Cause analysis of common battery processing problems

A. Less supplementary materials; b. The amount of material attached to both sides of the pole piece is quite different; c. The pole piece is broken; d. Electrolyte is low; e. Electrolyte conductivity is low; f. The positive and negative matching parts are not well matched ; G. Diaphragm porosity is small; h. Adhesive aging accessories fall off; 1. The winding iron core is too thick (not dried or not penetrated by the electrolyte). j. The sub-volume is not fully charged; k. The specific capacity of the positive and negative materials is small. 2. Reasons for high/unstable battery internal resistance: A. Welding of the negative electrode plate and the lugs; b. Virtual welding between the positive electrode plate and the tabs; c. Virtual welding between the positive electrode lugs and the cap; d. Negative electrode The virtual welding between the tab and the shell; e. The internal resistance of the contact between the rivet and the pressure plate is large. f. The positive electrode is not added with a conductive agent; the electrolyte has no lithium salt; h. The battery has been short-circuited; 1. 3. Reasons for low battery voltage: A. Side reactions (electrolyte decomposition; impurities in the anode; water); b. Poor molding (SEI film molding is not safe); c. Customer circuit board leakage (refers to the customer’s handling and sending back的 battery core); d. The customer did not meet the requirement of spot welding (after the battery is processed by the customer); e. Burr; f. Micro short circuit; Dendrites appear in the negative electrode. 4. The reasons for the super thick and thick battery are as follows: A. Weld leakage; b. Electrolyte decomposition; c. Undried moisture; d. Poor sealing performance of the bottle cap; e. The shell wall is too thick; f. The shell is too thick; g. The winding core is too thick (too many accessories; uncompressed pole pieces; too thick diaphragm). 5. Battery explosion A. There is a problem with the compartmentalization cabinet (resulting in excessive charges); b. The diaphragm closing effect is poor; internal short circuit 6. Short circuit A. Material dust; b. Shattered and broken; c. Scraper (small diaphragm paper is too small or The pad is not good); d. Uneven winding; e. Unpackaged; f. Diaphragm has holes; g. Burrs 7. Open circuit a) The lugs and rivets are poorly welded, or the effective solder joint area is small; b) Connection Pieces are broken (connecting pieces are too short or welding with spot welding pole pieces is too low) statement: The articles published on this website are all from the Internet. If there is any infringement, please contact to delete it. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it. Previous: Why do most mobile phones now have non-removable batteries?