| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an efficient energy storage device for use in relatively large load situations, such as for an electrical vehicle, and having a high specific energy and energy density, while still being capable of providing large bursts of power in a thermally manageable manner. <P>SOLUTION: 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. 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 can be recharged by the energy battery. In this way, the power battery temporarily stores electrical energy received from the energy battery and both batteries can provide 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. <P>COPYRIGHT: (C)2012,JPO&INPIT |
