Capacity leveling circuit for a battery group
AssigneeJapan Storage Battry Co., Ltd.
InventorsDaisuke Konishi, Yoshihiko Mizuta
Life of this patent
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Abstract
Voltage dividing circuits P1 to P3 are connected between the GND line connected to a battery B and the positive terminals of cells C1 to C3, respectively. Correcting discharging circuits D1 to D3 are connected between an output line on the side of the positive terminal of the battery B and the positive terminals of the cells C1 to C3, respectively. The amounts of discharges of the cells due to the correcting discharging circuits D1 to D3 are set to be equal to those of the cells due to the voltage dividing circuits P1 to P3, respectively, thereby leveling the capacities of the cells.
Claims12
A capacity leveling circuit for a battery group comprising:
- a battery group formed of a plurality of cells in series;
- voltage dividing circuits connected between one of output terminals of said battery group and output terminals on one side of said cells;
- and,
- correcting discharging circuits connected between another output terminal of said battery group and said one output terminal of each of said cells, one output terminal of each of said cells being connected to voltage dividing circuits;
- wherein amounts of discharges of each of said cells in said correcting discharging circuits are set to be equal to amounts of discharges of each of cells in said voltage dividing circuits.
A method of leveling a capacity of a battery group, comprising a step of:
- in voltage dividing circuits being connected between one of output terminals of said battery group and output terminals on one side of cells, measuring voltages of said cells respectively;
- in correcting discharging circuit being connected between another output terminal of said battery group and said one output terminal of each of said cells, one of said voltage dividing circuits being connected to said one output terminal, said cells being not connected to said one voltage dividing circuit in series, discharging said cells;
- and,
- setting the amounts of discharges of said cells in said correcting discharging circuits, and those of each of said cells in said voltage dividing circuits to be equal to one another.
Dependencies are inferred from the claim text.