Lithium battery life cycles are based on what to order?

Source: 2020 - 04 - 03 21:48 hits: according to the quality of battery and battery materials to determine the lithium battery life cycle count: 1. The ternary material cycle number about 800. 2. Lithium iron phosphate battery cycles of about 2500 times. 3, quality goods and defective battery cycles are distinguished. Authentic cell cycle number is according to the battery manufacturer specifications to design and production of the cycle Numbers, the number of cycle and defective batteries can be less than 50 times. Ternary lithium battery life of lithium battery life is refers to the so-called battery in use after a period of time, capacity attenuation is nominal capacity ( Room temperature 25 ℃, the standard atmospheric pressure, 0. 2 c discharge battery capacity) Of 70%, can be thought of as the end of the life of the battery. In general, the cycle life of lithium-ion batteries is calculated according to the full discharge cycles. In the process of using, lithium battery internal irreversible electrochemical reaction will happen, resulting in a decline in production, such as the electrolyte decomposition, the deactivation of the active material and the positive and negative electrode structure collapse, leads to reducing the number of lithium ion embedded and deembedded, and so on. The experimental results show that the higher the discharge rate, the faster capacity attenuation. If the discharge current is low, the battery voltage will be close to equilibrium voltage, release more energy. The ternary lithium battery life is about 800 times the theory, in the commercial lithium rechargeable battery in the medium level. There are about 2000 circulation, lithium iron phosphate lithium titanate and it is said that there are 10000 cycles. The current mainstream battery manufacturers in their production of three yuan normative commitment (500 times Under the condition of the standard of charging and discharging) , but in the cells from the battery, due to the consistency problem, mainly is the voltage and internal resistance cannot be exactly the same, the cycle life of about 400 times. Manufacturers recommend using SOC window is 10% ~ 90%, it is not recommended for depth charge and discharge, otherwise the battery of the positive and negative structure cause irreversible damage. If the battery is calculated by charging and discharging light, so the cycle of the battery life is at least 1000 times. In addition, if lithium batteries are often in high power and high temperature environment, the battery life will be significantly reduced to less than 200 times.