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Which power lithium-ion battery is best?

by:Vglory      2021-04-02
Which is better for power lithium batteries? At present, the most promising cathode materials for dynamic lithium batteries are lithium manganese oxide (LiMn2O4), lithium iron phosphate (LiFePO4) and nickel drilling lithium manganese oxide (Li(Ni,Co,Mn)O2). ) Ternary materials. Due to the lack of drilling resources and nickel, high drilling costs, and large price fluctuations, it is generally believed that it is difficult to become the mainstream of lithium batteries for electric vehicles, but they can be mixed with spinel lithium manganate within a certain range. After that, there were lithium manganese oxide batteries (LiMn2O4) and lithium iron phosphate batteries (LiFePO4). Which one is more suitable for lithium batteries? The following is a comparison of their advantages and disadvantages: Advantages of lithium iron phosphate batteries 1. Improved safety performance The p-o bond in the lithium iron phosphate crystal is stable and not easily damaged. Even in the case of high temperature or overcharge, the structure will not collapse like lithium cobalt oxide, will not generate heat or form strong oxidizing substances, so it has good safety. 2. Improve life. Lithium iron phosphate battery refers to a lithium battery using lithium iron phosphate as the cathode material. The cycle life of long-life lead-acid batteries is about 300 times, and the highest is about 500 times, while the cycle life of lithium iron phosphate power lithium-ion batteries is more than 2000 times, using standard charging (5 hours rate), which can reach 2000 times. Lead-acid batteries of the same quality are the new half year, the old half a year, and the maintenance and maintenance for half a year. The longest service time is 1 to 1.5 years, while the lithium iron phosphate battery is used under the same conditions, and the theoretical life can reach 7 to 8 years. In general, the performance-price ratio is theoretically more than four times that of lead-acid batteries. High current 2C, fast charge and discharge. With a dedicated charger, the battery can be charged 1.5c in 40 minutes, and the starting current can reach 2C, but lead-acid batteries have no such performance. 3. Good high-temperature performance, the maximum electric temperature of lithium iron phosphate can reach 350℃-500℃, while the maximum electric temperature of lithium manganate and lithium cobaltate is only about 200℃. Wide operating temperature range (-20c-75C), the maximum electrical temperature of high-temperature resistant lithium iron phosphate can reach 350℃-500℃, while the maximum electrical temperature of lithium manganate and lithium cobaltate is only about 200℃. 4. Large capacity When the battery continues to run at full load, it will quickly drop below the rated capacity. This phenomenon is called the memory effect. Like nickel-metal hydride batteries and nickel-cadmium batteries have memory, while lithium iron phosphate batteries do not have this phenomenon. No matter what state the battery is in, it can be charged and used at any time without having to turn it off before charging. 6. Lightweight, the volume of a lithium iron phosphate battery with the same capacity is two-thirds of that of a lead-acid battery, and its weight is one-third of that of a lead-acid battery. 7. Environmentally friendly lithium iron phosphate batteries are generally considered to be free of heavy metals and rare metals (nickel-hydrogen batteries should be rare metals), non-toxic (SGS certified), non-polluting, comply with European RoHS regulations, and are absolutely green battery certificates. Therefore, lithium batteries are favored by the industry mainly because of environmental considerations. Therefore, lithium batteries have been included in the 863 National High-tech Development Plan during the Tenth Five-Year Period and have become a key national support and encouragement project. With my country's accession to the WTO, my country's electric bicycle exports will rise rapidly, and electric bicycles entering Europe and the United States already require pollution-free batteries. However, some experts pointed out that the environmental pollution caused by lead-acid batteries mainly occurred in the company's irregular processing and recycling processes. Similarly, it is good for lithium batteries to belong to the new energy industry, but it cannot prevent the problem of heavy metal pollution. Lead, arsenic, cadmium, mercury, chromium, etc. produced by metal materials may be released into dust and water. The battery itself is a chemical substance, so there may be two types of pollution. The second is battery pollution after scrapping. Lithium iron phosphate batteries also have their disadvantages: for example, low-temperature performance, low vibration density of the cathode material, the same volume of lithium iron phosphate batteries than lithium cobalt oxide and other lithium batteries, so there is no advantage in micro batteries. When using lithium iron phosphate batteries for power lithium-ion batteries, like other batteries, they have to face the problem of battery consistency. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to use Ni-MH rechargeable batteries correctly?
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