The Role Of Fuses in New Energy Vehicles

The fuse is a device that plays the role of melting and disconnecting. Its working principle is very simple: we know that when a short circuit occurs in the circuit, the instantaneous current will be very high, and the conductive wire will heat up at the same time. If there is no fuse in the circuit to protect it, it is very likely to burn out the electrical equipment.

 

 

In order to protect the electrical equipment from being burned out by accidental short circuit, people invented the charging pile fuse and connected it in series to the circuit. The key part is the special metal wire or conductive sheet with a low melting point and fuse cap contacts. When a short circuit, overload, etc. generate a large current, the conductive part of the fuse will heat up, reach the melting point, and disconnect, and lose the connection to cut off the current. Thus protecting the electrical equipment.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

In the high-voltage distribution box of electric vehicles, the output end is mainly connected to the auxiliary power system of the vehicle. In general, the distribution box includes the electric heating fan branch, the air conditioning compressor branch, the DC/DC branch and the charger branch. Each of these four branches needs to be installed with a line protection fuse. The purpose is to be able to cut off the power protection line in time when a short circuit occurs in each load to avoid vehicle fire. With the comprehensive advantages of small size, good earthquake resistance and low price, fuses have been widely recognized and used in large quantities, becoming the main components recognized at home and abroad for short-circuit protection of electric vehicles.

 

The lithium batteries, energy storage capacitors, motors, converters and electronic control circuits on new energy vehicles are all DC systems, and they all require DC type fuses and high-quality fuse holders for short-circuit protection to ensure safe and reliable normal operation and super short-circuit breaking effect. According to the fuses currently used in the electric vehicle industry, the maximum system voltage of most models is generally below 700VDC, and a few models are slightly higher than this voltage, so the fuses used for battery protection can be divided into 500VDC and 700VDC, and the current level is mostly 200A~630A.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Our company has high-end production equipment with very high-quality raw materials, and can produce high-quality fuse contacts for you. We also provide related technical consulting services. If you are interested in our products and services, please feel free to contact us.