BHL18650-2500-ULT Ultra-Low Temperature Lithium-Ion Cell | Features & Applications
Ⅰ. Core Product Advantages
1. 极致耐低温，-80℃稳定放电
Operating temperature limits: charging 0℃~40℃, discharging -80℃~55℃.
The cell retains ≥95% capacity at 55℃ high temperature, delivers full rated capacity at room temperature and maintains 95% capacity at 0℃, while keeping no less than 80% capacity under -80℃ extreme cold conditions with a low-temperature discharge cut-off voltage of 2.5℃. Adopting exclusive low-temperature electrolyte formula, it requires no external heating modules, greatly reducing thermal management costs for polar unmanned equipment and perfectly adapting to devices operating at -70℃~-80℃ ultra-low temperatures.
2. Stable Cycle Performance & Low Self-Discharge for Low-Maintenance Field Operation
The cell maintains over 80% rated capacity after 1000 charge-discharge cycles under standard working conditions, and retains ≥85% residual capacity after 30-day full-charge static storage at room temperature with ultra-low self-discharge rate. For long-term storage, a state of charge of 10%~35% is recommended. When stored in dry environments at -20℃~45℃, only seasonal supplementary charging is required. It is highly suitable for long-term shelved equipment in border and polar regions and effectively reduces manual maintenance frequency.
3. Full-Range Safety Certification with Zero Thermal Runaway at All Temperatures
The cell has passed full-scale safety tests including overcharge, deep overdischarge, short circuit, 135℃ thermal shock, high-low temperature alternation, three-axis vibration and six-direction drop, with zero fire or explosion throughout all tests. The integrated steel shell provides excellent extrusion and impact resistance. The cell surface temperature is controlled below 60℃ during charging and ≤70℃ during discharge. Matched with a dedicated protection board, it achieves triple protection against overcharge, overdischarge and overcurrent, fully meeting military-grade and polar high-standard safety requirements.
4. Superior Weather Resistance & Aging Resistance for Harsh Cold-Region Conditions
After 10~55Hz three-axis swept vibration, 1-meter six-direction drop and long-term damp-heat testing at 40℃ & 95% RH, the cell presents no deformation or liquid leakage and retains over 95% capacity. The customized purple low-temperature sleeve film features UV resistance, moisture-proof and anti-freezing performance. Cells in the same pack feature voltage difference ≤20mV and internal resistance difference ≤6mΩ, with internal pack temperature deviation ≤5℃, eliminating local capacity attenuation in extreme cold environments.
5. Standard Universal Specification for Efficient Bulk PACK Assembly
Adopting universal standard 18650 dimensions, the cell is packaged with 100 pieces per inner box and 200 pieces per outer box with shockproof and anti-collision protection for safe transportation. Only resistance welding and laser welding are permitted, while tin welding is prohibited. No rigid limit exists for series-parallel configuration, and fuses can be added for series circuits. The battery pack supports waterproof and anti-static structural design. Slight liquid leakage will not erode the protection circuit board. Custom molds are not required, enabling rapid mass production for equipment manufacturers.
Ⅱ. Industry Application Scenarios
Polar / Border Individual Emergency Equipment：Ideal for extreme-cold rescue lighting, border individual power supplies and low-temperature emergency starting devices. Supported by reliable -80℃ ultra-low-temperature discharge capability, it delivers stable power output in severe freezing environments and provides high instantaneous current for equipment startup, perfectly adapting to long-term field duty missions.
High-Latitude Cold-Region IoT Monitoring：Applicable to polar scientific research instruments, northern field weather stations, pipeline low-temperature inspection recorders and cold storage sensing equipment. Featuring low self-discharge, vibration resistance and damp-heat resistance, it ensures stable operation all year round under drastic temperature differences.
Cold-Region Surveying Drones & Special Communication Devices：Suitable for low-temperature surveying aircraft, Beidou positioning terminals and outdoor radio stations. 3C high-power discharge guarantees stable takeoff and signal transmission performance. The lightweight cell reduces overall equipment weight and avoids unexpected power-off in ultra-low-temperature environments.
Northern Industrial Low-Temperature Energy Storage Equipment：Widely used for cold-region base station backup power, low-temperature underground detection instruments, cold chain AGVs and low-temperature power tools. Multi-layer safety protection eliminates industrial fire risks, and 1000-cycle long lifespan adapts to high-frequency start-stop working conditions.
Extreme-Cold Outdoor Portable Energy Storage：Perfect for winter RV parking power, extreme cold camping energy storage and vehicle-mounted emergency starting power supplies. The universal 18650 modular design ensures stable power supply during static storage and driving under both high and low temperature conditions.
Ⅲ. Product Summary
The BHL18650-2500-ULT features core competitiveness of -80℃ ultra-extreme low-temperature discharge, together with five key advantages: 3C high-power output, 1000-cycle long lifespan, full-range safety protection, superior low-temperature weather resistance and universal standardized dimensions. Custom-developed for industrial special equipment operating in polar and high-latitude extreme cold regions, it is equipped with complete charge-discharge specifications, professional PACK assembly guidelines and standardized warranty system, serving as the premium cell solution for ultra-low-temperature special lithium power supply systems.
