Ultracapacitor and battery combination with electronic management system

摘要

This disclosure provides systems, methods and apparatus for a combined battery/capacitor energy storage device. The device includes a first device terminal, a second device terminal, a battery connected between the first terminal and the second terminal, and a capacitor connected in parallel with the battery. In one aspect, a rectifier is connected between the first terminal and the capacitor, the rectifier configured to allow substantially unidirectional current flow from the first terminal to the capacitor. In another aspect, a switch is between the capacitor and the first terminal. In another aspect, a current limiter extends between the first terminal and the capacitor.

主权项

1. An energy storage device, comprising:
a first device terminal and a second device terminal; a battery connected between the first device terminal and the second device terminal; a capacitor connected in parallel with the battery; a first switch between the capacitor and the first device terminal, the first switch configured to selectively control electrical communication between the capacitor and the first device terminal; and a controller configured to:
close the first switch in response to detection of a loss of external power to the first device terminal, andopen the first switch after the first switch has been closed for a predetermined period of time.