Energy storage device and loads having variable power rates
First Claim
1. A power source for supplying electrical power to a driving motor, said driving motor drawing electrical power at different rates, the power source comprising:
- a first rechargeable energy battery having a first energy density for storing electrical energy;
a second rechargeable power battery having a second energy density, less than the first energy density, for storing electrical energy and providing electrical power to the electrical motor at the different rates;
a battery controller capable of controlling the substantially continuous recharging of the power battery with electrical energy from the energy battery; and
wherein electrical energy stored in the energy battery is supplied to the electrical motor through the power battery and at the different rates.
4 Assignments
0 Petitions
Accused Products
Abstract
An electrical energy storage device for storing electrical energy and supplying the electrical energy to a driving motor at different power levels is disclosed. The electrical storage device has an energy battery connected to a power battery. The energy battery has a higher energy density than the power battery. However, the power battery can provide electrical power to the electrical motor at different power rates, thereby ensuring that the motor has sufficient power and current when needed. The power battery is continuously recharged by the energy storage battery. In this way, the power battery temporarily stores electrical energy received from the energy battery and provides the electrical energy at the different power rates as required by the motor. The energy storage device can be releasably connected to an external power source in order to recharge both batteries. Both batteries can be recharged independently to optimize the recharging and lifetime characteristics of the batteries.
122 Citations
24 Claims
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1. A power source for supplying electrical power to a driving motor, said driving motor drawing electrical power at different rates, the power source comprising:
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a first rechargeable energy battery having a first energy density for storing electrical energy;
a second rechargeable power battery having a second energy density, less than the first energy density, for storing electrical energy and providing electrical power to the electrical motor at the different rates;
a battery controller capable of controlling the substantially continuous recharging of the power battery with electrical energy from the energy battery; and
wherein electrical energy stored in the energy battery is supplied to the electrical motor through the power battery and at the different rates. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An energy storage device for storing electrical energy to be delivered to an electrical load, said energy storage device comprising:
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a rechargeable battery having a first energy density and electrically connectable to an external power source;
a rechargeable electrical device having a second energy density, less than the first energy density, said second battery being electrically connectable to the first battery and electrically connectable to the load;
wherein, during operation, the rechargeable electrical device is connected to the load and supplies electrical energy to the load while the battery substantially continuously recharges the rechargeable electrical device; and
wherein the battery is periodically connected to the external source for recharging as required. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for storing electrical energy for an electrical load drawing electrical power at different rates, said method comprising:
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charging a rechargeable energy battery having a first energy density;
charging a rechargeable power battery having a second energy density, less than the first energy density;
supplying electrical energy from the power battery to the electrical load at the different rates;
recharging the power battery from the energy battery. - View Dependent Claims (21, 22, 23, 24)
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Specification