Electric Drive Concept With 800V Technology for the Neue Klasse

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 BMW Group  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.

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.

Highly intelligent central control unit: the BMW Energy Master

All of the elements that enable this technological leap forward come together in the BMW Energy Master. This central control unit is positioned on the high-voltage battery and provides the interface for high- and low-voltage power supply and for data from the high-voltage battery. It also controls the power supply for the electric motor and vehicle electrical system and ensures the safe and intelligent operation of the high-voltage battery. Both the hardware and software of the Energy Master were developed fully in-house at the BMW Group.

“Cell-to-pack” and “pack-to-open-body”

Production of the Gen6 high-voltage batteries follows the “cell-to-pack” and “pack-to-open-body” principles. “Cell-to-pack” involves positioning the cylindrical cells – manufactured by the suppliers according to BMW Group specifications – directly in the housing of the high-voltage battery, without the intermediate step of a module being produced. “Pack-to-open-body” refers to the high-voltage battery’s new role as a structural component in the vehicle architecture.

Know-how from Bavaria and Austria – in demand around the world

Before series production of the high-voltage batteries gets underway worldwide, the production processes will be developed and pre-series batteries subjected to thorough testing. This will happen at the BMW Group pilot plants for high-voltage batteries in Parsdorf, Hallbergmoos and Munich. The new series production plants around the world will then be ready. The product and process expertise is centred in Bavaria. Production of the Energy Master will take place at Plant Landshut, which will then supply all the high-voltage battery assembly plants around the world. There, the highly intelligent control unit will be installed on the high-voltage battery. The electric motor with sixth-generation BMW eDrive technology is produced at Plant Steyr in Austria, which is also home to a development centre for electric drive systems and thermal management.

Production of the Energy Master at BMW Group Plant Landshut  

A state-of-the-art production system for the BMW Energy Master is taking shape at Plant Landshut. The plant is currently producing the highly complex control unit in pre-series. Series production on the first production line will begin in August 2025, with a further expansion stage to follow in mid-2026. This is the first time the development and production of this central control unit has taken place in-house at the BMW Group.

Recycling processes within the value chain

As electric mobility ramps up, there is an increasing focus on recycling of high-voltage batteries at the end of their lifecycle. Under a long-term partnership with SK tes – a leading provider of innovative technology lifecycle solutions – cobalt, nickel and lithium from end-of-life batteries are recovered from the BMW Group and integrated into the supply chain for the manufacture of new batteries. This closed-loop approach increases the efficiency and resilience of the BMW Group as part of a circular economy.

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. 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.

NEUE KLASSE additionally incorporates ASM technology

The Gen6 powertrain employs a second, additional electric motor technology in the form of the asynchronous motor (ASM). Here, instead of being generated by permanent magnets (PSM) or electrical excitation (EESM), the rotor’s magnetic field is induced by the stator. On this type of motor, the rotor takes the form of a metal cage. The asynchronous motor offers the advantage of a more compact design and superior cost efficiency. The ASM motor variants will be fitted at the front axle of NEUE KLASSE cars with BMW xDrive.

Extensive improvements to EESM technology

Besides the addition of ASM technology, the EESM technology has also undergone a major upgrade for Gen6: rotor, stator and inverter have all been fully designed for the new 800V architecture of the Gen6 tech in order to maximise drive system performance and efficiency. This has been further helped by a complete redesign of the oil and water cooling systems.

Lower weight, costs and energy losses – greater efficiency in the vehicle

The results obtained from intelligently incorporating new technologies into the electric powertrain while consistently enhancing existing systems make impressive reading. When compared to a Gen5 xDrive model, a future NEUE KLASSE model complete with EESM and ASM technology boasts the following improvements: energy losses have been reduced by 40%, costs by 20% and weight by 10%. By combining different types of electric motor, the BMW Group’s technology-open approach is therefore clearly in evidence within the field of electric mobility.