KR101561885B1 - System and method for identifier allowcation of multi-bms - Google Patents

System and method for identifier allowcation of multi-bms Download PDF

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KR101561885B1
KR101561885B1 KR1020110124347A KR20110124347A KR101561885B1 KR 101561885 B1 KR101561885 B1 KR 101561885B1 KR 1020110124347 A KR1020110124347 A KR 1020110124347A KR 20110124347 A KR20110124347 A KR 20110124347A KR 101561885 B1 KR101561885 B1 KR 101561885B1
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South Korea
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bms
identifier
communication network
bmss
unique communication
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KR1020110124347A
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Korean (ko)
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KR20130058373A (en
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고종경
박재동
김현진
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주식회사 엘지화학
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48Accumulators combined with arrangements for measuring, testing or indicating condition, e.g. level or density of the electrolyte
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially

Abstract

An identifier allocation method and system for a multi-BMS of a battery pack are disclosed. A system for assigning a unique communication identifier to a multi-BMS of a battery pack, the system including N BMSs (N is an integer equal to or greater than 2) connected to a parallel communication network and sequentially connected through a serial communication network, Sets itself to the master BMS, applies a start signal to the second BMS through the serial communication network, and sends a start signal to the slave according to the kth BMS (2? K? N-1, k is an integer) A first BMS for assigning a corresponding unique communication identifier; And a communication unit for communicating with the first BMS through the parallel communication network to allocate a unique communication identifier corresponding to the slave and relaying the activation signal to an adjacent BMS, The second through the N < th > BMSs. According to the present invention, a master BMS and a slave BMS can be set in advance for a multi-BMS, or a master BMS and a slave BMS can be distinguished from each other without having separate hardware for specifying a master / slave.

Description

[0001] SYSTEM AND METHOD FOR IDENTIFIER ALLOWOCATION OF MULTI-BMS [0002]

The present invention relates to a system and method for setting an identifier in each BMS of a battery pack having a multi-BMS structure, and more particularly, to a system and method for setting an identifier by using a serial communication network and a parallel communication network in combination.

Secondary batteries having high electrical characteristics such as high energy density and high ease of application according to the product group can be used not only as a portable device but also as an electric vehicle (EV) or a hybrid vehicle (HV) driven by an electric driving source, Devices (Energy Storage System) and so on. Such a secondary battery is not only a primary advantage that the use of fossil fuel can be drastically reduced, but also produces no by-products resulting from the use of energy, and thus is attracting attention as a new energy source for enhancing environmental friendliness and energy efficiency.

The battery pack applied to the electric vehicle has a structure in which a plurality of cell assemblies including a plurality of unit cells are connected in series in order to obtain high output. The unit cell includes a positive electrode and a negative electrode current collector, a separator, an active material, an electrolyte, and the like, and can be repeatedly charged and discharged by an electrochemical reaction between the components.

In addition to this basic structure, the battery pack can be used as a power supply control for a driving load of a motor or the like, an electric characteristic value measurement such as a current or a voltage, a charging / discharging control, a voltage equalization control, a state of charge A battery management system (BMS) for monitoring and controlling the state of the secondary battery is further included.

In recent years, there has been a growing demand for a multi-module battery pack in which a plurality of battery modules are connected in series and / or in parallel with each other as a need for a large-capacity structure increases.

Since the battery pack of such a multi-module structure includes a plurality of batteries, there is a limitation in controlling the charge / discharge state of all the batteries using one BMS. Therefore, recently, a BMS is installed for each battery module included in a battery pack, one of the BMSs is designated as a master BMS, remaining BMSs are designated as a slave BMS, and the charge / discharge of each battery module is performed by a master- Technology is used.

In the master-slave mode, the master BMS communicates with the slave BMS in order to integrally manage charge and discharge of the battery module included in the battery pack to collect various charge and discharge monitor data related to the battery module of the slave BMS, And transmits a control command for controlling the charge / discharge operation of the module to the corresponding slave BMS.

In order to transmit data collection or control commands through the communication network, an identifier (ID) that can be used by the master BMS to uniquely identify each slave BMS must be previously allocated to each slave BMS.

A method in which a master BMS reads identifier information previously stored in a hardware circuit of a slave BMS or a master BMS assigns an identifier for each slave BMS by a program algorithm and a master BMS transmits an identifier to each slave BMS is used have.

However, this conventional method is premised on that the master BMS and the slave BMS are separated and set separately. Therefore, if the master BMS and the slave BMS are not set in advance, the execution of the identifier assignment logic can not be started. In addition, there is a disadvantage that a hardware circuit for storing an identifier is separately required, and a high-performance processor is required for executing a complicated software algorithm.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a battery pack having a multi-BMS structure in which a master BMS and a slave BMS need not be preset and there is no separate hardware circuit for presetting an identifier or setting an identifier It is an object of the present invention to provide a system and a method for allocating an identifier by a simple algorithm.

According to an aspect of the present invention, there is provided an identifier allocation system including a plurality of BMSs (N is an integer of 2 or more) connected to a parallel communication network and sequentially connected through a serial communication network, A master BMS for receiving a master start signal, setting itself as a master BMS, applying a start signal to a second BMS through the serial communication network, and transmitting a kth BMS (2? K? N-1 a first BMS for assigning a unique communication identifier corresponding to a slave according to a unique communication identifier allocation request signal of the first communication terminal; And a communication unit for communicating with the first BMS through the parallel communication network to allocate a unique communication identifier corresponding to the slave and relaying the activation signal to an adjacent BMS, The second through the N < th > BMSs.

According to an aspect of the present invention, the serial communication network is a daisy chain, and the parallel communication network is a CAN (Controller Area Network) communication network.

According to another aspect of the present invention, the first BMS allocates unique communication identifiers associated with the startup sequence of each BMS to the second through the Nth BMSs.

Preferably, the second to the N-th BMSs are masked so as not to receive a unique communication identifier after being assigned a unique communication identifier corresponding to the slave.

Preferably, when the first BMS allocates a unique communication identifier corresponding to a slave to the k-th BMS and fails to receive a unique communication identifier allocation request signal from the (k + 1) th BMS within a predetermined time, The process for allocating an identifier is terminated.

Meanwhile, the master start signal may be applied to any one of a BMS arranged first, a BMS arranged last, and a BMS arranged in the middle based on N sequentially arranged BMSs.

In order to accomplish the above object, the identifier allocation system according to the present invention may be embedded in a battery pack or may be constructed as a separate system from a battery pack.

Further, the battery pack including the identifier allocation system according to the present invention may be a component of the battery drive system including a load supplied from the battery pack.

According to another aspect of the present invention, there is provided a method of allocating a unique communication network identifier to first through N th BMSs (N is an integer of 2 or more) connected to a parallel communication network and sequentially connected through a serial communication network (A) the first BMS receiving a master start signal and setting itself as a master BMS; And (b) a kth BMS (2 ≤ k ≤ N-1, k is an integer) activates the (k + 1) th BMS in a relay manner through the serial communication network, and the first BMS operates in conjunction with the activation of each BMS And allocating a unique communication identifier corresponding to the slave to the (k + 1) th BMS by communicating with the (k + 1) th BMS based on the parallel communication network.

According to an aspect of the present invention, a master BMS and a slave BMS can be preset for a multi-BMS, or a master BMS and a slave BMS can be distinguished from each other without a separate hardware for designating a master / slave, .

According to another aspect of the present invention, there is no need for pre-setting the master and slave, pre-inputting the identifier, and additional process for the separate hardware configuration, so that the manufacturing time of the battery pack having the multi-BMS structure is shortened, It is possible.

According to another aspect of the present invention, there is no possibility of duplication of identifiers because the identifiers are sequentially assigned to the multi-BMS using a parallel communication network and a serial communication network. Accordingly, even if a part of the multi-BMS is newly replaced or the identifier is already installed, it is possible to operate the identifier so that the identifiers do not overlap with each other, thereby improving the adaptability to expansion or installation of the BMS and improving the reliability of the battery pack.

According to another aspect of the present invention, even when replacing a new BMS in a battery pack, an operator can omit an operation of individually identifying an identifier for a BMS, thereby improving work efficiency for replacement and the like, Errors can be minimized or prevented.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further the understanding of the technical idea of the invention, And should not be construed as limiting.
1 is a block diagram showing an overall configuration of an identifier allocation system of a multi-BMS structure according to an embodiment of the present invention.
2 is a flowchart illustrating a process of an identifier allocation method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a block diagram showing an overall configuration of an identifier allocation system 10 of a multi-BMS structure according to an embodiment of the present invention.

Referring to FIG. 1, an identifier allocation system 10 according to an embodiment of the present invention includes a BMS 12, 14, 16, ..., N configured with first through N th BMSs (N is an integer of 2 or more) And a serial communication network 20 and a parallel communication network 30 connecting them.

The first to Nth BMSs 12, 14, 16, ..., N are the same BMS (Battery Management System) to which the algorithm for assigning a unique communication identifier according to the present invention is applied.

Each of the first through N-th BMSs 12, 14, 16, ..., N may control one or more battery cells of its own. In FIG. 1, Not shown. The control functions of the first through N-th BMSs 12, 14, 16, ..., N include charging and discharging control, equalization control, switching, electrical characteristic value measurement and monitoring, electronic control functions applicable at the level of a person skilled in the art (hereinafter, " those skilled in the art ") including control of off-state, state of charge (SOC) measurement and the like.

The first to Nth BMSs 12, 14, 16, ..., N are connected to two communication networks required for unique communication identifier assignment. The two communication networks are the serial communication network 20 and the parallel communication network 30. The serial communication network 20 is used when one of the adjacent BMSs applies a start signal to the other in a relay manner. The parallel communication network 30 is used to transmit and receive information for the first to Nth BMSs 12, 14, 16, ..., N to receive a unique communication identifier.

Preferably, the serial communication network 20 is a daisy chain. A daisy chain is a bus connection that is connected continuously. The daisy chain supports a signal transmission scheme that allows one device in the chain to relay signals to other devices, unlike a simple bus connection. All daisy-chained devices can carry the same signal, but the device that received the signal does not transmit or modulate the signal to other devices.

According to the present invention, in the N BMSs connected in a daisy chain, a k-th BMS (2? K? N-1, k is an integer) that first receives a start signal for activating the BMS is transmitted to the k + Do not transmit immediately. That is, the k-th BMS receives the start signal and starts the operation, and communicates with the BMS operating as the master. After receiving the unique communication identifier, the k-th BMS transmits the BMS activation signal to the (k + 1) th BMS through the daisy chain. Similarly, the (k + 1) th BMS receiving the BMS activation signal also transmits the BMS activation signal to the (k + 2) th BMS after completing the process of assigning the unique communication identifier. Accordingly, the N BMSs are sequentially activated at a predetermined time interval, and are assigned unique communication identifiers.

Preferably, the parallel communication network 30 is a CAN (Controller Area Network) communication network. Since the CAN communication network is a well-known communication network to those skilled in the art, a detailed description thereof will be omitted.

In the N BMSs (N is an integer of 2 or more), the BMS receiving the master start signal is the first BMS 12. The first BMS 12 receiving the master start signal sets itself to the master BMS after starting operation.

The first BMS 12 that has designated itself as a master allocates a unique communication identifier corresponding to the slave to the remaining BMSs 14, 16, ..., N, Collects monitor information on the state of charge (SOC), and transmits a control signal for equalizing the battery to the slave BMS.

The master start signal is a signal for activating the entirety of the identifier assignment system 10. For example, when the battery pack including the identifier allocation system 10 is mounted on an electric vehicle, the master start signal may be input from an electronic control unit (ECU) mounted on the electric vehicle when the start button of the user is operated.

The master start signal is applied to only one of N BMSs (N is an integer of 2 or more). In the embodiment of the present invention shown in FIG. 1, a master start signal is applied to the leftmost BMS among N BMSs (N is an integer of 2 or more). However, the master start signal can be applied to the last placed BMS or the intermediate placed BMS based on the sequentially arranged N BMSs.

Accordingly, it is preferable that the N BMSs have substantially the same hardware configuration. In particular, it is preferable that the BMSs include a connector port to which a conductor through which a master start signal is transmitted can be coupled. In this case, the BMS connected to the connector port becomes the master BMS, and the remaining BMSs become the slave BMS.

The second to Nth BMSs 14, 16, ..., N are BMSs receiving a start signal through the serial communication network 20, and set themselves as a slave BMS. The slave BMS communicates with the master BMS and collects and transmits the electric state information of the battery cell managed by the slave BMS or controls charging / discharging of the battery according to the criteria set by the master BMS.

According to the present invention, the distinction between the master BMS and the slave BMS is not performed through a separate preset. Instead, the BMS receiving the master start signal among the BMSs having the same hardware configuration and operation algorithm sets itself as the master BMS, and the BMS receiving the start signal from the adjacent BMS sets itself as the slave BMS. That is, whether the master or slave is determined according to the type of the signal received in the BMS startup process.

This configuration is advantageous in that the master BMS and the slave BMS can be distinguished from the master BMS and the slave BMS without a separate hardware configuration for master or slave designation.

The first BMS 12 masters itself by receiving a master start signal and then applies a start signal to the second BMS 14, which is an adjacent BMS, through the serial communication network 20. The second BMS 14 refers to a BMS that receives a start signal from the first BMS 12 among N BMSs (N is an integer of 2 or more) irrespective of the position of the BMS.

The start signal is a signal to awake the BMS in the sleep state. The initiating signal is also a signal informing the second BMS 14 of the progress of the process for assigning the unique communication identifier.

The start signal may be applied not only to the first BMS 12 but also to the (k + 1) th BMS to which a kth BMS (2? K? N-1, k is an integer) allocated with a unique communication identifier is applied. The start signal is applied in a relay manner in accordance with the characteristics of the serial communication network 20. [ Therefore, the second BMS 12 is sequentially activated to the Nth BMS (N).

Meanwhile, the first BMS 12 communicates with the sequentially activated k-th BMS (2? K? N-1, k is an integer) through the parallel communication network 30 to assign a unique communication identifier.

More specifically, the k-th BMS (2? K? N-1, k is an integer) that has been activated through the application of the activation signal identifies itself as a slave BMS and transmits the first BMS 12 And transmits a unique communication identifier allocation request signal to the base station.

The unique communication identifier allocation request signal is a signal indicating that the BMSs 14, 16, ..., N, which have recognized themselves as a slave BMS, are ready to be assigned a unique communication identifier to the first BMS 12 set as the master BMS to be.

When the unique communication ID assignment request signal is transmitted to the first BMS 12, the first BMS 12 calculates a unique communication ID different from the communication ID assigned to the other BMSs 12, Lt; / RTI > Then, the k < th > BMS receives and stores the unique communication communication identifier, and then transmits to the first BMS 12 an Ack signal indicating that the unique communication identifier has been normally received. If the first BMS 12 succeeds in receiving the Ack signal, the identifier allocation process for the k-th BMS is completed.

On the other hand, the k-th BMS is assigned a unique communication identifier from the first BMS 12 and then applied to the (k + 1) th BMS through the serial communication network 30 through the start signal. Then, the (k + 1) th BMS also communicates with the first BMS 12 in the same manner as described above, assigns and stores a unique communication identifier, and applies a start signal to the adjacent BMS. When the BMS activation and the unique communication identifier allocation process are repeated by relaying the activation signal, the process of assigning unique communication identifiers to the second BMS to the Nth BMS 14, 16, ..., N is sequentially performed Is completed.

Preferably, the unique communication identifier is associated with the activation order of each BMS so that they do not overlap with each other. That is, the first BMS 12 recognizes the start order of each BMS based on a time point at which the unique communication identifier allocation request signal is received through the parallel communication network 30. Then, the unique communication identifiers are sequentially increased or sequentially decreased according to the recognized activation sequence, and the unique communication identifiers are allocated and transmitted to the corresponding BMS through the parallel communication network 30. There is no possibility of duplication of identifiers among BMSs.

For example, when assigning the 29 bits identifier of the eCAN communication network to the second BMS to the Nth BMS 14, 16, ..., N, the second BMS 14, which is activated first, . The next lowest value identifier may be assigned to the third BMS 16 to be activated next, and the highest value identifier may be assigned to the Nth BMS (N) that is activated most recently. It is obvious that the opposite case of this example is also possible.

Meanwhile, various embodiments for preventing duplication of a unique communication identifier such as a unique communication identifier allocation by a previously stored database are possible, and the present invention is not limited to the above example.

According to the present invention, it is preferable that the second to the N-th BMS perform a masking setting so that no unique communication identifier is assigned after receiving the unique communication identifier.

The unique communication identifier is transmitted and received through the parallel communication network 30. All the BMSs can receive the data signal related to the unique communication identifier that the first BMS 12 assigns to the k-th BMS (2? K? N-1, k is an integer) due to the characteristics of the parallel communication network 30. Therefore, the BMS, which is assigned the unique communication identifier, is set not to be assigned the unique communication identifier any more, thereby preventing the error that the identifier is redundantly allocated.

Preferably, the first BMS allocates a unique communication identifier to the BMS in a specific order, and if the unique communication identifier allocation request signal is not received from another BMS within a predetermined time, the unique communication identifier allocation process is terminated.

In the identifier allocation system according to the present invention, the total number of BMSs can be applied to a predetermined battery pack, but the number of BMSs can be applied to a battery pack for which the number of BMSs is not defined. If the total number of BMSs is predetermined, assigning all the predetermined number of unique communication identifiers automatically terminates the process. However, if the total number of BMSs is not predetermined, a criterion for terminating the unique communication identifier assignment process is needed.

The k + 1th BMS (2? k? N-1, k is an integer) receiving the start signal from the kth BMS (2? k? N-1, k is an integer) And transmits an identifier allocation request signal. However, if all the BMSs are allocated a unique communication identifier and there is no more BMS to receive the activation signal, there is no BMS to send the unique communication identifier allocation request signal. Accordingly, if the first BMS 12 does not receive the unique communication identifier allocation request signal within a predetermined time, it can be determined that all the BMSs have been allocated a unique communication identifier, and the process can be terminated.

The preset waiting time can be set in various ways. For example, the waiting time can be set in consideration of the time taken for the activation signal to be transmitted between adjacent BMSs, the communication speed of the serial communication network 20 and the parallel communication network 30, and the data processing speed of each BMS .

The identifier allocation system according to the present invention may be a component of a battery pack including a plurality of battery cells. That is, the plurality of battery cells may be divided into N groups, and each cell group may be combined with N multi-BMSs in a 1: 1 relationship. It is apparent that battery cells in each cell group can be connected in series and / or in parallel.

Further, the identifier assignment system according to the present invention can be a component of a battery powered system including a battery and a load supplied with power from the battery.

Examples of the battery driving system include an electric vehicle (EV), a hybrid vehicle (HEV), an electric bicycle (E-Bike), a power tool, an energy storage system, an uninterruptible power supply (UPS) A portable computer, a portable telephone, a portable audio device, a portable video device, and the like. An example of the load is a power supply provided by a motor or a battery that provides a rotational force by the power supplied from the battery. The power conversion circuit may be a power conversion circuit that converts the power to the power.

Hereinafter, a unique communication identifier allocation method corresponding to the operation mechanism of the system will be described.

However, a repetitive description of the configuration of the identifier allocation system 10 (BMS, serial communication network (daisy chain) and parallel communication network (CAN communication network)), master start signal, start signal, It will be omitted.

2 is a flowchart illustrating a flow of an identifier allocation method according to an embodiment of the present invention.

First, a master start signal is inputted to an identifier allocation system 10 in which a plurality of identical BMSs to which an algorithm for assigning a unique communication identifier according to the present invention is similarly applied.

For convenience of explanation, it is assumed that a conductor to which the master start signal is applied is connected to a first BMS of a plurality of BMSs, that is, a connector provided in the first BMS 12. In this case, the master start signal input to the system 10 is applied to the first BMS 12.

When the master start signal is applied, the first BMS 12 switches from the sleep mode to the wakeup mode and determines whether the input signal is the master start signal (S202).

If the input signal is the master start signal (YES in step S202), the first BMS 12 sets itself to the master BMS (S203). Then, the first BMS 12 transmits a start signal to the adjacent second BMS 14 through the serial communication network 20 (S204).

When the start signal is applied to the second BMS 14, the second BMS 14 switches from the sleep mode to the wake-up mode, and then executes the algorithm shown in Fig. That is, the second BMS 14 confirms that the signal received through the serial communication network 20 in step S202 is not the master start signal (NO in S202), and then the process proceeds to step S206, (S206). If the received signal corresponds to a start signal, the second BMS 14 sets itself as a slave BMS (S207). Then, the second BMS 14 transmits a unique communication identifier allocation request signal to the first BMS 12 through the parallel communication network 30 (S208).

Here, all the communication signals for the unique communication identifier allocation except for the start signal are transmitted / received through the parallel communication network 30. Therefore, it is assumed that data and message communication between the first BMS 12 and the second BMS 14 to the Nth BMS (N) use the parallel communication network 30 unless otherwise stated in the following description.

In parallel with step S208, the first BMS 12 monitors whether a unique communication identifier allocation request signal is received through the parallel communication network 30 (S210). When the monitor result unique communication identifier allocation request signal is received (S210: YES), the first BMS 12 proceeds to a process for allocating a unique communication identifier.

First, the first BMS 12 recognizes the order of the BMS transmitting the unique communication identifier allocation request signal (S212). The startup sequence recognition of the BMS has already been described in detail as one scheme for preventing duplication of identifiers when assigning unique communication identifiers. Of course, step S212 is not essential.

Next, the first BMS 12 assigns a unique communication identifier corresponding to the slave to the second BMS 14 that has transmitted the unique communication identifier allocation request signal (S214). The unique communication identifier may be allocated in association with the activation sequence of the BMS, or may be allocated in a manner of sequentially increasing or decreasing sequentially on a constant basis. Alternatively, the unique communication identifier may be previously determined and stored in a lookup table, It is also possible to arbitrarily select and allocate a unique communication identifier so as not to be duplicated in the table.

In step S218, the second BMS 14 monitors whether a unique communication identifier is received from the first BMS 12 after transmitting the unique communication identifier allocation request signal in step S208. If the unique communication identifier is received from the first BMS 12, the second BMS 14 stores the unique communication identifier (S218) and performs masking processing so as not to re-allocate the unique communication identifier (S220). When the first BMS 12 performs communication for allocating a unique communication ID to the other BMS 12, the re-assignment of the unique communication ID is prevented even if the communication signal is transmitted to the second BMS 14.

Next, the second BMS 14 transmits an Ack confirmation message to the first BMS 12 indicating that the unique communication identifier has been allocated (S222). Meanwhile, in step S214, the first BMS 12 transmits a unique communication identifier to the second BMS 14 and monitors whether the Ack confirmation message is received. If the Ack confirmation message is received (YES in S224), the first BMS 12 transmits an activation signal application request message to the second BMS 14 (S226). The first BMS 12 then transitions the process to step S210 and waits for the start of the unique communication identifier assignment process for the other slave BMS.

The start signaling request message is a message instructing the BMS having the unique communication identifier to transmit a signal for activating an adjacent BMS to which the BMS has not yet been assigned a unique communication identifier through the serial communication network 20. [

The second BMS 14 monitors whether the first BMS 12 receives the start signal application request message after transmitting the Ack confirmation message in step S222. If the start signaling request message is received (S228: YES), the second BMS 14 transmits an activation signal to the adjacent third BMS 16 via the serial communication network 20 (S230). The third BMS 16 receiving the start signal from the second BMS 14 sets itself as a slave BMS through steps S202 and S206 (S207). The third BMS 16 also communicates with the first BMS 12 substantially the same as the second BMS 14 and is assigned a unique communication identifier corresponding to the slave BMS.

As described above, the k-th BMS (2? K? N, k is an integer) receives a start signal in a relay manner and sets itself as a slave BMS. Then, the first BMS 12 allocates a unique communication identifier to each BMS through the steps S210, S212, S214, S224 and S226 to the sequentially activated kth BMS (2? K? N, k is an integer) do.

In the description of the identifier allocation method according to the present invention, a process of allocating a unique communication identifier between the first BMS 12 and the second BMS 14 has been described for the sake of understanding. However, a separate algorithm is not applied to the master BMS and the slave BMS, but both the algorithm corresponding to the master BMS (YES in S202) and the algorithm corresponding to the slave BMS (NO in S202) are all applied to the respective BMSs . Thus, each BMS may branch the process at step S202 to execute the algorithm at the master point of view or execute the algorithm at the slave point of view, depending on whether or not it receives the master start signal.

Meanwhile, the identifier assigning method according to the present invention may further include a process for terminating the unique communication identifier assigning process.

That is, the first BMS 12 set as the master BMS monitors whether or not to receive the unique communication identifier allocation request signal in step S210, and if it does not receive the unique communication identifier allocation request signal for a predetermined period of time (NO in S210) The process proceeds to step S232 to determine whether the signal monitoring time exceeds a predetermined reference waiting time (S232). If the reference waiting time has not elapsed (NO in S232), there is a possibility that a BMS that has not yet been assigned a unique communication identifier exists. Therefore, the first BMS 12 shifts the process to step S210 and receives a unique communication identifier allocation request signal And continues to monitor whether or not. On the other hand, when the reference waiting time has elapsed, the first BMS 12 judges that the unique communication identifier is allocated to all BMSs (YES in S232).

In the above-described embodiment, the Nth BMS (N), which is the last BMS, no longer receives an activation signal after receiving a unique communication identifier. Accordingly, the first BMS 12 does not receive the unique communication identifier request signal within a predetermined reference waiting time. If such a situation is detected, it is determined that the unique communication identifier allocation is completed to all the BMSs, and the identifier allocation process is terminated. That is, the first BMS 12 transmits a unique communication identifier allocation complete message to the k-th BMS (2? K? N, k is an integer) set in the slave BMS (S234) and assigns a unique communication identifier to each BMS Terminate the process.

According to an aspect of the present invention, a master BMS and a slave BMS can be preset for a multi-BMS, or a master BMS and a slave BMS can be distinguished from each other without a separate hardware for designating a master / slave, . Further, since it is not necessary to pre-set masters and slaves, pre-input identifiers, and additional processes for separate hardware configuration, it is possible to shorten the manufacturing time of the battery pack having a multi-BMS structure and reduce the manufacturing cost. In addition, since identifiers are sequentially assigned to the multi-BMS using a parallel communication network and a serial communication network, there is no possibility of duplication of identifiers. Accordingly, even if a part of the multi-BMS is newly replaced or the identifier is already installed, it is possible to operate the identifier so that the identifiers do not overlap with each other, thereby improving the adaptability to expansion or installation of the BMS and improving the reliability of the battery pack. Furthermore, even when replacing a new BMS in a battery pack, it is possible to omit an operation for identifying an identifier for the BMS by a worker, thereby improving work efficiency for replacement and minimizing or preventing system errors due to erroneous mounting have.

Meanwhile, in describing the present invention, each configuration of the identifier allocation system of the present invention shown in FIG. 1 should be understood as a logical component rather than a physically separated component.

That is, since each configuration corresponds to a logical component for realizing the technical idea of the present invention, even if each component is integrated or separated, if the functions performed by the logical configuration of the present invention can be realized, And it is to be understood that any component that performs the same or similar function should be construed as being within the scope of the present invention irrespective of the consistency of the name.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

10: Identifier assignment system 12: First BMS
14: second BMS 16: third BMS
N: Nth BMS 20: Serial communication network
30: Parallel communication network

Claims (16)

1. An identifier allocation system for allocating a unique communication identifier for N BMSs (N is an integer greater than or equal to 2) included in a battery pack,
A parallel communication network connecting all of the N BMSs;
A serial communication network for sequentially connecting the N BMSs in a relay manner;
Receiving a master start signal and establishing itself as a master BMS and applying an activation signal to any one of the N BMSs via the serial communication network and transmitting the start signal to at least one BMS among the N BMSs through the parallel communication network A first BMS for assigning a unique communication identifier corresponding to a slave corresponding to the received unique communication identifier allocation request signal; And
And starts communication in response to an activation signal applied through the serial communication network and performs communication with the first BMS set in the master BMS through the parallel communication network to assign unique communication IDs corresponding to the slave from the first BMS And a second to an Nth BMS for applying the start signal to an adjacent subordinate BMS in a relay manner through the serial communication network.
The method according to claim 1,
Wherein the serial communication network is a daisy chain.
The method according to claim 1,
Wherein the parallel communication network is a CAN (Controller Area Network) communication network.
The method according to claim 1,
Wherein the first BMS allocates a unique communication identifier to each BMS in association with an activation sequence of each BMS.
The method according to claim 1,
Wherein the second to N < th > BMSs perform a masking setting so that no unique communication identifier is allocated after the unique communication identifier corresponding to the slave is allocated.
The method according to claim 1,
The first BMS allocates a unique communication identifier corresponding to a slave to any one of the N BMSs and then assigns a unique communication identifier from the next BMS to which the activation signal is applied from the one BMS within a predetermined time And terminates the unique communication identifier assigning process if the request signal is not received.
The method according to claim 1,
Wherein the master start signal is applied to one of a first BMS and a last BMS based on sequentially arranged N BMSs.
A battery pack comprising an identifier assignment system according to any one of claims 1 to 7.
The battery pack according to claim 8, And
And a load supplied with power from the battery pack.
10. The method of claim 9,
Wherein the load is an electric drive means or a portable device.
An identifier allocation method for allocating a unique communication identifier to N BMSs connected to each other by a parallel communication network and sequentially connected in a relay manner by a serial communication network as N BMSs (N is an integer of 2 or more) included in the battery pack As a result,
The first BMS of the N BMSs receiving the master start signal and setting itself as the master BMS;
The BMS of any one of the N BMSs, except for the first BMS, receives a start signal through the serial communication network and starts up the BMS;
Transmitting the unique communication identifier allocation request signal to the first BMS through the parallel communication network;
Allocating a unique communication identifier corresponding to a slave through the parallel communication network in response to a unique communication identifier allocation request signal received from any one of the BMSs to which the first BMS has transmitted the unique communication identifier allocation request signal; And
The one BMS to which the unique communication identifier is assigned applies a start signal to the adjacent BMS in the relay manner via the serial communication network;
And assigning the identifier to the identifier.
12. The method of claim 11,
Wherein the serial communication network is a daisy chain.
12. The method of claim 11,
Wherein the parallel communication network is a CAN (Controller Area Network) communication network.
12. The method of claim 11,
Wherein the first BMS assigns a unique communication identifier to any one of the BMSs in association with the activation sequence of the one BMS in the step of assigning the unique communication identifier.
12. The method of claim 11,
After assigning the unique communication identifier,
And performing masking setting so that any one of the BMSs to which the unique communication identifier is allocated is not assigned a unique communication identifier any more.
12. The method of claim 11,
After assigning the unique communication identifier,
And terminating the unique communication identifier allocation process when the first BMS fails to receive a unique communication identifier allocation request signal from a next-highest ranked BMS within a predetermined time after allocating the unique communication identifier Wherein the identifier assigning step comprises:
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000010902A (en) 1998-06-23 2000-01-14 Futaba Corp Daisy chain connecting device and its address setting method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000010902A (en) 1998-06-23 2000-01-14 Futaba Corp Daisy chain connecting device and its address setting method

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