Chademo Controller Development

[Isaac96]

Great. Code is up on Github along with connection schematic and parts list. https://github.com/Isaac96/CHAdeMOSoftware
I'll also document it on my website (which ends up being one of the first few hits for DIY CHAdeMO).
At the moment I am adding my BMS protocol, that version will go in a branch on my repo.

[larsrengersen]

Awesome guys! Thanks for your efforts.
Is there some website "I'll buy you a beer" where you can order from anywhere and have a beer delivered locally
Just kidding, but I do would like to buy you guys a beer, but then you'll have to get it yourself. I'll send you a PM for a way to transfer some beer budget. Unfortunately a one-off extra Patreon support is not possible.

Regarding the ISA shuts, I'd be happy to facilitate that. I am in the process of setting up a GDPR compliant webshop for 'special' EV parts already with tax and shipping processes automated. I'll look for a source and can stock some. Once ready, there will be an openinverter.org discount of course. Assuming you agree if I facilitate that, please let me know.

[Jack Bauer]

Sounds great. As far as I know they have to be ordered directly :
https://www.isabellenhuette.de/en/preci ... vt-series/

[Kevin Sharpe]

I'll look for a source and can stock some.

I'll give you the contact at ISA

[jon volk]

Sounds great. As far as I know they have to be ordered directly :
https://www.isabellenhuette.de/en/preci ... vt-series/

There's a US based distributor that sells them.
https://www.testco-inc.com/isascale/IVT ... CAN1-12-24

[Kevin Sharpe]

There's a US based distributor that sells them.

That's good news but $224 is retail pricing from the manufacturer... hopefully we can get someone to provide them at much more aggressive pricing

[JaniK]

Great work and good news Isaac96!

Damien, The golden version that just works and can be ordered from webshop with/without isa shunt would be nice.

Thanks to all for your hard work and efforts!

[Jack Bauer]

I will sell a kit but not with the isa shunt. That is for someone else to do.

[Isaac96]

I sent this to @larsrengersen but I'll just paste it here:

Since your BMS has dynamic current and voltage limits, you'll need to use the chademo.setTargetAmperage() and chademo.setTargetVoltage() functions if the limits change.

I'll fix CapKWH - for some reason I didn't have that match the others. CapKWH is the EEPROM name for packSizeKWH.
packSizeKWH is part of the CHAdeMO protocol, I think it allows the station to 'budget' time to charge.

settings.kiloWattHours was part of the old SOC monitor, which was remarkably complicated. It is also sent to the EVSE. I suppose there's no reason to set it to packSizeKWH, so that will also change.

New variables added - chargeAmpHours and chargeKilowattHours replace settings.ampHours and charge.kilowattHours, no longer going in EEPROM (less wear and tear).

resetChargeState and checkChargingState are both gone, now if the controller is on and not charging the sensor will be restarted.

v0.7 going up in a few minutes, with simplifications and improvements. Thanks Lars for the code review and input!

-Isaac

EDIT 0.7 committed to an alpha branch, I haven't tested it yet. When tested I will pull it into the main. Still learning git...

[szczur333]

is it possible to use this if i have bms without can?
I have simple ebike with 72(84V) battery and want to charge it via chademo by 30-50A

[Kevin Sharpe]

I have simple ebike with 72(84V) battery and want to charge it via chademo by 30-50A

Many CHAdeMO chargers do not support batteries below ~200V

[szczur333]

I have simple ebike with 72(84V) battery and want to charge it via chademo by 30-50A

Many CHAdeMO chargers do not support batteries below ~200V

I know, but we have new chargers here, and some guy - charge 52V battery pack without problem

[Jack Bauer]

Github updated :
https://github.com/damienmaguire/Chadem ... Controller

[muehlpower]

Are you sure about R19 in the ISA CAN version? Doesn't it have to be between CAN H and CAN L ?

[Jack Bauer]

Wow I am a moron! Nice catch. Updated.

[IanG]

Any idea when these will be available to purchase?

[Jack Bauer]

As soon as they arrive in to me from JLCPCB. around 2 weeks.

[Sebuś]

I have CHAdeMO (PCB v1). I produced them quite a long time ago. Does v1 work? I want to install them in Fluence (equivalent to Leaf gen.1).
I need 15kW-20kW charging max. Can version v1 be used for this? What are the problems and why was V2 created?

[Jack Bauer]

Had a bit of delay as JLCPCB were out of stock on the SAM3 processor. Back in stock now today and boards ordered.

This version uses the isa shunt for current and voltage sensing.

[Isaac96]

I have CHAdeMO (PCB v1). I produced them quite a long time ago. Does v1 work? I want to install them in Fluence (equivalent to Leaf gen.1).
I need 15kW-20kW charging max. Can version v1 be used for this? What are the problems and why was V2 created?

As Damien said, V2 uses the ISA shunt to deal with HV measurement - this improves accuracy, precision and safety (no silly HV wires running into the mainboard).
V2 also has a SAM3X processor - far more space for whatever extra functions are needed. So the V2 software will not work with V1. The old v1 software might do the job for you.

Had a bit of delay as JLCPCB were out of stock on the SAM3 processor. Back in stock now today and boards ordered.

Great!!!

-Isaac

[Jack Bauer]

In production at JLC.

[Isaac96]

Great! I'll be testing the latest code revision (0.7) as soon as I get my coolant system back together, then that will be published.

[Jack Bauer]

Boards just arrived from JLC. Once tested will be available in the webshop.

[Jack Bauer]

Looking good on the bench. Pinout attached.

[JaniK]

Nice, You will need to send one of these here too

What is the best place to source the ISA shunt?
Was there someone who sourced a bunch of them?