The safety of the battery first depend on?

Source: 2020 - 03 - 28 also hits: the safety of the battery depends on the security of the data itself. Studies show that from the data, the thermal stability of the lithium iron phosphate is best. Shenzhen jiaotong university famous professor Ma Zifeng said the battery energy density is higher, the greater the possibility of overheating. Subverts the traditional security method battery safety issues are due to its response to the interface is very vivid, high responsiveness, affect the safety, battery data in response to activity and stability of the internal opposition. Xiang-yang wang, a professor at Pennsylvania state university, points out that the battery safety, relying on traditional ideas, the traditional method may be useless, still need to new ideas, need a new innovation. Xiang-yang wang spoke of a 'broken our traditional battery box of science and technology, can really subverts the traditional view ', namely using relative passivation data to construct a battery, in the side of the battery is written by a very thin blade sensitive to heat. So it is in time is usually a high security, high stability of structure, in the use of time, adjust the electrochemical dynamic characteristics of heat affected sensitively, so that it can output high power. In this way, you can get high security and high performance of the battery. '811 batteries, even 905 battery, only 5% 90% of the nickel, cobalt, the data itself is not very stable. We do the external coating, we use the lithium iron phosphate to cover these three elements, so the external very, very stable. From the active material to improve the battery can achieve a very stable. Xiang-yang wang. Travel the safety of the battery, ai think should work from three dimensions. The first layer is data layer, the second layer is single layer, the third layer is the layer system. In the data layer, progress to the key data and interface of thermal stability, lower the heat yield; At the individual level, in addition to optimize the battery thermal planning, more important is to choose some hot maintenance skills, such as PTC electrode, heat closed diaphragm, etc. At the system level, should open the adiabatic scheme, avoid thermal expansion. In general, the data is the root, monomer is the key, system is the ultimate guarantee of safety. Ma Zifeng believes that the safety of the battery and longer cycle life is a very important problem in the whole cell planning. In order to increase the safety of the battery, high energy density of batteries required temporary participate in specific maintenance equipment in system planning, such as the cooling system, explosion-proof system, etc. Test battery's health is very important, which requires the battery processing system. M chet said: 'if the battery was diagnosed with short circuit, it will inform the driver, I'm sorry, it may be in a few seconds on fire, as soon as possible to find a local parking spot. 'that maximize the safety of personnel. Sun believes that with the development of the battery energy density, on the one hand, it is necessary to improve the existing system, on the basis of safety, at the same time, it is necessary to explore new development more safety information system, higher energy density of batteries, such as solid-state batteries. Such as all solid-state batteries can really end, basic can deal with security problems.