Application of high performance electronic load in fuel cell anti-reverse polarity test

As a clean and efficient energy conversion device, fuel cells are widely used in energy, transportation and other industries. Their stability, service life and durability have always been the focus of industry attention. Reverse polarity, as a phenomenon that causes hydrogen fuel cell stack failure, has gradually become one of the focuses of related industries.

● Definition and hazards of reverse polarity

Reverse polarity is a phenomenon in which the output voltage of a fuel cell changes from positive to negative during operation. During the operation of the battery, when the fuel and oxidant are sufficient and effectively introduced into the battery, the electrochemical oxidation of the anode hydrogen fuel and the electrochemical reduction of the cathode oxygen will continue. However, factors such as start-stop, load change, operating errors and external environment can easily cause insufficient supply of anode fuel or cathode oxidant. When the gas shortage occurs, the working current of the battery will turn to drive the reverse polarity reaction in the anode or cathode, which will cause the battery output to become negative pressure.
The reverse polarity will generate huge heat, which is easy to cause pinholes in the proton membrane and cause a short circuit, which will cause irreversible attenuation of the fuel cell and even lead to catastrophic accidents. Therefore, anti-reverse polarity performance is the focus of fuel cell research and development, design, production and manufacturing.

● NGI Solution

NGI has been deeply involved in hydrogen fuel cell testing for many years. The N62400 series of ultra-low voltage and high current electronic loads launched by NGI can be used for fuel cell reverse polarity testing. It supports up to -3V@2160A load, which can meet the characteristic test of the full range of operating voltage points of a single fuel cell.

● NGI ultra-low voltage programmable electronic load

01 Product features:
Voltage range: 40V
Current range: 0-1200A
Minimum operating voltage under load: 0.1V@600A, 0.2V@1200A
CC/CV/CR/CP working modes
Dynamic test performance
The rising and falling slopes can be set independently
SEQ sequence test function, up to 100 groups of sequences, each sequence up to 50 steps
Analog programming interface, current monitoring interface, long and short range trigger function

02 Ultra-low voltage and high current performance:
N62400 series ultra-low voltage and high current DC electronic load has ultra-low operating voltage. The product supports a maximum output of 600A, and the minimum range voltage is 0.2V@600A. It can meet the user's characteristic test of almost all voltage points in the fuel cell test process, and can fully display the current value of the fuel cell in the entire voltage range. Thereby providing sufficient data support for the performance research of fuel cells.It supports voltage drop detection for each channel, supports data storage and query, and is convenient for users to save and analyze.

03 integrated design and simplified test system:
The N62400 series has high power density and is suitable for desktop use. It can also be installed in a 19-inch standard cabinet. The highly integrated design can simplify the complexity of the test system construction and save test costs. This can also minimize the signal interference of external equipment during the test process and ensure the reliability of the test process.As one of the best choices for fuel cell testing, welcome to consult the N62400 DC electronic load.