Dear all,
My name is Danny Gelman co-founder of InEnSto, a company developing Aluminum-air battery technology.
We are currently working with your AG3 cell casings in order to implement our technology in this specific size of batteries. Using the standard MTI crimping machine model number MSK-160E, (http://www.mtixtl.com/PressureAdjustableElectricCrimperforCR20XXButtonCells-MSK-160E.aspx
) we are unable to produce adequate crimping, even without our active materials. Applying the tree components of the cell, figure attached - (7.75D x 3.4H mm) with O-rings for Battery Research procured from MTI http://www.mtixtl.com/Steel-AG3/312buttoncellcases7.75Dx3.4Hmm-EQ-AG3-CASE.aspx, the results are problematic, due to our lack of understanding on the advised procedure of cell assembly. One of the issues arise from the proper O-ring placement in the bottom case, where no obvious mechanical stopper for the O-ring is evident. Could you please provide us a best known by you assembly procedure or even better an explanation video to show us what is wrong with our AG3 casing implementation?
Thank you in advance,
Danny
Danny,
I am using the same crimping machine. Are you using the proper die for crimping? This machine usually design for crimping coin cells like CR 2032 and so forth. You need to have a proper die for your AG3 cells. Also, how much pressure are you applying? Based on my experience for coin cells, you need to adjust the knob to have at least 8 or more on the pressure display.
Amir,
Thank you Amir,
We have a proper die for AG3 cells (different from 2032 die), and still we didn't menage to properly crimp our aluminum air battery cells . Did you had any experience of crimping any metal air batteries?
Thank you,
Danny
Hi Danny,
I have a lot experience with CR2032 type coin cells with same facility, however, they are a little bit different with the AG3 type. So the followings are just some of my personal suggestions to try.
From my understanding that your problem of "no enough crimping" means the cell can be crimped but not enough to ensure a good sealing, right?
1. As Amir asked, what's your crimping pressure? If you don't have enough pressure, definitely the crimping will not good. If you already reached relatively high pressure, try to hold at that pressure for 1-2 s. If you even cannot reach a high pressure, no matter how you push the crimping machine, that means the height of the die is not proper, you'd better try to increase the height of the die.
2. For our CR2032 cells, we need to add enough spacers based on different thickness of all the components in the cell to ensure a good contact between the electrode and the cell. If no enough spacers in the cell, first the contact will be bad, and you can easily over crimping the cell at high pressure.
3. Just call MTI for support.
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