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[flo_93]

Thanks for all the information!
The gnd from the regulator goes to the negative (116v) of the charger?

[DerKrawallkeks]

Yes. But where do you get your power from for the regulator?

[mryan]

12V auxiliary power line - so the OP needs to use the 12v auxiliary ground, not the charger DC ground

https://sc04.alicdn.com/kf/H00b6019a21224816b265fc2121e111b8t/234038344/H00b6019a21224816b265fc2121e111b8t.jpg

[Crissa]

Someone should put that photo on the unofficial manual.

Links can expire...

-Crissa

[DerKrawallkeks]

I'm not sure the Aux 12V exists on his charger, that's why I asked.
It must be referenced to the battery ground, since this is what the bike needs to understand the signal.

[flo_93]

Yes, it is the 12v auxilary output i want to use...
So 12v Gnd or 116v gnd?
Can there go anything wrong if i just try?

[DerKrawallkeks]

It must be battery ground, cause the bike uses this as the reference for the signal.

What you should do is check for continuity between the Aux GND and charge output GND on your charger. If they're the same it's ok, if not you'll have to connect them both.

Makes sense?

[flo_93]

I checked for continuity but it seems the 12v lines ground and the charger output are not connected...
Is it safe to connect both grounds or can the charger be damaged?

[DonTom]

I checked for continuity but it seems the 12v lines ground and the charger output are not connected...
Is it safe to connect both grounds or can the charger be damaged?

It should be fine.


The purpose of a ground is so a lot of wire can be saved with a common connect on every wire.  That saves a lot of wire and much work in the design.  Around 50% of it.   There has to be a completed circuit or else grounding things together cannot draw any current or do anything at all.


If running two grounds together causes a problem, then some info. is missing here.  By itself, it is not a problem.


-Don-  Reno, NV

[flo_93]

Thanks, i will try that then...

Annother question:
I already charged with the charger while keyed on. It charges fine.
Now i want to know if the chargers voltage is right...
Is the battery voltage in the app while charging also the voltage provided by the charger or can the charger voltage actually be higher?

[DerKrawallkeks]

the voltage is always the same, since the charger is directly connected to the battery with nothing in between, just the cable;)

[DonTom]

Thanks, i will try that then...

Annother question:
I already charged with the charger while keyed on. It charges fine.
Now i want to know if the chargers voltage is right...
Is the battery voltage in the app while charging also the voltage provided by the charger or can the charger voltage actually be higher?

I do not understand the question. Charging voltage must be higher than the battery voltage to charge at all. But too high will cause problems and make the battery overheat. But it can be tricky to go by voltage as, AFAIK, the chargers require to see voltage to put out voltage, so there is no simple way to measure it.  And to measure the high DC current can also be tricky.


I am not the correct person to ask when it comes to how the chargers should be programmed and such. But some others here probably can help with that.


-Don-  Cold Springs Valley, NV

[flo_93]

Of course charging voltage has to be higher than battery vpltage

What i meant was:
How can i check the input voltage of the charger while charging? I dont want the charger to put in for example 140v when the battery has only 103v

The app just shows me battery voltage not charger voltage

[mryan]

Of course charging voltage has to be higher than battery vpltage

What i meant was:
How can i check the input voltage of the charger while charging? I dont want the charger to put in for example 140v when the battery has only 103v

The app just shows me battery voltage not charger voltage

So the way it works is when the charger is connected, it can't actually put out 140v, if it did then it would apply like 1000 amps and definitely overheat the battery. The charger voltage is so close to the battery voltage it doesn't matter. What does matter is how high the charger will charge the battery to. You don't want to overcharge to a higher voltage than recommended (115v I think).

Hopefully that sort of explains it. The charger isn't capable of doing what you think it might do. The only thing you need to check is final pack voltage after charging.

[DonTom]

Of course charging voltage has to be higher than battery vpltage

What i meant was:
How can i check the input voltage of the charger while charging? I dont want the charger to put in for example 140v when the battery has only 103v

The app just shows me battery voltage not charger voltage

If the charger voltage is too high, the charging current will be too high.  There is no way you're going to get 140 VDC on the load of the 103V battery with  a 3.3 KW charger. The current draw will keep the charger voltage down if you only have 3.3 KW of charging.


What you can do, if you know the voltage at 100% SOC, make sure your charger voltage stays below a half volt or so above that battery voltage while charging. IOW, expect why charging to get to just above the battery voltage, but not much above and you should be okay.


At least that is what I would do. There are probably others here who can give you a more precise answer.


-Don-  Cold Springs Valley, NV