公开(公告)号：US20170244255A1

公开(公告)日：2017-08-24

申请号：US15439867

申请日：2017-02-22

Applicant: Dongguan Amperex Technology Limited ,  Ningde Amperex Technology Limited

Inventor： Fuping Luo ,  Shengwei Wang ,  Chao Gao ,  Qiang Zheng

IPC: H02J7/00 ,  H01M10/0525 ,  H01M10/44

CPC classification number: H02J7/007 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/44 ,  H02J7/008 ,  Y02T10/7011

Abstract: A method for charging a lithium ion battery includes the steps of: 1) determining a maximum charging current I0 and a lowest anode potential η of the lithium ion battery at which no lithium precipitation occurs; 2) charging the lithium ion battery at a constant current of I1 which is greater than I0 for a charging time t1; 3) discharging the lithium ion battery at a constant current of I2 which is less than I0 for a discharging time t2, 5≦t1/t2≦50; 4) repeating steps 2) and 3) until a cutoff voltage of the lithium ion battery reaches V0 and standing the lithium ion battery for a standing time t3; and 5) charging the lithium ion battery at a constant current of I0 until the cutoff voltage of the lithium ion battery reaches V0 and charging the lithium ion battery to a cutoff current of I3 at a constant voltage.