Hybrid System - High-Voltage Battery Damage Prevention

SI B61 37 12
General Electrical Systems

December 2012
Technical Service

SUBJECT
Possible Damage to High-voltage Battery

MODEL
F02 (ActiveHybrid 7)
F30 (ActiveHybrid 3)
F10 (ActiveHybrid 5)

SITUATION
The high-voltage (HV) battery cells could be damaged if the vehicle is prevented from entering sleep mode for an extended period of time.

CAUSE
The vehicle is prevented from entering sleep mode when connected to an external 12V battery charger for an extended period of time, e.g., over the weekend. This will keep the high-voltage battery electronics fully active and could cause possible internal damage.

CORRECTION
If it is necessary to charge the vehicle for a prolonged period of time (e.g., in the dealership showroom), make sure that the 12V battery charger does not stay on continuously (e.g., it is turned off overnight).

If it is necessary to charge the vehicle for a prolonged period of time, ensure that the HV battery is regularly recharged by the combustion engine.

This situation is caused by the energy-saving modes software strategy and will be eliminated with ISTA/P 2.49.0.

WARRANTY INFORMATION
Not applicable.