Focus on power battery industry

Focus on power battery industry

  Strictly speaking, there are still conceptual differences between lithium-ion batteries and lithium batteries. " Wang Fang, chief expert in the power battery field of China Automotive Technology Research Center, Secretary General of battery testing and application technology alliance and senior engineer, said that lithium batteries usually refer to batteries with lithium metal or lithium alloy as negative electrode and non-aqueous electrolyte. Lithium ion battery refers to a rechargeable secondary battery. The negative electrode does not use metal lithium, but depends on the movement of lithium ions between the positive and negative electrodes. However, in daily life, people are used to referring to lithium-ion battery as lithium battery or lithium battery for short.

 

  It is understood that at present, most of the new energy vehicles promoted in China (including pure electric vehicles and plug-in hybrid vehicles) use lithium-ion batteries, of which lithium iron phosphate accounts for 80% - 90%. Ternary lithium batteries have also begun to be widely used in passenger vehicles.

 

  In response to the statement that lithium batteries are "highly toxic and dangerous goods" pointed out in the online article, Wang Fang refuted that compared with traditional batteries such as lead-acid, nickel chromium and nickel hydrogen, lithium batteries do not produce any toxic and harmful heavy metal elements and substances such as lead, mercury and cadmium, and the pollution is relatively small. And its electrolyte is organic solvent and lithium salt, most of which are non-toxic or low toxic; However, the decomposition or hydrolysis products of lithium batteries are hydrofluoric acid and other fluorine-containing compounds, which have certain corrosivity and toxicity.

 

  On the "theory of highly toxic lithium battery", Liu Haojie, a researcher level senior engineer of the 18th Research Institute of China Electronics Technology Group, said that the lithium-ion battery itself does not contain highly toxic substances, and the carbon of the negative electrode and the metal oxide of the positive electrode are basically non-toxic. Since lithium-ion batteries belong to a sealed system, they will not be exposed to these substances in normal use. "In any case, its impact is far less than that of the most widely used lead-acid battery."

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