Fuel cell current density partition test system and method

Abstract

The invention discloses a fuel cell current density partition test system and method, and belongs to the technical field of fuel cell in-situ detection. The system comprises a gas supply module, an electronic load, a signal amplification module, a data acquisition module, a data processing module and a fuel cell stack. The gas supply module provides an oxidizing agent and fuel for the fuel cell stack, the electronic load is loaded on the fuel cell stack, the signal amplification module amplifies a signal transmitted by the fuel cell stack, the data acquisition module acquires an output signalof the signal amplification module, and the data processing module processes the signal acquired by the data acquisition module. According to the invention, the sampling resistor is placed at the backof the partitioned gold-plated copper foil, so that the consistency of impedance of each partition is ensured. The impedance of each subarea is consistent, so that the sampling result can truly reflect the actual current density distribution characteristic in the galvanic pile. The problems that the precision of the sampling resistor is difficult to control and the device cost is high are solved,and the current density distribution of a large number of matrix partitions can be measured.

Description

technical field [0001] The invention belongs to the technical field of in-situ detection of fuel cells, and in particular relates to a fuel cell current density partition testing system and method. Background technique [0002] Energy is an important foundation for the stable development of society and an important guarantee for economic growth. At present, the vast majority of energy in human society comes from fossil fuels, and the reserves of global fossil energy are limited, and there is a natural contradiction between it and the continuous demand for energy for the sustainable development of human society. In order to solve this potential contradiction, it is imperative to develop efficient and sustainable new energy sources. Due to its high efficiency and non-pollution characteristics, fuel cells have become a research hotspot around the world. With the deepening of fuel cell research, the bottleneck of its commercialization is also revealed, such as reliability, dur...

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Problems solved by technology

The buried resistance type, such as the patent application whose publication number is CN103576095A and the title of the invention is "a real-time detection system and method for fuel cell internal characteristics", embeds the sampling resistor into the circuit board, and then places the circuit board on the anode of the fuel cell to measure the current density. distribution, but the current domestic buried resistance technology is immature, the price is high, and the accuracy of the buried resistance value is difficult to control, so additional resistance calibration equipment is required to calibrate the sampling resistance of each partition, which increases the difficulty of measurement; the external sampling resistance such as The patent application with the publication number CN108562783A and the title of the invention is "a partition test system and method for fuel cell cold start current density and temperature". Metal copper foil is connected, but when the number of partitions increases, due to design, process and other reasons, this method cannot guarantee that the impedance of each partition sub-part remains consistent, and the inconsistency of the impedance of each partition will lead to changes in the current density distribution inside the fuel cell , leading to unreliable measurement results

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