Recent content by OverkillSolar

very slow

no, but also yes. If you set up a serial port bridge over wifi you can connect to the desktop app wirelessly. An esp32 on each end would do it and the library to program them should be common. There might also be a premade solution for a wireless UART serial link. Lots of hits...

Must've had wax in my ears. What was the question?

If you want to see charge and discharge current separately you will need 2 external shunts, otherwise it all adds up in the bus bars before the BMS has a chance to measure it.

The idle power draw of the 4s BMS is less than 5ma The discharge shutoff switch prevents system loads from discharging the battery. Unplugging the balance wires will take the standby power to zero but the cells still have a self discharge rate.

The 100a rating is at 100% duty cycle. I have tested every model at multiples of the rated current. Heat buildup is the limiting factor. It's a common port, so simultaneous charging and discharging would be averaged out in the external bus bars, and the BMS/battery would see the sum of the...

Accurate.

I have to point out that the cells can not do this on their own, this only makes sense if there is a large active balancer connected. Anyway, if this is happening, you need to top balance the cells, or the cells are damaged and mismatched.

The 16s 100a BMS (available starting next week) has 20 Pairs of FETs, each rated 120a per the datasheet: https://datasheet.lcsc.com/szlcsc/1912111437_CRMICRO-CRSS042N10N_C410926.pdf I have not seen any of these fail closed under normal loads. (speaking about all the models) I tested a sample of...

aww thanks guys Will has not reviewed my BMS again because I can't supply the order volume that happens when he says my name on youtube. (I've asked him not to) This will change soon as I have a few projects wrapping up that will let me test and calibrate the BMSs way more efficiently, and I'm...

woot

I don't know what that connection is for. On the units that I order, that circuit is not even populated.

I think I could do it with 2 hole patterns, wide and narrow.

Wow that looks like crap.

It's the same one.