Charging device for bi-directional charging of an electrochemical energy store of an electrically powered vehicle, and method for operating said charging device

Abstract

A charging device for bi-directional charging of an electrochemical energy store of an electrically powered vehicle.

Description

[0001] Description

[0002] title

[0003] Charging device for bidirectional charging of an electrochemical energy storage device of an electrically driven vehicle and method for operating the same

[0004] The invention is based on a charging device for bidirectionally charging an electrochemical energy storage device of an electrically driven vehicle, a method for operating a charging device and a use of the charging device according to the preamble of the independent claims.

[0005] State of the art

[0006] Charging stations for battery-powered electric vehicles (BEVs), which are particularly used in private settings, such as 11 kW AC wallboxes, often do not require an access control system if they are located in a restricted-access area. For convenience, these stations are therefore often configured to allow any connected vehicle to charge.

[0007] However, not every battery-powered electric vehicle necessarily requires its own charging facility. Calculating the energy consumption, a battery-powered electric vehicle with a generous annual mileage of 20,000 km and 25 kWh / 100 km requires only 5,000 kWh per year, which, with a charging capacity of 11 kW, corresponds to an average charging time of approximately 1 hour and 15 minutes per day. It is therefore likely that future users, such as married couples, parents and children, or neighbors, will share charging facilities if a separate parking space with charging facility cannot be provided for each battery-powered electric vehicle.

[0008] However, if the users are not only people from one household, such as married couples, there is a desire to allocate the electricity consumption to the battery-powered electric vehicles in order to be able to distribute the costs fairly among the users.

[0009] To enable such billing, fast-charging charging stations use a technology called plug-and-charge, in which access authorization and billing are carried out without user action by the battery-powered electric vehicle via digital communication with the charging station.

[0010] However, this plug-and-charge technology requires complex technology in the charging station, including a connection to a service provider's backend system via the internet for both authorization and billing. This connection is not available in all installations, for example, due to dead spots. This requires a simple, locally operated billing system.

[0011] The document US 9 810 725 B2 discloses a method and apparatus for charging a battery.

[0012] Document US 2020 / 0101862 A1 discloses a charging management system comprising a battery, an on-board charger, and a power integrator. The object of the present invention is to further improve the prior art. This object is achieved by the features of the independent claims.

[0013] Disclosure of the invention

[0014] Advantages of the invention

[0015] The procedure according to the invention with the characterizing features of the independent claims has the advantage that the charging device for bidirectionally charging an electrochemical energy storage device of an electrically driven vehicle comprises a communication unit for detecting an identification variable of the electrically driven vehicle and / or the electrochemical energy storage device, wherein the identification variable represents a chassis number, a serial number of the electrochemical energy storage device and / or owner information of the electrically driven vehicle;and a control unit for controlling the bidirectional charging process, for logging an electricity quantity representing an amount of electricity supplied from the charging device to the vehicle and / or from the vehicle to the charging device depending on the identification value, for logging an electricity price value representing a fee for the electricity quantity at the respective time, and for determining a usage fee value representing a usage fee depending on the electricity quantity, the electricity price value, and the identification value; and an output unit for optically, acoustically, and / or haptically outputting and / or wirelessly transmitting the electricity quantity, the electricity price value, and / or the usage fee value depending on the identification value.

[0016] Further advantageous embodiments are the subject of the dependent claims. The communication unit, the control unit, and / or the output unit comprise a radio interface for wireless data transmission. Advantageously, this allows the electricity quantity, the electricity price, and / or the usage fee to be transmitted depending on the identification value, thereby enabling, in particular, billing between users of the charging device.

[0017] The electricity price is stored locally in the charging device's control unit. Advantageously, no internet connection is required for billing.

[0018] The electricity price value stored locally in the control unit can be updated via the radio interface and / or a frequency modulation method. This advantageously allows information regarding a contractual adjustment of the electricity price to be transmitted to the charging device, for example, via a smartphone.

[0019] The output unit includes a display, particularly a touch-sensitive display. This advantageously allows users of the charging device to access information about the charging process, power consumption, and costs directly on the charging device.

[0020] The method according to the invention for operating a charging device according to the invention comprises the following steps: a) detecting an identification variable by means of the communication unit of an electrically driven vehicle and / or an electrochemical energy storage device connected to the charging device in a wired and / or wireless manner, wherein the identification variable represents a chassis number, a serial number of the electrochemical energy storage device and / or owner information of the electrically driven vehicle; b) comparing the detected identification variable with stored identification variables; c) starting a bidirectional charging process depending on the comparison; d) logging a current quantity variable which represents a current quantity supplied to the vehicle and / or from the vehicle depending on the identification variable;e) Recording an electricity price value representing a fee for the electricity quantity at the respective time; f) Determining a usage fee value representing a usage fee depending on the electricity quantity, the electricity price value and the identification value; e) Outputting the electricity quantity, the electricity price value and / or the usage fee value depending on the identification value using an output unit;

[0021] According to an advantageous embodiment of the invention, a

[0022] A computer program is provided, comprising instructions which cause the device for operating an electrochemical energy storage device to carry out the method steps according to the invention.

[0023] Furthermore, a machine-readable storage medium is provided on which the computer program is stored.

[0024] A method according to the invention for limiting a

[0025] The intermediate circuit voltage of an electrically powered vehicle is advantageously used for electric vehicles, fuel cell vehicles, hybrid vehicles, plug-in hybrid vehicles, aircraft, pedelecs or e-bikes.

[0026] Brief description of the figures Embodiments of the invention are shown in the drawing and explained in more detail in the following description.

[0027] They show:

[0028] Figure 1 is a schematic representation of an embodiment of a charging device according to the invention; and

[0029] Figure 2 is a schematic representation of a flow chart of a method according to the invention for operating a charging device.

[0030] Detailed description of the implementation examples

[0031] The same reference numerals denote the same device components in all figures.

[0032] Figure 1 shows a schematic representation of an embodiment of a charging device 100 according to the invention. The charging device 100 comprises a communication unit 101, a control unit 102 and an output unit 103.

[0033] An electrically powered vehicle 104 comprises a communication unit 105 and at least one electrochemical energy storage device 106. The electrically powered vehicle 104 is electrically connectable to the charging device 100 via a wired connection 108. The communication unit 105 of the electrically powered vehicle 104 communicates with the communication unit 101 of the charging device 100 via a wireless and / or wired data connection 107. An electricity price representing an electricity price at the respective time is stored in the control unit 102. If the electrically powered vehicle 104 is locked, a chassis number, a serial number of the electrochemical energy storage device of the electrically powered vehicle 104, and / or owner information of the electrically powered vehicle 104 is first determined using the communication unit 101.

[0034] If this information has been successfully verified by the control unit 102, a bidirectional charging process is initiated, and the amount of electricity supplied from the charging device 100 to the vehicle 104 and / or from the vehicle 104 to the charging device 100 is logged. A fee for the bidirectional charging process can be determined based on the amount of electricity, the respective time, and the amount of electricity.

[0035] The amount of electricity and / or the fee can be output via the output unit 103, for example, a display. In a further embodiment, the amount of electricity and / or the fee can be transmitted wirelessly via a radio interface of the output unit 103, for example, to a smartphone.

[0036] Figure 2 shows a schematic representation of a flowchart 200 of a method according to the invention for operating a charging device 100.

[0037] In step 201, an identification variable is determined by means of the communication unit of an electrically driven vehicle and / or an electrochemical energy storage device 106 connected to the charging device 100 in a wired and / or wireless manner, wherein the identification variable represents a chassis number, a serial number of the electrochemical energy storage device, and / or owner information of the electrically driven vehicle 104. In step 202, the detected identification variable is compared with stored identification variables.

[0038] In step 203, a bidirectional loading process is started depending on the comparison, for example, if the determined identification variable matches at least one of the stored identification variables. Otherwise, the method is terminated in step 208.

[0039] In step 204, a current quantity representing a current quantity supplied to the electrically driven vehicle 104 and / or by the electrically driven vehicle 104 as a function of the identification quantity is logged.

[0040] In step 205, an electricity price value is recorded, which represents a fee for the amount of electricity at the respective time.

[0041] In step 206, the usage fee amount, which represents a usage fee depending on the electricity quantity amount, the electricity price amount and the identification amount, is determined.

[0042] In step 207, it is checked whether the charging process has been interrupted, for example if the electrochemical energy storage device 106 is fully charged or a charging cable 108 has been disconnected from the charging device 100.

[0043] In step 208, the electricity quantity, the electricity price, and / or the usage fee are output using an output unit depending on the identification value if the charging process has ended. Otherwise, the method continues in step 204. In an alternative embodiment, the electricity quantity, the electricity price, and / or the usage fee are continuously output using an output unit depending on the identification value during the charging process.

Claims

Claims 1. Charging device (100) for bidirectionally charging an electrochemical energy storage device (106) of an electrically driven vehicle (104), wherein the charging device (100) comprises a communication unit (101) for detecting an identification variable of the electrically driven vehicle (104) and / or the electrochemical energy storage device (106), wherein the identification variable represents a chassis number, a serial number of the electrochemical energy storage device (106) and / or owner information of the electrically driven vehicle (104);a control unit (102) for controlling the bidirectional charging process, for logging an electricity quantity representing an amount of electricity supplied from the charging device (100) to the vehicle (104) and / or from the vehicle (104) to the charging device (100) as a function of the identification value, for logging an electricity price value representing a fee for the electricity quantity at the respective time, and for determining a usage fee value representing a usage fee as a function of the electricity quantity, the electricity price value, and the identification value; an output unit (103) for optically, acoustically, and / or haptically outputting and / or wirelessly transmitting the electricity quantity, the electricity price value, and / or the usage fee value as a function of the identification value; 2. Charging device (100) for bidirectionally charging an electrochemical energy storage device (106) of an electrically driven vehicle (104) according to a of the preceding claims, wherein the communication unit (101), the control unit (102) and / or the output unit (103) comprise a radio interface for wireless transmission of data.

3. Charging device (100) for bidirectional charging of an electrochemical energy storage device (106) of an electrically driven vehicle (104) according to one of the preceding claims, wherein the electricity price variable is stored locally in the control unit (102) of the charging device (100) 4. Charging device (100) for bidirectionally charging an electrochemical energy storage device (106) of an electrically driven vehicle (104) according to one of the preceding claims, wherein the electricity price variable stored locally in the control unit (102) can be updated by means of the radio interface and / or by means of a frequency modulation method.

5. Charging device (100) for bidirectionally charging an electrochemical energy storage device (106) of an electrically driven vehicle (104) according to one of the preceding claims, wherein the output unit (103) comprises a display, in particular a touch-sensitive display.

6. Method for operating a charging device (100) according to one of the claims 1 to 5, comprising the following steps: a) detecting an identification variable by means of the communication unit (101) of an electrically driven vehicle (104) and / or an electrochemical energy storage device (106) connected to the charging device (100) in a wired and / or wireless manner, wherein the identification variable represents a chassis number, a serial number of the electrochemical energy storage device (106) and / or owner information of the electrically driven vehicle (104); b) comparing the detected identification variable with stored identification variables; c) Starting a bidirectional charging process depending on the comparison; d) Logging an electricity quantity representing an amount of electricity supplied to the vehicle (104) and / or from the vehicle (104) depending on the identification quantity; e) Logging an electricity price quantity representing a fee for the electricity quantity at the respective time; f) Determining a usage fee quantity representing a usage fee depending on the electricity quantity, the electricity price quantity and the identification quantity; e) Outputting the electricity quantity, the electricity price quantity and / or the usage fee quantity depending on the identification quantity by means of an output unit (103).

7. A computer program comprising instructions which cause the device according to any one of claims 1 to 5 to carry out the method steps according to claim 6.

8. A machine-readable storage medium on which the computer program according to claim 7 is stored.

9. Use of a charging device (100) according to one of claims 1 to 5 and / or a method according to claim 6 in charging devices for electric vehicles, fuel cell vehicles, hybrid vehicles, plug-in hybrid vehicles, aircraft, pedelecs and / or e-bikes.

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