Enhancing electric vehicle battery charging efficiency through advanced DC to DC conversion in solar PV-integrated PRHGHECIC for improved energy storage

This article presents a new dc-dc converter configuration, the Pseudo-Resonating Higher-Gain Higher-Efficiency Coupled-Inductor Converter (PRHGHECIC), tailored for effectively storing solar photovoltaic energy in electric vehicle batteries. This single-switched approach integrates coupled inductors (CL) and a voltage multiplier with a passive lossless clamping circuitry to enhance energy storage efficiency. The innovative design achieves a notably high voltage conversion ratio while reducing stress on semiconductor components. By utilizing coupled inductors and triggering switches, the converter minimizes switching losses through pseudo-resonance operation and regenerative clamp capacitors, making it particularly suitable for energy storage in electric vehicles. The article elaborates on the converter's functioning, steady state, and performance in continuous conduction mode, backed by MATLAB simulation results showing an impressive 98.6 % efficiency with only 4.75 watts of loss in a 340 W/120 V design. Additionally, with an 180 W/60 V sample prototype with 4.32 watts of loss is presented, confirming the theoretical analysis at a 60 kHz switching frequency. •The Pseudo-Resonating Higher-Gain Higher-Efficiency Coupled-Inductor Converter (PRHGHECIC) optimizes solar photovoltaic energy storage in EV batteries, enhancing conversion and storage efficiency.•Integrating coupled inductors, a voltage multiplier, and passive lossless clamping circuitry into a single-switch topology reduces power losses, improving energy storage efficiency and system reliability.•PRHGHECIC achieves a high voltage conversion ratio with minimal semiconductor stress, ensuring enhanced durability and reliability.•Detailed analysis and MATLAB simulations demonstrate the converter's operation and efficiency, achieving 98.6% efficiency with only 4.75W loss in a 340W/120V configuration; an 180W/60V prototype validates theoretical analyses.•Closed-loop investigation with MPPT and PI-tuned GWO improves system performance under varying conditions, optimizing MPPT operation and battery state-of-charge accuracy.