Can a car be started directly while charging?
2 Answers
It is possible to start a car directly while charging, but it may be difficult to start the car during the initial charging phase (when the battery is not fully charged). This is because the charger's voltage does not exceed 15V while charging the battery. When starting the engine, the high current required mainly comes from the battery itself. If the battery is not sufficiently charged, it cannot provide enough starting current, making it difficult to start the car. The maintenance methods for car batteries include: 1. Starting the car periodically to charge the battery; 2. Adding distilled water or a dedicated replenishing fluid when the electrolyte level is low; 3. Regularly checking the small holes on the battery cover to ensure they are ventilated; 4. Inspecting the positive and negative terminals for signs of oxidation; 5. Checking all parts of the circuit for aging or short circuits; 6. Turning off all electrical devices when leaving the car.
With years of experience in car repairs, I've seen it all—never attempt to start the engine directly while charging, as it poses significant risks. When the charger is connected to the battery, a steady current is flowing in. Starting the engine suddenly demands a massive surge of current from the starter, creating a conflict between the two currents that can easily lead to short circuits, sparks, or even minor explosions. I've handled cases like this for customers—blown fuses and chargers, costing hundreds in repairs. In severe cases, it can even damage the Electronic Control Unit (ECU), making repairs even more expensive. The safe practice is to first turn off the charger, unplug the connection, and then start the engine. Additionally, regularly checking for battery aging and terminal corrosion is crucial. Developing good habits can save you both hassle and money.
