EV Fuses - The Future of Electric Vehicles

 

Electric vehicles (EVs) and hybrids need fuses that provide circuit protection to expensive components like batteries and motors. The demand for EV fuses is projected to grow in the near future as the EV market continues to gain popularity.

 

EV Fuses are used to protect EV equipment such as battery packs, power conversion devices & electric motors, etc against electrical faults like overloads and short circuits. The fuses are manufactured to be robust to withstand vibration, g-forces, humidity, etc.

 

The EV fuse is similar to a standard fuse but designed to work at lower voltages than normal. They are often designed to be 500Vdc or 1000Vdc.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

According to a recent study, the global EV high-voltage fuses market is expected to expand at a CAGR of 20% - 25% during the forecast period 2021-2031. The increasing demand for EV fuses is a result of the increased electronic content in EVs and reduced costs of lithium-ion battery technology.

 

Companies offering EV fuses include Little Fuse, Eaton, and Bourns.

 

Little Fuse's NANO Series fuses are ideal for protecting EVs from extreme short-circuit current flow and ensuring reliability in tough situations. The fuses offer higher current handling ratings than traditional automotive fuses, providing faster starting for high currents and delivering the necessary safety to circuits and components.

 

Aside from the high current and voltage rating, EV fuses also offer safety features such as a sacrificial link that breaks during an overload or short circuit scenario to protect the rest of the electrical system. This type of fuse is designed to break only when the amplitude of the fault current is greater than the breaker's time profile.

 

This feature is called the inverse time profile. For example, an HRC fuse will carry a short circuit or fault current for a certain period of time before breaking. Even if the defect is removed during that time, the fuse component stays safe and does not melt or shatter.

 

The inverse time profile can also be used to protect sensitive components such as microprocessors that may be located inside the battery pack or power electronics. The fuses are available in different voltages to accommodate the range of charging stations and vehicle types.

One of the challenges facing EV fuse manufacturers is the need to design a fuse that can handle the high currents and temperatures associated with lithium-ion batteries. In addition, the need for higher volts and watts means that fuses need to be able to handle both high and low-current applications.

 

To address these issues, Bourns has launched its new POWrFuse high-power fuse model series for EV/HEV applications. These fuses meet ISO 8820-8 standards for the protection of high-voltage accessory circuits in EV/HEV applications such as electrical energy storage, battery disconnect units, and battery management systems.

 

EV fuses are typically implemented into the systems "early in the design cycle, to best protect all the equipment around the fuse". They are typically supplied by companies such as Eaton Bussmann and are designed to be installed with the application in mind.

 

ASWT (Xiamen Apollo Stamping Welding Technology CO., LTD) is an expert manufacturer of metal components for fuses, focusing on producing tailored accessories for fuse manufacturers. Their product range includes specialized components such as fuse end caps, fuse clip cap assemblies, and fuse holders.