China Address before: 441000 No.18 Wuxi Road, high tech Zone, Xiangyang City, Hubei Province Patentee before: CAMEL GROUP NEW ENERGY CELL Co.,Ltd. Country or region before: China |
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Effective date of registration: 20250508 Address after: 441000 No.18 Wuxi Road, high tech Zone, Xiangyang City, Hubei Province Patentee after: Camel Group New Energy Battery Xiangyang Co.,Ltd. Country or region after: China Address before: No.6, Shenzhen Avenue, high tech Zone, Xiangyang City, Hubei Province, 441000 Patentee before: CAMEL GROUP XIANGYANG BATTERY Co. Country or region before: China |