Protection Performance Testing of DC/DC Converters for EV On-Board Power Supply

At LANDWORLD TECHNOLOGY, a trusted partner in EV on-board power supply solutions, we are committed to delivering products that meet the highest standards of reliability and safety. Among these, the automotive DC/DC converter plays a critical role in managing voltage transitions between high-voltage traction batteries and low-voltage vehicle electronics.

To ensure these converters function safely under all operational conditions, we conducted a comprehensive series of protection performance tests in accordance with GB/T 24347-2021, the national standard for DC/DC converters in electric vehicles.

Why Protection Performance Testing Matters

DC/DC converters power essential low-voltage systems such as ECUs, lighting, infotainment, and control modules. Protection against abnormal conditions is crucial to prevent damage, system instability, or potential safety hazards. LANDWORLD converters are designed with six integrated protection features:

• Input Overvoltage Protection

• Input Undervoltage Protection

• Output Overvoltage Protection

• Output Undervoltage Protection

• Output Overcurrent Protection

• Overtemperature Protection

These features ensure that the converter performs safely and consistently, regardless of the driving environment or electrical load.

Test Methodology: GB/T 24347-2021 Standard Compliance

Testing was conducted under controlled lab conditions using calibrated equipment. The converters tested were in production-ready condition, evaluated across real-world operational scenarios. Each protection function was triggered and monitored according to standardized procedures.

✅ Sample: Input Overvoltage Test

• Rated Current: 1.0 A

• Protection Trigger Point: 872 VDC

• Auto-Recovery Point: 859 VDC

• Specification: 870V ± 5V

• Result: Passed

Similar protocols were followed for the remaining tests, including undervoltage, overcurrent, and thermal protection. The converters responded promptly, with precise thresholds and smooth recovery, confirming their suitability for automotive-grade deployment.

Test Results and Key Findings

LANDWORLD’s EV DC/DC converters demonstrated:

• Accurate and consistent protection triggering

• Reliable self-recovery to normal operation

• Stable performance under load changes and thermal stress

• Full compliance with GB/T 24347-2021 standard      requirements

• Applicability across various EV platforms including passenger      cars, buses, logistics fleets, and utility vehicles

Designed for Safety. Validated for Confidence.

LANDWORLD’s protection performance testing reinforces our engineering focus on system safety, functional reliability, and regulatory compliance. These converters are not just built for energy conversion—they are built to protect every part of your vehicle’s electrical architecture.

Learn more about our EV on-board power supply technologies and protection strategies