David Ridley Email & Phone Number

Kirkland, Wa, Us

Consulting on energy storage product development and project deployment.

Redmond, Washington, Us

Developing flow battery technology for applications in the data center.

Arlington, Washington, Us

Responsible for the electrical system engineering design and validation of the battery packs and power distribution system for the Alice all electric commuter aircraft targeted for 2024 commercial operations.● Developed build documentation for the high voltage distribution system on the prototype aircraft● Validating the prototype ESS against safety of flight criteria and reliability standards● Wrote test procedures for validating a DC converter and backup battery system for auxiliary power● Architecting the next generation high voltage distribution system for the certification candidate

Responsible for the development of a containerized flow battery product including control electronics, power electronics, real time control software development, and supervisory data acquisition software.● Deployed 10 projects up to 2MW, integrated with multiple power electronics and software providers● Defined the product development roadmap and product architecture for our energy storage systems● Specified power conversion systems and partnered with manufacturers for our AC integrated products● Lead the design of the battery management system, specification, component selection, and production● Managed development of real-time and supervisory software to control and optimize the system● Created documentation for product marketing, user manuals, test reports, and requirements definition● Scaled our product designs from prototype to high volume production over seas● Worked with testing labs to achieve UL 1973 certification for our products

Hayward, Ca, Us

Manage and lead the electrical and controls engineering group. Responsible for control electronics, power electronics, real time control software development, and supervisory control software.● Designed the state logic for the alpha prototype of our 20kW battery module and managed the software development for the real time controller (PLC)● Lead a team of engineers in the development of SCADA software to control our various systems● Developed a specification then conducted a market survey and vendor selection process for a 500kW grid-tie bidirectional inverter● Integrated numerous test stands based on Labview and the cRIO platform for characterizing and developing various aspects of our technology● Lead test stand software development, created a unified platform architecture which was adapted to each set of specific test stand hardware

Lead engineer for all embedded control and custom sensor design. Responsible for all PCB design, system control state logic design, and all aspects of system integration including power electronics.● Designed and implemented a low cost, microcontroller based, embedded controller to replace the prototype PLC solution, reduced the controller cost by a factor of 10● Established software architecture, designed the state machine, and wrote the embedded code● Developed PID control loops for system temperature, methanol concentration, water balance● Wrote a windows based GUI using python for in-house data acquisition and system testing● Designed and patented a methanol concentration sensor based on an electrochemical cell● Designed the electronics and mechanical packaging for a semi-continuous, liquid level sensor based on low cost hall effect switches, achieved 3x lower cost than any competing solution● Designed a 72 channel individual cell voltage monitoring system with elastomeric connector● Designed a 200W sensorless brushless dc motor controller with variable inductance commutation