What are the details of the method for detecting the thickness of the lithium-ion battery barrier?

As one of the four major raw materials for lithium batteries, barriers play a pivotal role in the safety, cycle life, discharge rate and other functions of lithium-ion batteries. However, its high skill threshold has discouraged many investors. Even though the barriers to lithium-ion batteries have been localized at this moment, there are still many technical barriers to be overcome. For example: At present, almost all the barrier thickness measurement equipment in China only has the test results, and rarely can the closed-loop system of barrier thickness be achieved. The uniformity of the thickness of the lithium ion battery includes the uniformity of the longitudinal thickness and the uniformity of the lateral thickness, but in comparison, the uniformity of the lateral thickness is more important, and generally must be controlled within 1um. 1. A single X-ray ensures the accuracy of the online inspection of the barrier thickness. The reason for the online inspection of the barrier thickness is to convert the attenuation of the ray through the barrier into the barrier thickness. This means that the accuracy and invariance of the detection must be guaranteed during the detection process. Second, the online control technology of barrier thickness There are two important online control skills of lithium-ion battery barrier thickness, one is MD (longitudinal) control and CD (lateral) control; the other is the online machine visual inspection of barriers. 1) MD control and CD control The so-called MD control and CD control refer to the thickness closed-loop system of MD bias by controlling the feeding screw speed or traction speed; and the data measurement through the scanning frame, and finally the data closed-loop system of CD bias is realized. . One of the key skills is the CD banner alignment skills, that is, the inspection data of the scanning frame must be accurately aligned with the position of the full-frame die. In addition, the shrinkage factor of the film must be considered. Only the alignment can be air controlled. Good. 2) Gap online machine visual inspection skills. According to the knowledge, the key to the inside of the lithium-ion battery is the pinhole recognition. For the gap detection, Cun Energy has launched the pinhole recognition technology, which is to use multi-channel imaging exposure to distinguish different pinholes and bright spots. Skills. In addition to pinhole recognition, there are other intelligent classification results, that is, intelligent classification algorithms. 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: What are the important maintenance methods for lithium iron phosphate battery packs?