In today's era of rapid technological development, lithium batteries, as the "heart" of various electronic devices, have been deeply integrated into our daily lives. Whether it is a mobile phone, a laptop, or an electric car, it is inseparable from the support of lithium batteries. However, everyone must have had such doubts: How long can lithium batteries last? Today, let's discuss this issue in depth.
1. Types and life basis of lithium batteries
There are many members in the lithium battery family, and the common ones are lithium cobalt oxide, lithium iron phosphate, and ternary lithium batteries. Different types of lithium batteries have certain differences in their theoretical lifespan. For example, although lithium cobalt oxide batteries have a high energy density and can make electronic devices have good battery life, their cycle life is relatively short, generally around 500-1000 times. The cycle life here refers to the number of complete processes from fully charged to fully discharged and then fully charged again. When this number of cycles is reached, the capacity of the battery will drop significantly and it will no longer be able to provide sufficient power like a new battery.
Lithium iron phosphate batteries are known for their high safety and long cycle life, and their cycle life can usually reach 2000-3000 times. This is why lithium iron phosphate batteries are widely used in some fields with high requirements for safety and battery life, such as energy storage power stations and some power tools.
Ternary lithium batteries combine the advantages of energy density and cycle life. The current mainstream ternary lithium battery cycle life is about 1000-2000 times, and with the continuous advancement of technology, this data is still increasing. It is widely used in the field of electric vehicles because it can not only ensure that the vehicle has sufficient mileage, but also meet the user's requirements for battery life to a certain extent.
2. The impact of the use environment on the life of lithium batteries
In addition to being affected by its own type, the use environment is also a key factor in the life of lithium batteries. The impact of temperature on lithium batteries is particularly significant. In a high temperature environment, the chemical reaction inside the lithium battery will accelerate, which may cause the battery capacity to decay rapidly, and even cause safety problems such as bulging and short circuit. For example, in the hot summer, if the mobile phone is exposed to a high temperature car for a long time, the battery life will be greatly damaged. Generally speaking, the optimal operating temperature of lithium batteries is around 25℃, at which temperature, the performance and life of the battery can be better guaranteed.
On the contrary, low temperature environment will also have a negative impact on lithium batteries. When the temperature is too low, the lithium ion activity inside the lithium battery will decrease, the internal resistance of the battery will increase, resulting in a decrease in the available capacity of the battery and a slower charging speed. I believe that many friends have had this experience in winter. The battery power of the mobile phone drops very quickly. This is the impact of low temperature on lithium batteries.
In addition, humidity is also a factor that cannot be ignored. Although the interior of the lithium battery is sealed, if it is in a high humidity environment for a long time, the outer shell of the battery may be corroded, which will affect the performance and life of the battery. Therefore, try to use and store lithium batteries in a dry and ventilated environment.
3. Charging and discharging habits and lithium battery life
Our daily charging and discharging habits also have a vital impact on the life of lithium batteries. The first is overcharging and over-discharging. Overcharging will keep the battery in a fully charged state, which will accelerate the aging of the battery and reduce the life of the battery. Over-discharging will cause the battery voltage to be too low, which may damage the internal structure of the battery. Now many electronic devices are equipped with overcharge and over-discharge protection circuits, but we cannot take it lightly because of this, and try to avoid keeping the battery in extreme charging or discharging states for a long time.
Secondly, the charging speed will also affect the life of lithium batteries. Although fast charging technology has brought us great convenience, when charging quickly, more heat will be generated inside the battery, which will have a certain damage to the life of the battery. If time permits, it is recommended to use ordinary charging methods as much as possible to reduce the frequency of fast charging.
4. How to extend the life of lithium batteries
After understanding the factors that affect the life of lithium batteries, we can take some measures to extend the life of lithium batteries. When using electronic devices, try to avoid charging the battery when the power is less than 20%, and do not wait for the battery to be fully charged and connected to the charger for a long time. In addition, pay attention to creating a good use environment for electronic devices, avoiding high temperature, low temperature and high humidity environments.
For lithium batteries in electric vehicles, regular deep charging and discharging can help the battery maintain good performance. At the same time, when the vehicle is parked for a long time, the battery should also be charged regularly to avoid excessive discharge of the battery.
In short, the life of lithium batteries is affected by many factors. Different types of lithium batteries have different lifespans. The use environment and charging and discharging habits will also have a significant impact on their lifespan. As long as we master the correct use method, we can extend the life of lithium batteries to a certain extent, so that our electronic devices and electric vehicles can better serve us. I hope that today’s sharing will give everyone a deeper understanding of the life of lithium batteries, and that they will treat lithium batteries more scientifically in future use.
