Probably useful to know the country?

A question, will the BMS report voltage for just 1 cell for testing purposes? It would be nice to have it setup spitting out CAN and then connect cells one by one and see the voltages show up on leaf spy.

I think you're writing it!

The BMS cannot limit anything, it only measures voltage and current and it will balance the cells 24/7 as long as it receives +12V on pin 5 (BAT) of the round connector, which is wired to pin 12 of the LB11 connector. Also, all 96 pairs of cells need to be plugged in obviously. The BMS will only co...

evcar wrote: ↑Fri Jan 17, 2020 6:11 am I 've attached the wiring diagram from the 2013 BMS that I used in my car.

Ok so this is a great start for wiring things up, although interestingly my LS11 connector has an extra wire that's not shown on this diagram on pin 11.

Ok, so anyone got a TLDR; for how to use the leaf BMS from a 40kWh pack? One arrived today, I suspect I'm going to have to do some digging. I've read a lot so far but nothing super conclusive for my tired brain. Can I just hook up 12V, Gnd, CanH and CanL and get data via a Bluetooth dongle and leafs...

Thanks, I think for the leaf BMS it needs to be broken at cell 48 for reasons I don't understand but also to avoid 'popping'. The single/double battery box (with a solid corridor above the prop) might be a good idea actually. It would protect all the cabling, keep the number of input and output conn...

You need to figure out which are the supply voltage pins, e.g. with a 50 mA current limited 5V supply. When a third pins spits out around 2.5V you've nailed it. Is this likely applicable to both sensors or just the LEM hall effect one? From the data sheet the LEM one is only suitable for 300V so no...

On another note, current sensors. Are they easy to reverse engineer? I've got my hands on 3, one from the Lexus UX300E pack and another 2 from a random contactor setup I bought for cheap one of which is a low voltage LEM one. I don't know the parameters for any of them but it'd be nice if I could re...

Oh and in addition, whilst perusing the lexus UX300E wiring diagram I noticed the safety service disconnect in the pack doesn't break the pack in two and instead just breaks the positive or negative (I can't remember which), which I found surprising. Anyway, if I can manage to mount the disconnect I...

So, whilst waiting on the 40kWh leaf BMS to turn up (that may not work due to split battery boxes and needing to extend cell tap lengths....) I've finally committed to a battery box design. I've got for a mirrored pair either side of the prop shaft. To do this I can keep all the battery modules as t...

johu wrote: ↑Wed Apr 24, 2024 7:21 am Or cut a deal with Jacob, he's getting some made (if we only knew where he's from - please share your location )

Added my location (UK) and pmd Proton

Johu, I've also messaged you about the CPL and BOM files.

rstevens81 wrote: ↑Wed Apr 24, 2024 8:31 am i would recommend buying either a real simp bms or the newer evs-bms from toms suppliers.

Correct me if I'm wrong but simpbms is not for sale anywhere as far as I can tell.

No you're fine.

johu wrote: ↑Mon Apr 22, 2024 5:16 pm Let me know

I've pmd you

good news that things are all running smoothly! Acouple of Qs, people always talk about EVs cant tow, which you're obviously proving wrong, how does it effect the range? Also, do you have the Leaf BMS working in your conversion yet? I'm looking to implement it in mine but would be interested to see ...

So having abandoned killed the Lexus BMS I'm looking at the leaf BMS. As I understand the 24kWh, 30kWh and 40kWh BMS use the same Comms but the 40kWh can be a little finicky with regards to its existing wiring.... So it's really good news that I picked up a 40kWh BMS and a bunch of associated cablin...

pickmeup wrote: ↑Thu Mar 07, 2024 9:05 pm Hi all

We have a load of the bms modules removed from jag ipace packs.

Part number is J9D3-10C802-AB

They are of no use to us at work, but if anyone wants them let me know. No idea on price but they will be cheap.

Cheers
Garry

Do you still have these?

If the diodes fail, it means they are outside of their design operational window. Thus any other components on those sense lines will be hit hard by what ever voltage caused that failure. She if fubar, you never gotten it reverse engineered to a point where you understood what it was saying. So thi...

So... I'm cross posting this here as it might be a bit more widely read than my project thread.... I managed to blow up the BMS, or at least 7 diodes of the BMS. I'm looking to replace them and I've identified the parameters of the diodes with the help of a friend. The breakdown voltage is 8V and th...

So, I've been a bit quiet for a couple of reasons... Firstly, body work is slowly getting done. Secondly, I managed to blow up the BMS, or at least 7 diodes of the BMS. I'm looking to replace them and I've identified the parameters of the diodes with the help of a friend. The breakdown voltage is 8V...

I'm no coder, and someone will be along shortly to correct me but I believe it's all c/c++. Arduino IDE or similar should be all you need to look at the binaries (I think). Otherwise, the code is completely uploaded by the web interface, no other software required. Also, please do not endanger yours...

For info, I only can get it working with Pin35 to GND. Tried Pin35 to Pin 47, Tried Pin35 to 3.3v. So for now, only remote access is possible. Wifican is not detectable when Pin 35 pulled HIGH.. My wifi network and password have to be Inside of the "wifi_SSID" and "wifi_password"...

Aragorn wrote: ↑Mon Apr 15, 2024 12:38 pm Many switch mode PSU's i believe will happily accept DC on their input?

I'm by no means an expert but recall Johu suggesting that is the case

uhi22 wrote: ↑Mon Apr 15, 2024 9:24 am What about using two buck-boost converters back-to-back.

Definitely an interesting approach, so the buck boosters would work in tandem to act as a battery balancer?