Actual measurement of the real mileage attenuation of electric vehicle batteries in the extremely cold winter environment in Europe

Lithium batteries are naturally sensitive to cold, which is an open secret in the European micro-mobility industry. When the winter temperature plummets to minus 5 degrees, the mileage data marked on your product page will be marked with a big question mark. The EIP performance evaluation room put four mainstream E-Bikes into industrial-grade walk-in freezers for full freezing, and then the testers conducted compression tests on real extremely cold roads. Actual measurement data shows that traditional ordinary lithium battery packs without any thermal insulation coating and intelligent heating algorithm experience a cliff-like mileage attenuation of **35% to 42%** in subzero environments. This is because the viscosity of the electrolyte increases at low temperatures and the internal resistance increases sharply. However, Nine Company’s models equipped with the self-developed fully-sensing intelligent BMS system and first-tier brands with fine power and thermodynamic protection layers have shown strong cold resistance, and the mileage shrinkage is controlled within a more gentle 18%. This is due to the fact that they limit the instantaneous ultra-large current output at the software level and use the motor’s self-heating technology to perform thermal compensation for the battery core. A rule of thumb for consumers: Do not charge in a low-temperature garage immediately after riding in winter. You must bring it indoors to warm up to prevent lithium dendrites from precipitating and damaging the battery core.