Home / KYS4040IL Low-Temperature Lithium Battery Pack
The KYS4040IL is a rugged lithium battery engineered for extreme cold. It features intelligent SMBus communication, an integrated LED state-of-charge indicator, and comprehensive protection against overcurrent, over-temperature, and short circuits. This reliable power solution is ideal for demanding low-temperature applications requiring consistent performance.
- Nominal Voltage: 10.8 V
- Rated Capacity: 8100 mAh
- Typical Capacity: 8400 mAh
- Internal Resistance: <200 mΩ @ 1kHz (25°C)
- Max. Charge Current: 8.0 A
- Max. Charge Voltage: 12.6 V
- Max. Discharge Current: 8.0 A
Get Free Quote 
Back to Product List
Overview
The Low-Temperature Lithium Battery Pack integrates multiple lithium-ion cells optimized for cold environments. Engineers design the pack to maintain consistent voltage and current even in subzero conditions. Integrated sensors monitor each cell continuously. Protective circuits prevent overcharge, over-discharge, and short circuits. Cooling and heating elements work together to stabilize internal temperatures. Wiring harnesses efficiently connect modules to ensure safe energy flow.
Materials and Cell Construction
Manufacturers use lithium-ion chemistry with graphite anodes and lithium metal oxide cathodes. Copper foil collects current from the anodes, while aluminum foil supports the cathodes. A microporous polymer separator allows ions to flow while preventing electrical contact between electrodes. The external casing consists of reinforced aluminum alloy and steel panels. Thermal insulation and low-temperature resistant coatings maintain stability under extreme conditions. Engineers apply corrosion-resistant finishes to protect against humidity and ice formation.
Electrical Configuration and BMS Integration
Technicians arrange cells in series and parallel configurations to meet specific voltage and capacity requirements. Electrode tabs are welded precisely to reduce internal resistance. The battery management system (BMS) monitors voltage, current, and temperature for each cell. It balances cells automatically, ensuring long-term stability. Strain relief is applied to cables to prevent loosening during vibration. Engineers periodically calibrate the system for accurate readings and safe operation.
Thermal Management and Safety
The pack features airflow channels, heat sinks, and optional heating pads for thermal control. Fans activate automatically based on temperature sensors. Insulation prevents accidental contact with live components. Maintenance panels allow easy inspection or replacement of modules without disassembly. Engineers verify airflow efficiency and temperature regulation using simulations and physical testing.
Standards and Quality Assurance
Production meets UL, IEC, and UN38.3 international standards. Each unit undergoes electrical, thermal, and cycling tests. Insulation resistance and leakage checks ensure safety and reliability. Documentation tracks every battery pack for traceability. These processes guarantee compliance and consistent quality across all units.
Product Details
Product Features
- Shelf item, minimum order 1 piece
- Standard SMBus v1.1 interface
- Integrated LED State of Charge (SOC) indicator
- Meets JEITA charging optimization rules
- Comprehensive safety protection functions, such as overcharge, over-discharge, overcurrent, over-temperature, and short circuit protection
- Features balancing function to effectively improve battery life
- Accurate power calculation
Product Application
- Low-temperature applications at -40℃
Technical Parameters
| Overview | |
| Initial Shipment Capacity | 20%~30% |
| Certifications | - |
| Operating Temperature | 0°C ~ 50°C (Charge) -40°C ~ 60°C (Discharge) |
| Storage Temperature | -40°C ~ 50°C (Max) -20°C ~ 35°C (Recommended) |
| Electrical Performance | |
| Nominal Voltage | 10.8V |
| Rated Capacity | 8100mAh |
| Typical Capacity | 8400mAh |
| Internal Resistance | <200mΩ @ 1kHz at 25°C |
| Max. Charge Current | 8.0A |
| Max. Charge Voltage | 12.6V |
| Max. Discharge Current | 8.0A |
| Cycle Life | 500 cycles ≥ 80% of rated capacity (Test standard: CC/CV charge 4.2A/12.6V; CC discharge 1.68A to 7.5V @ 25°C) |
| Size Specifications | |
| Length | 214.0mm ± 0.3mm |
| Width | 58.5mm ± 0.3mm |
| Thickness | 22.0mm ± 0.3mm |
| Weight | 486g±10g |
| Interface |  |
