1. Core Courier Shipping Labeling Scenarios

　　A battery-powered thermal printer is a critical mobility tool for logistics, engineered to print high-integrity shipping labels on-demand across courier workflows. It addresses industry pain points like delayed label generation, unreadable barcodes in harsh transit, personal information leakage, and system incompatibility with e-commerce platforms. Key scenarios now include AI-driven logistics data synergy with ZimaBoard AI servers, industrial robot collaborative labeling, and multi-device fast-charging integration:

　　1.7 Multi-Device Fast-Charging Collaborative Operation

　　Typical Use Case: Concurrent power supply for AGV robots, thermal printers, and handheld logistics terminals (e.g., barcode scanners, mobile POS) in medium-sized warehouses (20,000–30,000 daily parcels). The 120W GaN power module integrates PD3.0/QC3.0 protocols to enable fast charging for mobile devices while maintaining stable industrial power output.

　　Operational Logic: ZimaBoard AI server dynamically allocates power via Modbus RTU: 24V/5A (120W) to AGV robots during peak sorting; when robots enter standby, the module switches to fast-charging mode—USB-C port delivers 20V/5A (100W) PD3.0 power to printers’ lithium-ion batteries (reducing charge time from 4h to 1.5h), while USB-A port provides 12V/2.5A (30V) QC3.0 charging for handheld terminals . The built-in SW3516H protocol chip automatically identifies device types to avoid overcharging .

　　Key Advantage: Cuts mobile device downtime by 62.5% vs. standard charging; eliminates the need for separate industrial power supplies and consumer fast chargers, reducing warehouse equipment footprint by 40% (power density reaches 0.82W/cm³ ).

　　2. Critical Technical Specifications for Shipping Use

　　Shipping labels demand speed, security, and environmental resilience—supplement specs for 120W GaN power supply with PD3.0/QC3.0 protocols:

　　Battery Performance: 2000–5000mAh lithium-ion battery supporting 1000–2000 labels/charge; compatible with PD3.0 PPS (3.3–21V 5A) and QC3.0 (3.6–12V 200mV incremental adjustment) for 1.5-hour fast charging .

　　120W GaN with Fast-Charging Protocols: Industrial-grade multi-output design: 2x USB-C (PD3.0) + 1x USB-A (QC3.0) + 1x 24V DC (robot supply). PD3.0 supports 5V3A/9V3A/12V3A/15V3A/20V5A fixed gears and PPS dynamic voltage; QC3.0 compatible with Apple2.4A, AFC, FCP multiple protocols . Protection class IP65, with BP2628D PFC chip for EMI suppression (frequency jitter technology reduces electromagnetic interference with robot sensors ). Certified CE/FCC/RoHS/CQC (61 technical indicators cover safety and performance ).

　　GaN-Multi-Device Synergy: Weight 237.5g (60% lighter than traditional combined power solutions), dimensions 84×57×30.5mm (fits AGV control compartment ). Supports intelligent power distribution: dual USB-C simultaneous output 60W each, 1A1C combination output 87W+30W (total ≤120W ). 100W full-load operation for 1 hour, case temperature ≤75.1℃ (safe for 24/7 warehouse use ).

　　Printing Parameters: 40–100mm adjustable width; 203–300 DPI resolution; print speed ≥75mm/s. Fast-charging enabled printers resume operation in 15 mins (10% charge) for emergency label printing.

　　ZimaBoard & Fast-Charging Integration: ZimaBoard monitors battery levels of printers/terminals via IoT sensors; when remaining power <20%, triggers GaN module to prioritize 40% power to fast-charging ports (maintains 60% for robot basic operation).

　　3. Step-by-Step Shipping Labeling & Operational Protocol

　　Add steps for Fast-Charging Protocol Activation & Verification:

　　3.1 Pre-Operation Preparation (Including Fast-Charging Check)

　　Multi-Port Power Validation: Connect AGV to 24V DC port, thermal printer to USB-C1, and handheld terminal to USB-A. Use ChargerLAB POWER-Z KT002 to verify PD3.0 PPS output (3.3–21V) and QC3.0 voltage adjustment . Via ZimaBoard dashboard, confirm power allocation ratio (robot:printer:terminal = 60:30:10).

　　Protocol Compatibility Test: Charge printer with 20V5A PD3.0 (verify 1.5h full charge); charge terminal with 12V2.5A QC3.0 (check 1h charge to 80%). Simultaneously run robot sorting test to ensure no voltage drop (<0.5V fluctuation).

　　3.4 Fast-Charging Mode Switching Protocol

　　ZimaBoard detects robot idle state (no sorting commands for 5 mins) and sends "fast-charging priority" signal to GaN module.

　　GaN module reduces 24V output to 12V/3A (36W) for robot standby, redirects 84W to USB ports: USB-C1 (60W PD3.0) for printer, USB-A (24W QC3.0) for terminal.

　　When ZimaBoard receives new parcel orders, module switches back to industrial mode within 0.3s (restores 24V/5A to robot, suspends fast-charging).

　　3.5 Safety Rules for Fast-Charging & Industrial Power

　　Protocol Isolation: USB fast-charging ports must use dedicated cables (USB-IF certified for PD3.0) to avoid short-circuit with 24V industrial circuit.

　　Power Overload Protection: Enable ZimaBoard’s "120W total limit" alarm—if combined load (robot + chargers) exceeds 110W, module automatically reduces fast-charging power to 30W.

　　EMI Shielding: Install GaN module with HP1010 PFC chip (enhances EMI performance ) at least 10cm from robot vision cameras to prevent signal interference.

　　5. Troubleshooting Common Shipping Issues

　　Add Fast-Charging Protocol-Related Issues:

　　Symptom 11: PD3.0 fast charging not activated for thermal printer

　　Root Cause: Non-compliant USB-C cable (lacks E-Marker chip), or SW3516H protocol chip firmware outdated .

　　Solution: Replace with USB-IF certified 100W cable; update GaN module firmware via ZimaBoard’s "Device Management" interface.

　　Symptom 12: QC3.0 terminal charging speed slower than standard

　　Root Cause: Voltage ripple >50mV (disrupts QC3.0 200mV adjustment ), or PFC chip failure .

　　Solution: Replace BP2628D PFC chip; use oscilloscope to verify ripple <30mV; check terminal QC3.0 compatibility (e.g., old devices only support QC2.0).

　　Symptom 13: GaN module shuts down during dual fast-charging

　　Root Cause: Concurrent 100W PD3.0 + 30W QC3.0 exceeds 120W limit, triggering overcurrent protection .

　　Solution: Disable one fast-charging port via ZimaBoard; adjust power allocation to 87W PD3.0 + 30W QC3.0 (total 117W ).

　　6. Shipping Printer Maintenance & Storage

　　Add Fast-Charging Protocol Maintenance:

　　Protocol Chip & Port Inspection: Monthly, use ZimaBoard to run "Protocol Diagnostic"—verify PD3.0 PPS voltage range and QC3.0 gear switching. Clean USB ports with alcohol swabs (prevents dust-induced contact failure).

　　Firmware & Certification Update: Quarterly, sync GaN module firmware with CQC latest standards ; re-test protocol compliance with ChargerLAB tool after update.

　　Fast-Charging Cable Management: Replace USB-C cables every 6 months (or if E-Marker chip fails); label PD3.0/QC3.0 dedicated cables to avoid cross-use with non-compliant accessories.

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