What is the principle of a car emergency power supply?
2 Answers
The principle of a car emergency power supply is: 1. When the mains power is normal, the mains power supplies power to important loads through the transfer device, while performing mains power detection and battery charging management. The battery pack then provides DC energy to the inverter; 2. When the mains power supply is interrupted or the mains voltage exceeds the limit, the transfer device immediately switches to the inverter for power supply. With the support of the DC energy provided by the battery pack, the power used by the user's load is AC power converted by the EPS inverter. The main component of a car emergency power supply is a battery, whose basic function is to store electrical energy. In cases where the vehicle battery is frozen or malfunctioning, it can serve as a 12V starting system for cars, trucks, ships, etc., without requiring any AC power.
I always keep a car emergency power supply in my car, which is very useful when the car battery runs out of power. In principle, it's quite simple—it's a portable high-capacity battery pack containing rechargeable lithium cells, usually charged via USB or the cigarette lighter socket to store electricity. When you connect it to the car's positive and negative terminals, it can instantly deliver a high current to start the engine, functioning like a first-aid kit. The key is that it has internal control circuits for protection against overload and short circuits. Remember to recharge it promptly after use to maintain performance. It's best to choose a model with LED indicators for clear battery level visibility, ensuring worry-free and convenient usage.
