KR20210158499A - Remote battery-monitoring system for electric vehicle - Google Patents

Abstract

In accordance with the present invention, since an SBMS board controlling several cells formed in a module and a PBMS board controlling several modules constituting each battery pack are formed to be bidirectionally communicable through a wireless communication module, there is no need to connect the SBMS board and the PBMS board through a cable, and, as a result, the boards can be easily assembled, and, moreover, a cell state can be easily checked and maintained even at a long distance through bidirectional communication. Moreover, since the PBMS board controlling each battery pack and a master battery management system (MBMS) board controlling general parts of the battery of the electric vehicle are formed to be bidirectionally communicable without cabling, the constitution of the battery of the electric vehicle can be simplified, and also, cell and battery states can be easily and accurately checked to be handled.

Description

Remote monitoring device for batteries for electric vehicles

The present invention relates to a remote monitoring device for a battery for an electric vehicle, and an SBMS (Slave Battery Management System) board that controls a plurality of cells in a module and a PBMS (Pack Battery Management) that configures a battery pack together with these modules and controls the module System) is configured to communicate wirelessly between boards, so the structure is simple and maintenance is easy. In addition, since the PBMS board mounted on multiple battery packs and the MBMS (Master Battery Management System) board that controls the entire battery are configured to communicate in a wireless manner, the battery status of the electric vehicle can be checked more easily and conveniently and made it possible to monitor.

In general, electric vehicles use electric power as driving power, so a battery system that can be easily charged as well as electric vehicles must be able to run for a long time is required. Accordingly, in the battery system for an electric vehicle, a technique for charging and controlling in various ways as shown in the following (Patent Document 1) to (Patent Document 3) is applied.

(Patent Document 1) Korean Patent No. 10-1583340

It relates to an electric vehicle and a charging control method for an auxiliary battery of an electric vehicle. Accordingly, the electric vehicle includes a high-voltage battery for driving the electric vehicle, an auxiliary battery for supplying driving power to a plurality of electric loads and a plurality of electric loads, and PWM switching to change the voltage of the high-voltage battery to the voltage required by the electric load. and a current detector for detecting an output current of the converter, wherein the converter reduces the output voltage of the converter when the energy required from the load is greater than the rated capacity of the converter based on the current detected by the current detector converter control unit. Accordingly, the converter and the auxiliary battery share the energy supplied to the load, so that the electric vehicle system can be operated stably.

(Patent Document 2) Korean Patent No. 10-2056476

A small secondary battery matrix control device for electric vehicles. a plurality of battery cells connected in series and in parallel to form a matrix structure; a cell processor connected to each of the plurality of battery cells and using a voltage applied to the battery cells to determine a location of a battery cell having an electrical state out of a threshold value among the plurality of battery cells; and a controller configured to control the current supplied to the battery cells by using the location information of the battery cells received from the cell processor.

(Patent Document 3) Korean Patent Laid-Open No. 10-2020-0061672

It relates to a battery integrated charging control device for an electric vehicle that enables system miniaturization and cost reduction, which includes primary to tertiary coils, and a secondary from a primary power source according to a turns ratio of the primary coil and the secondary coil. a transformer for inducing power and for inducing a quaternary power from a tertiary power source according to a turns ratio of the secondary coil and the tertiary coil; an On-Board Charger (OBC) primary circuit that converts an AC voltage input through an AC input connector into the primary power and applies it to the primary coil; In the rectification mode, the secondary power applied to the secondary coil is converted into DC voltage and outputted to the high voltage connector connected to the high voltage battery. In the converting mode, the battery voltage input through the high voltage connector is converted to the tertiary power. OBC/LDC integrated circuit for converting and applying to the secondary coil; an LDC secondary circuit for converting the quaternary power applied to the tertiary coil into a DC voltage and outputting it to a low-voltage connector to which a low-voltage battery is connected; an inverter converting the battery voltage input through the high voltage connector into a motor driving voltage and outputting it to an AC output connector to which the motor is connected; The OBC primary circuit, the OBC/LDC integrated circuit, the LDC secondary circuit, and the inverter are generally controlled, but the OBC/LDC integrated circuit operates in a rectification mode when the vehicle is parked, and converts when the vehicle is driving a processor operating in a mode; and the transformer, the OBC primary circuit, the OBC/LDC integrated circuit, the LDC secondary circuit, the inverter, the processor, the AC input connector, the AC output connector, the high voltage connector, the low voltage connector, the signal connector. may include a PCB circuit board for mounting and connecting circuits or between circuits and connectors to each other through signal lines.

Such a conventional battery system for an electric vehicle, as shown in Fig. 1, controls at least two battery packs 100 from an MBMS (Master Battery Management System) board to drive a motor and charge the battery pack 100 from the outside; Controls the charging of batteries supplied to electrical devices used indoors. At this time, each battery pack 100 includes a plurality of modules 10 and a PBMS board (Pack Battery Management System) that communicates with the MBMS board and controls these modules 10, and each module 10 includes the A plurality of cells are configured to be controllable through an SBMS (Slave Battery Management System) board that communicates with the PBMS board.

Here, since the configuration for connecting cells and communication between the pack and the MBMS board are made in a wired manner, the following problems occur.

(1) Since the SBMS board that controls multiple cells in each module and the PBMS board that controls these modules need to be wired for control, the connection between the SBMS board and the PBMS board is cumbersome and takes a long time to manufacture the battery. .

(2) In particular, since batteries for electric vehicles are usually installed on the floor panel or under the trunk in passenger vehicles and on the roof panel in buses, maintenance is difficult when a module, cell or pack breaks down.

(3) Also, if any one of the cells constituting approximately 20 in one module fails, it is difficult to find and repair the defective cell. In particular, each cell is assembled by connecting it in series, so if one cell is broken or out of control, the entire module must be discarded.

(4) In particular, there is no way to directly check the status or information about each module.

Korean Patent Registration No. 10-1583340 (Registration Date: December 31, 2015) Korean Patent Registration No. 10-2056476 (Registration Date: 2019.12.10) Korean Patent Laid-Open Patent No. 10-2020-0061672 (Registration Date: 2020.06.03)

The present invention takes this point into consideration, and provides an SBMS (Slave Battery Management System) board that controls multiple cells configured in a module and a PBMS (Pack Battery Management System) board that controls multiple modules constituting each battery pack. By configuring to communicate with each other through the wireless communication module, there is no need for a wired connection between the SBMS board and the PBMS board. An object of the present invention is to provide a remote monitoring device for an electric vehicle battery.

In addition, the present invention configures the PBMS board that controls each battery pack and the MBMS (Master Battery Management System) board that controls the overall battery for electric vehicles to be able to communicate wirelessly, thereby simplifying the battery configuration for electric vehicles and Another object of the present invention is to provide a remote monitoring device for a battery for an electric vehicle that can easily and accurately check and respond to a battery condition.

And the present invention configures such a wireless communication module to communicate with at least one of ZIGBEE and WIFI, so that it is possible to quickly and accurately know the module and battery pack status while simply configuring two-way communication. Another object of the present invention is to provide a remote monitoring device for an electric vehicle battery.

A remote monitoring device for a battery for an electric vehicle according to the present invention for achieving this object includes a plurality of cells and a plurality of modules 10 including a Slave Battery Management System (SBMS) board for controlling the cells by connecting them as one; And at least two battery packs 100 including a PBMS (Pack Battery Management System) board for controlling the module 10; and electrically connecting to the PBMS board to control charging and discharging of the module 10 In a remote monitoring apparatus for a battery for an electric vehicle comprising a MBMS (Master Battery Management System) board; a unique number is assigned to each module 10 to each module 10, and a wireless method using the unique number equipped with a short-distance wireless communication module 11 that can communicate with It is characterized in that it is equipped with a wireless communication module 110 for short-distance.

In particular, the MBMS board is provided with a wireless communication module 120 for short-distance, and is configured to communicate with at least a wireless communication module 110 mounted on the PBMS board among the wireless communication modules 11 and 110. characterized.

Lastly, the wireless communication modules 11, 110, and 120 are each configured to communicate with at least one of ZIGBEE and WIFI.

The remote monitoring apparatus for a battery for an electric vehicle according to the present invention has the following effects.

(1) A SBMS (Slave Battery Management System) board that controls multiple cells by configuring it in multiple modules constituting at least two battery packs constituting an electric vehicle battery and a PBMS (Pack) controlling multiple modules Battery Management System), since bi-directional communication is performed in a short-distance wireless communication method between boards, the battery configuration for an electric vehicle can be configured simply.

(2) Accordingly, not only can batteries for electric vehicles be easily manufactured and used, but also when cell or module failure or maintenance is required, it can be easily maintained through remote monitoring.

(3) In particular, since there is no need to directly connect the SBMS board and the PBMS board in a wired manner, the configuration is simplified and the wireless maintenance of these configurations is convenient.

(4) Meanwhile, in the battery pack, each PBMS board that controls multiple modules and the MBMS (Master Battery Management System) board that controls the overall battery for electric vehicles can also be configured to communicate in a wireless way, so that the driver or Even if the administrator does not remove the battery or open the cover, the battery status can be checked more easily and conveniently, and the status can be easily checked from a remote location.

1 is a block diagram schematically showing the internal configuration of a battery for an electric vehicle.
[Fig. 2] is a block diagram schematically showing the internal configuration of a battery for an electric vehicle according to Embodiment 1 of the present invention.
[FIG. 3] is a block diagram showing an example of using a battery pack consisting of two modules by omitting a part of a module in order to specifically show the internal configuration of the battery for an electric vehicle according to [Example 1] of the present invention.
4 is a block diagram showing a state in which the battery for an electric vehicle according to Embodiment 1 of the present invention is checked by a portable terminal.
[FIG. 5] is a block diagram schematically showing the internal configuration of a battery for an electric vehicle according to Embodiment 2 of the present invention.
[Fig. 6] is a block diagram showing an example of using a battery pack consisting of two modules by omitting a part of a module in order to specifically show the internal configuration of the battery for an electric vehicle according to [Example 2] of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor may properly define the concept of the term in order to best describe his invention. According to the principle that can be, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Therefore, since the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all the technical spirit of the present invention, various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and examples.

A remote monitoring apparatus for a battery for an electric vehicle according to [Embodiment 1] of the present invention, as shown in [Fig. 2] to [Fig. 4], a plurality of modules 10 and PBMS (Pack) for controlling these modules 10 At least two battery packs 100 including a Battery Management System (BMS) board, and a Master Battery Management System (MBMS) board for controlling these battery packs 100 .

In particular, the SBMS (Slave Battery Management System) board installed in the module 10 to control several cells mounted therein and the PBMS board are equipped with short-distance wireless communication modules 11 and 110 to enable bidirectional communication. By configuring it so that it is possible to simplify the connection between several modules 10 and the PBMS board, it can be manufactured simply, and can be easily maintained and maintained from a distance.

In addition, since the wireless communication modules 11 and 110 are configured to communicate with the mobile terminal T carried by the manager or driver, not only remote maintenance is possible, but also the driver can check the battery status at any time. This makes it possible to safely use the battery.

Hereinafter, such a configuration will be described in more detail with reference to the accompanying drawings.

go. battery pack

The battery pack 100 includes, as shown in FIG. 2 , a plurality of modules 10 performing a charge/discharge action and a PBMS (Pack Battery Management System) board for controlling these modules 10 .

1. module

The module 10, as shown in [Fig. 2] and [Fig. 3], substantially includes a plurality of cells for charging and discharging power, and an SBMS (Slave Battery Management System) board for controlling these cells.

At this time, since the SBMS board must control several modules 10 together, a unique number is assigned to each module 10, and the unique number is configured to enable bidirectional communication with the PBMS board to be described later in a wireless manner. , it is preferable to configure so that it is easy to know which module 10 needs abnormality or maintenance. At this time, the technical field to which the present invention pertains that such a unique number and the radio-type bidirectional communication method can also be assigned to each cell so that it can be configured to manage whether there is an abnormality and maintenance is required for each cell between each cell and the SBMS board. Anyone in the industry will be able to find out easily.

In particular, the module 10 is provided with a wireless communication module 11 for short-distance so that two-way communication can be performed in a wireless manner in a short distance as shown in FIGS. 2 and 3 . Although the drawing shows that the wireless communication module 11 is mounted on the SBMS board, it can be installed anywhere in the module 10 where it can communicate with a PBMS board to be described later through the SBMS board. This wireless communication module 11 is configured to be able to communicate wirelessly with a PBMS board to be described later.

Here, as the wireless communication module 11, any module capable of bidirectional communication with a PBMS board to be described later located in a short distance can be used. An example is WIFI. At this time, it is preferable to configure at least one of these communication modules to enable bidirectional communication with a PBMS board to be described later in various communication methods.

In addition, the wireless communication module 11, as shown in [Fig. 4], can also be configured to be able to communicate in both directions with the mobile terminal (T) in a wireless manner. This is to enable the mobile terminal T to check and maintain the state of each module 10 or the cell state configured in the module 10 through the mobile terminal T even from a distance.

On the other hand, the cell functions as a battery in which power is substantially charged and discharged. In the technical field to which the present invention pertains, a cell manufactured by a conventional technique used when manufacturing the module 10 is used as it is. The number of such cells varies depending on the battery capacity of the electric vehicle, and in the present invention, 22 cells are described as being configured in one module 10 .

2. PBMS (Pack Battery Management System) board

The PBMS (Pack Battery Management System) board is a board for integrating and managing the above-described multiple modules 10 as shown in FIGS. 2 and 3 . At this time, the PBMS board stably controls each module 10 so that the battery pack can be charged and discharged under the control of the MBMS board, which will be described later.

In a preferred embodiment of the present invention, the PBMS board, as shown in [Fig. 2] to [Fig. 3], it is preferable to have a wireless communication module 110 for short-distance and to be configured to enable bidirectional communication with the above-described SBMS board. . This is because it is not necessary to connect a wire between the above-described SBMS board and the PBMS board, so it is possible to simplify the configuration of the battery for an electric vehicle. This is because the battery status can be checked and maintenance can be performed from a long distance from anywhere where wireless two-way communication is possible.

This short-distance wireless communication module 110 uses the same short-distance wireless communication module 11 used in the above-described module 10, and can be configured to be usable even at a long distance through the portable terminal (T). , Since this configuration has already been described while describing the above-described module 10, a detailed description thereof will be omitted here.

me. MBMS (Master Battery Management System) Board

MBMS (Master Battery Management System) board, as shown in [Fig. 2] to [Fig. 4], through the above-described PBMS board to charge power to the module 10 or discharge the charged power so that the electric vehicle can run to drive the motor. In the drawings, “external charging” refers to charging made externally, such as rapid charging for direct charging of direct current or slow charging for charging by converting alternating current to direct current, and “motor driving” refers to a motor that is a power generating device that drives an electric vehicle The discharge state is indicated by the control to substantially rotate the

On the other hand, the MBMS board is configured to communicate with the above-described PBMS board, as shown in FIGS. 2 to 4 , and controls to actually charge/discharge the power stored in the module 10 . In this case, the MBMS board and the PBMS board communicate in both directions using a CAN (Controller Area Network) communication method. Here, CAN communication refers to a standard communication standard designed to allow a microcomputer or a controller to communicate with each other without a host computer in an electric vehicle.

The present invention made in this way is configured to enable two-way communication in a wireless manner between several SBMS boards that control each module 10 that actually charge power and the PBMS boards that control these SBMS boards, so that It is possible to eliminate the configuration, so the structure is simple, but the battery status can be easily checked from a distance in a wireless way.

The remote monitoring device for a battery for an electric vehicle according to Embodiment 2 of the present invention has the same configuration as in [Embodiment 1] described above, as shown in Figs. 5 and 6, but also includes a wireless communication module in the MBMS board. By having 120, there is a difference in that bidirectional communication with at least a PBMS board among the PBMS board and the SBMS board is enabled in a wireless manner. Accordingly, a detailed description of the same configuration as in the above-described [Embodiment 1] will be omitted and will be described based on the wireless communication method.

[Embodiment 2], as in [Figs. 5] and [Fig. 6], two-way communication is made wirelessly through the wireless communication modules 110 and 120 between the PBMS board and the MBMS board, which were previously made in the CAN communication method. configured to be able to. Here, since the wireless communication module 120 mounted on the MBMS board has the same configuration as the other wireless communication modules 11 and 110 described in [Embodiment 1], a detailed description thereof will be omitted here.

Accordingly, through the MBMS board, the charge state of each battery pack 100, the charge/discharge state of each module 10 configured in the battery pack 100, and the connection state are managed throughout the battery used in the electric vehicle. In particular, it becomes possible to easily check the battery management and status even from a distance.

10: module
100: battery pack
SBMS: Slave Battery Management System
PBMS: Pack Battery Management System
MBMS: Master Battery Management System

Claims (3)

A plurality of modules 10 including a plurality of cells and an SBMS (Slave Battery Management System) board for controlling the cells as one, and a PBMS (Pack Battery Management System) board for controlling the module 10 At least two battery packs 100; and a MBMS (Master Battery Management System) board electrically connected to the PBMS board to control charging and discharging of the module 10; at,
Each module 10 is provided with a wireless communication module 11 for short-distance that can be assigned a unique number to each module 10, and can communicate in a wireless manner using this unique number,
Electric vehicle, characterized in that the PBMS board is equipped with a short-distance wireless communication module 110 that can communicate with the wireless communication module 11 so as to control each module 10 through the unique number. Remote monitoring of the battery.
In claim 1,
In the MBMS board,
Battery for electric vehicle, characterized in that it is equipped with a short-distance wireless communication module (120), and is configured to communicate with at least a wireless communication module (110) mounted on the PBMS board among the wireless communication modules (11, 110) of remote monitoring devices.
In claim 2,
The wireless communication module (11, 110, 120) is,
A remote monitoring device for an electric vehicle battery, characterized in that it is configured to communicate with at least one of Zigbee (ZIGBEE) and Wi-Fi (WIFI), respectively.

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