Ultracapacitor and battery combination with electronic management system
First Claim
Patent Images
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.
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Abstract
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.
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Citations
28 Claims
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1. An energy storage device, comprising:
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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, and open the first switch after the first switch has been closed for a predetermined period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 24)
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18. An energy storage device, comprising:
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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; a second switch between the battery and the first device terminal, the second switch configured to selectively control electrical communication between the battery and the first device terminal; and a controller configured to; close the first switch and open the second switch when a voltage of the first device terminal increases above a first threshold, and close the second switch when an output voltage of the capacitor is above a second threshold. - View Dependent Claims (19, 20, 21, 22)
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23. An energy storage device, comprising:
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a first device terminal and a second device terminal; a battery connected between the first terminal and the second terminal; a capacitor connected in parallel with the battery; a first switch between the capacitor and the first terminal, the first switch configured to selectively control electrical communication between the capacitor and the first terminal; and a DC/DC converter connected between the first device terminal and a third device terminal positioned between the first device terminal and the capacitor, the DC/DC converter comprising; a first rectifier; a second switch connected between the second device terminal and the first rectifier; a boost controller configured to control the switch; an inductor connected in series with the first rectifier between the first device terminal and the first rectifier; and a second rectifier connected between the first device terminal and the third device terminal and in parallel with the first rectifier and the inductor. - View Dependent Claims (25, 26, 27, 28)
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Specification