How to judge the quality of lithium iron phosphate battery pack?

Consistency: If a lithium iron phosphate battery pack with poor consistency has a protective plate, its capacity will be the lowest based on the bucket principle, so that the entire battery pack will not be able to fully release electrical energy due to one cell. Can not fully absorb electric 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. Self-discharge rate: Since lithium iron phosphate battery packs are often used for power lithium batteries, the power consumption is large, which requires that the battery pack self-discharge rate should be less than 2% per month. To achieve this, the above-mentioned consistency requirements must be 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. High rate: A battery pack that can withstand high rate charge and discharge has a strong ability to charge and discharge quickly. For lithium iron phosphate battery packs, they must be able to charge and discharge quickly to meet their requirements for power lithium batteries. 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. Long life: As a general requirement, lithium iron phosphate battery packs have 85% capacity after 2000 discharges at 1C, and 80% capacity after 3000 discharges. Of course, due to the different level of craftsmanship and materials, the standards formulated by each processing manufacturer are different. Statement: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous one: Lithium battery bulge is important What repair method?