The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2024
Filed:
Aug. 11, 2022
Guangdong Brunp Recycling Technology Co., Ltd., Foshan, CN;
Hunan Brunp Recycling Technology Co., Ltd., Changsha, CN;
Yichang Brunp Contemporary Amperex Co., Ltd., Yichang, CN;
Haijun Yu, Foshan, CN;
Aixia Li, Foshan, CN;
Yinghao Xie, Foshan, CN;
Changdong Li, Foshan, CN;
Xuemei Zhang, Foshan, CN;
Yingsheng Zhong, Foshan, CN;
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD., Foshan, CN;
HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD, Changsha, CN;
YICHANG BRUNP CONTEMPORARY AMPEREX CO., LTD., Yichang, CN;
Abstract
A method for recycling and preparing a positive electrode material from waste lithium iron phosphate batteries. The method comprises the following steps: discharging, crushing, and stripping waste lithium iron phosphate batteries to obtain black powder; then mixing the black powder with benzenesulfonate, and reacting in a fluidized bed; and then adding an acid and an alkali to remove impurities, finally adding a lithium supplement, an iron supplement, or a phosphate, and a reducing agent, and sintering. According to the method, by controlling and optimizing the crushing, stripping, carbon and fluorine removal, and impurity removal processes, a positive electrode material with high purity can be recycled while controlling the recycling cost, and batteries prepared by means of the recycled positive electrode material have good performance.