How to improve the safety index of the power lithium-ion battery pack?

　　Author ：Iflowpower – Portable Power Station Supplier

How does new energy vehicle power lithium-ion battery pack improve safety index? There are many types of dynamic lithium-ion batteries of new energy vehicles, commonly including aluminum air batteries, lead-acid batteries, three-dimensional lithium ion batteries, lithium iron phosphate ion batteries, nickel-hydrogen batteries, and the like, wherein the lithium ion battery is at present. Mature, more stable, most extensive. Under the same volume, the tetra-lithium ion battery pack compared to the lithium iron ion battery, the amount of energy is high, and the relative life is longer.

Dynamic lithium-ion battery pack safety realizes quality, and is mostly based on the advancement of material technology, using high temperature-resistant ceramic coating membrane lithium ion batteries, the thermal stability and safety of the positive electrode material are further improved, but the thermal stability of the positive electrode material It has not been able to improve very well, and the electrolyte has always used the flammable and explosive organic system. The most fundamental solution for power lithium-ion battery packs is to develop refractory or non-combustible electrolytes, so that even if there are various short circuits or thermal out-of control situations, the battery is only fever without violent burning explosions. The power lithium-ion battery pack is the heart of the electric vehicle.

It is the key to the development of the new energy vehicle industry. Battery energy density and safety have become an important indicator of the performance of the product. As a culprit, the powerful lithium-ion battery pack will be in a small container in a small container, and in this case it guarantees that the battery safety is not only high quality positive material, the negative material, Battery raw materials such as diaphragm, electrolyte, while the packaging of batteries and cells is also high.

How to improve the safety index against the dynamic lithium-ion battery pack: Battery application has become higher and higher in anti-impact performance, and ordinary battery packages can no longer meet their requirements, and most of the cells and housings do not have fixed measures. When the battery is severely impacted, the extreme ear break occurs, and the electrode short circuit causes a dangerous danger. Anti-resistance: The fire of the battery is often a single battery that causes the surrounding battery to get fire, and finally causes the fire or explosion of the entire battery.

In addition to the strict control of the battery material, the external protection of the battery is also important. Waterproof: Introducing trace water in the battery, causing electrolyte LIF6 reactions, HF, HF can dissolve the positive electrode active substance, so that the battery capacity is lost, the water is added, and a large number of HF gases will cause the battery to expand and even fry the battery, and the battery is in use. The water in the environment slowly penetrates inside the battery, causing safety accidents.

Conductive: The electrochemical reaction on the electrode / electrolyte interface is related to the ambient temperature, and the temperature is much more affected by the charge and discharge performance of the lithium ion battery. When the battery temperature exceeds 95 ¡ã C, the battery life will greatly shortened.