company news about Dissmann Fuses are applied to EV / HEV

        At present, EV/HEV is composed of relatively expensive components (such as batteries, power electronic components, contactors, etc.). In order to protect these components from surges and failures, an important aspect of the power transmission system is to reasonably select fuses. With the continuous development of EV/HEV electrification scheme, more challenging requirements are put forward for fuses.

        For protective fuses used in traditional industries, manufacturers generally design and test according to the published standards IEC60629, UL248 (USA) and VDE0636/0635 (Germany). When introducing high-voltage fuses into EV/HEV, there are mainly JASO D622 (Japan) and ISO 8820-7/8 (both are applicable to 450VDC, and similar references are made in GB/T31465) and OEM manufacturing standards.

        Since the industrialization of new energy vehicles is the first and standardization is the last, the high-voltage fuse used earlier in EV/HEV has basically evolved from the fuse in traditional industries. Comparatively speaking, there are some differences between automobile grade high-voltage fuses and traditional industry applications, mainly as follows:

◆ Application environment: fuses in traditional industries are mainly based on AC working conditions, and EV/HEV is DC voltage;

◆ Cyclic load: EV/HEV current load is difficult to define, depending on vehicle start stop, driving behavior, etc;

◆ Ambient temperature: the ambient temperature curve of automobile fuse is more complex (high temperature/low temperature);

◆ Shock and vibration: higher shock and mechanical vibration;

◆ Space and weight: The installation options of automobile fuse are more demanding.