Apparatus and method for providing bidirectional voltage support
AssigneeMaxwell Technologies, Inc.
InventorRobert Shaw Lynds
Life of this patent
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Abstract
This disclosure provides systems, methods and apparatus for an energy storage system. In one aspect, the energy storage system includes a controller configured to connect a capacitor system in series with an output of a battery system during a regenerative event such that the voltage of the capacitor system is subtracted from the voltage of the battery system.
Claims32
An apparatus for providing bidirectional voltage support for an output of a battery system, comprising:
- a capacitor system comprising a positive terminal and a negative terminal;
- and
- a controller configured to:
- connect the negative terminal of the capacitor system to a positive terminal of a battery system and to connect the positive terminal of the capacitor system to the output of the battery system when a voltage of the output of the battery system is at or below a first voltage threshold, and
- connect the positive terminal of the capacitor system to the positive terminal of the battery system and to connect the negative terminal of the capacitor system to the output of the battery system when the voltage of the output of the battery system is at or above a second voltage threshold.
A method for providing bidirectional voltage support for an output of a battery system, comprising:
- providing a capacitor system comprising a positive terminal and a negative terminal;
- connecting the negative terminal of the capacitor system to a positive terminal of a battery system and connecting the positive terminal of the capacitor system to the output of the battery system when a voltage of the output of the battery system is at or below a first voltage threshold;
- and
- connecting the positive terminal of the capacitor system to the positive terminal of the battery system and connecting the negative terminal of the capacitor system to the output of the battery system when the voltage of the output of the battery system is at or above a second voltage threshold.
An apparatus for providing bidirectional voltage support for an output of a battery system, comprising:
- a capacitor system comprising a positive terminal and a negative terminal;
- a first switch configured to provide selective communication between the positive terminal of the capacitor system and the positive terminal of the battery system;
- a second switch configured to provide selective communication between the positive terminal of the capacitor system and the output of the battery system;
- a third switch configured to provide selective communication between the negative terminal of the capacitor system and the positive terminal of the battery system;
- a fourth switch configured to provide selective communication between the negative terminal of the capacitor system and the output of the battery system;
- and
- a fifth switch configured to provide selective communication between the negative terminal of the capacitor system and a charging circuit.
Dependencies are inferred from the claim text.