I. Background of the Field Medical Rescue Support Vehicle Project
   With the emergence of the field medical rescue support vehicle project to meet the urgent needs of medical rescue in complex environments, it combines multiple practical and development demands. Frequent natural disasters have led to damage to transportation and communication facilities, making it difficult for traditional rescue forces to arrive promptly. With its mobility, the support vehicles can quickly reach the disaster-stricken areas to provide emergency treatment, becoming a key link between the affected people and professional medical resources. For example, in the ruins of an earthquake, support vehicles can set up temporary medical stations to carry out first aid treatment and buy time for the transfer of the injured. In military operations, soldiers getting injured occurs from time to time. The support vehicle can accompany the troops in their actions, serving as a mobile medical treatment unit. It can quickly carry out rescue work on the front line, reduce the mortality and disability rates, and ensure the combat effectiveness of the troops.
Medical resources are scarce in remote areas, making it difficult for residents to receive effective treatment in a timely manner. The support vehicles regularly go deep into these areas to provide services such as medical examinations, disease diagnoses, and basic treatments, alleviating the problem of difficulty in accessing medical care and making up for the uneven distribution of medical resources. The advancement of automotive manufacturing technology provides superior performance chassis for support vehicles. The trends of miniaturization, integration and intelligence of medical equipment enable advanced medical devices to be integrated into support vehicles to build mobile medical platforms. The upgrade of communication technologies, such as satellite communication and 4G/5G communication, ensures real-time contact between the vehicle and experts from the rear hospital, enabling remote consultation and enhancing the accuracy and scientific nature of rescue operations. New energy lithium batteries, with their advantages of high energy density, long cycle life and environmental friendliness, have gradually become the preferred solution for the power system of medical equipment. This solution is aimed at the application requirements of lithium batteries in medical support equipment projects, ensuring that lithium batteries can provide safe, efficient and customized power solutions for their equipment in special fields. We offer safe, efficient and customized power supply solutions.

II. Analysis of Equipment Demand Characteristics
1. Equipment application characteristics
▲ Equipment types: Emergency rescue, medical first aid, etc.
▲ Working environment: Temperature range, -40℃ to +70℃, high temperature, extremely cold, high humidity environment, high vibration, strong interference, etc.
▲ Power demand: Large continuous/peak power, long battery life, and the voltage platform generally adopts high-voltage platforms such as 60V or 72V.

2. Core requirements for lithium batteries
▲ High safety: Meets the explosion-proof, shock-proof, waterproof and anti-interference requirements of interference equipment under harsh working conditions.
▲ Long cycle life: ≥2000 times (80% capacity retention rate).
▲ Fast charging: Supports 2 to 3 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: 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 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
▲ Comply with national standards: 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 Used in Electric Vehicles), GB9706 series (Safety Standards for Medical Electrical Equipment), 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 direction
▲ Lithium batteries, as a new type of energy product, are energy-saving and environmentally friendly, portable and lightweight, have a low cost, and are easy to maintain. Compared with gasoline-powered products, they are superior.
2. Energy-saving benefits:
▲ The charging efficiency is over 95%, significantly reducing energy consumption.
3. Maintenance cost:
▲ The maintenance-free design significantly reduces manual inspection and manufacturing costs.

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).
▲ It is recommended to conduct joint debugging with the equipment manufacturer to ensure the compatibility of the battery with the entire machine system.