MUMBAI, India, Feb. 6 -- Intellectual Property India has published a patent application (202541122328 A) filed by Nandha Engineering College, Erode, Tamil Nadu, on Dec. 5, 2025, for 'thermoelectric based battery heat harvesting and power conversion system using dc-dc boost converters for ev autonomy.'
Inventor(s) include B. Ramraj; G. Kishore; R. Akash; and L Mohanaprasath.
The application for the patent was published on Feb. 6, under issue no. 06/2026.
According to the abstract released by the Intellectual Property India: "During charge/discharge cycles, electric vehicle (EV) battery packs frequently release 5- 15% of their input energy as waste heat, raising surface temperatures to 40-60 C without any kind of recovery mechanism. Conventional thermal management systems only passively reject this heat, which lowers efficiency and causes range anxiety. The energy-positive subsystem "Thermoelectric-Based Battery Heat Harvesting and Power Conversion System Using DC-DC Boost Converters for EV Autonomy" was created to solve this problem by recovering low-grade thermru energy (f1T -30 C) and transforming it into electrical power that can be used. Without the need for high-~T sources like exhaust, the system uses four TECI-12706 Peltier modules in thermoelectric generator (TEG) mode, mounted directly on the battery casing, to harvest surface heat and generate l.2V, 400mA (-Q.48W). This low-voltage DC is increased to a steady 5V, 300mA (-1.5W) supp.ly by an LM2577-based DC-DC boost converter that is integrated with a IOOJH inductor and a 47JF output capacitor. In order to ensure maximum power extraction and 75-85% end-to-end efficiency, an Arduino Nano microcontroller interfaced with voltage/current sensors uses a Perturb & Observe (P&O) MPPT algorithm to dynamically adjust the PWM duty cycle (20-80%) based on real-time thermal input. With no additional energy input, the recovered power extends the EV range by 2-5% by trickle~chaigirig secondary buffers or powering. auxiliary loads (sensors; cooling fans, and ECUs). By lowering the qattery. surface temperature by 3 to 8 C, active heat extraction prolongs battery life and lowers the risk of thermal runaway. The system, which uses off-theshelf components and can be retrofitted to existing EV battery packs without requiring significant changes, was created with simplicity and affordability in mind. For optimization, data-logging features monitor thermal performance and energy recovery. The system has demonstrated a consistent .l.5W output and a 5% increase in range during testing, particularly when driving at high loads. In general, this thermoelectric heat harvesting solution provides a useful, affordable way to enhance energy efficiency, promote sustainable mobility, and simplify EV operation for contemporary electric vehicles."
Disclaimer: Curated by HT Syndication.
