Recent content by msebold

Definitely a very pretty glow. Does it double as a nightlight? :-)

Anybody? Don't be shy.

Hi. After some exchange with others on this topic I built my own home-made load tester using bailing wire. (BTW, it worked fine and my 18650 cell modules performed wonderfully!). However, I was wondering if any of you have tried using a carbon pile load tester. They are not that expensive...

Hey, thanks much for the explanation kdog, and thanks to all other for your comments. I think I get it now. Cost-effective test load achieved by controlled short and measured with watt meter. Sorry, but I gotta go now to buy a watt meter and make sure my fire extinguisher is fully charged. :-)

Okay, maybe I don't need SUCH precise load measurements. But you get what I'm trying to do, right? Put a heavy test load on each module to test the contacts? I don't want to spend a gazillion dollars on equipment. But I'm also a little leery on the idea of load testing by using a wire to...

I would like to know with a reasonable level of accuracy the exact load I am placing on the cells. So how do I know that the 60mOhm copper wire or the MIG welding wire is only placing a 60 (or 80) amp load on the module?

Interesting idea (to a novice like me). But where do I get 60mOhm copper wire and how do I verify that I'm placing only a 60 (or 80) amp load on the cells? Fires tend to scare me.

Thanks, but I need a test draw at around 4 volts, not 82 volts. Right now I seek to test each 3.7 volt module, not the completed pack in a series.

Actually, a constant, accurate current is important to me in placing a test load on these 3.7 volt, 8-cell modules. 1. First, I want an accurate 60 amp load to mimic the maximum draw they will experience via my ebike controller (60 amps). I want to make the the copper compression contacts I am...

Thanks. But I know just enough about electrical circuitry that the mention of an IGBT makes my teeth hurt.

I would love some advice on testing equipment. I am a novice. I am building an 82V 18650 battery pack that is made from 22 individual 8-cell, no-weld, parallel clusters I am constructing. The 18650 cells are NCR18650GA cells each putting out 10 amps. The 22 clusters will then be hooked up in...

Hi. You list your bus bars as being .308 (inches wide) by .010 (inches thick?). Is it possible that you meant to list the thickness as .10 inches (or a bit more than 1/16 inch thick)? To me that kind of looks more like the thickness portrayed in your pics. Also, any suggestions on where I...

Thanks for the info. Yesterday, someone pointed me to some similar heat shrink tubing available on AliExpress, which I purchased. Unfortunately, the wrap I found, as well as that posted for sale on your Ebay links are very thin-walled, and probably will require at least three layers to provide...

Hi. I built a triangle-shaped glue-pack 18650 battery pack, but I'm having trouble finding a supplier of the size of PVC heat shrink wrap I need. Considering the dimensions of my pack I need PVC heat shrink wrap that is 370-400 mm wide laying flat. The desired thickness could be anywhere from...

Thanks Syonyk. I appreciate the input regarding the copper welding tips. I didn't think they looked worn out. They just don't seem to have the same "zap" they had 100 welds ago. Perhaps I do have something wrong internally. I'll try to check it out. BTW I am using pure nickel tape, not...