Does fast charging and slow charging of new energy vehicles affect battery life?
2 Answers
Fast charging and slow charging of new energy vehicles do affect battery life. The impacts of fast charging and slow charging on battery life are as follows: 1. Fast charging: Fast charging stores direct current (DC) directly into the battery, so the requirements for the battery are very high. The power of DC is large, and the charging process accelerates the flow of electrons from the positive to the negative electrode. Long-term or frequent use of fast charging can cause the battery temperature to rise, leading to faster battery degradation. 2. Slow charging: Slow charging uses alternating current (AC), with lower current and power compared to DC. Although the charging time is longer, it provides better protection for battery life and results in lower electricity costs.
Indeed, the charging methods for electric vehicles do impact battery lifespan. Based on my research into these technologies, fast charging uses high current for rapid charging, which is convenient but causes a sharp rise in internal battery temperature—akin to putting stress on the heart—accelerating battery aging and even leading to issues like lithium plating, potentially causing an early decline in range. In contrast, slow charging employs lower current for steady charging; though it takes longer, temperature control is better, preserving battery structure and extending lifespan. It's recommended that owners primarily use slow charging for daily needs, especially at home or workplaces for full charges, reserving fast charging only for occasional emergencies. Remember, while the battery management system monitors temperature to prevent overload, frequent fast charging may still leave it "overwhelmed." Developing good habits can save significant repair costs.
