Single cell diagnosis support device for fuel cell test and fuel cell diagnosis method

Abstract

The invention discloses a single cell diagnosis auxiliary device for fuel cell testing and a fuel cell diagnosis method. The device comprises a battery pack positive electrode relay, a battery pack negative electrode relay, a battery monomer positive electrode relay, a battery monomer negative electrode relay, a relay controller, a positive electrode diagnosis wiring piece and a negative electrode diagnosis wiring piece, the battery pack positive electrode wiring piece and the battery pack negative electrode wiring piece are respectively connected with the positive electrode and the negative electrode of the battery pack; the battery monomer wiring pieces are connected with the bipolar plates between the adjacent monomer batteries; the battery pack anode wiring piece is connected with the anode diagnosis wiring piece through the battery pack anode relay, the battery pack cathode wiring piece is connected with the cathode diagnosis wiring piece through the battery pack cathode relay, and the battery monomer wiring piece is connected with the anode diagnosis wiring piece through the battery monomer anode relay. And the battery monomer wiring piece is also connected with the cathode diagnosis wiring piece through the battery monomer cathode relay. The device has no electric shock risk and is convenient to operate.

Description

technical field [0001] The invention relates to the technical field of battery testing, in particular to a single battery diagnosis auxiliary device for fuel battery testing and a fuel battery diagnosis method. Background technique [0002] In the fuel cell test process, it is often necessary to measure each single cell to judge the output state of the fuel cell. For example, during a fuel cell test, it is generally necessary to monitor the output voltage of each single cell of the fuel cell, so as to visually see whether each single cell of the fuel cell is abnormal. In addition, when the fuel cell is tested, an AC impedance tester can be used to judge the dry and wet state inside the fuel cell. [0003] In the prior art, if the voltage output of a single cell is abnormal during the test, the tester generally needs to use a multimeter and other measuring tools to measure and confirm the single cell showing abnormal voltage to rule out whether it is caused by poor contact o...

AI Technical Summary

Problems solved by technology

However, at this time, the voltage and current of the fuel cell are high when the fuel cell is in the working output state, and there is a risk of electric shock if the voltage acquisition line is directly manipulated and measured. Risk of contact short circuit or open circuit

For another example, when testing a fuel cell, an AC impedance tester can be used to determine the dry and wet state inside the fuel cell, but the AC impedance tester has fewer signal acquisition interfaces, and generally only measures the AC impedance of the entire stack of fuel cells. However, if the AC impedance of each single cell or part of the fuel cell is measured, it is necessary to constantly change the position of the acquisition line of the AC impedance tester, which is very inconvenient and takes a long time.

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