The fast charging technology of iron phosphate lithium ion battery was analyzed
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2022/08/26 15:16:34
Different battery data systems have different advantages and disadvantages, and new battery data systems are constantly appearing, showing a trend to be better than blue. The system is gaining popularity especially after the release of the ternary data on electric buses. The mainstay of battery data systems at the time, what other killer could guarantee that lithium iron phosphate data systems would stand on their own as their energy density approached the ceiling? The development prospect of iron phosphate lithium ion battery is widely concerned.
The danger of lithium iron phosphate
The positive electrode data of lithium ion battery mainly includes lithium cobalt acid, lithium manganese acid, lithium nickel acid, lithium iron phosphate, ternary data, etc. In principle, lithium iron phosphate is also a process of embedding/de-embedding of lithium ions, which is the same as lithium cobalt oxide and lithium manganate. Lithium iron phosphate, which is often compared to ternary lithium-ion batteries, is a bone of contention in the industry.
Under a certain temperature information differentiation attack, three metadata in 200 degrees Celsius, the onset of differentiation and lithium iron phosphate material differentiation at 800 degrees Celsius, which means that the ternary information is more likely to be a piece of the fire accident, three yuan iron phosphate lithium ion battery to do and the same level of security level, higher skills and technical requirements.
But lithium iron phosphate has a lower energy density than a ternary battery. Iron phosphate lithium ion batteries have an energy density of about 145Wh/kg, while ternary lithium ion batteries have a relatively high energy density of about 220Wh/kg. Therefore, due to the data nature of lithium iron phosphate, the frequently transmitted lithium iron phosphate batteries in the industry have limited energy density and may be replaced by other battery systems in the future.
At present, with more and more attention paid to intellectual property rights, lithium iron phosphate is less than 3 yuan, which restricts the development of lithium iron phosphate battery. The earliest patent application for lithium iron phosphate was obtained by FXMITTERMAIER&SOEHNEOHG(DE) on June 25, 1993, and the result was published on August 19, 1993. The underlying patent for li-ironphosphate, held by the universityofTexas, and for carbon-coating patents filed by canadians are hard to get around. Institutions and the auto industry in 2017 of nickel cobalt manganese ternary lithium ion battery industry's global patent statistics show that whether other countries patent layout is still in China, technological innovation protection consciousness, the ternary lithium ion battery manganese cobalt nickel technology development hot spot, nickel cobalt manganese in China an application for a patent for the ternary lithium ion battery is leading in the world. Therefore, in terms of patents, lithium iron phosphate is less advantageous than ternary batteries.
In terms of energy density, lithium iron phosphate has a slightly lower upper limit, leaving little room but providing users with a window into charging speeds. As a technical path that must be overcome in the development of new energy vehicles, fast charging has obvious effects in alleviating driving distance anxiety and shortening charging time. Therefore, fast charging has become the development direction of car companies and battery companies, and it is also a bright spot for the future application of iron phosphate lithium ion batteries.
Announced at the end of December 2016, in addition, the new energy vehicle subsidy adjustment method, 3C-05C and 5C-15, 15C + C three levels of fast charging rate, respectively 0.8 times,1 time,1.4 times, under the encouragement of the policy, the use of lithium ferrous phosphate skills of the company has increased efforts to develop fast charging, fast charging lithium ferrous phosphate battery manufacturing A new breakthrough.
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