What are the common problems of lithium batteries? What to do

1. Overcharge of the battery cell; the charging method of lithium battery is constant current and constant voltage. Once the voltage exceeds the upper limit voltage, the electrolyte inside the battery cell will be analyzed, and gas will swell and catch fire. Generally, lithium manganate, ternary, The upper charge limit voltage of lithium cobalt oxide is controlled at 4.2V, and the upper limit voltage of lithium iron is controlled at 3.65V. 2. Internal and external short circuit of the battery cell; internal short circuit of the battery cell: metal particles (impurities), pole piece burrs, pole piece dislocation, cell collision and deformation, external high temperature, diaphragm quality problems, lithium dendrite generation and puncture Diaphragm, etc.; external short circuit: short circuit of external wiring of the battery, short circuit of BMS component failure, etc. (In the event of an external short-circuit, due to the low external load, the battery instantly discharges with a large current. A large amount of energy is consumed on the internal resistance and huge heat appears.) 3. The battery is impacted or punctured by an external force; 4. The water control in the manufacturing process is not in place, Cause the battery to swell and burst. Regarding safety issues, Riyuetan batteries provide the following solutions: 1. Overcharge problem: install a protection board on the lithium battery to deal with overcharge and overdischarge; 2. Internal short circuit: use a dust-free workshop to control impurities, and employees should protect personnel and on-site 5S; guard against bumps in the handling process; enhance the life control of tools and molds; adopt high-strength diaphragms; 3. external short circuit: install a fuse on the battery pack; train well to guard against misoperation of personnel; 4. battery is impacted by external forces Or puncture: add a high-strength outer shell to the battery pack; use a flame-retardant electrolyte and a high-strength diaphragm. 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.