What is the mechanism of lithium battery diaphragm as well as the role of the material?

In today's increasingly widespread application of lithium batteries, more and more users choose to use lithium batteries to achieve energy-saving results. In order to better utilize lithium-ion batteries, we need to understand the general knowledge of lithium-ion batteries. Today, the world can share the role of lithium battery diaphragm materials with lithium battery manufacturers, so that friends do not know how to learn.

First of all, lithium battery diaphragm materials provide safety precautions for rechargeable batteries.lithium ion battery VS lead acid battery The raw material of the diaphragm must have excellent dielectric strength to prevent the positive and negative electrodes from contacting or being pierced by burrs, particles, and twin crystals that cause short circuits. Therefore, the diaphragm must have a certain tensile and puncture compressive strength, not easy to tear, and basically maintain dimensional stability under sudden high temperature conditions, so as not to melt and shrink, which can lead to large-scale short-circuit and thermal runaway of the battery.

Secondly, the membrane material of lithium batteries provides microporous channels for lithium batteries to complete charging and a variety of characteristics.China wholesale spot welding machine factory Therefore, the membrane sheet must be a plastic film with high porosity and uniformly distributed micropores. The raw material properties and the porosity after breaking the emulsion limit the migration of lithium ions in the battery, which is reflected in the technical parameters of ionic conductivity.

The diaphragm is a key component of the lithium battery, which is located inside the battery between the positive and negative electrodes to ensure the passage of lithium ions and to prevent the transport of electrons. The characteristics of the diaphragm determine the interface structure and internal resistance of the battery, which directly affects the capacity, cycle performance and safety of the battery. Diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery.

With the rapid economic development of China's lithium battery, the diaphragm market and prospects are also very broad. Polyolefin microporous membrane because of its unique structure and characteristics, in the liquid lithium battery occupies an important leading social position. With the improvement of lithium battery performance design requirements, the preparation method of the diaphragm way to present a diversified trend, the preparation process is gradually formed to improve the modified processing technology enterprises to get the application of a wide range of impact on the research, while for the new type of lithium battery diaphragm has also made a certain degree of development.