	US 11,769,900 B2
	Lithium ion battery and prelithiation method of anode
Xiaogang Hao, Shanghai (CN); and Rongrong Jiang, Shanghai (CN)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 16/610,779
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed May 5, 2017, PCT No. PCT/CN2017/083159 § 371(c)(1), (2) Date Nov. 4, 2019, PCT Pub. No. WO2018/201427, PCT Pub. Date Nov. 8, 2018.
Prior Publication US 2020/0067129 A1, Feb. 27, 2020
Int. Cl. H01M 8/04 (2016.01); H01M 10/0525 (2010.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 10/44 (2006.01)

CPC H01M 10/0525 (2013.01) [H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 10/44 (2013.01)]

8 Claims

1. A method for prelithiating an anode of a lithium ion battery, comprising:

charging the lithium ion battery to a first voltage of from 4.2 V to 4.5 V at a first temperature; and

discharging the lithium ion battery to a second voltage from 2.5 V to 3.2 V at a second temperature, which is 20° C. to 40° C. lower than the first temperature in order to prelithiate the anode of the lithium ion battery,

wherein relative to a reversible lithium amount in the anode of the lithium ion battery which is not charged to the first voltage and discharged to the second voltage, the prelithiated anode of the lithium ion battery stores additional lithium, and

wherein the additional lithium is 5% to 25% by weight of the anode of the lithium ion battery.