Charging station for the batteries installed in mobile vehicles

Abstract

Charging station for the batteries installed in mobile vehicles, consisting of a controller (1) and several charging points (3) connected thereto, characterized in that the controller (1) has a radio receiver and the charging points (3) each have a radio device (8), wherein a measuring device is arranged in each charging point (3) which measures the voltage losses between the controller (1) and the charging point (3), and the radio device is configured to transmit the measured voltage losses to the radio receiver of the controller so that these can be taken into account when calculating the energy costs.

Description

State of the art

[0001] The present invention relates to a charging station for battery-powered electric vehicles, comprising a plurality of charging points for charging the electric vehicles with electrical energy and a common control system for controlling the charging process and billing the electricity customer. Electric vehicles also include ships and aircraft powered by rechargeable batteries.

[0002] A generic charging station is known from DE 10 2017 128 375 A1. In this station, eight charging points are controlled by a central controller. The energy consumption is calculated within the controller using an energy meter designated K3. The specific calculation method is not described. Technically, this meter measures the current flowing through the controller and the voltage present within it. The product of these measurements represents the power, and together with the charging time, this yields the amount of energy consumed during a charging process, which is then billed.

[0003] With such a charging station, it must be ensured that the billing of the energy consumed by each electricity customer is as accurate as possible. In charging stations of this type, the voltage distribution to the individual charging points is handled within the control unit and transmitted to the individual charging points via power cables. The distance between these cables, and therefore the cable length, varies considerably, as the charging points can be located in different places, for example, within a parking garage or underground parking facility. Cable length, cable cross-section, ambient temperature, and contact resistance are just some of the parameters that influence the resistance within these power cables. This results in a different and potentially fluctuating voltage drop between the control unit and the charging point. If the voltage value present in the control unit is then used to calculate energy costs, this means that the electricity customer will be overpaying.

[0004] The invention is based on the objective of providing a charging station that performs the charging process in such a way that a fairer billing of electricity costs can be achieved by only billing for the amount of electricity actually consumed. The invention and its advantages

[0005] This is achieved by recording the voltage drop and not including it in the electricity bill calculation for the customer. One initial solution involves measuring the voltage directly at the charging point, transmitting it to the control system, and using it to calculate the current. This involves directly determining the voltage value at the charging point using a dedicated measuring device and transmitting it wirelessly. This has the added advantage of avoiding voltage drops in the communication line, even if they are very small. However, this solution is still more expensive. In the future, it is conceivable to transmit the data via the planned 5G network, which allows for high data rates.

[0006] The charging station for the first solution is designed to measure the voltage directly at the charging point. Furthermore, the charging point incorporates a radio device for transmitting the voltage measured by a measuring device at each charging point to a radio receiver in the control system.

[0007] The invention is described in more detail with reference to the schematic drawings. These show Fig. 1. A representation of the charging station and Fig. 2 An enlarged view of the power connection of a charging point. Description of the exemplary implementations

[0008] The charging station consists of a control cabinet 1, which manages all charging stations. It has at least one power supply 4 and one communication line 5. At the end of a charging process, the communication line 5 transmits the electricity consumption data and / or the invoice for billing via the electricity customer's bank. Further data is exchanged via this line, such as an electricity customer's authorization to draw electricity.

[0009] Several charging points 3 are connected to the control cabinet 1. This is done via power cables 2, through which the charging current flows. These are designed for direct current, alternating current, or three-phase current; therefore, two or three live conductors are provided, as shown. A measuring device 7 is located in the control cabinet 1, which can measure the current I flowing in the power cables 2. Furthermore, it can detect the voltage U1 between the individual power cables 2 in the control unit 1.

[0010] According to one solution, a measuring device (not shown) for the voltage U2 is installed directly in each of the charging points 3, which reports the voltage U2 to the control unit 1 via a radio module 8, which has a radio receiver (not shown) for this purpose. Reference number list 1 Control 2 power cables 3 charging points 4 Power supply 5 Communication line 6 Communication line 7 Measuring device 8 radio module 9 storage QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2017 128 375 A1

[0002]

Claims

[1] Charging station for the batteries installed in mobile vehicles, consisting of a control unit (1) and several charging points (3) connected to it, characterized by that the controller (1) has a radio receiver and the charging points (3) each have a radio device (8), wherein a measuring device is arranged in each charging point (3) which measures the voltage losses between the controller (1) and the charging point (3), and the radio device is designed to transmit the measured voltage losses to the radio receiver of the controller so that these can be taken into account when calculating the energy costs. [2] Charging station according to claim 1, characterized by that the radio receiver and radio equipment are 5G capable.

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