I. Project Background of Power Supply Equipment for Security System Control Center
   With the growth of security demands: In modern society, security precautions are extremely important. Whether it is urban infrastructure, commercial areas, residential communities, schools, hospitals or other public places, they all face security threats such as theft, violence and terrorist attacks. Security systems, as a key means to ensure safety, have increasingly complex coverage and functions. As the core of the security system, the control center is responsible for centralized management and control of monitoring equipment, alarm devices, etc., to ensure the stable operation of the system. It is of vital importance for maintaining social order and protecting people's lives and property.
   Unstable mains power supply: The mains power supply is affected by factors such as grid failures, power allocation, and bad weather, which can easily lead to voltage fluctuations and power outages. If the security system control center encounters an abnormal mains power supply, it may lead to serious consequences such as the shutdown of monitoring equipment, data loss, and the failure of the alarm system. For instance, thunderstorm weather may trigger instantaneous overvoltage in the power grid, impacting security system equipment and causing damage. A long power outage can paralyze the security system, posing a huge risk.
Limitations of backup power sources: Traditional backup power sources such as lead-acid batteries, although they can provide emergency power when the mains power is interrupted, have disadvantages such as large size, heavy weight, large space occupation, low energy density, and limited battery life. Lead-acid batteries have a limited number of charge and discharge cycles, a short service life, and require regular maintenance and replacement, resulting in high maintenance costs. Harmful gases may be produced during the charging and discharging process, polluting the environment.
   New energy lithium batteries, with their advantages of high energy density, light weight, long cycle life and environmental friendliness, have gradually become the preferred power supply solution for security system equipment. This solution is designed to meet the application requirements of lithium batteries in security system equipment power supply projects, ensuring that lithium batteries provide safe, efficient and customized power supply solutions for their equipment

II. Analysis of Equipment Demand Characteristics
1. Equipment application characteristics
▲ Equipment types: Indoor security control center, real-time management and control in mobile security control, etc.
▲ Working environment: Temperature range, -40℃ to +70℃, high temperature, 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 36V or 48V.

2. Core requirements for lithium batteries
▲ High safety: Meets the explosion-proof, shock-proof and waterproof requirements of the 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 chargers/chargers/charging cabinets, solar photovoltaic, 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 about 30% to 50% higher than that in lead-acid batteries, but their lifespan is extended by more than three times and the long-term cost is reduced by 40% to 60%.
2. Energy-saving benefits:
▲ The charging efficiency is over 95%, significantly reducing energy consumption compared to lead-acid batteries (70% to 80%).
3. Maintenance cost:
▲ Maintenance-free design reduces the costs of manual inspection and electrolyte replenishment.

VII. After-sales Service
1. Warranty period: 1 to 5 years of after-sales warranty, with a lifespan of 500 to 2,000 cycles or more (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 (such as plateaus and deep Wells) 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.