About the safety of lithium-ion batteries

The safety of lithium-ion batteries Any lithium-ion battery, if the product quality is defective, or improper use, there are safety hazards, and may even catch fire. The biggest hidden danger of lithium-ion batteries is that in the case of overcharging, lithium ions accumulate on the negative electrode to form dendrites, puncture the membrane, form an internal short circuit, and a large current occurs, which causes the internal temperature to rise. The gas from the electrolyte raises the internal pressure, causing the leaked liquid to catch fire or expand and explode. Therefore, it is very important to choose a good lithium-ion battery product, and proper consideration of the application can completely eliminate potential safety hazards. It focuses on the analysis of the safety factors of lithium-ion batteries and what problems should be paid attention to when selecting and using lithium-ion batteries. Safety factors: A: The material factors select safe anode, cathode, electrolyte and diaphragm materials, and strictly control the process flow and process parameters. b. Valve When the internal pressure or temperature reaches the preset value, open the explosion-proof valve to release excess gas to ensure safety. c. Protection circuit The protection circuit can effectively prevent overcharge, overdischarge, overcurrent, etc. Reasonable and reliable protection circuits and systems are important guarantees. Note: Choose reliable quality and brand batteries, so that battery materials and technology can be effectively guaranteed. Lithium-ion batteries must be equipped with a protection system. Lithium-ion batteries without a protection system are not allowed. C. Pay attention to the use of lithium-ion batteries, try to stay away from fire sources and high-temperature environments, and try to prevent the system from short-circuiting or overcharging or overdischarging. Misunderstandings and suggestions regarding the use of lithium-ion batteries. Misunderstanding 1: It takes more than 12 hours to charge three times. The lithium-ion battery has been activated before leaving the factory. There is no problem when charging for 12 hours. Both normal use and charging and discharging can be done. Mistake 2: Recharge the lithium-ion battery after it is lit. Do not charge frequently. The charging life is less once to prevent the deep filling of the lithium-ion battery, which will affect the battery life. Try not to let the phone or automatically stop the system. It is suitable for lithium-ion Battery power can help you in your life. The cycle life of a lithium-ion battery refers to the deep cycle life of the filling cycle. Usually a pale imitation does not have much impact on the life of the lithium-ion battery. Misunderstanding 3: When a lithium-ion battery is fully charged, use as little as possible to make the battery more durable. Long-term storage of lithium-ion batteries should not be stored at 100% capacity, so the capacity decays faster. In addition, try not to store it for a long time. After a period of time, the battery should be replenished to prevent over-discharge of the battery, which will seriously affect the service life of the lithium-ion battery. Misunderstanding 4: The larger the charging circuit, the faster the charging speed. Li-ion battery charging is a constant current and constant voltage charging method. Adding a constant current charging current may not necessarily increase the charging speed. In many cases, mobile phones or other systems will do current limit protection. Misunderstanding 5: Unplug the charger after the lithium-ion battery is fully charged. There is a danger of overcharging. The current lithium-ion battery has multiple protections, charging protection, the battery itself will be protected, the protection board will have overload protection, the motherboard has a certain degree of protection, don’t worry about overloading Once complete, the protection board will cut off the circuit and charging will automatically stop. Of course, since there is an opportunity for a current charger, it is helpful to unplug the charger in time to save electricity. 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 functions of the lithium-ion battery management system?