Search results

Great. Will take a look. Definitely want something like this rather than the 3-d printed option. Thanks!

So, been making progress, but of course more slowly than I want. Here's the steel rack I welded up to hold the modules. The red paint is an electrically-insulating varnish that also blocks moisture/prevents rust - I'm not sure how abrasion resistant it is, though. Here's a close-up of the...

Thanks. Yes, I'd be interested to see your buses installed. So, I was charging the module using a 10 amp charger when I saw the difference. My description of the 20 mV drop needs correction, though. The 20 mV is the difference in cell group #4's voltage as compared with the rest of the cell...

Update here . . . been making progress: 1st module completed for testing, found voltage drop of ~.02V in cell group #4, which is right at the connection I made between the 4s block and the 10s block. Attached 2/0 cable and found that the problem disappeared, so now I'll double up my copper bus...

Nice set-up. Must have taken some time to get those 18650's assembled. I took your cue and ordered enough Selterm 2/0 lugs to do the whole battery bank and will keep an eye out now for the welding wire to go on sale. I've still got a few things I can work on in the meantime. Just contacted my...

Charger arrived. Looks good, but I am still waiting for the postal service to deliver the BMS (went with REC) so I can test out charging. Planning to use 4x 12V headlight bulbs in series for the drain test. I'm wondering about cabling now and am looking for advice. I'm likely to go with 2/0 for...

OK, thanks OGITC and 400bird. I'll look into these two options. Was trying to work with what I have until I get the inverter/charger, but no sense in cheaping out over this and wrecking something. Feedback appreciated. [Edit: just ordered the unit on the second of OGITC's 2 links, Model: YL600...

I've started to balance one of my 14s3p modules by 1. recording the voltages of all 14 cell groups and then 2. using a Battgo charger to bring the slightly lower cell groups up. Once I've got all cell groups to within 10mV (.01V), I'm planning to hook up a REC BMS that's on its way now. I've...

OK, thanks. I'll find this out. For framing inspections, my AHJ tends to use older codes rather than newer, but it seems important that I get clear on the version of the electrical code and then get everthing installed and inspected before they upgrade :). Appreciate the tip.

Yes, good point. I'm not sure either, but there are white globs of some type of rubber insulator on the board. I'll pull them off when I get a chance and take a closer look. Here's another pic.

Excellent! Sounds like an ideal pack. In terms of permitting, I'm also planning to pull a permit, but have no idea what kind of regulation my inspector will be following to check the battery. All he told me is that all components have to be certified, but I'm not sure what that means when it...

Thanks 400bird. Had to go back to paying work recently, so slowed down on the build, but am still chipping away. Seems like there's a shortage of a bunch of things these days. Didn't know about the full Bolt pack shortage. I'm guessing you are checking salvage yards through...

OK, thanks. I'll post torque spec after I have the chance to measure it from my one untouched pack - for anyone with the same module. [Edit: torque for the threaded rods is somewhere around 60 in. lbs. I am guessing the exact spec will be in the chevy mechanic's manual. Does anyone know if the...

Thanks much for this feedback and for the wire-gauge link. I will take your example and use red and black colouring for the shrink wrap on the bus bars. Maybe I'll also print up and post your #1 rule inside the cabinet, once I've got that sorted. I'm constantly aware that I could be doing...

Thank you for this tip. I watched D. Poz compress these cells in a video where he makes a module from individual cells, but I had no idea why. I still have one original module that I've not touched, and will measure torque on the bolts before disassembling so when I re-torque the...

Thanks for this. The thin wire test is a great idea and I will use it - makes me wonder how many other important safety procedures there are as I slowly assemble the system . . . but that for another day. I am now half way through the module 'surgery' to produce the (3x) 14s3p modules from...

Thanks OGITC, That's v. helpful. I understand the limitation of having 14s9p will be that the whole battery is down for any servicing. In my case, I think I am willing to take that risk in order to be able to have the benefit of only one BMS. I'm going to take a look at the Batrium BMS this...

CONFIGURATION QUESTION: I read through this .pdf by the Orion people called Strings, Parallel Cells, and Parallel Strings (att.) that an Orion distributor sent to me. Not sure what BMS I'm going to get yet, but this document cautions strongly against parallel strings for a number of reasons...

Today, I tried to pin-out the 10s3p pack and found most, but not all of the bus bar points that (I think) I need to wire a BMS. (Floyd, you were right that the 10s3p pack was easier to pin-out. Thanks for the suggestion.) Next step for me is figuring out exactly what voltage sense/balance leads...

Understood. Thanks.(y)