Tesvolt aims to accelerate inductive charging for electric vehicles

Energy storage system manufacturer now shareholder in think tank for high-performance charging

Wittenberg, Munich/Germany, 7 July 2021 – Tesvolt is now a shareholder in Stercom Power Solutions, a first mover in the field of inductive charging. The two companies want to join forces to expedite wireless charging of electric cars, buses and lorries to make driving electric even more convenient, efficient and economical. The expert in commercial energy storage systems, already the recipient of several awards for innovation, and the think tank for high-performance charging have found answers to as yet unresolved questions – like delivering sufficient charging power and finding the right parking position over the magnetic coil.

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Supercharging delivers unlimited range

Stercom is a complete technology specialist and one of the first to develop really good products in the field of inductive charging,” explains Simon Schandert, founder and Chief Technical Officer at Tesvolt. “Our aim is to work together to bring highly efficient charging systems to the market and even in the medium term to enable inductive supercharging with up to 200 kilowatt charging power. This would also make it more efficient to charge while driving in the future.

Wireless charging involves transferring electrical energy in an inductive, in other words contactless, process from a magnetic coil in or on the floor to a receiver coil in the electric vehicle. This allows for many short but high-speed charging processes – for example on shopping centre forecourts, in multi-storey car parks as well as at home. Car makers like Audi and BMW are already installing charging coils in new vehicle models.

Inductive 44 kW charging station

So far the only wireless charging suitable for mass-production has just 3.2 kW. We want to introduce an inductive charging station to the market with a charging power of 44 kW, which means charging 14 times faster,” explains Daniel Hannemann, founder and Commercial Director at Tesvolt. “The marketable silicon carbide technology from Stercom works at 95 percent efficiency to permit a highly streamlined energy transfer – and a distance of up to 20 centimetre between the sender and receiver coils, something no other provider on the market has been able to do.” The charging stations will also contain intelligent software which shows the driver the right parking position for the vehicle over the magnetic coil.

Smaller batteries mean cheaper electric cars

Short and frequent charging dispenses with the need for large car batteries, given that the batteries only need to be around half the size. This significantly lowers the price of electric vehicles while making them lighter and therefore more efficient,” says Robert Sterff, founder and CEO at Stercom. Short and powerful charges do however place high demands on car batteries. “In Germany there is lot of research being done into solid-state batteries, which are particularly well suited for this.

First vehicles charge wirelessly

There are still some other challenges when it comes to inductive charging. The issue of how to pay for wireless charging, for example, has not been resolved. And the applicable DIN standard 61980-1 “Electric vehicle wireless power transfer systems” is still in the development stage. “We have already delivered inductive technology for international car manufacturers, and vehicles are in the test-run phase around the world,” reports Sterff. Wireless charging is, he continues, the future. Test routes with magnetic coils under the asphalt are already in place in countries like Italy, France and Sweden. And BMW has predicted blanket coverage of inductive charging by 2030 already.


About Tesvolt

Tesvolt specialises in battery storage systems for commerce and industry. The innovative company produces intelligent lithium storage systems with prismatic battery cells from Samsung SDI based on nickel manganese cobalt oxide. Tesvolt manufactures its commercial storage system solutions in series production at Europe’s first gigafactory for commercial battery storage systems at their Wittenberg site and delivers them worldwide. Tesvolt has already implemented more than 2,200 storage system projects and employs almost 100 people in its team. The young company has received several awards, including the German Entrepreneur Award in the “Rising Stars” category, the “TOP 100” award for innovation and the international award for rural electrification (ARE).


About Stercom

Stercom Power Solutions is a market-leading innovator in the field of inductive and tethered charging and power electronics. The company was established in 2014 in the south of Munich and its young team brings together outstanding expertise on all aspects covering the efficiency and safety of systems with high voltages and currents. Stercom is also a specialist in supercap storage systems that are used around the world for peak shaving in catapult launch roller coasters. The think tank developed one of the most powerful supercap storage systems in the world for the research project “Einstein Elevator” at the Leibniz University Hanover, which is used in the simulation of weightlessness.


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