About the characteristics of lithium ion battery is introduced

Source: 2020 - 03 - 28 15:07 hits: the characteristics of lithium ion battery ( 1) Due to the different anode and cathode voltage platform data, the working voltage of lithium ion batteries is 3. 7 - 4 v, the working voltage of the lithium iron phosphate battery with a bigger plan is 3. 2 v, 3 times of nickel metal hydride battery and lead acid batteries 2 times. ( 2) Is greater than the energy at the time, passenger car of lithium ion power battery energy density is close to 200 wh/kg, is expected to reach 300 by 2020 wh/kg. ( 3) Short battery life because of the limitation of electrochemical data characteristics of lithium ion battery cycles has not been broken. Lithium iron phosphate, for example, a single cell cycles can reach more than 2000 times, only after the group can reach more than 1000 times. Can't do the bus to work within eight years. ( 4) The environmental impact of large lithium ion battery using the light metal lithium, although do not contain mercury, lead and other harmful heavy metals, but is considered to be one of the green environmental protection, and less pollution. But in fact as the anode materials and electrolyte including nickel, manganese and other metals, the situation of the lithium ion battery is now classified as leaching toxicity, including flammable, corrosive, poisonous, harmful reaction cell, now all kinds of cells, including one of the most toxic substances, using technology, because its are mixed and disorderly capital is higher, so now back to the utilization rate is not high, throw away batteries more impact on the environment. ( 5) The cost is still high lithium ion battery of the initial purchase cost is very high. At the current mainstream bus power battery, lithium iron phosphate batteries, for example, the price is about 2500 yuan/KWH, with the wide application of electric vehicles, is expected to drop by 2020 to less than 1000 yuan/KWH. Due to a single battery limit by cycles, after the bus usually need to replace the battery in 3 years or so, so the cost of running unit pressure. ( 6) Has a great influence on the grid, the main program is the use of pure electric vehicles. Charging equipment, because of the large charging demand to power grid harmonic interference will be outstanding, affect the quality of power supply. Secondly, in the case of fast charging, charging power is relatively high, 50 kw passenger cars and 150 - 250 kw passenger car) Bigger, charging rate, larger influence on electric load. Therefore, according to the current of the lithium ion battery technology, its application range of electric vehicles in the pure electric vehicles within 200 kilometers.