New battery 🔋 Add initial support for Microvast battery

[dalathegreat]

What

This PR implements initial support for Microvast batteries

Why

Requested in #2182

How

New option added to enable support for Microvast

Tip

You can help test this PR with this guide

[jasonday171973-eng]

I'm getting an error during the compile
I'm compiling for a lillygo t2can

[dalathegreat]

Hi @jasonday171973-eng , you should not compile, you should just download the precompiled file and update to it.

Direct link: https://github.com/dalathegreat/Battery-Emulator/actions/runs/23797237727/artifacts/6199172042
Instructions: https://github.com/dalathegreat/Battery-Emulator/blob/main/CONTRIBUTING.md#downloading-a-pull-request-build-to-test-locally-

[jasonday171973-eng]

I would say I'm an idiot. but I'm also sleep deprived.

I've now applied the bin file and here is a log.

Thanks for your speedy response

canlog_05-22-43.txt

[dalathegreat]

Looks like the battery is in some sleep mode, or we are not sending the correct info towards it. It is only repeating one message over and over again (1AAAF303). The message it sends is NOT in the DBC file.

CAN logs from a fully functional vehicle using this battery may be required, or lots of tinkering with the VCU messages to get it to wake up. I estimate a 5-10hours is required to fully exhaust the DBC possibilities, and there is no guarantee that it will work. So CAN logs from a vehicle with same battery would be next step.

[jasonday171973-eng]

I've been provided with a couple more bdu files that are related to this battery. single string would be most applicable

MV_Multi string CAN_Protocol V1.5_20221027.dbc.txt
MV_SingleString_CAN_V1.5_3(V1.7)+20230213.dbc.txt

[jasonday171973-eng]

I have 2 other batteries.
1 reads
1AAAF302
the other
1AAAF301

So I'm guessing the battery is announcing it's uniq ID/serial number.
These are deisgned to be used in parallel with other batteries and then connect to an external contactor.
I'm also guessing it's expecting a response before it sends more data.

As there is no contactor, the battery is live and can feed power and be charged.
I've emailed Microvast for more information.