Forums > General Discussion > How to improve the explosion of lithium-ion batteries?
| How to improve the explosion of lithium-ion batteries? | |
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| Posted: 28 Jun 2022 02:10 UTC | Post #1 |
| winshinepower Deck & Engine |
Registered Total Posts: 8 |
| The safety of lithium-ion batteries is a complex and comprehensive problem. The biggest hidden danger in the safety of lithium-ion batteries is the random internal short circuit of lithium-ion batteries, resulting in on-site failure and thermal runaway. Therefore, the development and use of materials with high thermal stability is the fundamental way and direction of efforts to improve the safety performance of lithium-ion batteries in the future. Next, we will introduce the explosion-proof measures of lithium-ion batteries in detail. Improving thermal stability of lithium-ion battery materials Cathode materials can improve the thermal stability of cathode materials by optimizing synthesis conditions, improving synthesis methods, and synthesizing materials with good thermal stability; or using composite technology (such as doping technology) and surface coating technology (such as coating technology). The thermal stability of the negative electrode material is related to the type of the negative electrode material, the size of the material particles, and the stability of the SEI film formed by the negative electrode. If the particles are made into a negative electrode according to a certain proportion, the purpose of expanding the contact area between the particles, reducing the electrode impedance, increasing the electrode capacity, and reducing the possibility of active metal lithium precipitation can be achieved. The quality of SEI film formation directly affects lithium-ion batteries' charge-discharge performance and safety. Weak oxidation of the surface of carbon materials, or reduction, doping, surface modification of carbon materials, and the use of spherical or fibrous carbon materials are helpful. Improvement of SEI film quality. The stability of the electrolyte is related to the type of lithium salt and solvent. The use of lithium salts with good thermal stability and solvents with a wide potential stability window can improve the thermal stability of lithium-ion batteries. Adding some high boiling point, high flash point, and non-flammable solvents to the electrolyte can improve the safety of lithium-ion batteries. The type and quantity of conductive agents and binders also affect the thermal stability of lithium-ion batteries. The binder and lithium react at high temperatures to generate a lot of heat. Different binders have different calorific values, and the calorific value of PVDF is almost zero. 2 times of the fluorine binder, and replacing PVDF with a fluorine-free binder can improve the thermal stability of the lithium-ion battery. lithium-io n batteries：https:// www.winshinepower.co m/LFP-12V-30AH-Batte ry.html | |
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