Temperature analysis of low temperature performance of 18650 lithium ion battery

1. Storage temperature. When the ambient temperature is 70°C±2°C and stored for 48 hours, the lithium-ion battery pack will not be bloated, deformed, or damaged; when it is restored to a normal temperature environment, the lithium-ion battery cell can meet the specified charge and discharge requirements. When the ambient temperature is -55℃±2℃, the lithium-ion battery pack will not be deformed or damaged when stored for 48 hours; when it is restored to the normal temperature environment, the lithium-ion battery can meet the specified charge and discharge requirements. After testing the low temperature performance of 18650 lithium ion battery low temperature 18650 battery cell 2, working environment temperature. Low temperature performance of 18650 lithium ion battery requires charging temperature: 0℃～+40℃; discharging temperature: -40℃～+55℃ (above 0℃ can be discharged according to specified requirements; when -40℃～0℃, external heating unit can be used (Heating film) Heat the lithium-ion battery pack to above 0°C to make the single lithium-ion battery reach the discharge temperature requirement). 3. High altitude (low air pressure). The low temperature performance of 18650 lithium ion battery must be able to meet the normal charging at an altitude of 5000 meters or more, and can be discharged in accordance with the specified discharge requirements. During charging and discharging, the lithium ion battery cell should not be bloated, deformed, or damaged. This test is also 18650 The extensive use of lithium-ion battery applications has laid a solid foundation. 4. Impact analysis on safety characteristics of low-temperature lithium-ion batteries. The fully charged low-temperature 18650 lithium-ion battery is rigidly fixed on the impact test bench with an impact acceleration of 392m/S. Disclaimer: Some pictures and content of the articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: Analysis of the type of surface treatment process for the aluminum shell of the power lithium battery