Emergency rescue equipment serves as the core facility for life rescue, disaster investigation, environmental monitoring and emergency disposal at the scene of sudden disasters such as earthquakes, floods, fires, mine accidents, hazardous chemical incidents and nuclear accidents. It includes emergency rescue robots, life detectors, demolition equipment, fire-fighting devices, emergency lighting, environmental monitors, emergency communication equipment and nuclear emergency disposal tools. The high-voltage power supply is a critical power component of emergency rescue equipment. It delivers stable high-voltage power to detection sensors, driving actuators, high-pressure demolition devices, communication systems, detection radars and radiation monitoring equipment. It converts power from emergency batteries, generators and vehicle-mounted supplies into high-voltage DC power required by rescue devices. Its wide input compatibility, extreme environmental adaptability, high reliability, portability, protection performance and battery life directly determine the normal operation of rescue equipment, rescue efficiency and even the safety of trapped personnel. Emergency rescue scenarios impose extreme technical requirements and core challenges that differ greatly from conventional industrial power supplies. First, ultra-wide input voltage adaptability. Power sources for rescue operations are highly diverse, including lithium batteries, lead-acid batteries, vehicle generators, fire truck power supplies, diesel generators and solar panels. Voltage levels and output characteristics vary significantly; battery voltages fluctuate sharply with discharge depth and temperature, while generator outputs change drastically with speed and load. Damaged power supplies and abnormal voltages are common during disasters. The power supply must support an input range covering 20%~200% of the nominal value, operating normally under DC 9V~36V, DC 48V~300V and AC 110V~240V. Stable startup and full-load output are required even at 20% of the nominal input to adapt to complex and unstable power conditions on site. Second, full-scene adaptability to extremely harsh environments. Rescue equipment operates in earthquake ruins, flooded areas, high-temperature fire sites, underground mines, high-altitude cold regions, nuclear radiation zones and hazardous chemical leakage areas. It faces wide temperature variations from -40℃ to +60℃, humidity above 95%, water immersion, dust, salt spray, severe vibration and shock, strong electromagnetic interference, nuclear radiation and corrosive gases. The power supply must start reliably and operate stably under all extreme disaster conditions. Third, high reliability and fault tolerance. Emergency rescue is irreversible; equipment failure interrupts operations, misses optimal rescue windows and endangers lives. On-site maintenance is impossible. The power supply must achieve an MTBF ≥ 5×10⁴ hours with comprehensive redundancy, fault tolerance and automatic recovery to ensure uninterrupted power without manual intervention. Fourth, portability and high power density. Rescue devices are usually carried manually or mounted on small robots and UAVs, requiring extremely compact and lightweight power supplies. The power density must reach ≥200W/in³ with integrated miniaturized lightweight design for mobile emergency applications. Fifth, low power consumption and long endurance. Stable power is scarce at disaster sites, and equipment relies mainly on batteries. Standby power must be below 10mW with peak efficiency ≥93% and high efficiency maintained from 10% to 100% load to extend operating time during prolonged rescue missions lasting dozens of hours or days. Sixth, comprehensive protection and intrinsic safety. Flammable gases, toxic vapors, chemical leaks and flooding require full protection against overvoltage, overcurrent, short circuit, overheating, reverse connection, surges and electric leakage. Explosion-proof, waterproof, dustproof and corrosion-resistant performance is mandatory. Equipment for flammable environments must comply with GB 3836 intrinsic safety standards to prevent secondary disasters. Seventh, strong electromagnetic compatibility. Rescue sites contain numerous communication, demolition and fire-fighting devices with complex electromagnetic fields. The power supply must feature ultra-low radiation and conducted interference while maintaining high immunity to ensure stable operation without disrupting sensitive detectors and communication systems. Eighth, fast dynamic response and wide load adaptability. Loads change drastically from milliwatt-level sensors to kilowatt-level demolition devices within microseconds. Output voltage fluctuation must stay below ±3% with settling time<100μs during="" full-step="" load="" supporting="" capacitive="" and="" impact="" loads.="" targeting="" the="" core="" operating="" demands="" technical="" challenges="" of="" high-voltage="" power="" supplies="" for="" emergency="" rescue="" this="" methodology="" establishes="" a="" comprehensive="" framework="" covering="" wide-input="" topology="" full-scene="" extreme="" environment="" high-reliability="" lightweight="" intrinsic="" safety="" protection="" low-power="" long-endurance="" enhancement.="" it="" provides="" standardized="" design="" guidelines="" domestic="" component="" localization="" performance="" improvement="" across="" all="" devices.="" to="" address="" wide="" input="" full="" environmental="" high="" reliability="" adopts="" buck-boost="" front="" stage="" full-bridge="" llc="" resonant="" isolated="" back="" fully="" digital="" adaptive="" .="" combined="" with="" redundancy="" overcomes="" traditional="" limitations="" narrow="" poor="" insufficient="" low="" portability.="" realizes="" stable="" step-down="" conversion="" over="" an="" ultra-wide="" converting="" highly="" variable="" into="" steady="" dc="" bus.="" rear="" delivers="" high-efficiency="" output="" soft="" switching="" loads="" reduce="" loss="" emi="" while="" enabling="" compact="" modular="" integration="" eight="" principles="" are="" defined:="" 1.="" parameter="" optimization.="" two-stage="" structure="" supports="" inputs="" from="" nominal="" voltage="" automatic="" compatibility="" via="" rectifier="" pfc="" circuits="" achieving="" factor="">0.98. Full-range ZVS and ZCS soft switching ensure peak efficiency ≥93%. 2. Full-scene extreme environmental protection. A multi-layer system ensures wide-temperature operation (-40℃~+60℃), IP67/IP68 waterproof dustproof corrosion resistance, structural reinforcement against 50g shock and 10g vibration, radiation hardening for nuclear scenarios, and GB 3836 Ex ia IIC T4 intrinsic safety for flammable environments. 3. High reliability with fault tolerance and auto-recovery. Strict component derating, full-circuit redundancy at device, circuit and system levels with hot backup ensure uninterrupted power. Multi-level watchdog and automatic recovery handle transient faults; reverse connection and short-circuit tolerance prevent permanent damage. Real-time health monitoring with LED and buzzer alarms simplifies on-site diagnosis. 4. Portable lightweight high-density integration. Higher switching frequency (100kHz~300kHz), planar magnetics, integrated power modules, multi-layer PCB stacking and lightweight materials achieve power density ≥200W/in³ and weight-power ratio ≤0.8kg/kW with ergonomic mechanical structures. 5. Low-power long-endurance optimization. Full soft switching maintains high efficiency under light loads; four operating modes (normal, energy-saving, standby, sleep) minimize static power down to 10μA in sleep mode. Low-power components and integrated battery management prevent over-discharge and enable low-battery alerts. 6. Fast dynamic response and wide load compatibility. Dual current-voltage closed-loop control with load feedforward ensures rapid transient performance with voltage deviation <±3% within 100μs during full load steps. Stable operation covers no-load to 120% overload with support for all load types; constant-current limiting and hiccup-mode short-circuit protection handle impact loads and fault recovery. 7. Full intrinsic safety protection. Dual hardware-software protection provides ultra-fast (<1μs) irreversible safety mechanisms including anti-reverse, over-temperature, surge and leakage protection. Isolated safety barriers and dual energy limiting comply with intrinsic safety requirements; high-voltage residual charge discharge and safety interlocks ensure operator safety during maintenance. 8. Electromagnetic compatibility and interference immunity. EMI suppression via soft switching, optimized power loops, multi-stage filtering and fully shielded enclosures achieves shielding effectiveness ≥60dB. Immunity meets GB/T 17626 Level 4 to ensure stable coexistence with communication, detection and demolition equipment on site. This comprehensive methodology resolves traditional weaknesses including narrow input range, poor environmental tolerance, insufficient reliability and low portability. It achieves ultra-wide voltage compatibility, full extreme-environment adaptability, high efficiency with long endurance, absolute operational continuity and complete intrinsic safety. Widely applicable to life detectors, rescue robots, demolition tools, environmental monitors, communication devices and fire-fighting systems for earthquakes, floods, fires, mine disasters, nuclear accidents and chemical emergencies, it delivers key technical support for domestic substitution and performance upgrading of core emergency rescue power equipment.