Maxwell Technologies, Inc.

Ucap Power, Inc.

Robert Shaw Lynds

John Michael Miller

Thomas J Dougherty

Priya Bendale

Ilya Kaminsky

Mikael Setterberg

Ulf Carl Mikael Setterberg

Jeremy Michael Cowperthwaite

Christopher James

Liesel Mathew Chiriyankandath

Ha Q Hung

Carl David Wright

Rong Yan

Magnus Lindbäck

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 first capacitor system and a second capacitor system in series with an output of a battery system during a high current demand event such that the voltage of the output of the battery system is supported within the voltage constraints of the output of that battery system.

Parallel string voltage support

In one aspect, the invention comprises an apparatus for balancing cells in a series string of modules having cells. The apparatus comprises a processing system and a communication circuit. The processing circuit is configured to receive an average cell voltage value from each module. The processing circuit is further configured to determine an overall average cell voltage for all the cells. The processing circuit is also configured to cause each the modules to determine a relative capacitance for each of its cells and cause each of the modules to balance its cells based on the respective relative capacitances. The communication circuit is configured to receive the average cell voltage value from the modules.

Systems and methods for capacitor module balancing and maintenance

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.

Apparatus and method for providing bidirectional voltage support

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.

Ultracapacitor and battery combination with electronic management system

This disclosure provides systems, methods and apparatus for managing a capacitor system. In one aspect, an energy storage system includes a capacitor system, a charging circuit, and a controller. The capacitor system includes one or more capacitors. The charging circuit is configured to charge the capacitor system to a first target voltage. The controller is configured to detect a first condition and is programmed, in response to the first condition, to instruct the charging circuit to charge the capacitor system to a second target voltage that is less than the first target voltage. The controller is programmed to provide a notification that the capacitor system is operating in a degraded state.

System and methods for managing a degraded state of a capacitor system

Growing community of inventors

La Mesa, CA, United States of America

Robert Shaw Lynds