HONGE · Shenzhen Hongyi Electronic Technology Co., Ltd. Power Supply Solutions for CPR Machines
1. CPR Machine Overview
A CPR (Cardiopulmonary Resuscitation) machine is an emergency life-support device that delivers continuous, standardized chest compressions as a substitute for manual CPR. It maintains a consistent compression depth and rate (typically 100–120 compressions/minute). Widely deployed in pre-hospital ambulances, hospital emergency departments, and ICUs, it eliminates operator fatigue and inconsistent compression quality inherent in manual resuscitation.
Main Types:
Pneumatic: Oxygen-cylinder driven, simple structure, suitable for pre-hospital field or ambulance use.
Electric Electronically Controlled: Battery and motor powered; compression rate and depth precisely adjustable; some models feature real-time feedback.
Negative Pressure / Circumferential Compression: Ring-shaped negative pressure or full-thoracic compression belt devices that apply pressure across the entire thoracic cavity to improve venous return.
Core Advantages: Continuous and stable performance; standardized parameters compliant with international CPR guidelines; ideal for on-site emergency treatment and long-distance patient transport.
2. Special Power Supply Requirements for CPR Machines
CPR machines are life-support emergency devices governed by GB 9706.1-2020 and YY 9706.112-2021 (IEC 60601-2-30). The fundamental constraint: no unintended power loss or shutdown during operation. Deployment covers in-hospital care, ambulance transport, and pre-hospital field rescue.
2.1 Power Architecture and Switchover
Dual/multi-source supply: AC mains + built-in lithium battery; optional 12/24V DC input for ambulances. Battery charges while mains powers the machine, maintaining uninterrupted chest compressions.
Seamless hot swap: On mains failure, battery takes over automatically within ≤1 second. Compression must not stop and parameters must not drift. Hundreds of switchover cycles validated for reliability.
Battery hot-swap (high-end models): Batteries replaceable during operation without halting compressions. Dual battery compartments serve as mutual backups for prolonged rescue.
Safety: Power switching must not trigger misoperation or jamming of the compression mechanism.
2.2 Battery and Runtime Specifications
Runtime: Single fully charged battery supports ≥60 minutes of continuous compression (≥90 minutes common in clinical tenders). Dual-battery configuration delivers >120 minutes for pre-hospital transport.
Multi-level low-battery alarms: Audible, visual, and on-screen warnings. After alert, ≥10 minutes of valid compression remains for power source replacement.
Charging: Full charge ≤4 hours. Full BMS protection: overcharge, overdischarge, overcurrent, short-circuit, and thermal protection. Battery reverse-polarity protection.
Wide-temperature performance: Output unaffected from –10°C to +45°C; resistant to vibration and shock in bumpy ambulance environments.
Status indication: Clear SOC display and end-of-life reminder for preventive maintenance.
2.3 Medical Safety, Isolation and Leakage Current
Compliant with IEC 60601-1, 2×MOPP double patient protection, BF applied parts.
Leakage current limits:
Enclosure leakage: ≤0.1 mA (normal), ≤0.5 mA (single fault)
Patient leakage: ≤0.01 mA (normal), ≤0.05 mA (single fault)
Isolation safety maintained on battery power. Only medically certified adapters permitted.
2.4 Dynamic Load Characteristics (Critical)
CPR motors create periodic impulse loads: high inrush current at compression start, followed by current decay in repeating cycles.
Power supply must withstand frequent dynamic impulses without large voltage drops (which would cause inaccurate compression depth/rate). Overcurrent protection must avoid false triggering.
Battery BMS must tolerate pulsed discharge and must not latch off under impulse loading.
2.5 EMC Requirements
Compliant with YY0505 / IEC 60601-1-2 (4th edition):
Immunity: Withstands defibrillation discharge, two-way radio, ambulance radio, and patient monitor RF interference. Compression rate/depth stable; no crash or reset.
Emission control: Radiated/conducted noise from power supply shall not interfere with adjacent monitors/defibrillators.
Critical risk: Power circuit must not reset or shut down during defibrillation pulses.
2.6 Fault Safety, Alarms and Risk Management
Audible/visual alarms for: mains loss, battery failure, charging abnormality, battery end-of-life.
Single-point fault must not cause sudden compression halt. System enters predictable safe state; mechanical head manually releasable to prevent patient injury.
Power supply included in ISO 14971 risk management and FMEA analysis (covering mains loss, battery failure, impulse loads, EMC disturbance, thermal runaway).
2.7 Environmental and Mechanical Reliability
Power supply, adapter, and battery pack withstand ambulance vibration/shock.
Limited splash resistance (IPX4) for liquid spills at emergency scenes.
Operating temperature –10°C ~ +45°C; output and runtime remain within specifications across full range.
3. Shenzhen Hongyi Electronic Technology Co., Ltd. – Company Profile
Founded in 2014, Shenzhen Hongyi Electronic Technology Co., Ltd. is a high-tech enterprise specializing in R&D, production, and sales of Hongyi-brand open-frame standard medical switching power supplies, medical adapters, and customized medical power solutions.
R&D and production base: >2,000 m², nearly 100 employees.
ISO9001 certified (2015); RoHS management system implemented same year.
Products hold CE, CB, TUV, UL, CCC, PSE, CSA, KC and other global certifications; exported to 20+ countries across Europe, Americas, South Korea, and Southeast Asia.
300+ models of open-frame medical switching power supplies and adapters, power range 5W–3000W, widely used in life-support equipment, IVD devices, medical imaging, home medical devices, and energy surgical instruments.
4. HONGE Hongyi Power Supply Solution for CPR Machines
Feature
Specification
Power Range
200–600W medical switching power supply
Safety Rating
2×MOPP, CF-rated
Wide Temperature
–40°C ~ +70°C (suitable for high-altitude & mobile ambulance rescue)
Input Voltage
85–264VAC, compatible with global grids
System Option
Can be paired with BMS to deliver complete AC/DC uninterruptible power systems
Load Adaptation
Well adapted to medium & high-power electric CPR machines; excellent tolerance to motor impulse loads
Circuit Topology
LLC + PFC for high efficiency and reliability
Special Function
Motor back-EMF clamping for motor-type loads
Protection
Comprehensive protection functions for stable operation
Compliance
Medical safety and EMC standards
