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

How to improve the safety index of new energy vehicle power lithium battery pack? There are many types of power lithium-ion batteries for new energy vehicles. Common ones include aluminum-air batteries, lead-acid batteries, ternary lithium batteries, lithium iron phosphate batteries, nickel-metal hydride batteries, etc. Among them, lithium batteries are currently relatively mature in technology and performance. Relatively stable and most widely used. Under the same volume and weight, the ternary lithium battery pack has a larger capacity, a higher energy density, and a longer relative lifespan than a lithium iron phosphate battery. The safety of power lithium battery packs can be improved, and the most fundamental thing is to rely on the advancement of material technology. The thermal stability and safety of lithium batteries with high temperature resistant ceramic coating isolation membrane have been further improved, but the thermal stability of the cathode material has not been improved. It can be improved very well, and the electrolyte has always been in a flammable and explosive organic system. The most fundamental solution to the thermal runaway of power lithium battery packs is to develop a non-flammable or non-flammable electrolyte, so that even if various short circuits or thermal runaway conditions occur, the battery just generates heat and will not burn and explode violently. The power lithium battery pack is the heart of electric vehicles and the key to the development of the new energy automobile industry. Battery energy density and safety have become important indicators that determine product performance, and the development of the industry is very important. As the culprit of the new energy vehicle accident, the power lithium battery pack concentrates dozens of degrees or even Baidu's electricity in a small container. In this case, the safety of the battery requires not only high-quality positive electrode materials, negative electrode materials, and separators. Battery raw materials such as, electrolyte, etc., as well as the packaging of batteries and batteries, also require higher technology. How to improve the safety index of power lithium battery packs and anti-collision: Battery applications require higher and higher anti-collision performance. Ordinary battery assembly methods can no longer meet its requirements, and most batteries and casings basically have no fixed measures. If the impact is severe, the tabs will break, and the short circuit of the electrodes will cause fire and other dangers. Anti-flame retardant: The fire of a battery is often caused by the fire of a single battery cell and the fire of the surrounding battery cell, which will eventually cause the fire or explosion of the entire battery. In addition to strict control of battery materials, the external protection of the battery is also very important. Waterproof: A small amount of water in the battery will cause the electrolyte LiF6 to react and HF will appear. HF will dissolve the positive electrode active material, which will cause the battery capacity to be lost, and water will increase. A large amount of HF gas will appear to cause the battery to expand or even burst. The moisture in the environment will slowly penetrate into the battery core, causing safety accidents. Heat conduction: The electrochemical reaction at the electrode/electrolyte interface is related to the ambient temperature. Temperature has a greater impact on the charge and discharge performance of lithium batteries. When the battery temperature exceeds 95°C, the battery life will be greatly shortened. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What should lead-acid batteries do when they are not used for a long time?