KR20230006145A - Control system for overcharge protection and overcharge protection method using the same - Google Patents

Abstract

Disclosed are an overcharge protection control system capable of preventing overcharging of a battery pack of a charge target apparatus, and an overcharge protection method using the same. The overcharge protection control system comprises: a charging device which charges the charge target apparatus; and a charging control server which requests and receives a battery charge value of the charge target apparatus being charged from a machine control server, and stops charging for the charge target apparatus when the battery charge value reaches a reference value.

Description

Overcharge protection control system and overcharge protection method using the same {CONTROL SYSTEM FOR OVERCHARGE PROTECTION AND OVERCHARGE PROTECTION METHOD USING THE SAME}

The present invention relates to an overcharge protection control system, and more particularly, to an overcharge protection control system capable of preventing overcharging of a battery pack of a device to be charged, and an overcharge protection method using the same.

Recently, interest in electric kickboards as a means of short-distance movement is increasing. In addition, electric kickboards are easy to operate and do not require a separate license, so many people can use them conveniently.

Due to this convenience, electric kickboards are widely used not only for personal possession for hobbies, but also for commuting. Accordingly, the sales business of personal electric kickboards, the rental business of electric kickboards, and electric kickboard-related markets are rapidly growing.

However, as the use of electric kickboards with convenience increases, safety problems also occur. The electric kickboard includes a motor that supplies power and a battery pack that supplies power to the motor.

Battery packs applied to electric kickboards have more battery cells connected in series or parallel than existing electronic devices such as mobile phones or laptops. The battery pack may be equipped with an overcharge protection circuit, and through this, overcharging of the battery pack is prevented.

However, there is a problem in that the battery pack is overcharged when the overcharge protection circuit of the battery pack malfunctions or operates with a delay. This may cause a fire or explosion accident during charging.

Accordingly, there is a need for a technology capable of safely protecting a battery pack from overcharging even when an overcharge protection circuit of a device to be charged is malfunctioning or delayed.

Document 1: Republic of Korea Patent No. 10-0907360 (2009.07.03) Document 2: Republic of Korea Patent Registration 10-1946288 (2019.01.31)

A technical problem to be solved by the present invention is to provide an overcharge protection control system capable of preventing overcharging of a battery pack of a device to be charged, and an overcharge protection method using the same.

In addition, the technical problem to be solved by the present invention is to provide an overcharge protection control system that can protect the battery pack from overcharge in conjunction with a device control server that monitors the state of the battery pack of the device to be charged, and an overcharge protection method using the same there is.

In addition, the technical problem to be solved by the present invention is to provide an overcharge protection control system and an overcharge protection method using the same that can safely protect a battery pack from overcharge even when the overcharge protection circuit of the device to be charged is faulty or delayed. .

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

An overcharge protection control system according to an embodiment receives a battery charging value for a device to be charged from a device control server and controls a charging operation of a charging device using the battery charging value.

Specifically, the charging control server requests and receives the battery charge value of the device to be charged from the device control server, and stops charging of the charging device when the battery charge value reaches the reference value to prevent overcharging.

In the overcharge protection control system according to an embodiment, a charge control server interworks with a device control server to monitor whether a device to be charged is fully charged.

Specifically, the charge control server receives the battery charge value of the device to be charged while the charging device is being charged from the device control server, monitors the charging state of the device to be charged, and thereby protects the device to be charged from overcharging.

The overcharge protection control system according to an embodiment safely protects the device to be charged from overcharging even when the overcharge protection circuit of the device to be charged is malfunctioning or delayed.

Specifically, the charging control server interlocks with the device control server to control the charging device using the battery charge value for the charging target device, so that even if the overcharge protection circuit of the charging target device fails or operates delayed, the charging target device is protected from overcharging. protect

An overcharge protection control system according to an embodiment requests and receives a charging device for charging a charging target device and a battery charge value of a charging target device being charged from a device control server, and charging when the battery charge value reaches a reference value and a charging control server that stops charging of the charging device to the target device.

An overcharge protection method according to an embodiment includes the step of charging a target device by a charging device, and requesting a battery charge value of a target device being charged by a charging control server to a device control server while the charging device is charging the target device. and receiving, and stopping charging of the charging device for the device to be charged when the charge control server reaches the reference value.

As described above, the overcharge protection control system according to an embodiment and the overcharge protection method using the same stop the charging of the charging device when the battery charge value received from the device control server reaches the reference value, thereby preventing overcharging of the device to be charged. can prevent

In addition, the overcharge protection control system and overcharge protection method using the same according to an embodiment monitors whether the battery pack of the device to be charged is fully charged in conjunction with a device control server that monitors the state of the battery pack of the device to be charged, thereby protecting the device to be charged from overcharging. can

In addition, an overcharge protection control system and an overcharge protection method using the same according to an embodiment monitor whether a device to be charged is fully charged in conjunction with a device control server and control a charging device, so that when the overcharge protection circuit fails or operates delayed Even charging target device can be protected.

In addition, an overcharge protection control system and an overcharge protection method using the same according to an embodiment stop the charging of the charging device when the battery charge value of the device to be charged that is received from the device control server reaches the reference value, which can occur during charging Fire or explosion accidents can be prevented.

In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 is a block diagram of an overcharge protection control system according to an embodiment.
2 is a flowchart illustrating an overcharge protection method using an overcharge protection control system according to an exemplary embodiment.

The above objects, means and effects will be described in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs will be able to easily implement the technical spirit of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, an overcharge protection control system capable of preventing overcharging of a battery pack of a device to be charged and an overcharge protection method using the same are disclosed.

1 is a block diagram of an overcharge protection control system 10 according to an embodiment.

Referring to FIG. 1 , the overcharge protection control system 10 according to an embodiment includes a device to be charged 100, a charging device 200, a charge control server 300, and a device control server 400.

[Charging target device]

The device to be charged 100 may be mounted on an electric device driven using electricity. As an example, the electric device may be an electric kickboard, which is a personal mobile device.

The device to be charged 100 includes a first charger 120, a first communicator 110, a battery management system (BMS), and a battery pack, and each component is mounted on an electric kickboard.

The first charger 120 receives a power signal from the charging device 200 and uses it to charge the battery pack. For example, the first charger 120 may be installed on a pole bar of an electric kickboard through a bracket. The first charger 120 can be used for various types of electric kickboards by replacing brackets according to models of electric kickboards.

The first charger 120 may include a receiving antenna, a rectifier, a boost converter, and a charging control circuit. The first charger 120 rectifies the power signal received from the charging device 200 into a DC voltage, converts the DC voltage into a constant voltage, and charges the battery cells of the battery pack using the constant voltage.

The first communicator 110 supports data transmission and reception between the charging target device 100 and the device control server 400 and supports data transmission and reception between the charging target device 100 and the charging device 200. . For example, the first communicator 110 may be installed in a steering device of an electric kickboard.

The battery management system (BMS) monitors the state of the battery cells of the battery pack installed in the electric kickboard and manages the battery cells so that they can be maintained and used in optimal conditions.

For example, the battery management system (BMS) can monitor the state of the battery cells to predict the replacement timing of the battery pack. In addition, the battery management system (BMS) may perform a cell balancing function to prevent battery life shortening due to a potential difference between battery cells as a plurality of battery cells are connected in series or parallel.

The battery management system (BMS) may transmit the battery state data (BMS_DA) to the device control server 400 through the first communicator 110 . For example, the battery management system (BMS) may transmit battery state data (BMS_DA) to the device management server 400 while the battery cells are being charged by the first charger 120 . The battery state data BMS_DA may include at least one of a battery charge value and a battery capacity value.

The battery charge value may be defined as a value representing the state of charge of the battery pack, and the battery capacity value may be defined as a value representing the total capacity of the battery pack.

The device to be charged 100 may have an ID (identification) set. The ID can be used to identify and manage the charging target device 100 of the electric kickboards.

The charging target device 100 may transmit an ID to the charging device 200 when it is parked at a charging station and charged, and when ID authentication is completed, it may receive a power signal from the charging device 200 and start charging.

[Charging device]

The charging device 200 transmits a power signal for charging to the charging target device 100 of the electric kickboard. For example, the charging device 200 may be installed in a charging station.

The charging station is a device for parking the electric kickboard and charging the parked electric kickboard. The charging station can be designed in a structure that facilitates parking, recognition, and charging of the electric kickboard. A description of the structure of the charging station is omitted in this specification.

The charging device 200 includes a second charger 220 , a second communicator 210 and an indicator 230 . Each component is installed in the charging station.

The second charger 220 charges the battery pack of the device to be charged 100 by transmitting a power signal having a wireless power transmission frequency to the first charger 120 of the device to be charged 100.

For example, the second charger 220 may include an AC/DC converter, a constant voltage unit, an oscillation unit, an amplification unit, a transmission antenna matching unit, and a transmission antenna. An AC/DC converter converts commercial power into direct current. The constant voltage section generates a constant voltage from the output of the AC/DC converter.

The oscillator uses the constant voltage as a power source and converts it into a wireless power transmission frequency signal. The amplifier amplifies the transmission frequency signal using the constant voltage as a power source. The transmit antenna transmits the transmit frequency signal to the first charger 120 of the device to be charged 100 as a wireless power signal.

The second communicator 210 supports transmission and reception of data between the charging device 200 and the charging target device 100 and supports transmission and reception of data between the charging device 200 and the charging control server 300.

The indicator 230 displays various information necessary for using or charging the electric kickboard.

The charging device 200 detects the charging target device 100 when the electric kickboard is parked at the charging station and receives an ID from the charging target device 100.

For example, the charging device 200 may detect the connection when the charging target device 100 is connected to a location where wireless charging is possible. As another example, the charging device 200 may detect connection of the device to be charged 100 by physically locking the electric kickwalk to the charging station.

The charging device 200 transmits the ID received from the charging target device 100 to the charging control server 300 . The charging device 200 transmits a power signal to the charging target device 100 when ID authentication is completed.

For example, the charging device 200 starts wireless charging of the battery pack of the charging target device 100 when the ID is authenticated by the charging control server 30 . As another example, the charging device 200 may embed data related to ID authentication and a program for performing authentication, and through this, the ID authentication process may be performed by itself.

When the charging target device 100 is unloaded from the charging station, the charging device 200 transmits an unloading message to the charging control server 300 . For example, the charging device 200 may transmit a vehicle exit message to the charging control server 300 when the charging target device 100 is detected as unconnected at a charging location.

[Charging Control Server]

The charging control server 300 may manage and control the charging device 200 in conjunction with the device control server 400 . For example, the charge control server 300 may receive battery state data (BMS_DA) of the device to be charged 100 from the device control server 400 and control the charging operation of the charging device 200 .

The charging control server 300 receives the ID of the charging target device 100 from the charging device 200 and performs an authentication procedure to check the validity of the ID. For example, the charging control server 300 may embed ID authentication related data and a program for performing authentication, and through this, an ID authentication procedure may be performed.

When authentication of the ID is completed, the charging control server 300 may command the charging device 200 to start charging. For example, the charging control server 300 may provide an authentication completion signal or a charging start signal to the charging device 200, and the charging device 200 may charge the charging target device 100 in response thereto.

The charging control server 300 requests the device control server 400 for battery state data (BMS_DA) of the device to be charged 100, and receives the battery state data (BMS_DA) from the device control server 400.

For example, the charging control server 300 transfers the battery status data (BMS_DA) to the device control server 400 using the ID of the charging target device 100 while the charging device 200 is charging the charging target device 100. can be requested at regular intervals. The battery state data BMS_DA may include a battery charge value and a battery capacity value.

The charging control server 300 controls the charging device 200 to stop charging the charging target device 100 of the corresponding ID when the battery charging value reaches the reference value.

For example, the charging control server 300 may periodically monitor whether the charging target device 100 is fully charged by comparing the battery charge value and the reference value, and when the battery charge value reaches full charge, the charging device 200 ) to stop the charging operation.

For example, the charge control server 300 may set a reference value according to the battery capacity value of the device to be charged 100 included in the battery state data BMS_DA. The capacity of the battery pack mounted on the electric kickboard may vary depending on the model or deteriorate and decrease with the passage of time.

The charge control server 300 may receive the battery state data BMS_DA from the device control server 400 and set a reference value to a value corresponding to the battery capacity value included in the battery state data BMS_DA.

Here, the reference value may vary according to the battery capacity value. For example, the charge control server 300 may set the reference value to a value corresponding to full charge of the battery capacity. As another example, the charge control server 300 may set the reference value to a value smaller than the full charge of the battery capacity by an allowable error range.

Since the battery pack of the device to be charged 100 is composed of lithium ion-based battery cells and may explode due to overcharging, a system for controlling this is absolutely necessary.

As described above, the charging control server 300 interworks with the device control server 400 to control the charging operation of the charging device 200 when the charging value of the charging target device 100 reaches the reference value corresponding to full charging. By controlling to stop, an explosion accident caused by overcharging is prevented in advance.

When receiving an unloading message from the charging device 200, the charging control server 300 ends the process of requesting the battery status data (BMS_DA) of the device to be charged 100 from the device control server 400.

In addition, the charge control server 300 may end a process of requesting battery state data (BMS_DA) for the device to be charged 100 when charging of the device to be charged 100 is completed.

For example, the charging control server 300 may receive a charging completion signal from the charging device 200 or receive battery state data (BMS_DA) from the device control server 400 to determine charging completion.

[Device control server]

The device control server 400 may be connected to the charge control server 300 through a communication network. For example, the device control server 400 and the charge control server 300 may be connected through at least one of a wired network, a wireless network, and a clouding network, and may interwork through this.

The device control server 400 receives battery state data (BMS_DA) from the device to be charged 100 . As an example, the device control server 400 may receive battery state data (BMS_DA) from the battery management system (BMS) of the device to be charged 100 .

Here, the battery management system (BMS) may detect the state of the battery cells while the battery cells are being charged, and may provide the battery state data (BMS_DA) to the device management server 400 .

When the battery status data (BMS_DA) of the charging target device 100 is requested from the charging control server 300, the device control server 400 transfers the battery status data (BMS_DA) of the charging target device 100 to the charging control server 300. provided to

For example, the device control server 400 may manage battery state data (BMS_DA) for each ID of the device to be charged 100 . When a request for battery state data (BMS_DA) is received from the charge control server 300, the device control server 400 may find the battery state data (BMS_DA) of a corresponding ID and provide the battery state data (BMS_DA) to the charge control server 300.

Hereinafter, the overcharge protection method of the overcharge protection control system 10 will be described. 2 is a flowchart illustrating an overcharge protection method using the overcharge protection control system 10 according to an embodiment.

Referring to FIGS. 1 and 2 , the charging device 200 first detects the connection of the charging target device 100 when the electric kickboard is parked at the charging station (S11).

The charging device 200 transmits the ID of the connected device to be charged 100 to the charging control server 300, and the charging control server 300 proceeds with a procedure for authenticating the ID of the device to be charged 100 (S12 ).

If the ID is valid, the charging control server 300 controls the charging device 200 to start wireless charging with respect to the charging target device 100 (S13).

The device to be charged 100 receives a power signal from the charging device 200 and charges the battery pack. Then, the device to be charged 100 transmits the battery state data (BMS_DA) generated by sensing the values of the battery cells of the battery pack to the device control server 400 at regular intervals while charging the battery pack (S14).

The device control server 400 receives battery state data (BMS_DA) from the device to be charged 100 at regular intervals, and updates the battery state data (BMS_DA) of the corresponding device to be charged 100 (S15).

The charging control server 300 requests the battery status data (BMS_DA) of the device to be charged 100 from the device control server 400 at regular intervals (S16). The device control server 400 provides battery state data (BMS_DA) to the charge control server 300 in response to the request (S17).

The charge control server 300 compares the battery charge value and the reference value to periodically monitor whether the device to be charged 100 is fully charged (S18). Then, the charge control server 300 instructs the charging device 200 to stop charging when the battery charge value reaches a reference value corresponding to full charge (S19).

The charging device 200 stops charging the charging target device 100 in response to the charging instruction (S20).

The charging device 200 detects the disconnection of the charging target device 100 when the electric kickboard is taken out of the charging station (S21). Then, the charging device 200 transmits the vehicle exit message to the charging control server 300 (S22).

The charging control server 300 terminates the process of requesting battery status data from the device control server 400 when receiving a car unloading message from the charging device 200 (S23).

In this way, the charge control server 300 stops charging of the charging device when the charge value of the battery received from the device control server 400 reaches the reference value, thereby preventing overcharging of the device to be charged 100.

In addition, since the charging control server 300 monitors the battery pack state of the charging target device 100 in conjunction with the device control server 400, the overcharge protection circuit installed in the charging device 200 or the charging target device 100 It is possible to protect the device to be charged 100 from overcharging even in the case of a malfunction or delayed operation.

In addition, since the charging control server 300 controls the charging operation of the charging device 200 in conjunction with the device control server 400, it is possible to prevent a fire or an explosion accident that may occur during charging.

Meanwhile, the embodiments illustrate an electric kickboard, but are not limited thereto. The embodiments may be applied to a system for preventing overcharging of an electric device equipped with a battery pack including a plurality of battery cells.

As an example, the embodiments may be interlocked with a control system for monitoring the battery state of electric vehicles and electric devices using a battery management system (BMS), and may be applied to a charging system for charging electric vehicles and personal electric devices. Embodiments can be applied to prevent fire or explosion accidents by additionally preventing overcharging through interworking with heterogeneous control systems.

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed in this specification, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operational effects according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be recognized.

10: Overcharge protection control system
100: charging target device 110: first communicator
120: first charger BMS: battery management system
BMS_DA: battery status data
200: charging device 210: second communicator
220: second charger 230: indicator
300: charging control server
400: device control server

Claims (18)

a charging device that charges the charging target device; and
A charge control server for requesting and receiving the battery charge value of the charging target device from a device control server, and stopping charging of the charging device for the charge target device when the battery charge value reaches a reference value overcharge protection control system. According to claim 1,
The charge control server requests battery state data from the device control server at regular intervals while the charging device charges the device to be charged. According to claim 2,
The charge control server compares the charge value of the battery included in the battery state data with the reference value and periodically monitors whether or not it is fully charged. According to claim 3,
The charge control server stops charging of the charging device when the battery charge value reaches full charge. According to claim 2,
The charge control server sets the reference value according to the battery capacity value of the device to be charged included in the battery state data. According to claim 5,
The reference value is set to a value corresponding to the full charge of the battery capacity. According to claim 1,
The overcharge protection control system of claim 1 , wherein the charging device transmits a vehicle exit message to the charging control server when the charging target device is detected as unconnected at a charging position. According to claim 7,
The charge control server terminates a process of requesting battery state data of the device to be charged from the device control server when the vehicle exit message is received. According to claim 1,
The charging device transmits an ID (ID, identification) of the charging target device to the charging control server when the charging target device is connected to a location where wireless charging is possible. According to claim 9,
The overcharging control system of claim 1 , wherein the charging control server authenticates validity of the ID when the ID is received from the charging device. According to claim 10,
The charging device starts wireless charging of the charging target device when the ID is authenticated by the charging control server. (a) charging the charging target device by the charging device;
(b) requesting and receiving, by a charging control server, a battery charge value of the charging target device from a device control server while the charging device is charging the device to be charged; and
(c) the charge control server stopping charging of the charging device for the device to be charged when the battery charge value reaches a reference value. Overcharge protection method using an overcharge protection control system. According to claim 12,
In step (a),
transmitting an ID of the charging target device to the charging control server when the charging device is connected to a location where wireless charging is possible;
authenticating, by the charging control server, validity of the ID when the ID is received from the charging device; and
and the charging device starting wireless charging of the charging target device when the ID is authenticated by the charging control server. According to claim 12,
The step (b) includes the step of the charge control server requesting and receiving battery state data from the device control server at regular intervals. 15. The method of claim 14,
In step (c),
periodically monitoring, by the charge control server, whether the battery is fully charged by comparing the charge value of the battery included in the battery state data with the reference value; and
The overcharge protection method using the overcharge protection control system comprising the step of the charge control server stopping charging of the charging device when the battery charge value reaches full charge. According to claim 15,
The step (c) further comprises setting the reference value according to the battery capacity value of the device to be charged included in the battery state data when the charge control server receives the battery state data Overcharge protection control Overcharge protection method using the system. According to claim 12,
When the charging device detects that the charging target device is unconnected at a charging position, the step (d) of transmitting a vehicle exit message to the charging control server. Overcharge protection method using an overcharge protection control system. 18. The method of claim 17,
In the step (d), the charge control server terminates a process of requesting battery state data from the device control server when the vehicle exit message is received.

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