METHOD FOR OPERATING AN ELECTRICAL ENERGY STORE

Abstract

The invention relates to a method for operating an electrical energy store, comprising a storage cell for storing electrical energy and a control unit, wherein the control unit is designed to detect status variables of the electrical energy store, wherein status variables detected by the control unit are transmitted to a computer unit outside the electrical energy store, and wherein an operation of the electrical energy store occurs on the basis of operating parameters provided by the computer unit.

Claims

1. A method for operating an electrical energy store (12), which comprises a storage cell (14) for storing electrical energy and a control unit (16), wherein the control unit (16) is configured to detect state variables of the electrical energy store (12), the method comprising: detecting state variables via the control unit (16); transmitting the state variables detected by the control unit to a computation unit outside of the electrical energy store (12), and operating the electrical energy store (12) based on operating parameters provided by the computation unit.

2. The method as claimed in claim 1, wherein the operating parameters provided by the computation unit are determined using the state variables detected by the control unit (16).

3. The method as claimed in claim 2, wherein the operating parameters are identified using models, wherein the models are suitable for identifying estimated state variables of the electrical energy store (12) from the detected state variables of the electrical energy store (12) and the operating parameters are identified proceeding from the estimated state variables.

4. The method as claimed in claim 2, wherein the operating parameters provided by the computation unit are identified by means of neural networks.

5. The method as claimed in claim 1, wherein the computation unit is a cloud (20).

6. The method as claimed in claim 5, wherein the electrical energy store (12) is located in a vehicle (10) and a connection between the control unit (16) and the cloud (20) is effected via a wireless communication module (18).

7. The method as claimed in claim 6, wherein the control unit (16) stores values of the operating parameters provided by the cloud (20) and uses these to operate the electrical energy store (12) until updated values of the operating parameters are available from the cloud (20).

8. A device configured to operate an electrical energy store (12), which comprises a storage cell (14) for storing electrical energy and a control unit (16), wherein the control unit (16) is configured to detect state variables of the electrical energy store (12); transmit the state variables to a computation unit outside of the electrical energy store (12), and operate the electrical energy store (12) based on operating parameters provided by the computation unit.

9. A non-transitory, computer-readable medium containing instructions that when executed by a computer cause the computer to control an energy store to detect state variables of the electrical energy store (12); transmit the state variables to a computation unit outside of the electrical energy store (12), and operate the electrical energy store (12) based on operating parameters provided by the computation unit.

10. An electrical energy store (12), which comprises the device as claimed in claim 8.

11. (canceled)

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] An exemplary embodiment of the invention is presented in more detail below. In this case:

[0012] FIG. 1 shows a schematic illustration of a vehicle having an electrical energy store;

[0013] FIG. 2 shows a schematic illustration of the procedure of an exemplary embodiment of the method according to the invention.

DETAILED DESCRIPTION

[0014] FIG. 1 shows a schematic illustration of a vehicle (10), which comprises an electrical energy store (12), a wireless communication module (18) and an electric motor (17). The electrical energy store (12) provides electrical energy to operate the electric motor (17). The electrical energy store (12) is connected to the wireless communication module (18) via a signal line. The electrical energy store (12) comprises a storage cell (14) and a control unit (16), which may be, in particular, a battery management system (BMS). The wireless communication module (18) is configured to establish a connection with a cloud (20), which represents a computation unit. In an alternative configuration, the communication between the electrical energy store (12) and the wireless communication module (18) does not take place directly but via a vehicle control unit, for example a VCU, which is not illustrated in FIG. 1.

[0015] FIG. 2 shows a schematic procedure of an exemplary embodiment of the method according to the invention. The exemplary embodiment starts in step 100. Step 110 subsequently follows.

[0016] In step 110, the control unit (16) detects state variables of the electrical energy store (12). The detected state variables may be, in particular, a temperature, a voltage, a current and/or a charge. Step 120 subsequently follows step 110.

[0017] In step 120, the state variables detected in step 110 are transmitted to the cloud (20) by means of the wireless communication module (18). Step 130 subsequently follows step 120.

[0018] In step 130, operating parameters are received by means of the wireless communication module (18), wherein the operating parameters have been determined proceeding from the state variables detected in step 110 and transmitted in step 120. Step 140 subsequently follows step 130.

[0019] In step 140, the electrical energy store (12) is operated using the operating parameters received in step 130. Step 100 subsequently follows step 140 again, wherein a delay of a predeterminable period can be provided between step 140 and step 100 being carried out again.

[0020] Step 125 can optionally take place between step 120 and step 130. In step 125, the operating parameters are estimated by the cloud (20) proceeding from the transmitted state variables. For this, it is possible that the cloud (20) uses the state variables transmitted in step 120 as input variables for a model, which is suitable for estimating estimated state variables of the electrical energy store from the measured state variables, that is to say, for example, the overall physical state of the electrical energy store is derived proceeding from the detected state variables. Using further models or, for example, also using neural networks, an operating parameter, which may also be, in particular, an estimated state variable, can be determined proceeding from the estimated state variables. In this case, operating parameters may be all physical variables found in operation of the electrical energy store (12). For example, an operating parameter may be the internal resistance of the electrical energy store (12).

[0021] Owing to the exemplary embodiment of the method according to the invention that is presented, it is possible to operate the electrical energy store (12) more efficiently since more accurate knowledge about the operating parameters required to operate the electrical energy store (12) can be obtained than would be possible by way of estimation by the control unit (16). The exemplary embodiment of the method according to the invention that is presented can be used, for example, to optimize recuperation, a rapid charging process, a range strategy of the vehicle (10) or a prediction of a remaining service life of the electrical energy store (12).