The BMW Group is presenting its next leap forward in the field of electric drive technology – and in the process ushering in a new era of all-electric driving. At the Tech Days event in Landshut, the company has provided some initial insights into the development and production of high-voltage batteries and electric drive systems using the sixth generation of BMW eDrive technology. Every fully electric Neue Klasse vehicle will enjoy the benefits. The first Neue Klasse model will go into series production later this year at Plant Debrecen in Hungary. Below is an overview of the technology highlights:
- The Energy Master intelligent central control unit on the high-voltage battery – developed by the BMW Group and produced at Plant Landshut.
- A new high-voltage battery concept that, together with the BMW cylindrical cell, promises to bring about a technological quantum leap – including significant improvements in energy density, charging speed and range.
- The BMW Group also demonstrates its technology-openness with electric drive systems – through the use of different electric motor types: SSM and ASM.
- A modular approach to electric motor production gives the BMW Group an exceptional degree of flexibility.
- The BMW Group pools together expertise from the entire electric mobility value chain in Bavaria and Austria – from development, via purchasing and production, to recycling.
- The BMW Group demonstrates both technology-openness and full expertise across all areas of electric mobility.
Adopting a technology-open approach while setting the pace in electric mobility
“For the BMW Group, electric mobility is the future and a key area of growth. We are leading the way with this drivetrain technology. At the same time, we are deliberately taking a technology-open approach, recognizing that mobility needs vary between different regions of the world,” explains Dr Joachim Post, Member of the Board of Management of BMW AG, Purchasing and Supplier Network. “We want to offer our customers the best drive concept for every need. It is possible to do both: offer the best drive technology for every need and be at the forefront of electric mobility.”
Slimmer, faster, further: the high-voltage batteries for Gen6
With the new sixth-generation BMW eDrive technology (Gen6 for short), the BMW Group is making a technological quantum leap. Improvements on the product side include a 30% faster charging speed and 30% increase in range, with certain models achieving even higher figures. Added to which, the Gen6 high-voltage battery concept benefits from the new 800V technology. Gen6 will make its debut this year in the Neue Klasse and subsequently be used to drive models across the BMW Group’s fully electric product range. The concept for the Gen6 high-voltage batteries is fundamentally new and will find applications in all vehicle segments – right up to the high-performance models from BMW M GmbH. Its new, even slimmer design allows the high-voltage battery to be integrated into a spread of different models, regardless of vehicle height. The high-voltage battery takes on the role of a structural component in the bodies of the Neue Klasse models (“pack-to-open-body”), and the new cylindrical cells will be integrated directly into the high-voltage battery (“cell-to-pack”). The new BMW cylindrical cell has a 20% greater energy density than its predecessor, the Gen5 prismatic battery cell. And charging in both directions will be possible: the BMW Group has confirmed bidirectional charging as standard for Gen6.
Technology-open approach for electric mobility: the new e-drive system of Gen6
The BMW Group has retained the principle of an electrically excited synchronous motor (EESM) for its Gen6 power unit. On this type of synchronous motor, the magnetic field in the rotor is generated by windings fed with direct current rather than permanent magnets. In this way, the strength of the rotor’s magnetic field can be optimally adjusted to the prevailing load conditions. This results in both excellent levels of efficiency at customer-relevant operating points and constant power output at high rotational speeds. As with the Gen5 version, the synchronous motor will be positioned above the rear axle and feature a compact housing incorporating the electric drive unit, power electronics and transmission. Many of the motor’s technical details were created with the help of patented expertise, with the non-potted rotor alone accounting for more than ten patent applications.