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DE-102024210811-A1 - Control device for a charging system of an electric vehicle, charging device, charging station and method for controlling a charging process

DE102024210811A1DE 102024210811 A1DE102024210811 A1DE 102024210811A1DE-102024210811-A1

Abstract

The present invention relates to the signaling of information, in particular system states, between a charging station and an electric vehicle based on a voltage value. For this purpose, it is provided that the value ranges for the voltage values used to signal system states are dynamically adjusted. In particular, the value ranges can be adjusted based on the value of an electrical voltage during an initialization phase, for example, when connecting the charging station to the electric vehicle.

Inventors

  • Holger Denz
  • Johann Malsam

Assignees

  • Robert Bosch Gesellschaft mit beschränkter Haftung

Dates

Publication Date
20260513
Application Date
20241111

Claims (10)

  1. Control device for a charging system of an electric vehicle (20), comprising: a signal terminal (CTR) designed to be coupled to a connection point for signaling at a charging terminal (22) for the electric vehicle (20); and a control unit (11, 21) designed to detect a first value of an electrical voltage at the signal terminal (CTR) after the charging terminal (22) has been connected to a charging station (10), to determine at least one voltage range (B1, B2) for signaling a system state using the detected first value of the electrical voltage at the signal terminal (CTR), and to detect a signaling of a system state using the determined at least one voltage range (B1, B2).
  2. Control device according to Claim 1 , wherein the control device (11, 21) is designed to enable a charging process for the electric vehicle (20) if the value of the electrical voltage at the signal terminal (CTR) is within a voltage range (B1, B2) determined using the detected first value of the electrical voltage at the signal terminal (CTR).
  3. Control device according to Claim 1 or 2 , wherein the control device (11, 21) is designed to detect a fault condition if a value is detected at the signal terminal (CTR) which is outside the determined voltage ranges (B1, B2).
  4. Control device according to one of the Claims 1 until 3 , wherein the determined voltage ranges (B1, B2) comprise a first voltage range (B1) and a second voltage range (B2), and wherein the first voltage range (B1) comprises the first value of the determined voltage and the second voltage range (B2) does not overlap the first voltage range.
  5. Control device according to one of the Claims 1 until 4 , wherein the control device comprises a voltage source (U) which is electrically coupled to the signal terminal (CTR) and which is designed to provide an electrical voltage.
  6. Control device according to one of the Claims 1 until 4 , wherein the control device does not include an active voltage source.
  7. Charging device (20) for an electric vehicle, comprising: a charging port (22) designed to be electrically coupled to a charging station (11) for an electric vehicle (20), the charging port (22) comprising a connection point (CTR) for signaling, and a control device according to one of the Claims 1 until 6 .
  8. Charging station (10) for an electric vehicle, comprising: a power supply connection designed to be electrically coupled to the charging port (22) of an electric vehicle (20), the power supply connection comprising a connection point (CTR) for signaling, and a control device according to one of the Claims 1 until 6 .
  9. Method for controlling a charging process for an electric vehicle (20), comprising the steps of: Detecting (S1) a connection between a charging station (10) and a charging port (22) of an electric vehicle (20), wherein the charging port (22) includes a connection point (CTR) for signaling; Acquiring (S2) a first value of an electrical voltage at the connection point (CTR) for signaling; Determining (S3) at least one voltage range (B1, B2) for signaling a system state using the acquired first value of the electrical voltage; and Detecting (S4) a signal for a system state using the acquired at least one voltage range.
  10. Procedure according to Claim 9 , with a step to release a charging process if a predetermined signaling has been detected at the connection point (CTR) for signaling.

Description

Technical field The present invention relates to a control device for a charging system of an electric vehicle and to a method for controlling a charging process for an electric vehicle. The present invention further relates to a charging device and a charging station for an electric vehicle. background Vehicles that are fully or partially electrically powered have an electrical energy storage device, such as a traction battery. This energy storage device can be recharged from an external energy source when the vehicle is stationary. For this purpose, the electric vehicle can be connected to a charging station via a charging port. For example, a galvanic connection can be established between the charging port and the electrical energy source in the charging station to charge the energy storage device. Once this connection is established, the vehicle and/or the charging station can signal that it is ready to charge. If both the charging station and the electric vehicle are ready, the charging station can supply an electrical voltage at the charging port to recharge the energy storage device in the electric vehicle. The printed matter DE 10 2014 221 211 A1 For example, it describes a method for charging a traction battery in an electric vehicle, wherein communication first takes place between the charging device of the electric vehicle and the charging station during a communication phase, and then electrical energy is transferred during the charging phase. Disclosure of the invention The present invention provides a control device for a charging system of an electric vehicle, a charging device, a charging station, and a method for controlling a charging process, comprising the features of the independent claims. Further advantageous embodiments are the subject of the dependent claims. Accordingly, the following is planned: A control device for an electric vehicle charging system, comprising a signal connector and a control unit. The signal connector is designed to be coupled to a signaling connection point at the charging port of the electric vehicle. The control unit is designed to detect when the charging port is connected to a charging station. Furthermore, the control unit is designed to measure an initial voltage value at the signal connector after such detection. The control unit is also designed to… The control unit is designed to determine at least one voltage range for signaling a system state. In particular, this voltage range for signaling a system state can be determined using the first measured value of the electrical voltage at the signal terminal. Furthermore, the control unit is designed to detect a system state signal. The system state signal can be detected, in particular, using the determined voltage range. Furthermore, the following is planned: A charging device for an electric vehicle comprising a charging port and a control device according to the invention. The charging port is designed to to be electrically coupled with a charging station for an electric vehicle. In particular, the charging port includes a connection point for signaling. Furthermore, the following is planned: A charging station for an electric vehicle comprising a power supply connection and a control device according to the invention. The power supply connection is designed to be electrically coupled to the charging port of an electric vehicle. In particular, the power supply connection includes a connection point for signaling. Finally, the following is planned: A method for controlling a charging process for an electric vehicle. The method comprises a step for detecting a connection between a charging station and a charging port of an electric vehicle. The charging port includes, in particular, a connection point for signaling. Furthermore, the method comprises a step for acquiring an initial value of an electrical voltage at the connection point for signaling. Finally, the method comprises a step for determining at least one voltage range for signaling a system state. The voltage range can be determined, in particular, using the first recorded value of the electrical voltage can be determined. Finally, the procedure includes a step for detecting a signal indicating a system state. The system state can be detected, in particular, using the determined voltage range. Advantages of the invention The present invention is based on the finding that, in charging systems for the energy storage of an electric vehicle, a simple form of communication, for example for signaling charging readiness, can be achieved using a voltage signal with a variable voltage level. For example, a specific system state, such as charging readiness, can be signaled by providing an electrical voltage with a predetermined value or within a predetermined range. If such an electrical voltage within the predetermined range is detected by the receiving device, further actions can be initiated, such as starting the charging process. However, it is esse