Cycle Life of Lithium Iron Phosphate Battery And Its Influencing Factors

1.Lithium iron phosphate battery Is used att room temperature

-Small current charge and discharge

 In the application of lithium iron phosphate battery in this field, the normal use of the basic is more than 2000 cycle life; Small lithium battery manufacturers, the quality of a little bit less also have more than 1000 cycles

• -High rate stable charge and discharge use

•  Most of the applications of high rate discharge are power type lithium batteries, most of which are applied in the application of powering the motor. Because most lithium iron phosphate batteries operate under high load conditions, the battery material decay time is accelerated, and the cycle life is about 800 times.

• -High rate unstable charge and discharge use

• The lithium iron phosphate battery used in this case will have a shorter life of only about 300 times.

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• 2.Lithium iron phosphate battery is used in high temperature environment

•  The high temperature performance of lithium iron phosphate battery is not very mature at present. The operating temperature range is -20℃ to 125℃, which is the theoretical value, but the practical application temperature range is smaller.

• -Small current charge and discharge

   In the application of lithium iron phosphate battery in this field, if it is a battery brand manufacturer with relatively strong strength, good quality, the cycle life is more than 1000 times; Small lithium-ion battery manufacturers, slightly lower quality also have more than 500 cycle life; Because the use of high temperature, the damage to the battery is relatively large.

  -High rate stable charge and discharge use

   Because most lithium iron phosphate batteries operate under high load, which speeds up the decay time of battery materials, the cycle life is sharply decreased, and the cell with poor quality may only have about 300 cycles. The strength of the battery brand manufacturers, in the equipment technology and material application will be better, cell quality will be better, but the cycle life is about 500 times.

  -High rate unstable charge and discharge use

   High temperature and discharge rate unstable operation, the damage to the battery is greater, the cycle life is relatively low, several battery manufacturers cell test found that 250 to 300 times, the basic use of the battery is not

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  3. Lithium iron phosphate battery is used in low temperature environment

   Low temperature environment has a greater impact on the performance of lithium iron phosphate battery than high temperature. According to the current market situation, the life of lithium iron phosphate battery is significantly reduced when it works from -20℃ to -40℃, and the cycle life is about 300 times.

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• 4. Influencing factors of cycle life of lithium iron phosphate battery

• -Charge and Discharge
   When choosing a charger, it is best to use a charger with a correct termination of the charging device to prevent the lithium iron phosphate battery from shortening its service life due to overcharging. Generally speaking, slow charging can extend the life of the battery more than fast charging.
  -Depth of Discharge
   The depth of discharge is the main factor affecting the life of the lithium iron phosphate battery. The higher the depth of discharge, the shorter the life of the lithium iron phosphate battery. In other words, as long as the depth of discharge is reduced, the service life of lithium iron phosphate batteries can be greatly extended. Therefore, we should avoid overdischarging lithium battery UPS to extremely low voltage.
  -Working Environment
   If the lithium iron phosphate battery is used at high temperature for a long time, the electrode activity will be attenuated and the service life will be shortened. Therefore, it is a good way to prolong the life of the lithium iron phosphate battery by keeping it at a suitable operating temperature as much as possible.