Quick Answer
EXTREME COLD CAN SIGNIFICANTLY AFFECT THE PERFORMANCE AND LIFE OF LITHIUM-ION CELLS, CAUSING CAPACITY LOSS, INCREASED SELF-DISCHARGE, AND EVEN COMPLETE FAILURE IF TEMPERATURES DIP BELOW -20 DEGREES CELSIUS. THIS IS DUE TO THE DECREASED ELECTROCHEMICAL ACTIVITY AND INCREASED INTERNAL RESISTANCE. PREVENTATIVE MEASURES ARE NECESSARY TO MITIGATE THESE EFFECTS.
Lithium-Ion Cell Behavior at Low Temperatures
When lithium-ion cells are exposed to extreme cold, their internal chemistry slows down, leading to reduced capacity and increased self-discharge. This is because the electrolyte in the cell becomes less conductive, hindering the flow of ions between the electrodes. As a result, the cell’s ability to discharge and charge is impaired.
Temperature Thresholds and Precautions
Typically, lithium-ion cells start to experience significant capacity loss and increased self-discharge when temperatures drop below -10°C (14°F). To prevent damage, it is essential to store lithium-ion batteries in a warm, dry environment, ideally between 10°C to 20°C (50°F to 68°F). It is also recommended to keep the battery away from metal objects and to avoid deep discharging when the temperature is low.
Protecting Lithium-Ion Cells from Extreme Cold
To protect lithium-ion cells from extreme cold, consider the following techniques: insulate the battery pack to maintain a stable temperature, use a battery warmer or heating pad to keep the battery at a moderate temperature, and avoid exposing the battery to sudden changes in temperature. Additionally, consider using cells with a lower temperature coefficient or specialized cold-weather batteries designed for extreme temperature applications.
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