Lg Chem, Ltd

Lg Energy Solution, Ltd.

Jin Sam Koo

Jong Hwa Lee

Kwang Soo Jeon

Dong Hyun Lee

Jun Hyuk Pack

Kyoung Min Kwon

Wook Park

Hyun Il Park

Hyoen Gu Jeon

Yang Hyun Huh

A method for detecting failure of a battery cell due to an unknown discharge current, including connecting a detector in series between the battery cell and a power supply for supplying a charging power, determining whether the charging of the battery cell progresses by the charging power in excess of a predetermined battery cell specific charging reference time, measuring a current value of the battery cell in real time if the charging of the battery cell progresses in excess of the battery cell specific charging reference time, determining whether the current value of the battery cell measured in real time exceeds a predetermined battery cell specific failure determination reference current range value, and determining a state of the battery cell as a failure state if the current value of the battery cell exceeds the predetermined battery cell specific failure determination reference current range value.

Apparatus and method for detecting battery cell failure due to unknown discharge current

An apparatus for inspecting the welding for a secondary battery includes: a measuring unit measuring a power value (P) supplied to the welding apparatus and a taken time (S) when the electrode tab and the electrode lead are welded to each other to obtain measured welding data (Data); an instrument unit obtaining a waveform representing a relationship between the power value (P) and the taken time (S) by using the measured welding data obtained by the measuring unit to display the waveform on a graph; and an inspection unit comparing the measured welding waveform displayed on the graph with a normal welding waveform to inspect whether the defective welding occur in real-time.

Apparatus and method for inspecting welding of secondary battery

Growing community of inventors

Cheongju-si, South Korea

Jin Sam Koo