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Three types of lithium batteries Mar 13, 2018

Currently on the market of consumer electronics products (like external Portable power bank) using lithium batteries can be divided into three categories:

Lithium iron phosphate battery

Advantages: Lithium iron phosphate battery belongs to lithium ion secondary battery, its discharge efficiency is higher, discharge rate of discharge rate of over 90%, higher than the low-speed electric vehicle used lead-acid battery 10% higher, and therefore suitable Used as a power battery. Lithium iron phosphate battery safety is also very good, can be maintained at a high temperature within 390 ℃ stable to ensure the battery's inherent high safety, will not overcharge, overheating, short circuit, impact and explosion or combustion, Can easily pass acupuncture experiment. And lithium iron phosphate battery does not contain any heavy metals, no direct harm to the human body. Lithium iron phosphate battery life is longer. Lithium iron phosphate battery after 80% fast charge, you can safely reach 4000 to 5000 times, 70%, you can also guarantee 7000-8000 times, the theoretical life expectancy can reach 7 to 8 years.

Disadvantages: Compared to other types of power batteries, lithium iron phosphate batteries higher prices, and smaller battery capacity, the same battery capacity, weight of lithium iron phosphate batteries heavier, larger, seriously affecting the life of the electric car . In addition, lithium iron phosphate batteries basically can not be recycled after retirement, there is no recoverable value.

Three yuan lithium battery

Advantages: ternary lithium battery refers to the positive electrode material using lithium nickel cobalt manganese ternary cathode material of lithium batteries, energy density, higher volume than energy, and the price is relatively low.

Disadvantages: and can not pass the needle assassination experiments show that the ternary battery in the internal short circuit, the battery case damage, it is easy to cause fire, explosion and other safety incidents. In addition, due to the nature of the material, the ternary lithium battery is relatively short in service life. Meanwhile, due to the global shortage of nickel and cobalt resources, the large number of applications of the ternary lithium battery may lead to the rise of the market price and the future cost of the car.

Lithium manganese oxide battery

Advantages: Lithium manganese oxide battery has good safety performance, and the tap density larger, the same volume of the battery can hold more material, have a higher power. As manganese reserves high, rich in resources, the cost of manufacturing lithium manganese oxide batteries are also lower, can reduce the cost of car buyers.

Disadvantages: Due to the nature of manganese itself is not stable, easy to decompose gas, it is often used in combination with other materials to reduce cell costs, but its cycle life decay faster. At the same time, the instability will make the battery itself easy to bulge. In addition, compared with other lithium-ion materials, lithium manganese oxide batteries are also poor high temperature performance, relative life expectancy will also be affected.

sony in 1992 developed the first lithium-ion battery. Its practical, so that people's mobile phones, laptops and other portable electronic devices weight and size greatly reduced. Use of time greatly extended. As lithium-ion batteries do not contain heavy metal chromium, compared with nickel-cadmium batteries, greatly reducing the pollution of the environment.