Partition test system and method of cold start current density and temperature of fuel cell

Abstract

The invention discloses a partition test system of the cold start current density and temperature of a fuel cell. A fuel cell system comprises a fuel cell, a thermocouple, an ice bath, an air intake system module, a high and low temperature alternating box, a cooling tube, a data acquisition module, a data processing module, and a load. The test method comprises the steps that: a current density test board is placed at an anode; both the cathode flow field plate and the cathode end plate have jacks, and the thermocouple is placed in the jack; the ice bath provides cold junction compensation for the thermocouple; the temperature in the high and low temperature alternating box is set to be the ambient temperature of the cold start; the intake system module supplies the fuel cell with oxidantand fuel and is connected to the load to make it work normally; the data acquisition module collects the voltage of the sampling resistor and the thermoelectric potential of the thermocouple. The data processing module converts the collected signal into a current density distribution map and a temperature distribution map at each moment of the fuel cell. Compared with the prior art, the inventionhas the advantages of low manufacturing cost, accurate measurement, simple structure and the like.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a partition test system and method for the cold start current density and temperature of a fuel cell. Background technique [0002] Energy is the material basis for human survival, and it is also the source of power for economic growth. At present, most of people's utilization of coal, oil, natural gas and other energy sources have problems such as low utilization rate and environmental pollution. In order to adapt to the rapid development of society and economy, developing clean and sustainable energy and improving energy utilization efficiency have become urgent problems in today's society. Because the fuel cell itself has the advantages of no pollution to the environment, high energy conversion rate, and high reliability, it has broad development prospects in the new energy automobile industry, mobile power supply, and small and medium-sized power stations. Although the...

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Problems solved by technology

[0004] In view of the current partition test systems and methods, most of them have complex structures and cannot accurately reflect the current density and temperature distribution inside the battery. For example, "A Real-time Detection System and Method for Fuel Cell Internal Performance" by Lin Rui et al. (Patent No.: CN103576095A) , embed the current density sampling resistor and thermistor into the circuit board, and then place the circuit board on the anode to measure the current density and temperature of the fuel cell. The accuracy of the embedded resistance is difficult to control, so the circuit board needs additional resistance calibration equipment to calibrate the embedded resistance of the partition test board, which increases the difficulty of measurement. On the other hand, the measurement of the battery temperature is not placed on the cathode. The thermal conductivity of epoxy resin, the material of the circuit board, is only 0.2103W / mK, and there is a certain distance between the embedded thermistor layer and the upper surface of the partition test board, which will make it impossible to accurately measure the temperature change inside the battery

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