KR20170077707A

KR20170077707A - System and method for handling fault of battery through wireless communications

Info

Publication number: KR20170077707A
Application number: KR1020150187904A
Authority: KR
Inventors: 이상훈; 조현기
Original assignee: 주식회사 엘지화학
Priority date: 2015-12-28
Filing date: 2015-12-28
Publication date: 2017-07-06
Also published as: KR102035675B1

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a faulty battery control system and method using wireless communication, and more particularly, to a system and method for monitoring a battery using wireless communication, detecting a fault and informing a user.

Description

TECHNICAL FIELD [0001] The present invention relates to a system and a method for processing a bad battery using wireless communication,

Generally, if the discharge rate obtained by continuously measuring and measuring the cell voltage for a long period of time after manufacturing the battery cell is larger than the normal self-discharge rate, it is determined to be a defective cell.

Meanwhile, due to various limitations such as cell production period and storage problem, conventionally, the defective cell was determined by measuring the voltage only for a short period before shipment.

If the defective cells that have not been determined by the above are normally shipped and the battery pack is mounted as an external electronic device and a defective battery is installed, the defective battery causes a serious problem to the mounted external electronic device.

Thus, it is required to develop a technology for detecting and treating a defective battery which is not found before the battery is shipped to ensure the stability of the battery pack.

KR 2009-0130458 A

The present invention provides a faulty battery processing system and method using wireless communication that can detect and treat a faulty battery in a battery pack in use to prevent a danger generated from a faulty battery.

In a battery processing system including a battery pack, an end device, and a server, the battery pack includes a BMS for measuring a voltage of the main battery cell, And a main battery including at least one battery cell, the apparatus comprising: a terminal for transmitting a voltage measured by the BMS to a server; a controller for calculating a self-discharge rate with the measured voltage, .

The terminal device includes an auxiliary battery for self-power supply and a controller for battery control when the main battery cell is determined to be defective.

Wherein the control unit supplies the output of the auxiliary battery to the external electronic device when the signal is received from the server to determine that the main battery cell is defective and blocks the main battery output supplied to the external electronic device, And a control signal for alerting the auxiliary battery drive.

A control signal for alerting the failure of the main battery cell and the operation of the auxiliary battery is transmitted to the server or to a separate alarm device mounted outside the battery pack.

The server further includes a memory storing a first set cell voltage value of the main battery cell and a voltage value of the main battery cell measured and transmitted by the BMS.

The self-discharge rate calculation is performed based on the initial set cell voltage of the main battery cell stored in the memory and the voltage of the main battery cell measured and transmitted by the BMS.

A method for processing a defective battery using wireless communication according to an exemplary embodiment of the present invention is a method for processing a defective battery cell in a battery pack using a wireless communication network and including at least one battery cell, A server transmission step of transmitting the measured voltage value to the server, and a battery cell failure determination step of determining whether the battery cell is defective in the server receiving the measured voltage value.

Wherein the step of determining whether the battery cell is defective includes a self-discharge rate calculation step of calculating a self-discharge rate with a voltage measured in the voltage measurement step,

And a defective reference value checking step of checking whether the calculated self discharge rate exceeds a predetermined defective reference value.

The self-discharge rate calculating step divides the self-discharge time by subtracting the measured voltage from the predetermined cell voltage.

And a battery cell failure notifying step of transmitting a battery cell failure determination result to the battery pack when the battery cell is determined to be defective in the main battery cell failure determination step.

Further comprising a battery pack emergency mode setting step of setting the battery pack to operate in the emergency mode when receiving a notification that the defective battery cell has been detected in the main battery cell fault notification step.

The battery pack emergency mode setting step may include a main battery output blocking step for blocking an output from a main battery cell determined to be defective to an external electronic device, an auxiliary battery output step for outputting an output of the auxiliary battery to an external electronic device, And a failure notifying step of informing a user of the failure of the main battery cell and the driving of the auxiliary battery.

A faulty battery processing system and method using wireless communication according to an embodiment of the present invention detects a faulty battery using a wireless communication network and drives a spare battery instead of the detected faulty battery to ensure the stability of the battery pack.

1 is a block diagram of a faulty battery processing system utilizing wireless communication according to an embodiment of the present invention;
BACKGROUND OF THE INVENTION Field of the Invention [0001]
3 is a flowchart of a defective battery cell detection step in a defective battery processing method using wireless communication according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a step of determining whether a battery cell is defective in a defective battery cell detecting step according to an embodiment of the present invention. FIG.
FIG. 5 is a flowchart of a battery pack emergency mode operation step in a method of processing a bad battery using wireless communication according to an embodiment of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. Only embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those skilled in the art.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of identifying one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

1. A bad battery processing system utilizing wireless communication according to an embodiment of the present invention

The present invention is to detect a defective battery and notify the user of its contents to ensure a stable battery quality.

1 is a block diagram of a faulty battery processing system utilizing wireless communication according to an embodiment of the present invention.

1, a faulty battery processing system utilizing wireless communication according to an embodiment of the present invention includes a main battery 110 including one or more battery cells and a BMS 120 for measuring a voltage of the main battery cell A terminal device 200 for transmitting a voltage measured by the battery pack 100 to a server and a server 200 for calculating a self-discharge rate with the received measured voltage and monitoring a failure of the main battery cell, (300).

The terminal device 200 includes an auxiliary battery 210 for supplying power to the main battery cell when the main battery cell is determined to be defective, a controller 220 for controlling the battery, and a transmission / (230).

The controller 220 recognizes that the main battery cell is determined to be defective from the server by the transceiver 230. The controller 220 recognizes the information as a battery pack emergency mode and drives the auxiliary battery 210, It is possible to prevent the danger such as over discharge that the defective battery cell can be generated by stopping the driving of the main battery including the defective battery cell.

In addition, the controller 220 generates and transmits a control signal for alerting the main battery cell failure and the operation of the auxiliary battery to a server or a separate alarm device installed outside the battery pack, and informs the user of the control signal.

For example, it is possible to configure an alarm device composed of a separate buzzer or LED warning lamp outside the battery pack, inform the user through the alarm device that the battery pack is operating in the emergency mode, And notify the server through the device.

In addition, the emergency mode notification may be notified to the user by applying a technique such as push notification to the smart device application of the battery user through the server.

The server 300 includes a memory 310 storing a bad reference value, a bad battery cell determination unit (not shown) that receives the voltage information of the main battery cell measured by the BMS 120 and calculates a self-discharge rate to determine a bad battery cell 320, and a transmission and reception unit 330 for transmitting and receiving information of the main battery through the faulty and terminating device.

More specifically, the memory 310 stores a bad reference value, a first set cell voltage of the main battery cell, and a voltage of the main battery cell measured and transmitted by the BMS 120. In this case, the defective reference value may be set to a defective reference value for determining that the battery cell is defective when the self-discharge rate exceeds 10%.

Also, the cell voltage initially set here means the voltage of the battery cell set at the time of battery cell production.

In the meantime, the self-discharge rate in the defective battery cell determination unit 320 means a rate at which the effective capacity is reduced due to the self-discharge of the battery even if the battery pack is not driven, And the voltage of the main battery cell measured and transmitted by the BMS 120. [

2. Process of bad battery processing using wireless communication according to embodiments of the present invention

The method for processing a defective battery using wireless communication according to the present invention can prevent damage to an external device equipped with the battery pack by monitoring a battery after shipment to detect a defective battery cell and setting the battery pack to an emergency mode.

2 is a flowchart of a method for processing a defective battery utilizing wireless communication according to an embodiment of the present invention.

Referring to FIG. 2, a method of processing a defective battery using wireless communication according to an embodiment of the present invention includes a defective battery cell detection step (S200) for detecting a defective battery cell, a defective battery cell detection step (S200) (S300) and a battery cell fault notification step (S300) in which the result of the battery cell fault determination is transmitted to the corresponding battery pack (100), the battery pack is returned to the emergency mode The battery pack emergency mode operation step 400 may be performed.

That is, according to the present invention, the defective battery cell detection step S200 measures the voltage of the battery cell and transmits the measured voltage value of the battery cell to the server, . Next, when a defective battery cell is detected, the server notifies the terminal device of the battery pack having the defective battery cell of the defective battery cell (S300). Therefore, the battery pack notified as having the defective battery cell is operated in the emergency mode (S400).

Hereinafter, each of the above steps will be described in more detail with reference to FIG. 3 through FIG.

More specifically, the defective battery cell detection step (S200) will be described in detail with reference to FIG.

3 is a flow chart of a defective battery cell detection step (S200) of a defective battery processing method utilizing wireless communication according to an embodiment of the present invention.

Referring to FIG. 3, the defective battery cell detection step S200 includes a voltage measurement step S210 for measuring a voltage of the main battery cell to detect a defective battery cell, a voltage value measurement step S210 for measuring a voltage value, And a step S230 of determining whether the battery cell is defective in the server receiving the measured voltage value (S220). Here, the measured voltage is transmitted to the server through a terminal having short-range wireless communication and a gateway having long-range wireless communication.

The step of determining whether the battery cell is defective (S230) will be described in more detail with reference to FIG.

In order to determine whether the battery cell is defective, the server calculates the self-discharge rate of the battery. The self-discharge rate of a battery means a rate at which the effective capacity is reduced by discharging the battery itself without operating the battery pack.

4 is a flowchart illustrating a step S230 of determining whether a battery cell is defective in a defective battery cell detecting step according to an embodiment of the present invention.

Referring to FIG. 4, step S230 of determining whether a battery cell is defective is calculated in a self-discharge rate calculation step S231 and a self-discharge rate calculation step S231 in which the self-discharge rate is calculated using the voltage transmitted in the server transmission step S220 And a defective reference value checking step (S232) for checking whether the self discharge rate exceeds a predetermined defective reference value set.

More specifically, in the self-discharge rate calculation step S231, a self-discharge rate is calculated in order to determine a battery failure.

The calculation of the self-discharge rate is performed based on the difference between the initially set cell voltage of the battery stored in the memory 310 and the measured voltage of the battery received from the terminal 200 in the server transmission step S220 Time is divided by the time. Here, the self-discharge time refers to a time obtained by counting the time from the production time of the battery cell to the present time.

That is, the self-discharge rate is calculated by the following formula (1) (S231).

(1) Self-discharge rate (%) = (initial set battery cell voltage - measured battery cell voltage) / (battery cell voltage measurement point at the time of initial battery cell voltage setting)

Next, the server 300 determines whether the self-discharge rate calculated in the self-discharge rate calculation step S231 exceeds a predetermined failure reference value and determines whether the battery is defective or not (S232).

The server stores and manages the result of determining whether the battery is defective by matching the battery ID or the battery unique number to the memory 310.

The server can also inform the battery determined to be defective as to whether or not the battery is defective and control the battery to operate in the emergency mode. The case of controlling the emergency mode operation will be described below with reference to FIG.

5 is a flowchart of a battery pack emergency mode operation step 400 of a method for processing a faulty battery using wireless communication according to an embodiment of the present invention.

Referring to FIG. 5, in the emergency mode operation step, the controller 220 disables the output of the main battery (S410). The reason for blocking the output of the main battery 110 is that if the battery pack is operated even if it is defective, it causes a serious problem to the external electronic device to which the battery pack 100 is attached.

On the other hand, even if the output of the main battery 110 is shut off, electric power may be required for operation of the transmitter / receiver 230 of the terminal 200, user notification, and the like. In this case, the auxiliary battery 210 is output to maintain the communication network between the terminal device 200 and the server 300, and performs a function such as a user alarm.

The control unit 220 notifies the user of the failure of the main battery 110 cell and the operation of the auxiliary battery 210 by using the output of the auxiliary battery 210 at step S430.

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. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention.

100: Battery pack
110: main battery
120: BMS
200: terminating device
210: auxiliary battery
220:
230: Transmitting /
300: server
310: memory
320: Bad battery cell determination unit
330: Transmitting /

Claims

A battery processing system comprising a battery pack, an end device and a server,
The battery pack (100)
A BMS for measuring a voltage of the main battery cell; And
And a main battery including one or more battery cells,
A terminal for transmitting a voltage measured by the BMS to a server;
A server for calculating a self-discharge rate with the measured voltage to monitor whether the main battery cell is defective;
And a battery control unit for controlling the battery.

The method according to claim 1,
Wherein the terminating device comprises:
An auxiliary battery for self-power supply when the main battery cell is determined to be defective; And
A control unit for battery control;
Wherein the battery management system comprises:

The method of claim 2,
Wherein,
When a signal indicating that the main battery cell is defective is received from the server, the output of the main battery supplied to the external electronic device is cut off and the output of the auxiliary battery is supplied to the external electronic device, And a control signal generating unit for generating a control signal for notifying a user of the failure.

The method of claim 3,
Wherein a control signal for alerting the failure of the main battery cell and the auxiliary battery is transmitted to the server or to a separate alarm device mounted on the outside of the battery pack, .

The method according to claim 1,
The server comprises:
A memory storing a first set cell voltage value of the main battery cell and a voltage value of a main battery cell measured and transmitted by the BMS;
Further comprising a wireless communication unit that wirelessly communicates with the battery.

The method according to claim 1,
Wherein the self-discharge rate calculation is performed based on a first set cell voltage of the main battery cell stored in the memory and a voltage of the main battery cell measured and transmitted by the BMS.

A method for processing a defective battery cell of a battery pack using a wireless communication network and including one or more battery cells,
A voltage measuring step of measuring a voltage of the main battery cell;
A server transmitting step of transmitting the voltage value measured in the voltage measuring step to a server; And
Determining whether a battery cell is defective in a server receiving the measured voltage value;
The method comprising the steps of:

The method of claim 7,
The voltage measuring step may include:
A voltage transmitting step of causing the measured voltage to reach the server through a terminal having short-range wireless communication and a gateway having long-range wireless communication;
The method further comprising the steps of:

The method of claim 7,
Wherein the step of determining whether the battery cell is defective includes:
A self-discharge rate calculation step of calculating a self-discharge rate with a voltage measured in the voltage measurement step;
A defective reference value checking step of checking whether the calculated self discharge rate exceeds a predetermined defective reference value;
The method comprising the steps of:

The method of claim 9,
The self-discharge rate calculation step includes:
And calculating a discharge time by subtracting the measured voltage from a predetermined cell voltage.

The method of claim 7,
A battery cell failure notification step of transmitting a battery cell failure determination result to the battery pack when the battery cell is determined to be defective in the main battery cell failure determination step;
The method further comprising the step of:

The method of claim 11,
A battery pack emergency mode setting step of setting the battery pack to operate in an emergency mode when receiving a notification that a defective battery cell has been detected in the main battery cell fault notification step;
The method further comprising the step of:

The method of claim 12,
Wherein the battery pack emergency mode setting step comprises:
A main battery output interruption step of interrupting an output from the main battery cell determined to be defective to an external electronic device;
An auxiliary battery output step for causing an output of the auxiliary battery to be output to an external electronic device; And
A failure notification step of informing the user of the failure of the main battery cell and the driving of the auxiliary battery;
The method comprising the steps of: