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Lithium-ion batteries are classified according to cathode materials, including lithium cobalt oxide batteries, lithium manganate batteries, nickel-cobalt-manganese ternary lithium batteries, lithium iron phosphate batteries, etc. At present, lithium iron phosphate batteries are most commonly used in energy storage stations. A few countries use nickel-cobalt-manganese ternary lithium batteries. Commonly used power batteries are mainly nickel-cobalt-manganese ternary lithium batteries and lithium iron phosphate batteries.
The structure of a lithium-ion battery generally consists of a positive electrode, a negative electrode, a separator and an electrolyte. In addition, the battery also includes components such as binders, conductive agents, current collectors and packaging materials. Materials such as lithium-ion battery separators and electrolytes are flammable or combustible materials that are easily decomposed by heat, and the gas products produced are easy to burn, leading to thermal runaway.
With the development of electric vehicles, people have higher and higher requirements for the cruising range of electric vehicles and require faster and faster charging of batteries. This increases the active material content and activity in the battery, and also increases the performance of lithium-ion batteries in disguise. Fire risk; Increased battery energy density also increases the potential for lithium-ion batteries to release energy.