Samsung Sdi Co., Inc.

Inseob Song

Junyoung Kim

Kwangmin Yoo

Cheolgi Son

Dongrak Kim

Jongrock Choi

Hyunjun Do

Jeongkurn Park

Sujun Park

Hwasu Kim

Junwon Suh

Sungwon Jeong

Seongjin An

Youngseung Na

Yeongchan Eun

Seokrak Chang

Gilltae Roh

Donguk Lee

A battery system includes a first battery, a second battery, and a battery manager. The first battery is electrically connected between a first node and a second node via a first module switch in a short circuit state. The second battery is electrically insulated from the first battery by a second module switch in an open circuit state. The battery manager detects a first battery voltage of the first battery, a second battery voltage of the second battery, and a system current flowing between the first and second nodes, determines an open circuit voltage of the first battery based on the first battery voltage and the system current, and short-circuits the second module switch when the open circuit voltage is substantially equal to the second battery voltage so that the at least one second battery is connected to the at least one first battery in parallel.

Battery system

A battery system includes a first battery pack, a second battery pack, a bidirectional power converter, and a current controller. The first battery pack includes at least one first battery cell. The second battery pack is connected to the first battery pack in parallel and includes at least one second battery cell. The bidirectional power converter is connected between the first battery pack and the second battery pack. The current controller sets a discharge current limit of the first battery pack based on a state of charge of the first battery pack and controls the bidirectional power converter to cause the first battery pack to output a discharge current that is less than or equal to the discharge current limit.

A fuel cell system with reduced volume through decreasing the thickness of a stack comprises: a stack which comprises a plurality of membrane electrode assemblies stacked so that the cathode electrodes face each other and the anode electrodes face each other, and separators that are interposed between the membrane electrode assemblies, and which have a flow path passing through from a first face to a second face on a region corresponding to a region where each cathode electrode or anode electrode is formed.

Monopolar separator with an insulation layer for a fuel cell system

Growing community of inventors

Yongin-si, South Korea

Inseob Song