The ternary lithium electricity and the mainstream of the lithium iron phosphate lithium battery struggle!

Three core parts, respectively is the battery, motor and electric control, and the battery is a hotspot in the hot. The reason is that battery technology revolution, the foundation is to promote electric vehicles achieve a qualitative leap. How can the development of high energy density, high security, high reliability of the 'three highs' power battery, is the biggest challenge facing the next few years the battery industry. What is a lithium battery and battery management system is well known, the most widely used at present market power battery is lithium ion battery. So-called lithium ion battery is lithium ion in moving between cathode and realizes the charging and discharging. Monomer lithium ion battery, For example you charging treasure is in general a few blocks) , mainly composed of the anode materials, anode materials, membrane, electrolyte and other major parts. On the basis of the different electrolyte, lithium ion battery is divided into liquid state organic electrolyte of lithium battery and lithium polymer batteries, while the former, is what we commonly known as' lithium batteries. Everyone firewood high flame, three-ply twine wring difficult. Want to drive car, it is not enough to monomer battery. Monomer battery ( 细胞) The battery module ( module） Eventually form a battery pack, battery module ( 包) To provide enough power for electric vehicles. After a large number of monomer battery together, consider of battery pack cooling synergy to charge and discharge and so on. Battery management system ( BMS) , it is to manage all the application of monomer battery, a good BMS, concerns the stability and security of battery pack, also determines the performance of battery pack can get maximum play. Battery management system, the measurement and control the whole battery pack, to manage the whole battery parameters systematically, make the whole battery pack can safe, stable and efficient work. In general, the BMS monitor monomer, battery module, and the voltage of battery pack, current and battery surface temperature. According to the measured results, BMS estimate the soc of batteries, and speculated that pure electric range of electric vehicles; At the same time, the BMS also can measure surface temperature of the battery, cooling system to decide whether to open the battery pack. BMS through CAN bus and electric vehicle control unit of information interaction, the driver also reading to the power battery from the instrument panel shows part of the relevant information. Mentioned the mainstream direction of lithium-ion batteries of electric cars, lithium batteries, the most familiar should be byd iron battery, and tesla's cell phone lithium battery. Iron battery or lithium iron phosphate battery ( LFP） , cell phone lithium battery for aluminum nickel and cobalt acid lithium batteries ( NCA） , there is a very promising ternary lithium batteries ( NCM） 。 They are due to the different anode materials, so the name is different. Lithium iron phosphate batteries in China has achieved great success in the market. In the world, are the biggest market of lithium iron phosphate battery in China. LFP's biggest advantage is its thermal stability is very good, popular, is the safety of the LFP is very good. It is also the major oems first entered the electric car market choice. The current mainstream of domestic electric vehicles, such as the e6, teng, brilliance BMW's, baic e150 etc. , were LFP as its monomer battery. Lithium iron phosphate battery, of course, a big disadvantage, is its low energy density, which greatly limits the pure electric range of electric vehicles. Three yuan battery, as the name implies, is composed of three kinds of material the anode of lithium ion batteries. Here, three yuan especially using nickel cobalt manganese battery for ternary lithium ion battery cathode material ( NCM） 。 The international mainstream manufacturers, BMW i3, E - of the masses GOLF and many other models are using sliding do its monomer. In the domestic market, baic EV200 and jianghuai iEV5 etc, also have upgraded to three yuan batteries. Than batteries, lithium iron phosphate ternary battery in energy density and power density, have very big improvement. At present, three yuan monomer battery energy density can reach 160 ~ 170 wh/kg, and lithium iron phosphate batteries, only around 120 ~ 130 wh/kg. Ternary cell is the future development direction of power battery market, with the deepening of the research work, the ternary battery will get more extensive application in the field of electric vehicles. Aluminum nickel and cobalt acid lithium battery, can also be regarded as a kind of ternary battery, but it will be listed separately, because only use tesla. Compared with the first two batteries, NCA energy density is higher, its monomer battery energy density can reach 250 wh/kg, is almost twice the LFP. Of course, the problem of high energy density, NCA among the worst in the stability of the three batteries. Therefore, if you want to be very good control of these single cells, a powerful battery management system is very necessary. Overall, low price and sufficient amount of iron battery, more suitable for low-end models, tesla's most expensive lithium-ion batteries but the capacity is the highest, just need good battery management technology, and need to make a lot of protection, in the battery pack is more suitable for high-end models. Ternary lithium battery price and capacity is more clever, more likely to become the mainstream of the current and future a period of time the battery technology. Concentrate on electric lithium battery and lithium battery customization, production, wholesale. Should countries green travel, environmental protection power supply. Using the ternary lithium battery, let your car more powerful. This article from: sohu