In the essential steps of UPS lithium-ion battery manufacturing, from material selection to post-molding capacity testing, five key issues need attention.
I. Improving the physicochemical structure of the positive and negative electrode active materials is a fundamental step in the lithium-ion battery manufacturing process;
Second, the high adhesion strength of the electrode coating helps reduce the cycle capacity degradation rate, which is the most technically demanding process in lithium-ion battery manufacturing.
III. Optimization of electrolyte composition: The requirements for electrolyte in the production process of UPS lithium-ion batteries are to maintain capacity and extend battery life.
IV. After the battery materials are prepared, the lithium-ion battery production process enters the assembly stage. At this time, it is important to ensure that the negative electrode capacity is slightly larger than the positive electrode capacity.
5. When performing capacity testing, it is advisable to use low-rate charging, generally 0.2C, in accordance with national standards.
The time required for each step in the lithium-ion battery manufacturing process varies. Generally, the processes of material preparation, baking, and formation are the longest, taking anywhere from 10 hours to two days and two nights; other processes are faster, averaging 5 to 6 hours. The entire lithium-ion battery manufacturing process takes approximately 15 days. In general, the following proportions should be emphasized during the manufacturing stage: electrode surface area and electrode compaction density, negative electrode excess rate, formulation process, and the appropriate ratio of electrolyte to positive and negative electrodes.
