As the interface between electric vehicle charging equipment and rechargeable battery, charging gun has mandatory standards, which all charging piles and electric vehicle manufacturers must abide by to ensure the consistency of pile-gun connection.
The charging gun is divided into 7 connectors (AC pile) and 9 connectors (DC pile), each connector represents a different power supply or control signal, and the specific national standard has regulations.
The core component of the portable car charging gun is the control box. Although seemingly inconspicuous, there are actually core technologies in the control box, and there are several invention patents involved. Therefore, when consumers buy car-mounted charging guns, they can't just look at the price of car-mounted charging guns. They are too cheap to buy.
New energy vehicle charging guns, all brands of vehicle charging guns are required to have overvoltage protection, lightning protection, output short-circuit protection, leakage protection and overcurrent protection, and there is a leakage protector inside, which will trip in time in case of leakage during standby or charging to protect the personal safety of customers.
Design principle of charging gun for electric vehicle
Household alternating current slow charging refers to converting the 5- 10kW power charger (actually alternating current to direct current, the output voltage may not be low) into direct current to charge the in-vehicle battery on the basis of the existing residential power supply system (using single-phase 220V or three-phase 380V).
There are five specific points to note:
1. Make full use of low power consumption as much as possible, which can reduce the impact on the power grid and reduce the user cost through peak-valley electricity price concessions: this can be solved by a timer;
2. The power should not be too large and the charging speed should not be fast. 5-8 hours is enough. Bearing capacity of lines in residential areas should be considered.
The charging gun not only connects the electric car and the charging pile, but also binds the safety of the user when charging. As an excellent charging gun enterprise, we should not only make charging guns with good charging performance, but also make absolutely safe charging guns.
Charging gun should not only be safe, waterproof and durable in material, but also have excellent insulation, flame retardant and high temperature resistance. Before it is put into production, it must be tested continuously, and the performance can be qualified before it can be put into use!