Figuring out how #pressure is distributed over the surface of a #pouch #cell in a jig can be a real challenge, but it is an important step in figuring out cell failure mode, or improving reproducibility. The CompreCell Pouch cell fixture applies a very uniform pressure to the sample, but up until now we had no good way of quantifying that in #operando.
I had the opportunity to use a Tekscan pressure mapping sensor to #visualize how the #force is distributed on to a pouch cell in the CompreCell Pouch. This was done in a collaboration with CMV Hoven GmbH, who came to rhd instruments GmbH & Co. KG to introduce the system and do some tests together.
We had three main goals with this small project:
1. To quantify how uniform the pressure distribution is in the CompreCell Pouch.
2. To verify that the TekScan setup works well together with the CompreCell Pouch + CompreDrive/CompreFrame system.
3. To measure some real-world data where we could follow the pressure distribution on a pouch cell in operando during cycling.
I'm happy to say that the tests were successful - the pressure mapping setup works very well together with both the CompreDrive and CompreFrame systems, and you can get some really useful additional data out of it. We cycled a #lithium #ion #battery in both constant volume and constant pressure mode, while mapping the pressure online. You can read all the details of the results in this new application note.
Also: CMV Hoven will be exhibiting at The Battery Show Europe in Stuttgart next week (Booth 4-B78), and the CompreFrame + CompreCell Pouch + TekScan pressure mapping sensor setup will be there for demonstration! So if you're attending, why not visit their booth and try out the system with your own hands!