I. Background of the Emergency X-ray Machine Lithium Battery Equipment Project
   With the advancement of medical equipment technology in response to public health events such as the COVID-19 pandemic, fever clinics and isolation wards need to conduct rapid chest X-ray examinations to assist in diagnosis. Emergency X-ray lithium batteries enable X-ray machines to be deployed quickly without power cords, flexibly used in isolation areas, avoid cross-infection, and improve diagnostic efficiency. After natural disasters such as earthquakes and mudslides, roads and infrastructure are damaged and regular power supply is difficult. Emergency X-ray lithium batteries power X-ray machines and can be used to quickly examine fractures, organ injuries, etc. in temporary medical tents, supporting emergency treatment. In the military battlefield, the wounded need to be diagnosed and treated in a timely manner. X-ray machines equipped with emergency X-ray lithium batteries can be deployed quickly along with military operations at frontline or field medical stations to examine gunshot wounds, shrapnel injuries, etc., determine the location and severity of the injuries, and assist military doctors in formulating surgical plans. 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 emergency X-ray machine equipment projects, ensuring that lithium batteries can provide safe, efficient and customized power solutions for exploration equipment in special fields.

II. Analysis of Equipment Demand Characteristics
1. Equipment application characteristics
▲ Equipment types: Emergency rescue, medical first aid, etc.
▲ Working environment: Temperature range, -20℃ to +70℃, high temperature, high humidity environment, high vibration, strong interference, etc.
▲ Power demand: Large continuous/peak power, long battery life, and the voltage platform generally adopts 12V or 24V and other voltage platforms.

2. Core requirements for lithium batteries
▲ High safety: Meets the requirements of explosion-proof, shockproof, waterproof and anti-interference 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: -20 ℃ 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 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.

4. 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
▲ As a new type of energy product, lithium batteries are energy-saving and environmentally friendly, portable and lightweight, with low costs and easy maintenance. Compared with AC wired power supply, 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.