Insys provides custom controls for e-mobility
Insys Microelectronics
Control computers
Insys Microelectronics has joined forces with RWE for its e-mobility project.
In the course of the project, RWE will install electric-vehicle charging stations in various German cities.
Insys has equipped the charging stations with control computers and industrial programmable controller modems, providing an uncomplicated charging process and simple invoicing.
These custom-built Insys devices handle the communication between car, charging station and the clearing centre in charge of the billing.
RWE intends to enable regular recharging of electric cars by installing a close-meshed network of charging stations, with the e-mobility project as a starting point.
Apart from high availability, a simple charging process and easy billing are important factors for the system's everyday suitability.
Furthermore, users should be free to choose their preferred energy provider.
All data communication is handled by the Insys-developed RWE e-mobility LSG control computer and the RWE e-mobility PLC power line modem.
Data communication between the charging station and car runs via the power-line modem.
The data connection between the charging station and the energy provider's clearing centre is established by the RWE e-mobility LSG unit via the mobile radio-based data-transmission service GPRS.
Battery recharging proceeds as follows: the user parks the car next to the charging station and connects it to the charging cable.
The car sends its identification data to the charging station via the cable.
The station then gathers tariff information from the clearing house and displays it to the user.
Meanwhile, the integrated charge controller monitors the energy flow.
Just like in conventional petrol pumps, a counter in the charging station measures the released amount of energy.
After the charging process is finished, the control computer sends a data packet containing measured values to the clearing house for further processing.
The clearing house then forwards the billing data to the operator of the charging station, who invoices the user.
A standardised protocol co-developed by Insys, which handles the complete communication between vehicle and charging station, ensures a comprehensive and operator-independent clearing.
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