question

kirby avatar image
kirby asked

Why DVCC setting "Limit managed battery charge voltage" does not work?

Can someone tell me, why "limit charge voltage" doesn't work? But in the same time, current limit works well.
Cerbo GX is not connected to the battery.

image-2022-12-07-221542764.png


For "Limit managed battery charge voltage" I set max value: 56.6V
For "Limit managed battery charge current" I set max value: 35A

Are there some pitfalls?

I have the system:



cerbo gxmultiplus ve.bus
image-2022-12-07-221542764.png (10.7 KiB)
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

2 Answers
kevgermany avatar image
kevgermany answered ·

Is the temperature compensation off? It should be for lithium.

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Alexandra avatar image
Alexandra answered ·

@kirby

A couple of thoughts here.
A BMV is helful in non can interfaced batteries.

If what is pictured is the DC bus voltage widget then it is not a reflection of the battery voltage. Check you battery with a meter.

The balancing in the battery may also not be working fast enough, so charge at a lower amp rate. That can also cause overshoot.on battery voltage.

Battery bms switching off due to overcharge can cause that spike as well.

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Related Resources

Cerbo GX product page

GX family product range

Cerbo GX & GX Touch datasheet

Cerbo GX Manual

Venus root access document

Additional resources still need to be added for this topic