CHARGING APPARATUS AND QUALITY JUDGING APPARATUS FOR PACKED BATTERY
First Claim
1. A charging apparatus for charging a packed battery, the packed battery including a plurality of secondary cells connected in series, and the charging apparatus comprising:
- a voltage supply means supplying a predetermined charging voltage to the packed battery;
a cell voltage value detection means detecting cell voltage values of the respective secondary cells constituting the packed battery; and
a charging control means controlling the charging voltage supplied to the packed battery,wherein the charging control means comprises;
a dispersion degree calculation means calculating a dispersion degree of the secondary cells based on the cell voltage value detected by the cell voltage value detection means;
a maximum value specifying means specifying the maximum value of the cell voltage value based on the dispersion degree calculated by the dispersion degree calculation means;
a judging means judging whether or not the maximum value of the cell voltage value specified by the maximum value specifying means is larger than a preset permissible cell voltage value; and
a charging voltage value change means changing a value of the charging voltage impressed by the voltage supply means based on a voltage difference between the maximum value of the cell voltage value and the permissible cell voltage value when the judging means judges that the maximum value of the cell voltage value is larger than the permissible cell voltage value.
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Accused Products
Abstract
A charging apparatus and a quality judging apparatus for a packed battery should be configured to prevent reduction of charging/discharging performance at the time of charging the packed battery, to improve reliability of the packed battery, and to secure safety of the packed battery.
A charging controller is provided with a maximum value specifying means specifying a maximum value vmaxon of a cell voltage value based on a dispersion degree σ of a secondary cell, a third judging means judging whether or not the maximum value vmaxon of the cell voltage value, which is specified by the maximum value specifying means, reaches a permissible cell voltage value vc or not, and a charging voltage value change means changing a charging voltage applied by a voltage supply means based on a voltage difference between the maximum value vmaxon of the cell voltage value and the permissible cell voltage value vc when the third judging means judges that the maximum value vmaxon of the cell voltage value is larger than the permissible cell voltage value vc.
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Citations
10 Claims
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1. A charging apparatus for charging a packed battery, the packed battery including a plurality of secondary cells connected in series, and the charging apparatus comprising:
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a voltage supply means supplying a predetermined charging voltage to the packed battery; a cell voltage value detection means detecting cell voltage values of the respective secondary cells constituting the packed battery; and a charging control means controlling the charging voltage supplied to the packed battery, wherein the charging control means comprises; a dispersion degree calculation means calculating a dispersion degree of the secondary cells based on the cell voltage value detected by the cell voltage value detection means; a maximum value specifying means specifying the maximum value of the cell voltage value based on the dispersion degree calculated by the dispersion degree calculation means; a judging means judging whether or not the maximum value of the cell voltage value specified by the maximum value specifying means is larger than a preset permissible cell voltage value; and a charging voltage value change means changing a value of the charging voltage impressed by the voltage supply means based on a voltage difference between the maximum value of the cell voltage value and the permissible cell voltage value when the judging means judges that the maximum value of the cell voltage value is larger than the permissible cell voltage value. - View Dependent Claims (2, 3, 4, 8, 9)
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5. A quality judging apparatus for judging a quality of a packed battery, the packed battery including a plurality of secondary cells connected in series, and the quality judging apparatus comprising:
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a voltage supply means supplying a predetermined charging voltage to the packed battery; a cell voltage value detection means detecting cell voltage values of the respective secondary cells constituting the packed battery; and a quality judgment means judging a quality of the packed battery, wherein the charging control means comprises; a dispersion degree calculation means calculating a dispersion degree of the secondary cells based on the cell voltage values detected by the cell voltage value detection means; a maximum value specifying means specifying the maximum value of the cell voltage value based on the dispersion degree calculated by the dispersion degree calculation means; and a judging means judging whether or not the maximum value of the cell voltage value specified by the maximum value specifying means is larger than a preset permissible cell voltage value. - View Dependent Claims (6, 7, 10)
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Specification