Lithium iron phosphate battery has been used for 5 years, will the battery life decrease?
How many years can the real life of a lithium iron phosphate battery last? Many people say that the lithium iron phosphate battery of a new energy electric vehicle will decay after five years of use. Is it true? For new energy vehicles, the battery life is specific Divided into two categories: cycle life and service life. The cycle life of lithium iron phosphate batteries can exceed 2,000 times or more, but we still calculate the cycle life as 80%, which is 1,600 times. Then let's take a look at the lithium iron phosphate battery for 5 years, will the battery life be reduced?
The lithium iron phosphate battery has been used for five years, and it can be used for about five years
The lithium iron phosphate battery has an ultra-long service life. The single battery can be cycled more than 5,000 times with a 100% deep cycle. It is reasonable to say that the service life can be up to ten years. The designed annual production capacity is 20,000 KWH. The lithium iron phosphate battery itself can be charged and discharged more than 3000 times, which is much better than the ternary lithium battery in terms of life.
Most new energy electric vehicles use lithium iron phosphate batteries. In fact, Qin's battery capacity is 13 kWh, while Tang's battery capacity has been increased to 18 kWh, and the pure electric range can reach 85 kilometers. The lithium iron phosphate power battery has a cycle life of more than 2,000 times and above, and can be used for more than 2,000 times with standard charging (5 hours rate). The lead-acid battery of the same quality is "new half year, old half year, and maintenance and maintenance for half a year", which is only 1 to 1.5 years at most, and lithium iron phosphate battery is used under the same conditions, it is reasonable to say that the lifespan will exceed 7~ 8 years. Comprehensive consideration, the safety performance price ratio is theoretically 4 times or more than that of lead-acid batteries.
Advantages of lithium iron phosphate batteries
1. The energy ratio is relatively high. long lasting
The lithium iron phosphate battery has a high storage density, and now it has reached 460-600 Wh/kg, which is about 6-7 times that of the lead-acid battery; the service life of the lithium iron phosphate battery pack can reach six years or more;
2. The extra voltage is high (the single working voltage is 3.7V3.2V), and the high power capacity is approximately equal to the series voltage of 3 nickel-cadmium or nickel-hydrogen rechargeable batteries, which is conducive to the formation of battery power packs; among them, iron phosphate for electric cars Lithium battery can reach 15-30C charge and discharge capacity, which is conducive to high-intensity startup and acceleration;
3. Low self-discharge rate and light weight
This is also one of the most outstanding advantages of the battery. Nowadays, it can generally be achieved at 1%/month, which is largely less than 25-30% of Ni-Cd, 30-35% of Ni and MH; iron phosphate Under the same volume of lithium battery, the weight is about 1/5-1/6 of lead-acid battery products;
4. High and low temperature applicability, can be used in the condition of -20°C-60°C, and can be used in the regional environment of -45°C according to the disposal of the production process.
Will the battery life decrease after five years of use?
It will gradually decay and decrease. Lithium iron phosphate batteries are known as lithium ion batteries that use lithium iron phosphate as the positive electrode material. The cycle life of long-life lead-acid batteries is about 300 times, and the maximum is 500 times, while the cycle life of lithium iron phosphate power batteries exceeds 2,000 times or more, and the standard charging (5-hour rate) can be used for more than two times. thousand times. The lead-acid battery version of the same quality is "new half year, old half year, and maintenance and maintenance for half a year", which is only 1 to 1.5 years at most, and lithium iron phosphate battery is used under the same conditions, it is reasonable to say that the life will exceed 7. ~8 years.
In fact, the safety performance of lithium iron phosphate batteries is already good. If it is not handled properly, it will seriously damage the life of the battery. In particular, the impact of deep charge and deep discharge is greater. The best way is to focus on shallow discharge and shallow charge. After mastering this feature, it will be greatly improved. If the quality of the battery itself is poor, it is another matter.