I. Background of Financial Consumption POS Machines
   The development background of financial consumption POS machines mainly includes the following aspects:
Business development demands
▲ Transformation of consumption patterns: With economic development, people's incomes have increased, and their consumption demands and patterns have changed. Cash payment has problems such as the trouble of giving change, inconvenience in carrying, and security risks. Consumers' demand for more convenient and fast payment methods is on the rise, and merchants also hope to improve the efficiency of cash registers. Financial POS machines precisely meet this demand.
▲ Diversification of business forms: Various commercial venues such as retail, catering, and hotels are constantly emerging, with their business scale and transaction volume expanding. There is a need for more efficient payment and settlement tools to manage transactions. Financial POS machines can achieve functions such as quick settlement, transaction recording, and management, adapting to the development of diversified business forms.

Promotion of the financial industry
▲ Business expansion of banks and other financial institutions: In order to increase business income and expand the customer base, banks and other financial institutions actively promote the business of financial POS machines. By installing POS machines for merchants, banks can earn transaction fee income. At the same time, they can also absorb merchants' deposits, bind customer resources, and promote their own business development.
▲ The payment and settlement system is well-developed: The construction and improvement of a modern payment and settlement system provide fundamental support for the wide application of financial POS machines. Technological development support
▲ Improvements in chip technology and security technology: The application of chip technology has transformed bank cards from magnetic stripe cards to chip cards, enhancing the security of payments. Meanwhile, the security technology of financial POS machines has been continuously upgraded, such as the adoption of encryption algorithms and security authentication technologies, effectively preventing risks like transaction information leakage and unauthorized transactions, and ensuring payment security.

Policy, regulation and specification
▲ Strengthened regulation of the payment industry: The government and regulatory authorities have introduced a series of policies and regulations to standardize and supervise the production, sales, and use of financial POS machines, ensuring the safety and stability of the payment market and promoting the healthy development of the financial POS machine industry.
▲ Industrial policy support: To promote the development of the payment industry, the government has introduced some supportive policies, encouraging financial institutions and enterprises to increase their investment in the research and development of payment technologies and equipment, which has facilitated the innovation and upgrading of financial POS machine technology.
   New energy lithium batteries, with their advantages of high energy density, long cycle life and environmental friendliness, are the preferred solution for lithium batteries in financial consumer POS machines. This solution is designed to meet the application requirements of lithium batteries in financial consumer POS machines, ensuring that lithium batteries can provide safe, efficient and customized power solutions in special fields.

II. Analysis of Equipment Demand Characteristics
1. Equipment application characteristics
▲ Equipment type: It can be used for payment operations in retail venues, catering and entertainment venues, hotel accommodation venues, various government payment institutions, etc.
▲ Working environment: Temperature range, from -20℃ to +70℃, high-temperature, high-humidity environments, etc.
▲ Power demand: Large continuous/peak power, long battery life, and the voltage platform generally adopts 3.7V or 7.4V and other voltage platforms.

2. Core requirements for lithium batteries
▲ High safety: Meets the explosion-proof, shock-proof, waterproof and anti-interference requirements of the equipment under harsh working conditions.
▲ Long cycle life: ≥500 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: -20℃ to +70℃. In a low-temperature environment of -20℃, 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, 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 can be reduced. Air cooling/physical 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.In terms of cost
▲ Reduce operating costs, lower risk costs and save financial costs.
2. Energy-saving benefits:
▲ It significantly reduces the consumption of electrical energy, decreases the demand for heat dissipation, and extends the service life of the equipment.
3. Maintenance cost:
▲ The design is intelligent, with a long service life and simple maintenance.

VII. After-sales Service
1. Warranty period: 1 to 5 years of after-sales warranty, with a lifespan of over 500 to 1,000 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 are involved, corresponding protective designs need to be added.
▲ It is recommended to conduct joint debugging with the equipment manufacturer to ensure that the battery is compatible with the entire machine system