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Showing posts from April, 2024

The difference between constant current charging and constant voltage current limiting charging

 The difference between constant current charging and constant voltage current limiting charging 1. The principle of constant voltage and current limiting charging and the current calculation method Constant voltage and current limited charging is a way of charging by regulating the voltage and limiting the charging current. When the battery voltage is insufficient, the charger charges with constant current to achieve a fast charging effect; when the battery voltage reaches the set value, the charger automatically adjusts to constant voltage to keep the battery voltage from exceeding the set value. At this time, the charger will limit the charging current to avoid overcharging. Therefore, constant voltage and current-limiting chargers need a calculation formula to calculate the relationship between the charger input voltage and the required output current. Calculated as follows: Charging current I = rated output current of the charger * rated capacity of the battery / remaining capacit

The Differences between electric vehicle and fuel vehicle

  The Difference s  between electric vehicle and fuel vehicle Fuel vehicles are mainly composed of engine, chassis, body and electrical components. Compared with fuel vehicles, the structure of electric vehicles is that batteries replace gasoline, and motors replace engines. In addition, unlike traditional fuel vehicles, the braking of electric vehicles can recover braking energy, which is often referred to as braking feedback, while traditional vehicles cannot. Compared with fuel vehicles, the structure of pure electric vehicles is more flexible. The energy of fuel vehicles is mainly transmitted through rigid couplings and transmission shafts, while the energy of electric vehicles is mainly transmitted through flexible cables and wires. The differences between electric vehicles and fuel vehicles are as follows: 1.  The power system is different: electric vehicles use batteries as energy sources, which  are driven by electric motors and equipped with speed regulators for speed control;

5 kinds Electric vehicle charging methods

 Electric vehicle charging methods The charging methods for electric vehicles mainly include conventional AC charging, fast DC charging, wireless charging, mobile charging, and battery replacement charging. 1. Conventional AC charging method This charging method uses the traditional charging method of constant voltage and constant current to charge electric vehicles, that is, it uses the portable EV charger equipped with the vehicle for charging, and can use household power supply or dedicated charging station power supply. It’s what we use in passenger cars now,on-board chargers and home wall-mounted EV chargers. The charging current is as small as 16-32A, and the current can be direct current or two-phase alternating current or three-phase alternating current. Therefore, the charging time is 5 to 8 hours depending on the capacity of the battery pack. The shortcomings of the AC charging mode are very obvious. The charging time is long, but its charging requirements are not high, and t

How does the AC EV chargers work?

How does the AC EV chargers work? AC charging means that on-board charger(OBC) converts the alternating current into direct current to charge the power battery to complete basic AC charging. The components of AC charging mainly include power supply equipment, such as Portable EV charger or AC charging station, OBC, slow charging EV connetors, high-voltage control box, power battery, VCU, BMS, high-voltage wires, low-voltage wires, etc. 1. On-board charger: converts alternating current into direct current according to control instructions to charge the battery. 2.AC charging connectors: divided into type1, type2, GBT EV connectors 3.VCU: Monitors the status of the vehicle and issues control instructions to the on-board charger to make it work or stop working, control its operating current and voltage, etc. It is the control brain of vehicle charging. Mode 2 charging : It is a charging cable with control box that connects the external power grid and the vehicle, and directly provides AC

How to ensure the safety of portable EV charger?

 How to ensure the safety of portable EV charger? 1. Safety issues are a key consideration in the design process of the EV charging charger. The charger should have protection devices such as over- and under-voltage protection, lightning protection, output short-circuit protection, leakage protection and over-current protection, and a leakage protector inside. If there is a leakage during standby or charging, it will trip in time to protect the user's personal safety. The appearance design of the EV charger should have necessary operating specifications and warning signs to remind users of safe operation. 2. The design of the charger not only requires the core technical support in the control box, but also requires reliable material support. The materials must be flame retardant, environmentally friendly, wear-resistant, weather-resistant, impact-resistant, highly oil-resistant, UV-resistant, high and low-temperature resistant, etc. The shell material of the portable EV charger nee