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After purchased I noticed My AliBaba seller is representing EVE304 Cells as “A-“ ! NOTE this misrepresentation!! After researching I’m assuming Their - means “minus “, however EVE only classification is A or B!! Guess I’ll make them eat it if not a true QR code for A grade. Always use PAYPAL...

Good information and advice.?

I would think an appropriate test would be the resistance after torquing them down. All should be equal to each other equal busbars.

Do you think it’s in the best interest of a Chinese manufacturer to have his product last as long as possible? Well if you do I have a fortune cookie factory I want to sell you so that all your dreams can come true.

I’m of the belief that the corners of a prismatic cell normally Keep their shape and any bulging comes from the large flat sides, the weakest point, which would probably be the center of the cell. By using a full spacer pad, any expansion will have A place of resistance. I chose not to use a...

LIQUID SILICONE https://www.applerubber.com/hot-topics-for-engineers/everything-you-need-to-know-about-liquid-silicone-rubber/

Thank you for your support ?. I’m following manufacture data regarding prismatic cell compression increases cycle life. I’m following manufacture testing data on liquid silicone foam spacers. (Which will at minimum reduce heat transfer between cells and contact damage in my mobile application)...

DYISOLAR on YouTube does cover EV charge. I’m paying $6/gal gasoline… might be $10 very soon, and for the Foreseeable future. I would rather have more than I need than need more than I have. Besides, larger busbars have less resistance, therefore less heat.

Oh yeah by the way, putting the pads between each separate the cells will make the compression quite easy to calculate. Squeeze the 50% SOC pack to approximately 3.2mm , plus or minus. This provides approx 7psi evenly between the cells. Now wherever the weakest point (generally center of the...

Well I hope I can use them!! As they are special order from a solar liquid neoprene foam manufacturer in China, Who Assured me their compression force will continue to perform under extreme temperature range and long after the life of my EVE304 battery packs. Check with me in 15 years and I...

Well for the sake of argument, let us say that you have 3500 amp hours at 48 V where you want to charge up a tesla on tier 3, and that’s going to run for an hour maybe more, and all the while he’s certainly like to continue to run all of your appliances, and your two air conditioners in your...

EVE provide 2mm thickness by 20mm for 300ah batteries. I do not believe everything that a Chinese manufacturer tells me, for instance 2000 lm flashlight? Some of them are actually not as bright as a 500 lumes. Check it out for yourself...

My EVE304 are perfectly flat and I’m padding with 4.5mm liquid silicone foam pads which are intended to stay within the recommended compression at all SOC. Also If you search copper amps carrying capacity, I concluded their factory, or expensive special order flex, busbars are inadequate. I’m...

Either way, allowing expansion by limiting within specifications seems to be preferable to longevity.

Be sure to use long lasting liquid silicone foam between them before compressing.

Proper liquid foam pads for cell spacers does the trick! Keeping compression during cycling between 8psi and 17psi.

Do not lay prismatic cells on their sides!

I would not even put cells on flat sides. Search YouTube

How can one mechanicaly achieve 12psi! I have not found an answer!!. Therefore I have decided to use liquid neoprene pads which have a compression ratio 25% to 75% which are rated at a psi of 7 to 15 respectively. The only thing I can figure is if I start at 30%SOC with a 4 mm separators and I...

Yes shunt

I’m really not sure why you would double up on the BMS’s? I think it should be a spare, should be a spare… to have a spare in case you need a spare!….and why confuse the electronics on either one of them? Am I missing something here?

Sounds like what I’m doing, TWO DALY 200amp common port. however I’m still trying to figure out The best size DC circuit breaker for each of the battery banks. I will be using a 30 K inverter with dual post input, 2/0 welding cables ( one for each 16 S) suggested breakers? ??

Tape will hold them together quite well however they do not allow for proper compression if your goal is to achieve longevity

Please read my other replies in this post for a better understanding of the type of material that I have decided to use through extensive research

Batteries cells naturally compress and expand into environment and state of charge. According to the manufacturers life is extended if they are compressed at approximately seven psi and never exceed approximately 17 psi.

Maybe as insulation between cells. It’s my understanding that what you’re looking for is Neoprene that when place between the 30%SOC cells and compressed its COMPRESSED thickness @25% will provide approximately seven psi. Further when the batteries expand each approx .5mm, the resulting...

So…What I am gathering is if I had 100 rods around them I would torque them each to 6.6 pounds…Somehow I’m escaping the physical logic of that force equation!

I have 16 Eve 304 cells, I intend to connect each cell consisting of the maximum rating of 300 A, even though 200 amp It’s probably what I will be max. Busbar capacity research as indicated that the bus bars which are provided by the manufacturer will handle only around 100A continuous...

Okay i’m thinking of putting three on one side three on the other side nuts and washers on both of them the question is i if I use springs how can I achieve the proper compression?

Thanks!!! but I’m guessing if I put together four or eight cells at 30%SOC with the 4mm/25% foam as indicated by you, and torque ALL my nuts on the compressing rods until the spacing between the cells are 3mm, then I theoretically should be good to go! Thanks hope I have it correct now ?

I thought EVE304 expanded 1mm (.05mm per side), when placed next to another cell , then each .05 movement upon each side of spacer comes into play. Therefore there’s.1mm of action on each spacer. I agree about using a different one, as the diffusion will be different depending upon thickness and...

Okay let us start at point x. Say 4 cells with 3/16 (0.1875” or for argument sake say 4.5mm) foam. That’s 5 pieces total. Now each cell expands.5mm per side, resulting in 1 mm “expansion pressure” between the cell’s upon the foam, and.5mm “expansion pressure “ against the aluminum bookends...

4” of given material, compressed to 3” (25%) is standard rating…. (https://www.foambymail.com/blog/understanding-foam-firmness-and-compression-strength-and-applying-the-values-to-your-needs/) So how can we possibly convert that into required 3/8 foam specifications?

Putting a compressible mat between the cells sounds like a really good idea but once again I’m confused with your decision the specs on the silicone indicates they are 12 pounds per square foot it’s my understanding that most compression is at 12 psi (8-17 psi) any guidance on your choice may...