[JGTW]

Hi there

First post (of many I presume) on your nice Forum.

Bought an MX30 two weeks ago. It was a demo-car of the local dealership with 12.000 km on the clock.

I configured the AC charging to stop at 90%. This morning i got in the car and it was like 99%

Is this to be expected when you keep the car plugged in all night? Do you guys top it up to maximum 80%, as suggested by Mazda?

 

[Thebriggie]

Isn't it strange that Mazda advertised maximum range and at the same time advise you to not charge regularly to 100%...anyway 90% as a regular setting is fine. If you need 100% range daily go for it...or Mazda change you advertised range in line with the recommendations...rant over but Mazda are just trying the assist with the longevity of the battery health.

As for charging above the set limits previous threads have pointed towards a charger fault not the car. The charging stops and then starts again. It would appear the car says stop, the charger stops and then the charger decides to start again. Can you check on the app, home page top right, 3 bars. Message centre and go across the top to vehicle status and check what the alerts say re charging starts and stops etc.

Alan

 

[JGTW]

Thanks for your reply.

App mentions only 2 updates:
17:05:08: start charging
21:19:54: battery is charged (normally that means the set level has been attained)

I do not have access to the charging station data yet. Maybe that clarifies anything.

 

[Thebriggie]

Or try another, possibly public charger, and check the result then 🤔

Alan

 

[seasidebaz]

Did Mazda ever recommend charge to 90%? I thought the website just says plug it in every night with no limit

 

[Thebriggie]

Baz, this is what I read from the handbook hence my little rant

Pointers for Maintaining Long Battery
Life
The high voltage battery life changes
depending on the vehicle conditions or
charging method.
For maintaining a long high voltage
battery life, be careful of the following:
Charging the high voltage battery
x Avoid unnecessary, frequent
charging.
x Charge the battery normally and
avoid quick charging as much as
possible.
x Only charge the battery with as much
power as needed, and do not always
fully charge the battery. The
maximum charge limit can be set.
Refer to Charging Settings on page
3-26.

Now given you can only set in 10% increments the next below 100 is 90%. So by stating do not always fully charge the battery it infers that 90% is the default upper setting to maintain battery life hence my rant at Mazda

Alan

 

[JGTW]

Did Mazda ever recommend charge to 90%? I thought the website just says plug it in every night with no limit

Yes, indeed - in a blog post by Mazda Belgium, it reads: "The chemical structure of a lithiumbattery stays intact longer if you charge the battery between
20% en 80% of it's capacity" Elektrische auto: Verleng de levensduur van uw batterij | Mazda Belux

 

[josje]

<< I configured the AC charging to stop at 90%. This morning i got in the car and it was like 99% >>
delayed charging (timer) maybe? each timer needs to be configured if you want a 'max' charge %
when ac charging is set to 80% and you use a 'new' timer (without configuring the timer to a certain %) it charges to 100%

 

[Thebriggie]

Josje, can you explain what you mean by timer. Car schedule, charger schedule? or something else?

You do within car schedule have the ability to set % within that schedule. So are you saying that that setting in schedule can possibly override the simple ac or dc % level....interesting

Alan

 

[josje]

car schedule and from my experience this overrides the ac% level

 

[Thebriggie]

Josje, yip you are correct. Section 3-26 onwards gives some interesting settings options. Schedule % overrides simple plug in setting. Also you can set the car to charge to an estimated range. JGTW worth checking the dealership did not set up any kind of schedules as well. See below

Setting example (if settings below are
made at 13 : 00 hours)
Function Available setting
changes
Start Time 12 : 00
End Time 18 : 00
Repeat Once
Charge Limit According to Esti-
mated Range
Estimated Range 50 km
In this case, when the charge
connector is connected, charging
starts immediately for charging to
18 : 00 hours on the same day.
However, if a charging amount
allowing a 50 km trip is reached, the
charging is stopped even if it is
before the end time.
Setting example (if settings below are
made at 13 : 00 hours)
Function Available setting
changes
Start Time 1 : 00
End Time 8 : 00
Repeat Once
Charge Limit According to Bat-
tery Charge Level
Battery Charge Level 100 %
In this case, charging is done from
the next day at 1 : 00 hours to 8 : 00
hours. However, if the Battery
Charge Level reaches 100% is
reached, the charging is stopped
even if it is before the End Time.
Charge Limit for AC Charging
Sets the charge limit when using an AC
charger.
Available setting changes
100% ʊ 10% (10 levels)
NOTE
For normal charge, set the maximum
charge limit of the high voltage battery.
Set the Battery Charge Level of the
charging timer for each charging timer
setting.
Charge Limit for DC Fast Charging
Sets the charge limit when using a DC
Fast charger.
Available setting changes
100% ʊ 10% (10 levels)

 

[Figgeman]

I have the same problem and I have discussed that in a different thread.
Last week - after eight months of issues - it was decided that my charging box will be replaced.

I agree with Alan; try a different charger. If that works, the car is probably not the problem.

 

[JGTW]

Weirdly the issue is now not present anymore...

 

[Figgeman]

I will get my charging box replaced next week. It has been clearly determined that the problem was not in the car. It works perfectly on all other charging boxes.