BMW 5 Series: Battery
AGM batteries are used for the voltage supply in the G30.
There may by 1, 2 or 3 batteries in the vehicle depending on the engine version and vehicle equipment.
- Starter battery in the luggage compartment with 90 Ah or 105 Ah.
- Auxiliary battery in the engine compartment with 50 Ah or 60 Ah.
- Auxiliary battery in the luggage compartment with 12 Ah for vehicles with 24 V steering.
An auxiliary battery in the engine compartment is used to provide assistance for the vehicle electrical system. On vehicles with electric active roll stabilization, the two anti-roll bar actuators are also supplied with power by this battery.
Intelligent battery sensor
The IBS records the following data of the 12 V battery:
- Voltage
- Current
- Temperature
The IBS performs the calculation and the evaluation of the information. The results are then forwarded to the DME and BDC via the local interconnect network bus.
Safety battery terminal
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Safety battery terminal
The safety battery terminal (SBK) is activated in the event of an accident of corresponding severity.
The voltage supply to the positive battery connection point in the engine compartment is interrupted and the consumers connected to this are de-energized. The safety battery terminal is installed in the power distribution box next to the battery.
Alternator
Alternators with increased efficiency are used in the G30. The increase in alternator efficiency is achieved by reducing the losses in the rectifier. The loss-causing diodes are replaced by actively activated MOSFET transistors. A reduction in fuel consumption is achieved by increasing the efficiency.
- Bosch with 180 A and 250 A, for 4 and 6-cylinder engines.
- Valeo with 252 A, for 8-cylinder engine.
Integrated supply module
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Integrated supply module
The engine control and its components are supplied with a 12 V voltage via the integrated supply module.
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Power distribution box, front right
Power distribution box, front right
A relay for terminal 30B is installed in the front right power distribution
box.
Consumers are supplied with terminal 30, terminal 30B and terminal 15N and
prov
24 V Electronic Power Steering
The greater weight of the engines in the G30 on vehicles with 8-cylinder
engines results in a higher
front axle load. This has the effect that the required power of the steering
assist increases. Du
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Alarm system
General information
When the vehicle is locked, the vehicle alarm
system reacts to the following changes:
Opening a door, the hood or the trunk lid.
Movements in the car's interior.
Changes in the vehicle tilt, for instance, during
attempts at stealing a wheel or when towing
the vehicle.
Disc
Operating temperature
The positions of the rotary valve at engine operating temperature are shown
by area C of the circuit
diagram.
Operating temperature, Bx8TU engine
The graphic shows control with the engine at operating temperature. The
position of the rotary valve
means that the cross-sections of the respective c
