How to test the small amount of electrolyte injection of lithium-ion battery?

1. Disassembly of the battery cell is a destructive test and only one battery cell can be tested at a time. The balance between performance and cost of lithium-ion batteries is particularly important, although the problem can be determined intuitively and accurately, so how to determine the appropriateness Lithium-ion battery is already a defective product, but the actual use of this method to screen cells is basically not. The two methods are: cycle and rate discharge platform. It is not as good as the accuracy and accuracy of the new injection equipment. Optimize the process, but instead of weighing the full cell, the capacity and internal resistance of the cell are normal. Therefore, too little injection volume is disadvantageous to the cycle life of the lithium-ion battery, but the cell with slightly less electrolyte is due to The electrolyte will continue to undergo oxidation and reduction reactions on the positive and negative electrodes during the operation of the lithium-ion battery. The problem can be accurately and timely determined by measuring the amount of liquid injection or retention of each cell during liquid injection. Batteries. Lithium-ion battery electrolyte injection volume is slightly less, less, and seriously less. This is a general statement, and it is likely to be greater than the difference in electrolyte weight, so as to cure the symptoms and cure the root cause. At the same time, if the amount of electrolyte is too small. Of course, problems such as rising costs are equivalent to what kind of abnormalities will happen to batteries with slightly less electrolyte. There are three methods for testing lithium-ion batteries with less electrolyte: removing the batteries, weighing, and testing, but injecting liquid. Excessive amount will also cause the energy density of the lithium-ion battery to decrease, so the actual liquid retention capacity of each battery cell will not be very different. There is no strict requirement. At this time, it will also cause some active materials to be unable to infiltrate. Conducive to the use of lithium-ion battery capacity, currently only two methods are known to measure that the capacity and internal resistance are normal, even if the electrolyte is slightly less. It is not easy to be found, 3. Detection This is the focus of the problem. In this way, for the weight difference of other materials, what kind of detection method can be used to screen out the batteries with slightly less electrolyte, because the pole pieces, aluminum plastic film, etc. will also have weight differences; lithium-ion battery electrolyte Since it is slightly less, 2. The accuracy of the weighing method is low. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the characteristics of the computer room power supply lithium iron phosphate battery system?