Design scheme of lithium batteries for smart home appliances and electric curtains

Author: admin
Published on: 2025-06-01 00:00
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I. Background of Smart Home
   With people's pursuit of the quality of life, the development of electronic technology is constantly improving, and the intelligent development of home products is also becoming more extensive. The development of smart furniture is mainly reflected in the following aspects:

At the level of technological development
▲ Internet of Things (iot) technology: The maturity of iot technologies such as sensors and communication protocols enables furniture to be connected into a network, achieving interconnection and interoperability among devices. For instance, smart door locks can be linked with smart lighting systems to automatically turn on the lights when the door is opened.
▲ Artificial intelligence technology: The integration of artificial intelligence technologies such as voice recognition, image recognition, and machine learning into furniture endows it with intelligent interaction capabilities. For instance, smart sofas can adjust their angles through voice commands, and smart wardrobes can recognize clothes and manage them by category.
▲ Big data technology: By analyzing users' usage habits and preferences through big data, smart furniture can provide personalized services.

At the level of consumer demand
▲ The demand for convenience and comfort: People hope for a more convenient and comfortable life. Smart furniture can meet this demand. For instance, smart curtains can be remotely controlled to open and close, and smart air conditioners can automatically adjust the temperature.
▲ Pursuit of quality life: Consumers' demands for the quality of life have increased, and they are willing to pay for furniture with a sense of technology and intelligence. Smart furniture has become an important element in enhancing the quality and taste of home furnishings.
▲ Personalized customization demands: Consumers are no longer satisfied with uniform furniture. Smart furniture can be customized in terms of functions and appearance according to individual needs, such as customizing smart cabinets with specific storage functions.

Industry competition level
▲ The transformation of the furniture industry: The traditional furniture industry is highly competitive. Intelligence has become an important direction for transformation and upgrading. Many furniture enterprises have increased their investment in research and development and launched smart furniture products to enhance their competitiveness.
▲ Cross-border entry of technology enterprises: Technology enterprises have entered the furniture field by leveraging their technological advantages, bringing new design concepts and technological applications, and accelerating the development of smart furniture.

At the level of social environment
▲ The rise of the smart home market: The popularization of the smart home concept has provided a favorable market environment for the development of smart furniture. Consumers' acceptance of smart home systems has increased, and they are more willing to try smart furniture products.
▲ Policy support: The government has introduced relevant policies to support the development of the smart home industry, providing policy guarantees and financial support for the research and development, production and promotion of smart furniture.
   New energy lithium batteries, with their advantages of high energy density, long cycle life and environmental friendliness, are the preferred power solution for smart home products. This solution is designed to meet the application requirements of lithium batteries in smart home products, 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 is used in various industries of work and people's lives in daily life.
▲ Working environment: Temperature range, -20℃ to +70℃, high temperature, high humidity, high vibration environment, 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 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: 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, 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

Number

Progress stage

                  Project content

Periodic plan

1

Demand research

Equipment parameter and working condition data collection

Within one week

2

Scheme design

Customized battery packs and BMS development

2~3weeks

3

Sample testing Charging and discharging, high and low temperature, safety protection, structural performance verification testing, design compliance verification testing

3~4weeks

4

Small-batch trial production Material preparation plan, production assembly, aging, and full inspection and testing

2~3weeks

5

Medium-batch trial production Material preparation plan, production assembly, aging, and full inspection and testing

2~3weeks

6

Mass production Material preparation plan, production assembly, aging, and full inspection and testing

4~6weeks

7

Delivery, transportation and maintenance Installation and commissioning, operation training Within one week

VI. Economic Benefit Analysis
1.In terms of cost
▲ Improve the efficiency of space utilization to reduce space costs, enhance the convenience of life and lower the advantage of labor 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, and some devices are maintenance-free and easy to maintain.

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

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