company news about Why use DC high-speed fuse for the protection of electric vehicles?

        Electric vehicle is a high-end industrial product integrating modern high-tech, high electronics, high material technology and manufacturing technology. On-board lithium battery, energy storage capacitor, motor, converter and electric control circuit are all DC systems, which require DC type fuse for short circuit protection to ensure safe and reliable normal operation and ultra-strong short circuit breaking effect.

        The fuse is responsible for the dual functions of power connection and safety protection in the system, which is related to the overall safety of the vehicle and the human body. Therefore, the fuse for the protection of the electric vehicle must be a DC type millisecond precise product that can be disconnected at high speed. When there is a huge short circuit current in the circuit, the current through the fuse increases rapidly in a very short time, resulting in the fuse directly burning from the solid state and vaporizing in a very short time, The strong grid arc ion gas is generated to limit the smooth passage of the short circuit current. Under the tight surrounding and forced cooling of the surrounding quartz sand, the high temperature and high voltage arc bridge is quickly extinguished and disconnected, and the channel of the short circuit current is cut off to achieve the effect of safe and high-speed disconnection. The whole process only takes a few milliseconds.

        Due to its simple operation principle, low manufacturing cost, strong safety and reliability of limiting the breaking fault current, the fuse is the most effective electrical component for overcurrent protection, especially for short circuit protection. With the comprehensive advantages of small size, good shock resistance and low price, the fuse has been widely recognized and widely used, and has become the main component for short circuit protection of electric vehicles recognized at home and abroad.