Application of NGI solutions for fuel cell testing

A fuel cell is a chemical device that converts the chemical energy of a fuel directly into electrical energy, also known as an electrochemical generator. Since fuel cells are not limited by the Carnot cycle effect, they can convert the Gibbs free energy in the chemical energy of the fuel into electrical energy through electrochemical reactions. They use fuel and oxygen as raw materials and have no mechanical transmission parts, so they have the advantages of high fuel energy conversion rate, low noise and zero emissions. In today's world where environmental problems are becoming increasingly severe, fuel cells are the most promising power generation technology from the perspective of saving energy and protecting the ecological environment. In recent years, fuel cells have been widely used in manned spaceflight, underwater submarines, distributed power stations, and rail transportation, and have always received high attention from governments and companies around the world. Based on years of experience in test and measurement instrument technology research and development and fuel cell industry application, NGI has developed a series of special instruments for fuel cell testing and is widely used in various fuel cell testing scenarios.

For fuel cell stack testing, NGI can provide single-chip and stack current pull-load testing, online impedance analysis, and stack single-chip voltage inspection. For the testing of fuel cell engine systems, NGI can provide not only single chip and stack testing, but also fuel cell engine DC/DC converter testing, fuel cell voltage inspection module calibration testing, hydrogen circulation pump and air compressor DC power supply.

NGI solutions meet the needs of fuel cell stack online impedance analysis, single chip voltage inspection, polarization characteristic curve testing, dynamic operating condition testing, rated/peak power testing, and stack durability testing. The polarization characteristics of fuel cells show the process that the output voltage of fuel cells gradually decreases with the increase of current. Under extreme conditions, the output voltage of fuel cells may be 0V. In order to ensure the minimum operating voltage at both ends of the load, the test can be implemented by connecting a boost power supply in series in the loop.
It meets the needs of fuel cell engine system starting/steady-state characteristic testing, dynamic response/cycle operating condition testing, rated/peak power testing, etc., especially in vehicle engine testing. The test for starting/steady-state characteristics can simulate the durability problems under real vehicle conditions. At the same time, the road conditions are simulated in the experiment, including idling, acceleration, deceleration and rapid driving.
It meets the requirements of DC-DC input and output characteristic testing, peak power and duration testing, cycle operating curve testing, dynamic response testing, etc. Through the test and analysis of the input characteristics of the DC-DC module, the polarization characteristics of the battery stack, system efficiency, low-temperature cold start, and discharge of residual voltage of the battery stack can be comprehensively considered.