Functions of Portable Electric Vehicle Charger for New Energy Vehicles

Understanding of Portable Electric Vehicle Charger

The role of portable EV car charger is to facilitate charging of new energy vehicles. One advantage is that it is very easy to carry and can be placed in the car trunk at any time. When convenient, it can be taken out to charge the car.

Safety issues are of utmost importance when using a portable electric charger. During the charging process, when a strong current is conducted through thousands of components, any one small component that cannot withstand the current may pose a safety risk. In addition, waterproofing is also important. If not done properly, it may cause static electricity or even leakage.

Advantages of Portable Electric Vehicle Charger

The portable car charger for electric car can be carried with the car. There is no need to apply for a separate electric meter. As long as there is a three-pin socket with electricity, energy can be replenished. The low-power alternating current charging of the portable EV car charger is friendly to the battery. The price of the portable charger for electric cars is generally lower than that of the fixed charger with the same power.

Process of using Portable Electric Vehicle Charger

• After slow charging is "plugged in", the AC power supply equipment detects whether the gun head is connected well through the CC/CP loop voltage detection device, and after confirming that there is no problem, the high-voltage contactor is closed to supply power to the OBC input.

• After the OBC is powered on and self-checks without faults, it outputs low-voltage auxiliary power, and the BMS and VCU are activated.

• When the VCU detects the "charging activation signal" and the BMS sends out the "AC charging connection", it pulls in the "slow charging high-voltage relay" and controls the slow charging electronic lock to execute the "locking logic".

• The BMS detects whether the car end gun head is connected well through the CC loop voltage, and obtains the "rated capacity of the cable"; confirms the maximum power supply current of the AC power supply equipment through the detection of the PWM signal of the CP loop; the BMS takes the minimum value of the former two and the "rated input current value" sent by the OBC, and sets it as the "maximum allowable input current value" of the OBC, and sends the charging voltage and current information to the OBC.

• The BMS pulls in the charging relay and sends the "charging machine control command" through the CAN message. After receiving it, the OBC starts charging.

• When the BMS detects that the battery has reached the "full charge state" or receives the "charging machine terminates charging message" sent by the OBC, it disconnects the charging relay; the VCU detects that the BMS has disconnected the charging relay, and disconnects the "slow charging high-voltage relay" and controls the slow charging electronic lock to execute the "unlock logic".