Just had this email from a customer, thought i’d share:
“Hey buddy. Thought id let you know that your battery holders are explosive safe. Put a battery in backwards a thermal runaway came so quick I barely had time to get it in the protection bag I use but after explosion almost no damage to the unit.”
“Very cool though. Well that’s our way of saying very interesting. I had my foot on the bag and felt the explosion. Then I looked and the other one was ready to blow so i stomped on the bag ag but it just seemed to release pressure through a hole in the side. Very exciting though. Thank you for building a great product”
I wonder what cells your customer used? I had this happen at least 2 times due to not taking enough care but all that happened was a dead cell that wasn’t warmer
I have some off cuts which you guys can use as terminals by soldering wire to them. If you would ask for them in the note i could throw in some free of charge.
@DAddYE, you were asking about the files on the on the other forum. For 5P the files are already in my thingiverse link that agnius has shared above. Let me know if you need 4P. I’ll make that for you.
Not complicated at all. I have them all in terms of equations. Just change a single number. Also you can’t just edit the stl files because the walls are curved in a particular way to help with the compression.
I have two questions for you though:
2S3P or just 3P?
with the protrusions for mounting using dampening standoffs(like in the battery pack) or just plain ones seen above?
BTW, if you don’t already have 3P tabs, I can send you brand new ones. I have them from making 5P pack(8-5=3). Cost will be 3/8th of what 8P tabs cost.
No, @Agniusm is still working on them, I guess. I want my next build to have 12S4P 20700/21700, but need the tabs first. Agnius what’s the status of the tabs?
21700 hardware should be almost on time. I would estimate up to 2 weeks being late. First modules will be sold to order so expect some delay for building them. All print files fill be updated to my 18650 thingiverse profile.
agreed. but the performance is rly close, i would take the Samsung, because they are a bit cheaper.
Gotta do an update to my battery calc. 21700 are starting to get into the greenish zone.