The fuse is commonly known as the fuse tube. In ordinary circuits, a fuse tube is separately configured for the load to avoid load damage and circuit fire caused by short circuit.
Automotive high-voltage fuses are electrical appliances used for overcurrent protection of power batteries.
In order to adapt to the dedicated DC power generation for electric vehicles, three conditions need to be met. First, it has the characteristics of DC fast protection, which can complete the fast fuse of overload and short-circuit current. Second, it has the structural characteristics of small size, durability, shock resistance, and general interchangeability. 3. Automobile high-voltage fuses should have fire safety measures that are resistant to high temperature, non-self-igniting and non-combustion-supporting.
Why do electric vehicles use high-voltage fuses to protect the battery from overcurrent?
This is based on the clear regulations of the standard GB/T18384.1, which is also because when the battery system has a serious failure, a safe and reliable gate is required to effectively prevent the spread and expansion of high-voltage current accidents. Due to the small space in the car, large-scale DC circuit breakers cannot be installed, and only small and compact high-voltage fuses can be selected.
As a protector to limit abnormal accidents, this is the safety standard configuration of electric vehicles at home and abroad. In the process of electric vehicle power distribution design, it is necessary to clarify the specific load, such as PTC resistive load, DCDC, MCU, DCAC, AC capacitive load of air conditioner, fast charging characteristics, etc., it needs to be checked and used according to different loads, in order to design A fuse that can safely protect the load circuit.
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