Nepertraukiamo maitinimo šaltinis AQEX Balance Zero HAT, skirtas Raspberry Pi Zero 2 WH

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Prekė: Nepertraukiamo maitinimo šaltinis AQEX Balance Zero HAT, skirtas Raspberry Pi Zero 2 WH. Kategorija: Priedai.

• Gamintojas: AQEX
• Modelis: AQEX STUBBORN BALANCE ZERO

Ultra-Durable Maintenance-Free Hybrid Supercapacitor UPS HAT for Raspberry Pi Zero

Official Product Page: https://www.aqex.eu/stubborn-balance-zero-raspberry-pi-zero-ups-hat-hybrid-supercap.html

1. Product Concept & Strategic Advantages

The Stubborn Balance Zero is a specialized uninterruptible power supply designed for the Raspberry Pi Zero family. Unlike traditional battery-based systems, it utilizes Hybrid Supercapacitor (HSC) technology to provide a maintenance-free, high-endurance power backup solution for industrial and remote IoT applications.

Strategic advantages: Extended Runtime: Offers significantly higher energy density and longer backup power duration compared to standard supercapacitors. Extreme Longevity: The HSC technology supports up to 50,000 charge cycles, outlasting traditional Li-ion batteries. Maintenance-Free: No chemical aging typical of batteries; ideal for hard-to-reach deployments. Superior Temperature Stability: Operates reliably in environments where standard batteries would fail. Compact Form Factor: Designed specifically to match the Raspberry Pi Zero's footprint. Zero Maintenance: No periodic battery replacements required during the typical lifecycle of the equipment.

2. Comprehensive Technical Specifications

• Parameter, Value, Condition / Detailed Notes
• Input Voltage (USB-C), 5.0V – 5.2V, Minimum 2A - 3A recommended
• Output Voltage, 5.0V DC, Regulated for Raspberry Pi Zero
• Storage Technology, Hybrid Supercapacitor, High energy density with long cycle life
• Max Continuous Load, 3.5A, Enhanced current delivery for RPi 5 + Peripherals
• Cycle Life, ~50,000 Cycles, Industrial grade durability
• GPIO Interface, 40-pin Header, Pass-through design for stacking
• Switchover Time, 100 – 300 μs, No-reboot guaranteed transition

> Design Note: The Offline topology ensures almost zero power loss and heat generation during standard operation. A momentary (<1ms) voltage transient occurs during power failure; however, the Raspberry Pi's internal regulation easily filters this, ensuring zero system instability or reboot.

3. Power Management & Protection

• Feature: Specification
• Logic Control: Hardware-level voltage monitoring
• Safety: Protected against over-discharge and input voltage fluctuations
• Input Tuning: Potentiometer for input threshold calibration
• Restart Logic: Automatic recovery after power restoration in AUTO mode

4. User Interfaces & Configuration

4.1 Mode Selection (Switch 4)

• OFF: Complete power cut.
• ON: Immediate power-up when power (internal or external) is available.
• AUTO: Intelligent start-up logic; only boots the Pi when the battery reaches the "Min" energy level.

4.2 GPIO Communication

The system utilizes a 3-pin GPIO interface for OS-level integration. The following pins are used on the 40-pin Raspberry Pi header:

• PFO (Power Fail): GPIO 17 (Pin 11) — Signals external power loss (HIGH = OK / LOW = Backup Mode).
• LIM (Limit): GPIO 27 (Pin 13) — Signals that the battery has reached the critical low threshold.
• SHD (Shutdown): GPIO 22 (Pin 15) — Handshake signal. The UPS cuts power after the OS pulls this pin LOW (or the daemon signals a halt).

5. Visual Diagnostics (LED Indicators)

• LED, Color, Status / Meaning
• External Power, Green, Primary 5V power source detected.
• Full, Green, Battery fully charged (>3.9V).
• Min, Green, Sufficient energy for a safe boot-shutdown cycle.
• Safe, Yellow, Sufficient energy for a safe shutdown cycle.
• Low, Red, Critical level. Immediate shutdown required.

6. Intelligent Power Management (IPM)

• Safe-Start Logic: Prevents "brown-out" loops by ensuring the Pi only starts when the battery can support the peak current of the boot process.
• Shutdown Guard: Monitors the Pi's state and ensures power is only cut after the operating system has safely unmounted the filesystem.
• Input Threshold Tuning: Onboard potentiometer allows adjustment for voltage drops caused by long input cables.

7. Estimated Runtimes with Raspberry Pi Zero2 WH

• HSC Capacity, No Load, 100% Load
• 450F, 46 min, 13 min
• 850F, 60 min, 22 min
• 1100F, 105 min, 28 min

8. Software Support

• qups-guard: Native open-source daemon for automated monitoring and safe shutdown.
• Compatibility: Fully compatible with Raspberry Pi OS (Debian-based).
• Repository: github.com/aqexhu/qups-guard

HW Version: 1.0 | Released: 2025 Manufacturer: AQEX Electronics | aqex.eu

Specifications