EV fuse differs from traditional automobile fuse mainly in application scenarios, performance requirement, type and function, as follows:

I. Application Scenarios
Traditional vehicles: Fuses are mainly used for low voltage circuit protection such as lighting and audio systems. Their voltage levels are usually low, requiring relatively low breakability and response speed.
Electric vehicle: Fuses are used for high voltage DC protection, such as battery management systems, motor controllers, charging system, etc. These systems have high voltage levels, high current and high performance requirements for fuses.

II. Performance Requirements
Broken capacity:
Traditional vehicles: Fuses have relatively low breakage capacity and can handle general overload and short circuits.
Electric cars: Fuses need to be highly disconnected to handle short-circuit circuit currents of thousands or even tens of thousands of amperes, ensuring quick circuit disconnection in extreme situations to protect equipment and people.
Response speed:
Traditional Automobiless: Fuses response speeds relatively slowly, enough for general protection needs.
Electric cars: Fuses must have rapid response capabilities to cut faulty circuits in milliseconds and prevent potential equipment damage or fires caused by sustained current.
Reliability:
Traditional Automobiless: Fuses have relatively low reliability requirements and are sufficient for general use.
Electric cars: Fuses must be reliable, able to operate in long-term vibration, high temperature and other harsh environments to ensure the safety of electrical systems.

Electric Vehicle Fuse Link

III. Type and Function
Traditional Automobiles: Primarily use traditional types of fuses such as chip fuses.
The function is relatively simple, mainly used for overcurrent protection.
Electric cars:
DC Fuses: Designed for the protection of DC circuit, adopts arc free design to improve safety.
Excited Fuses: In special circumstances such as vehicle collisions or water immersion, control unit signals can be received, providing active protection against internal explosion at millisecond level. Their drawback, however, is that they cannot transmit signals when the control unit malfunctions.
Intelligent Fuse: This fuse combines current detection circuits and hardware circuitry to realize self-detection and self-excitation. They also possess fault diagnosis and information exchange capabilities that make protection smarter and more reliable.
Main circuit and auxiliary circuit fuses: different types of fuses are selected according to the application scenario, and each type of fuse meets different circuit protection needs. For example, main circuit fuses protect key components such as batteries and motors, while auxiliary circuit fuses protect auxiliary equipment such as air conditioner compressors and DC/DC converters.