What is the energy source of electric vehicles?
2 Answers
Electric vehicles derive their energy from storage batteries. Here are specific details about electric vehicle batteries: 1. Concept: Ternary lithium batteries, also known as "ternary polymer lithium batteries," refer to lithium batteries that use lithium nickel cobalt manganese oxide or lithium nickel cobalt aluminate as the cathode material. Due to their smaller size, higher energy density, and better performance in low temperatures, ternary lithium batteries are currently widely used in new energy vehicles. For example, all Tesla models use ternary lithium batteries. 2. Lifespan: The lifespan of a ternary lithium battery is 2000 charge-discharge cycles. It is recommended to charge the battery as needed and avoid depleting it completely before charging. An excellent battery management system can also slow down the degradation of ternary lithium batteries.
The primary energy source for electric vehicles is the onboard battery pack, typically lithium-ion type, which stores electrical energy to power the motor. I find the charging process straightforward – simply plug into a household outlet or public charging station to replenish energy from the grid. The grid electricity may come from coal, nuclear, or renewable sources depending on the region; opting for nighttime charging or green energy providers enhances environmental friendliness. The battery management system monitors charge status and temperature to prolong service life. During daily driving, the energy conversion efficiency from electricity to kinetic energy reaches up to 90%, far surpassing the 20-30% of fuel-powered vehicles. Regular maintenance practices like avoiding deep discharges optimize performance. Modern EVs also support fast-charging technology, reaching 80% charge in half an hour for greater long-distance travel convenience. While electricity remains the core energy source, intelligent software coordinates charging cycles to minimize waste.
