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EnglishCharging the vehicle -> Service life of high-voltage battery for your BMW i4 2021-2025
Charging the vehicle
MOBILITY
Optimizing the high-voltage
Discharged high-voltage
battery and vehicle battery
battery's service life
Proper use can optimize the high-voltage bat-
tery's service life:
General information
In addition to the high-voltage battery, the ve-
hicle has a 12 volt vehicle battery, which is re-
quired for operation of the onboard electronics.
▷
Charge high-voltage batteries with a low
charging capacity at an AC charging station
or Wallbox.
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For daily use, operate the vehicle with a
charge level between 10% and 80%. A
charging target of 80% can be set for this.
With a discharged vehicle battery, no operation
of the vehicle is possible.
Charge target, refer to page 295.
▷
Recharge the high-voltage battery as close
to a planned departure as possible. A time
frame can be set for charging.
Service life of high-voltage
battery
Charging in the time frame, refer to
page 295.
General information
The performance of the high-voltage battery,
and thus the vehicle's range, decreases over
its service life. The service life of the high-volt-
age battery can be optimized by how it is used.
▷
▷
Reduce the load on the high-voltage bat-
tery by using an efficient, anticipatory driv-
ing style.
Increasing the range, refer to page 281.
Avoid direct sunlight at high outside tem-
peratures.
Charging instructions
Charging habits have a significant effect on the
high-voltage battery's service life:
Long stationary periods, vehicle
shutdown
If planning to leave the vehicle stationary for
long periods of time, note the following:
▷
▷
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If the vehicle is stationary for long periods
of time with a battery charge of over 80 %,
this may negatively affect the battery's usa-
ble energy, charging time, and charging
power during DC charging.
▷
If the vehicle is to be stationary for more
than 6 months, park the vehicle with a
battery charge between 50 % and 80 %.
Check the battery charge every 6 months.
Frequent DC charging with a charging
power greater than 100 kW may negatively
affect the battery's usable energy, charging
time, and charging power during DC charg-
ing.
▷
If the vehicle is stationary for less than 6
months, park the vehicle with a charge level
between 30 % and 50 %.
If the vehicle has been charged several
times in a row with DC, this system may
temporarily reduce the charging power to
protect the high-voltage battery. If reduced,
the charging power is reset after a few
hours. DC charging again can extend this
time.
▷
▷
Do not park the vehicle for longer than
14 days if the electric range is depleted.
Do not leave the charging cable connected.
Maintenance
The high-voltage battery is maintenance-free.
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Online Edition for Part no. 01405B45E30 - VI/24
Charging the vehicle
MOBILITY
End of high-voltage battery service
life
If unrestricted driving can no longer be ensured
because the high-voltage battery is exhibiting
very advanced aging, Check Control messages
appear to indicate power and range restric-
tions.
The vehicle must be inspected by an author-
ized service center or another qualified service
center or repair shop. If, in this case, no inspec-
tion is performed, it may no longer be possible
to put the vehicle into operation.
A system error appears before it be-
comes impossible to put the vehicle
into operation.
It is not necessary to interrupt the current trip,
which can be ended as planned.
However, it will no longer be possible to
continue driving the next time the vehicle is
started.
Additional information:
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Check Control, refer to page 139.
Indicator lights and warning lights, refer to
page 140.
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