Search results

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.

In Will's latest video he pulled this board out of the PowerBlock battery that had all of the bus bars and balance wires integrated. Good idea or no? If I had this made for connecting my BMSs to the 280ah cells would you buy it? I can see pros and cons to this design. Pro: neatly packaged...

its an input!

A new module from my stock should work. I had this argument with the factory in the beginning, that the antenna needs to be the correct length to work properly and its already printed on the circuit board. They started cutting the wires off, which was better, and eventually switched to a new...

1. This app was designed for electric scooters. It's trying to calculate the driving range. 2. On the new BMS I checked, hardware overcurrent is set to 440 amps, and hardware short circuit protection is set to 1780 amps. I think these have been different in other shipments because I...

Should work. Use a light bulb for the resistor, then you can see when the caps are charged.

I paid a writer/programmer to create the entire manual from scratch

The wires that they use at the factory are labeled: "10AWG 200c 600v VW-1 TYPE TV-3 SILICONE RUBBER I A 200c 600V FT2" When I do 8ga wires they are rated 105c.

What I have observed: (speaking about a 12v system) I test every BMS with a 4 cell battery and a 3500w pure sine inverter, so I've had the chance to test this from every angle. 1. If the BMS if active but not connected to the inverter, and the inverter caps are discharged, then connecting the...

I am confident that the BMSs I supply can run at the rated current indefinitely. If I thought otherwise I would have under rated them.

no problem but be gentle with the connector- it has a locking tab, don't just pull.

Amazon takes a percentage of gross sales, and pays affiliates a portion of that. The payout used to be generous, now not so much. I have an affiliate link tracker on my website that records purchases made via affiliate links, then I pay the affiliate directly. Its a wash for me.

I replaced the Amazon Tax with the Will Prowse tax. Most of you guys use his affiliate links. At least it isn't all going to Bezos, right?

No extra discounts for now, as I am already struggling to keep up with the number of orders (thank you BTW) In the future when I get over the hump I will do some special offers.

yes they can, and I also have 8s 100a BMSs available at this time.

How are they going to undercut me if I already sell their original design Oh you mean the american version. IDK, we will see.

Noooooo check OverkillSolar.com The center wire does have copper around it. The 120a 3-wire version is a kind of afterthought to the original design. I am trying to have them tweak the design to better suit our needs. Better connections, more wire size options, more FETs. Im going to have to...

I always crimp them into a single 6ga copper lug.

You can use any TTL com port to program it with the desktop application, downloadable from my website. Pinout is labeled on the circuit board.

this is what I could find: https://heltec-bms.com/

100a (2400w) although I definitely pulled 150 amps when I wasn’t paying attention