I. Background of the Special Intelligent Robot Project
   With the rapid development of new energy technologies, lithium batteries, with their advantages of high energy density, long cycle life and environmental friendliness, have gradually replaced traditional lead-acid batteries and become the preferred solution for the power systems of special equipment. This solution is designed for the lithium battery application requirements of intelligent robot projects in special application environments, meeting the high demands of diversified applications. It is applied in fields such as scientific investigation, field operation exploration, and field monitoring and inspection, ensuring that lithium batteries provide safe, efficient, and customized power solutions under extremely cold climate conditions.

II. Analysis of Equipment Demand Characteristics
1. Equipment application characteristics
▲ Equipment types: transportation in extreme environments, communication transfer stations, emergency rescue, unmanned operations, etc.
▲ Working environment: Temperature range, -50℃ 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 48V or 72V.

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
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 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.

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 (such as explosion-proof, deep sea, aerospace) 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.