The technical bottleneck and safety guarantee of lithium battery system

Technical bottlenecks and safety assurance analysis of lithium battery systems As an electronic component of real-time monitoring, active balancing and intelligent charging and discharging, battery processing systems (BMS) play an important role in ensuring safety, prolonging service life and saving electricity. After a series of manipulation and control, the normal operation of the electric vehicle is guaranteed. According to relevant data, the global market value of battery production systems rose by more than 10% in 2013, and the growth rate will jump to 25-35% from 2014 to 2016. By 2020, the compound annual growth rate of electric vehicles will remain around 15% to 30%. In addition to the increase in the number of pure electric vehicles, plug-in hybrid vehicles and hybrid vehicles, the new 48V light hybrid power system will also be significantly added. In view of this, electronics enthusiasts talked with Littelfuse’s my country Sales Director Zha Yong. Zha Yong, the company's sales director in my country, said that in order to make the battery work under a stable and safe condition, it is necessary to deal with the battery charging and discharging conditions and monitor the battery's safe working voltage. The market forces our company's sales director Yong to say that it is based on the requirements of low or zero emissions and improved air quality, which puts forward higher power requirements for cars, and then the increase of the entire car CLP load (such as increased car power, Multimedia, etc.), high-voltage power supply and power supply system are more powerful. There are currently four important types of electric vehicle/hybrid vehicle architectures: Hybrid Electric Vehicle (HEV), an oil/electric hybrid vehicle in which the battery is charged by the engine; secondly, PEV (plug-in) is a mixture of oil and electricity , The battery needs to be charged externally. Third, pure electric vehicles driven by pure batteries; fourth, power supplied by chemical fuel-powered batteries. Zha Yong said that gasoline and electric hybrid vehicles accounted for a relatively large proportion of the mall at the time, and they will gradually transform to pure electric vehicles in the later period. So what are the advantages of lithium batteries? We know that the power supply system of electric vehicles is composed of several lithium batteries. Lithium battery system technical bottleneck and safety assurance analysis can be seen from the above figure, the lithium battery pack is composed of one battery cell, each battery cell has about 500~7000 battery cells, which puts forward a higher level of battery processing and control Claim. Lithium battery technology will be the foundation of any type of electric vehicle. Cha said that the best cost and features will be supplied in the future. It is expected that the cost will drop by a quarter to a third in the next few years, and the energy density will increase by the same amount. As can be seen from the comparison table of lead-acid batteries, nickel-metal hydride batteries and lithium batteries in the above figure, the advantages of lithium batteries in terms of power density and charging cycle life are irreplaceable. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Teach you the skills to reduce UPS power battery failure rate