Circuit for adjusting charging rate of cells in combination
AssigneeSanyo Electric Co., Ltd.
InventorKimihiko Furukawa
Life of this patent
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Abstract
The invention provides a charging rate adjusting circuit for a cell combination 1 comprising cell modules 11 each comprising one or a plurality of cells and connected in series and adapted to uniformize the cell modules 11 in charging rate. The adjusting circuit comprises a pair of discharge lines 12, 13 extending from opposite electrodes of each cell module 11, a discharge resistor 2 and an on-off switch 3 provided between the discharge lines 12, 13, a timer circuit 4 comprising a CR circuit for feeding a control signal to a gate of the on-off switch 3, and a photocoupler 5 for initiating the circuit 4 into operation in response to a discharge command.
Claims7
A charging rate adjusting circuit for discharging electrochemical storage battery cells, of a cell combination comprising cell modules each comprising one or a plurality of cells and connected in series, the adjusting circuit being adapted to discharge at least one specified cell module among the plurality of cell modules in response to a discharge command so as to make uniform the plurality of cell modules connected to one another in series in charging rate or voltage, the charging rate adjusting circuit comprising
- a respective cell-discharge circuit connected to opposite electrodes of each of the cell modules, and
- a control circuit for controlling the operation of the discharge circuit, the control circuit comprising:
- opening-closing means for opening or closing the discharge circuit, and
- control means for holding the discharge circuit closed for a predetermined period of time to discharge the cell and keeping the discharge circuit open after the discharge circuit is opened, both in response to a discharge command.
Dependencies are inferred from the claim text.