Electrical storage system made of capacitors
First Claim
1. An electrical storage system having a bank of capacitors for supplying a load, comprising:
- a charging means for charging said bank of capacitors;
a discharging means in parallel with the load capable of discharging said bank of capacitors; and
a temperature-detecting means for detecting temperature on or near said bank of capacitors, said temperature-detecting means causing said discharging means to discharge said bank of capacitors if the temperature detected by said temperature-detecting means is in excess of a preset temperature.
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Accused Products
Abstract
There is disclosed an electrical storage system comprising capacitors that are prevented from deteriorating at elevated temperatures. The electrical storage system is adapted for use in a hybrid electric vehicle or electric vehicle. The storage system comprises a bank of capacitors, a charger for charging the capacitor bank, a temperature switch connected across the capacitor bank and a discharge resistor connected in series with the temperature switch. The temperature switch is closed at a limit temperature (e.g., 70° C.) at which deterioration of the capacitors can be neglected in a fully charged condition. When the temperature of the capacitor bank reaches the limit value, the temperature switch is closed. The capacitor bank is discharged via both the temperature switch and the discharge resistor. This suppresses deterioration of the capacitors at elevated temperatures.
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Citations
13 Claims
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1. An electrical storage system having a bank of capacitors for supplying a load, comprising:
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a charging means for charging said bank of capacitors; a discharging means in parallel with the load capable of discharging said bank of capacitors; and a temperature-detecting means for detecting temperature on or near said bank of capacitors, said temperature-detecting means causing said discharging means to discharge said bank of capacitors if the temperature detected by said temperature-detecting means is in excess of a preset temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electrical storage system having a bank of capacitors for supplying a load, comprising:
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a charging means for charging said bank of capacitors that develops a terminal voltage thereacross; a temperature-detecting means for detecting temperature on or near said bank of capacitors; a discharging means in parallel with the load capable of discharging said bank of capacitors; a terminal voltage limit value-adjusting means for adjusting a limit value of said terminal voltage of said bank of capacitors so as to drop as the temperature detected by said temperature-detecting means rises; and a control means for causing said discharging means to discharge said bank of capacitors until said terminal voltage of said bank of capacitors reaches the limit value set by said terminal voltage limit value-adjusting means. - View Dependent Claims (12)
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13. An electrical storage system having a bank of capacitors for supplying a load, comprising:
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a charging means for charging said bank of capacitors that develops a terminal voltage thereacross; a temperature-detecting means for detecting temperature on or near said bank of capacitors; a discharging means in parallel with the load capable of discharging said bank of capacitors; a setting means for setting a limit value of said terminal voltage of said bank of capacitors; and a control means for causing charging of said bank of capacitors by said charging means to be limited by said limit value set by said setting means if the temperature detected by said temperature-detecting means is in excess of a preset temperature, said control means causing said discharging means to discharge said bank of capacitors to said limit value set by said setting means.
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Specification