The lifespan of ternary lithium batteries is typically around 10 to 15 years.
The number of charge and discharge cycles of the ternary lithium battery is about 2,000 times, and the theoretical value is 3,500 times, i.e. that the battery attenuation is less than 20% after 3500 times. charging and discharging. In actual use, the battery life will be greatly affected by the manufacturer's manufacturing technology, battery management technology, external environment, car owner's driving habits, charging methods, etc.
Under normal circumstances, it can be used for 10 years. Generally, the three-electric warranty of car manufacturers is 8 years and 120,000 kilometers. Some car manufacturers also offer a three-electric lifetime warranty. If it is not ordinary domestic use, but'operational use, it will be difficult to use it for eight years. With the development of battery technology, including innovations in new battery materials, battery management technology and battery structure, the performance of power batteries has become more durable and safer.
Factors affecting the service life of ternary lithium batteries
During use, due to improper use, irreversible electrochemical reactions occur. will produce inside the lithium battery, leading to. a decrease in capacity, such as the decomposition of the electrolyte inside the battery and the loss of activity of the active materials inside the battery, will directly lead to a sharp reduction in battery life ternary lithium.
Of course, the end of the battery life of the electric vehicle does notdoes not mean that the battery cannot be charged or discharged, but that the discharge capacity of the battery at this time has greatly decreased compared to the new state of the battery if it continues to be used, which will bring a bad experience car to users. Since power battery life standards were established a few years ago, the battery capacity was low and the range of electric vehicles was short. The autonomy was reduced to less than 80% of new batteries. I feel like the battery life has been significantly reduced.
For example, the range is originally 200 kilometers, but the battery has dropped to 80% and it needs to be recharged after driving 160 kilometers. Nowadays, the range of electric vehicles is already high and 20% attenuation is no longer so good for users' car experience.
Concerning the problem ofWhen charging lithium batteries, is the reduction in capacity linked to the charging voltage?
Lithium iron phosphate batteries will fail if not used for a long time. During the life of lithium iron phosphate batteries, they are usually on the shelf most of the time. over a long period of time, battery performance will decline, which usually manifests itself as internal resistance. As the voltage increases, the voltage decreases and the discharge capacity decreases.
When lithium batteries are idle, due to the nature of the battery itself, phenomena such as self-discharge, passivation of positive and negative electrode materials and decomposition of the electrolyte occur. The unstable performance of the negative electrode SEI will cause the active material of the negative electrode to rapidly decrease and easily cause precipitation.ation of metallic lithium. At the same time, different components of the electrolyte have different effects on the attenuation of electrode materials. It is therefore particularly important that lithium batteries have good long-term storage performance.
The lithium-ion battery is a relatively complex electrochemical system. After long-term storage, the internal balance will gradually change. When accumulated to a certain extent, lithium batteries tend to undergo the following changes:
1. The physical characteristics of lithium batteries vary depending on the storage time of lithium batteries .It has been proven over time that the physical characteristics (appearance, size, weight, etc.) of the battery will undergo certain changes, especially the appearance characteristics. This changing trend is most evident when the temperature and humidity of the environmentt storage is not good. Under high humidity, the increasing importance of lithium batteries after long-term storage is significantly greater than that of batteries placed in low humidity conditions. For example, the steel housing of the battery tends to rust in high humidity conditions, resulting in a slight improvement in quality. Rust will not affect the internal condition of the battery, but will directly affect the shipping of the product and may have a negative impact on the corresponding electronic components.
2. Electrochemical characteristics ● Capacity, long-term storage The change in capacity of lithium battery is mainly reflected in two points:
One is the decrease in capacity of the battery, mainly caused by self -discharge; the other is irreversible. The increase in capacity mainly depends on the irreversible consumption reaction between thes chemical systems inside the battery. Self-discharge is inevitable in all lithium-ion batteries.
●Internal resistance. For long-term storage of lithium batteries, the resistance tends to increase as the storage time increases. Exceeding a certain internal resistance will cause the internal battery to exceed the baseline and be discarded or degraded. Therefore, it is necessary to pay attention to the change in battery resistance during long-term storage.
●Discharge characteristics. The discharge characteristics of lithium-ion batteries show a decreasing trend after long-term storage. The low temperature performance of batteries stored for a long time is significantly reduced.
Lithium battery life is affected by operating temperature and ambient humidity. TempeHigh humidity and scratches will accelerate the life of rechargeable lithium batteries. It is recommended to store rechargeable batteries in a dry, natural environment between 0°C and 20°C. If the lithium battery is not used for a long time, it should be charged to 50% ~ 80% capacity, removed from the instrument and stored in a dry and cool environment. The battery should be charged every 3 months to avoid prolonged storage and battery self-discharge. Too low, leading to irreversible loss of capacity. If a lithium battery emits an odor, generates heat, changes color, becomes deformed, or appears abnormal in any way during use, storage, or charging, immediately remove the battery from the device or charger and stop using it.
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La tension does not decrease, it is full of voltage It is still 4.2V, and the minimum discharge voltage is 2.85V. Generally, it cannot be driven when discharged to 3.2V and the remaining power cannot be fully used when the capacity is low, the internal resistance can be used. increases, the maximum discharge current becomes smaller and the maximum charge current also becomes smaller. If it is larger, it may generate more heat and be harmful to the battery;
You can increase the charger voltage. 4.35V full voltage and reduces charging current. Charging time is 4-5 hours. If you have the original charger, there will be no problem and there is no need to replace it.
The quantity of energy is estimated as a function of the voltage. 4.2V voltage is 100% power. If the voltage is low, the remaining power will be low.