I.Background of Snowmobiles and Extreme Sports Equipment
Snowmobiles can be traced back to the early 20th century in Northern Europe and North America, and were initially used as a means of polar exploration and winter transportation. In 1912, the Baltic Factory in Russia produced the first batch of transport snowmobiles, which were first applied to the battlefield in 1915. After the 1950s, snowmobiles gradually commercialized and became an important piece of equipment for winter sports and leisure entertainment.

Technological innovation
▲ Power system: In the early days, fuel drive was the main type. In recent years, electric snowmobiles have gradually risen to prominence due to their environmental friendliness and low noise. Some products can even operate in extremely cold environments of -55℃.
▲ Materials and Design: Modern snowmobiles are made of high-strength lightweight materials (such as aluminum alloy and carbon fiber), and are equipped with electronic control systems, intelligent navigation and anti-slip tracks, significantly enhancing handling and safety.
Intelligent upgrade: The introduction of autonomous driving assistance, real-time terrain adaptation algorithms, etc., has enhanced performance in complex environments.

The expansion of application scenarios for extreme sports equipment
Entertainment and competition
   Snowmobiles have transformed from functional tools into core equipment for extreme sports. For instance, in international events such as the Asian Winter Games, snowmobiles are not only used for transporting athletes and supplies, but also have given rise to professional events like racing and fancy performances, becoming highlights of the events.

2. Professional rescue and exploration
   In extreme environments (such as snow-capped mountains and polar regions), snowmobiles are used for rescue patrols and scientific research. For instance, the high-altitude tracks in the Yabuli Snow Race area rely on snowmobiles to ensure the safety of the event.

3. Integration of culture and tourism
   The winter tourism boom has driven snowmobiles to become a popular experience. Places like Tongjiang in Heilongjiang Province have attracted domestic and foreign tourists with their independently developed snowmobiles, and even exported them to Russia and Eastern European countries.

The driving force of industry development
1. Policy support
   China has introduced a number of policies to encourage the development of the ice and snow industry, such as the "Development Plan for Ice and Snow Sports" and 30 measures to support the ice and snow economy, promoting the improvement of the snowmobile industry chain and technological innovation.

2. Market demand has increased
▲ Consumption upgrade: With the popularization of outdoor sports, consumers' demand for high-performance and multi-functional snowmobiles has increased. The compound annual growth rate of the Chinese market size exceeds 10%, and it is expected to exceed 200 billion yuan by 2025.
▲ Regional expansion: The northern market dominates, but the rise of winter tourism in the south (such as the introduction of snowmobile rental services at ski resorts in Zhejiang) has injected new vitality into the industry.

3. Industrial chain synergy
   A complete industrial chain from component production to complete machine assembly has been formed in China. Leading enterprises (such as those of the Hezhen ethnic group) have enhanced their international competitiveness through independent research and development. By 2025, the order volume is expected to reach 4,000 units, with overseas markets accounting for 75%.

Challenges and Future Trends
1. Environmental protection and sustainability
   The emission issue of fuel-powered vehicle models has drawn attention, and electrification and hydrogen energy technologies have become the focus of research and development. Some enterprises have launched zero-emission models, but they still need to solve technical bottlenecks such as the performance of low-temperature batteries.

2. Market Competition and Localization
   Although the performance of domestic snowmobiles has improved (such as power and cold resistance), the high-end market is still dominated by international brands. Domestic enterprises need to narrow the gap through technological breakthroughs (such as adaptability to extremely cold environments) and brand building.

3. Technology integration and Emerging business forms
▲ Intelligence: By integrating 5G and Internet of Things (iot) technologies, develop remote monitoring and intelligent dispatching systems.
▲ Cross-border applications: Combined with drones and AR technology, it expands to scenarios such as environmental monitoring and virtual events. For example, the AR interactive snowmobile game "2XL Snocross" promotes the digitalization of sports.

   The background of snowmobiles and extreme sports equipment is rooted in the synergy of technological iteration, market demand and policy guidance. From polar transportation tools to winter sports symbols, its development process reflects a dual evolution of functionality and entertainment. In the future, the industry needs to continuously break through in environmental protection, intelligence and international competition to consolidate its core position in the ice and snow economy. With people's growing desire for extreme sports, lithium batteries, with their advantages of high energy density, portability, long cycle life and environmental friendliness, are gradually replacing traditional batteries as energy sources and have become the preferred solution for the power systems of extreme sports equipment. This solution is designed to meet the lithium battery application requirements of snowmobiles and extreme sports equipment projects, aiming to satisfy the high demands of diversified applications. It introduces a lithium battery application solution featuring ultra-low temperature, high power, high safety, and long life, ensuring that snowmobiles can provide safe, efficient, and customized power solutions in extremely cold weather conditions.

II. Analysis of Equipment Demand Characteristics
1. Equipment application characteristics
▲ Equipment type: Operating under extremely cold conditions for a long time.
▲ Working environment: Temperature range, -40℃ to +70℃, high humidity environment, high corrosion, etc.
▲ Power demand: Large continuous/peak power and long battery life. The voltage platform generally adopts 48V, 60V or 72V and other voltage platforms.

2. Core requirements for lithium batteries
▲ High safety: Meets the explosion-proof, shock-proof, waterproof and corrosion-resistant requirements of special equipment under harsh working conditions.
▲ Long cycle life: ≥2000 times (80% capacity retention rate).
▲ Fast charging: Supports 1 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: IP65~IP68 protection grade, shock-resistant structure, explosion-proof enclosure (suitable for extremely cold or high-pressure 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, and physical temperature control is possible (for high-power scenarios), ensuring temperature uniformity during battery use and effectively controlling 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.

3. 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 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 3,000 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 explosion-proof, shock-resistant, and extremely cold) 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.