Factors affecting the safety performance of lithium ion power cells run through a power battery from the battery cord material to the end of the life cycle, so the reason is rich in complex and diverse levels. The battery core material itself, the manufacturing process of the battery, the design and use conditions of BMS (battery management system) and security in battery integration are the influencing factors of lithium-ion battery safety.In these links, the manufacturing error and abuse conditions are difficult to avoid, so in this realistic conditions, the design of the thermal out of control of the battery is especially important. This paper summarizes the combing of the factors affecting the safety performance of lithium ion power cells, in order to provide a reliable basis for its application and research in high energy / high power fields.
The lithium-ion battery replaces the dissolution and deposition of the metal lithium in the traditional lithium secondary battery in the lattice internal storage mechanism, eliminating the growth of the negative surface of the dendrite, and reduces the chance of shorting the battery.
But this does not fundamentally eliminate the safety hazard of the battery. As the liquid lithium ion battery is equipped with a negative table under overcharge, the deposition of metallic surface occurs, and the electrolyte is oxidative decomposition under high potential conditions, and a series of unsafe side effects occurs inside the battery.
In addition, the amount of people generated by the battery in the case of high current charge and cannot be lost in time, causing the temperature of the battery to rise rapidly. It also brings a significant security issue to the battery.
Although the stability of the electrode material, the composition of the electrolyte composition and the manufacturing process of the battery itself are both the main factors affecting the safety of lithium ion battery. However, the root cause of liquid lithium ion battery safety issues remains volatile and height of organic liquid electrolyte themselves.
Therefore, the study of the safety of liquid lithium ion battery is mainly concentrated in the reaction of electrode material and electrolyte and its thermal effects, and these studies have deepened a series of union of exothermic reactions and combustion mechanisms in the inside of lithium ion batteries. But to fundamentally eliminate the safety hazard of the battery.
The flammability of the organic solvent must be eliminated, the development safety is higher or the use of fundamentally non-combustible electrolyte systems, especially for large, high-power lithium-ion batteries, pre-charge, short circuit or other abuse of abuse production The problem has gradually prominent, and it must be a problem that must be overlink when the power-based lithium-ion battery is applied. Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery
