To buy this module kit please visit https://jag35.com/collections/pcb-based-products/products/bms-module-kit
For battery Modules https://jag35.com/collections/lithium-batteries
For battery Modules https://jag35.com/collections/lithium-batteries
DIY Powerwall
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I finally finished it. After purchasing the tools needed and almost a year of "I'll get arount to it." It is together. Thank you Jehu for your "getting around to it" videos. I am sure that your time is hard to manage too.
There is also a thermistor soldered into the board – should I cut it off? There is also a black shield on the back of the BMS module… leave it on or remove it?
Ordered the kit. The BMS modules are different from what is pictured. They have a hole for C- but no hole for B- just a pad.
7-8min, If you act ually tin the wires for all the BMS balance cables first it will 1 prevent any stray wires from sticking up as you are trying to bend them in there, and 2 make them solder easier once through.. and I don't see why you don't just unplug it from the BMS, stick it through, solder, then plug back in lol i see other messages… You soldering savage… hahaha really tho tining wires has its purpose, and anyone who solders alot will tell you it is the way to go haha.. You go through all this to get these boards and parts sourced and you don't know to tin wires.. or just can't be bothered? I dunno, but it would help the users that are trying to learn from you, regarless of if its carelessness or ignorance, your buyers will have a better time with it you teach them to tin things first.
What is the configuration for the BMS boards? How many cells does each BMS board monitor? I eventually want to buy the system you offer but don't know enough about the configuration to get started.
is this bms in parallel?? or series?
I would love to see a new version of these packs. Tesla has been upgrading to 21700 batteries in many of their battery packs, these batteries have better energy density, and produce lower heat at 1C continuous discharge, meaning they're good for more cycles under appropriate conditions. One downside is these batteries are slightly larger (slightly more costly too), but you'd have ~500Wh for a pack containing 5 boards that each house 7 batteries in series like you make in these videos, which would still run at 25.2 V nominal. This would be good for builds that require more power storage, or need to sustain higher loads, or have increased longevity in mind.
Another note, if you ran Samsung 48Gs in a 21700 set up, you'd produce very similar current (48 A, compared to 50 A), but store 600Wh in a fully configured pack, compared to 400Wh using the Panasonic NCR 18650BD.
You should tin the wires and connector contacts before soldering them together. The solder connection will last longer, make better contact, and will look nicer (though no one will notice once you cover it with heat shrink tubing)
Got it. Can I buy 1 Battery PCB kit. Before I go full speed and buy 25 I want to have 1 to use for testing, etc.?
Ok I ordered one of your kits, but what about charging? What voltage does the BMS take? Do have recommend (mains) power supply?
When are the newest PCB boards that are already populated going to be available? Thanks Jehu!
jehu, the link to my the kit is down