KR101969763B1 - Battery management system and method for assigning communication id - Google Patents

Abstract

A battery management system and a communication ID assignment method are disclosed. The battery management system according to an embodiment of the present invention includes a battery management module for providing a communication ID setting signal and a plurality of cell monitoring modules for providing a response signal to the battery management module to the communication ID setting signal, And the battery management module allocates a communication ID for each of the plurality of cell monitoring modules based on the response signal.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery management system,

Embodiments of the present invention relate to a method of assigning an ID for communication in a battery management system and a battery management system.

The Hybrid Vehicle (PHV) / Plug-in Hybrid Electric Vehicle (BEV) / Battery Electric Vehicle (BEV) is powered by a lithium-ion battery and is a battery management system that efficiently and safely manages lithium- (Battery Management System).

The battery management system includes a battery management unit for managing the entire battery pack, a cell monitoring unit for measuring the cell voltage and temperature in a module including a plurality of cells and a temperature sensor, . The battery pack consists of several (N) battery modules, and there are N cell monitoring units because the N modules contain each cell monitoring unit.

N cell monitoring units transmit cell voltage and temperature information to the battery management unit through various communication methods. One of the most used communication methods is CAN communication.

In the case of using the CAN communication method, since the N cell monitoring units performing the same operation are connected in parallel, it is necessary to assign an ID to distinguish each cell monitoring unit.

In order to assign an ID to each cell monitoring unit, a device for distinguishing each cell monitoring unit is required. If a device for distinguishing each cell monitoring unit is added, the specification of the cell monitoring unit is divided into N, It is difficult to manage and store it, and the cost of production and maintenance costs increases, thereby deteriorating the price competitiveness of the product. In addition, N cell monitoring units, which are similar to each other, must be separated and assembled, so that the possibility of quality problems such as erroneous assembly increases.

Korean Patent Publication No. 10-2016-0041260 (published on April 18, 2016)

Embodiments of the present invention are intended to provide a battery management system and a communication ID assignment method.

The battery management system according to an embodiment of the present invention includes a battery management module for providing a communication ID setting signal and a plurality of cell monitoring modules for providing a response signal to the battery management module to the communication ID setting signal, The battery management module allocates a communication ID for each of the plurality of cell monitoring modules based on the response signal

Wherein the battery management module provides a voltage as the communication ID setting signal, each of the plurality of cell monitoring modules includes a resistor, measures a voltage applied to the front end or the rear end of the resistor by the voltage, Value to the battery management module as the response signal.

The resistors included in each of the plurality of cell monitoring modules may be serially connected, and the battery management module may supply a voltage to the serially connected resistors.

The resistors included in each of the battery management module and the plurality of cell monitoring modules may be connected in a daisy chain manner.

The battery management module may allocate a communication ID for each of the plurality of cell monitoring modules based on a relative size of a voltage value received from each of the plurality of cell monitoring modules.

The resistance values of the resistors included in each of the plurality of cell monitoring modules may be the same.

The battery management module and the plurality of cell monitoring modules communicate by a CAN (Controller Area Network) communication method, and the communication ID may be an ID for the CAN communication.

A method for allocating communication IDs according to an embodiment of the present invention includes the steps of providing a communication ID setting signal to the plurality of cell monitoring modules by a battery management module, Signal to the battery management module, and the battery management module allocating a communication ID for each of the plurality of cell monitoring modules based on the response signal.

Wherein providing the communication ID setting signal includes providing a voltage as the communication ID setting signal and providing the voltage as the communication ID setting signal to the battery management module, wherein each of the plurality of cell monitoring modules comprises: Measure the voltage applied to the front end or the rear end of the resistance included in each of the resistors, and transmit the measured voltage value to the battery management module as the response signal.

The resistors included in each of the plurality of cell monitoring modules may be serially connected, and the battery management module may supply a voltage to the serially connected resistors.

The resistors included in each of the battery management module and the plurality of cell monitoring modules may be connected in a daisy chain manner.

The allocating step may allocate a communication ID for each of the plurality of cell monitoring modules based on a relative magnitude of a voltage value received from each of the plurality of cell monitoring modules.

The resistance values of the resistors included in each of the plurality of cell monitoring modules may be the same.

The battery management module and the plurality of cell monitoring modules communicate by a CAN (Controller Area Network) communication method, and the communication ID may be an ID for the CAN communication.

According to the embodiments of the present invention, it is possible to allocate the communication ID for each cell monitoring module based on the voltage value applied to the resistance included in each cell monitoring module, so that hardware and software can be allocated to the same cell monitoring modules A different communication ID can be allocated for each of them.

In addition, according to the embodiments of the present invention, since only the resistance is added to each cell monitoring module without adding complicated hardware or software in order to allocate different communication IDs to each cell monitoring module, Thereby increasing production efficiency and eliminating the possibility of quality problems such as misassembly.

1 is a schematic configuration diagram of a battery management system according to an embodiment of the present invention;
2 and 3 are schematic diagrams of a cell monitoring module according to an embodiment of the present invention
4 is a block diagram of a battery management module 110 according to an embodiment of the present invention.
5 is a flowchart of a communication ID assignment method performed by the battery management module 110 according to an embodiment of the present invention.
6 is a flowchart of a communication ID assignment method performed by a cell monitoring module according to an embodiment of the present invention

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to provide a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, this is merely an example and the present invention is not limited thereto.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification. The terms used in the detailed description are intended only to describe embodiments of the invention and should in no way be limiting. Unless specifically stated otherwise, the singular form of a term includes plural forms of meaning. In this description, the expressions " comprising " or " comprising " are intended to indicate certain features, numbers, steps, operations, elements, parts or combinations thereof, Should not be construed to preclude the presence or possibility of other features, numbers, steps, operations, elements, portions or combinations thereof.

1 is a schematic block diagram of a battery management system according to an embodiment of the present invention.

Referring to FIG. 1, a battery management system 100 according to an embodiment of the present invention includes a battery management module 110 and one or more cell monitoring modules 120-1, 120-2, and 120-3.

The battery management system 100 is for managing and controlling, for example, a battery pack including a plurality of battery modules, and may be implemented in a configuration included in the battery pack.

The battery management module 110 is for controlling each of the cell monitoring modules 120-1, 120-2, and 120-3. For this purpose, each of the cell monitoring modules 120-1, 120-2, and 120-3 , And can communicate with each of the cell monitoring modules 120-1, 120-2, and 120-3 using the assigned communication ID.

Specifically, according to an embodiment of the present invention, the battery management module 110 provides a communication ID setting signal to the plurality of cell monitoring modules 120-1, 120-2, and 120-3, It is possible to receive a response signal to the communication ID setting signal from the modules 120-1, 120-2, and 120-3. In addition, the battery management module 110 may control the cell monitoring modules 120-1, 120-2, 120-3, and 120-3 based on the response signals received from the respective cell monitoring modules 120-1, 120-2, ) Can be assigned to the respective communication IDs.

Meanwhile, the battery management module 110 and each of the cell monitoring modules 120-1, 120-2, and 120-3 can communicate through, for example, a CAN (Controller Area Network) communication method. However, the communication method between the battery management module 110 and each of the cell monitoring modules 120-1, 120-2, and 120-3 is not limited to the CAN communication method. In addition to the CAN communication method, Various communication methods capable of performing communication using IDs for identifying the modules 120-1, 120-2, and 120-3 can be used.

In the following description, it is assumed that the battery management module 110 and each of the cell monitoring modules 120-1, 120-2, and 120-3 communicate with each other via the CAN communication method for convenience of explanation. It should be noted that

Each of the cell monitoring modules 120-1, 120-2 and 120-3 is connected in parallel via a communication line connected to the CAN HIGH terminal and the CAN LOW terminal of the battery management module 110, and the battery management module 110 May assign a different communication ID to each cell monitoring module 120-1, 120-2, 120-3.

Each of the cell monitoring modules 120-1, 120-2, and 120-3 may monitor and control each of the plurality of battery modules included in the battery pack. Specifically, each cell monitoring module 120-1, 120-2, and 120-3 measures the state (e.g., voltage, temperature, etc.) of the battery cell included in the battery module, And can perform control (e.g., charge / discharge, switching, smoothing, on / off, etc.) of the battery cell according to a control signal received from the battery management module 110. [

Meanwhile, according to an embodiment of the present invention, the battery management module 110 may provide a voltage as a communication ID setting signal to the plurality of cell monitoring modules 120-1, 120-2, and 120-3. Each of the plurality of cell monitoring modules 120-1, 120-2 and 120-3 may include resistors 121-1, 121-2 and 121-3, The voltage value applied to the front end or the rear end of the resistors 121-1, 121-2 and 121-3 by the voltage can be supplied to the battery management module 110 as a response signal to the communication ID setting signal.

At this time, the resistors 121-1, 121-2, and 121-3 included in the cell monitoring modules 120-1, 120-2, and 120-3 are connected in series, and the resistors 121-1 121-2 and 121-3 are connected in series to the ID HIGH terminal and the ID LOW terminal, which are power source terminals of the battery management module 110.

Specifically, the resistors 121-1, 121-2, and 121-3 included in each cell monitoring module 120-1, 120-2, and 120-3 and the power source of the battery management module 110 are connected to a power source Can be connected by a chain (Daisy Chain) method. At this time, the battery management module 110 may apply a DC voltage of a predetermined magnitude to the ID HIGH terminal of the power source, and the ID LOW terminal may be grounded.

Accordingly, the battery management module 110 controls the front end or rear end of each of the resistors 121-1, 121-2, and 121-3 included in the cell monitoring modules 120-1, 120-2, A different voltage is applied.

On the other hand, the resistors included in each of the cell monitoring modules 120-1, 120-2, and 120-3 may have the same resistance value, but the present invention is not limited thereto. According to the embodiment, The values may be different.

Hereinafter, for convenience of description, the sizes of the resistors included in the cell monitoring modules 120-1, 120-2, and 120-3 are all described as being the same, but are not limited thereto.

Each of the cell monitoring modules 120-1, 120-2, and 120-3 measures the voltage at the front end or the rear end of the resistors 121-1, 121-2, and 121-3, Line to the battery management module 110 to request the communication ID allocation.

In this case, since the voltages measured at the front end or the rear end of each of the resistors 121-1, 121-2 and 121-3 are different from each other, the battery management module 110 controls the cell monitoring modules 120-1 and 120-2 120-2, and 120-3 based on the relative sizes of the voltage values received from the respective cell monitoring modules 120-1, 120-2, and 120-3, (120-1, 120-2, 120-3).

In the example shown in FIG. 1, the battery management system 100 includes three cell monitoring modules 120-1, 120-2, and 120-3. However, The number of the battery modules 120-1, 120-2, and 120-3 may vary depending on the number of battery modules included in the battery pack.

2 and 3 are block diagrams of a cell monitoring module according to an embodiment of the present invention.

2 and 3, the cell monitoring module 120 includes a resistor 121, a control unit 123, and a communication unit 125.

Assuming that the cell monitoring module 120 shown in FIG. 2 and FIG. 3 is the Mth cell monitoring module based on the ID HIGH terminal of the battery management module 110, (R _M-1 ) included in the cell monitoring module and a resistor (R _{M + 1} ) included in the ( _M-1 ) th cell monitoring module. If M = 1, the resistor 121 will be connected to the ID HIGH terminal of the battery management module 110 instead of the resistor R _M-1 included in the ( _M-1 ) th cell monitoring module unlike the illustrated example.

In addition, when M = N (where N is the number of cell monitoring modules), the resistor 121 may be replaced with a battery management module instead of the resistor R _{M + 1} included in the ( _{M + 1} ) Lt; RTI ID = 0.0 > ID < / RTI >

The control unit 123 measures the voltage applied to the front end of the resistor 121 as shown in FIG. 2, measures a voltage applied to the rear end of the resistor 121 as shown in FIG. 3, And transmits the voltage value to the battery management module 110 through the communication unit 125 to request the communication ID allocation.

)는 아래의 수학식 1과 같다.Specifically, the magnitude of the voltage applied to the front end of the resistor 121 (

) Is expressed by the following equation (1).

[Equation 1]

는 배터리 관리 모듈(110)의 전원 소스에 의해 제공되는 전압의 크기, R은 저항(121)의 크기를 의미하며, 이하, 동일한 의미로 해석된다.In Equation (1), N is the number of cell monitoring modules,

R denotes the magnitude of the voltage provided by the power source of the battery management module 110, and R denotes the size of the resistor 121, and is interpreted in the same sense as follows.

)는 아래의 수학식 2와 같다.As another example, the magnitude of the voltage applied to the rear end of the resistor 121

) Is expressed by the following equation (2).

 &Quot; (2) "

The control unit 123 may request the communication ID from the battery management module 110 through the communication unit 125 after requesting the communication management unit 110 to allocate the communication ID to the battery management module 110, And may communicate with the management module 110.

4 is a block diagram of a battery management module 110 according to an embodiment of the present invention.

Referring to FIG. 4, the battery management module 110 includes a voltage supply unit 111, an ID assigning unit 113, and a communication unit 115.

The voltage supply unit 111 may supply a voltage to the plurality of cell monitoring modules 120-1, 120-2, and 120-3. Specifically, the voltage supply unit 111 includes the cell monitoring modules 120-1, 120-2, and 120-3, and supplies the DC voltages to the serially connected resistors 121-1, 121-2, and 121-3. Can supply. That is, the voltage supply unit 111 operates as a power source for the resistors 121-1, 121-2 and 121-3 connected in series.

The ID assigning unit 113 is connected to the cell monitoring modules 120-1, 120-2 and 120-3 via the communication unit 115 at the front end or the rear end of the resistors 121-1, 121-2 and 121-3 Receive the measured voltage value, and assign a communication ID to each cell monitoring module 120-1, 120-2, 120-3 based on the relative magnitude of the received voltage values.

For example, when a voltage of 12 V is applied to the ID HIGH terminal of the voltage supply unit 111, a voltage of 0 V is applied to the ID LOW terminal, and each cell monitoring module 120-1, 120-2, Assuming that the voltage values measured at the front ends of the resistors 121-1, 121-2 and 121-3 are transmitted to the battery management module 110, the ID assigning unit 113 assigns the first cell monitoring module 120- 1 receives a voltage value of 12V from the second cell monitoring module 120-2 and receives a voltage value of 8V from the second cell monitoring module 120-2 and receives a voltage value of 4V from the third cell monitoring module 120-3 do.

In this case, the ID assigning unit 113 sequentially assigns the communication IDs according to the relative sizes of the received voltage values and transmits the communication IDs to the cell monitoring modules 120-1, 120-2, and 120-3 via the communication unit 125 Lt; / RTI > For example, the ID assigning unit 113 may assign ID "0001" for the 12V voltage value, ID "0010" for the 8V voltage, and ID "0011" for the 4V voltage.

As another example, a voltage of 12 V is applied to the ID HIGH terminal of the voltage supply unit 111, a voltage of 0 V is applied to the ID LOW terminal, and each cell monitoring module 120-1, 120-2, Assuming that the voltage value measured at the rear end of the first cell monitoring module 120-1 (121-1, 121-2, 121-3) is transmitted to the battery management module 110, Receives the voltage of 4V from the second cell monitoring module 120-2, and receives the voltage of 0V from the third cell monitoring module 120-3.

In this case, the ID assigning unit 113 assigns the ID "0001" to the 8V voltage value, the ID "0010" to the 4V voltage, and the ID "0011" to the 0V voltage .

5 is a flowchart of a communication ID assignment method performed by the battery management module 110 according to an embodiment of the present invention.

Referring to FIG. 5, the battery management module 110 provides a communication ID setting signal to a plurality of cell monitoring modules 120-1, 120-2, and 120-3 (510).

For example, the battery management module 110 may provide a DC voltage as a communication ID setting signal to the plurality of cell monitoring modules 120-1, 120-2, and 120-3.

Thereafter, the battery management module 110 receives a response signal for the communication ID setting signal from each of the cell monitoring modules 120-1, 120-2, and 120-3 (520).

For example, each of the cell monitoring modules 120-1, 120-2, and 120-3 may include a resistance, and a voltage value applied to the front end or the rear end of the resistance by the voltage provided from the battery management module 110 As a response signal to the communication ID setting signal.

Thereafter, the battery management module 110 allocates a communication ID to each cell monitoring module 120-1, 120-2, and 120-3 based on the received response signal (530).

Then, the battery management module 110 transmits a communication ID assigned to each cell monitoring module 120-1, 120-2, and 120-3 (540).

6 is a flowchart of a communication ID assignment method performed by a cell monitoring module according to an embodiment of the present invention.

6, each of the cell monitoring modules 120-1, 120-2, and 120-3 is connected to the resistors 121-1 and 121-2 by a voltage provided as a communication ID setting signal by the battery management module 110, , 121-3) is measured (610).

Each of the cell monitoring modules 120-1, 120-2, and 120-3 transmits the measured voltage value to the battery management module 110 as a response signal to the communication ID setting signal (620).

Each cell monitoring module 120-1, 120-2, and 120-3 receives a communication ID from the battery management module 110 (630).

On the other hand, an embodiment of the present invention may include a computer-readable recording medium including a program for performing the methods described herein on a computer. The computer-readable recording medium may include a program command, a local data file, a local data structure, or the like, alone or in combination. The media may be those specially designed and constructed for the present invention, or may be those that are commonly used in the field of computer software. Examples of computer readable media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floppy disks, and magnetic media such as ROMs, And hardware devices specifically configured to store and execute program instructions. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like.

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 limited to the disclosed exemplary embodiments, but, on the contrary, . Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

100: Battery management system
110: Battery management module
111: Voltage supply
113: ID assignment unit
115:
120, 120-1, 120-2, and 120-3: a cell monitoring module
121, 121-1, 121-2, 121-3: resistance
123:
125:

Claims (14)

A battery management module for providing a voltage as a communication ID setting signal; And
Measuring a voltage applied to a front end or a rear end of the resistor by a voltage provided as the communication ID setting signal and outputting the measured voltage value to the battery management module as a response signal to the communication ID setting signal, A plurality of cell monitoring modules,
Wherein the resistors included in each of the plurality of cell monitoring modules are serially connected,
Wherein the battery management module provides the voltage to the series connected resistors and allocates a communication ID for each of the plurality of cell monitoring modules based on the response signal.
delete delete The method according to claim 1,
The battery management module, and the resistors included in each of the plurality of cell monitoring modules are connected in a daisy chain manner.
The method according to claim 1,
Wherein the battery management module allocates a communication ID for each of the plurality of cell monitoring modules based on a relative size of a voltage value received from each of the plurality of cell monitoring modules.
The method according to claim 1,
Wherein the resistance values of the resistors included in each of the plurality of cell monitoring modules are the same.
The method according to claim 1,
Wherein the battery management module and the plurality of cell monitoring modules communicate using a CAN (Controller Area Network) communication method,
Wherein the communication ID is an ID for the CAN communication.
A method for allocating a communication ID of each cell monitoring module in a battery management system including a battery management module and a plurality of cell monitoring modules,
The battery management module providing voltage to the plurality of cell monitoring modules as a communication ID setting signal;
Each of the plurality of cell monitoring modules measures a voltage applied to a front end or a rear end of a resistance included in each of the plurality of cell monitoring modules by a voltage provided as the communication ID setting signal, Providing a response signal to the battery management module; And
And the battery management module allocating a communication ID for each of the plurality of cell monitoring modules based on the response signal,
Wherein the resistors included in each of the plurality of cell monitoring modules are serially connected,
Wherein the battery management module provides the voltage to the series connected resistors.
delete delete The method of claim 8,
The battery management module, and the resistors included in each of the plurality of cell monitoring modules are connected in a daisy chain manner.
The method of claim 8,
Wherein the assigning step assigns a communication ID for each of the plurality of cell monitoring modules based on a relative magnitude of a voltage value received from each of the plurality of cell monitoring modules.
The method of claim 8,
Wherein the resistance values of the resistors included in each of the plurality of cell monitoring modules are the same.
The method of claim 8,
Wherein the battery management module and the plurality of cell monitoring modules communicate using a CAN (Controller Area Network) communication method,
Wherein the communication ID is an ID for the CAN communication.

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