How is the small battery of new energy vehicles charged?
2 Answers
New energy vehicle small batteries are charged via charging piles and charging stations. Charging methods for new energy vehicles: To date, there are only two charging methods for new energy vehicles: fast charging and slow charging. Fast charging and slow charging are relative concepts. Generally, fast charging refers to high-power DC charging, with most new energy vehicles supporting fast charging capable of reaching 80% capacity in about half an hour. Slow charging, on the other hand, is AC charging, typically requiring 6 to 8 hours to complete. Charging precautions: Excessively low battery levels can easily lead to power battery depletion, and prolonged depletion can severely damage the power battery. When using an electric vehicle, it is best to practice shallow charging and discharging, meaning frequent charging is advisable.
In my years of experience repairing cars, the auxiliary battery in new energy vehicles is charged by the main high-voltage battery system. Simply put, once the vehicle is started, there's a built-in DC-DC converter that steps down the high voltage from the main battery to recharge the auxiliary battery. It's like charging a phone—this process happens automatically when the car is running or connected to an external charger. If you don't drive for an extended period, the auxiliary battery may drain, leading to issues like failure to start the lights or malfunctioning door locks. So, it's best to start the vehicle at least once a week to let it recharge. Common problems include converter failure or battery aging, so it's advisable to check the voltage regularly to avoid breakdowns on the road. When replacing the auxiliary battery, don’t opt for cheap off-brand options; stick to the original manufacturer’s specifications for safety and reliability.
