What is "the sense" that you mentioned for tracking? More importantly, what does that have to do with this thread. Do you mean that the app can read from RS485 port on the junktec? Could you show us how you got that working, I have no idea about any about what you said or how it works...
Did you or do you top balance your cells? Some alligator clips would work but I dont have 64 of them available, not even 32 or even 2.
I noticed the terminals extend past the cell cases, so I am thinking about laying out a strip of aluminum foil and standing them up vertically in parallel on...
At full speed the motor will take 1500W from a 52V 16S battery pack. That would be around 35mph. That is constant when riding at top speed on pavement. For off road then the speed varies a lot.
I have been trying to measure the internal resistance with what I could rig together. I got a new...
My trusty old 20 year old digital multimeter said 16.12 miliohms, it was a decent quality meter from it's day with diode and current testing. I have a new $35 multimeter coming in the mail but that is a month away at best. I just got the 2nd one so I can calibrate my new bench power supply a...
It is a battery operated digital multimeter so that should be a DC measure, I don't have any fancy equip for AC resistance.
Those are some great tips, thanks doggy. When I touch the probes together they zero out so the wire resistance should be adjusted for already.
I will be discharging with...
Since you soldered on copper wire, a terminal block would be a good alternative to the copper bars.
https://www.aliexpress.com/item/1005002129345754.html
Received the cells and they are all identical and the date says 11/21 so these were stickered within 2 weeks or less of my ordering them. All at 3.23 volts give or take 0.01v. So they match very very well from their 1st appearance, the shipping took 6 weeks from my order date and the shipping...
I have a $20 little spot welder and 2mm nickle strips coming soon that I will modify for longevity and 32 33140 cells. I have to say, your experience spot welding them is definitely not welcomed news. I will still give it a go though!
How about tinning the copper really quickly with solder and then trying to spot weld it?
What kind of bus bars do you have that can 1,000a without having holes blown into them?
Today the price is 20% higher than the OP, $8 is now $10- at least with shipping to Canada anyways.
Nobody tried the $16 DIY spot welder on these? (note this needs a small resister mod and possible isolating the logic chips) https://www.aliexpress.com/item/32836588140.html
I saw a video...
You could use a shottky diode to force the energy in the battery to stay in the battery. This will also work for connecting 2 battery packs together that at different SOC, either for charging or for use in an Ebike or RV, etc.
Diode I ordered the SBR60A60CT these have one 30amp diode on each...
Why does it matter if the relay is attached to the BMS or if it is external? Makes no difference in terms of idle power consumption. There is no free lunch. If you dont want to use any current to run a relay, then this configuration on the Junctek is what you want, because there is none...
robby that post gave me a smile. Interesting theory for sure but slowing down youtube? What is next, forcing a 3 day delay on emails to make the post office less boring? By speeding up lectures offered on youtube or any other server that speeds at 1.25x or greater, if that creates more...
Wish I would have seen this before I ordered. The equivalent of 8 BattleBorn batteries $8k, was $360 shipped. It said DHL shipping which should have taken 1 week. Instead I got the 17track link.
Update: The $360 of batteries are on sale on Nov 11 for just $224 with free shipping. It is...