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Swiss-manufactured battery to accelerate electric vehicles

16 November 2018

ecovolta developed a standardised Li-ion traction battery which cuts the time and expense needed to bring electric vehicles to the serial production stage.

This means that manufacturers can rapidly convert even smaller or pre-existing vehicle series to run on electricity, creating prototypes within just a few weeks. Previously, customised battery packs had to be developed for each individual vehicle model. The time taken up by this process created additional risks and meant that electric vehicle manufacture was only profitable with larger production runs. In contrast, ecovolta’s evoTractionBattery is already certified as a universal solution and can be quickly put to use.

“We estimate that vehicle manufacturers using a battery with an operating voltage of 48 volts and a capacity of 10 kilowatt hours (kWh), for example, will be able to save a total of 250,000 to 500,000 euros in development and certification costs,” says CTO Paul Hauser. 

“And things can move a lot faster, too. Our customers are generally looking at a development time of up to 2 years for a battery pack and the accompanying battery management system. The evoTractionBattery, on the other hand, can be configured within a few hours, whether it’s being used in a golf cart or a lorry,” adds Hauser.

Standardisation and certification smooth the path to e-mobility

This standardisation cuts the costs per kilowatt hour of electricity stored, lowering the barriers to entry for companies looking to move into e-mobility. It covers aspects of the dimensions, capacity levels and electronics. Users of the evoTractionBattery receive fully documented certification for all battery packs, including the crucial UN 38.3 certification for transport safety

The integrated battery management system enables master-slave operation as well as connection of the batteries to a CAN bus. This allows the batteries to exchange data with the higher-level control system, which is essential for safe and efficient vehicle operation. The safety technology, relay and precharging are also integrated.

The evoTractionBattery is available with a voltage of 24 volts, 48 volts and 400 volts as well as a capacity of 2.5 to 15kWh. Up to 16 batteries can be connected in series in any configuration, and up to 32 strings can be connected in parallel, allowing a battery voltage of between 24 and 829 volts and a total capacity of up to around 7,600kWh.

Every individual battery module has a fixed length of 520mm and a width of 218mm, while the height depends on the voltage and capacity. This creates clear parameters for the vehicle design. 


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