18650 rechargeable battery lithium 3.7v 3500mah
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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah

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What are the factors that affect the performance of lithium battery.portable energy storage battery power supply Factory

release time:2023-04-10 Hits:     Popular:AG11 battery

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  The attenuation rate of lithium -ion batteries is affected by various factors, such as using temperature, charging and discharge current, charging and discharge interception voltage, etc. There are three main capacity attenuation mechanisms for lithium -ion batteries: internal resistance, polarization new, positive active substance loss, and lithium loss.

  The impact of different external conditions on the above three situations is also different. Lithium -ion batteries, such as LIFEPO4, have good circulation characteristics, but the differences in its use environment have a great impact on its cycle life.

  The experimental results show that when the 26650 lithium ion battery is continuously discharged at 15 C and 15 C, the impact of the two discharge methods on the 26650 lithium -ion battery is completely different. 15 C's 26650 lithium -ion batteries After charging 40 times, the energy attenuation is fast. Although it cannot be discharged 15 ° C after 40 times, 1 C is still possible. 15 C continuously discharge, the volume attenuation of the battery is relatively slow. After 60 times, it can still discharge 15 c, but the attenuation of 1 C is faster than 15 C.

  Through the study of lithium -ion battery life attenuation, it can provide theoretical basis for the development of lithium -ion batteries in the future. This article discusses the use mechanism of lithium ion batteries and gives a mathematical model for life attenuation.

  Through mechanism analysis, it is found that under the pulse discharge conditions of 15 C, the LIF content in the positive EV film is high, but the LIF has a large hindrance effect on the diffusion of lithium ions. Therefore Increase increases the polarization voltage when the battery is charged and discharged, resulting in a sharp decrease in LifePO4 large current discharge capacity.


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