BHL18650-4000 Low-Temperature Lithium-Ion Cell | Features & Applications
Ⅰ. Core Product Advantages
1. Stable Discharge at -40℃ with Balanced All-Season Performance
Operating temperature range: charging 0℃~40℃, discharging -40℃~55℃.
The cell retains ≥95% capacity at 55℃ high temperature, delivers 100% full capacity at 25℃ room temperature and maintains 95% capacity at 0℃, while reserving over 80% capacity under -40℃ extreme cold conditions with a low-temperature discharge cut-off voltage of 2.3V. No additional heating modules are required, enabling direct operation of outdoor winter equipment and cold storage devices in northern regions and significantly reducing overall thermal structural costs.
2. 4000mAh Ultra-Large Capacity & 3C Continuous High-Power Output
The 4000mAh ultra-high capacity greatly extends single-operation endurance of devices. It supports standard 3C discharge with a maximum continuous discharge current of 16A, fully meeting the instantaneous high-power startup demands of power tools and portable energy storage equipment. With excellent heat generation control, the cell surface temperature stays below 60℃ during charging and ≤70℃ during discharge, effectively avoiding accelerated aging under long-term high-power operation.
3. Excellent Cycle Stability & Low Self-Discharge for Low-Maintenance Standby Use
The cell features outstanding cycle life 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 10%~35% state of charge is recommended. When stored in dry environments at -20℃~45℃, only simple supplementary charging is required after 12 months. It is ideal for unattended field equipment and intermittently operated industrial devices, lowering inspection and replacement frequency.
4. Full-Range Strict Safety Tests with Zero Thermal Runaway in Harsh Conditions
The cell has passed comprehensive safety verification including overcharge, deep overdischarge, external short circuit, 135℃ thermal shock, high-low temperature cycling, three-axis swept vibration and six-direction drop, with zero fire or explosion throughout all tests. The integrated steel shell provides superior extrusion and impact resistance. Matched with a dedicated protection board, it achieves triple protection against overcharge, overdischarge and overcurrent, complying with safety standards for industrial and outdoor equipment.
5. Superior Weather Resistance & Efficient Standardized Bulk PACK Assembly
After 10~55Hz three-axis vibration, 40℃/95% RH long-term damp-heat and 1-meter drop tests, the cell shows no deformation or liquid leakage and retains over 95% capacity. Cells from the same batch feature voltage difference ≤20mV, minor internal resistance deviation and internal PACK temperature difference ≤5℃. Adopting universal 18650 specifications with 100-piece shockproof inner box packaging, the cell supports only resistance welding and laser welding. Flexible series-parallel configuration requires no customized molds, enabling rapid mass production for manufacturers.
Ⅱ. Industry Application Scenarios
High-Capacity Outdoor Portable Energy Storage：Suitable for winter camping power supplies, RV parking energy storage and small household backup power. The 4000mAh high capacity prolongs endurance and ensures stable power supply in low-temperature environments in northern regions.
Northern High-Power Low-Temperature Power Tools：Applicable to winter lithium drills, garden equipment and industrial impact wrenches. 3C high-current output maintains consistent power performance without attenuation in sub-zero outdoor environments.
Cold-Region Field Monitoring IoT Equipment：Ideal for weather stations, pipeline inspection instruments and cold storage sensing terminals. Low self-discharge reduces manual maintenance frequency, while excellent vibration and damp-heat resistance ensures long-term stable field operation.
Low-Temperature Vehicle-Mounted & Emergency Starting Power：Designed for small vehicle-mounted emergency devices and engineering vehicle backup batteries, adapting to vehicles parked outdoors in winter low-temperature conditions.
Lightweight Field Surveying & Lighting Equipment：Perfect for low-temperature high-power flashlights, portable surveying devices and individual field emergency power supplies, balancing large capacity and lightweight advantages.
Ⅲ. Product Summary
The BHL18650-4000 low-temperature cell features core competitive strengths of 4000mAh ultra-high capacity, 3C high-power output and stable -40℃ low-temperature discharge. It also integrates five key advantages: balanced high and low temperature performance, reliable cycle life, full-range safety protection, superior environmental weather resistance and universal 18650 standard size. Custom-developed for high-capacity outdoor energy storage and northern industrial low-temperature equipment, it is equipped with complete charge-discharge specifications, professional PACK assembly guidelines and one-year process warranty, serving as the preferred high-capacity low-temperature lithium cell solution.
