Power control unit
First Claim
1. A power control apparatus for controlling charging and discharging of a plurality of storage means, said power control apparatus comprising:
- voltage measuring means for measuring voltages of each of said storage means;
current measuring means for measuring currents flowing through each of said storage means;
a status detecting means for detecting an operating status of each storage means, from values measured by said voltage measuring and current measuring means; and
a charging/discharging controlling means for controlling currents, voltages, or power according to the operating status of each storage means detected by said status detecting means, to charge or discharge said storage means;
wherein;
said status detecting means calculates an internal impedance or open circuit voltage of each storage means; and
said charging/discharging controlling means calculates a permissible charging or discharging current value of each storage means from its internal impedance, open circuit voltage, preset maximum permissible voltage and minimum permissible voltage, calculates a sum of all currents flowing through said storage means to suppress a current over the calculated permissible charging or discharging current from flowing into or out of each of said storage means, and controls the charging or discharging current to maintain the total current below the calculated total current value.
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Accused Products
Abstract
A power control apparatus for controlling charging and discharging of a plurality of storage means devices has a voltage measuring arrangement for measuring voltages of each of the storage devices, a current measuring arrangement for measuring currents flowing through each of the storage devices, a status detector for detecting the operating status of each storage device from values measured by the voltage and current measuring arrangements, and a charging/discharging control device for controlling currents, voltages, or power according to the operating status of each storage devices detected by the status detector to charge or discharge the storage devices.
61 Citations
13 Claims
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1. A power control apparatus for controlling charging and discharging of a plurality of storage means, said power control apparatus comprising:
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voltage measuring means for measuring voltages of each of said storage means; current measuring means for measuring currents flowing through each of said storage means; a status detecting means for detecting an operating status of each storage means, from values measured by said voltage measuring and current measuring means; and a charging/discharging controlling means for controlling currents, voltages, or power according to the operating status of each storage means detected by said status detecting means, to charge or discharge said storage means;
wherein;said status detecting means calculates an internal impedance or open circuit voltage of each storage means; and said charging/discharging controlling means calculates a permissible charging or discharging current value of each storage means from its internal impedance, open circuit voltage, preset maximum permissible voltage and minimum permissible voltage, calculates a sum of all currents flowing through said storage means to suppress a current over the calculated permissible charging or discharging current from flowing into or out of each of said storage means, and controls the charging or discharging current to maintain the total current below the calculated total current value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A power control apparatus for controlling charging of a plurality of storage means, said power control apparatus comprising:
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voltage measuring means for measuring voltages of each of said storage means; current measuring means for measuring currents flowing through each of said storage means; a status detecting means for respectively calculating internal impedances and open circuit voltages of each of said storage means, from values measured by said voltage and current measuring means; and a charging current controlling means which calculates a permissible charging current value of each storage means from its internal impedance or open circuit voltage and a preset maximum permissible charging voltage which are detected by said status detecting means, calculates a sum of all currents flowing through said storage means to suppress a current over the calculated current from flowing into said storage means, and controls the charging current to maintain the total current below the calculated total current value. - View Dependent Claims (11)
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12. A power control apparatus for controlling discharging of a plurality of storage means, said power control apparatus comprising:
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voltage measuring means for measuring voltages of each of said storage means; current measuring means for measuring currents flowing through each of said storage means; a status detecting means for calculating internal impedances and open circuit voltages of said storage means, from values measured by said voltage and current measuring means; and a discharging current controlling means which calculates a permissible discharging current value of each storage means, from its internal impedance or open circuit voltage and a preset maximum permissible discharging voltage which are detected by said status detecting means, calculates a sum of all currents flowing through said storage means to suppress a current over the calculated current from flowing from said storage means, and controls the discharging current to maintain the total current below the calculated total discharging current value. - View Dependent Claims (13)
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Specification