Do you know how to distinguish the quality of lithium iron phosphate batteries?

1. Consistency: If a lithium iron phosphate battery with poor consistency has a protective plate, according to the bucket principle, its capacity will be the lowest, so that the entire battery pack will not be able to fully release electrical energy due to one cell. It also cannot fully absorb electrical energy, and over time, the life of the battery pack will be short. If the battery pack is not equipped with a protective plate, not only will there be a loss of capacity, but there may also be safety issues and overheating and explosions. The method of testing consistency is to connect the cells to be tested in series, 4 in a group or 6 in a group, and do 1C charging and 3C discharging. During the charging and discharging process, just look at the difference in the rise and fall of the cell voltage. 2. Self-discharge rate: Since lithium iron phosphate batteries are often used for power lithium batteries, the power consumption is large, which requires the self-discharge rate of battery packs to be less than 2% per month. To achieve this, the above-mentioned consistency requirements must Indispensable, after the consistency test is qualified, the test method for the self-discharge rate is: charge the battery with the same capacity and let it stand for one month, and then measure its capacitance value. 3. High rate: Lithium iron phosphate battery packs that can withstand high rate charge and discharge have a strong ability to charge and discharge quickly. For lithium iron phosphate batteries, they must be able to charge and discharge quickly to meet their requirements for power lithium batteries. Requirements. The test method for high rate is: use the highest rate test according to the conditions provided by the lithium battery processing manufacturer. If there is an obvious serious heating problem during the charging and discharging process, the quality of the battery is not good. Generally speaking, the power lithium battery pack should meet the safety requirements of 3C charging and 30C discharging. 4. Long life: As a general requirement, lithium iron phosphate batteries have 85% capacity after 2000 times of 1C discharge, and 80% after 3000 times. Of course, each processing factory has different standards due to different technological levels and materials. The test method is theoretically based on the data supplied by the manufacturer. Whether the data supplied by the manufacturer is true or not, at present can only look at the brand effect, which depends on which brand the consumer believes. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What is the difference between lithium battery UPS and car battery?