How to assemble lithium batteries for electric vehicles

Lithium battery of electric vehicle is a battery that provides power for lithium battery electric vehicle. The environmental problems brought by traditional internal combustion engine vehicles and the shortage of oil resources make people turn their attention to new energy vehicles. Lithium-ion battery has become an ideal power supply for a new generation of electric vehicles because of its excellent performance. So, how to assemble lithium batteries for electric vehicles? What are the precautions for using lithium batteries in electric vehicles? Next, let's take a look at Bian Xiao. First, how to assemble lithium batteries for electric vehicles

1, preparation materials, including stainless steel battery box and 60V24AH lithium battery assembled for electric vehicles, and the lithium battery must be the power battery of electric vehicles.

2, a string of 20 lithium batteries, a total of 8 strings.

Series 3 and 8 lithium batteries are connected in parallel, insulated by separators and tapes.

4, tape fixation, series welding protection line.

5. Wrap the lithium batteries welded in series with heat shrinkable film for insulation, connect the protective plate, and do a good job of insulation to prevent short circuit.

6. Short circuit of lithium battery is very harmful. After the lithium battery is wrapped by the heat-shrinkable film, the assembly of the lithium battery of the electric vehicle is completed. Just put it in the electric car.

Two. Matters needing attention in using lithium battery in electric vehicle

1, temperature

Temperature also has a great influence on the life of lithium batteries. The environment below freezing point may cause the lithium battery to burn out at the moment when the electric vehicle is turned on, while the overheated environment will reduce the battery capacity of the electric vehicle. Remember not to expose the electric car to the sun.

2. High intensity current

For example, the battery of 18650 is discharged at 3C, and your electric car is 8000W W. If the battery used is lower than the discharge current of your electric car, the temperature of the lithium battery will be too high, the life will be shortened due to excessive current, and the battery will be bulging and scrapped. If your electric car has great power and high speed, it is recommended to choose 10C current 18650 battery, so as to choose a suitable battery.

3. Fully charged storage

The ternary lithium battery is fully charged at 4.35V V. At present, the protective plates on the market are all 4.2V, so many people say that there is no nominal capacity when buying lithium batteries for electric vehicles. In fact, this is the reason. Generally, it is best to store lithium batteries for electric vehicles for a long time and fill them with 50% batteries. For example, many of your new mobile phones are turned on at 50%.

If it is fully charged for a long time, the capacity of the lithium battery will decrease. Besides lithium ferrous phosphate and lithium titanate can be stored in full charge, it is also necessary to pay attention to the selection of protective plates with better quality. The biggest taboo of lithium battery is over-discharge, lithium ternary battery will be scrapped once put, and it will be scrapped if overcharged.

3. Is the lead-acid battery of electric vehicle better or lithium battery?

As an electric vehicle battery, lead-acid battery has its advantages in design. The advantage is that it provides a relatively large open-circuit power supply (compared with lithium batteries). A 12V battery only needs to be made into one battery, and lithium batteries may need to be connected in series to form a battery pack when used as power batteries. For the design of power battery, lead-acid battery is easy to do, while lithium battery needs to encounter many problems in design, late charging, use and maintenance. In terms of manufacturing cost, the current power batteries, lead-acid batteries are lower and lithium batteries are higher, but lithium batteries are the future development trend.