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Title:
LITHIUM-ION BATTERY PRE-LITHIATION METHOD AND LITHIUM-ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/024404
Kind Code:
A1
Abstract:
The present invention relates to a lithium-ion battery pre-lithiation method and a lithium-ion battery. The method comprises: before an electrolyte is injected, providing more than one lithium source composite sheet in a core, and connecting the at least one lithium source composite sheet to a negative electrode tab of a lithium-ion battery; and injecting the electrolyte such that the electrolyte immerses the lithium source composite sheets, pre-lithiating the negative electrode. The lithium-ion battery obtained by the pre-lithiation method of the present invention has a high capacity, battery capacity can be increased by more than 10% year-on-year, the cycle life can be increased by more than 100%, and the specific energy of a soft pack lithium iron phosphate battery cell can be 230 Wh/Kg or above. In addition, industrialization is easy, and the comprehensive cost is very low.

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Inventors:
XU XINGWU (CN)
LIN SHAOXIONG (CN)
LIU CHAOHUI (CN)
Application Number:
PCT/CN2022/070955
Publication Date:
March 02, 2023
Filing Date:
January 10, 2022
Export Citation:
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Assignee:
HEFEI GOTION HIGH TECH POWER ENERGY CO LTD (CN)
International Classes:
H01M10/42; H01M4/13; H01M10/0525; H01M10/058
Domestic Patent References:
WO2020111746A12020-06-04
Foreign References:
CN113113679A2021-07-13
CN107768743A2018-03-06
CN111081982A2020-04-28
CN214099829U2021-08-31
JP2012009626A2012-01-12
CN1290209C2006-12-13
CN112310336A2021-02-02
CN112397682A2021-02-23
CN111430659A2020-07-17
CN105845894A2016-08-10
CN110224182A2019-09-10
CN110061299A2019-07-26
CN111969266A2020-11-20
Other References:
"Lithium Ion Battery Lithium Compensation Technology", ENERGY STORAGE SCIENCE AND TECHNOLOGY, vol. 10, May 2021 (2021-05-01)
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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