Kinestral Technologies, Inc.

Halio, Inc.

Douglas Frederick Brainard

Walter Thomas Barnum

Luis Fernando Gomez

Hugues Duncan

A overcharge-aware electrochromic device driver for preventing overcharge of an electrochromic device is described. One driver applies a constant supply current to an electrochromic device from a power supply. The driver determines an amount of charge as a function of time and current supplied to the electrochromic device. The driver determines whether the amount of charge reaches an overcharge limit before a sense voltage reaches a first sense voltage limit. Responsive to the amount of charge reaching the overcharge limit, the driver sets the sense voltage as a second sense voltage limit that is lower than the first sense voltage limit, ceases the constant supply current, and applies one of a variable voltage or a variable current to the electrochromic device from the power supply to maintain the sense voltage at the second sense voltage limit.

Overcharge-aware driver for electrochromic devices

A distributed energy management system (EMS) for supplying power to a set of drivers that charge and discharge a set of electrochromic devices is described. One distributed EMS includes an external power supply interface to couple to an external power supply, a multi-device boost power supply comprising a set of batteries, and a driver interface to supply power to a set of drivers that charge and discharge a set of electrochromic devices. The distributed EMS also includes a communication subsystem to communicate with the set of drivers and EMS circuitry to supply power to the set of drivers, via the driver interface, based on a power state of the multi-device boost power supply and a state of the set of electrochromic devices.

Growing community of inventors

Farmington, UT, United States of America

Douglas Frederick Brainard