What to Do When an Electric Vehicle Lithium Battery is Depleted and Cannot Charge?
2 Answers
Lithium batteries are not low-temperature batteries. In low-temperature environments, excessively low temperatures can cause increased internal resistance and reduced chemical activity. Moving to a suitable temperature environment should resolve the issue. Check the charging port. If the battery protection board triggers its protection function, preventing normal charging, a repair may be necessary in case of a malfunction. If a lithium battery is not charged for an extended period after automatic shutdown, it may become over-discharged and unable to charge. In this case, replacing it with a high-output charger can solve the problem. If the battery heats up during charging and quickly loses power or becomes completely uncharged when not in use, it is likely swollen or damaged and needs to be replaced.
I once encountered a situation where the lithium battery of my electric vehicle was depleted and couldn't be charged. That time, I had left the car unused for too long after a business trip, resulting in deep discharge of the battery, and the BMS system locked the charging function. At first, I was really panicked, but a friend suggested trying a low-current slow charging method: using the original home charger connected to a household socket, not rushing to charge at high power. After waiting for a few hours, it might wake up the battery and restart. That time, it took half a day to return to normal. Since then, I've remembered: don't let the battery level drop below 20%, especially in cold winter weather, and make sure to drive and charge the car at least once a week. If slow charging doesn't work, it's likely due to aging battery modules or a broken charger, and you must seek professional repair shops or arrange for towing. Don't mess around with it yourself, as burning it out would cost even more money.
