Will the lifespan of lithium iron phosphate batteries decrease after 5 years of use.
Lithium iron phosphate batteries have an extremely long service life, with a 100% deep cycle of over 5000 times per cell. In theory, the maximum service life can reach ten years, and the designed annual production capacity is 20000 KWH. Lithium iron phosphate batteries themselves can achieve more than 3000 charge and discharge cycles, and their lifespan is much superior to ternary lithium batteries.
Most new energy electric vehicles adopt lithium iron phosphate batteries. In fact, Qin's battery capacity is 13 kilowatt hours, while Tang's battery capacity has been increased to 18 kilowatt hours, with a pure electric range of 85 kilometers. Lithium iron phosphate power batteries have a cycle life of over 2000 cycles or more, and can be used for over 2000 cycles on standard charging (5-hour rate). Lead acid batteries of the same quality have a lifespan of "half a year for new, half a year for old, and half a year for maintenance", which is at most 1-1.5 years. However, lithium iron phosphate batteries, when used under the same conditions, should have a lifespan of more than 7-8 years. Taking into account all factors, the safety performance price ratio is theoretically four times or more that of lead-acid batteries.
Advantages of lithium iron phosphate batteries
1. The energy ratio is relatively high. Long service life
Lithium iron phosphate batteries have high storage density, currently reaching 460-600 Wh/kg, which is about 6-7 times that of lead-acid batteries; The service life of lithium iron phosphate battery pack can reach six years or more;
2. The additional voltage is high (with a single operating voltage of 3.7V3.2V), and it has a high power output equivalent to the series voltage of three nickel cadmium or nickel hydrogen rechargeable batteries, which is beneficial for forming a battery power pack; The lithium iron phosphate battery used in electric cars has the ability to charge and discharge at 15-30 ° C, which is beneficial for accelerating high-intensity starting;
3. Low self discharge rate and light weight
This is also one of the most outstanding advantages of the battery. Nowadays, it can achieve less than 1% per month, which is largely less than 25-30% of Ni Cd and 30-35% of Ni and MH; The weight of lithium iron phosphate batteries with the same volume is about 1/5-1/6 of lead-acid battery products;
4. Strong applicability for upper and lower temperatures, able to be used in the range of -20 ° C to 60 ° C, and can be used in the range of -45 ° C according to the production process.
Will the battery life decrease after five years of use
It will gradually decay and decrease. Lithium iron phosphate batteries refer to
lithium-ion batteries that use lithium iron phosphate as the positive electrode material. The cycle life of long-life lead-acid batteries is around 300 times, with a maximum of only 500 times, while lithium iron phosphate power batteries have a cycle life of over 2000 times or more, and can be used for over 2000 times on standard charging (5-hour rate). The lead-acid battery version of the same quality is "new half year, old half year, and maintenance half year", with a maximum of 1-1.5 years, while the lithium iron phosphate battery should have a lifespan of more than 7-8 years under the same conditions.
In fact, the safety performance of
lithium iron phosphate batteries is already quite good. Improper handling of the battery will seriously damage its lifespan. Especially the impact of deep charging and deep discharging is significant. The best way is to focus on shallow discharge and shallow charging. Mastering this feature will greatly improve the performance. If the battery itself has poor quality, it's another matter.
