In response to global climate change, hydrogen energy, which is recognized as clean and efficient, plays an important role.
Making hydrogen into batteries that store energy - hydrogen fuel cells have great demand and application prospects in new energy vehicles, factories and residential power supply.
A hydrogen fuel cell is composed of multiple fuel cell units stacked in series.That is, the bipolar plates and the membrane electrode MEA are alternately stacked, and seals are embedded between the monomers. They are pressed by the front and rear end plates and then tightened with screws.
Figure 1-Hydrogen fuel cell composition (picture from the Internet)
hydrogen fuel cellbipolar plate
As can be seen from the above, the bipolar plate is the "skeleton" of the stack, but it not only supports the stack, but also plays a role in collecting current, increasing channels for coolant, and dividing oxidants and reducing agents.
Figure 2-Bipolar plate (picture from the Internet)
Therefore, as the "skeleton" of the hydrogen fuel cell, the bipolar plate needs to pay special attention to its sealing, also called air tightness.
answer:
Ensure that the air tightness of the monomer is qualified to ensure that each bipolar plate assembled into a finished product is qualified.
Not only testing the air tightness of the stack, but also testing the cathode plate, anode plate and bipolar plate separately!
Bipolar plate composition and parts to be tested
The bipolar plate is composed of an anode side sealing ring, anode metal plate, cathode metal plate, welding seam, and cathode sealing ring.
Figure 3 - Illustration of the composition of a bipolar plate (picture sourced from the Internet)
Part to be tested
The sealing performance of the shell material/the sealing performance of the single sealing ring after veneer processing;
Test the sealing performance after welding of cathode and anode;
Multiple bipolar plates and membrane electrodes are assembled together to measure the air tightness of the water channel, oxygen channel, and liquid cooling channel.
hydrogen fuel cell
Bipolar plate air tightness testing solution
Recommended instruments: Hirays HC classic series testing instruments
Instructions for use: Different molds are formulated according to the bipolar plate components and overall structure.
Install the mold on the customized tooling, and then place the product to be tested into the mold.
Select the program that has been set to start testing.The instrument will definitely determine whether the product under test is OK or NG according to the set program.
Test process: Clamping → Start → Stabilize voltage → Test → Deflate → Remove the product.
Inspection work before mass inspection
What should a complete detection system have?
As shown below:
1. Factory end: air compressor, gas storage tank, filter, refrigeration dryer, adsorption dryer, pipeline;
2. Detection end:Air tightness detectorinstruments, testing tooling, and customized testing molds.
Haris delivery capabilities:
Instruments and materials, 200-300 sets are always available;
Perfect quality control;
Trained assemblers:
Production capacity: 8 units/person/day;
Conventional instruments, 15 units are always in stock;
Hirays HC classic series multi-channel detection instruments
The delivery time is the fastest among peers, and it only takes 0-1 day to deliver;
Improve operator satisfaction with the working environment;
Air tightness testing equipmentStable and accurate, reducing the labor intensity of factory debugging personnel;
It can provide preliminary trial production verification, which can quickly improve the production process and speed up the project progress;
Worry-free after-sales service and 24-month warranty;
Compared with foreign counterparts, more competitive prices ensure greater returns for the overall project;
Local technical support, door-to-door service within 4 hours within the province, and door-to-door service within 4 hours for partners outside the province.
