Compression of pouch cells, info/data

[john61ct]

Sure but when you want major kWh fiddling with hundreds of itty bitty cells is a pain.

And honestly, all you need is metal plate and some strapping or threaded rods, really NBD.

Especially starting with the hard-cased prismatics like your Winstons.

 

[john61ct]

My error in using "puffing" ... as puffing is a NO NO. What i should have said is "expansion" as it relates to this post

Nope, puffing is just greater expansion than should normally be allowed.

Just prevent it is the bottom line, no rocket science needed unless we're talking some well-funded mission critical scientific or corporate project.

 

[flippy]

Sure but when you want major kWh fiddling with hundreds of itty bitty cells is a pain.
And honestly, all you need is metal plate and some strapping or threaded rods, really NBD.
Especially starting with the hard-cased prismatics like your Winstons.

if your packs are getting big then the compression also gets to be a pain to prevent the side plates from bulging. you need thicc plates or extra bars to strengthen it. no to mention keeping everything together in an already big and heavy package.
if you have a solid process its not much harder then welding blocks of 18650 or bigger cells together. especially if weight, size and cost is a factor. dont forget that 18650 is still the cheapest per kWh. for most people here labour cost is not really a factor so the time factor does not really apply. you still end up with a smaller, cheaper and lighter pack when you did with lifepo or worse: LTO.