Electric vehicle lithium iron phosphate battery real life can use how many years
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2022/11/15 14:48:31
Electric vehicle lithium iron phosphate battery real life can use how many years? Many friends say that electric vehicle lithium iron phosphate battery will decay after 5 years, is it true? For new energy vehicles, battery life is mainly divided into cycle life and service life. The cycle life of the lithium iron phosphate battery can reach more than 2000 times, but we still calculate the cycle life by 80%, which is 1600 times.
What is a lithium iron phosphate battery?
Lithium iron phosphate battery is a kind of lithium ion battery, is a lithium ion battery using lithium iron phosphate as the positive material. It is characterized by strong safety and stability, high temperature resistance and good cycle performance. Like the ternary lithium battery, the theoretical life of the lithium iron phosphate battery is also more than 2000 charging and discharging cycles, even if one charge a day, it can maintain more than five years. Generally speaking, the daily household charge is three days and can be used for about eight years. However, due to the low temperature performance of the lithium iron phosphate battery is poor, so in the south, the life of the lithium iron phosphate battery will be relatively longer.
Advantages of lithium iron phosphate batteries
1. High energy ratio. Lithium iron phosphate battery has a high storage density, now has reached 460-600Wh/kg, is about 6-7 times of lead-acid battery;
2. Long service life, the service life of lithium iron phosphate battery pack can reach more than 6 years;
3. High extra voltage (single working voltage is 3.7V3.2V), about equal to the series voltage of 3 nickel-cadmium or nickel-metal hydride rechargeable batteries, easy to form a battery power supply group;
4. With high power acceptance, the lithium iron phosphate battery for electric cars can reach the capacity of 15-30C charging and discharging, which is easy to accelerate the high strength start;
5. Low self-discharge rate, which is one of the most outstanding advantages of the battery, now generally can do less than 1%/ month, much lower than NI-CD 25-30%, Ni, MH 30-35%;
6. Light weight, the same volume of lithium iron phosphate battery component is about 1/5-1/6 of lead-acid battery products;
7. The upper and lower temperature applicability is strong, can be used in the condition of -20°C-60°C, through the process of disposal can be used in the environment of -45 degrees.
Electric vehicle lithium iron phosphate battery real life can use how many years?
The lithium iron phosphate battery has a very long service life. The single battery can reach 5000 times of 100% deep cycle, and the theoretical service life is up to 10 years. The designed annual production capacity is 20,000 KWH. The lithium iron phosphate battery itself can achieve more than 3000 times of charge and discharge, in terms of life is much better than the three-way lithium battery.
The BYD Tang uses the same lithium iron phosphate battery as the Qin, but the Qin's battery capacity is 13 kW · h, while the Tang's battery capacity is increased to 18 kW · h, with a pure battery life of 85 kilometers. Lithium iron phosphate power battery, cycle life of more than 2000 times, standard charge (5-hour rate) use, can reach 2000 times. The same quality of lead-acid battery is "new half a year, old half a year, maintenance and maintenance of another half a year", the maximum time is 1~1.5 years, and lithium iron phosphate battery under the same conditions, the theoretical life will reach 7~8 years. Overall, the performance price ratio is more than 4 times of the theoretical lead-acid battery.
Although the battery life of BYD Tang electric car has not been officially clarified, from the performance of lithium iron phosphate battery, 7-8 years should not be a problem for the battery. However, with the increase of charging times, the battery loss will rise. Whether the manufacturer can provide battery buyback and other after-sales service projects is another big selling point to attract consumers.
Ternary lithium battery, the theoretical cycle life is about 1500 times, in the actual use, the complete charge and discharge cycle is more than 800 times, and the control battery discharge in 25%-75% state, the actual use can reach more than 1200 times. With the general three-way lithium battery electric vehicle endurance of 200 kilometers, a complete cycle can actually travel in 180 kilometers, 800 cycles can walk 144,000 kilometers, counting the normal attenuation, 120,000 kilometers is no pressure.
The charge and discharge cycle life of lithium iron phosphate battery can generally reach more than 2000 times. Even for the car with a battery life of only 70 kilometers, 2000 cycles can also support the pure electric driving of 140,000 kilometers. The only disadvantage is that the energy density is low and the low temperature attenuation is obvious.
Summary: With the development of the industry, the lithium iron phosphate battery technology is gradually mature, the service life of the battery will become longer, the replacement price will become lower. For family cars, the rated cycle life of ternary lithium battery and lithium iron phosphate battery is far more than the actual usage habits of users, and also exceeds the current average cycle of Chinese consumers, so the service life can be completely assured.
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