Introduction to three common battery types

Types of electric vehicle batteries-lithium cobalt oxide battery technology As a high-performance sports car in electric vehicles, Tesla's requirements for batteries are of course also performance-oriented. This is why it chooses lithium cobalt oxide battery technical efficiency first, with large discharge current, high charging speed, and light weight. In fact, lithium cobalt oxide batteries are not unfamiliar to ordinary people. This battery technology has been popularized in small electrical appliances such as flashlights and notebooks. To a certain extent, everyone is the beneficiary of this advanced lithium-ion battery technology. . However, high profits are often accompanied by high risks, and the stability of lithium cobalt oxide batteries is relatively poor. This is why it is difficult for this battery technology to produce large-capacity battery cells. The safety technical problems have not been completely solved. Therefore, Tesla chose a very unique technical solution. Taking the P85 model as an example, it used more than 8,000 encapsulated 18650 battery cells to combine, thus avoiding the production of large-capacity battery cells with lithium cobalt oxide battery technology. Technological gap. Then use extremely complex battery management technology and peripheral circuits to balance the charging and discharging process of so many battery packs, and isolate the batteries by several independent battery compartments, and then use high-strength aluminum alloy guard plates and frame structures. Carry out physical protection to minimize the possibility of security problems. Types of electric vehicle batteries-Lithium manganate battery technology Japanese manufacturers’ choices are relatively balanced. Lithium manganate battery technology is not as radical as lithium cobaltate batteries. Since metal cobalt is not used, the cost is much lower. This sounds like a continuation of the electrification of Japanese economically applicable strategies. In fact, lithium manganate batteries appeared as a low-cost alternative technology for lithium cobalt oxide batteries. Sacrificing a little efficiency and a little stability, in exchange for the advantage of easier popularization, this transaction is very cost-effective. Another important feature of lithium manganate batteries is that they are conducive to the production of large and medium-sized batteries. Therefore, for battery packs for electric vehicles, fewer battery cells can be used, and the requirements for power management are not like those of lithium cobalt oxide. As complicated as ion batteries. Lithium manganate battery has better low temperature performance and is more suitable for use in cold areas. But the high temperature stability is not good enough, easy to swell, and the cycle life decays quickly are its shortcomings. Therefore, the actual battery capacity of Japanese electric vehicles is often much larger than the theoretical capacity calculated according to the calibrated power and cruising range. The larger redundant space is to allow electric vehicles to maintain the nominal endurance in the latter part of the life cycle. . Types of Electric Vehicle Battery-Lithium Iron Phosphate Battery Lithium Iron Phosphate Battery The last type of lithium iron phosphate battery is known as the safest automotive battery technology, because it is compared to lithium cobaltate and lithium manganate. The stability of the battery, lithium iron phosphate battery, especially the stability at high temperature, is much more stable, and the probability of fire and other accidents when encountering unexpected situations is also smaller. However, the efficiency of the lithium iron phosphate battery is not as good as the aforementioned two battery technologies. The weight required to store the same energy is about twice that of the lithium cobalt oxide battery. It is no wonder why this new battery technology is difficult to become the choice of high-performance electric sports cars. . But having said that, in the field of electric vehicles that believe in the four-character motto of safety first, the application prospects of lithium iron phosphate batteries are still quite extensive. Although heavier, it is not unacceptable for larger models. Moreover, the electric motor inherently has the advantages of low speed and high torque, so it is not particularly taboo that the negative impact caused by the heavy battery weight is not particularly taboo. Speaking of negative impacts, the previous uproar of the Boeing 787 lithium-ion battery continued to catch fire, which caused many people in the aviation industry to talk about lithium discoloration. The Boeing 787 uses lithium cobalt oxide battery technology, which almost directly leads to a large number of airlines Restrictions or embargoes on large-capacity lithium-ion batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.