Battery percentage stuck/frozen (now resolved)

[dsimpkins]

Yesterday I needed to top up on a rapid charger to get home. I stopped at an Evyve charger, which is a brand I've not used before (mostly Instavolt or Osprey) Charging was fine, stuck about 30% charge in, and continued on my way. It used some of that charge getting home, and the displays updated as usual.

Wife used the car later on that evening, but only a very short journey. She said the car went up by 1% on that short journey and return. I said, probably the regen on a hill did that.

This morning going to work, the display on both the dash and infotainment showed no change to battery percentage. Odometer, and miles/kWh updated as usual. I got to work using ZERO battery according to the displays. This obviously wasn't correct as I know it uses 3 or 4% depending on traffic.

So, I charged it at work (I usually charge at work) Took battery all the way to 100% to ensure a balance charge took place, and on way home happy to report the battery percentage updated as it should ( I whooped out loud when it went from 100 to 99%)

Just wondering if anyone else encountered this problem? My theory is that the rapid charge meant the cells were out of balance, and the car's BMS couldn't report the battery percentage properly. A longer journey may have sorted it, but good to know a balance charge will fix it if it happens again.

 

[Rolfe]

How long had it been since you had previously carried out a balance charge?

 

[dsimpkins]

Last balance charge was within the last two weeks. So cells shouldn't be that far out of balance.
Are you trying to say my wife broke the car?

 

[Rolfe]

No, I just wondered. I can't see why it would be a balancing problem if you balanced that recently.

I have the SR, which is really keen on balancing frequently, but I've twice had it on long journeys involving three consecutive ultra-rapid chargers, and never any issue with the % charge reading or the GOM.

 

[dsimpkins]

It is very strange, I've had the car nearly six months, used by slow and rapid chargers, and used multiple rapid chargers in a row while on holiday, and not encountered this before. It could just be a "feature" (not a bug) of the software, or some sort of handshake/comms error with the Evyve charger (however, it was fine initially afterwards)

It's working normally at the moment, so I guess I will have to wait and see if it occurs again. It did appear to rectify itself almost immediately once connected to a slow charger at work and the initial handshake/comms with the car was completed. Saw the battery percentage on the display drop, and then start rising again once it had been charging for a few minutes.

 

[Rolfe]

Hopefully just a one-off that won't happen again.

 

[Ian Key]

Probably a bit of software didn't load properly.

 

[tsedge]

Could be software or could be balancing. MG's recommendation is to balance every week.

 

[Rolfe]

I thought they only recommended once a month for the Trophy and SE LR? (Once a week for the SE SR.) But in any case, not doing that religiously shouldn't give rise to overt errors like this.

 

[STJ73]

My mg app hasn't worked for the past 24hrs I've uninstalled it and re installed in but still no joy!

 

[Rolfe]

iPhone or Android? There are a couple of threads on this running at the moment.

 

[STJ73]

iPhone or Android? There are a couple of threads on this running at the moment.

Android running the new android version

 

[tsedge]

I thought they only recommended once a month for the Trophy and SE LR? (Once a week for the SE SR.) But in any case, not doing that religiously shouldn't give rise to overt errors like this.

Yes, sorry I misread the fact that they have a LR.

 

[Rolfe]

Android running the new android version

Try here.

Updated iSmart app - android only

Hi On FB they’re reporting a new android iSmart version with additional features. Credit to Daniel Brown. But no update to the iOS app. Let’s hope it’s not another software divergence as evident for the Trophy and SE car software packages.

www.mgevs.com

 

[dsimpkins]

Probably a bit of software didn't load properly.

Maybe, but the car had been switched off twice after the rapid charge, happened on second and third journey, so very strange.

 

[BG4]

Just reporting that this has happened to me today, battery stuck on %77 after quick charge (have driven 22km after charge) , was only battery balanced 2 days ago, will need to try slow charger now to see if can reset like you did