Lg Energy Solution, Ltd.

Bum Hee Lee

Tae Wan Kim

Ui Seong Kim

The present disclosure relates to a secondary battery module that is capable of being disposed inside a secondary battery pack in various forms and being easily set in series or parallel between cells inside the secondary battery pack, thereby improving efficiency in designing the secondary battery pack. A secondary battery module according to the present disclosure includes: a plurality of cells comprising a first cell and a second cell which are facing each other, and a rotation member disposed between a surface of the first cell and a surface of the second cell facing the surface of the first cell, wherein the first cell is rotatable with respect to the second cell.

Secondary battery module

A battery resistance diagnosis device includes a current supply unit configured to supply a preset fixed current to a battery cell, a voltage measurement unit configured to measure an open circuit voltage of the battery cell while the fixed current is supplied, an external resistance calculation unit configured to calculate an external resistance value of the battery based on the fixed current and the open circuit voltage of the battery cell, and an abnormality diagnosis unit configured to diagnose a battery abnormality due to a voltage drop by comparing the calculated external resistance value with a preset external resistance value.

Growing community of inventors

Daejeon, South Korea

Bum Hee Lee