Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Yuuki Kuwano

Yosuke Shimizu

Osamu Yamazaki

Mami Mizutani

Morio Suzuki

Takashi Akiba

Fumiyuki Yamane

Takashi Morimoto

Keizo Hagiwara

Jin Kato

Atsumi Kondo

Takehiro Usumori

Hironobu Aoki

Kenichi Kikkawa

A battery pack for an electrically driven automobile includes plural battery banks, a battery management unit that detects current flows, voltages and temperatures, first and second terminals connected respectively to the positive and negative electrode terminals of the battery banks, plural third and fourth terminals connected respectively to the positive and negative electrode terminals of the battery banks, a main contactor that switches the connection between the positive electrode terminals of the battery banks and the first terminal and the connection between the negative electrode terminals of battery banks and the second terminal, sub-contactors that switch the connection between the positive electrode terminals of the battery banks and the first terminal, and charging sub-contactors that switch the connection between the positive electrode terminals of the battery banks and the third terminals and the connection between the negative electrode terminals of the battery banks and the fourth terminals, respectively.

Battery pack and electrically driven automobile

An assembled battery system is disclosed that includes a plurality of serially-connected battery cells; voltage detecting lines connectable at one ends to electrodes of the battery cells of the assembled battery; electric resistors serially-connected at one ends to the other ends of the voltage detecting lines; capacitors connected to the other ends of the electric resistors, each of the capacitors being configured to electrically interconnect one of the voltage detecting lines and the other voltage detecting line; voltage measuring circuits connected respectively to each of the voltage detecting lines; electrically openable short-circuiting switches arranged between the capacitors and the voltage measuring circuits and parallel-connected to the capacitors; and a monitoring circuit that detects a difference between a first measurement result and a second measurement result with respect to each of the short-circuiting switches and a failure of the voltage detecting lines, the short-circuiting switches or the voltage measuring circuits.

Assembled battery system and failure detection method of assembled battery system

Growing community of inventors

Tokyo, Japan

Yuuki Kuwano