What is the SOH of your ZE50 batteries?

Mine was showing up in Tronity as being 90% (my trial has ended so can't get in to check it now). Apparently this is true with a lot of ZE50s. Will be interesting to see if the BMS update cures it.

 

If you want I can send you my Tronity referral code link. You get some free trial weeks and I get some discount.

I find out Tronity is very useful. How about you?

 

10k miles on mine it's down to 89% definitely having an adverse affect on range.

 

SOH can be read with free CanZE app using cheap elm327 adapter, along many other parameters. Another set of sensors can be read with Car Scanner Elm Obd2 app (select Zoe Phase 2).

 

I have tried the elm app on IOS and without success, it says I need to add elm to my local network, I cannot find a way to do this!

 

Maybe this step-by-step instruction should help to setup Car Scanner:

Configuring Wi-Fi connection to ELM327 adapter – Car Scanner ELM OBD2

www.carscanner.info

 

Imagine if you had an app for your old ICE that told you how much horsepower you’d lost after driving 10,000 miles?

I wouldn’t hold too much value on the SOH reading, it’s just an estimate.

Just enjoy the car. If you don’t want it to wear out then don’t use it and sell it!

 

I wouldn’t hold too much value on the SOH reading, it’s just an estimate.

I would agree with this, but doesn't the car use this figure to manage charging and estimate range? So it could be causing reduced range if it is reporting wrong.

 

@cah197
Well, losing 10% of stored energy in 11 months and 5500 km (approximately 3400 miles) is a lot and it is about 25 km (15 miles) of range in winter conditions. So, SOH does matter especially if this is manufacturer's fault.
It's like ICE's 50 litres rezervoar shrink for 5 litres.

I would like BMS enables storing 50 kWh instead 45.

 

@cah197
Well, losing 10% of stored energy in 11 months and 5500 km (approximately 3400 miles) is a lot and it is about 25 km (15 miles) of range in winter conditions. So, SOH does matter especially if this is manufacturer's fault.
It's like ICE's 50 litres rezervoar shrink for 5 litres.

I would like BMS enables storing 50 kWh instead 45.

Have you actually tested the car to see if the true energy capacity has been reduced?

 

As I say, there’s one way to know for sure.

 

2090 miles - 10 months old. Finally got CanZE running - ish (why is the market flooded with crap OBDII dongles?). Reports SOH as 91.9%.

 

Reading the warranty if the soh reaches 80% within the first 3 years it’s covered, then 70% thereafter to the 8 year mark. I’m guessing they’re confident it’s not going to reach this. Could the cold weather play a part with low soh?

 

I just checked ZE50 (July 2020 and only done 2800 miles) and the SOH is reading 93%. Last week it was 94%. Amazing because it hasn't been used for anything other than local shopping due to lockdown. I have no faith in the SOH that it is showing, and much prefer to measure the available energy at 100% SOC. Currently granny charging it to 100% in 2C so will know soon enough. I expect the range will still show roughly 220 miles.

 

So, I think I may be able to beat this.. Our ZE50 was in the dealership today to have a repair done and I asked the Tech if he could do a battery health check as it has been showing really low range in the past few months. So, after 4,300 miles our battery SOH is 81%.. Now, I think this may be due to it not being fully charged when reporting the figure, nor being that warm, but it still explains why the range figure is low. This result is from Renault's CLIP and not a third party app.

At the moment, I think we will wait til the first service which is due late spring, if I can take it in with a full battery and get another check done. If its dropped further, I think we may need Renault to look further.

Anyone else got a result?

I can't keep an eye on it as the iOS version of CanZE doesn't work with the ZE50.

 

So, after 4,300 miles our battery SOH is 81%..

That seems very low for such a new battery, it does sound like SOC. What would the options be for Renault if SOH got to 80% or below because of warranty. Would they literally replace the battery?

 

The reported SOH is managed by the BMS, and should be independent of temperature. It will be unaffected by SOC, or I suppose you could again say it should be. Silly question, but they didn't report SOC instead of SOH, did they? I wouldn't put it past some technicians...

There is an iOS version of CanZE available for the ZE50. I'm not quite sure of the ins and outs, but I know that @yoh-there isn't involved in the version currently available

 

My SoH reading doesn't seem to be affected by SoC or temp. For consistency I only compare when I've charged from 20 odd % to 100 on a 22kW charger and the battery temp is more or less the same (22- 25 degrees) but even then the SoH reads the same at start and end of charge.

I agree with what the above poster said, this is likely a software fault in the BMS as per previous gen Zoe but it does have a real impact on the amount of kWh the BMS makes available. The Power control app reads this value from the BMS ( can't remember if CanZe does) works on iOs too but not free Power Cruise Control - Apps ecosystem for electric vehicles

 

My take on this issue is that the BMS has similar (probably worse) issue as seen in the 22kWh Zoe.

When I first read my SOH it was showing 94%, it then went in for the pre con fix and when returned was showing 100%, I asked the tech if he had updated anything but no.

After getting the pre con fixed nothing on my app was updating so I thought I'd try disconnecting the 12v as that was how many fixed the same issue on older Zoe's, after reconnecting the 12v the SOH has now dropped to 88%.

I will be returning to the dealer when things feel a bit safer to get the app issue fixed and will ask them to check and fix the SOH

 

In answer to the queries about it possibly being the SOC and not SOH, he gave me a print out of the relevant page from CLIP, it shows Traction Battery SOC & Traction Battery Condition. The latter is 81%..

I seem to recall that SOH should be checked when battery is fully charged. Can’t make 20% difference to it though.

 

Well, my granny charging top-up finished in the night. SOH still 93%, usable SOC 99.8%, available energy 46.3 kWh, battery temp 3c, outside temp 0c. Range is only 203 miles.

So that's down 4.9 kWh of available energy from my best available energy on Dec 12th of 51.2 kWh (SOH 98%, external temp 6c, charged on a 22 kWh post, battery temp 13c).

I really hope that this is just a battery temperature or BMS thing and not real degradation. I'm currently granny charging my 2017 Q90 with 27k miles and SOH of 94%. If, as I expect, the Q90's available energy is 36 kWh at 100% then I may actually change my view of this thread from one of curiosity to one of real concern.

 

Range is only 203 miles.

‘Only 203 miles’. That’s pretty good for this time of year.

I’m not getting too worked up by the soh % loss some are reporting, and it’s strange this is happening during the colder months too. Let’s see what it’s like during the summer.

 

So, the tech reset the counters on the car yesterday so it wouldn't take driving history into account when calculating the GOM reading. Fully charged last night and its now reporting 181 miles at 100%. As it happens, this is 81% of 223, which is around what we got last year when the car was new on a full charge with the trip counter reset.
I wonder if there is a software issue, like the 22kWh Zoe had, where the BMS mis-reported the available energy and for which there was a BMS update. Our 22kWh went from 85 to 101% SOH after that BMS update and stayed up there for the rest of the time we owned it.

 

I was expecting 220 miles on full charge. Got 203, while is roughly 93% of 220....and 93% is my SOH.... Which is similar to Spike's SOH/range correlation.

Having dropped 5%of SOH in just over a month I'll be keeping tabs on it over the next two months.

 

220 miles seems very high for this time of year, unless you’re living in warmer climes of course. I can’t fathom why you’re ‘expecting’ to get that many miles. I’m not expecting to hit even 190 miles at the moment if I’m lucky.

 

These are after resets - ie. this is the range the car expects to be able to do on a full battery, ignoring previous driving style. It should reset to the same value every time. The fact it is showing significantly lower means the SOH is affecting the (at least reported) capacity of the battery.

 

Ok, here is the follow up....SOH drops nearly 1% in a day!!!

January 21st...about to start granny charging

January 22nd after granny charge to 100%

January 22nd...this afternoon about to charge on a 22 KW post

January 22nd...off the 22kw post, drove home, stuck on granny charger to get as near 100% as I could

Ok, you can see that the battery temperature being warmer has allowed it to have another 2 kWh of available energy. However, the SOH is crashing

This has to be a BMS issue with the ZE50 as it makes no sense for the SOH to drop this much such little time. I'm due to get -3 to -4 in the next three nights so let's see if is the cold killing the SOH. I have absolute faith in CanZE so I don't believe it is the app telling me porkies.

Also, please don't go on about granny chargers killing batteries as it is complete poo. Especially, when typically I am only doing it for the last 3%. My 21017 Q90 has been rapid charge to hell, and then granny charged to 100%, from 80+% SOC, and still has 94% SOH.

 

Interesting stuff, thanks for posting 👍🏼

 

Your battery isn’t at 100% charge, so SOH is meaningless

With the Zoe when the battery is cold the SOH is reported as quite low if same as old model

canZE is also in alpha for ZE50 so isn’t reliable, just drive the car and forget about the battery, that Mantra has worked well for the5 EVs I’ve owned in passed 4 years

 

@MrMoonUK ach, away!. How is it, in your perspective, meaningless? I have rapid charged my Q90 after 100 mile drives, in all seasons, and have seen the effect cold and hot batteries have on available energy. They had no effect on SOH. As for the charging of the ZE50 today, the cars stops charging...it decides when 100% is done, not me. The last charge today said 100% usable charge. I cut it it short with about 0.1 kWh to go because I was freezing my butt off As I said at the start of my posts, I always go with available energy as a guide to how far I can go, not the SOH. The SOH in the ZE50 looks completely bonkers. There is no way that SOH can drop that fast in less than 36 hours. @yoh-there can point to the validity of the ZE50 SOH reading. I simply cannot as I am simply a user of the app, but I fully appreciate the work done.

That said, I have completed my granny charging just finished in the 2017 ZE40 Q90...pics below. Remember, the car decides 100% is complete and stops, not me:

Q90 registered Sep 2017 ZE50 registered July 2020

I got the GT Line 135 CCS for one thing...long drives every fortnight for work and to see my teenage daughter...unfortunately, a certain virus has killed that off so far.

 

A sudden SOH reduction isn't really meaningless, it's a pain in backside for such a new battery. It definitely looks like a glitch with the BMS. But all said, even if the SOH was 100% I still wouldn't expect to get more then 190 miles out of the thing this time of year (3.6miles/kWh @ 50kWh usable).

In a situation like this I'd be tempted to just leave it and see what it's like in a month or so, if it reaches 80% then it would be a call to Renault due to it being a warranty case. I'll wait until the first service and see what it's like then once they have the readouts, you never know a BMS update might be released before then. 🤷‍♂️

 

@Dion Rust I think it is a BMS bug. I was watching just the other day that the MG ZS EV has a massive bug in their latest BMS update. Even a chap from Chorley MG dealership admitted to it. For ZE50 owners like myself I find it really strange that Renault may have screwed the pooch on the BMS. Yes, the 22 needed the BMS fix, but the ZE40 has been bang on. My Q90 Q-motor is **** poor at efficiency compared to the R-motor but at least it is consistently poor and never makes outrageous claims...not yet anyway.

That said, my ZE50 has allowed me to drive from Lancaster Park & Ride (yes, 99% charge) all 170 miles home to Barrhead. South of Glasgow is as hilly as Cumbria, and I still made it with 30+ miles to spare. If it turns out there is a massive BMS recall with it...I'll be neither annoyed or insulted. Better it gets fixed...if it needs it,