KR20160106064A - Method for starting a battery management system - Google Patents

Abstract

The present invention includes at least one main control device 2 and a plurality of module control devices 6-1, 6-2, ... 6-n, which are connected to each other via first and second communication channels To a battery management system (1). The first communication channel 5 has a data bus structure and the second communication channel has a point-to-point structure. The method includes transmitting at least one start signal for the module control devices (6-1, 6-2, ..., 6-n) on the second communication channel by the main control device (2) (6-1, 6-2, ..., 6-n) after confirming the received unique identifier on the first communication channel (5) (6-1, 6-2, ..., 6-n), receiving the identifiers on the first communication channel (5) by the main control device (2) And checking the order by the main control device (2). The invention also relates to a computer program designed to carry out the method, a battery management system (1), a battery and an automobile.

Description

METHOD FOR STARTING A BATTERY MANAGEMENT SYSTEM BACKGROUND OF THE INVENTION [0001]

The present invention includes at least one main control device and a plurality of module control devices connected to each other via first and second communication channels, wherein the first communication channel has a data bus structure and the second communication channel has a point-to-point structure And more particularly, to a start-up method of a battery management system.

The invention also relates to a computer program, a battery management system, a battery and an automobile designed to carry out the method.

Electronic control devices are becoming increasingly popular in the automotive field in recent years, for example engine control devices and control devices for ABS or airbags. For electrically driven vehicles, the current main research topic is the development of high performance battery packs including associated battery management systems, or control devices, equipped with software to monitor battery function. Battery management systems specifically ensure the stable and reliable functioning of the battery cells and battery packs used. Battery management systems monitor and control current, voltage, temperature, insulation resistance and other values for individual cells and / or for the entire battery pack. With these values, management functions that increase the life, reliability, and safety of the battery system can be realized.

Battery management systems consist of a number of control devices in which individual software functions are executed. A control device including a main control device for detecting measurement data directly on individual battery modules and a plurality of sub-module control devices in accordance with the number of battery cells, the number of sensors, and distribution of battery modules in various installation spaces in the vehicle Lt; / RTI > topology is obtained. The detected data is exchanged between the control devices via a communication channel, for example a data bus such as CAN-bus. By using multiple battery modules and associated module control devices, the measurement data is communicated to the main control device at high frequencies on a communication channel. The test frequency is generally limited by the characteristics of the communication channel, such as the bandwidth on the data bus and the number of battery modules.

In order to exchange data between the module control device and the main control device, data must be clearly assigned to the module control devices. To this end, a clear identifier is required, which is stored in the main control device and the associated module control device, whereby the position of the module control device can be clearly assigned in the battery pack.

WO 2012/060755 discloses a battery management system including one main control device and a plurality of module control devices. Here, when the main control device detects a new node, the main control device assigns a clear identifier to the new module control device. Assignment of identifiers is done sequentially. When an identifier is assigned to the first module control device, the main control device transmits a signal that it is ready to accommodate another module control device into the network. The disadvantage of such a system is that the identifiers must be newly allocated each time the system is started. Thus, since the identifiers are distributed differently across the system, as occasion demands, for every new start of the system, the assignment over time must be tracked together.

US 2012/268069 discloses a method of assigning identifiers, wherein a point-to-point network is used. Each slave-control device triggers another slave-control device.

US 2011/273023 discloses a method of assigning identifiers in a battery management system in which a main controller sends a first query to assign an identifier and receives a response from a first module control device, Lt; / RTI >

 SUMMARY OF THE INVENTION [0006] It is an object of the present invention to provide a startup method of a battery management system in which it is achieved to assign a clear identifier to an errory module control device by a main control device so that management functions that increase the life, reliability, . It is also an object of the present invention to provide a computer program, a battery management system, a battery, and a vehicle designed to execute the above method.

And a plurality of module control devices, wherein the first communication channel has a data bus structure and the second communication channel has a point-to-point A method of starting a battery management system having a structure includes the following method steps:

a) transmitting at least one start signal for the module control device by the main control device on the second communication channel,

b) confirming a unique identifier after receipt of the start signal by each module control device,

c) transmitting the identified unique identifier by the respective module control device on the first communication channel,

d) receiving the identifiers on the first communication channel by the main control device, and

e) checking the number and order of the received identifiers by the main control device.

In step a) the module control devices are continuously started via the start signals by the main control device. Alternatively, the main control device may transmit only one start signal, and the module control devices may be designed to transmit the start signal to other module control devices after startup.

The identifiers on the first communication channel are checked by the main controller in step e). If the number and sequence of identifiers match, an accurate system startup can be achieved. The proposed method can be used in battery management systems that are optimized for speed and are prone to time critical startup. Particularly preferably, the method steps a), b), c) and d) can be carried out interlocking with respect to different module control devices, so that in step a) While identifiers already transmitted from other module control devices on the first communication channel are received by the main control device. Further, in step a), after the main control device transmits other start signals for the module control devices on the second communication channel, in step c), for example, the module control device to which the start signal has already been transmitted transmits a unique identifier to the first communication channel It may be sent back to the user.

According to a preferred embodiment, if the check is made in step e) that exactly one identifier has an error, the following method steps are carried out:

f) assigning a new identifier to the module control device having an identifier with an error by the main control device.

If an optimal startup process is not performed in which all the identifiers are clear and error-free, an error is corrected by the main controller without requiring all the identifiers to be newly allocated.

This is the case where the module control device contains a memory with an error and the identifier can no longer be read correctly. In other cases, the module control device may have been replaced, for example, and may not yet have a valid identifier. In these two cases, the module control device sends back a standard identifier, e.g., 0xFF, thus signaling faulty memory or manufacturing settings.

The communication protocol of the first communication channel or the communication channel is preferably designed such that each module control device responds only to messages destined for a unique identifier. Thus, preferably in step f), it may be possible to assign the new identifier to the module control device with the identifier having the error by the main control device on the first communication channel. Module control devices with valid identifiers ignore the message because they are not the recipients of this message. Such a message may be, for example: "The module control device with identifier OxFF receives a new valid identifier CSC2 ".

According to a preferred embodiment the following method steps can be carried out:

g) receiving unfamiliar identifiers by a respective module control device on a first communication channel,

h) comparing unfamiliar identifiers received by each module control device with identified unique identifiers, and

i) if the received identifier matches the unique identifier, incrementing the counter by the respective module control device.

If the unique identifier identified in step c) is transmitted on the first communication channel by the respective module control device, the message can be displayed, for example, as a message for all participants, so that the message can be sent to any of the other module control devices It is not neglected by it. Since the first communication channel has a bus structure having information accessible to all the module control devices, if all of the module control devices are already started, they can receive the identifiers of other module control devices in the startup process. The increment of the counter in step i) is used to enable clear addressing on the first communication channel if multiple module control devices are proved to have the same identifiers.

According to the improvement of the above embodiment, in step e), when a plurality of identifiers are checked as having errors, the following method steps are carried out:

j) assigning a plurality of identifiers to module control devices having erroneous identifiers by the main control device in such a way that addressing of the module control devices with erroneous identifiers is made by the counter.

Thus, the method provides a fallback policy for situations where more than one identifier is to be newly assigned. Clear assignment of new identifiers by the main controller is done by a counter. Thereby, the transmission of the message can again be performed on the first communication channel. The method is given such that an error is corrected by the main control device without all the identifiers needing to be newly allocated, even if an optimal start procedure is not performed, in which all the identifiers are clear and error-free.

According to a preferred embodiment, a second check of all identifiers is performed after assigning one or more new identifiers to the module control devices with the identifiers having errors by the main control device. As a result, it is found that the measures so far have not been sufficient to successfully start the system.

If an error is identified in the second check of identifiers, successive and individual assignments of the identifiers are preferably made by the main controller. To this end, each module control device is started continuously and individually. The main control device assigns a clear identifier to each module control device. Only after the assignment of the identifier to the first module control device is finished, the next module control device is started. Thus, the assignment of the identifiers is intertwined and thus an accelerated implementation is impossible. This measure is applied only when, for example, a serious error due to a defect in the hardware being used appears at the time of allocation. In error-free systems, the proposed method has the advantages described above permanently.

According to the present invention, when a computer program is run on a programmable computer device, a computer program is provided that causes one of the methods described herein to be performed. The computer program may be, for example, a startup program for a battery management system of a vehicle or a module for implementing a battery management system. The computer program may be stored in a removable memory, such as a CD-ROM, a DVD, a USB stick or a memory card, in a mechanically readable storage medium, such as a permanent or rewritable storage medium, . Additionally or alternatively, the computer program may be provided to a computing device, such as a server or a cloud server, for example, for downloading via a data network such as the Internet or via a communication connection such as a telephone line or a wireless connection.

Also according to the present invention there is provided a communication system comprising at least one main control device and a plurality of module control devices designed to carry out one of the methods described above and connected to each other via first and second communication channels, (BMS), wherein the communication channel has a data bus structure and the second communication channel has a point-to-point structure.

Preferably, each module control device includes a comparator and a counter incrementing device for comparing unfamiliar identifiers with unique identifiers, and the counter incrementing device is connected to a comparator which compares unfamiliar identifiers with unique identifiers.

The expressions "battery" and "battery unit" are used herein for a battery or a battery unit in accordance with conventional language usage. The battery includes preferably one or more battery units, which may include a battery cell, a battery module, a module cable or a battery pack. The battery cells are preferably spatially integrated and circuit-connected to one another, for example in series or parallel, to form a module. A plurality of modules can form a so-called battery direct converter (BDC), and a plurality of battery direct converters can form a battery direct inverter (BDI).

According to the present invention, an automobile including such a battery can be provided, and the battery is connected to a driving system of the automobile. Preferably, the method is applied to electrically driven vehicles in which a plurality of battery cells are interconnected to provide the required drive voltage.

Embodiments of the invention are illustrated in the drawings and described in detail below.

1 is a first schematic view of a battery management system,
2 is a second schematic diagram of a battery management system,
The third is a schematic of the method steps according to the invention,
FIG. 4 is a schematic diagram of a start-up process of the battery management system according to the present invention,
5 is another schematic diagram of a starting process of the battery management system according to the present invention,
FIG. 6 is another schematic diagram of a starting process of the battery management system according to the present invention,
7 is another schematic diagram of a starting process of the battery management system according to the present invention and FIG.
8 is another schematic diagram of a starting process of the battery management system according to the present invention.

The battery management system 1 of FIG. 1 includes a main control unit 2, which may be referred to as a BCU (Battery Control Unit), and native module control units 6-1, 6-2,. ... 6-n, respectively. Each battery module 4 is generally assigned with battery units 8 comprising a plurality of battery cells which are connected in series to achieve the required output and energy data by the battery system, And further connected in parallel. The individual battery cells are lithium-ion batteries having a voltage range of, for example, 2.8 to 4.2 volts. Communication between the main control unit 2 and the module control units 6-1, 6-2, ... 6-n is carried out via the first communication channel 5, for example the CAN-bus and suitable interfaces 10, 12 ).

Fig. 2 shows another schematic view of the battery management system 1 of Fig. The battery management system 1 of Fig. 2 includes a main control device 2 and a plurality of battery modules 4 with module control devices 6-1, 6-2, ... 6-n ). And battery units 8 are assigned to each battery module 4. Communication between the main control unit 2 and the module control units 6-1, 6-2, ... 6-n takes place via the first communication channel 5 and the appropriate interfaces 10, 12, Via a second communication channel 7 with suitable interfaces 9, 11.

The second communication channel 7 may also be referred to as a Power_On- signal line in the scope of the present invention. The second communication channel 7 is a signal line from the main control unit 2 to the first module control unit 6-1 and then from the first module control unit 6-1 to the second module control unit 6-1 -2), and so on up to the signal line to the last module control device 6-n. The signal lines of the second communication channel 7 are controlled by respective source control devices, that is, for example, in the case of the signal line from the first module control device 6-1 to the second module control device 6-2 1 module control device 6-1. The main control device 2 can switch on the module control devices 6-1, ..., 6-n only in succession in sequence. The intentional switching-on of the second module control device 6-2, for example by the main control device 2, is not possible in this configuration because the main control device 2 is connected to each individual module control device 6 -1, 6-2, ... 6-n) are not provided.

FIG. 3 shows a schematic diagram of possible states at start-up of the battery management system 1, for example, which has been described with reference to FIGS. The first state 14 is shown as an optimal start-up procedure. Validation of the identifiers of the module control devices 6-1, 6-2, ... 6-n in the first state 14 is performed by referring to the number and order of the identifiers received by the main control device 2 . The battery management system 1 shifts from the first state 1 to the second state 16 when the main controller 2 detects that the identifier is incorrect in the first step S1. In the second state 16, an identifier is newly allocated. If it is detected in the second step S2 that the other identifier is wrong, the system transitions from the second state 16 to the third state 18. In the third state 18 more than one identifier is newly allocated. If it is determined in the third step S3 that a complete new allocation of identifiers is required, the system transitions to the fourth state 20, and all identifiers are newly allocated in the fourth state. Thereby, depending on the nature of the interference, i.e. whether one module control device 6-1, 6-2, ... 6-n has a defect and whether many or all of the module control devices have defects, So that clear identification of the module control devices 6-1, 6-2, ... 6-n is achieved. The battery management system 1 can determine the fourth state 20 immediately in the fourth step S4 so that the system transitions from the first state 14 to the fourth state 20 directly. This is, for example, the case where the first start-up of the battery management system 1 is performed. In this case, all the module control devices 6-1, 6-2, ... 6-n can be programmed with a standard identifier at the time of manufacture.

FIG. 4 is a schematic diagram of a start-up process of the battery management system 1 according to the present invention. In Fig. 4, communication between the main control apparatus 2 and five module control apparatuses 6-1, 6-2, ... 6-5 is illustrated by way of example. In step S5, the main control device 2 transmits the start signal 22, for example, "Start CSC1" via the second communication channel 7 (not shown here). Since the signal is clear because only the connection of the main control unit 2 to the first module control apparatus 6-1 is made via the second communication channel 7, ID CSC1 "stored in the nonvolatile memory to the main control device 2 in step S6. The non-volatile memory can be, for example, an Electrically Erasable Programmable Read-Only Memory (EEPROM), that is, a non-volatile electronic memory chip whose stored information can be electrically erased.

The main control apparatus 2 transmits another start signal 22 having a message "Start CSC2" in another step S5, and then transmits another signal. The implementation of step S5 in the illustrated embodiment is shown several times, i.e., shown separately for each start signal 22. [ 6-n from the respective module control devices 6-1, 6-2, ... 6-n through the lines described with reference to Fig. It can be seen that only one start signal 22 that can be transmitted to the main control device 2 - 6 - n can be transmitted by the main control device 2, so that the module control devices are sequentially triggered.

The transmission of the start signals 22 on the second communication channel 7 in the steps S5 and the transmission of the identifiers 23 on the first communication channel 5 in the steps S6 proceed in conjunction with each other. The main control device 2 can not start the start signal 22 only after receiving the identifier 23 "ID CSC1" of the first module control device 6-1 in the step S6 on the first communication channel 5, Quot; Start CSC4 "

In step S7, the main control unit 2 checks the accuracy of the identifiers 23. The check is made only by the number and order of the received identifiers 23. If the number and order of the identifiers 23 match, the battery management system 1 is placed in the first state 14 as described in connection with FIG.

5 shows another embodiment of the start-up process of the battery management system 1 according to the present invention. This embodiment differs from the first state 14 to the second state 16, Transition is shown. In the illustrated embodiment, the communication between the main control unit 2 and the module control units 6-1, 6-2 and 6-3 is performed. As described in connection with FIG. 4, the transmission of the start signals 22 and the identifiers 23 takes place in steps S5 and S6. A check is made of the identifiers 23 received in step S7.

It is assumed that the second module control device 6-2 has a defect, for example, an EEPROM memory with an error and that the identifier 23 can no longer be read correctly. In this case, the identifier 23 stored in the EEPROM-memory of the second module control device 6-2 corresponds to a standard identifier (so-called default-ID), for example, "0xFF ". The second identifier 23 is detected as being incorrect at the check in step S7. A new identifier 23 is assigned to the detected module control device 6-2 as having a defect in step S8. In step S9, a new identifier 23 is transmitted on the first communication channel 5. [ If the defective module control device 6-2 responds to the start signal 22 with, for example, "ID 0xff ", the message transmitted via the first communication channel 5 is, for example, CSC2 ". Since each of the module control devices 6-1, 6-2 and 6-3 reacts only to messages directed to the unique identifier 23, the first and third module control devices 6-1 and 6-3 Ignores the message and only the second module control device 6-2 receives the message. In step S10, the module control device 6-2 receives a new identifier 23 "CSC2 ".

The start-up method of the battery management system 1 according to the present invention, which has reached the third state 18 as described in connection with Fig. 3, will be described with reference to Fig. Communication is performed between the main control device 2 and the three module control devices 6-1, 6-2 and 6-3, for example. As described in connection with Figures 4 and 5, the transmission of the preference start signals 22 in steps S5 is repeated until the transmission of the identifiers 23 in the steps S6 is completed on the corresponding communication channels 5 , 7). In the illustrated embodiment, it is assumed that the second module control device 6-2 and the third module control device 6-3 have invalid identifiers. The two module control devices 6-2 and 6-3 return the same identifier 23, for example the standard identifier "0xFF ". In step S11, the module control devices 6-2 and 6-3 that have already transmitted the identifier 23 receive the unidentified identifiers 23, that is, the module control devices read the unfamiliar identifiers. In step S12, the module control devices 6-2 and 6-3 compare the received unfamiliar identifiers with the identified unique identifiers 23, and if another module control device transmits an identifier corresponding to the transmitted unique identifier (23) is transmitted. In all cases where the received identifier 23 matches the unique identifier 23, the corresponding module control devices 6-1, 6-2, 6-3 increment the counter. In the illustrated embodiment, the third module control device 6-3 will not read the message of another invalid identifier, since the last module control device 6-3 with the error, . The second errored module control device 6-2, which is started up, will read the message with the identifier 23 that matches the unique identifier 23. The first module control device 6-1 reads the two invalid identifiers 23 but will not increment the counter because the invalid identifiers do not match the unique identifier.

Using the counter, the module control units 6-2 and 6-3 with invalid identifiers 23 can be explicitly addressed by the main control unit 2. [ At the check (S7) of the identifiers 23, the two identifiers 23 appear to be in error. The system is placed in the third state 18 described with reference to Figure 3 and in the third state more than one identifier 23 must be newly allocated. In step S8, the new identifiers 23, for example, the module control devices with the error "CSC with counter 0: CSC receives ID CSC3" and "CSC with counter 1: CSC receives ID CSC2" Lt; / RTI > In step S9, the information is transmitted through the first communication channel 5, so that the information is provided to all the module control devices 6-1, 6-2 and 6-3. Only the module control devices 6-1 and 6-2-6-3 having the error identifier 23 and the correct counter value receive the message in step S14 because the module control device detects the message directed to itself And accepts the new identifier 23 in step S10.

7, there are shown five module control devices 6-1, 6-2, 6-3, 7-3, 8-3, 8-3, 8-3, 8-3 , 6-3, 6-4, 6-5). In step S5, the start signals 22 are transmitted by the main control device 2 to the module control devices 6-1, ..., 6-5, and in step S6, The devices 6-1, ..., 6-5 transmit their identifiers 23 on the first communication channel 5. It is assumed that the module control devices 6-2, 6-3 and 6-4 contain invalid identifiers 23. The identifier is received at step S11 by the second module control device 6-2 at the moment when the third module control device 6-3 transmits the identifier 23, Is compared with the identifier (23). Then, the second module control device 6-2 increments the counter. After the fourth module control device 6-4 transmits the identifier 23, the identifier is received by the second and third module control devices 6-2 and 6-3 in step S11, Is compared with each unique identifier 23 in step S12. Then, the second and third module control devices 6-2 and 6-3 increment the counters. When checked in step S7, the three identifiers 23 in the main control unit 2 are found to be in error and coincide with each other. The system is placed in the third state 18 described with reference to FIG. In step S8 a new identifier 23 is assigned to the second module control device 6-2, in this case an identifier with an error 23 and a module control device 6-2 with a counter coefficient of 2. A new identifier 23 is transmitted to all the module control devices 6-1, ..., 6-5 via the first communication channel 5 in step S9. Only the second module control device 6-2 accepts the message in step S14 because the second module control device detects a message directed to it and in step S10 a new identifier 23 Accept. In the other step S8, a new identifier 23 is assigned to the third module control device 6-3, that is, the identifier 23 with an error and the module control device 6-3 with a counter coefficient 1. A new identifier 23 is transmitted to all the module control devices 6-1, ..., 6-5 via the first communication channel 5 in step S9. Only the third module control device 6-3 receives the message in step S14 because it detects a message directed to it and accepts the new identifier 23 in step S10. Similarly, a new identifier 23 is assigned to the fourth module control device 6-4. Since in step S13 the system is placed in the third state 18 requiring a plurality of new assignments of the identifiers 23 it is determined whether all the identifiers 23 are correctly assigned to the module control devices 6 -1, ... 6-5) for safety reasons.

8 shows a sequential allocation method of the identifiers 23 between the main control apparatus 2 and the three module control apparatuses 6-1, 6-2 and 6-3, . The embodiment of the start-up process shown in FIG. 8 may be provided illustratively if the system is placed in the fourth state 20 described with reference to FIG. For example, the failure of the assignment of the identifiers 23 in the second check S13 described with reference to FIG. 7 can be determined. The cause for the failure of the proceedings described with reference to Figs. 4-7 may be that the reading has failed in step S11, for example. In addition, the module control devices 6-1, ... 6-n may be replaced with new module control devices, in which case the new module control device may have a valid identifier 23 already assigned in the system. Further, the two module control devices 6-1, ..., 6-n in the battery management system 1 may be replaced. At startup, the main control unit 2 determines that the two valid identifiers 23 have not been communicated in the correct order. In this case, a complete new assignment of identifiers 23 is also made, preferably according to Fig.

8, when the first module control apparatus 6-1 transmits the identifier 23 in step S6 in the sequential and individual allocation of the identifiers 23 by the main control apparatus 2 The main control unit 2 will send another start signal 22 to the second module control unit 6-2. When the second module control device 6-2 transfers the identifier 23 to the main control device 2 in step S6 only when the main control device 2 determines in step S5 that the other start signal 22 To the third module control device 6-3. In the case of other (not shown) module control devices, the method proceeds similarly.

The present invention is not limited to the embodiments described herein and the aspects shown therein. Rather, within the scope of the invention as claimed by the claims, a number of variations are possible within the scope of the act of the person skilled in the art.

1 Battery management system
2 Main control unit
6-1, 6-2, ... 6-n module control device
5 First communication channel
7 Second communication channel
22 Start signal
23 Identifiers

Claims (11)

At least one main control device 2 and a plurality of module control devices 6-1, 6-2, ... 6-n, which are connected to each other via first and second communication channels 5, , The first communication channel (5) having a data bus structure and the second communication channel (7) having a point-to-point structure, the method comprising:
a) transmitting at least one start signal (22) for said module control devices (6-1, 6-2 ... 6-n) to said main control device (2) on said second communication channel (S5),
b) confirming the unique identifier (23) after receiving the start signal (22) by each of the module control devices (6-1, 6-2, ..., 6-n)
c) transmitting (S6) the identified unique identifier 23 on the first communication channel 5 by each of the module control devices 6-1, 6-2, ... 6-n,
d) receiving the identifiers (23) by the main control device (2) on the first communication channel (5), and
and e) checking (S7) the number and order of the received identifiers (23) by the main control device (2). The method according to claim 1, wherein, in the step (e), when the identifier (23) is checked to be in error,
f) assigning a new identifier (23) to the module control devices (6-1, 6-2, ..., 6-n) having an identifier with an error by the main control device (2) The battery management system comprising: 3. The method according to claim 1 or 2,
g) receiving (S11) unfamiliar identifiers (23) by the module control devices (6-1, 6-2, ..., 6-n) on the first communication channel (5)
h) comparing the unfamiliar identifiers 23 received by the respective module control devices 6-1, 6-2, ... 6-n with the identified unique identifier 23, And
i) incrementing the counter by each of the corresponding module control devices (6-1, 6-2, ..., 6-n), if the received identifier (23) matches the unique identifier (23) The battery management system comprising: 4. The method according to claim 3, wherein, in step e), when checking is made that the plurality of identifiers (23)
j) the address of the module control devices (6-1, 6-2, ..., 6-n) with identifiers (23) (S8) of a plurality of identifiers (23) to the module control devices (6-1, 6-2, ..., 6-n) having the identifiers (23) The battery management system comprising: 5. Device according to any one of claims 1 to 4, characterized in that said main control device (2) is connected to said module control devices (6-1, 6-2, ...) with identifiers (23) (S13) of all the identifiers (23) after allocating one or a plurality of new identifiers (23) to the plurality of identifiers (6-n). 6. Method according to claim 5, characterized in that sequential and individual assignments of said identifiers (23) are carried out by said main control device (2) when errors are identified in a second check of said identifiers (23) A method of starting a battery management system. A computer program for performing one of the methods according to any one of claims 1 to 6, which is executed on a programmable computer facility. At least one main control device 2 and a plurality of module control devices 6-1, 6-2, ... 6-n, which are connected to each other via first and second communication channels 5, Method according to one of the claims 1 to 6, characterized in that the first communication channel (5) has a data bus structure and the second communication channel (7) has a point-to-point structure A battery management system for performing one method. 9. The system of claim 8, wherein each module control device (6-1, 6-2, ..., 6-n) comprises a comparator and a counter increment device for comparing strange identifiers (23) , The counter incrementing device is connected to a comparator which compares unfamiliar identifiers (23) with the unique identifier (23). A battery comprising the battery management system (1) according to claim 8 or 9. An automobile comprising a battery according to claim 10.

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