High-safety lithium battery solution for smart trash bins and smart home devices

With the widespread adoption of smart home and municipal sanitation systems, smart trash bins require reliable power systems with enhanced endurance and safety. This solution focuses on lithium battery design and energy optimization, offering a cost-effective and high-performance power option.

1. Core Design Highlights

Voltage & Capacity Configuration

• Uses standard 4.2V lithium battery packs with typical capacities of 2000mAh to 3000mAh, supporting 2–3 months of standby (under typical usage).
• LiFePO4 battery solution (3.2V) recommended for stable voltage output scenarios, paired with buck-boost modules for system compatibility.

Smart Charging Management

• Integrated TP4056 or CN3058 charging IC, supporting constant current (500mA) and trickle charging modes; charging time approx. 4–6 hours.
• Triple protection circuit: overcharge, over-discharge, and short-circuit protection; battery cycle life ≥ 500 times.

2. Technical Implementation

Sensor Power Supply Strategy

• Infrared sensors and ultrasonic ranging modules use time-sharing power supply strategy; standby current controlled between 0.5–1.2mA.
• Overflow monitoring system with low-power Bluetooth module; peak power consumption ≤ 30mA.

Low Power Optimization

• Motor drive optimization: 3V DC motor with PWM speed control, reducing lid opening/closing power by 40%.
• Environment-adaptive algorithm: dynamically adjusts sensor sampling rate based on usage frequency, extending standby time by 20%.

3. Battery Life Optimization

4. Safety Protection System

Hardware Protection

• Built-in DW01A protection IC: overcharge cut-off at 4.25V ±0.05V, over-discharge cut-off at 2.4V ±0.1V.
• Temperature monitoring: NTC thermistor monitors in real time, triggers high-temperature alarm at 60°C, linked to management platform.

Software Protection

• Charging status indicated by tri-color LED (Red/Green/Blue).
• Battery health self-check with replacement notifications via mobile app.

5. Typical Application Scenarios

Standard Solution (4V2)

Infrared + vibration dual-trigger mode; 2000mAh battery supports over 100,000 lid operations, suitable for home and small office environments.

Municipal Sanitation Version

Integrated GPS + tilt detection module; built-in 6000mAh battery pack with a 3-year maintenance-free cycle, ideal for city sanitation systems.

DIY Upgrade

Six 14500 LiFePO4 cells in parallel (total capacity ~3000mAh); extends battery life by over 3x, suitable for custom modifications.

6. Smart Home Application Scenarios

The Motoma lithium battery solution can also be extended to a wide range of smart home devices with similar power and safety requirements:

• Smart Pet Feeders: Stable 5V output ensures continuous feeding schedules; 3000mAh battery supports up to 30 days of operation.
• Automatic Curtain Systems: Paired with low-speed motors and light sensors; 3500mAh battery allows daily operation for 2 months.
• Smart Toilet Lids: Support for motion sensors and heating modules; enhanced protection circuits improve bathroom safety.
• Sensor-Based Night Lights: PIR or light-sensing activation with ultra-low standby power, suitable for battery-powered deployment.
• Smart Storage Cabinets: Integrated with fingerprint locks or RFID sensors; lithium batteries replace traditional dry cells with better stability.

Note: Actual solution should be tailored based on device power consumption (recommended 0.8–1.5W) and internal structure. It is highly recommended to use UN38.3 certified battery packs for safe transportation and compliance.