Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1997-08-21
1999-05-18
Tso, Edward H.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320121, H01M10/46
Patent
active
059053607
ABSTRACT:
In an electric motor vehicle, a bidirectional boosting converter is placed in a battery circuit. A main contactor is turned off to disconnect one battery block from another and contactors are turned on to connect a first battery block to one terminal pair of the bidirectional boosting converter and to connect a second battery block to another terminal pair of the bidirectional boosting converter. A refreshing discharge of the first battery block or an equalizing charge of the second battery block is performed by boosting output of the first battery block and using this output to charge the second battery block. The boosting direction of the bidirectional boosting converter is changed to perform an equalizing charge of the first battery block or a refreshing discharge of the second battery block. The boosting direction is changed again to balance battery block SOCs, these by eliminating need for a charging device for equalizing charge or a discharging device for refreshing discharge.
REFERENCES:
patent: 5444354 (1995-08-01), Takahashi et al.
patent: 5592067 (1997-01-01), Peter et al.
patent: 5598088 (1997-01-01), Richter
Toyota Jidosha & Kabushiki Kaisha
Tso Edward H.
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