What are the consequences of jump-starting a car with a 48V battery?
2 Answers
Excessive current can damage electrical appliances. Here is relevant information: 1. Reason: The voltage of an electric bike battery is different from that of a car battery, so jump-starting cannot be used. Since the car battery voltage is 48V and the electric bike voltage is 12V, they cannot be directly used. It is recommended that when the car battery is dead, the owner can borrow another owner's battery for grounding to obtain power. 2. Grounding: Grounding is also known as negative grounding. Usually, the car's power comes from the battery, and the positive and negative poles are relatively independent. Grounding uses the car body as one pole of the power source, with positive grounding and negative grounding. Due to the superiority of negative grounding, modern cars all use negative grounding.
I deal with a lot of automotive electrical issues regularly, and the consequences of jump-starting a car with a 48V battery can be quite severe. The vehicle's systems are designed for a 12V standard, and the 48V voltage is significantly higher, leading to a surge in current. Firstly, computer modules like the ECU are most prone to damage, as their voltage tolerance is around 14V—exceeding this can cause permanent damage, affecting engine control. Fuses will undoubtedly blow, but worse, the wiring harness may short-circuit or even smoke, posing a high risk of fire. Components like headlights, audio systems, and starters can also be instantly ruined. I've seen cases where owners tried to save money by using the wrong battery, only to end up spending thousands on repairs and dealing with the hassle of towing. From a safety standpoint, it's strongly advised against attempting this. The proper method is always to use a 12V battery for jump-starting.
