Analyses the production technology of lithium-ion batteries

Source: 2020 - 03 - 23 gilonite hits: first lithium battery production technology of lithium battery is a kind of anode materials for lithium metal or lithium alloy, using nonaqueous electrolyte solution of the battery, rechargeable battery and lithium ion battery and lithium ion polymer battery is not the same. The inventor of the lithium battery is Thomas Edison. Because the metal lithium has very active chemical properties, processing, preservation and application of metallic lithium has high environmental requirements. As a result, the lithium battery haven't in use. With the development of microelectronics technology in the late 20th century, the miniaturization of equipment level is higher and higher, more and more is also high to the requirement of power supply. Lithium battery and entered the practical stage of mass. Do you want to know more information about the lithium battery? The following xiinji. net author will introduce one by one to you: lithium-ion battery production technology, good defects, classification, the correct use, maintenance, generally the difference between the lithium battery and power lithium batteries, brand recommended, choose and buy. For those who want to learn the basic knowledge of, please see the list below. Production technology of lithium battery production process and control: raw data raw data test raw data pretreatment & rarr; → → → → Batch check vacuum induction smelting & rarr; Rapid cooling ingot & rarr; Check the semi-finished products heat treatment & rarr; → Broken & rarr; Coarse powder production & rarr; Testing & rarr; Post-processing & rarr; The vacuum or nitrogen filled packaging & rarr; The finished product & rarr; Inspection of the product. I practice: 1. Technical requirements: supplier to provide material list, QC department for testing. If the raw material and the impurities in accordance with technological requirements, should carry on the processing and storage. 2. Material pretreatment mainly eliminate pollutants and oxide layer on the surface of the original data, to ensure that the original data cleaning. 3, according to different conditions make up some volatile elements such as the loss of rare earth, manganese, etc. 4. Vacuum induction melting is argon in 0. 1 pa under the vacuum degree of filling the, all the composition of the metal melting into alloy under 1300 ℃, and then rapidly cooling casting ingot casting, alloy grain fine, evenly aligned. Ii. Semi-finished products, semi-finished products inspection has three aspects: 1. Appearance: alloy should be metallic luster appearance, no obvious oxidation discoloration, alloy structure should be uniform fine, no loose and impurities. 2. Chemical composition: the chemical composition of alloy should be consistent with the design elements; 3. Electrochemical capacity: must conform to the requirements of the enterprise specification, otherwise can't transfer downward. Iii. Heat treatment: select vacuum heat treatment furnace, vacuum fill argon again after maintenance. Heat treatment process is mainly on the product uniformity and stabilization ( Stress relief) , to ensure the platform of alloy pressure level and good uniformity, good cycle life. Key guarantee temperature and vacuum degree, oxygen content measurement. Fourth, argon gas under maintenance, alloy crushing, milling, fully closed, the packaging process ensure alloy oxygen content is extremely low. Finished goods inspection has four aspects: 1. Appearance: no discoloration, oxidation, agglomeration phenomenon 2. Physical properties, particle size distribution, apparent than in accordance with the enterprise standard; 3. Chemical properties: alloy powder of compositions, impurity content and PCT curve conforms to the enterprise standard; 4. The electrochemical capacity, charge and discharge characteristics of electrochemical function:, cycle life, large current pulse discharge characteristic and temperature characteristic. Products using nylon composite plastic vacuum double packaging, packaging the whole case after filling nitrogen in a plastic bag packing. Carton is carton.