Eltek/Volvo charger [SOLVED]

[boekel]

Does anyone know the type of the small 3 pin connector? 3mm pitch seems the same as Molex Micro-Fit but the lock is on the side...

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To answer myself: the Molex micro-fit fits fine, only the lock is on on the wide side instead of on the short side.

[tom91]

I created a simple bit of code to run on a Teensy 3.2

https://github.com/Tom-evnut/Eltek-Charger-Programming

This checks the canbus (at 500kbps) for an Eltek charger ID and then lists them out for your viewing pleasure.
Utilizing the menu you can set which ID to change to a New ID and then send the command with one simple request.

Currently the code works on the bench but not proven with an actual Eltek charger.

[tom91]

I successfully changed charger address from 1(default) to 2 which is shown in charger reports. Before charger would report on 0x301 address and now it uses 0x311!

do you have a canbus capture of you doing this as I cannot get this working.

[arber333]

I successfully changed charger address from 1(default) to 2 which is shown in charger reports. Before charger would report on 0x301 address and now it uses 0x311!

do you have a canbus capture of you doing this as I cannot get this working.

I have some photos, but it is not hard.
You just need to set your interrupt telegram ("sendCANframeURGENT" in my code) to send out trigger msg every 800ms (less than 1s). This will open Eltek to address change. Then you introduce a trigger message ("sendCANframeB") where you command the next address (or CAN speed change). I use a simple push button to gnd on specific pull_up pin for this.

After your attempt you need to disconnect charger from AC and DC voltage for changes to have effect.

See

[tom91]

I have some photos, but it is not hard.

Must be something to do with the chargers that Boekel is trying to change then.

My code does exactly same thing as yours even checked it on the bench with savvy can monitoring.

[arber333]

You could try changing protocol from oem to eltek with telegram 0...

[arber333]

I have some photos, but it is not hard.

Must be something to do with the chargers that Boekel is trying to change then.

My code does exactly same thing as yours even checked it on the bench with savvy can monitoring.

Mhm... i seem to remember i had problems using hex data values. Ie.: manual asks to send data value 1 through 4 for different function changes and i tried to send 0x04. But charger would not accept change.
Out of frustration i setup my DUE to just send intiger value 4.
And it worked! Must be additional protection from unintended changes?

[tom91]

It all of sudden decided to work. This is quite confusing but it finally has worked.

[urgiv]

Hello everyone

Just had Volvo 3KW Charger 31453939 is on the bench and I try to do some test

No battery yet

I can see CAN data on scope and on my CAN bus adapter but is only serial no of OBC transmitted every 1000ms CAN ID 0000308

I try enable output on CAN ID 00002FF but not working I cant see any feedback from OBC

Any ideas please ?

[urgiv]

HEUREKA WORKING - I can enable on bench without battery

[urgiv]

Please anyone have Technical specification EV PC 360/3000?

[arber333]

Please anyone have Technical specification EV PC 360/3000?

There are two documents posted one for installation and one for CAN protocol.
https://leafdriveblog.wordpress.com/201 ... w-charger/

Also there is IP20 version guide
https://www.rec-bms.com/datasheet/EltekGuideIP20.pdf

There is additional manual for paralleling Eltek chargers. Could be interesting and i will add that to my blog as well.

[urgiv]

Thank you but I am looking for this document but for EV PC 3603000 - contacted Eltec but send me a basic datasheet and installation ....

Technical specification EV PC 2203000 HE IP67 (B - 2090187 - 1 - 1).pdf

(279.6 KiB) Downloaded 254 times

[Zapatero]

Can someone tell me what an original Volvo Charger is set to? 500Kbps and the first answering message? Thanks

[arber333]

Can someone tell me what an original Volvo Charger is set to? 500Kbps and the first answering message? Thanks

Hm why do you need that? Do you have a charger that was locked? In that case you need to send it its PN code. I have to find the procedure i have it saved somewhere...

Otherwise normaly you first connect dc voltage, then ac voltage and you will see CAN reports streaming at 500kbaud at 100ms interval. Next you feed it 0x2FF telegram at 500ms and you hear the relay click.
BUT i have my chargers reprogramed to 100ms command

EDIT: Sorry i checked my records and charger reporting is in about 800ms!

[Zapatero]

As i'm now in posession of 4 Chargers i sold one. Obviousely its gonne be used to replace a broken one in a Volvo. So i wanted to doulbe check that it's gonna work in the OEM car. Thanks so much!

[arber333]

As i'm now in posession of 4 Chargers i sold one. Obviousely its gonne be used to replace a broken one in a Volvo. So i wanted to doulbe check that it's gonna work in the OEM car. Thanks so much!

The easiest way to see if charger is behaving is to connect DC and AC and observe its CAN reports.
Then you send it 0x2ff command for say 1A charging and measure by DC clamp meter.
ID 02FF data 01 E8 03 A0 0F 0A 00

[Zapatero]

Thanks, but i guess no one can verify which setting is the correct one to use it in a Volvo?

[arber333]

Thanks, but i guess no one can verify which setting is the correct one to use it in a Volvo?

That is easy.
My first test showed 800ms report interval from ID 0x305 0x306 and command 0x2FF which is sent from the car VCU to the charger at 800ms interval.
ELTEK protocol is the same as VOLVO. Difference is only in transmitt times which can be reprogrammed.

BTW I found ID unlock procedure here: https://www.diyelectriccar.com/threads/ ... st-1028449

[urgiv]

Volvo = 500kbps 1000ms CAN ID 00002FF

[urgiv]

if anyone need help with OBC test - repair - program Iam here for you

[Scrappyjoe]

Hi there, I have two questions in relation to my Eltek chargers.

1. Am I correct in presuming they cannot be controlled by a Zombieverter, and that I'll need some other controller (Due etc) to control them? If so, are there any drop and go implementations I can make use of?

2. Do I need to place my Eltek charger on the inverter side of the precharge circuit or the battery side? On the one hand, I see precharge circuits as close to the battery as possible in the diagrams floating on the web, on the other I see a case for keeping the charger and battery on the same side of the contactors so that nothing else is 'live' while charging.

[Scrappyjoe]

Ok, to try answer (2) above, from this forum post by arber333 viewtopic.php?p=70959#p70959 :

1. Arber is connecting the Eltek directly to the battery, before the contactors.
2. Reason given is that Eltek runs a resonance circuit (no idea what that is) which can be detrimental is there is no load on the output side.
3. The charger has a built-in 16A fuse
4. He uses the same cooling circuit as the rest of his setup

Still taking answers on (1).

[tom91]

1. Am I correct in presuming they cannot be controlled by a Zombieverter, and that I'll need some other controller (Due etc) to control them? If so, are there any drop and go implementations I can make use of?

Can be looked at being added, all depends on what is managing you EVSE signals?
Also what BMS are you using and how will it be capable of stopping charge?

[Scrappyjoe]

Hi tom91. Well, you have very quickly exposed my knowledge gaps. I presumed that one would simply tell the charger what voltage to pump out (which would be equivalent to 100% SOC) and then leave it be, since the actual amps coming out are quite small relative to the C rate of the battery.

Because of this assumption, I have deferred the BMS decision until I have decided what my battery will be later on in my build. For now it's all going to run on the bench with a little, unprotected 1kwh / 250v / 3C pack I built.

It sounds like that is a bad thing to do, and that I should be integrating the Eltek charger with a BMS and/or something to manage the state signals.

I actually just created a classifieds listing requesting some guidance on this subject. If you are happy to give me a bit more of an in depth perspective on this, I'd happily pay for your time.

It feels like there is a bit of a gap in Noob info on this part of EV conversions, so I'd be happy to write something up as I learn more as well.