CMB’s Reliable Battery Technology for Low Temperatures: -5°C to -50°C

Charging and discharging standard lithium batteries at extremely low temperatures (below 0°C/32°F) can result in lithium precipitation that can ultimately lead to battery pack fires or explosions. However, lithium battery packs that are specially designed for low temperature operation not only prevent dangerous situations from occurring, they also improve overall battery pack performance and reliability in cold temperatures.

These specially customized battery packs are often used in commercial and industrial equipment, robotics, and marine monitoring systems that require charging and discharging in temperatures ranging from -5°C to -50°C (23°F to -58°F).

CMB’s battery packs that operate properly in low temperatures are equipped with special low temperature cells, insulation, heat storage technology, and heating pads. These features allow these battery packs to operate at an optimal temperature despite low temperature environmental surroundings, resulting in an improved and more reliable performance.

CMB utilizes the latest technology when it comes to our battery packs for cold temperatures, but it’s important to clarify the unique specifications of your application and its environment with our team during the design phase to ensure we can equip your low-temperature battery pack with the most ideal features for your situation.

Let’s Create Your Custom Battery Pack

The Important Factors in Designing Low Temperature Resistant Battery Packs

One factor that is influential when designing a battery pack for operation at low temperatures is the duration of time the pack will need to operate for. As the table below demonstrates, the types of battery cells and heating technology we choose from differ between battery packs that need to operate for 4 hours or longer at a time versus battery packs that need to operate for short or intermittent periods of time.

Low Temperature Environment Duration Cell Options Battery Pack Technology
More than 4 hours Low temperature cell Insulation and heat storage technology or heating pads
Intermittent or short periods of time Low temperature cell or standard cell Insulation and heat storage technology
Design low-temperature batteries

Other factors that influence the design, materials, and technology incorporated into each custom battery pack for low temperature include: the temperature range of the surrounding environment, space restrictions, performance requirements, and budgetary considerations.

Low Temperature Cell Specifications

At the heart of CMB’s customized battery packs that operate at low temperatures are specially crafted low-temperature cells. For each low temperature battery pack we design, we choose from three primary low temperature battery cells, all of which are detailed in the tables below.

Low Temperature 3.2V 18650 1600mAh LiFePO4 Cell Specifications

Dimensions Diameter 18.3±0.2 (mm)
Height 65.20±0.30 (mm)
Capacity 1600mAh  
Typical Voltage 1550mAh 0.5C discharge
Working Voltage 2.0V to 3.65V  
Maximum Continuous Charge/Discharge 1.6A/4.8A  
Cycle Life (25℃) 7000 times(50% DOD)
4000 times(80% DOD) The residual capacity is no less than 80% of rated capacity at 1C rate.
3500 times(100% DOD) The residual capacity is no less than 80% of rated capacity at .0.5C/1C rate.
2000 times(100% DOD)  The residual capacity is no less than 80% of rated capacity at 1C rate.
Working Temperature Range Charge 0℃ to 60℃ Discharge -30℃ to 65℃

Low Temperature 3.2V 26650 3200mAh LiFePO4 Cell Specifications

Dimensions Diameter 26.3 ± 0.2(mm)
Height 65.7 ± 0.2 (mm)
Capacity 3200mAh  
Typical Voltage 3150mAh 0.5C discharge
Working Voltage 2.0V to 3.65V  
Maximum Continuous Charge/Discharge 9.6A/16A
Cycle Life (25℃) Discharge capability of 2001 cycles ≥80% Original discharge capacity
Working Temperature Range Charge -30℃ to 60℃
Discharge -50℃ to 60℃
Temperature Discharge Performance Discharge capability at −40℃ ≥90%
Discharge capability at 25℃
Discharge Rate Capability Discharge capability at 3C ≥96%
Discharge capability at 0.2C

Low Temperature 3.7V 18650 2500mAh NCM Cell Specifications

Dimensions Diameter ≤ 18.50 mm
Height ≤ 65.30 mm
Capacity 2500mAh  
Typical Voltage 2450mAh 0.5C discharge
Working Voltage 2.75V to 4.2V  
Maximum Continuous Charge/Discharge 2.5A/25A
Cycle Life (25℃) 2.5A charge/ 10A discharge ≥500 cycles
Working Temperature Range Charge 0℃ to 45℃
Discharge -40℃ to 75℃
Temperature Discharge Performance Discharge capacity ≥80% Rated capacity at-20℃
Discharge capacity ≥70% Rated capacity at-30℃
Discharge capacity ≥60% Rated capacity at-40℃

Start Customizing Your Battery Pack Today!

CMB has crafted hundreds of custom low temperature battery pack solutions for commercial and industrial applications. For each unique application, we carefully select the most ideal battery cells and accompanying battery pack technology to ensure the best performance in low temperatures.