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Home >> BMW >> 2013 >> Z4 28i, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1445 (Functional Description - F10 - Engine Performance) >> Engine Performance - Functional Description >> Drive ActiveHybrid >> Electrical driving

Electrical driving

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The electrical machine is a synchronous motor integrated in the housing of the 8-speed automatic gearbox. The connection between the electric drive and gearbox is by means of a separating clutch. The operating temperature is regulated via the cooling system of the combustion engine. The electrical machine with its 40 kW power output provides a torque of 210 Newton meters even from a standstill. The electrical machine is supplied by a lithium-ion battery specially developed for the vehicle. The high-voltage battery unit is surrounded by a high-strength housing. It is fitted in the luggage compartment between the wheelhouses. The high-voltage battery unit consists of 96 storage cells. The high-voltage battery unit has an independent cooling system and provides usable energy of 675 Watt hours.