What is the maximum charging temperature for new energy vehicle batteries?
2 Answers
New energy vehicle batteries should not exceed 40 degrees Celsius during charging. The charging methods for new energy pure electric vehicles are as follows: 1. Slow charging (conventional charging, onboard charging): Suitable for onboard chargers and home wall-mounted charging piles, with relatively low current and power, typically requiring 6-8 hours for a full charge. 2. Fast charging (ground charging, emergency charging): Includes charging stations and mobile charging vehicles, primarily using non-onboard chargers to deliver high current directly to the battery, allowing the battery to reach approximately 80% charge in a short time, usually within 1 hour. 3. Battery replacement: When the power battery is depleted, replace the low-charge battery pack with a fully charged one, and send the replaced battery to the swap station for slow charging. 4. Wireless charging: Automatically connects to the power grid for charging and discharging through wireless charging panels embedded in roads and parking spaces without the use of wires or cables. This method is convenient and safe but has not yet been mass-produced or widely used.
I've been driving a new energy vehicle for several years and always pay special attention to temperature during charging. The battery temperature should ideally not exceed 45 degrees Celsius. Charging in direct sunlight during summer can easily cause overheating. I remember one time when I charged outdoors, the temperature rose to 47 degrees, and afterward, the battery range noticeably decreased. The ideal charging range is between sub-zero and around 40 degrees. Exceeding the temperature limit can accelerate the aging of internal materials, shorten the battery's lifespan, and in severe cases, may lead to overheating or even fire. Now, I make it a habit to charge in the garage or in shaded areas, and during fast charging, I frequently monitor the temperature display on the car's screen. Charging at high temperatures causes faster battery degradation, reducing its lifespan by an average of 20%. It's also important to avoid charging during cold snaps when temperatures are low—generally, if it's below 0 degrees, I preheat the battery before charging. During every maintenance check, I ensure the cooling system is functioning properly to maintain smooth operation.
