Recent content by MadMacks

I recently got a call from a friend that was building a small 12v battery and was having issues with getting it to work. There were a variety of issues that I helped him fix, but I noticed that he’d purchased bolts for his cell bus bars and hadn’t used studs with nuts. The bolts he was using...

200a @ 12v dc is 2400 watts 2400 watts x .9 (ac conversion loss) = 2,160 watts 2160 watts / 120v ac = 18 amps I should easily be able to run a tool that draws 15 to 20 amps when it kicks on, initial draw... My AIMs inverter is rated at 2500 watts run and 300% of that for 20 seconds at start...

So I now have the following... Basic Protection, 200 amps for 32 Seconds 2nd Level, 220 amps for 160 mS 3rd Level, 440 amps for 100 uS i will bump up the 2nd level time to higher values if those settings don't solve the problem. But I still very much doubt I have ever hit a 200 amp draw...ever...

Good question...but that's what I read originally... I may adjust the basic setting down actually...

Interestingly I got a FET Locked error after the write. I also got that error when I reread using the XiaoxiangBMS software. But it cleared when I closed and reread from the BMS.

I just did an update... original settings screenshot new settings

My new unit was set differently (see above)

So I am trying a couple of different settings... original settings 2nd Lvl Overcurrent 160amp, 8ms 3rd Lvl Overcurrent 440amp, 70us new 2nd Lvl Overcurrent 160amp, 320ms 3rd Lvl Overcurrent 440amp, 100us

I just downloaded it. Very nice. But I don't see any info on how to use those settings (other than playing around). Is there some explanation on optimal settings? Their manual doesn't reference anything.

FET based...I believe. can you elaborate on 2nd or 3rd level protection? I'm using the XiaoxiangBMS software but I also have the SmartBMSUtility app downloaded. I'll check that out...

I don't see a way to configure short circuit set up in the BMS other that using the discharge overcurrent setting. Everything else is identical. And yes, the initial surge on a motor startup can be high, but the advertising and settings for the BMS specifically say it can handle surges up to...

I have a JBD 4S 200 amp BMS (JBD-SP04S034-L4S-200A-H) that I recently installed as a replacement for a similar JBD 100 amp BMS because I was having issues in the winter when running my generator and charging and then having the sun come out and boost up the charge from my solar panels, tripping...

Ok. That’s nice if that’s what you have. But if you’re selling a BMS that can’t be set to above 0°c (according to the spec listed) then it’s really useless for anything but the cell type you mentioned. These are sold as LiFePO4 BMS units. I’ll load up the software and see if the range is really...

I just received a Jiabaida SP04S034 BMS with heat control, Bluetooth, and a few other options. I downloaded the factory spec sheet so I could better understand when the heat element attachment port gets triggered. The factory manual shows the following… This makes no sense to me. My...

Ok… With a little more investigation it’s now understandable…duh. The BMS board UART is VCC/TX/RX/GND at the pin port. The Bluetooth module uses the same wire pattern (and a rational color scheme of Red/White/White/Black) and draws power from the BMS. The UART to USB dongle uses the TX/RX/GND...