It is not recommended to directly charge common lithium batteries in sub-zero environments.
In a cold environment below 0℃, lithium battery electrolyte viscosity rises and the conductivity decreases, resulting in a decrease in the movement of lithium ions.
Charging will cause lithium ions to gather together at the negative electrode (anode), which will lead to lithium-ion metallization at the negative electrode, we call it “plating”. This results in less active lithium ions in the battery, and thus less available capacity. In more severe cases, it may cause the lithium metal to pierce the separator and short-circuit the battery internally.
In the battery working conditions, such as outdoor or no temperature-controlled room, there are still the demands of charging below 0℃. Therefore, the following types of low-temperature lithium batteries could be useful in the conditions below 0℃.
Self-Heating Battery
Self-heating battery uses an internal temperature control system and a self-heating pad to adjust the temperature. When the temperature falls below 0℃( can be set ), the battery system enables the heater to start working and bring the temperature back above 5℃ to reach the required temperature for charging.
This solution has little increase in cost, is ideal for temperatures around -10℃.
Low-Temperature Lithium Iron Phosphate Battery
Low temperature discharge battery
- Charging temperature: 0℃ ~ +45℃
- Discharge temperature: -50℃ ~ +60℃
- -50℃ 0.2C discharge capacity≥70%
- -40℃ 0.2C discharge capacity≥80%
Low temperature charge & discharge battery
- Charging temperature: -20℃ ~ +55℃
- Discharge temperature: -40℃ ~ +60℃
- -40℃ 0.2C discharge capacity≥80%
Based on the particular electrolyte and electrode film, this type of battery can be charged and discharged at -20℃ without heating.
85% of the effective capacity is guaranteed, cycle life reaches more than 300 cycles under low-temperature conditions.
Applications: Military Communication, Aerospace, Polar Research, Cryo Rescue, Electric Communication, Railroad, Ship, Robotics, etc.
Low-Temperature Lithium Polymer Battery
- Charging temperature: -30℃ ~ +50℃
- Discharge temperature: -50℃ ~ +50℃
- Minimum discharge at -50℃ at 0.2C with over 60% efficiency
- Discharge at 0.2C in -40℃ environment with 80% discharge capacity.
- Excellent low temperature cycle performance, charge and discharge at 0.5C in -30℃ environment, capacity maintained at 85% or more after 300 cycles
Low-Temperature Lithium Cobalt Battery
- Charging temperature: -20℃ ~ +50℃
- Discharge temperature: -40℃ ~ +50℃
