BMW 3: Technical data
The high-voltage battery unit of the G20 PHEV is manufactured by BMW itself in Dingolfing /Germany.
The cells of the high-voltage battery unit are supplied by the Korean company Samsung SDI. The high-voltage battery unit was also developed by BMW AG itself.
The battery cells used in the high-voltage battery unit of the G20 PHEV belong to the group of lithium- ion batteries with a cell voltage of 3.69 V.
The two high-voltage battery units of the G20 PHEV are compared with the predecessor model F30 PHEV in the following tables.
For more information on the high-voltage battery unit, refer to the product information "ST1927 SP41 High-voltage Battery".
Installation location
G20 PHEV, installation location of the high-voltage battery unit
The high-voltage battery unit is installed centrally in front of the rear axle. This has the advantage that the center of gravity in the G20 PHEV was lowered, which in turn results in improved driving characteristics. All connections are accessible from the vehicle underbody.
G20 PHEV, mounting of the high-voltage battery unit
- 2 mounting bolts and equipotential bonding screws
The high-voltage battery unit is screwed to the vehicle body by means of eight brackets and ten mounting bolts. This way the weight and the acceleration forces occurring during the journey are supported at the body. All mounting bolts are accessible from the vehicle underbody. However, to release the screws several trim panels, the torsion bars, the exhaust system, as well as the propeller shaft need to be disassembled first.
Washers are required for four mounting bolts. This is extremely important as otherwise the body may be deformed. It is imperative that the current repair instructions are observed.
For the removal of the high-voltage battery unit, firstly all preliminary work specified in the current repair instructions (diagnosis, drawing off refrigerant, voltage disconnection, disassembling the trim panels, etc.) has to be performed. Before releasing the mounting bolts, the mobile lifting table MHT 1200 with matching fixtures must be prepared and positioned under the high-voltage battery unit.
The low-resistance connection between the housing of the high-voltage battery unit and the body is established by means of two mounting bolts and equipotential bonding screws.
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Equipotential bonding
The low-resistance connection between the housing of the high-voltage battery
unit and ground is
a crucial prerequisite for the fault-free function of the integrated isolation
monitoring. This is wh
Monitoring functions
High-voltage interlock loop
The SME control unit evaluates the signal of the high-voltage interlock loop
and checks whether there
is an open circuit with this circuit. In the event of an open circuit
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Through-loading system
Concept
The cargo area can be enlarged by folding down
the rear seat backrest.
General information
The rear seat backrest is divided at a ratio of 40-20-40. The side rear seat backrests and the
center section can be folded down separately.
The rear seat backrests can be folded down from
the cargo a
Hydraulic braking
G20 PHEV, hydraulic braking
The brake booster is operated via the driver's foot operation, and the brake
actuation is determined by
means of the brake pedal angle sensor.
Depending on the brake pedal angle sensor signal, the valves in the Dynamic
Stability Control (DSC)
are switched so that
