Application of Fuses in New Energy Vehicles

In electric and hybrid vehicles, circuit protection is crucial. These vehicles operate at higher voltages, often exceeding 370 V, with some platforms reaching up to 576 V. Traditional fuses are not designed to handle such high voltages and the unique challenges of electric vehicles (EVs). Therefore, specialized fuses are necessary to ensure safety and reliability like Ceramic for Electric and Hybrid Vehicle Fuses.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Conventional Fuses

 

Standard fuses, such as those covered by UL 248 or IEC 60127/60269, are primarily designed for low-voltage applications. They do not address the specific needs of electric and hybrid vehicles (EVs), which include handling high DC voltages and ensuring long-term durability in automotive environments. Additionally, these fuses lack the necessary arc-extinguishing capabilities required for DC systems. To meet these demands, specialized components like Ceramic Tubes for High Voltage Fuses are employed. These ceramic tubes provide excellent electrical insulation and can withstand high temperatures, making them suitable for high-voltage applications in electric and hybrid vehicles.

 

Automotive Fuses

 

The automotive industry has developed specific standards to address these challenges. For instance, ISO 8820-11 specifies fuse-links with tabs (blade-type) Type M for use in road vehicles. These fuses are rated for 32 V and a current rating of ≤80 A. However, these specifications are insufficient for modern EV applications, which require higher voltage ratings and enhanced performance. To meet these demands, the integration of Alumina Ceramic for Bolted Connect EV Fuses offers improved thermal stability, electrical insulation, and mechanical strength, ensuring reliable circuit protection in high-voltage environments.

 

 

Designing fuses for EVs involves several critical parameters:

 

• Rated Voltage: The fuse's rated voltage must exceed the system's maximum voltage to prevent dielectric breakdown.

• Breaking Capacity: Fuses must be capable of interrupting fault currents without causing damage to the system.

• Arc-Extinguishing Capability: Due to the absence of zero-crossing in DC systems, fuses must effectively extinguish arcs to prevent sustained faults.

• Thermal Endurance: Fuses should withstand the thermal stresses encountered during normal operation and fault conditions.

• Mechanical Robustness: The fuse must endure vibrations and shocks typical in automotive environments without failure.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

As the automotive industry continues to advance towards electrification, the role of fuses in ensuring the safety and reliability of electric vehicles (EVs) becomes increasingly significant. Properly selected and designed high-voltage fuses not only protect the vehicle's electrical system but also contribute to the overall performance and longevity of the vehicle. Specialized components like Ceramic Tubes for EV DC Fuses and Ceramic Tube for EV British Standard Fuse are essential in meeting the unique demands of high-voltage applications. These fuses offer excellent electrical insulation, high thermal conductivity, and mechanical strength, making them suitable for high-voltage applications in electric and hybrid vehicles. Therefore, the selection of appropriate fuses should be considered a strategic decision, integral to the design and development of new energy vehicles.