Plug next to battery terminals - function?

"What component/function is this connector next to the battery terminal for?"
For me, it's a Skoda Yeti from 2017, while for my acquaintance, it's a Seat Leon from 2016.
I suspect that even more models from the Volkswagen Group have this part installed.

Evening.
I would argue that this is related to battery management.

If the component is connected to the pulse pole (or is part of the terminal), it is definitely the battery sensor.

Coldrule wrote:

If the component is connected to the pulse pole (or is part of the terminal), it is definitely the battery sensor.

Wrong! The battery sensor is located in the main power cable.

brezelmann01 wrote:

...Wrong! The battery sensor is located in the chassis ground wire.

Sure?
We have tested both the Hella parts (12V and 24V versions) and the old ISA ASIC.
As far as I recall, they were all connected to the positive and negative terminals (for voltage measurement), and the small connector was used for that purpose.

I stumbled upon an article about the battery connector. Apparently, disconnecting the connector disables the start-stop system. This results in error messages in the instrument cluster, but so far I haven't experienced any problems. Best regards, Wolfgang.

klahaui wrote:

Evening, I would argue that this

also falls under battery management.

That's correct!

Greetings from WOB.

I'm just chiming in here because this seems like the most appropriate place.

I'm having some problems with my Skoda Kodiaq, especially during the winter months.
The charging capacity may not always be sufficient when using the auxiliary heater.
As a result, it may happen that the vehicle will not start in the morning.

Thanks to the battery management system, vehicle batteries are now only charged to approximately 70%.
"There's no room for improvement because it likely needs to be 'space for recuperative charging'."
This is also relevant for exhaust emissions, especially during inspections and vehicle technical inspections (MOT).

Speak:
I don't just want to pull the plug.

Question:
Is it possible to increase the value, for example, to 90%, and thus activate the LIMA earlier?

Generally speaking, it's not advisable to stick to an old topic, because you won't be perceived as interesting or innovative.

When it comes to vehicles with auxiliary heating systems, it's important to remember the golden rule: the driving time should be at least equal to the operating time of the auxiliary heater when the engine is off. Whenever possible, it's advisable to recharge more frequently during the winter months.

I am not aware of any legal ways to increase the charging capacity.

Auxiliary heaters should ideally be operated using a secondary battery, if that is possible in that type of vehicle.

Otherwise, the rule regarding the runtime of the auxiliary heater in relation to driving time always applies, as mentioned before.

Rüdi wrote:

Auxiliary heaters should be operated using a secondary battery if it is possible in that type of vehicle....

It likely won't work on most vehicles, and in my opinion, it's not necessary if you use the standing wave frequency (StHz) appropriately.

Rüdi wrote:

Auxiliary heaters should ideally be operated using a secondary battery, if that is at all possible in such vehicles...

It always depends on the intended use of the vehicle. Our operational vehicles still have the secondary battery for the auxiliary heater, office equipment, and communication and operational equipment (digital radio, emergency lights, etc.). If you regularly use your vehicle for sleeping, whether as a camper or an angler, you should take similar precautions.

Does a classic battery disconnect relay still suffice today, or is an additional control unit now also required?

Hello,

Quote:

Does a classic battery disconnect relay still suffice today, or does it now also require an additional "brain"?

Good question, I can't find a built-in battery charger in my T6.

Best regards, Rainer.

vag-driver wrote:

It won't work on most vehicles, and in my opinion, it's not necessary if you handle the idle speed properly.

The concept of "meaningful" is relative; the auxiliary heater isn't just intended for pre-heating in the morning, but is often needed for other reasons during longer waiting periods.

It always depends! There are heaters that heat the water circulation system, which also warms the engine. And there are also air-only heaters.

A friend of mine, who's also an angler, has a built-in air heater in his T5.2, located near the rear right wheel arch, and it already came with a secondary battery installed.

Hello!

My company car is a VW-T6 work vehicle.
It only has one battery.

The auxiliary heater uses the coolant, and I use it every day in the winter. Sometimes even multiple times a day. I haven't had any problems with it, or with the battery, even though the car is now 5.5 years old. I usually drive between 50 and 200 kilometers per day.

The car also has a start-stop system.
I find them annoying, and even dangerous, because it has happened to me several times that I've ended up partially inside a roundabout when entering it. In that phase where you're just rolling, almost coming to a complete stop. Not entirely harmless.
Quite a few people have whistled at me and flipped me off.

I can turn off the start-stop function, but I have to do it again every time I start the engine. But I sometimes forget that.
If I could disable it with that,
That wouldn't be bad.