Why does the larger the current of the EV charger, the thicker the wires?

2023/7/26 9:10:41

Why does the larger the current of the EV charger, the thicker the wires?


The relationship between wires and current

Power refers to the ability of electrons to flow through wires, and current is the measure of this power indicator on wires. The magnitude of the current depends on the following factors:

1. Voltage: The higher the voltage, the greater the current.

2. Resistance: Resistance is inversely proportional to current, and the smaller the resistance, the greater the current.

3. Conductivity: The conductivity of a material directly affects the magnitude of the current, and the stronger the conductivity, the greater the current.

Therefore, the magnitude of the current can be regulated by controlling the above factors.


The relationship between wires and resistance

Resistance is the electrical power generated by a wire when flowing current, so the size of the wire is greatly related to the resistance. Generally speaking, the thicker the wire, the smaller the resistance generated when current passes through it, and the less energy accumulated inside the wire. When the ev charger wire is too thin, the resistance will increase, and the accumulation of heat will also increase, which can cause burning damage to the wire and even trigger a fire.


Factors that determine the thickness of wires

The thickness of a wire is closely related to the amount of current it can withstand, and there are several factors that determine the thickness of the wire:

1. Current size: The larger the current, the thicker the wire, in order to ensure that it can withstand the current load.

2. Line length: The longer the line length, the longer the time for the current to pass through, and usually thicker wires need to be selected.

3. Environmental temperature: The thickness of the wire is also related to the environmental temperature, and whether it is too high or too low will affect the amount of current the wire can withstand.

In short,EV charger wire thickness is a comprehensive consideration based on various factors such as current size and line length to ensure that the wire can carry the required current and avoid overload or overheating issues.