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The power recovery decision-making consultation salon co sponsored by the Beijing Association for Science and Technology and the Literature and Information Center of the Chinese Academy of Sciences was held in Beijing Green Space Center yesterday. Fei Weiyang, academician of the Chinese Academy of Sciences, pointed out that in recent years, the key technology of pure electric drive has made great progress, and the core technology of electric vehicles represented by lithium ion has made a major breakthrough. However, the massive application of lithium batteries will also lead to the retirement of a large number of lithium batteries. Therefore, it is necessary to strengthen the research and development of advanced technologies for lithium battery recycling to achieve safe and efficient disassembly and overall recovery of valuable metals and prevent secondary pollution.

The service life of lithium battery is an index that must be paid attention to in the use of lithium ion battery. Generally speaking, the service life of lithium ion battery is mainly affected by two factors: 1) service time; 2) Number of cycles.

In the national compulsory standards (referred to as new national standard for electric vehicles), in addition to the speed, weight, motor power, pedaling function, body size and materials in the country's new national standards) That is the standard voltage of the battery, which stipulates that the battery voltage must not be higher than 48V. In other words, the pure electric battery life under the new country is also limited.

At present, power battery mainly includes lithium iron phosphate battery, lithium manganate battery and lithium ternary battery. And lithium iron phosphate battery supports half of China's lithium ion battery material industry. What is the working principle of lithium iron phosphate battery?