What is the difference between fast charging and slow charging of lithium batteries in cars on the r

Introduction What is the difference between fast charging and slow charging of lithium batteries in cars on the road? When new energy vehicles use charging piles for energy supply, charging power and charging time, as well as charging pile input?

What is the difference between fast charging and slow charging of lithium batteries in cars on the r

When new energy vehicles use charging batteries for energy supply, they can be divided into two charging methods: DC fast charging and AC slow charging according to the charging power and charging time, as well as the type of output current. of the charging pile. So, what are the differences between these two charging methods?

What is the difference between fast charging and slow charging?

Fast charging refers to high-power DC charging. It uses the charging interface of the DC charging pile to convert the alternating current of the power grid into direct current and transports it to the fast charging port of the electric vehicle. Electrical energy goes directly into the battery for charging. It can be charged to 80% in just half an hour.

Slow charging refers to mains charging. This is a pil charging interfacee AC load. It feeds AC power from the power grid into the trickle charging port of the electric vehicle, converts the AC power into DC power through the charger inside the car, and then feeds it into the battery to complete charging. An average car model takes 6-8 hours to fully charge the battery.

The respective advantages and disadvantages of fast charging and slow charging

Advantages of fast charging:

The occupation time is short and the DC charging voltage is generally higher than the battery voltage, the AC power needs to be converted to DC power through a rectifier, which imposes higher requirements on the voltage resistance and safety of the battery. food.

Disadvantages of fast charging:

Fast charging will use greater current and power, which will have a significant impact on the battery. A load too lowpide will result in empty power consumption. Fast charging mode is much more important than slow charging mode. The high temperature generated will directly cause accelerated aging inside the battery, significantly shortening the battery life. In severe cases, this will cause frequent battery failures.

Benefits of slow charging:

Charge the device battery at a lower speed with almost no empty energy. In addition, the charging current of slow charging is generally less than 10 amps, and the maximum power is 2.2 kilowatts, which is several times lower than the 16 kilowatts of fast charging. This can not only reduce battery heat and pressure, but also help extend charging. battery life.

Disadvantages of slow charging:

Charging time is long and it often takes several hours tofully charge a depleted battery.

The two methods of charging new energy vehicles have their own advantages and disadvantages. For purely electric vehicles, battery maintenance costs are relatively high. Therefore, it is recommended that when using the charging mode, you try to use slow charging as the main method and fast charging as a supplement, in order to maximize battery life.

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