How to distinguish and differentiate lithium iron phosphate battery pack is good or bad? How to judge the quality of lithium battery pack combination? Recently, a lot of people are asking questions, it seems that how to test the lithium battery pack is a matter of concern to everyone.
After the weekend two days of finishing, small series to give the following suggestions, I hope you have help, the content is not complete, for reference only.
How to detect and distinguish the lithium iron Phosphate battery pack is good or bad?
1. Consistency Poor consistency of lithium battery pack if there is a protective plate, according to the bucket principle, its capacity will be the lowest, so that the entire battery pack will be due to an electric core for the reasons can not fully release electricity, nor fully absorb electricity, over time, the life of the battery pack is short.
If the battery pack does not have a protective plate, there will be no loss of capacity, there may be a safety problem with overheating and explosion.
Test consistency method is: the need to test the batteries in series, 4 a group or 6 a group, do 1C charge and 3C discharge, in its charge and discharge process, look at the voltage fluctuation of the cell line.
2. Self-discharge rate
Because lithium iron phosphate battery pack power consumption, which requires that the battery pack self-discharge rate should be less than 2% per month, to do this, the consistency of the above requirements are necessary, in conformance testing, the self-discharge rate detection method is: the capacity of the same battery after filling for one months, and then measuring its capacitance value.
3. High magnification rate
Can withstand high-rate charge and discharge of the battery pack, its rapid charge and discharge capacity is strong, for lithium iron phosphate battery, must be able to quickly charge and discharge to meet its requirements for lithium batteries. The test method for high magnification is: according to the conditions provided by the lithium battery ups manufacturers to use the highest rate test, such as in the charge and discharge process has obvious fever serious problem, then the quality of the battery is not good.
In general, the power Lithium battery pack should meet the safety requirements of 3C charging and 30C discharge. 4. Long life: As a general requirement, lithium iron Phosphate battery pack has a capacity of 85% after discharging 2000 times in 1C, and 80% after 3,000 times.
Of course, each manufacturer has different standards because of the process level and material.
The test method is based on the data provided by the manufacturer in theory, whether the data provided by the manufacturer is true, the brand effect can only be seen at present, which depends on which brand the consumer believes.
How to distinguish the lithium battery pack good or bad?
The higher the charge/discharge ratio, the better.
The more times the charge and discharge cycle, the better.
The smaller the resistance, the better, this parameter with the load weight, temperature and other factors change at any time, with the battery life is reduced, the internal resistance is gradually increasing.
Battery consistency using the same material, the same process of production of batteries in capacity, internal resistance, charge and discharge curve of the higher the better. Lithium iron Phosphate battery pack is being used more and more widely because of its high security, especially used in UPS lithium battery has huge development space.
With the continuous progress of science and technology, people's attention to environmental protection, the traditional lead-acid battery has gradually faded out of the eyes of people, lithium battery pack will become a better choice for people. Recently intends to start lithium iron phosphate battery you, you can be optimistic about these points oh, how do you detect and differentiate lithium iron phosphate battery pack I believe it is a great help.
