To provide a voltage detection device capable of preventing variation in a unit cell by making current consumption of each voltage detection means constant.
Battery monitoring ICs 21-2n operate by respectively receiving power supplied from corresponding blocks CB1-CBn, and respectively detect both-end voltages of unit cells C11-Cmn configuring the corresponding blocks CB1-CBn. A main microcomputer 3 receives detection results of the battery monitoring ICs 21-2n. The plurality of battery monitoring ICs 21-2n are communicably connected in series, and one battery monitoring IC 2n and the main microcomputer 3 are communicably connected via an insulation I/F 4. There are provided pull-down resistors R1-Rn-1 applied with currents from the blocks CB1-CBn-1 corresponding to the battery monitoring ICs 21-2(n-1) other than the battery monitoring IC 2n communicably connected with the main microcomputer 3 via the insulation I/F 4, and thereby, making currents consumed at the battery monitoring ICs 21-2n uniform.
| JP2010081692A | 2010-04-08 | |||
| JP2003017134A | 2003-01-17 | |||
| JP2011182550A | 2011-09-15 |
| WO2011135868A1 | 2011-11-03 |
Takao Kawasaki
Fumio Takino
Toshiaki Tsuda
Masashi Torino
Park Ji-un