Sunnyvale, California, United States
Multi-functional technology integrator, creating innovative products. Deep technical involvement in software, hardware, wireless communication protocols and RF, remote powering, battery management, EV and Hybrid drivetrains, renewable energy and environmental design, from weather-proof enclosures for telecom to thermal design and efficiency improvements. International Product Certification. Hands-on during the whole concept and design and test cycle. Daily driver is my electric truck with re-designed twin Nissan Leaf battery packs.
Upgrading my daily driver electric pickup truck to keep it on the road without factory support. Started an owners group of these US Electricar vehicles (mostly Factory conversion Chevy S10). Installed 2 parallel Nissan Leaf battery packs instead of the original lead-acid batteries. Still dealing with the solution to having 2 CAN buses to two (identical) battery management computers for the two packs. I have owned a total of 4 Electric trucks till date plus 3 Leafs and worked on over 2 dozen Leaf packs. My first US Electricar S10 daily driver was the earliest V2G demo that I could find, it was commissioned in 1995 to PG&E by the UK company WaveDriver. It had a bi-directional 3-phase 80Amp 208V charge port, a hand-modified AVCON (first installment of J1772).
Developed 3 generations of BMS (Battery Management Systems) for the 2nd life BESS (Battery Energy Storage System) for the Commercial and Industrial markets. All the way from concept ideas, architecture, circuit design, board layout and bring-up, debugging and integration into the final product. Voltages up to 1200V and 1/2 MWh of capacity in 20ft container! Besides the challenging electrical designs, I also supported the mechanical and thermal designs to guarantee that the battery modules under load stay within specified temperature limits, so heatpump and air flow designs were of major importance for the continuing health of the product.