Application | NGI Full-Series Source and Load Products Support Comprehensive Testing for Automotive DC/DC Converters

Rapid Development of the New Energy Vehicle Industry

With growing global emphasis on environmental protection and sustainable development, the new energy vehicle (NEV) industry is experiencing rapid growth. As the "heart" of an NEV's onboard power system, DC/DC converters are witnessing significant expansion. In 2024, China's NEV DC/DC converter market reached 22.067 billion yuan, and it is projected to grow to 48.323 billion yuan by 2028.

The evolution of vehicle electrical architectures is driving the trend of multi-integrated DC/DC converters, where devices such asOBC (On-Board Charger),PDU (Power Distribution Unit), and DC/DC converter are deeply integrated into consolidated charging systems. For example, the parameters of a three-in-one OBC from a leading brand are as follows: 

Testing Requirements

Test Scenario 1: R&D Performance Testing

Manufacturers, third-party testing agencies, and OEMs typically refer to the GB/T 24347-2021 standard to evaluate DC/DC converters. Key test items include input/output characteristics and protection features.

For example, in "overshoot and recovery time" testing, when the load changes abruptly, the output voltage overshoot should not exceed 10%, and the recovery time should be ≤5 ms. This demands high dynamic response performance from electronic loads, typically requiring a current rise slope of A/μs.

Test Scenario 2: Aging Testing

Before DC/DC converters leave the factory, manufacturers usually conduct aging tests, which are time-consuming and energy-intensive. For instance, a 3.5 kW DC/DC converter undergoing a 24-hour aging test incurs electricity costs exceeding 80 yuan per unit. At an annual production scale of 10,000 units, this results in millions of yuan in electricity costs, along with additional cooling expenses.

Test Scenario 3: Multi-Integrated Testing

With the trend toward multi-integrated DC/DC converters, simultaneous performance testing for DC/DC, PDU, OBC, etc. is required, placing higher demands on equipment functionality.

NGI Full-Series Source & Load Products: A Perfect Match for Testing Needs

1. Fast Load Response

The N69200 series supports 30 A/μs high-speed dynamic response and slope loading, enabling flexible and rapid testing for overshoot and recovery time evaluations.

2. Source-Load Integration with Energy Recovery

The N35500/N35100 series bidirectional DC power supplies combine power sourcing and regenerative load capabilities. For multi-integrated DC/DC, PDU, and OBC aging tests, these products can both supply and absorb power, feeding energy back to the grid with up to 93% efficiency, significantly reducing energy consumption.

3. Comprehensive Testing Solution Recommendations