What are the hazards of insufficient electrolyte to the battery?

What is the hazard of insufficient electrolyte to the battery? The amount of electrolyte injected is a little less, a little less, and a little more serious. This is a general statement, and there is no strict requirement. Even with a little less electrolyte, the battery is already defective. A battery with a little less electrolyte is not easy to be found. At this time, the capacity and internal resistance of the battery are normal. There are three methods for testing a battery with a little less electrolyte: battery disassembly, weighing, and testing. Take out the battery: At this time, the fully charged negative electrode is shown in the figure below: Disassembly is a destructive test, and only one cell can be detected at a time. Although the problem can be judged intuitively and accurately, this method is actually used to screen the basically unused units. Weighing: This method has low accuracy, because the pole piece, aluminum plastic film, etc. will also have a weight difference; because the electrolyte is slightly less, the actual liquid retention of each battery will not be very different, so the weight of other materials is very likely More than the weight of the electrolyte. Of course, the problematic cells can be accurately and timely measured liquid injection volume or liquid retention volume of each cell in the liquid injection, but the entire cell rather than the weight, it is best to add the accuracy of the liquid injection equipment and optimize the process to treat Symptoms and root causes. Test: This is the key point of the problem. Which test method can be used to screen out cells with slightly less electrolyte, which is equivalent to the abnormalities of cells with slightly less electrolyte. At present, Wenwu only knows that the capacity can be measured by two methods. The internal resistance is normal, but the electrolyte has slightly fewer cells. Two methods are: cyclic discharge platform and multiplier discharge platform. Cycle can be said to be the ultimate way to test the electrical performance of lithium batteries. There are almost countless types of abnormalities that run through the materials and manufacture of lithium batteries. Most of the final effects are two words: cycle. When the electrolyte is slightly less and the capacity or normal capacity is normal, the capacity will not decrease significantly in the first dozens of cycles; with the increase of electrolyte loss, the number of cycles that can maintain a high retention rate gradually decreases. In other words, the liquid phase of the electrolyte is slightly reduced in the electrolyte, and a large number of cells may be attenuated by tens or even hundreds of times at the normal capacity. The liquid phase of the electrolyte in the electrolyte is slightly less. It can be cycled 10 times or 20 times before it starts to drop significantly. However, according to the normal capacity decay rate before the volume dive, no matter how many times the cells can circulate, the cell capacity will rapidly decay after the dive. During the decay process, the performance of the battery is the charge capacity, but the discharge capacity is low (much like a person with air in and no air out runs out of gas). If the charge and discharge capacity diagram is drawn, the ratio of the two during diving will be significantly higher than 1. After a dive, the battery capacity will not drop to zero immediately, but will remain relatively stable at 20-40% for a period of time. Since then, civil and military have not been measured. The following is the cycle capacity curve and C/D curve of the battery whose capacity is decreased due to insufficient electrolyte. The decrease in cycle performance is the inevitable result of the lack of electrolyte. As long as the amount of electrolyte is sufficient to maintain the number of cycles specified in the cell cycle specification, it can be considered as a cycle. The performance is sufficient. However, the cycle characteristics cannot be used as a way to screen cells with low electrolyte capacity. The reason is simple and it cannot be discussed. The multiplier discharge platform, the platform mentioned here, must be a relatively high multiplier platform, and there is no difference between 0.2c and 0.5c. Compared with the design, the actual average insurance body fluid is 0.002g/mAh and 0.0023g/mAh two 0.5C/3.6V batteries, 1 and 2C/3.4V/3.6 platform capabilities, and the two 0.5C platforms are almost the same , But the capacity of the second group 1 and 2C platform of a large number of electrolytes is less than 8% higher than that of the first group of electrolytes (Wenwu batteries are winding capacity type soft packs, the type ratio or the test rate used for laminated batteries is higher). 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: How to make lithium battery electrode slurry?