What are the characteristics of the power battery cover?

1, the power battery cover is characterized by:

(1) Explosion-proof

Power battery cover is a kind of power battery cover with high temperature resistance, high insulation, high sealing and good safety performance. The cover plate is specially equipped with explosion-proof device, which will automatically open and release pressure when the internal pressure of the battery cell is too high to prevent explosion.

(2) High internal resistance

The internal resistance of power battery cover plate is high, so it is generally necessary to fill nickel metal materials and weld copper connectors. The improvement of the copper cover material not only reduces the internal resistance of the battery, but also makes the lithium-ion battery cover achieve the effects of high temperature resistance, insulation and sealing by directly encapsulating the high-temperature insulating material between the battery cover and the conductive electrode, which has the characteristics of small volume, light weight, good sealing effect and good safety performance. But also can be directly welded with the copper connecting piece, thereby reducing the running cost of the nickel piece and the copper-nickel composite plate.

(3) Safety

The cover plate of the power battery uses the temperature of the battery core itself or the ambient temperature to start the short circuit of the mechanical device, which is safe, reliable, simple and feasible, and can improve the safety of the battery hot box and the safety of the battery overcharge at the same time. 、

(4) sealing

According to the actual use requirements of power battery, the cover plate of power battery has been designed innovatively in sealing performance, explosion-proof safety performance and temperature performance. The seal is made of sealing material with superior temperature performance, and the product has good high and low temperature sealing performance.

2. Power battery is a power supply that provides power for tools, mostly referring to batteries that provide power for electric cars, electric trains, electric bicycles and golf carts. It is mainly different from the starting battery used for starting automobile engines. Lead-acid batteries with sealed valve ports, open-tube lead-acid batteries and lithium ferrous phosphate batteries are mostly used.

3. The reactant of the negative electrode is molten sodium in the negative electrode cavity and the reactant of the positive electrode is molten sulfur in the positive electrode cavity. The anode and cathode are sealed by α-Al2O3 electrical insulator. There is β-NAAL11O17 ceramic tube electrolyte between the positive cavity and the negative cavity. Electrolyte can only conduct ions freely, but it is an insulator of electrons. When the external circuit is connected, the negative electrode continuously generates sodium ions and releases electrons, and the electrons move to the positive electrode through the external circuit, and the sodium ions react with the positive reactant through the β-Naal11o17 electrolyte to generate sodium sulfide.

4. The test and evaluation of power battery is very important in the development of pure electric vehicle industry, especially how to test and evaluate the performance of power battery pack.