WO2021049800A1 - Procédé pour diagnostiquer un état anormal d'une batterie, dispositif électronique associé et support de stockage pour celui-ci - Google Patents

Procédé pour diagnostiquer un état anormal d'une batterie, dispositif électronique associé et support de stockage pour celui-ci Download PDF

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Publication number
WO2021049800A1
WO2021049800A1 PCT/KR2020/011653 KR2020011653W WO2021049800A1 WO 2021049800 A1 WO2021049800 A1 WO 2021049800A1 KR 2020011653 W KR2020011653 W KR 2020011653W WO 2021049800 A1 WO2021049800 A1 WO 2021049800A1
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WIPO (PCT)
Prior art keywords
battery
remaining capacity
voltage
electronic device
abnormal state
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PCT/KR2020/011653
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English (en)
Korean (ko)
Inventor
한성호
김구섭
김영주
이재연
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삼성전자 주식회사
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Publication of WO2021049800A1 publication Critical patent/WO2021049800A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644—Constructional arrangements
    • G01R31/3646—Constructional arrangements for indicating electrical conditions or variables, e.g. visual or audible indicators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644—Constructional arrangements
    • G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/389—Measuring internal impedance, internal conductance or related variables

Definitions

  • Various embodiments relate to a method for diagnosing an abnormal battery condition, an electronic device and a storage medium therefor.
  • batteries are used in various devices such as electric vehicles (EVs) and robots as well as electronic devices such as mobile devices in a mobile environment.
  • EVs electric vehicles
  • batteries used in energy storage systems as well as electric vehicles may be configured by connecting several battery cells to charge or discharge high-power and large-capacity power.
  • the technology for controlling the battery can be very important, and as one of the control technologies, the operation efficiency of the electronic device can be improved by controlling charging and discharging of the battery using the remaining capacity of the battery. .
  • the battery when the battery is controlled using the remaining capacity of the battery, it may be possible to diagnose a battery condition due to deterioration.
  • the battery cell when the battery cell is overcharged or overdischarged, not only the lifespan may be shortened, but also the internal temperature of the battery may increase or the electrode may be decomposed and damaged.
  • the electronic device includes a battery, at least one processor, and a memory, and when the memory is executed, the at least one processor checks the remaining capacity of the battery, and the checked battery When the remaining capacity of is less than or equal to the threshold remaining capacity, information related to the remaining capacity of the battery is output, and when the determined remaining capacity is not less than or equal to the critical remaining capacity, the battery is charged or discharged based on the voltage or resistance value of the battery. Instructions for outputting information related to an abnormal state of the battery may be stored.
  • a method for diagnosing an abnormal battery condition in an electronic device includes: checking the remaining capacity of the battery, and outputting information related to the remaining battery capacity when the determined remaining capacity of the battery is less than or equal to a threshold remaining capacity.
  • the operation and when the determined remaining capacity is not less than the threshold remaining capacity may include outputting information related to an abnormal state of the battery based on the voltage or resistance value of the battery when the battery is charged or discharged.
  • the instructions are set to cause the at least one processor to perform at least one operation when executed by at least one processor, and the at least one operation is , An operation of checking the remaining capacity of a battery, an operation of outputting information related to the remaining capacity of a battery when the determined remaining capacity of the battery is less than or equal to a threshold remaining capacity, and an operation of outputting information related to the remaining capacity of the battery, and when the determined remaining capacity is not less than the threshold remaining capacity, the battery During charging or discharging, outputting information related to an abnormal state of the battery based on the voltage or resistance value of the battery may be included.
  • a condition caused by deterioration of the battery life but also various abnormal conditions occurring inside the battery can be diagnosed in advance, so that the stability of the battery can be secured.
  • the progress of swelling may be prevented and damage to a battery leading to battery firing may be prevented in advance.
  • the battery life and battery abnormal conditions corresponding to various environments are monitored in real time, and various battery abnormal conditions are displayed using a battery health index. Not only can you check it, you can also recognize it in advance.
  • FIG. 1 is a block diagram of an electronic device in a network environment according to various embodiments of the present disclosure.
  • FIG. 2 is a block diagram illustrating an electronic device for diagnosing an abnormal battery condition according to various embodiments of the present disclosure.
  • FIG. 3 is a block diagram of an electronic device for providing information on a state of a battery according to various embodiments of the present disclosure.
  • FIG. 4 is a graph showing a change in voltage over time by remaining capacity of a battery according to various embodiments of the present disclosure.
  • FIG. 5 is a graph for comparing a resistance value during charging and a resistance value during discharging of a battery according to various embodiments of the present disclosure.
  • FIG. 6 is a flowchart illustrating an operation of an electronic device for diagnosing an abnormal battery condition according to various embodiments of the present disclosure.
  • FIG. 7A is a flowchart illustrating an operation for diagnosing an abnormal state of a first battery according to various embodiments of the present disclosure.
  • FIG. 7B is a flowchart illustrating an operation for diagnosing an abnormal state of a second battery according to various embodiments of the present disclosure.
  • 7C is a flowchart illustrating an operation for diagnosing an abnormal state of a third battery according to various embodiments of the present disclosure.
  • FIG. 8 is a diagram illustrating an example of a screen for providing information related to a battery abnormal state according to various embodiments of the present disclosure.
  • FIG. 9 is a diagram for describing a method for generating a battery limit characteristic function according to various embodiments of the present disclosure.
  • FIG. 10 is a graph comparing a reference curve implemented as a function using battery limit characteristics and a curve during charge and discharge according to various embodiments.
  • FIG. 11 is a diagram illustrating a battery health index for diagnosing an abnormal battery condition according to various embodiments of the present disclosure.
  • FIG. 12 is a graph showing resistance values during charging and discharging for each remaining capacity of a battery according to various embodiments of the present disclosure.
  • 13 is a diagram illustrating resistance values during charging and discharging according to remaining capacity of a battery and resistance values in the case of sudden discharge according to various embodiments of the present disclosure.
  • FIG. 14 is a graph illustrating a relationship between a voltage change amount of a battery and a remaining capacity of a battery according to various embodiments of the present disclosure.
  • FIG. 1 is a block diagram of an electronic device 101 in a network environment 100 according to various embodiments of the present disclosure.
  • the electronic device 101 communicates with the electronic device 102 through a first network 198 (for example, a short-range wireless communication network), or a second network 199 It is possible to communicate with the electronic device 104 or the server 108 through (eg, a long-distance wireless communication network).
  • the electronic device 101 may communicate with the electronic device 104 through the server 108.
  • the electronic device 101 includes a processor 120, a memory 130, an input device 150, an audio output device 155, a display device 160, an audio module 170, and a sensor module ( 176, interface 177, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196, or antenna module 197 ) Can be included.
  • a sensor module 176, interface 177, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196, or antenna module 197
  • at least one of these components may be omitted or one or more other components may be added to the electronic device 101.
  • some of these components may be implemented as a single integrated circuit.
  • the sensor module 176 eg, a fingerprint sensor, an iris sensor, or an illuminance sensor
  • the display device 160 eg, a display.
  • the processor 120 for example, executes software (eg, a program 140) to implement at least one other component (eg, a hardware or software component) of the electronic device 101 connected to the processor 120. It can be controlled and can perform various data processing or operations. According to an embodiment, as at least a part of data processing or operation, the processor 120 may transfer commands or data received from other components (eg, the sensor module 176 or the communication module 190) to the volatile memory 132 It is loaded into, processes commands or data stored in the volatile memory 132, and the result data may be stored in the nonvolatile memory 134.
  • software eg, a program 140
  • the processor 120 may transfer commands or data received from other components (eg, the sensor module 176 or the communication module 190) to the volatile memory 132 It is loaded into, processes commands or data stored in the volatile memory 132, and the result data may be stored in the nonvolatile memory 134.
  • the processor 120 includes a main processor 121 (eg, a central processing unit or an application processor), and an auxiliary processor 123 (eg, a graphic processing unit, an image signal processor) that can be operated independently or together. , A sensor hub processor, or a communication processor). Additionally or alternatively, the coprocessor 123 may be set to use lower power than the main processor 121 or to be specialized for a designated function. The secondary processor 123 may be implemented separately from the main processor 121 or as a part thereof.
  • a main processor 121 eg, a central processing unit or an application processor
  • an auxiliary processor 123 eg, a graphic processing unit, an image signal processor
  • the coprocessor 123 may be set to use lower power than the main processor 121 or to be specialized for a designated function.
  • the secondary processor 123 may be implemented separately from the main processor 121 or as a part thereof.
  • the co-processor 123 is, for example, in place of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or the main processor 121 is active (eg, executing an application). ) While in the state, together with the main processor 121, at least one of the components of the electronic device 101 (for example, the display device 160, the sensor module 176, or the communication module 190) It is possible to control at least some of the functions or states associated with it.
  • the coprocessor 123 eg, an image signal processor or a communication processor
  • may be implemented as a part of another functionally related component eg, the camera module 180 or the communication module 190). have.
  • the memory 130 may store various types of data used by at least one component of the electronic device 101 (eg, the processor 120 or the sensor module 176 ).
  • the data may include, for example, software (eg, the program 140) and input data or output data for commands related thereto.
  • the memory 130 may include a volatile memory 132 or a nonvolatile memory 134.
  • the program 140 may be stored as software in the memory 130, and may include, for example, an operating system 142, middleware 144, or an application 146.
  • the input device 150 may receive a command or data to be used for a component of the electronic device 101 (eg, the processor 120) from outside (eg, a user) of the electronic device 101.
  • the input device 150 may include, for example, a microphone, a mouse, a keyboard, or a digital pen (eg, a stylus pen).
  • the sound output device 155 may output an sound signal to the outside of the electronic device 101.
  • the sound output device 155 may include, for example, a speaker or a receiver.
  • the speaker can be used for general purposes such as multimedia playback or recording playback, and the receiver can be used to receive incoming calls.
  • the receiver may be implemented separately from or as a part of the speaker.
  • the display device 160 may visually provide information to the outside of the electronic device 101 (eg, a user).
  • the display device 160 may include, for example, a display, a hologram device, or a projector and a control circuit for controlling the device.
  • the display device 160 may include a touch circuitry set to sense a touch, or a sensor circuit (eg, a pressure sensor) set to measure the strength of a force generated by the touch. have.
  • the audio module 170 may convert sound into an electrical signal, or conversely, may convert an electrical signal into sound. According to an embodiment, the audio module 170 acquires sound through the input device 150, the sound output device 155, or an external electronic device (for example, an external electronic device directly or wirelessly connected to the electronic device 101). Sound may be output through the electronic device 102 (for example, a speaker or headphones).
  • the sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101, or an external environmental state (eg, a user state), and generates an electrical signal or data value corresponding to the detected state. can do.
  • the sensor module 176 is, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, It may include a temperature sensor, a humidity sensor, or an illuminance sensor.
  • the interface 177 may support one or more designated protocols that may be used for the electronic device 101 to directly or wirelessly connect with an external electronic device (eg, the electronic device 102).
  • the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.
  • HDMI high definition multimedia interface
  • USB universal serial bus
  • SD card interface Secure Digital Card interface
  • audio interface audio interface
  • connection terminal 178 may include a connector through which the electronic device 101 can be physically connected to an external electronic device (eg, the electronic device 102).
  • the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).
  • the haptic module 179 may convert an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that a user can perceive through tactile or motor sensations.
  • the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.
  • the camera module 180 may capture a still image and a video.
  • the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.
  • the power management module 188 may manage power supplied to the electronic device 101.
  • the power management module 188 may be implemented as at least a part of, for example, a power management integrated circuit (PMIC).
  • PMIC power management integrated circuit
  • the battery 189 may supply power to at least one component of the electronic device 101.
  • the battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.
  • the communication module 190 includes a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (eg, the electronic device 102, the electronic device 104, or the server 108). It is possible to support establishment and communication through the established communication channel.
  • the communication module 190 operates independently of the processor 120 (eg, an application processor) and may include one or more communication processors supporting direct (eg, wired) communication or wireless communication.
  • the communication module 190 is a wireless communication module 192 (eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (eg : A local area network (LAN) communication module, or a power line communication module) may be included.
  • a corresponding communication module is a first network 198 (for example, a short-range communication network such as Bluetooth, WiFi direct or IrDA (infrared data association)) or a second network 199 (for example, a cellular network, the Internet, or It can communicate with external electronic devices through a computer network (for example, a telecommunication network such as a LAN or WAN).
  • the wireless communication module 192 uses subscriber information stored in the subscriber identification module 196 (eg, International Mobile Subscriber Identifier (IMSI)) in a communication network such as the first network 198 or the second network 199.
  • IMSI International Mobile Subscriber Identifier
  • the electronic device 101 can be checked and authenticated.
  • the antenna module 197 may transmit a signal or power to the outside (eg, an external electronic device) or receive from the outside.
  • the antenna module may include one antenna including a conductor formed on a substrate (eg, a PCB) or a radiator formed of a conductive pattern.
  • the antenna module 197 may include a plurality of antennas. In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is, for example, provided by the communication module 190 from the plurality of antennas. Can be chosen.
  • the signal or power may be transmitted or received between the communication module 190 and an external electronic device through the at least one selected antenna.
  • other components eg, RFIC
  • other than the radiator may be additionally formed as part of the antenna module 197.
  • At least some of the components are connected to each other through a communication method (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI))) between peripheral devices and a signal ( E.g. commands or data) can be exchanged with each other.
  • a communication method e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)
  • GPIO general purpose input and output
  • SPI serial peripheral interface
  • MIPI mobile industry processor interface
  • the command or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199.
  • Each of the electronic devices 102 and 104 may be a device of the same or different type as the electronic device 101.
  • all or part of the operations executed by the electronic device 101 may be executed by one or more of the external electronic devices 102, 104, or 108.
  • the electronic device 101 needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device 101
  • One or more external electronic devices receiving the request may execute at least a part of the requested function or service, or an additional function or service related to the request, and transmit a result of the execution to the electronic device 101.
  • the electronic device 101 may process the result as it is or additionally and provide it as at least a part of a response to the request.
  • cloud computing distributed computing, or client-server computing technology may be used.
  • FIG. 2 is a block diagram 200 illustrating an electronic device for diagnosing an abnormal battery condition according to various embodiments of the present disclosure.
  • the electronic device 201 may include a charge/discharge circuit 210, a processor 220, a memory 230, a sensor module 276, a power management circuit 288, and a battery 289. have.
  • the electronic device 201 may include a battery 289 in which battery cells are formed as one pack.
  • the battery pack may be a product including a housing for storing battery cells.
  • the battery pack may be detachable or detachable from the electronic device according to the specifications of the electronic device, or may be stored in the electronic device integrally with the electronic device.
  • the battery 289 may be referred to as, for example, a battery cell, may be charged as a charging current is supplied, and may be discharged by providing the charged power to the electronic device 201.
  • the battery 289 may serve to supply power to the main body of the electronic device or to charge power through an external charger.
  • the battery 289 may output a voltage in the range of about 3.3V to 4.3V. Accordingly, when fully charged, the battery 289 may output a voltage of about 4.3 V, and when completely discharged, the battery 289 may output a voltage of about 3.3 V.
  • the battery 289 may include a battery protection circuit module (PCM).
  • the battery protection circuit may perform one or more of various functions (eg, a pre-blocking function) for preventing performance degradation or burnout of the battery 289.
  • the battery protection circuit may additionally or alternatively be a battery management system (BMS) capable of performing various functions including cell balancing, battery capacity measurement, charging/discharging frequency measurement, temperature measurement, or voltage measurement. It can be configured as at least part of.
  • BMS battery management system
  • At least a part of the usage state information or the charge state information of the battery 189 is a corresponding sensor (eg, a current sensor, a voltage sensor, a temperature sensor) or a power management module 188 among the sensor modules 276. ) Can be measured.
  • the corresponding sensor for example, a current sensor, a voltage sensor, and a temperature sensor
  • the corresponding sensor among the sensor modules 176 is included as part of the battery protection circuit, or as a separate device near the battery 289. Can be placed on
  • the charging/discharging circuit 210 may include a charging unit 211 performing a charging operation on the battery 289 and a discharge unit 212 performing a discharging operation on the battery 289.
  • the charging/discharging circuit 210 may be configured to selectively perform a charging operation and a discharging operation for the battery 289.
  • the charging unit 211 may convert power supplied through an external charger into a form required for the battery 289 and then supply it to the battery 289.
  • the discharging unit 212 may supply power supplied from the battery 289 to the main body of the electronic device 201, for example, components.
  • the charge/discharge circuit 210 supplies power to the battery 289 according to a control signal output from the power management circuit 288 or the processor 220, or a voltage or current supplied from the battery 289. It may include a switching element to be adjustable.
  • the sensor module 276 may be configured to measure voltage and current for the battery 289, and may be configured to additionally measure the temperature of the battery 289 according to its implementation.
  • the sensor module 276 includes a current sensor measuring a charging current supplied to the battery 289, a voltage sensor measuring a terminal voltage between the positive and negative electrodes of the battery 289, and the battery 289. It may include a temperature sensor that measures the temperature.
  • the sensor module 276 may repeatedly measure the current, voltage, and temperature of the battery 289 in real time or periodically, and a measurement period for one of them may be the same or different from a measurement period for the rest. .
  • the power management circuit 288 monitors the status of the battery 289 (eg, voltage, current, and temperature) in real time or periodically using the sensor module 276, for example, according to the status of the battery 289. Operations that can be executed by the charge/discharge circuit 210 may be individually controlled. According to an embodiment, the power management circuit 288 is based on at least a part of the information of measuring the state of the battery 289, the state of charge information related to charging of the battery 289 (e.g., life, overvoltage, low voltage, overcurrent, Overcharge, over discharge, overheat, short circuit, or swelling) can be determined.
  • the state of charge information related to charging of the battery 289 e.g., life, overvoltage, low voltage, overcurrent, Overcharge, over discharge, overheat, short circuit, or swelling
  • the power management circuit 288 may determine whether the battery 289 is normal or abnormal based at least in part on the determined state of charge information. When it is determined that the state of the battery 289 is abnormal, the power management module 288 may adjust the charging of the battery 289 (eg, decrease the charging current or voltage, or stop charging). According to an embodiment, at least some of the functions of the power management module 288 may be performed by an external control device (eg, the processor 220).
  • the processor 220 may control an operation for acquiring various state information, including measuring voltage, current, and temperature of the battery 289. According to an embodiment, the processor 220 estimates the remaining life (SOH) in the battery 289, calculates a state of charge (SOC), performs cell balancing, overcharge, overdischarge, swelling, and internal short. ), it is possible to execute software for at least one of the sudden discharge determination.
  • SOH remaining life
  • SOC state of charge
  • the processor 220 performs an operation for proactively diagnosing various battery abnormal conditions occurring inside the battery 289 as well as a condition due to deterioration of the life of the battery 289 according to a user's usage pattern. can do.
  • the plurality of battery abnormal states may include battery abnormal states such as sudden discharge, swelling, and internal short circuit.
  • the processor 220 may detect an internal short-circuit condition among abnormal conditions inside a plurality of batteries while monitoring a condition due to deterioration in life of the battery 289.
  • the internal short-circuit condition may be a phenomenon that occurs when a user drops an electronic device or a large impact is applied by an external physical force. A method of detecting such an internal short condition will be described later with reference to FIG. 7A.
  • the processor 220 may detect a swelling state of the battery 289 among abnormal states inside the battery while monitoring a state due to deterioration of the life of the battery 289.
  • a swelling state may be a phenomenon in which a can swells due to a rapid increase in pressure inside a battery cell.
  • Such a swelling state may occur mainly due to gas generation inside the cell, such as when gas is generated due to heat generation or ignition of a lithium ion battery cell electrode, or gas is generated due to decomposition of an electrolyte solution due to an overvoltage.
  • gas generation inside the cell such as when gas is generated due to heat generation or ignition of a lithium ion battery cell electrode, or gas is generated due to decomposition of an electrolyte solution due to an overvoltage.
  • such a swelling condition can cause the battery pack to explode, destroying the battery pack and the device to which the battery pack is attached. This can happen.
  • the processor 220 may detect and notify various battery states such as a swelling phenomenon due to overcharging in real time while monitoring a state due to deterioration of the life of the battery 289.
  • the processor 220 displays various battery abnormal states using a battery health index, so that the user can not only check the battery problem situation at a glance, but also recognize it in advance. . Accordingly, the progress of swelling can be prevented and damage to the battery leading to the battery ignition can be prevented in advance. This swelling detection method will be described later with reference to FIG. 7B.
  • the processor 220 may detect a state of sudden discharge of the battery 289 among abnormal states inside the battery while monitoring a state due to deterioration of the life of the battery 289.
  • the sudden discharge state is a state in which a rapidly high output value (or resistance value) occurs during charging or discharging, and may be a phenomenon occurring at the moment when charging and discharging intersect. A method of detecting such a sudden discharge will be described later with reference to FIG. 7C.
  • the processor 220 may monitor the remaining capacity of the battery 289 in real time, while considering various abnormal states of the battery based on the relationship between various measurement values of the battery and the remaining capacity. By performing diagnosis, it is possible to notify the battery abnormal state in advance. Accordingly, the user can take different actions according to the abnormal state of the battery, thereby more effectively securing the safety of the battery.
  • the memory 230 may store various data, commands, and software necessary for diagnosing an abnormal state of the battery 289.
  • the electronic device 201 includes a battery 289, at least one processor 220, and a memory 230, and the memory 230 is, when executed, the at least one processor. 220, checks the remaining capacity of the battery 289, outputs information related to the remaining capacity of the battery if the remaining capacity of the checked battery 289 is less than or equal to the threshold remaining capacity, and the checked remaining capacity is the When the battery 289 is not less than the threshold remaining capacity, instructions for outputting information related to an abnormal state of the battery 289 based on the voltage or resistance value of the battery 289 when the battery 289 is charged or discharged may be stored.
  • the instructions include, when the at least one processor 220 checks the voltage or resistance value of the battery when charging or discharging the battery 289, the determined voltage of the battery 289 Alternatively, it may be set to identify at least one battery abnormal state corresponding from among a plurality of battery abnormal states based on the resistance value.
  • the at least one processor 220 charges the battery 289 when the amount of change between the checked remaining capacity of the battery 289 and the previous remaining capacity is within a threshold value.
  • it may be set to identify an abnormal state of the battery 289 based on the voltage or resistance value of the battery 289 during discharge.
  • the determined remaining capacity of the battery 289 and the previous remaining capacity are When the amount of change is compared with the threshold value, and as a result of the comparison, when the amount of change between the identified remaining capacity of the battery 289 and the previous remaining capacity is within the threshold value, set to identify an abnormal state of the battery 289 Can be.
  • the at least one processor 220 determines, as a result of the comparison, the amount of change between the determined remaining capacity of the battery 289 and the previous remaining capacity is equal to or greater than the threshold value, the remaining battery capacity It may be set to output information related to.
  • the at least one processor 220 checks the voltage change amount of the battery 289 during charging or discharging of the battery 289, and swells based on the voltage change amount. It may be set to detect whether or not, and to output information related to an abnormal state of the battery 289 based on the result of the swelling detection.
  • the instructions include, when the at least one processor 220 checks the amount of change in resistance of the battery 289 when charging or discharging the battery 289, and based on the amount of resistance change, the It may be set to detect whether or not to be discharged, and to output information related to an abnormal state of the battery 289 based on a result of the sudden discharge detection.
  • the at least one processor 220 checks the amount of resistance change when the battery 289 is charged and the amount of resistance change when the battery 289 is discharged, and the at least one processor 220 checks the amount of resistance change when the battery 289 is discharged. It may be set to detect whether the battery is rapidly discharged based on at least one of a resistance change amount of and a resistance change amount at the time of discharging of the battery, and to output information related to an abnormal state of the battery based on a result of the sudden discharge detection.
  • the at least one processor 220 includes an amount of change in the open circuit voltage due to a function using battery limit characteristics, and the battery 289 when charging or discharging the battery 289. It may be set to compare the voltage change amount and output information related to an abnormal state of the battery 289 based on the comparison result.
  • the difference between the change amount of the open circuit voltage and the voltage change amount of the battery 289 when the battery 289 is charged or discharged by the at least one processor 220 is a threshold voltage change amount.
  • it may be set to output information related to an abnormal state of a battery based on a result of detecting an internal short circuit.
  • FIG. 3 is a block diagram 300 of an electronic device for providing battery-related information according to various embodiments of the present disclosure.
  • the battery-related information may include a state of health (SOH) of a battery or a state of charging (SOC) of a battery.
  • SOH state of health
  • SOC state of charging
  • the SOH of the battery may be a ratio of the current capacity of the battery to the capacity at the time of manufacturing the battery.
  • the SOH of a battery may also be referred to by terms such as capacity (or remaining capacity), life (or expected life, or remaining life) of the battery, and battery performance.
  • the SOC of the battery may include the state of charge of the battery.
  • the SOC of the battery may also be replaced with terms such as the current charge amount and degree of charge of the battery 310.
  • the electronic device may include a battery 310, a processor 320, and a memory 330.
  • the battery 310 may have the same or similar configuration as the battery 189 of FIG. 1 or the battery 289 of FIG. 2.
  • the memory 330 may have the same or similar configuration as at least a portion of the memory 130 of FIG. 1 or the memory 230 of FIG. 2.
  • the memory 330 may include a mapping parameter 331.
  • the mapping parameter 331 is a parameter (or parameter set, or coefficient) representing a correlation between the amount of change in the voltage (or output voltage) (or voltage level) of the battery and the SOH (or SOC) of the battery. , Or a function).
  • the mapping parameter 331 may be a parameter for expressing a relationship between the level of the voltage changed during the specified time and the SOH of the battery by an equation.
  • the voltage of the battery related to the mapping parameter 331 may be a closed circuit voltage (or a closed loop voltage) taking into account (or reflecting) the internal resistance (or charging current) of the battery.
  • the voltage of the battery associated with the mapping parameter 331 is an open circuit voltage (or an open loop voltage) that does not take into account the internal resistance of the battery (or is measured in a no-load state).
  • the'voltage of the battery' refers to a voltage including the closed circuit voltage of the battery and the open circuit voltage of the battery
  • the'output voltage of the battery' refers to the closed circuit voltage of the battery.
  • the processor 320 may control an overall operation for providing information on the state of the battery 310.
  • the processor 320 may have the same or similar configuration as at least a part of the processor 120 of FIG. 1 or the processor 220 of FIG. 2.
  • the processor 320 may have the same or similar configuration as at least a part of the power management module 288 of FIG. 2.
  • the processor 320 may be included in the power management module 288 of FIG. 2.
  • the processor 320 may have the same or similar configuration as at least part of the battery management system (BMS).
  • BMS battery management system
  • the processor 320 includes an external device connection detection unit 321, a charging current acquisition unit 323, a mapping parameter acquisition unit 325, a voltage variation acquisition unit 327, and an SOH acquisition unit 329 It may include.
  • the external device connection detection unit 321 may detect whether an external device (hereinafter referred to as an “external device”) for charging a battery is connected to the electronic device 101.
  • the charging current acquisition unit 323 may obtain information on current supplied to the battery 310 through an external device (hereinafter, referred to as “charging current”).
  • mapping parameter obtaining unit 325 may obtain the mapping parameter 331 from the memory 330.
  • the mapping parameter acquisition unit 325 includes a mapping parameter 331 stored in the memory 330 as a mapping parameter indicating a correlation between the amount of change in the output voltage of the battery and the SOH (or SOC) of the battery.
  • a mapping parameter corresponding to the acquired charging current may be obtained from among mapping parameters stored for each charging current (or charging/discharging rate (C-rate)). For example, when the full charge capacity of the battery 310 is 1000 mAh, if the charging current is 100 mA, the charge/discharge rate may be 0.1C, and if the charging current is 1000 mA, the charge/discharge rate may be measured as 1C.
  • the mapping parameter acquisition unit 325 comprises a parameter 331 stored in the memory 330 as a mapping parameter indicating a correlation between the change amount of the open circuit voltage of the battery and the SOH (or SOC) of the battery.
  • a mapping parameter indicating a correlation between the amount of change in the open circuit voltage of the battery and the SOH (or SOC) of the battery may be obtained from the memory 330.
  • the mapping parameter acquisition unit 325 is based at least in part on the temperature of the electronic device 101 obtained by the electronic device 101 through the sensor module 176 (for example, a temperature sensor), the mapping parameter (331) can be obtained.
  • the mapping parameter acquisition unit 325 may convert the obtained temperature of the electronic device 101 into a mapping parameter indicating a relationship between a change amount of the voltage of the battery and SOH (or SOC), a temperature parameter, and electrons used in the experiment. By reflecting (or substituting) a function representing the relationship between the temperatures of the device, the mapping parameter can be obtained.
  • the voltage change amount acquisition unit 327 may obtain a change amount of the output voltage (or output voltage level) of the battery while the battery 310 is being charged through an external device. In one embodiment, the voltage change amount acquisition unit 327 partially charges the battery 310 through an external device (eg, partially charged from a state that is not completely discharged or charged to a fully charged state, or partially from a fully discharged state). During charging to a state of charge), a change amount of the output voltage (or output voltage level) of the battery 310 may be obtained at specified time intervals.
  • the voltage change amount acquisition unit 327 is an output voltage (or output voltage level) of the battery 310 at specified time intervals while the battery 310 is charged from a fully discharged state to a fully charged state through an external device. You can also obtain the amount of change in.
  • the voltage change amount acquisition unit 327 is based on the obtained change amount of the output voltage of the battery 310, the obtained charging current, and the internal resistance of the battery 310 (or the obtained output voltage of the battery and By performing an operation using the obtained charging current and the internal resistance of the battery), the amount of change in the open circuit voltage of the battery 310 may be obtained (or calculated).
  • the SOH acquisition unit 329 is based at least in part on the obtained mapping parameter 331 and the amount of change in the output voltage of the obtained battery 310 (or the amount of change in the obtained open circuit voltage of the battery 310).
  • the SOH (or SOC) of the battery 310 may be obtained (or estimated).
  • the SOH acquisition unit 329 is, among functions of the amount of change in the output voltage of the battery according to the charging time indicated by the acquired mapping parameter 331, according to a specified time while charging the battery 310 A function corresponding to (or matching) the amount of change (or a function of the amount of change) of the obtained (or measured) output voltage of the battery 310 (or at every specified time) may be obtained.
  • the SOH acquisition unit 329 includes functions representing correlations between the amount of change in the output voltage of the battery indicated by the acquired mapping parameter 331 and the SOH (or SOC), and while charging the battery 310
  • the SOH (or SOC) of the battery 310 may be obtained based at least in part on the amount of change in the output voltage of the battery 310 according to the specified time.
  • the SOH acquisition unit 329 is based at least in part on the obtained mapping parameter 331 and the obtained change amount of the output voltage of the battery 310 (or the obtained change amount of the open circuit voltage of the battery),
  • the SOH (or SOC) of the battery 310 may be obtained using a statistical prediction model or a machine learning technique.
  • the statistical prediction model is a particle filter, a Bayesian theorem, a Kalman filter, an extended kalman filter, or an unscented kalman filter. And the like.
  • the statistical prediction model for obtaining the SOH (or SOC) of the battery 310 is not limited to the above-described example.
  • the machine learning technique may include an artificial neural network (ANN), gradient descent, or the like.
  • ANN artificial neural network
  • the machine learning technique for obtaining the SOH (or SOC) of the battery 310 is not limited to the above-described example.
  • the processor 320 when an external device is connected to the electronic device 101, the processor 320 corresponds to (or reaches) a charging cycle (cycle or cycle) for obtaining SOH (or SOC). It may further include a configuration for checking. In one embodiment, the processor 320 may periodically acquire the SOH (or SOC) of the battery 310. For example, the processor 320 may perform an operation for acquiring SOH (or SOC) every periodic number of times (eg, about 50 times) to charge the battery 310. In another example, the processor 320 may perform an operation for acquiring SOH (or SOC) at periodic time intervals for charging the battery 310 (eg, at intervals of one week).
  • the remaining capacity of the battery may be the SOH of the battery 310 obtained by the SOH acquisition unit 329, and as described above, a method of estimating the SOH by a function learned through various learning models. Although illustrated, it may not be limited thereto.
  • FIG. 4 is a graph 410 showing a change in voltage over time according to remaining capacity of a battery according to various embodiments of the present disclosure.
  • FIG. 4 shows a graph 410 (or a function) representing an output voltage (or output voltage level) (or a change in battery output voltage) of a battery according to a charging time for SOHs of a battery. . That is, in FIG. 4, the voltage change over time when the battery is charged is shown for each remaining capacity (or remaining life) of the battery.
  • the horizontal axis represents time or the state of charge (SOC), and the vertical axis represents the magnitude of the voltage.
  • the graph 410 may be calculated (or obtained) based on a battery life deterioration experiment performed under an accelerated condition (or environment). In an embodiment, the graph may be calculated based on a set of data obtained in a battery life degradation experiment performed under an accelerated condition.
  • the function (or curve) 411 is a function representing the output voltage of the battery according to the charging time when the SOH of the battery is about 1
  • the function 413 is the charging time when the SOH of the battery is about 0.9
  • It is a function representing the output voltage of the battery according to
  • the function 415 may be a function representing the output voltage of the battery according to the charging time when the SOH of the battery is about 0.8.
  • the function (or curve) 411 is a case where the SOH of the battery is about 1, for example, the remaining battery capacity is about 100%, and the function 413 is a case where the remaining battery capacity is about 90%.
  • Function 415 can be seen as an example of a case in which the remaining capacity of the battery is about 80%. As such, the remaining capacity of the battery is deteriorated in resistance and capacity depending on the use environment or the period of use, so that the usable capacity decreases or the resistance increases, so that the SOH of the battery, which shows the performance, may decrease compared to the initial period of battery production.
  • the battery life for the function 415 may be shorter than the battery life for the function (or curve) 411. Accordingly, in an embodiment, as indicated by the arrow 417, the time for the battery to reach the fully charged state may be shorter as the function 411 goes from the function 411 to the function 415.
  • the functions 411 to 415 representing the output voltage of the battery according to the charging time for each SOH of the battery of FIG. 4 are illustrated, and the technical idea of the present invention is not limited thereto.
  • the functions 411 to 415 are based on the charging time obtained while supplying the same current (or the same constant current) to batteries having different SOHs (or by supplying the same current). They may be functions representing the output voltage.
  • the output voltage of the battery ( V) is changed by A 1 (V)
  • the output voltage (V) of the battery is changed by B 1 (V) for the time from the reference time (t 0 ) to the time (t 1) for the function 413
  • the output voltage V of the battery may be changed by C 1 (V) during the time from the reference time t 0 to the time t 1.
  • the output voltage of the battery for a time from a reference time t 0 to a time t 2 V) is changed by A 2 (V)
  • the output voltage (V) of the battery is changed by B 2 (V) for the time from the reference time (t 0 ) to the time (t 2) for the function 413
  • the output voltage V of the battery may be changed by C 2 (V) during the time from the reference time t 0 to the time t 2.
  • the output voltage of the battery for a time from a reference time t 0 to a time t 3 V) is changed by A 3 (V)
  • the output voltage (V) of the battery is changed by B 3 (V) for the time from the reference time (t 0 ) to the time (t 3) for the function 413
  • the output voltage V of the battery may be changed by C 3 (V) during a time from the reference time t 0 to the time t 3.
  • FIG. 5 is a graph 500 for comparing a resistance value during charging and a resistance value during discharging of a battery according to various embodiments of the present disclosure.
  • FIG. 5 a case in which the resistance value at the time of charging 510 of the battery and the resistance value at the time of discharging 520 is compared.
  • the horizontal axis represents time, and the vertical axis represents the magnitude of voltage.
  • the current charging curve corresponds to the curve indicated by the dotted line below, and the curve indicated by the solid line may be a reference curve based on an open circuit voltage (OCV).
  • OCV open circuit voltage
  • the open circuit voltage may be a reference value for measuring the amount of resistance change during charging.
  • the current discharge curve corresponds to the curve indicated by the dotted line above, and the curve indicated by the solid line may be a reference curve based on the open circuit voltage.
  • a resistance value during charging may be expressed as'R i,c,now2 ', which may represent a difference between an open circuit voltage and a voltage during a current charging.
  • the resistance value during such charging may be obtained in real time or in a specified unit.
  • a resistance value during discharge may be expressed as'R i, d, now2 ', which may represent a difference between an open circuit voltage and a voltage during a current discharge.
  • the resistance value at the time of such discharge may be obtained in real time or in a designated unit.
  • the resistance value at the time of charging or discharging can be obtained only by the amount of change in the voltage.
  • the electronic device compares it with the resistance value for the remaining capacity of the battery. An operation of classifying whether this is the case may be performed. As described above, even if the remaining capacity of the battery corresponds to the remaining capacity due to normal deterioration of life, more accurate diagnosis of a battery abnormal state may be possible by using a resistance value during charging and discharging.
  • FIG. 6 is a flowchart 600 of an operation of an electronic device for diagnosing an abnormal battery condition according to various embodiments of the present disclosure.
  • the operation method may include operations 605 to 625.
  • Each step/operation of the operation method includes an electronic device (eg, the electronic device 101 or 201 of FIGS. 1 and 2 ), and at least one processor of the electronic device (eg, the processors 120 and 220 of FIGS. 1 and 2 ). )).
  • at least one of operations 605 to 625 may be omitted, an order of some operations may be changed, or another operation may be added.
  • the electronic device may check the remaining capacity (eg, SOH) of the battery (eg, the battery 289 of FIG. 2 ). For example, the electronic device may obtain the current remaining capacity of the battery through the method illustrated in FIG. 3 described above.
  • SOH remaining capacity of the battery
  • the electronic device may identify whether the determined remaining capacity is less than or equal to the threshold remaining capacity.
  • the electronic device may check whether the determined remaining capacity of the battery is less than or equal to the critical remaining capacity (or has reached the limit SOH or less).
  • the critical residual capacity of the battery may be the SOH of the battery corresponding to a state in which the battery is deteriorated and does not operate normally (or a state in which there is a high possibility that the battery does not operate normally).
  • the critical residual capacity of the battery may be set by a designer (or manufacturer) of an electronic device (or battery).
  • the electronic device may output information related to the remaining battery capacity. For example, the electronic device may provide a notification related to a battery life that recommends replacement due to a decrease in battery usage time. For example, the electronic device may output a notification indicating that the lifespan of the battery has reached the limit, using at least one of visual feedback, auditory feedback, and tactile feedback.
  • the electronic device may identify whether the amount of change between the checked remaining capacity and the previous remaining capacity is greater than or equal to the threshold value. For example, the electronic device may use the difference between the checked remaining capacity and the previous remaining capacity to determine whether a battery life has not reached its limit or if a battery abnormality occurs.
  • the electronic device may store the obtained remaining capacity of the battery in a memory (eg, the memory 230 of FIG. 2 ). Also, the electronic device may obtain the remaining capacity of the battery acquired immediately before obtaining the current remaining capacity of the battery from the memory.
  • the battery It is regarded that an abnormality has occurred in itself, and information related to the remaining capacity of the battery can be output in operation 625.
  • the threshold value may be a predetermined value, and a threshold value for determining a battery abnormal state may be variously specified in consideration of various situations such as characteristics of each battery and a use environment.
  • the output of information related to the remaining battery capacity notifies the user of the electronic device that the remaining capacity of the battery has changed by a specified threshold or more, or the user is a service center related to the electronic device or a manufacturer of the electronic device (or battery). It may include a notification to notify that the remaining capacity of the battery has changed by more than a specified threshold value.
  • the electronic device is a manufacturer (or manufacturer) of a service center (or a device of a service center) or an electronic device (or battery) related to the electronic device by using a communication module (for example, the communication module 190 in FIG. 1). Device) can send a notification related to the change in the remaining capacity of the battery.
  • a method of providing a notification related to a change in the remaining battery capacity is not limited to the above example.
  • the electronic device when the amount of change between the remaining capacity checked in operation 615 and the previous remaining capacity is not more than a threshold value, that is, when the change amount is within the threshold value, in operation 620, the electronic device is Information related to an abnormal state of the battery may be output based on the resistance value.
  • the voltage or resistance value of the battery may be used when the battery is charged or discharged.
  • the electronic device uses the resistance value (or voltage) during charging and discharging, based on the reference resistance (or threshold resistance value) corresponding to the current remaining battery capacity, whether the resistance value during charging increases or when discharged. You can check whether the resistance value of is increased. If there is a resistance value that increases above the threshold value compared to the reference resistance, it is considered that a battery abnormal condition has occurred, and it is possible to identify which of the battery abnormal conditions such as swelling phenomenon and internal short circuit corresponds to the battery abnormal condition. have.
  • the electronic device may provide a battery health index to indicate a complex battery abnormal state.
  • the battery health indicator may be one of methods for providing information related to an abnormal state of a battery. For reference, the operation of determining the abnormal state of the battery will be described in detail with reference to FIGS. 7A to 7C.
  • a method for diagnosing an abnormal battery condition in an electronic device includes: checking the remaining capacity of the battery, and outputting information related to the remaining battery capacity when the determined remaining capacity of the battery is less than or equal to a threshold remaining capacity.
  • the operation and when the determined remaining capacity is not less than the threshold remaining capacity may include outputting information related to an abnormal state of the battery based on the voltage or resistance value of the battery when the battery is charged or discharged.
  • the method includes an operation of checking a voltage or resistance value of the battery when charging or discharging the battery, and responding among a plurality of battery abnormal states based on the determined voltage or resistance value of the battery. It may further include an operation of identifying at least one abnormal state of the battery.
  • the operation of identifying the abnormal state of the at least one battery may include the voltage of the battery when charging or discharging the battery when the amount of change between the checked remaining capacity and the previous remaining capacity is within a threshold value.
  • it may include an operation of identifying the abnormal state of the at least one battery based on a resistance value.
  • the identification of the abnormal state of the at least one battery may include determining a change amount between the checked remaining capacity of the battery and the previous remaining capacity when the checked remaining capacity is not less than the threshold remaining capacity. An operation of comparing with a value and, as a result of the comparison, identifying an abnormal state of the at least one battery when a change amount between the determined remaining capacity of the battery and the previous remaining capacity is within the threshold value.
  • the outputting of information related to the abnormal state of the battery includes: checking a voltage change amount of the battery during charging or discharging of the battery, and detecting whether or not swelling based on the voltage change amount. And outputting information related to an abnormal state of the battery based on the result of the swelling detection.
  • the outputting of the information related to the abnormal state of the battery includes: checking a change in resistance of the battery when charging or discharging the battery, and detecting whether a battery is rapidly discharged based on the change in resistance. action; And outputting information related to an abnormal state of the battery based on the sudden discharge detection result.
  • the operation of detecting whether a battery is rapidly discharged based on the amount of resistance change may include checking an amount of change in resistance during charging of the battery and an amount of change in resistance during discharging of the battery, and the amount of change in resistance during charging. And detecting whether the battery is rapidly discharged based on at least one of a change in resistance when the battery is discharged.
  • the outputting of information related to the abnormal state of the battery includes comparing an open circuit voltage change amount by a function using a battery limit characteristic and a voltage change amount of the battery when charging or discharging the battery. And outputting information related to an abnormal state of the battery based on the comparison result.
  • the outputting of information related to the abnormal state of the battery may include detecting an internal short circuit when the difference between the open circuit voltage change amount and the voltage change amount of the battery when charging or discharging the battery is greater than or equal to the threshold voltage change amount. It may include an operation of outputting information related to an abnormal state of the battery based on the result.
  • FIG. 7A is a flowchart 700a of an operation for diagnosing an abnormal state of a first battery according to various embodiments of the present disclosure.
  • the electronic device may be in a state in which the remaining capacity of the battery, that is, SOH, is confirmed in operation 605 of FIG. 6, and the electronic device may be in a state in which it is determined that the amount of change between the determined remaining capacity and the previous remaining capacity is not more than a threshold value. Accordingly, the electronic device may determine a battery abnormal state even in a normal life deterioration state.
  • the electronic device may compare resistance values during charging or discharging of the battery using a battery limit characteristic function.
  • the resistance value during charging or discharging of the battery may correspond to a resistance change amount in a predetermined unit, and may be a value proportional to the voltage change amount.
  • the electronic device may compare an open circuit voltage change amount due to a function using a battery limit characteristic and a voltage change amount of the battery when the battery is charged or discharged.
  • the reference voltage (or limit voltage) for the identified SOH can be known, and the resistance value (or voltage) at the time of charging or discharging the battery is determined as the reference voltage for the identified SOH. Can be compared with
  • the battery limit characteristic may refer to a relationship between the limit voltage and the SOH of the battery.
  • the maximum voltage and maximum time that the battery can withstand without irreversible damage to the battery can be referred to as the limit voltage and the limit time, respectively.
  • the voltage of the battery which is a specific value of SOH, is limited beyond the limit voltage. If it lasts longer than an hour, irreversible damage to the battery may occur.
  • the limit voltage is changed according to the SOH of the battery, and may be predetermined for each SOH of the battery through a preliminary experiment. For example, if the SOH of the battery is 0% to 100%, a limit voltage (or reference voltage) may be determined for each SOH of a specified unit.
  • the limiting characteristics of the battery may be implemented in the form of a function in advance through a battery short circuit experiment.
  • the electronic device may determine a battery abnormal state based on the comparison result.
  • the difference between the open circuit voltage change amount and the battery voltage change amount during charging or discharging of the battery is greater than or equal to the threshold voltage change amount, it may be detected that the battery is in an abnormal state due to an internal short circuit, using the battery limit characteristic function.
  • the electronic device may convert a battery abnormal state equal to or higher than the threshold value into a battery health indicator.
  • the electronic device determines that the converted battery health indicator (e.g., when the health index is 3) is section a (or a predetermined If it falls within the first section) (eg, health indicators 1 to 5), it can be confirmed that an internal battery abnormality has occurred due to an internal short circuit, and the abnormal state of the battery corresponding to the internal short circuit can be notified to the user. For example, as illustrated in FIG. 8, by indicating a battery health index as A on the screen, it is possible to indicate that the battery is in an abnormal state due to an internal short circuit.
  • the converted battery health indicator e.g., when the health index is 3
  • the first section e.g., health indicators 1 to 5
  • the battery limit characteristic function may be used to compare with a resistance value during charging or discharging of the battery.
  • the battery limit characteristic function may be used to compare in real time with a charging curve or a discharge curve generated by resistance values during charging or discharging while an actual user uses an electronic device.
  • the electronic device may detect an abnormal state of the battery, including an abnormal phenomenon inside the battery and damage caused by an external physical force.
  • a battery abnormal state due to an internal short circuit may be detected using a battery characteristic function generated in various short circuit situations, such as when a user drops an electronic device or a large impact is applied by an external physical force.
  • the battery limit characteristic function is a function representing the relationship between the amount of change in the output voltage of the battery ( ⁇ V) and the SOH of the battery, and the amount of change in the open circuit voltage of the battery ( ⁇ V OCV ) and the SOH of the battery. A detailed description of will be described later with reference to FIGS. 9 and 10.
  • FIG. 7B is a flowchart 700b of an operation for diagnosing an abnormal state of a second battery according to various embodiments of the present disclosure.
  • the electronic device may detect whether the battery is swelling when charging or discharging.
  • data stored in the form of a function in advance through a swelling experiment can be used.
  • the electronic device may generate a swelling-related function using a voltage change amount when charging or discharging a battery.
  • the swelling-related function may be a function that continuously represents a correlation between the SOH of the battery and the amount of voltage change during charging or discharging.
  • the electronic device may determine a battery abnormal state based on whether swelling is detected. For example, the electronic device calculates the amount of voltage change during charging or discharging of the battery based on the swelling-related function, and compares the curve of the swelling-related function with the curve at the time of charging and discharging to detect whether or not swelling.
  • the swelling-related function is a function ⁇ V k implemented by various swelling occurrence phenomena, and may be a function created in the form as in FIG. 9 by matrixing the graph of FIG. 14. A detailed description of this will be described later. Accordingly, the electronic device may determine whether swelling has occurred by comparing it with the database-generated function.
  • the electronic device may detect that swelling has occurred. Also, the electronic device may convert a battery abnormal state corresponding to a swelling phenomenon into a battery health indicator. If the battery health indicator falls within a section corresponding to swelling among a plurality of battery health indicator sections (e.g., a predetermined second section), it can be confirmed that an internal abnormality has occurred due to swelling, and the battery health indicator is used. Thus, it is possible to notify the user of the occurrence of swelling.
  • 7C is a flowchart 700c of an operation for diagnosing an abnormal state of a third battery according to various embodiments of the present disclosure.
  • the electronic device may compare a change in resistance of the battery with a specified change amount when the battery is charged or discharged. According to an embodiment, when the battery is charged or discharged, the electronic device may check the amount of change in resistance of the battery, and may detect whether the battery is rapidly discharged based on the amount of change in resistance.
  • the electronic device may determine a battery abnormal state based on the battery comparison result.
  • the electronic device checks the amount of resistance change during charging of the battery and the amount of resistance change during discharge of the battery, and is based on at least one of the amount of resistance change during charging and the amount of resistance change during discharge of the battery.
  • a resistance value may be instantaneously large. At this time, although the voltage value varies depending on the SOC, there may be little difference in the resistance value.
  • a resistance value in an abnormality state can be detected. For example, when a resistance value measured in real time during charging or discharging rapidly increases by a specified amount of change, for example, about 10% or more, it may be determined that the battery is in an abnormal state due to sudden discharge. When the resistance value increases rapidly as described above, the usage time of the battery rapidly decreases, and thus the resistance value during charging and discharging can be used to check whether there is an abnormality in the battery.
  • the resistance value when the state of the battery is changed to either charging or discharging can be implemented as a function through a preliminary experiment, and the curve by the function for detecting such sudden discharge characteristics and the actual charging or discharging By comparing with the curve, it is possible to diagnose an abnormal state of the battery due to sudden discharge.
  • Resistance values used in the rapid discharge characteristic function may be implemented as shown in [Equation 1] below.
  • R i,eod may be a resistance corresponding to end of discharging
  • R i,eoc may be a resistance corresponding to end of charging
  • FIG. 8 is a diagram illustrating an example of a screen for providing information related to a battery abnormal state according to various embodiments of the present disclosure.
  • the electronic device may notify a user of a battery abnormal state using a battery health indicator.
  • the electronic device may display information on various battery abnormal states together with information on the life of the battery on the screen.
  • the electronic device may display various battery abnormal states such as internal short circuit, swelling, and sudden discharge as a battery health indicator so that the user can check at a glance.
  • the electronic device may classify and notify a battery abnormal state in a plurality of stages, such as a warning to immediately stop charging and a warning notifying that the battery state is unstable.
  • the electronic device may also indicate a complex abnormal state of an internal short circuit and swelling, not a single battery abnormal state, using the battery health indicator.
  • FIG. 9 is a diagram 910 and 920 for explaining a method for generating a battery limit characteristic function according to various embodiments of the present disclosure.
  • a first matrix 910 representing a relationship between a voltage change amount of a battery and a remaining capacity of a battery
  • a second matrix 920 representing a relationship between a change amount of an open circuit voltage of a battery and a remaining capacity of the battery according to various embodiments.
  • a mapping parameter representing the relationship between the amount of change ( ⁇ V) of the output voltage of the battery and the SOH of the battery (for example, the mapping parameter 331 of FIG. 3) is included as a factor. can do.
  • the matrix 910 is a set of mapping parameters, e.g., coefficients Can be included as an argument.
  • mapping parameters when calculating a mapping parameter representing a correlation between the amount of change in the output voltage of the battery and the SOH of the battery, different mapping parameters may be calculated for each charging current. For example, when calculating the mapping parameter representing the correlation between the amount of change in the output voltage of the battery and the SOH of the battery, in the life deterioration experiment, the charging current 1(A), 2(A), and 3(A) are used to determine the battery. In the case of charging, mapping parameters may be calculated for each charging current 1(A), 2(A), and 3(A).
  • a mapping parameter representing the relationship between the change amount ( ⁇ V OCV ) of the open circuit voltage of the battery and the SOH of the battery (for example, the mapping parameter 331 of FIG. 3) can be included as an argument.
  • the amount of change in the open circuit voltage of the battery may be calculated.
  • FIG. 10 is a graph comparing a reference curve implemented as a function using battery limit characteristics and a curve during charge and discharge according to various embodiments.
  • FIG. 11 is a diagram illustrating a battery health index for diagnosing an abnormal battery condition according to various embodiments of the present disclosure.
  • 11 illustrates diagnosis results for each battery (eg, battery A, battery B, battery C, and battery D).
  • the health indicator of the first battery (eg, battery A) 1105 is 14, the health indicator of the second battery (eg, battery B) 1110 is 34, and the third battery (eg : If the health indicator of battery C)(1115) is 3 and the health indicator of the fourth battery (e.g., battery D)(1120) is 7, each battery (1105, 1110, 1115, 1120) is not You can see if it corresponds to the state For example, if the battery health indicator is between 11-7, the a section (1160), the health indicator is between 4-6 and the b section (1150), and the health indicator is between 1-3 and c section ( 1140), the health indicator of the third battery (e.g., battery C) 1115 belongs to section c (1140), and the health indicator of the fourth battery (e.g., battery D) 1120 is section b (1150).
  • the battery health indicator is between 11-7, the a section (1160), the health indicator is between 4-6 and the b section (1150), and the health indicator is between 1-3
  • section c 1140 is designated as a section corresponding to a battery abnormal state due to an internal short circuit
  • the third battery (e.g., battery C) 1115 is a battery abnormal state due to an internal short circuit. have.
  • section b 1150 is designated as a section corresponding to a battery abnormal state due to swelling
  • the fourth battery (eg, battery D) 1120 may be determined to be a battery abnormal state due to swelling.
  • FIG. 11 illustrates three sections such as an internal short-circuit state, a swelling state, and a rapid discharge state, but the type of the battery abnormal state may not be limited thereto.
  • the number of sections may vary depending on the type of battery abnormality.
  • the stability of the second battery (eg, battery B) 1110 having a health indicator of 34 is the highest. .
  • FIG. 12 is a graph showing resistance values during charging and discharging for each remaining capacity of a battery according to various embodiments of the present disclosure.
  • the horizontal axis represents time
  • the vertical axis represents SOC (charging state) of the battery.
  • SOC charging state
  • FIG. 12 when the battery is discharged, each SOC is maintained relatively constant over time, whereas when the battery is charged, each SOC rapidly changes over time.
  • the SOC of the battery is related to the resistance, it is as shown in FIG. 13.
  • 13 is a diagram illustrating resistance values during charging and discharging according to remaining capacity of a battery and resistance values in the case of sudden discharge according to various embodiments of the present disclosure.
  • the electronic device can detect the sudden discharge state even in the case of normal battery life (or charging state) by using the graph at the time of charging and discharging. If it is assumed that the resistance values during charging and discharging according to the remaining capacity of the battery in FIG. 13 and the resistance values in the case of sudden discharge are measured for a battery of a fresh cell, battery aging (or deterioration, Depending on the degree of use), points appear on the graph, which can then be made into a function. As described above, by implementing a matrix in the same format as the function in FIG. 9 and converting it into a database, a graph for detecting a sudden discharge state can be made.
  • FIG. 14 is a graph 1400 illustrating a relationship between a voltage change amount of a battery and a remaining capacity of a battery according to various embodiments of the present disclosure.
  • FIG. 14 is a graph showing the amount of change ( ⁇ V) of the output voltage of the battery according to the SOC of the battery for a specified charging time (or charging time interval) (or at each specified charging time) while charging the battery ( Or a function).
  • the function ( ⁇ V 1 ) of FIG. 14 is the amount of changes in the output voltage of the battery for SOCs corresponding to the functions 411 to 415 in the time interval from the reference time t 0 of FIG. 4 to the time t 1. It can be a function that continuously represents the relationship.
  • the function ( ⁇ V 2 ) of FIG. 14 is a continuous relationship between changes in the output voltage of the battery with respect to the SOCs corresponding to the functions 411 to 415 in the time interval from the reference time t 0 to the time t 2. It may be a function represented by.
  • the function ( ⁇ V k ) of FIG. 14 is a continuous relationship between variations in the output voltage of the battery with respect to the SOCs corresponding to the functions 411 to 415 in the time interval from the reference time t 0 to the time t k. It may be a function represented by.
  • N denotes the order of the function.
  • N representing the order of the function may be set to an optimal value that can represent the relationship between ⁇ V k and SOC k.
  • the coefficient May represent a mapping parameter representing the relationship between ⁇ V k and SOC k in each time interval from the reference time t 0 to the time t 1 to the time t k.
  • the function representing the relationship between the amount of change in the output voltage of the battery and the SOH as shown in [Equation 2] may be a function for detecting swelling, and may be generated through a preliminary experiment like the battery limit characteristic function.
  • An electronic device may be a device of various types.
  • the electronic device may include, for example, a portable communication device (eg, a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance.
  • a portable communication device e.g, a smartphone
  • a computer device e.g., a laptop, a desktop, a tablet, or a smart bracelet
  • a portable multimedia device e.g., a portable medical device
  • a camera e.g., a camera
  • a wearable device e.g., a portable medical device
  • a home appliance e.g., a portable medical device, a portable medical device, a camera, a wearable device, or a home appliance.
  • module used in this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic blocks, parts, or circuits.
  • the module may be an integrally configured component or a minimum unit of the component or a part thereof that performs one or more functions.
  • the module may be implemented in the form of an application-specific integrated circuit (ASIC).
  • ASIC application-specific integrated circuit
  • Various embodiments of the present document include one or more commands stored in a storage medium (eg, internal memory 136 or external memory 138) that can be read by a machine (eg, electronic device 101). It may be implemented as software (for example, the program 140) including them.
  • the processor eg, the processor 120 of the device (eg, the electronic device 101) may call and execute at least one command among one or more commands stored from a storage medium. This enables the device to be operated to perform at least one function according to the at least one command invoked.
  • the one or more instructions may include code generated by a compiler or code executable by an interpreter.
  • a storage medium that can be read by a device may be provided in the form of a non-transitory storage medium.
  • non-transitory only means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and this term refers to the case where data is semi-permanently stored in the storage medium. It does not distinguish between temporary storage cases.
  • a signal e.g., electromagnetic waves
  • a method according to various embodiments disclosed in the present document may be included in a computer program product and provided.
  • Computer program products can be traded between sellers and buyers as commodities.
  • the computer program product is distributed in the form of a device-readable storage medium (e.g. compact disc read only memory (CD-ROM)), or through an application store (e.g. Play Store TM ) or two user devices It can be distributed (e.g., downloaded or uploaded) directly between, e.g. smartphones)
  • a device such as a server of a manufacturer, a server of an application store, or a memory of a relay server.
  • each component (eg, module or program) of the above-described components may include a singular number or a plurality of entities.
  • one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added.
  • a plurality of components eg, a module or program
  • the integrated component may perform one or more functions of each component of the plurality of components in the same or similar to that performed by the corresponding component among the plurality of components prior to the integration. .
  • operations performed by a module, program, or other component may be sequentially, parallel, repeatedly, or heuristically executed, or one or more of the above operations may be executed in a different order or omitted. , Or one or more other actions may be added.
  • the instructions are set to cause the at least one processor to perform at least one operation when executed by at least one processor, and the at least one operation is , An operation of checking the remaining capacity of a battery, an operation of outputting information related to the remaining capacity of a battery when the determined remaining capacity of the battery is less than or equal to a threshold remaining capacity, and an operation of outputting information related to the remaining capacity of the battery, and when the determined remaining capacity is not less than the threshold remaining capacity, the battery During charging or discharging, outputting information related to an abnormal state of the battery based on the voltage or resistance value of the battery may be included.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne, dans divers modes de réalisation, un dispositif électronique pouvant comprendre une batterie, au moins un processeur et une mémoire, la mémoire stockant des instructions qui, lorsqu'elles sont exécutées, amènent le ou les processeurs à : identifier la capacité restante de la batterie; si la capacité restante identifiée de la batterie est inférieure ou égale à une capacité restante seuil, des informations de sortie relatives à la capacité restante de la batterie; et si la capacité restante identifiée n'est pas inférieure ou égale à la capacité restante seuil, des informations de sortie relatives à un état anormal de la batterie sur la base d'une tension ou d'une valeur de résistance de la batterie pendant la charge ou la décharge de la batterie. D'autres modes de réalisation sont possibles.
PCT/KR2020/011653 2019-09-11 2020-08-31 Procédé pour diagnostiquer un état anormal d'une batterie, dispositif électronique associé et support de stockage pour celui-ci WO2021049800A1 (fr)

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CN115356645A (zh) * 2022-10-20 2022-11-18 苏州琞能能源科技有限公司 压辊检测方法、装置、电子设备及存储介质
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KR102621000B1 (ko) * 2021-07-19 2024-01-04 효성중공업 주식회사 배터리 화재 예방 진단 시스템
KR20230016530A (ko) * 2021-07-26 2023-02-02 주식회사 엘지에너지솔루션 배터리 관리 시스템, 배터리 팩, 전기 차량 및 배터리 관리 방법
KR20230037130A (ko) 2021-09-09 2023-03-16 주식회사 엘지에너지솔루션 배터리 셀의 용량 산출 장치 및 방법
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