Eltek/Volvo charger [SOLVED]

[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.

[Scrappyjoe]

Starting a thread on Eltek charger control here

viewtopic.php?t=5194

[arber333]

Starting a thread on Eltek charger control here

viewtopic.php?t=5194

I updated wiki on Eltek interface for Arduino DUE
https://openinverter.org/wiki/Eltek_chargers

[jovani1989]

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

Hello urgiv, can you help me on how to bench test a Eltek charger on bench without battery? I'm triyng to fix one of these chargers PN: 31453939, but also i need to test it to see if i have output voltage.
I have two usb to can adapters:
https://www.aliexpress.com/item/1005006 ... pt=vnm2glo
And
https://www.aliexpress.com/item/1005006 ... Redirect=y

Do you think they will work to comunicate with the charger? Thanks.

[arber333]

Hello urgiv, can you help me on how to bench test a Eltek charger on bench without battery?
...
Do you think they will work to comunicate with the charger? Thanks.

To start Eltek and control it you only need one CAN telegram ID and you need to connect it to AC.

1. Connect charger DC output port to 2x light bulbs in series for protection
2. Connect charger to AC
3. Charger should be sending its status report when it is connected to AC, IDs are 305, 306, 307 and 308
4. send this CAN telegram to control charger ID 2FF MSG 01 E8 03 6E 0F 32 00

I have written here how command telegram works
https://leafdriveblog.wordpress.com/201 ... w-charger/
https://leafdriveblog.wordpress.com/202 ... 41121-030/