Lg Energy Solution, Ltd.

Wongon Kim

Ki Young Lee

Hyeon Jin Song

Solji Yoo

A battery system includes a battery pack including a plurality of battery cells a pressure sensor located inside the battery pack to measure an internal pressure of the battery pack every sampling cycle, and a battery management system calculating a reference pressure based on an average of internal pressures measured at sampling cycles for a sampling period, calculating a pressure fluctuation amount based on a difference of the internal pressure measured every sampling cycle from the reference pressure, and determining that a thermal event has occurred in the battery pack if the internal pressure measured every sampling cycle increases consecutively at least two times when the pressure fluctuation amount is greater than or equal to a predetermined threshold pressure.

Battery system thermal event detection method and battery system using the same

Disclosed is a battery management system circuit, including: a substrate; a first resistor part disposed on the substrate and including a plurality of resistors; a second resistor part disposed on the substrate and including a plurality of resistors; and a first perforation formed by piercing the substrate between the first resistor part and the second resistor part, and the first perforation diffuses heat generated by the first resistor part and the second resistor part.

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Daejeon, South Korea

Wongon Kim