I. Project Background of Active Infrared Intrusion Detector Equipment
   With the acceleration of urbanization leading to frequent population mobility, social security is facing challenges. Criminal acts such as theft threaten people's safety. Commercial, residential, public institutions and industrial facilities are in urgent need of effective security measures. The active infrared intrusion detector can promptly detect illegal intrusions, buying time for handling and meeting the social security needs. The public's safety awareness has increased, and they expect a safer living and working environment. Families and enterprises have increased their investment in security systems, and the market demand for advanced security products has risen. Active infrared intrusion detectors have become the focus of market attention due to their outstanding performance and applicability.
   Manual patrols have limitations. It is difficult to comprehensively monitor large areas and blind spots are prone to occur. Patrol personnel may miss potential safety hazards due to fatigue and negligence, and the labor cost is high. Simple protective facilities such as walls and fences only provide physical barriers and cannot effectively monitor and warn. Simple alarm devices have a high false alarm rate, and their detection range and accuracy are limited. The active infrared intrusion detector is suitable for complex industrial environments and can reliably protect the perimeter and important areas. Public institutions such as schools, hospitals and government agencies are densely populated and have significant safety responsibilities.
New energy lithium batteries, with their advantages of high energy density, light weight, long cycle life and environmental friendliness, have gradually become the preferred solution for active infrared intrusion detection systems. This solution is designed to meet the application requirements of lithium batteries in active infrared intrusion detection equipment projects, ensuring that lithium batteries provide safe, efficient and customized power solutions for their equipment

II. Analysis of Equipment Demand Characteristics
1. Equipment application characteristics
▲ Equipment type: Real-time monitoring of key locations such as schools, hospitals, and government agencies.
▲ Working environment: Temperature range, -40℃ to +70℃, high temperature, extremely cold, high humidity environment, high vibration, etc.
▲ Power demand: Large continuous/peak power, long battery life, and the voltage platform generally adopts high-voltage platforms such as 3.7V or 7.4V.

2. Core requirements for lithium batteries
▲ High safety: Meets the explosion-proof, shock-proof and waterproof requirements of special equipment under harsh working conditions.
▲ Long cycle life: ≥2000 times (80% capacity retention rate).
▲ Fast charging: Supports 1 to 2 hours of fast charging, suitable for high-intensity work.
▲ High-power discharge: The battery supports continuous high-current discharge, meeting the high-current requirements of high-power devices and ensuring their continuous and stable operation.
▲ Intelligent management: The BMS (Battery Management System) is equipped with functions such as overcharge protection, overdischarge protection, overcurrent protection, short-circuit protection, temperature protection, and fault diagnosis, making the battery more intelligent.
▲ Discharge temperature range: -40℃ to +70℃. In a low-temperature environment of -40℃, the battery's discharge efficiency is over 70%. A wider range of ambient temperature adaptability.
▲ Charging temperature: -20 ℃ to +50℃ range, with a wider adaptability to environmental temperatures.

III. Scheme Design
1. Battery selection
▲ Cell types: Ternary lithium batteries (ultra-low temperature, high energy density, high safety), lithium iron phosphate batteries (ultra-low temperature, high safety, long life), sodium-ion batteries (high safety, long life, good low-temperature performance). Different system cells are selected and matched according to different application scenarios.
▲ Battery combination configuration structure: Series and parallel schemes are designed based on the required voltage and capacity of the equipment to meet the requirements of different output voltage platforms.
▲ Structural design: IP65 to IP68 protection grade, shock-resistant structure, explosion-proof enclosure (suitable for extreme environments or flammable and explosive environments).

2. BMS Management System
Core functions:
▲ Real-time monitoring of the voltage, temperature, SOC (State of Charge), and SOH (State of Health) of individual battery cells.
▲ The battery charging active balancing technology enhances the consistency of usage among battery cells and extends the lifespan of the battery pack.
▲ The I2C/SMBUS/CAN/RS485 communication interface enables data interaction and communication with the main control system of the equipment.
▲ The Coulomb computing method makes the battery SOC more accurate and the battery smarter.

3. Charging solution
▲ Charging equipment: Customized smart charger/charger/charging cabinet, supporting constant current and constant voltage (CC-CV) charging.
▲ Charging strategy: Select fast charging or slow charging mode based on the working conditions to prevent battery overload.
▲ Intelligent control and management: Based on the technical performance characteristics of the battery, the battery charging process and fault diagnosis are intelligently controlled.

IV. Safety and Compliance
1. Safety protection
▲ Thermal management: By adopting a reasonable structural layout, thermal runaway is reduced. Air cooling/liquid cooling systems can be used (for high-power scenarios) to ensure temperature uniformity during battery use and effectively control battery thermal runaway.
▲ Fault protection: Multiple hardware protection mechanisms such as overcharge, overdischarge, short circuit, overcurrent, and over-temperature.
▲ Fault protection: Multiple hardware protection mechanisms such as short circuit, overcurrent, and over-temperature.
▲ Explosion-proof certification: The design can pass various safety regulations certifications.

2. Standard compliance
▲ It complies with national standards such as GB31241-2022 (Safety Technical Specification for Lithium-ion Batteries and Battery Packs for Portable Electronic Products), GB 17761-2024 (Safety Technical Specification for Electric Bicycles), GB/T 34131 (Lithium Batteries for Power Storage), GB 38031 (Safety Requirements for Batteries for Electric Vehicles), etc.
▲ How to obtain domestic and international certifications: GB certification, UN38.3 certification, UL certification, IEC certification, CE certification and other various certification requirements.

V. Project Implementation Plan

VI. Economic Benefit Analysis
1.Cost comparison
▲ The initial investment in lithium batteries is relatively high, and the long-term cost of manual inspection is greatly reduced.
2. Energy-saving benefits:
▲ It significantly reduces the energy consumption of personnel work allocation.
3. Maintenance cost:
▲ Maintenance-free design reduces the cost of manual inspection.

VII. After-sales Service
1. Warranty period: 1 to 5 years of after-sales warranty, with a lifespan of over 500 to 800 cycles (whichever comes first).
2. Remote monitoring: According to the actual demand status, the cloud platform provides real-time monitoring of the battery status and early warning of potential faults.
3. Emergency Response: Respond within 4 hours, provide solutions within 8 hours, and offer on-site technical support within 24 to 48 hours.
Hint:
▲ The plan needs to be refined based on specific equipment parameters (such as voltage, capacity, and size limitations).
▲ If special environments are involved, corresponding protective designs need to be added.
▲ It is recommended to conduct joint debugging with the equipment manufacturer to ensure the compatibility of the battery with the entire machine system.