公开(公告)号：US20180175462A1

公开(公告)日：2018-06-21

申请号：US15898331

申请日：2018-02-16

Applicant: Medtronic, Inc.

Inventor： ERIK R. SCOTT ,  Gaurav Jain

IPC: H01M10/44 ,  H01M10/0569 ,  H01M4/131 ,  H01M4/485 ,  H01M4/583 ,  H01M10/0525

CPC classification number: H01M10/446 ,  H01M4/131 ,  H01M4/485 ,  H01M4/583 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2010/4292 ,  H01M2300/0028 ,  Y02E60/122 ,  Y02P70/54 ,  Y10T29/49108

Abstract: A method of charging a battery includes applying a charging voltage to a lithium-ion battery for a period of time after the battery is fully charged. The battery includes a positive electrode having a positive active material, a negative electrode having a negative active material, and an electrolyte. The negative active material includes a lithium titanate material and has a capacity that is less than that of the positive electrode. The charging voltage is greater than a fully charged voltage of the battery, and applying the charging voltage for the period of time is sufficient to cause a zero volt crossing potential of the battery to increase to above a decomposition potential of the positive active material.