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New energy vehicles are different, but lithium battery, the core part of new energy vehicles, is much simpler. It can be divided into four kinds, and its advantages and disadvantages are also obvious.
Lithium-ion cobaltate batteries
The lithium-cobaltate battery makes use of the relatively early power lithium-ion battery, the one used by Tesla's Roster when it rolled out a Roster just before the Models. The advantages are relatively high capacity and density, and the battery per unit volume can store more power. The disadvantages are safety and poor stability, which are generally used in the field of digital electronics. However, electric vehicles have high safety requirements for power lithium batteries, so Tesla also gave up lithium cobaltate batteries.
Lithium-ion iron phosphate batteries
Speaking of lithium-ion iron phosphate battery, the first thing I think of is BYD car. BYD has been insisting on the research and development of lithium-ion iron phosphate battery, and is in the absolute leading position, can be said to be a dominant company. Iron phosphate lithium ion battery is the advantages of security is very high, very stable, high temperature and collision, won't be an explosion, but the downside is, obviously, is the low energy density, power equal to more space and weight, about attaches great importance to the space and the fuel consumption of the private cars, the iron phosphate lithium ion battery is obviously not a good home to return to, So BYD, which has always been fond of lithium iron phosphate, had to turn to the embrace of ternary lithium ion batteries, gradually promoting the use of ternary lithium ion batteries in private cars, while still using ternary lithium ion batteries in public buses.
Ternary lithium ion batteries
Ternary lithium ion battery has the advantage of large capacity density, super power range, the disadvantage is that security is poorer, but better than that of cobalt acid lithium ion battery, so adopted by mass, whether tesla, audi and BMW's new energy vehicles, all is the use of the ternary lithium ion battery, ningde era is to seize the trend of the ternary lithium ion battery has become the unicorns.
Lithium manganese oxide ion battery
Manganese acid lithium ion battery is now more mainstream power lithium batteries, although everything is not very outstanding, but is very balanced, comprehensive ability is very strong, the energy density of medium, cheap, and safe environmental protection, which is accord with Japan and South Korea the demand, so the Japanese and south Korean manufacturers use is more, the nissan leaf is using manganese acid lithium ion battery. Compared with lead-acid batteries, lithium-ion batteries have weaker low-temperature performance and higher current performance, which is absolutely unfavorable for starting power. Lead-acid batteries are designed to discharge in more harsh environments, whereas lithium-ion batteries do not work well in cold climates. In addition to low temperatures, the heat of the engine compartment in the 60s and 70s can easily kill lithium electrons in the summer sun. In terms of high current performance, the instantaneous current of the car at startup is mostly above 200A, and the performance of lithium-ion batteries will rapidly decline at high magnification.
2. Technology cost
Lead-acid batteries are cheaper than lithium-ion batteries, a decisive factor in their popularity. The same capacity, lead-acid battery technology developed mature, electrode materials, electrolyte, assembly environment requirements are low, so that the cost is reduced, and the preparation of lithium ion battery technology is complex, to control the requirements of dust, relative humidity, precision, so that the cost is more than 3 times more expensive than lead-acid battery.
3, the degree of safety
The heat released at the moment when the power is started will put the car in a dangerous situation. As mentioned in the battery performance, lithium ion batteries are easy to scrap and catch fire at high temperature. Lead-acid batteries perform well in large currents, and the material is not flammable in case of danger. Lithium ion batteries use graphite as a material, flammability is certainly high.