Insertion sheet for measuring internal temperature distribution of fuel cell

Abstract

The invention discloses an insertion sheet for measuring the internal temperature distribution of a fuel cell, which is a device for measuring the internal temperature distribution of a fuel cell. The insertion sheet comprises a stainless steel substrate with gold plated on two sides, a plurality of leak seams and ribs are arranged on the substrate, the size and the shape of the leak seams and the ribs are same with those of grooves and ridges on a flow field plate of the fuel cell to be measured, and the positions mutually correspond. The entire surfaces of the ribs between the leak seams are provided with a film thermocouple which is formed by plating four films through evaporation by using a vacuum plating technology. An outgoing line of a measuring head of the film thermocouple extends to the edge of the substrate by using a printed circuit method and is provided with a standard wiring port connected with an external circuit on the edge of the substrate. The insertion sheet for measuring the internal transient temperature distribution of the fuel cell is completely independent of an object to be measured, has a simple structure and a wide use range, is accurate for measurement and can be used for the online measurement of the internal temperature distribution situation of the fuel cell.

Description

technical field [0001] The invention belongs to an insert piece for measuring the internal temperature distribution of a fuel cell, and relates to the measurement of the internal temperature distribution of a fuel cell, in particular to a measuring device for a transient temperature distribution. Background technique [0002] The existing temperature distribution test method inside the fuel cell takes a long time to measure, has a large volume and a large heat capacity, and has a hysteresis phenomenon in response to changing temperature, which cannot meet the needs of high transient temperature measurement, and some measurement methods need to be changed Due to the structure of the fuel cell itself, thin-film thermocouples are increasingly valued by researchers at home and abroad because of their short temperature measurement time, high accuracy, small heat capacity, and ability to measure transient temperature changes. [0003] Due to the structure of the fuel cell itself, ...

AI Technical Summary

Problems solved by technology

[0009] 1. The processing is complicated, and some temperature measuring components cannot be completely independent of the fuel cell under test;

[0010] 2. It is necessary to change the original structure of the fuel cell, and it is necessary to use a special transparent material that can pass through infrared radiation, or a specially processed flow field plate, so the experimental results obtained cannot be compared with the same type of fuel cell;

[0011] 3. The sensitivity and precision of the measuring element are low;

[0012] 4. It is inconvenient to use, the preparation work is cumbersome, and it is not easy to disassemble and assemble the battery;

[0013] 5. Not universally applicable to all types of fuel cells

[0014] In summary, due to the uneven and transient temperature distribution in the fuel cell, there is no simple and effective method to accurately and quickly measure the temperature distribution inside the fuel cell.

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