公开(公告)号：US20220407319A1

公开(公告)日：2022-12-22

申请号：US17767303

申请日：2019-09-16

Applicant: TECHTRONIC CORDLESS GP

Inventor： Hei Man Lee ,  Hai Lian ,  Dianwu Xu

IPC: H02J7/00 ,  H01M10/42 ,  H04L9/08

Abstract: In a battery charging system (100), a charger (110) and a smart battery (160) enhance safety in recharging a cell (180) in the smart battery (160) by a power supply (130) of the charger (110). The smart battery (160) is communicable with the charger (110). If a communication failure occurs, the charger (110) disconnects the power supply (130) from the smart battery (160). The smart battery (160) and the charger (110) share the same symmetric encryption key for encrypting and decrypting message data, allowing one party to determine if the other part is an authentic one. When the smart battery (160) finds that the charger (110) is not authentic, or vice versa, the power supply (130) and the cell (180) are disconnected. When the smart battery (160) finds that a no-charging condition occurs due to abnormality in the cell (180), the smart battery (160) requests the charger (110) to stop charging, and also disconnects the cell (180) from the charger (110) even if the charger (110) fails to stop charging the smart battery (160).