How long can new energy batteries last? What factors affect the battery life

by:CTECHi     2021-09-09
How long can new energy batteries last? What factors affect the life of lithium-ion batteries? With the development of new energy vehicles, there are more and more innovations in new energy vehicle batteries. The power lithium batteries currently used in new energy vehicles are roughly divided into lead-acid batteries, lithium-ion batteries, and nickel-hydrogen batteries. The battery life of new energy vehicles. In recent years, new energy vehicles have gradually become the choice for people to buy cars, but with that comes the issue of battery life of new energy vehicles. Today we will talk about how long the new energy vehicle battery can last? What factors affect the life of lithium-ion batteries? How long can new energy batteries last? The first thing to be clear is that the service life of lithium batteries for new energy vehicles is generally not measured by time, but by the number of cycles. Since it is a cycle, there must be different charging points and power points when charging is terminated. If it is a deep charge and discharge, that is, a 0-100% cycle, an experimental data will be obtained at this time. Generally speaking, lithium iron phosphate batteries can be cycled about 2000 times, while current ternary lithium-ion batteries can generally be cycled about 1400 times. At present, the batteries used in new energy electric vehicles are generally lithium-ion batteries, with a service life of about 6 to 10 years. The service life of the battery is directly related to the operation method you use. If it is discharged with a large current for a long time, or the battery is often lost, the service life will be reduced. Usually, it is best to charge it in time when the battery is 30% remaining. Relevant regulations also require passenger car manufacturers to supply core components such as batteries and motors with a warranty of 8 years or more than 120,000 kilometers. The discharge current of the lead-acid battery is small, the model does not run fast, the fastest speed is about 60 kilometers, the life is short, and the cycle must be replaced in about 3 years. The advantages are: low production threshold, low price, lower requirements for protection circuits and equalization circuits, and basically it can be produced in hand-crafted workshops. Disadvantages: slow speed, low power, short life. Generally change in about 2-3 years. The warranty period of a new car is generally three years or more than 100,000 kilometers, and the life of the car battery is about 3 years. After this period, the car should pay special attention to the maintenance of the battery. If necessary, replace it in time to avoid danger. If during this period, the battery has a large number of power supplies, a large load, and a long time of use, the lifespan may be shorter. Many of the batteries in new cars are used for 3-4 years, but after replacing them once, they usually have to be replaced again in about 2 years. What factors affect the life of lithium-ion batteries? 1. Under normal circumstances, do not mix lithium-ion batteries with metal objects, lest the metal objects touch the positive and negative electrodes of the lithium-ion battery and cause a short circuit, damage the lithium-ion battery or even cause danger. Lithium-ion batteries should be stored in a ventilated and dry environment, away from high temperature and fire sources, to prevent high temperature and high humidity from affecting the performance of the lithium-ion battery and corroding the surface. 2. According to the conventional design of the car, the power consumed by the starter each time the vehicle is driven can only be replenished when the vehicle travels for 8-10 kilometers. Nowadays, some riders are driving short distances and are still on congested roads, so the electricity consumed when starting the engine cannot be fully recharged, and a lot of battery capacity will be consumed to start the engine at the next start, so the battery will start a vicious circle , Resulting in insufficient battery storage. When the storage capacity of the battery is less than 1/2 of the capacity, the battery begins to reduce its life in a geometric progression. 3. Different lithium-ion batteries have different optimal operating temperatures. Excessively high or low temperatures will affect the service life of lithium-ion batteries. As the temperature decreases, the discharge capacity of lithium-ion batteries will decrease. This is because as the temperature decreases, the ionic conductivity of the electrolyte decreases, causing the internal resistance of the lithium-ion battery to increase rapidly, resulting in poor output performance of the lithium-ion battery at low temperatures. 4. Improper working environment of lithium ion battery directly affects the length of life: the charging temperature of lithium ion battery is 0℃~45℃, the discharge temperature of lithium ion battery is -20℃~60℃; during the charging and discharging process of lithium ion battery, Do not overcharge or overdischarge lithium-ion batteries. Incorrect operation techniques when working with lithium-ion batteries, such as short circuits, are also the cause of the decrease in the service life of lithium-ion batteries. Regarding the charging of lithium-ion batteries, we should use a regular matching lithium-ion battery charger to charge the battery. 5. The influence of internal factors of lithium-ion batteries: such as side reactions of lithium-ion batteries; irreversible consumption of active materials in lithium-ion batteries; for large-scale lithium-ion batteries, the battery has a large operating current and slow heat dissipation, which is likely to cause damage to the battery structure; Additional safety protection measures for lithium-ion batteries must be maintained by the power supplied by the lithium-ion batteries. In theory, the battery life of new energy vehicles can reach ten years or even longer. At present, the life of new energy vehicles is generally only about five years, which means that the batteries of new energy vehicles can last for more than five years. After more than five years, the batteries begin to gradually decay, and the cruising range is not as good as one. In the end, they have to be replaced. Similar to traditional cars, new energy vehicles should also be charged in cycles when they are not used for a long time. A warm reminder that you must check the battery power consumption before charging.
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