Electric vehicle charging instrumentality

Electric vehicle charging instrumentality

For an electrical vehicle, the battery charging device is one in all the indispensable subsystems. Its operate is to convert the electricity of the ability grid into the electricalal energy of the on-board battery of the electric vehicle. There are alternative ways to classify electric vehicle charging devices. Generally, it is divided into on-board charging devices and off-board charging devices.
On-board charging device refers to a tool put in on an electrical vehicle that uses the bottom AC grid and on-board power offer to charge the battery pack. as well as on-board chargers, on-board charging generator sets and in operation energy recovery charging devices. It directly plugs an AC line with a plug into the socket of an electric automobile to charge the electrical car. The vehicle-mounted charging device sometimes uses a contact charger with an easy structure and convenient control, and it may be an induction charger. it's designed fully in accordance with the sort of on-board battery and is highly targeted.

Non-vehicle charging devices, that is, ground charging devices, mainly include dedicated chargers, dedicated charging stations, general-purpose chargers, charging stations for public places, etc. It can meet various charging methods of various batteries. Generally, the power, volume and weight of non-car chargers are relatively large, so as to be able to adapt to various charging methods. In addition, according to the different ways of energy replacement when charging the electric vehicle battery, the charging device can be divided into a contact type and an inductive type. With the rapid development of power electronics technology and variable current control technology, and the maturity and popularization of high-precision controllable variable current technology, the staged constant current charging mode has been basically replaced by a constant voltage current limiting charging mode in which the charging current and charging voltage continuously change . Until now, the constant voltage and current limiting charging mode dominated the charging process. The biggest problem of contact charging lies in its safety and versatility. In order to make it meet the strict safety charging standards, many measures must be adopted on the circuit to enable the charging equipment to be safely charged in various environments. Both constant voltage and current limiting charging and staged constant current charging belong to contact charging technology.

In recent years, a new type of electric vehicle induction charging technology has developed rapidly. The induction charger uses the transformer principle of a high frequency AC magnetic field to induce electric energy from the original side of the vehicle to the secondary side of the vehicle to achieve the purpose of charging the battery. The biggest advantage of inductive charging is safety. This is because there is no direct point contact between the charger and the electric vehicle, so that even if the electric vehicle is charged in harsh weather, such as rain and snow, there is no danger of electric shock.

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