Eight Principles of Lithium Battery Pack Technology

Eight principles of lithium battery pack technology 1. Lithium battery pack capacity consistency principle 1C current constant current charge to 3.65v, 3.65v constant voltage charge, the current drops to 0.03cs to stop. Use 1C current for discharge until the end voltage of discharge is 2.0v, and the discharge should not be less than 95% of the rated capacity. Eight Principles of Lithium Battery Pack Technology 2. Principle of Lithium Battery Pack Constant Current Ratio When the current drops to 0.03c, the ratio of constant current charging to the total charging is not less than 93%. 3. The lithium battery pack discharge platform requires that after the battery is fully charged, it should be continuously discharged to 2.0v with a current of 1C, and the time from the voltage to 3.1v is recorded. The unloading platform shall not be less than 48 minutes 4. The self-discharge of the lithium battery pack requires full power storage at 55℃r2℃ for 7 days. Store at full power at 25±5℃ for 28 days. 45℃±2℃ without charging for 10 days, test voltage. Test the voltage without charging for 30 days at 5°C at 25°C. The retention rate of fees is not less than 95%. The open circuit voltage is not less than 2.8v. 5. Lithium battery pack resistance requirements: the battery resistance error is less than 5m; 6. The voltage difference between the lithium battery packs is less than 5mV; 7. The higher the consistency between the lithium battery packs, the better; 8. The lithium battery pack Battery cycle life (1) The same batch of materials, the same process, the same equipment, and the same type of battery processed at the same time can be assembled into the same battery pack. 45. 1C charge and discharge in a 2℃ environment in the soil, after 200 cycles, not less than 95% of the initial 1C5 capacity. The quality department randomly inspects 5 samples in each batch for testing as a basis for matching. 2℃1C charge and discharge, after 300 cycles, no lower than initial 1C; 95% capacity. The grouping principle of lithium battery packs is to assemble batteries with the same files. When the number of batteries of this level in the same batch is insufficient, batteries with the same file voltage and file capacity in adjacent batches will be used to make up for the shortage. It is prohibited to use batteries with different voltages and different internal resistance levels to pack the same battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Explain the choice of battery shell parts