The optimal ambient temperature range for EV charging typically falls between 0°C to 30°C (32°F to 86°F) according to general recommendations, though battery-specific analyses suggest a narrower 15°C to 35°C (59°F to 95°F) range for optimal lithium-ion performance during charging and discharging. Here’s a breakdown:
- Ideal operational range:
- 15°C–35°C (59°F–95°F) ensures minimal stress on lithium-ion batteries, balancing charging speed and long-term health.
- At 21.5°C (70°F), EVs often exceed their rated range, achieving up to 115% efficiency.
- Extended safe range:
- 0°C–30°C (32°F–86°F) is widely cited as the safe charging range, though performance gradually declines near the extremes.
- Temperature effects:
- Below 0°C (32°F): Sluggish electrochemistry reduces power output, while lithium plating risks accelerate degradation.
- Above 35°C (95°F): Accelerated electrolyte breakdown requires reduced charging speeds or active cooling to prevent damage.
For best results, precondition batteries while plugged in and use sheltered parking to mitigate temperature extremes.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/what-are-the-optimal-ambient-temperature-ranges-for-ev-charging/
