Title:
充電状態制御装置
Document Type and Number:
Japanese Patent JP4187942
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a control method and device which control a charging status of a battery pack, comprising a plurality of unit cells, which are chargeable/dischargeable secondary batteries and connected in series with each other, and can regulate variations between the unit cells, using a simple constitution. SOLUTION: All discharge circuit Pi1-Pin, connected in parallel with respective unit cells Ci1-Cin have Zener diodes Dp, resistors Rp, and transistors Tp which are connected in series, respectively. By turning on/off a transistor Td, the starts and stops of the discharge circuits Pi1-Pin of respective cell groups CGi can be batch controlled. While the ignition switch is in off-state, charging of a battery pack which makes the voltages of all the unit cells C11-Cmn to be not lower than a regulation voltage (a reverse breakdown voltage of the Zener diode Dp) Vz, and discharging by the discharge circuits P11-Pmn are carried out, to make the voltages of all the unit cells C11-Cmn equal to the regulation voltage Vz.
Inventors:
Hiroshi Tamura
Yamayoshi Haruyoshi
Yamayoshi Haruyoshi
Application Number:
JP2001080672A
Publication Date:
November 26, 2008
Filing Date:
March 21, 2001
Export Citation:
Assignee:
株式会社デンソー
トヨタ自動車株式会社
トヨタ自動車株式会社
International Classes:
H02J7/02; B60L3/00; B60L11/18; B60L50/16; H01M10/44
Domestic Patent References:
| JP11234917A | ||||
| JP2001178003A | ||||
| JP2000092732A | ||||
| JP2001025173A |
Attorney, Agent or Firm:
Tsutomu Adachi