Method for configuring a high-voltage storage system of a motor vehicle

Abstract

The invention relates to a method (100) for configuring a high-voltage storage system (20) of a motor vehicle (10), having the steps of detecting configuration data of a high-voltage storage device (21), storing the configuration data in a non-volatile memory unit (12) of the motor vehicle (10), and storing the configuration data in at least one volatile memory unit (22) of the motor vehicle (10).

Description

[0001] Method for configuring a high-voltage storage system of a motor vehicle

[0002] The invention relates to a method for configuring a high-voltage storage system of a motor vehicle, comprising steps of acquiring configuration data of a high-voltage storage system and storing the configuration data in a non-volatile memory of the vehicle. Furthermore, the invention relates to a method for operating a high-voltage storage system and a high-voltage storage system for a motor vehicle.

[0003] High-voltage storage systems, also known as traction batteries or accumulators, are used to provide electrical energy to power electric vehicle drives. Such high-voltage storage systems can, for example, have different battery cell configurations and / or storage components depending on the manufacturer. To ensure optimal or optimized operation of a high-voltage storage system depending on its design, such configuration information must be taken into account during operation or control of the high-voltage storage system to avoid overloading and / or use that could lead to damage.

[0004] In order to clearly identify a high-voltage storage device in the application and thus operate it in an optimized manner according to its configuration, known solutions use coding resistors, particularly on current-carrying lines in the storage space. This can lead to a significant increase in weight. Additionally or alternatively, high-voltage storage devices could be operated based on a reduced standard data set, as the lowest common denominator, whereby minimal, reliable application data are applied for all known high-voltage storage device configurations. However, this prevents a high-voltage storage device from being operated to its full capacity, which leads to suboptimal operation. Against this background, it is an object of the invention to improve the operational reliability of a high-voltage storage device or high-voltage storage system for a motor vehicle.In particular, a configuration procedure for a high-voltage storage system is to be improved to enable manipulation detection.

[0005] This object is achieved by a method for configuring a high-voltage storage system having the features of claim 1, a method for operating a high-voltage storage system having the features of claim 6 and a high-voltage storage system having the features of claim 9. The dependent claims relate to advantageous developments of the invention.

[0006] According to a first aspect, a method for configuring a high-voltage storage system of a motor vehicle is specified, comprising steps of acquiring configuration data of a high-voltage storage device, storing the configuration data in a non-volatile memory of the vehicle, and storing the configuration data in at least one volatile memory of the vehicle or a volatile memory of the high-voltage storage system or high-voltage storage device.

[0007] By storing the configuration data, which in particular contains essential operating information for the operation of the high-voltage storage device, redundantly and in different memories or storage media, a comparison of the stored configuration data is possible. Furthermore, safe operation of the high-voltage storage device or high-voltage storage system is enabled by redundantly providing the data required for operation in at least two different memories.

[0008] According to a further aspect, a method for operating a high-voltage storage system is specified, wherein the high-voltage storage system is configured by means of a method described herein, comprising steps of reading the stored configuration data from the non-volatile memory, reading the stored configuration data from the volatile memory, and activating a special operating mode for the high-voltage storage device if a comparison of the stored configuration data of both memories results in a discrepancy.

[0009] Since data from a volatile memory is erased when its power supply is interrupted, a verification process that includes comparing the stored configuration data of both memories can indicate such an interruption in its power supply and thus potential tampering with the high-voltage storage device or high-voltage storage system. This can improve the safety of the high-voltage storage device's operation because, if a configuration data comparison fails in a special operating mode, for example, (re-)commissioning can be prevented and / or, if necessary, emergency operation can be enabled to prevent damage to the high-voltage storage device due to unsuitable operation or control, particularly on the software side.

[0010] A high-voltage storage system typically comprises at least one high-voltage storage device, a control unit, and in particular a consumer, for example an electric motor or other vehicle component. The control unit can be configured to operate the high-voltage storage device, in particular depending on an operating state of the consumer. A high-voltage storage device is in particular an energy storage device or a drive battery or accumulator, which in particular comprises several modules with battery cells connected in parallel and in series. High-voltage storage devices and their battery cells and / or components, such as cell contact systems or cooling systems, can, for example, comprise different materials and / or complexities, which must be taken into account during operation of the high-voltage storage device in order not to compromise safety and / or to enable optimized operation, in particular improved capacity utilization.Such information is particularly included in the configuration data of the high-voltage storage system. When recording configuration data of the high-voltage storage system, information relating to the high-voltage storage system can be read out and / or fed in or specified, particularly during production, which is necessary for proper, safe and / or optimized operation. Depending on the configuration data, for example, a suitable driver package for control and / or a functionality for the high-voltage storage system or a control unit associated with it can be selected, applied and / or stored. The configuration data can, in particular, include operating parameters of the high-voltage storage system that are necessary for optimized operation or full capacity utilization of the battery cells or the high-voltage storage system.

[0011] When the configuration data is stored, this data, particularly digital data, is stored on a data carrier or memory for later access. In particular, the data can be input or stored on the production side and / or distributed by a central control device, in particular, to at least one non-volatile and at least one volatile memory, and stored or filed there.

[0012] For the purposes of the present invention, a non-volatile memory, or permanent or read-only memory, is understood to mean, in particular, data storage devices whose stored information or data is permanently retained, even when the memory or a computing device comprising the memory is not in operation and / or is not supplied with power or energy. Such a non-volatile memory can also be referred to as a read-only memory and can be designed independently or be a subunit of a computing or control device or a control unit of the high-voltage storage system and / or the vehicle or a drive train of the vehicle.

[0013] A volatile memory is, in particular, a memory or storage medium that requires power or energy to retain data, particularly permanently. If such a volatile memory is disconnected from its power supply, the stored data is erased. Such a volatile memory can also be referred to as main memory and can be independent or a subunit of a computing or control device or a control unit of the high-voltage storage system.

[0014] The invention is based, among other things, on the idea of ​​storing information about the high-voltage storage system, particularly during the production phase of the high-voltage storage system or a vehicle with such a high-voltage storage system, in different control units. To enable tamper detection, volatile and non-volatile memories or memory areas are used to store such data. These volatile and non-volatile memories or memory areas can, for example, be distributed across at least one master and at least one partner control unit. In this case, it is provided that the at least one volatile memory is connected to a permanent or permanent power supply.If the component containing the storage device is disconnected from this power supply, for example, due to manipulation or removal, the stored configuration data is lost, and a comparison of the configuration data with the configuration data permanently stored in the non-volatile memory is no longer possible or indicates a discrepancy. This can enable the detection of an electrical and / or functional incorrect and / or faulty installation of the high-voltage storage device. In such a case, for example, an error message can be generated and / or a special operating mode can be initiated or applied for the high-voltage storage device, the high-voltage storage system, and / or the vehicle.

[0015] In one embodiment, the volatile memory is supplied with energy by the high-voltage storage device. In particular, the volatile memory is exclusively connected to the high-voltage storage device for energy supply, so that if the memory is disconnected from the high-voltage storage device or the memory and / or high-voltage storage device are disconnected from the vehicle's electrical system, the stored configuration data is deleted. This allows a comparison of the stored configuration data to generate an error signal, which can reveal tampering, for example, in the form of cross-swapping components.

[0016] In one embodiment, the volatile memory is a monitoring circuit of the high-voltage storage device. Such a monitoring circuit, or a Cell Supervisory Circuit (CSC), is, in particular, an electronic circuit configured to ensure uniform charge distribution among the individual batteries or battery packs of a high-voltage storage device. Since this monitoring circuit is supplied with energy directly by the high-voltage storage device, a volatile memory located there can be provided without additional effort. This can enable a reduction in the costs of tamper monitoring and detection.

[0017] In one embodiment, the configuration data comprises at least one piece of information relating to a particularly unique hardware ID of the high-voltage storage device. A hardware ID is, in particular, a manufacturer-defined identification string that can assign an application or a hardware- or configuration-specific application data set to the high-voltage storage device. The unique identification of the high-voltage storage device thus allows, for example, a predetermined and thus secure software or operating strategy to be selected and / or applied for operation, so that operational damage can be avoided and the high-voltage storage device can be operated in an optimized manner.

[0018] In one embodiment, the configuration data comprise at least one piece of installation information. In this case, installation information is, in particular, information relating to cell contacting or a cell contacting system, cell chemistry of the battery cells, information relating to a thermal sensor, a cooling device and / or the like. This makes it possible to provide further specific information for controlling or operating the high-voltage storage device, whereby a specific application data set for operating the high-voltage storage device can be loaded and / or used. In one embodiment, the configuration data is read out and / or compared by a control unit of the vehicle. In this case, a comparison of the configuration data can take place, in particular when the vehicle is started or when an attempt is made to start the vehicle, and if the comparison is unsuccessful, the special operating mode can be activated.This can, for example, prevent the energy storage unit or high-voltage storage unit from being connected to the vehicle's high-voltage electrical system or enable it in a safety mode.

[0019] In one embodiment, the at least one non-volatile memory is part of the vehicle's control unit. The control unit can function, for example, as a master control unit, which distributes the configuration data to partner control units, particularly on the production side. This ensures that the partner control units and the master control unit are trained to each other or communicatively connected, for example, via unique hardware IDs. This allows redundant storage of information to be achieved with reduced effort.

[0020] In one embodiment, the high-voltage storage device has a monitoring circuit (CSC) that can be supplied with energy by the high-voltage storage device, with this monitoring circuit forming the volatile memory. This makes it possible to achieve the effects and advantages already described.

[0021] Further advantages and possible applications of the invention will become apparent from the following description in conjunction with the figures.

[0022] Fig. 1 shows a schematic representation of a vehicle having an exemplary high-voltage storage system according to the present invention. Fig. 2 shows a schematic flow diagram of an exemplary method according to the invention for configuring a high-voltage storage system of a motor vehicle.

[0023] Fig. 3 shows a schematic flow diagram of an exemplary method according to the invention for operating a high-voltage storage system.

[0024] Fig. 1 shows a motor vehicle 10 having a high-voltage storage system 20 according to an embodiment of the present invention.

[0025] The high-voltage storage system 20 has a control unit 11 and a high-voltage storage device 21. The control unit 11 is configured to acquire configuration data of the high-voltage storage device 21 and to store the configuration data in a non-volatile memory 12 of the vehicle 10, in this case a non-volatile memory area of ​​the control unit 11. Furthermore, the control unit 11 is configured to store the configuration data in at least one volatile memory 22 of the vehicle 10 and / or the high-voltage storage device 21. In the illustrated embodiment, the volatile memory 22 is formed by a monitoring circuit 22 of the high-voltage storage device 21, wherein the monitoring circuit 22 is supplied with energy by means of the high-voltage storage device 21.

[0026] In addition, the control unit 11 can be configured to read configuration data from the non-volatile memory 12 and the volatile memory 22 and to compare this configuration data from both memories 12, 22 and to determine a deviation in the configuration data. If the control unit 11 determines a deviation, the control unit 11 can determine and / or apply a special operating mode for the high-voltage storage device 21, the high-voltage storage system 20 and / or the vehicle 10. In such a special operating mode, for example, commissioning can be prevented and / or operation with a reduced load on the high-voltage storage device 21 can be enabled. Fig. 2 shows an exemplary flow diagram of a method 100 for configuring a high-voltage storage system 20 of a motor vehicle 10.

[0027] In a first step a, configuration data of a high-voltage storage device 21 are acquired, in particular by means of a control unit 11 of the motor vehicle 10 or the high-voltage storage system 20. The configuration data can include, for example, a hardware ID of the high-voltage storage device 21 and at least one piece of installation information for the high-voltage storage device 21. In a further step b, the configuration data are stored in a non-volatile memory 12 of the motor vehicle 10. The non-volatile memory 11 can, for example, be a memory area of ​​the control unit 11.

[0028] In a further step c, the configuration data are filed or stored in at least one volatile memory 22 of the motor vehicle 10 or the high-voltage storage device 21. This allows the configuration data to be stored redundantly and, in particular, to be retained for use in a comparison of the stored configuration data.

[0029] Fig. 3 shows an exemplary flow diagram of a method 200 for operating a high-voltage storage system 20 of a motor vehicle 10.

[0030] In steps a to c, a high-voltage storage system 21 of a motor vehicle 10 is configured as described with reference to Fig. 2. In a step d, the configuration data is read from the non-volatile memory 12, and in a step e, the configuration data is read from the volatile memory 22. This can be done, for example, by means of a control unit 11 of the motor vehicle 10 or of the high-voltage storage system 20.

[0031] In a step f, a special operating mode is activated for the high-voltage storage device 21, the high-voltage storage system 20 and / or the motor vehicle 10 if a comparison of the configuration data of both memories 12, 22 reveals a discrepancy in the configuration data. Because data stored in the volatile memory 22 or the configuration data are deleted when the memory 22 is disconnected from its power supply, a comparison of the configuration data in such a case will reveal that the configuration data stored in the memories 12, 22 do not match because the configuration data stored in the volatile memory 22 is no longer present. This makes it possible to detect tampering with the high-voltage storage device 21 or the high-voltage storage system 20, and to initiate a secure operating mode for the high-voltage storage device 21 to protect it from damage.

[0032] LIST OF REFERENCE SYMBOLS

[0033] 10 motor vehicle

[0034] 11 Control unit

[0035] 12 non-volatile memory 20 high-voltage storage system

[0036] 21 high-voltage storage units

[0037] 22 volatile memory

[0038] 100 Configuration Procedures

[0039] 200 Procedures for Operating a - f Steps

Claims

CLAIMS 1. Method (100) for configuring a high-voltage storage system (20) of a motor vehicle (10), comprising the following steps: a) detecting configuration data of a high-voltage storage system (21), b) storing the configuration data in a non-volatile memory (12) of the motor vehicle (10), and c) storing the configuration data in at least one volatile memory (22) of the motor vehicle (10).

2. Method (100) according to the preceding claim, wherein the volatile memory (22) is supplied with energy by means of the high-voltage storage device (20).

3. Method (100) according to one of the preceding claims, wherein the volatile memory (22) is a monitoring circuit of the high-voltage storage device (21).

4. Method (100) according to one of the preceding claims, wherein the configuration data comprise at least one piece of information relating to a hardware ID of the high-voltage storage device (21).

5. Method (100) according to one of the preceding claims, wherein the configuration data comprise at least one piece of installation information of the high-voltage storage device (21).

6. Method (200) for operating a high-voltage storage system (20) of a motor vehicle (10), wherein the high-voltage storage system (20) is configured by means of a method (100) according to one of the preceding claims, comprising the following steps: d) reading the stored configuration data from the non-volatile memory (12), e) reading the stored configuration data from the volatile memory (22), and f) activating a special operating mode for the high-voltage storage device (21) if a comparison of the stored configuration data of both memories (12, 22) 7. Method (200) according to the preceding claim, wherein the reading and / or comparing of the configuration data is carried out by a control unit (11) of the motor vehicle (10).

8. Method (200) according to the preceding claim, wherein the at least one non-volatile memory (12) is integrated in the control unit (11).

9. High-voltage storage system (20) for a motor vehicle (10), comprising a control unit (11) and a high-voltage storage device (21), wherein the control unit (11) is configured to acquire configuration data of a high-voltage storage device (21), to store the configuration data in a non-volatile memory (12) of the motor vehicle (10) and in at least one volatile memory (22) of the motor vehicle (10) and / or of the high-voltage storage device (21).

10. High-voltage storage system, wherein the high-voltage storage device has a monitoring circuit which can be supplied with energy by means of the high-voltage storage device, and this monitoring circuit forms the volatile memory.

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