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Patent Searching and Data


Title:
BATTERY CELL AND MANUFACTURING METHOD THEREFOR, BATTERY, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/169559
Kind Code:
A1
Abstract:
Disclosed are a battery cell and a manufacturing method therefor, a battery, and an electronic device. The manufacturing method for the battery cell comprises: providing a positive electrode piece substrate; providing a positive electrode active material on the surface of the positive electrode piece substrate to form a first positive electrode active material layer; and removing the positive electrode active material in an edge area of the first positive electrode active material layer, and then providing a second positive electrode active material layer with a conductivity not greater than 10^(-10)S/m on the area where the positive electrode active material is removed. The provision of a second active material layer with a conductivity not greater than 10^(-10)S/m on an edge area of a positive electrode piece of a battery cell can reduce the phenomenon of lithium metal deposition present in a negative electrode piece of the battery cell, so as to improve the service life of the battery cell.

Inventors:
YU, Yuying (Building A, Room #201 1 Qianwan 1st Road,Qianhai Shengang Cooperation Distric, Shenzhen Guangdong 0, 518000, CN)
Application Number:
CN2018/078175
Publication Date:
September 12, 2019
Filing Date:
March 06, 2018
Export Citation:
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Assignee:
SHENZHEN QIANHAI YOURONG TECHNOLOGY LTD (Building A, Room #201 1 Qianwan 1st Road,Qianhai Shengang Cooperation Distric, Shenzhen Guangdong 0, 518000, CN)
International Classes:
H01M4/04
Foreign References:
CN1469503A2004-01-21
JP2012028006A2012-02-09
CN101043090A2007-09-26
CN101640280A2010-02-03
Attorney, Agent or Firm:
CHINA WISPRO INTELLECTUAL PROPERTY LLP (A806, Zhongdi BuildingChina University of Geosciences Base,No. 8 Yuexing 3rd Road, High-Tech Industrial Estate, Nanshan Distric, Shenzhen Guangdong 7, 518057, CN)
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