WO2018077543A1

WO2018077543A1 - Method, device, and system for evaluating a traction battery

Info

Publication number: WO2018077543A1
Application number: PCT/EP2017/073859
Authority: WO
Inventors: Xin Wang; Christian SCHLASZA; Guenter Siegel
Original assignee: Robert Bosch Gmbh
Priority date: 2016-10-24
Filing date: 2017-09-21
Publication date: 2018-05-03
Also published as: DE102016220860A1

Abstract

The invention relates to the determination of a secondary application for a traction battery. For this purpose, parameters regarding the state of health of a traction battery are determined already during the operation of an electric vehicle or hybrid vehicle with said traction battery and said parameters are transferred to an external evaluation device. Therefore, on the basis of the transferred parameters regarding the state of health, monitoring of the state of health of the traction battery and planning for a future secondary application can be performed already during operation of the electric vehicle or hybrid vehicle with the traction battery.

Description

Description title

Method, apparatus and system for evaluating a traction battery

The present invention relates to a method, an apparatus and a system for evaluating a traction battery. In particular, the present invention relates to the evaluation of a traction battery of an electric or hybrid vehicle.

State of the art

Document DE 10 2014 217 135 A1 discloses a method and a device for determining a state-of-health and a state-of-charge value of a battery. For this purpose, at least one impedance value of the battery is determined at at least one frequency, and an output variable is determined on the basis of the determined impedance value. By comparing the determined values with a preference value, a state-of-health value is then determined.

Electric or hybrid vehicles are powered in whole or in part by electrical energy provided by a traction battery. In order to ensure a sufficient range of such a vehicle, it is necessary that the traction battery used in this case has sufficient storage capacity for the electrical energy. With increasing aging, however, the storage capacity of the traction battery decreases. Therefore, the should

Traction battery to be replaced when the available storage capacity is no longer sufficient to the required range of the vehicle

guarantee. Since very high demands are placed on the storage capacity of the traction batteries of electric and hybrid vehicles, it is quite possible for traction batteries which no longer meet the requirements for an electric or hybrid vehicle, then optionally for another Secondary application, in which the requirements for the

Storage capacity are lower. To do this, the traction battery usually needs to be analyzed after replacement with a new traction battery to determine if the traction battery is in for a planned traction battery

Secondary application is suitable.

Disclosure of the invention

The present invention provides a method for evaluating a

Traction battery according to claim 1, an apparatus for evaluating a

Traction battery according to claim 6 and a system for evaluating a traction battery according to claim 8.

Accordingly, it is provided:

A method for evaluating a traction battery of an electric or

Hybrid vehicle, comprising a step of determining a state-of-health (So H) parameter of the traction battery in the electric or electric vehicle

Hybrid vehicle. The method further comprises the steps of transmitting the determined SoH parameter from the electric or hybrid vehicle to an external evaluation device outside the electric or hybrid vehicle, and a step of determining an application parameter for classifying the traction battery for a predetermined secondary application, wherein determining the Application parameters in the external evaluation device based on the transmitted SoH parameter takes place.

Furthermore, it is provided:

An apparatus for evaluating a traction battery of an electric or hybrid vehicle having a receiving device and an analysis device.

The receiving device is designed to receive a state-of-health (SoH) parameter of a traction battery of an electric or hybrid vehicle. The analysis device is designed to have a

To determine application parameters for classifying the traction battery for a predetermined secondary application. Determining the The application parameter in the analysis device is based on the received So H parameter.

Finally, it is planned:

A system for evaluating a traction battery of an electric or

Hybrid vehicle with an electric vehicle and a device according to the invention for evaluating a traction battery. The electric vehicle includes a traction battery, a testing device and a transmission device. The testing device is designed to be a SoH parameter of

Traction battery of the electric or hybrid vehicle to determine. The

The transmission device is designed to transmit the determined SoH parameter to the device for evaluating the traction battery.

Advantages of the invention

The present invention is based on the finding that the analysis of an aged traction battery of an electric or hybrid vehicle is usually associated with great expense. Conventional analysis methods usually require initially a complex expansion of the traction battery from the electric or hybrid vehicle, possibly a disassembly of the traction battery and then a metrological evaluation of

Traction battery or the individual modules or cells of the traction battery.

The present invention is therefore based on the idea to take this knowledge into account and to provide a method, a device and a system, which already during use of the traction battery in the electric or hybrid vehicle monitoring the

State-of-health (SoH) of the traction battery allows and based on the determined during use of the traction battery in the electric or hybrid vehicle SoH parameters planning for a secondary use of the traction battery or at least individual modules or cells of the traction battery allows , For example, an SoH parameter may contain information about the available maximum storage capacity or the internal resistance of the

Traction battery, or a module or a cell of the traction battery. In particular, by an SoH parameter also a

Modification of the capacitance and / or the internal resistance for a predetermined period of time, a defined energy throughput and / or a predetermined number of charging cycles are described. Further, the SoH parameters may also describe a state of charge, current or voltage provided by the traction battery, a module, or a cell as it adjusts at a defined load after a predetermined time. Furthermore, for example, open circuit voltage at a

predetermined charge state, course of the open circuit voltage during charging and / or discharging, information about a charge balance between the

Cells / modules of the traction battery and / or information about a complex impedance at one or more predetermined frequencies at defined loads the traction battery or individual cells / modules possible.

The SoH parameter may also contain information about loads or

Include traction battery stresses that affect the life of the traction battery. For example, the SoH parameter may also contain information about the current temperature of the

Traction battery include. Furthermore, the SoH parameter can also be a

Information includes whether the temperature at the traction battery has exceeded a predetermined limit. Likewise, the SoH parameter may also include a time history of the temperature at the traction battery. Also information about a particularly fast loading or

Discharge processes can be transmitted as SoH parameters.

According to the invention, during the use of the traction battery in an electric or hybrid vehicle, the health of the traction battery is to be determined regularly and the health status determined to be transmitted to an external evaluation device, for example a cloud or the like. In this external evaluation device, the information about the health of the traction battery can be collected and evaluated. This is already in the operation of the traction battery in the Electric or hybrid vehicle continuous evaluation and analysis of the traction battery possible. The transmission of the SoH parameters from the vehicle to the external evaluation device can in this case in particular wirelessly by means of a radio link or the like. respectively. For example, the transmission over a cellular connection such. As GPRS, U MTS, LTE or even via WLAN, Bluetooth, etc. For example, the transmission may occur periodically during operation of the vehicle.

Alternatively, the determination of the SoH parameters and the transmission to the external evaluation device can also take place at the start or when the vehicle is parked.

Since the SoH parameters of the traction battery to an external

Evaluated evaluation and optionally stored, in the vehicle itself no time-consuming hardware for the evaluation and / or storage of SoH parameters is required. The central storage and processing of the SoH parameters thereby enables efficient processing of the parameters already during use of the traction battery in a vehicle. As a result, progressive aging of the traction battery can be detected early, and based on the data in the external

Evaluation device, a potential use of the traction battery or at least individual modules or cells of the traction battery can be efficiently planned for subsequent reuse in a secondary application. Such reuses in a secondary application may include, for example, use in vehicles with lower requirements, especially for bicycles or tricycles. Furthermore, the aged traction batteries or their modules or cells can be used as energy storage for regenerative energy systems or the like. In addition, any other secondary applications for the traction batteries are possible. Potential secondary applications for the traction batteries can be specified or specified in advance. Thus, on the basis of the present So H parameters, a suitability for one or possibly also a plurality of predetermined secondary applications can be determined in a targeted manner. In particular, it is possible for one or more predetermined

Secondary applications each carry out an evaluation of the traction battery or the individual cells / modules of the traction battery based on the transmitted SoH parameters. Here, for example, for the

predetermined secondary applications are each determined a parameter which describes a measure of the suitability of the traction battery or its cells / modules for the potential secondary applications. In this way, an evaluation can already be made during the primary use of the traction battery and a possible use in a secondary application planned.

According to one embodiment, a separate SoH parameter is determined in the step for determining the SoH parameter for each module and / or for each cell of the traction battery. Accordingly, the determined individual SoH parameters for the modules or cells of the traction battery can also be transmitted individually to the external evaluation device. The external evaluation device can then individually determine the state of health for each module and / or cell of the traction battery and also determine an application parameter separately for each module or cell. Accordingly, in the step of determining the application parameter for each module and / or each cell of the traction battery may individually

Application parameters are determined.

According to one embodiment, the SoH parameter includes a current into the traction battery or a current from the traction battery, a voltage at the traction battery, a temperature of the traction battery, and / or a charge balance between battery cells or battery modules

Traction battery. Further, the SoH parameter may also include an indication of a change in capacity, information about a balance between individual cells or modules of the traction battery, a complex impedance, or other parameters from a battery management system. In particular, the SoH parameter can also be a time course of the aforementioned

Describe parameters. Such parameters allow a good evaluation of the health of the traction battery or the individual modules or cells of the traction battery. In particular, an estimate of the remaining capacity of the traction battery or the individual battery cells or modules are taken.

According to one embodiment, the method comprises a step for

Save the transmitted SoH parameters in the external

Evaluation. Then, in the step for determining the application parameter for the secondary application, the

Application parameters are determined based on a time history of the stored SoH parameters. In this way, a continuous development of the state of health can be included in the planning of the secondary application for the traction battery.

According to one embodiment, the device for evaluating the traction battery comprises a memory device. The memory device is configured to store the received SoH parameters. The

Analyzer may, in this case, set the application parameter based on a time history of the stored SoH parameters.

According to one embodiment, the testing device of the system for

Evaluation of the traction battery in the traction battery of electric or

Hybrid vehicle integrated. This allows a particularly compact design. Alternatively, the test device can also be integrated in a battery management system of the traction battery. According to one embodiment, the transmission device is in the

Electric vehicle designed to apply the determined SoH parameter to the

Transfer device for evaluation of the traction battery when the determined SoH parameter exceeds or falls below a predetermined limit. Accordingly, the data exchange between the

Electric vehicle and the device for evaluating the traction battery can be minimized. In particular, a different transmission strategy can also be defined for different SoH parameters; for example, an SoH parameter or a first group of SoH parameters can be transmitted continuously / regularly, for example at predetermined time intervals. For example, one calculated by a battery management Capacity of the traction battery are routinely transferred to the device for evaluating the traction battery. Furthermore, for example, a second SoH parameter or a second group of predetermined So H parameters can only be transmitted if the corresponding SoH parameter exceeds or falls below a predetermined limit value, for example, a temperature value, a determined current or voltage value or a course of these parameters are transmitted only if the respective value is greater or smaller than a previously defined value. Also, for example, a whole group of So H parameters, eg, a current value and a

(corresponding) voltage value, or any other

Combinations are transmitted together as soon as a predetermined SoH parameter exceeds or falls below a predetermined value.

The above embodiments and developments can, as far as appropriate, combine arbitrarily. Further refinements, further developments and implementations of the invention also include combinations of previously or below that are not explicitly mentioned with respect to FIG

Embodiments described features of the invention. In particular, the person skilled in the art will also consider individual aspects as improvements or

Add supplements to the respective basic forms of the invention.

Brief description of the drawings

The present invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures of the drawings. Showing:

Figure 1: a schematic representation of a system for evaluating a

Traction battery according to an embodiment;

Figure 2: a schematic representation of a traction battery for a

Evaluation according to an embodiment; and FIG. 3 shows a schematic representation of a flowchart on which a method for evaluating a traction battery according to one embodiment is based.

Figure 1 shows a schematic representation of a system for evaluating a traction battery 11 of a vehicle. The vehicle 1 may be, for example, an electric or hybrid vehicle. The vehicle 1 comprises, in addition to the traction battery 11, a test device 12 for determining state-of-health parameters (So H parameters) of the traction battery 11. The determined SoH parameters can subsequently be supplied to a transmission device 13 which determines the determined SoH parameters to an external evaluation device 2 transmits.

For the determination of the SoH parameters, it is possible to use any conventional process, possibly also an already known one.

For example, to determine a SoH parameter, the

Traction battery with an alternating voltage or an alternating current are applied. In this case, a current flowing through the traction battery 11, or adjusting to the traction battery 11

Voltage to be determined. From this, a complex impedance for the traction battery 11 can be determined. This complex impedance can be used as the basis for a statement about the state of health, such as the remaining storage capacity of the traction battery 11. In particular, from the phase shift between current and

Voltage, that is from the imaginary part of the complex impedance of the traction battery 11, a statement about the storage capacity of the

Traction battery 11 and thus determined by the state of health.

To determine the complex impedance of the traction battery 11 either a predetermined alternating current can be impressed and then a self-adjusting voltage is measured, or alternatively, a predetermined AC voltage can be impressed and it will be measured thereby adjusting current. Based on a phase shift between current and voltage and thus from the imaginary part of the thus determined impedance of the traction battery 11, the state of health of the traction battery 11, In particular, the capacity of the traction battery 11 are closed. Accordingly, therefore, for example, information about current and voltage, about the determined impedance or possibly also only via a phase shift between current and voltage as SoH parameters can be determined.

Alternatively, for example, a predetermined current pulse can be applied to the traction battery 11. Subsequently, from the thereby adjusting voltage response also on the storage capacity of the

Traction battery 11 are closed. In addition, any other methods are possible to determine information about the health of the traction battery 11.

In particular, in addition to a single SoH parameter for the entire traction battery 11, an SoH parameter can also be determined individually for each module of the traction battery 11 or for each individual cell of the traction battery 11.

The one or more determined SoH parameters are determined by the

Transmission device 13 in the vehicle 1 to an external

Evaluation device 2 transferred. A receiving device 23 in the external evaluation device 2 receives the transmitted SoH parameters and provides them to an analysis device 22. The analyzer 22 evaluates the received SoH parameters. For example, the analyzer 22 may first process the received SoH parameters to calculate more detailed health information from the received raw SoH parameters. For example, one possible

Reduction of the electrical storage capacity of the traction battery or the individual modules or cells in the traction battery 11 can be determined.

In addition, in addition or alternatively, further information about an aging condition or the like is possible. In particular, the SoH parameters determined by the test device 12 in the vehicle 1 may also include a temperature or a temperature profile. By evaluating the temperature or the temperature profile of the traction battery 11, information about the aging of the traction battery 11 can be generated. Further For example, the test device 12 in the vehicle 1 can also acquire information about a charge balance between individual cells or modules of the traction battery 11 and forward them as SoH parameters. If, for example, it is found that certain cells or modules of the traction battery 11 are always less heavily charged than others after a charging process, this may indicate an increased aging or a reduction in capacity of these modules or cells. If, for example, the capacity of a battery cell or of a battery module drops, such a battery cell or battery module achieves a higher relative charge state faster during a charging process (eg 80% of the remaining storage capacity). As a result, this battery cell / battery module becomes higher

Adjust open circuit voltage. As a result, for example, unequal aging or an imbalance in the storage capacity of the battery cells / modules can be inferred. In addition, are

Of course, any other parameters or information about the health of the traction battery 11 possible. In particular, a change in the capacitance and / or the internal resistance for a predefined period of time can define a defined one by means of a SoH parameter or optionally also by a combination of several So H parameters

Energy throughput and / or a predetermined number of charging cycles are described. Further, one or more SoH parameters may also include one from the traction battery, a module, or a cell

State of charge, a supplied current or a voltage are described, as he / she sets at a defined load after a predetermined time. Furthermore, for example, open circuit voltage at a

Cells / modules of the traction battery and / or information about a complex impedance at one or more predetermined frequencies at defined loads the traction battery or individual cells / modules possible. In addition to information on a current value of the aforementioned parameters, the SoH parameters can also be used to describe a temporal course of the parameters. In this case, the transmission of the SoH parameters from the vehicle 1 to the external evaluation device 2 can in particular be effected wirelessly by means of a

Radio connection or similar respectively. For example, the transmission over a cellular connection, e.g. GPRS, UMTS, LTE or also over WLAN, Bluetooth etc. take place. The transmission can take place, for example, periodically during the operation of the vehicle 1. Alternatively, the determination of the SoH parameters and the transmission to the external evaluation device 2 can also take place in each case when starting or when parking the vehicle 1. Furthermore, it is also possible that only SoH parameters are transmitted which exceed or fall short of a predetermined limit value.

In the external evaluation device 2, the SoH parameters determined in the vehicle 1 are received, further processed and optionally stored. For example, the received SoH parameters as raw data or possibly even as prepared information about the

Health condition of the traction battery 11 are stored in a memory device 21. For this purpose, the stored data with a

Timestamp be provided. In this way, a time course of the health of the traction battery 11 can be determined.

The analysis device 22 of the external evaluation device 2 can then, based on the received SoH data and optionally based on additional data stored in the memory device 22, the data

State of health of the traction battery 11 and possibly an individual health status for individual modules or cells of the

Traction battery 11 determine. In particular, it can be determined that the health of the traction battery 11 no longer meets the specified requirements for use in an electrical or

Hybrid vehicle corresponds. For example, it can be determined that the available storage capacity of the traction battery 11 falls below a predetermined limit value. For example, it may be determined that a traction battery that has less than 80% of its original storage capacity is no longer suitable for use in an electric or hybrid vehicle. In addition, also any other parameters are evaluated to check whether the traction battery 11 is still suitable for use in an electric or hybrid vehicle.

If it is determined that the traction battery 11 no longer meets the specified requirements for use in an electric or hybrid vehicle, then corresponding information can be generated. This information can be transmitted, for example, from the external evaluation device 2 to the vehicle 1. The vehicle 1 may then issue, for example, any warning to prompt a user of the vehicle to replace the traction battery 11. Additionally or alternatively, the information about the falling below a predetermined limit value for the health status can be forwarded to any other instance. For example, a service workshop can be informed, which then requests the owner of the vehicle 1 to initiate a service appointment for replacement of the traction battery 11. Furthermore, the transmitted SoH parameters and the health status determined therefrom can also be used to analyze the development of the traction battery 11 during use in the electric or hybrid vehicle.

For example, health information may be evaluated as a basis for further development of future traction batteries.

After the health of the traction battery 11, in particular the maximum storage capacity of the traction battery 11, has deteriorated to the extent that another use in an electric or hybrid vehicle is not further attached, the traction battery 11 may be against another

Traction battery to be replaced. However, the traction battery 11 having the deteriorated health condition may then be used as desired for other purposes with less stringent requirements. For this purpose, the current state of health of the traction battery 11 can be evaluated based on the transmitted SoH parameters in the analysis device 22. Since the current information about the

Health condition of the traction battery 11 are already available during the use of the traction battery 11 in the vehicle 1, the

Analyzer 22 based on the current So H parameters - and possibly on the time course of previous SoH parameters - determine a suitable use for reuse of the traction battery. Consequently, it is already in the replacement of the traction battery 11 in the

Vehicle 1 by the external evaluation device 2 a concrete proposal for a possible secondary application of the traction battery 11 before. A

subsequent, additional complex analysis of the traction battery 11 after replacement from the vehicle 1 is therefore not required.

Already during use of the traction battery 11 in the primary application in the vehicle 1, a possible use for a

To schedule a secondary application, the transmitted SoH parameters can be analyzed and evaluated. For this purpose, for example, one or more secondary applications for traction batteries can be specified. In particular, respective application profiles can be defined for these predetermined secondary applications of the traction battery. These

For example, application profiles may describe minimum requirements for SoH parameters that include a traction battery 11 or

Must meet cells / modules of the traction battery 11 for each secondary application. Further information, in particular information regarding the SoH parameters for characterizing the respective secondary application, is also possible. Based on these application profiles for the given secondary applications or possibly also further specifications for potential secondary applications, a measure for the suitability of the traction battery 11 or the cells / modules of the traction battery 11 can then be determined. For example, it can be determined whether or in how far the

specified requirements for a planned secondary application are met or even exceeded. For this purpose, for example, an application parameter can be calculated which describes a measure of suitability of the traction battery 11 or of the cells / modules of the traction battery 11. In particular, the application parameter may be the suitability of the traction battery

11 or characterize the cells / modules of the traction battery 11 in any way. For example, the application parameter may comprise a scalar numerical value with a defined range of values, eg between 0 and 1. In addition, a vector or the like is possible, wherein each element of the vector, for example, a match with a parameter of a specified in the application profile. Further, any other formats for the application parameter are possible to describe suitability for a given secondary application of the traction battery 11. For the planning of a secondary application of the traction battery, for example, the traction battery 11 can be considered as a whole.

In particular, based on the previously transmitted SoH parameters, a prognosis about the future aging behavior of the

Traction battery 11 possible. Furthermore, predictions may also be made as to the course of development of the capacity of the traction battery 11 based on the transmitted So H parameters. In addition, of course, any further analyzes based on the transmitted So H parameters are possible. For example, the SoH parameters received and stored in the external evaluation device 2 can also be used for quality management and / or for the development of new or novel traction batteries.

The external evaluation device 2 can not only receive SoH parameters of a single traction battery from a single electric or hybrid vehicle. Instead, the external evaluation device 2 can receive SoH parameters from a plurality of vehicles, for example a vehicle fleet or the like. Optionally, SoH parameters of further traction batteries may also be used in the analysis of the health status of a

Traction battery 11 to be involved. For example, when analyzing the SoH parameters of other traction batteries, it is found that after a given event, a particularly large change in the

Health status of the traction battery, then these indications may also be used to appropriately evaluate the traction battery 11 as soon as a corresponding event is identified based on the received SoH parameters.

The received SoH parameters of the traction battery 11, as well as the SoH parameters of other traction batteries of other vehicles can be stored together in the external evaluation device 2 and processed as desired. It is also possible, for example, that means suitable interfaces other external users or more

Analysis devices to those in the external evaluation device. 2

stored So H parameters can access.

FIG. 2 shows a schematic representation of a traction battery 11 on which an embodiment is based. The traction battery 11 comprises a plurality of battery cells or battery modules 11-i. The individual battery cells or

Battery modules 11-i are each electrically connected to a test device 12. In this way, the test device 12, the individual

Individually check battery cells or battery modules 11-i and determine individual SoH parameters. The individual SoH parameters for the individual battery cells or modules 11-i can then be connected to the external

Evaluation device 2 are transmitted. In one embodiment, the test device 12 is integrated in the traction battery 11. In this way, a particularly compact design can be realized, and it must not be the individual terminals of the respective battery cells or battery modules 11 -i individually led to the outside.

Alternatively, it is also possible to determine the SoH parameters of the traction battery 11 by means of a battery management system of the electric or hybrid vehicle 1.

FIG. 3 shows a schematic representation of a flow chart on which a method for evaluating a traction battery of an electric or hybrid vehicle is based. In step S1, at least one SoH parameter of the traction battery 11 in the vehicle 1 is determined. This SoH parameter is then transmitted in step S2 from the vehicle 1 to an external evaluation device 2 outside the vehicle 1. The transmission can take place, for example, by means of the transmission device 13 described above. In step S3, an application parameter for a

Secondary application of the traction battery 11 determines. The determination of the application parameter takes place in the external evaluation device 2 based on the transmitted SoH parameter. In particular, as described above, a SoH parameter can be determined and transmitted individually for each module or cell of the traction battery. In this case can be customized for battery cell or each battery module

Application parameters are determined.

Furthermore, it is also possible to store the transmitted SoH parameters, if necessary to provide them with a time stamp, and to follow a history of the development of the SoH parameters from the history of the past SoH parameters

Determine the health status of the traction battery and include it in the definition of the secondary application.

In summary, the present invention relates to determining a secondary application for a traction battery. For this purpose, parameters are already determined during the operation of an electric or hybrid vehicle with a traction battery on the health of the traction battery and transmitted to an external evaluation device. Thus, based on the transmitted health parameters, monitoring of the health of the traction battery and scheduling for future secondary use may already occur during operation of the electric or hybrid vehicle with the traction battery.

Claims

claims

A method of evaluating a traction battery (11) of an electric or hybrid vehicle, comprising the steps of:

Determining (Sl) a State of Health, SoH, Parameters of

Traction battery (11) in the electric or hybrid vehicle;

Transmitting (S2) the determined SoH parameter from the electric or hybrid vehicle to an external device for evaluating the traction battery (11) outside the electric or hybrid vehicle; and

Determining (S3) an application parameter for classifying the traction battery for a predetermined secondary application, wherein determining (S3) the application parameter in the external

Device based on the transmitted SoH parameter is done.

The method of claim 1, wherein the step of determining the SoH parameter for each module and / or cell (11-i) of the

Traction battery (11) determines a separate SoH parameter.

The method of claim 2, wherein the step (S3) of determining an application parameter for each module and / or cell (11-i) of the traction battery (11) determines an individual application parameter.

4. The method of claim 1, wherein the SoH parameter is a current to / from the traction battery, a voltage of the traction battery, or individual battery cells / modules, a temperature of the Traction battery (11) and / or a charge balance between battery cells or battery modules (11-i) of Traction battery (11) and / or a time course of this

Includes parameters.

Method according to one of claims 1 to 4, comprising a step of storing the transmitted SoH parameters in the external device for evaluating the traction battery (11), wherein the step (S3) for determining an application parameter, the application parameter based on a time history of the stored SoH parameters set.

Apparatus (2) for evaluating a traction battery (11) of an electric or hybrid vehicle (1), comprising: receiving means (23) adapted to provide a state of health, SoH, traction battery (11) parameter an electric or hybrid vehicle (1) to receive; an analysis device (22) which is designed to have a

Determine application parameters for a classification of the traction battery (11) for a predetermined secondary application (11) based on the received SoH parameter.

Apparatus (2) according to claim 6, further comprising memory means (21) adapted to store the received SoH parameter, the analyzing means (22) being adapted to operate the

Set application parameters for the predetermined secondary application of the traction battery (11) based on a time history of the stored SoH parameter.

A system for evaluating a traction battery (11) of an electric or hybrid vehicle, comprising: a device (2) for evaluating a traction battery (11) according to claim 6 or 7, and a vehicle (1), comprising: a traction battery (11), a tester (12) adapted to have a SoH parameter of the traction battery (11) of the electric or electric vehicle

Hybrid vehicle (1) to determine, and a transmission device (13) which is adapted to transmit the determined SoH parameter to the device (2) for evaluating a traction batteries.

9. System according to claim 8, wherein the test device (22) in the

Traction battery (11) of the electric or hybrid vehicle and / or in a battery management system of the traction battery (11) is integrated.

10. The system of claim 8 or 9, wherein the transmission means (13) of the electric or hybrid vehicle transmits the determined SoH parameter to the device (2) for evaluating a traction battery (11) when the determined SoH parameter over a predetermined limit - or falls below.