Victron damaged lithium battery

DIY
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1

Good morning,

The system is a full Victron 24V installation with:

2x 12V Lithium Smart Batteries (connected in series)
Smart BMS v2
Multiplus 24/3000/70
MPPT, Orion DC-DC, and other components, all managed by the BMS
One of the batteries is dead (below 1V) and does not appear in the app. The other one is fully charged. Both batteries are the same model, have the same age, and almost identical serial numbers. Before connecting them in series, they were fully charged and balanced. This was done more than 1.5 years ago. Since then, charging has been managed by two Orion units, a solar MPPT, and the Multiplus.

At some point, the whole system shut down. After investigating for over a week, I found that the green jumper on the BMS (which I was not using for a remote switch) was not properly tightened from the factory. This caused random system shutdowns. After fixing it, the system worked fine until today, when this battery failure occurred.

What could be the cause of this battery failure? I have been using the default Victron lithium profile for all components, and the setup was plug & play. The BMS manages all charge disconnections (MPPT, Orion, etc.), and there is also a Battery Protect in the system.

The Lithium Smart Batteries are supposed to have integrated cell balancing, and the BMS should have detected that one of the batteries was failing. Instead, it continued to allow charging.

I am aware of the microcontroller power-cycle procedure, but I no longer trust this battery, so I will send it back under warranty. Same for the BMS…

Also, I was unaware that a failing battery could make a strange noise—see video here: https://www.youtube.com/watch?v=nQ97iWI3WUM.

Thanks in advance for your help!

2

No battery balancer, no Smartshunt with midpoint monitoring ?

3

Are this Victron batteries? Otherwise: why do you blame Victron for an obvious error of the BMS?

4

Maybe because its a Victron BMS ?

5

Now wait a minute and think about why I first asked whether this was a Victron battery.

6

Looks and feels like Victron…

But a balancer is missing, whereas the BMS could do that too…

7

No battery balancer required if the battery gets fully charged regularly.
Assuming that there is no 12v load directly connecting to 1 battery.

1 Like
8

IF

9

For those who were wondering what the wheel of death that the OP has nailed to their wall.
It is a Texdev TEXU400 circular bus/fuse/isolator.

I scanned the QR code in the video. :wink:

1 Like
10

Haven’t you been warned about 1 word answers?

11

Yes, but one word says it all, should I write an essay ?

12

Perhaps you could reassure us that there were no loads directly connected to the battery .Especially no loads connected to a single 12v battery.

Also when was the last time the batteries were fully charged and Victron Connect reported the batteries as balanced.

13

Perhaps you could use a sentence to ask the OP?
That would be more helpful.

14

You wrote “if” the batteries are allways fully charged

I wrote IF, stating I would not rely on this condition, here you can find hundreds of people mistreating their batteries with wrong charger settings.

The post was only meant to inform YOU, but as an expert you probably realised this yourself

15

Given that I watched the video, I’m aware the OP has Victron SLB batteries and a VE Bus V2 BMS.

More help. Less snark pls.

16

sorry…wrong number

17

Isn’t my post completely self-explaining? Please tell me which part you don’t understand, and I will certainly help you.

18

No it isn’t, read opening post, from the 2. line

Victron System
Victron BMS
Victron Smart batteries

19

Yes LBS is related to victron batteries like the title of this thread

20

Five days ago, I received information that the other battery was fully charged and balanced. This one (which is dead) was supposed to have the same status.