Speaking of car emergency power supply, its main job is to start the ignition power supply device to the car in a short time when the car battery is dead or dead and it cannot be started. In recent years, due to frequent battery shortages in most automobiles, it is precisely because of this that the domestic automobile emergency start power supply industry is booming. Below I will take you to understand the working principle of the power supply. The working principle system of automobile emergency start power is mainly the inverter function, which is also the core function of the product. It includes discharge, charge, etc.

 Convenient to carry and easy to operate is the original intention of car emergency design, using PVC material and ABS material shell, high magnification model aircraft polymer battery. Digital LED power display. Car emergency start The power supply can be charged by car charger and home charger. The product is equipped with automatic reverse charging and overcharging functions. It plays a protective role in starting the power circuit. Constant light, flashing light and SOS emergency light can be turned on by pressing the white button lightly.                         

 Basic working principle of emergency start power supply for multi-function vehicles:

 1. When the AC power is input, it is used to start the car through self-return and self-return (inter-return device). At the same time, the system controller charges and manages the AC power through the charger. Generally, the capacity of car chargers or home chargers for automobile emergency start power is generally 1/10 of the capacity of the product itself, which only provides supplementary functions to the product, and does not have the ability to provide inverter current. Under the system control of the controller, the inverter will stop working. The input AC power will supply power to the car or other charged electronic products through the mutual investment device (self-return and self-recovery). 

 2. When the AC power is interrupted or overvoltage, the controller system issues a command to the mutual input device, which is switched to the inverter to supply power, and will use the power stored in the battery to supply power to other products.

 3. When the input AC voltage is normal, the controller system will issue a command, and the inverter will switch to the shutdown state. At this time, the mutual investment device is switched on to start the conversion from the inverter to the AC bypass power supply. Provide AC power for charging other products. It will also charge the battery pack.

 4. The car battery is generally 9V~16V. When the car starts, the engine starts to work. At this time, the car battery is about 14V. When the engine is turned off, the car's battery is about 12V.