KR101572493B1 - Lithium Battery Remote Management System for an electric rail car - Google Patents

Abstract

The present invention relates to a management system of a lithium ion battery for a train.
A remote management system for a lithium ion battery for a train according to the present invention includes a battery pack, a slave BMS for controlling charging and discharging of the battery pack and measuring a state value, A position sensor for acquiring position information of the electric vehicle on which the battery pack is mounted; a status detector for detecting a status value of the battery pack stored in the storage unit, identification information of the electric vehicle, And a display unit for displaying information on whether the electric motor vehicle needs to be inspected and information on the battery pack determined to be in an abnormal state under the control of the controller. The monitoring server cumulatively stores the state values of the battery pack, and when the state value of the accumulated battery pack is out of a predetermined normal range, the monitoring server determines that the battery pack is in an abnormal state, And notifies the administrator terminal. The master BMS receives and registers the battery pack identifier information of the battery pack from the manager when the battery pack is mounted on the train, and confirms whether the currently installed battery pack is a pre-registered battery pack when the battery pack is driven.

Description

TECHNICAL FIELD [0001] The present invention relates to a remote management system for a lithium ion battery for a train,

The present invention relates to a management system for a lithium ion battery for a train, and more particularly, to a management system for a lithium ion battery for a railway vehicle, To a remote management system for a lithium ion battery for a train.

In addition, the present invention relates to a remote management system for a lithium ion battery for a train vehicle, which enables stable operation of all battery packs and activation of normal distribution transactions by controlling the battery pack to be normally driven only when the slave BMS and the master BMS are mutually approved.

Generally, a large-capacity battery is composed of a plurality of battery packs connected in series, and each battery pack has a large number of battery cells connected in series or in parallel. The cell voltage is dispersed as the use time of the battery pack and the large capacity battery connected with a large number of battery cells is elapsed. When the scattering of the cell voltage occurs, the amount of accumulation increases with time, and there is a high possibility that a safety accident such as short-circuit, breakage or explosion of some cells occurs.

Generally, a large capacity lithium ion battery used for industrial use differs in battery characteristics from a lead-acid battery, a nickel-cadmium battery, and a nickel metal hydride battery used in a conventional electric vehicle or a UPS. In case of replacing a large capacity battery with a lithium ion battery only in a conventional electric vehicle or a UPS, the state of the lithium ion battery according to the characteristics of the lithium ion battery is monitored, and the risk of a safety accident is detected in advance and reported to the manager. There is a need for techniques to take appropriate action. At this time, there is a need for a technology that can provide the location of the battery pack (electric vehicle) to be inspected together with the manager terminal.

In addition, a slave BMS for managing the charge / discharge control and the state of the battery pack and the battery pack is typically connected by a package. Typically, this battery pack and slave BMS package is configured to enable recycling when the circuit is connected and attached to the master BMS. Since the battery pack and the slave BMS package are expensive and the electric vehicle is stored in a relatively insecure outdoor space (for example, a vehicle base), the battery pack and the slave BMS package mounted on the train are stolen, An example can occur. Therefore, there is a demand for a technique for preventing the battery pack and the slave BMS package from being illegally recycled.

Also, each battery pack deteriorates depending on the years of use. When the new battery pack is connected between the deteriorated battery packs, deterioration of the existing battery packs is accelerated and the life of the new battery pack is also reduced. Accordingly, there is a need for a technique of charging / discharging battery packs after confirming that all of the battery packs used in the past are normally connected among the plurality of battery packs.

Korean Patent No. 0860712

Korea Patent No. 1004964

Accordingly, an object of the present invention is to provide a system for efficiently managing a large-capacity lithium ion battery by reporting information on a battery pack in which an abnormal state is detected by monitoring the serial-connected battery pack used in a train in real time, .

It is another object of the present invention to provide a system which allows an administrator to easily find the electric vehicle by reporting the location information of the battery pack and the electric vehicle detected to the abnormal state to the manager terminal.

It is still another object of the present invention to provide a system and method for controlling a slave BMS and a master BMS so that the slave BMS and the slave BMS are normally operated only in a normally registered motor vehicle, And to control the plurality of battery packs to be normally driven only when the battery pack is operated.

According to an aspect of the present invention, there is provided a remote management system for a lithium ion battery for a motor vehicle,

A slave BMS for controlling charging and discharging of the battery pack and measuring a state value,

A master BMS communicating with the slave BMS to collect status values of the battery pack and store the status values in a storage unit;

A position sensor for acquiring positional information of a train equipped with the battery pack,

A control unit for transmitting a state value of the battery pack stored in the storage unit, identification information of the electric vehicle, and location information to a monitoring server;

And a display unit for displaying information on the necessity of the inspection of the electric motor under the control of the controller and information on the battery pack determined to be in an abnormal state,

The monitoring server cumulatively stores the state values of the battery pack, and when the state value of the accumulated battery pack is out of a predetermined normal range, the monitoring server determines that the battery pack is in an abnormal state, And notifies the administrator terminal,

The master BMS receives and registers the battery pack identifier information of the battery pack from the manager when the battery pack is installed in the train, and confirms whether the currently installed battery pack is a pre-registered battery pack when the battery pack is driven .

According to the present invention, the state of the series-connected lithium ion battery used for a train can be confirmed by a remote location or a train by battery, and the past history of each individual lithium ion battery is also stored and transmitted as data stored in a database, It is possible to easily grasp the degree of deterioration due to use.

According to the present invention, an administrator can easily find a battery pack to be inspected and a train by providing information on the current position of the battery pack and the train, which need to be inspected by detecting an abnormal state, to the manager terminal.

In addition, according to the present invention, the master BMS and the plurality of slave BMSs mutually register the identification information of the other party, and the battery pack is normally charged / discharged and driven only when mutual authentication is performed, It is possible to prevent shortening of the life time of the lithium ion battery by the battery BMS, and to confirm the installation password set in the battery pack when registering the arbitrary battery pack in the master BMS, .

1 is a block diagram of a remote management system for a lithium ion battery for a train according to an embodiment of the present invention.
2 is a flowchart illustrating a registration procedure between a master BMS and a slave BMS according to the present invention.
FIG. 3 is a flowchart illustrating a procedure for checking between a master BMS and a slave BMS according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. Like reference numerals designate like elements throughout the specification. In addition, abbreviations displayed throughout this specification should be interpreted to the extent that they are known and used in the art unless otherwise indicated herein.

The present invention provides a remote management system that monitors the status of a series-connected lithium ion battery used in a train in real time and sends a dangerous situation to a remote operator or a driver of the train in advance.

1 is a block diagram of a remote management system for a lithium ion battery for a train according to an embodiment of the present invention.

The large-capacity lithium ion battery according to the present invention comprises a plurality of battery packs 111 and 121, and the slave BMSs 112 and 122 are packaged and connected to the battery packs 111 and 121. Each of the slave BMSs 112 and 122 is connected to the master BMS 131 and the master BMS 131 integrally controls the plurality of slave BMSs 112 and 122. The operation of the first slave BMS 112 will be described below. The second slave BMS 122 also operates similarly to the first slave BMS 112.

The first slave BMS 112 includes a charge / discharge control unit 112a for controlling the charging / discharging of the first battery pack 111, a state for measuring the state values of all the individual batteries constituting the first battery pack 111 And a sending unit 112c for transmitting the status values of the entire battery pack and the individual batteries measured by the status measuring unit 112b to the master BMS 131. [ The second slave BMS 122 also includes a charge / discharge control unit, a state measurement unit, and a dispatching unit, similar to the first slave BMS 112.

The charging and discharging control unit 112a of the first slave BMS 112 charges the first battery pack 111 with external power under the control of the master BMS 131 and supplies the charging voltage charged in the battery pack 111 to the load (Electric vehicle). Also, the charge / discharge controller 112a stores the battery pack identifier of the first battery pack 111, the installation password, and the unique identifier of the master BMS 131. This battery pack identifier is an eigenvalue that is given when the first battery pack 111 is produced, and is a value that can be confirmed by being recorded on the battery pack enclosure. The installation password is a value that can be changed by the administrator and can not be confirmed in the exterior of the battery pack and is necessary for registering the first battery pack 111 in the master BMS 131. [ The unique identifier of the master BMS 131 is a unique value for identifying the master BMS 131 or the corresponding train.

When installing a group of battery packs in a train, the master BMS and the slave BMS each perform registration procedures. The master BMS and the slave BMS perform the registration procedure as shown in FIG. 2 even when mounting a new battery pack or a used battery pack in the train. Thereafter, when the electric motor vehicle is driven, the master BMS and the slave BMS are checked to see if they are properly registered in the pre-registered state. The registration procedure and the checking procedure between the master BMS and the slave BMS will be described with reference to FIGS. 2 and 3 and will be described later in detail.

The state measuring unit 112b collects the state values of the entire battery pack and the individual batteries from the sensors installed in the battery pack. The state values include voltage, current, temperature, resistance, and the like. The state measuring unit 112b includes a measuring unit that measures voltage, current, temperature, and resistance of the individual battery from the first battery pack 111, and calculates a state of charge (SOC) and a state of health (SOC) And an arithmetic operation unit for calculating the arithmetic operation result. Although the voltage, current, temperature, resistance value, and the like are exemplified as the parameters for confirming the state values of the unit cell or the entire battery pack, the scope of the present invention is not limited thereto, and various variables And can be measured by the measuring unit, all of which falls within the scope of the present invention.

The sending unit 112c transmits the state value measured by the state measuring unit 112b to the master BMS 131 together with the battery pack identifier information of the first battery pack 111. [

The master BMS 131 stores the received state value in the storage unit 132 together with the time information corresponding to the battery pack identifier. The storage unit 132 stores a plurality of battery pack identifiers and installation passwords for each battery pack, and accumulates and accumulates state values corresponding to the battery pack identifiers by time.

The control unit 133 transmits a status value stored in the storage unit 132 for each battery pack to the external monitoring server 151 through the communication unit 135 and the communication network 140. [ At this time, the control unit 133 transmits the vehicle number of the corresponding train, the position information of the corresponding train detected by the position sensor 134, the battery pack identifier per the battery pack, and the status value thereof to the monitoring server 151. The monitoring server 151 may receive and accumulate the status value for each battery pack. The control unit 133 determines whether the battery pack is abnormal based on the state values stored for each battery pack, and stores the battery pack information in which the abnormality has occurred, the vehicle number of the corresponding electric vehicle, and the position of the corresponding electric vehicle detected by the position sensor 134 Information can be transmitted to the monitoring server 151.

Although the master BMS 131 and the control unit 133 are described as separate devices in the embodiment of the present invention, the master BMS 131 and the control unit 133 may be implemented as a single physical device.

The communication unit 135 includes a data receiving unit for receiving the data transmitted from the control unit 133 (the vehicle number of the train, the battery pack identifier and state value for each battery pack, the location information of the electric vehicle, A power receiving section for receiving 5V power, and a converting section for transmitting information using the mobile communication network. That is, the communication unit 135 wirelessly connects to the communication network 140 via a wireless LAN access point (AP) and transmits the above-described data to the monitoring server 151. [ If an abnormality of a certain battery pack is detected, the control unit 133 displays on the display unit 136 a state requiring inspection, and also displays the battery pack information in which an abnormality has occurred.

The monitoring server 151 determines whether the battery pack is abnormal based on accumulated data of status values of the battery pack input through the control unit 133. [ As a result of the determination by the monitoring server 151, if an abnormality is detected in an arbitrary battery pack mounted on an arbitrary train, the monitoring server 151 communicates with the control unit 133 of the corresponding train to transmit the battery pack information . Then, the control unit 133 of the corresponding train indicates that the state of the display unit 136 is required to be checked, and displays the battery pack information in which an error has occurred.

The monitoring server 151 receives the battery pack information in which the abnormality is generated through the controller 133. If the monitoring server 151 determines that an abnormality has occurred in any battery pack through its own judgment or through the control unit 133, the monitoring server 151 notifies the administrator terminal 152 via the push server 153 of the battery Pack error occurrence message is transmitted. The battery pack abnormality occurrence message may include a vehicle number of the electric vehicle on which the abnormality is generated, current position information of the electric vehicle, battery pack information in which an abnormality has occurred, and abnormality occurrence state information.

An example of a technique for determining whether or not the battery pack is abnormal will be described. If the battery pack status value accumulated in the storage unit 132 is out of the preset normal range, the control unit 133 determines that the battery pack is abnormal. Or the monitoring server 151 determines that the battery pack state value received from the controller 133 and accumulated and accumulated in the battery pack state is out of the preset normal range. In one embodiment of the present invention, the predetermined range for determining the abnormal state (abnormal state) may be set by the operator, or may be determined based on the average value of the existing state value change values. For example, when the temperature difference between the cells is within a range of 5 degrees or less, and the temperature difference between cells is out of the range of 5 degrees, the battery pack is determined to be in an abnormal state (abnormal state).

According to an embodiment of the present invention, the range indicating the abnormal state may be preset or stored, or may be manipulated or changed by the client terminal of the operator. For example, from the accumulated state value data, the operator can know that there is no big problem in all cells when the temperature difference between cells is within 7 degrees. In this case, the operator can change the predetermined temperature difference tolerance range by 7 degrees through the administrator terminal he has.

The monitoring server 151 includes a server computer for receiving status information for differentiating and battery packs through the communication network 140, software for TCP / IP protocol, database for accumulating and storing the received status information for differentiating and battery packs, Web) environment to provide the operator with the desired value or graph. In particular, the interface selects and processes desired data or graphical information according to a request signal from the manager terminal 152 of the operator, and transmits the selected data to the corresponding manager terminal 152. The administrator terminal may be a smart phone of an administrator or a personal computer (PC) logged in with an administrator ID and password.

According to an embodiment of the present invention, the monitoring server 151 accesses the monitoring server 151 by inputting an administrator ID and a password at a remote location and logging in to the monitoring server 151. When the monitoring server 151 accesses the entire monitoring area, Date, month, and month data or graphs of the status values of any battery pack installed in the train of the vehicle. The provision of such data is carried out on the web through a personal computer, a smart phone, and the like.

According to an exemplary embodiment of the present invention, the state values stored in the monitoring server 151 are updated in real time, and new state values are accumulated in the past state values. Accordingly, the monitoring server 151 accumulates and accumulates the accumulated state values in a note paper apparatus provided in a web server or the like. Accordingly, the operator can confirm in real time how far the current state is out of the predetermined range than the past state.

The remote management system for a lithium ion battery for a train according to an embodiment of the present invention monitors the battery status of a serial connected battery built in a train, and the monitoring server 151 configures a battery pack installed in the train The history information about the state values of each cell can be accumulated in real time and transmitted to the administrator terminal. Thus, the operator can check the status of each unit cell connected in series and the abnormal status message in real time.

Hereinafter, a procedure for registering a mounted battery pack in the master BMS through communication between the master BMS and the slave BMS, and a procedure for checking mounted battery packs will be described.

2 is a flowchart illustrating a registration procedure between a master BMS and a slave BMS according to the present invention.

First, the master BMS stores a unique identifier of its own (master BMS) (S21), and the slave BMS stores the battery pack identifier and the installation password of the battery pack constituting the package with the slave BMS (S22).

The master BMS 131 receives the instruction of the manager and registers the battery pack constituting the package with the slave BMS through the slave BMS. To this end, the master BMS transmits a battery pack identifier and a setup password of the registration target battery pack to the slave BMS and requests registration (S23). The master BMS 131 receives the battery pack identifier of the registration target battery pack from the manager, and transmits the installation password or the pre-stored installation password input from the manager to the slave BMS.

The slave BMS receiving the registration request receives the information (the battery pack identifier and the installation password of the registration target battery pack) received from the master BMS and the pre-stored information (the battery pack identifier and the installation password of the battery pack constituting itself and the package) (S24).

If the two pieces of information match (S25), the slave BMS transmits a registration permission message to the master BMS. Then, the master BMS registers the battery pack identifier and the installation password of the registration target battery pack (S26) Master BMS) to the slave BMS (S27). With the master BMS accepting the battery pack identifier and the installation password of the battery pack, the administrator can modify the installation password, and the modified installation password is stored in the slave BMS and the master BMS, respectively.

The slave BMS stores the unique identifier information of the master BMS received from the master BMS (S28).

On the other hand, if the two pieces of information do not coincide with each other (S25), the slave BMS blocks charging / discharging operations of the battery pack and transmits a registration rejection message to the master BMS (S29).

The master BMS reports the registration result such as registration permission in step S26 to step S28 and registration rejection in step S29 to the manager.

Thereafter, periodically or at a specific state (charging or discharging), the master BMS checks whether the pre-registered battery packs are well loaded and whether the slave BMSs are well fitted to the pre-registered train (master BMS) Perform the verification procedure.

FIG. 3 is a flowchart illustrating a procedure for checking between a master BMS and a slave BMS according to the present invention.

The master BMS stores the battery pack identifier information of all the battery packs installed in the master BMS (train) in addition to the unique identifier information of the master BMS (S31), and the slave BMS registers The unique identifier information of the master BMS is stored as well as the battery pack identifier of the battery pack constituting the package through the procedure (S32).

The master BMS requests confirmation information from the slave BMS (S33). Then, the slave BMS transmits the battery pack identifier information of the previously stored battery pack or the unique identifier information of the master BMS to the master BMS (S34).

The master BMS compares previously stored information (battery pack identifier information of the battery pack or unique identifier information of the master BMS) corresponding to information (battery pack identifier information of the battery pack or unique identifier information of the master BMS) received from each slave BMS (S35).

As a result of the comparison in step S35, if all the pre-registered battery packs are properly installed (S36), the normal operation of the slave BMSs is allowed and the charge / discharge control of the battery pack is normally performed (S37).

As a result of the comparison in step S35, if at least one of the pre-registered battery packs is not mounted (S36), the administrator is informed of the fact of installing the new battery pack and guided to perform the registration procedure (S38) Thereby preventing the charge / discharge control of the battery pack from being performed (S39). This prevents damage to other battery packs due to the erroneously mounted new battery pack.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

111: first battery pack 112: first slave BMS
121: second battery pack 122: second slave BMS
131: Master BMS 132:
133: control unit 134: position sensor
135: communication unit 140:
151: Monitoring server 152: Administrator terminal

Claims (4)

A battery pack mounted on a train,
A slave BMS for storing a battery pack identifier and a setup password of the battery pack, controlling charging and discharging of the battery pack, and measuring a status value,
A master BMS for storing a unique identifier and communicating with the slave BMS to collect status values of the battery pack and storing the status values in a storage unit;
A position sensor for acquiring positional information of a train equipped with the battery pack,
A control unit for transmitting a state value of the battery pack stored in the storage unit, identification information of the electric vehicle, and location information to a monitoring server;
And a display unit for displaying information on the necessity of the inspection of the electric motor under the control of the controller and information on the battery pack determined to be in an abnormal state,
The monitoring server cumulatively stores the state values of the battery pack, and when the state value of the accumulated battery pack is out of a predetermined normal range, the monitoring server determines that the battery pack is in an abnormal state, And notifies the administrator terminal,
Wherein the slave BMS permits registration when the battery pack identifier and the installation password of the battery pack are received from the master BMS, controls the battery pack to be normally driven,
The master BMS receives and registers the battery pack identifier information of the battery pack from the manager when the battery pack is mounted on the train, and registers the battery pack identifier information of the battery pack stored in the master BMS and the slave BMS Wherein the remote control unit confirms whether the currently installed battery pack is a pre-registered battery pack. delete 2. The method according to claim 1, wherein the master BMS uses the master BMS unique identifier information stored in the master BMS and the slave BMS to confirm whether the currently installed battery pack is a pre-registered battery pack. Remote management system of the battery.
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