WO2024101692A1 - 배터리 진단 장치 및 그의 동작 방법 - Google Patents
배터리 진단 장치 및 그의 동작 방법 Download PDFInfo
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- WO2024101692A1 WO2024101692A1 PCT/KR2023/015921 KR2023015921W WO2024101692A1 WO 2024101692 A1 WO2024101692 A1 WO 2024101692A1 KR 2023015921 W KR2023015921 W KR 2023015921W WO 2024101692 A1 WO2024101692 A1 WO 2024101692A1
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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
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- 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
- G01R19/003—Measuring mean values of current or voltage during a given time interval
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- 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
- G01R19/12—Measuring rate of change
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- 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
- G01R19/16528—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values using digital techniques or performing arithmetic operations
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- 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
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
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- 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
- G01R19/30—Measuring the maximum or the minimum value of current or voltage reached in a time interval
-
- 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
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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]
- G01R31/382—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
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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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/56—Testing of electric apparatus
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
Definitions
- Embodiments disclosed in this document relate to a battery diagnosis device and a method of operating the same.
- the secondary battery is a battery capable of charging and discharging, and includes both conventional Ni/Cd batteries, Ni/MH batteries, etc., and recent lithium ion batteries.
- lithium-ion batteries have the advantage of having a much higher energy density than conventional Ni/Cd batteries, Ni/MH batteries, etc.
- lithium-ion batteries can be manufactured in small and light sizes, so they are used as a power source for mobile devices. Recently, its range of use has expanded as a power source for electric vehicles, and it is attracting attention as a next-generation energy storage medium.
- secondary batteries can generally be used as a battery pack that includes a battery module in which a plurality of battery cells are connected in series and/or parallel. Additionally, the secondary battery can be used as a battery rack that includes a plurality of battery modules and a rack frame that accommodates the battery modules.
- Such battery cells, battery modules, battery packs, or battery racks can be used in a variety of devices.
- batteries can be used not only in mobile devices such as mobile phones, laptop computers, smart phones, and smart pads, but also in fields such as electric vehicles (EV, HEV, PHEV) and large power storage systems (ESS).
- EV electric vehicles
- HEV PHEV
- ESS large power storage systems
- the status and operation of these batteries can be managed and controlled by a battery management system (BMS).
- BMS battery management system
- the battery management system may be included with the battery within one device. Additionally, the battery management system can manage and control the battery while being separated from the device containing the battery.
- a method is required to detect an abnormal state of the battery and reduce the possibility of damage to devices including the battery.
- a battery diagnosis device includes an acquisition unit that acquires first voltage values of each of a plurality of battery units, and an identification unit that identifies second voltage values of different standby sections among the first voltage values.
- the determination unit determines average voltage values of the different standby sections of each of the plurality of battery units based on the second voltage values, and The at least one judgment value may be determined based on average voltage values.
- the determination unit determines a voltage slope indicating the degree of change over time in the second voltage values of each of the plurality of battery units, and the diagnosis unit, An abnormality in each of the plurality of battery units may be diagnosed based on the voltage slope.
- the determination unit uses the average and standard deviation of a plurality of voltage slopes corresponding to each of the plurality of battery units on a one-to-one basis to determine each of the plurality of battery units.
- a standard score (Z-score) of the voltage slope is determined, and the diagnostic unit may diagnose an abnormality in each of the plurality of battery units based on the standard score.
- the diagnostic unit may diagnose a battery unit having the standard score lower than a first reference value among the plurality of battery units as an abnormal battery unit.
- the diagnostic unit includes a battery having the standard score lower than a first reference value among the plurality of battery units and the voltage slope lower than a second reference value.
- the unit can be diagnosed as a faulty battery unit.
- the diagnostic unit has the standard score lower than a first reference value among the plurality of battery units and the voltage slope lower than a second reference value, A battery unit in which the difference between the maximum and minimum values of the second voltage values of the different standby sections is higher than a specified difference value may be diagnosed as an abnormal battery unit.
- the identification unit may set the different standby sections as sections having voltage values, current values, charge amount, and/or discharge amount in specified ranges.
- the battery diagnosis device further includes an abnormality processing unit that performs an abnormality processing function based on abnormality diagnosis results of each of the plurality of battery units, and the abnormality processing function includes a notification function or a short circuit. Functions may be included.
- a battery diagnosis method includes an operation of acquiring first voltage values of each of a plurality of battery units, an operation of identifying second voltage values of different standby sections among the first voltage values, An operation of determining at least one determination value indicating a degree of change in the second voltage values of each of the plurality of battery units, and each of the plurality of battery units based on the determination value of each of the plurality of battery units. It may include an operation to diagnose an abnormality.
- the operation of determining the at least one judgment value includes a voltage slope indicating a degree of change over time in the second voltage values of each of the plurality of battery units. and determining an abnormality in each of the plurality of battery units.
- the operation of diagnosing an abnormality in each of the plurality of battery units may include diagnosing an abnormality in each of the plurality of battery units based on the voltage slope.
- the operation of determining the at least one judgment value uses the average and standard deviation of a plurality of voltage slopes corresponding to each of the plurality of battery units on a one-to-one basis. and determining a standard score (Z-score) of voltage slope for each of the plurality of battery units, and diagnosing an abnormality in each of the plurality of battery units, based on the standard score.
- An operation of diagnosing an abnormality in each of the plurality of battery units may be included.
- the operation of diagnosing an abnormality in each of the plurality of battery units includes the battery unit having the standard score lower than the first reference value among the plurality of battery units. It may include an operation of diagnosing a faulty battery unit.
- the operation of diagnosing an abnormality in each of the plurality of battery units includes having the standard score lower than a first reference value among the plurality of battery units, and 2
- the operation of diagnosing a battery unit having the voltage slope lower than a reference value as an abnormal battery unit may be included.
- the operation of diagnosing an abnormality in each of the plurality of battery units includes having the standard score lower than a first reference value among the plurality of battery units, and 2 An operation of diagnosing a battery unit that has the voltage slope lower than a reference value and a difference between a maximum value and a minimum value among the second voltage values of the different standby sections is higher than a specified difference value as an abnormal battery unit. there is.
- a battery diagnostic device and method of operating the same can detect the occurrence of a short circuit or other type of failure within the battery.
- a battery diagnosis device and method of operating the same may process a short circuit or other type of failure within a detected battery.
- 1 is a graph illustrating the difference between the degree of voltage change of a normal battery unit and the degree of voltage change of an abnormal battery unit in standby sections.
- Figure 2 is a block diagram of a battery diagnosis device according to an embodiment.
- FIG. 3A is a graph illustrating an example of setting a standby period after charging a battery unit according to an embodiment.
- FIG. 3B is a graph illustrating an example of setting a standby period after discharging a battery unit according to an embodiment.
- FIG. 4 is a graph illustrating an example of diagnosing an abnormality based on a standard score of a battery unit according to an embodiment.
- Figure 5 is an operation flowchart of a battery diagnosis device according to an embodiment.
- Figure 6 is an operation flowchart of a battery diagnosis device according to an embodiment.
- a or B “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A
- Each of phrases such as “at least one of , B, or C” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof.
- Terms such as “first”, “second”, “first”, “second”, “A”, “B”, “(a)” or “(b)” simply refer to one element as another corresponding element. It can be used to distinguish between and, unless specifically stated to the contrary, does not limit the components in other respects (e.g., importance or order).
- one (e.g. first) component is referred to as “connected” or “coupled” to another (e.g. second) component, with or without the terms “functionally” or “communicatively.”
- “ or “connected,” or “coupled,” or “connected,” means that any component is connected to another component directly (e.g., wired), wirelessly, or via a third component. This means that it can be connected through.
- methods according to various embodiments disclosed in this document may be included and provided in a computer program product.
- Computer program products are commodities and can be traded between sellers and buyers.
- a computer program product may be distributed on a machine-readable storage medium (e.g. compact disc read only memory (CD-ROM)) or distributed online, directly through an application store or between two user devices (e.g. : can be downloaded or uploaded).
- a machine-readable storage medium e.g. compact disc read only memory (CD-ROM)
- CD-ROM compact disc read only memory
- two user devices e.g. : can be downloaded or uploaded.
- at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.
- each component (e.g., module or program) of the above-described components may include a single or plural entity, and some of the plurality of entities may be separately placed in other components.
- one or more of the components or operations described above may be omitted, or one or more other components or operations may be added.
- multiple components eg, modules or programs
- the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component of the plurality of components prior to the integration. .
- operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or , or one or more other operations may be added.
- 1 is a graph illustrating the difference between the degree of voltage change of a normal battery unit and the degree of voltage change of an abnormal battery unit in standby sections.
- a graph 10 showing the voltage 11 of a normal battery unit and the voltage 13 of an abnormal battery unit can be seen.
- the voltage 11 of the normal battery unit has a relatively small voltage value difference in each of the waiting sections (e.g., the waiting section after charging or the waiting section after discharging) where the voltage value is maintained constant. You can.
- the voltage 13 of the abnormal battery unit has a relatively large difference in voltage values in each standby section. For example, the voltage 13 of an abnormal battery unit may decrease significantly as the standby period continues. If a short circuit or other type of failure occurs inside the battery unit, abnormal behavior such as abnormal voltage 13 of the battery unit may be displayed.
- Figure 2 is a block diagram of a battery diagnosis device according to an embodiment.
- the battery diagnosis device 101 may be connected to the electronic device 103 and the user terminal 105 wired and/or wirelessly.
- connection 104 between the battery diagnosis device 101 and the electronic device 103 may be a communication connection through a wired and/or wireless network.
- the wired network may be based on local area network (LAN) communications, or powerline communications.
- the wireless network may be based on a short-range communication network (e.g., Bluetooth, wireless fidelity (WiFi), or infrared data association (IrDA)), or a long-range communication network (cellular network, 4G network, 5G network).
- connection 104 between the battery diagnostic device 101 and the electronic device 103 may be connected via an inter-device communication method (e.g., bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or MIPI). It may be a connection through (mobile industry processor interface).
- an inter-device communication method e.g., bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or MIPI. It may be a connection through (mobile industry processor interface).
- connection 106 between the battery diagnosis device 101 and the user terminal 105 may be a communication connection through a wired and/or wireless network.
- the electronic device 103 may include a mobile device (e.g., a mobile phone, a laptop computer, a smart phone, a smart pad), an electric vehicle (e.g., an electric vehicle (EV), a hybrid EV (HEV), or a plug-in EV (PHEV). It may be a HEV (HEV), a fuel cell EV (FCEV)), an energy storage system (ESS), or a battery swapping system (BSS).
- a mobile device e.g., a mobile phone, a laptop computer, a smart phone, a smart pad
- an electric vehicle e.g., an electric vehicle (EV), a hybrid EV (HEV), or a plug-in EV (PHEV). It may be a HEV (HEV), a fuel cell EV (FCEV)), an energy storage system (ESS), or a battery swapping system (BSS).
- HEV HEV
- FCEV fuel cell EV
- ESS energy storage system
- BSS battery swapping system
- the electronic device 103 may include one or more battery units 111, 113, and 115.
- Each of the one or more battery units 111, 113, and 115 may be a battery cell, a battery module, a battery pack, or a battery rack.
- the user terminal 105 may be a mobile device (eg, a mobile phone, a laptop computer, a smart phone, a smart pad), or a personal computer (PC).
- a mobile device eg, a mobile phone, a laptop computer, a smart phone, a smart pad
- PC personal computer
- the battery diagnosis device 101 may include a communication circuit 120, a sensor 130, a memory 140, and a processor 150.
- the battery diagnosis device 101 shown in FIG. 2 may further include at least one component (e.g., a display, an input device, or an output device) other than the components shown in FIG. 2. .
- the communication circuit 120 establishes a wired communication channel and/or a wireless communication channel between the battery diagnostic device 101 and the electronic device 103 and/or the user terminal 105, and Data can be transmitted and received with the electronic device 103 and/or the user terminal 105.
- the senor 130 may obtain values related to the states of the battery units 111, 113, and 115 of the electronic device 103.
- the state-related values include voltage, current, resistance, state of charge (SOC), state of health (SOH), or temperature of the battery units 111, 113, and 115, Or, it may represent one or more values for a combination thereof.
- values related to the state may be referred to as 'state values'.
- memory 140 may include volatile memory and/or non-volatile memory.
- the memory 140 may store data used by at least one component (eg, the processor 150) of the battery diagnosis device 101.
- data may include software (or instructions related thereto), input data, or output data.
- the command when executed by the processor 150, the command may cause the battery abnormality diagnosis device 101 to perform operations defined by the command.
- the memory 140 includes one or more software (e.g., an acquisition unit 141, an identification unit 143, a determination unit 145, a diagnosis unit 147, and an abnormality processing unit 149). can do.
- software e.g., an acquisition unit 141, an identification unit 143, a determination unit 145, a diagnosis unit 147, and an abnormality processing unit 149.
- the processor 150 may include a central processing unit, an application processor, a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor.
- a central processing unit an application processor, a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor.
- NPU neural processing unit
- image signal processor a sensor hub processor
- communication processor a communication processor.
- the processor 150 executes software (e.g., acquisition unit 141, identification unit 143, determination unit 145, diagnosis unit 147, and abnormality processing unit 149) to execute the processor ( At least one other component (eg, hardware or software component) of the battery diagnosis device 101 connected to 150) can be controlled and various data processing or calculations can be performed.
- software e.g., acquisition unit 141, identification unit 143, determination unit 145, diagnosis unit 147, and abnormality processing unit 149
- At least one other component eg, hardware or software component of the battery diagnosis device 101 connected to 150
- various data processing or calculations can be performed.
- FIG. 3A is a graph illustrating an example of setting a standby period after charging a battery unit according to an embodiment.
- FIG. 3B is a graph illustrating an example of setting a standby period after discharging a battery unit according to an embodiment.
- FIG. 4 is a graph illustrating an example of diagnosing an abnormality based on a standard score of a battery unit according to an embodiment.
- FIGS. 3A, 3B, and 4 can be explained using the configurations of FIG. 2.
- the acquisition unit 141 may acquire first voltage values of each of the plurality of battery units 111, 113, and 115. In one embodiment, the acquisition unit 141 may acquire a plurality of voltage profiles indicating voltage changes over time for each of the plurality of battery units 111, 113, and 115. The acquisition unit 141 may acquire the first voltage values based on a plurality of acquired voltage profiles.
- the acquisition unit 141 acquires the first voltage values of each of the plurality of battery units 111, 113, and 115 through the electronic device 103 connected through a wired and/or wireless network. You can.
- the identification unit 143 may identify second voltage values of different standby sections among the first voltage values. In one embodiment, the identification unit 143 may set the different standby sections as sections having voltage values, current values, charge amounts, and/or discharge amounts within specified ranges. The identification unit 143 extracts the different standby sections for each of the plurality of battery units 111, 113, and 115 from the obtained plurality of voltage profiles, and divides the second voltage values in the corresponding sections into a plurality of Each battery unit 111, 113, and 115 can be identified.
- the different waiting sections may be different waiting sections after charging or different waiting sections after discharging.
- the charging section (S1) and the standby section (S2) after charging can be confirmed in the graph 310.
- the identification unit 143 may identify a charging section S1 having a specified charge amount in the plurality of SOC profiles of each of the plurality of battery units 111, 113, and 115.
- the acquisition unit 141 may acquire a plurality of SOC profiles for each of the plurality of battery units 111, 113, and 115 through the electronic device 103 connected through a wired and/or wireless network. .
- the identification unit 143 extracts the standby section (S2) after charging based on the voltage value and/or current value of each of the plurality of battery units (111, 113, and 115) after the charging section (S1). can do.
- the identification unit 143 extracts the section in which the current value of the battery unit 111, 113, or 115 is within the first current range (e.g., the range of 0A to 1A) as the standby section (S2) after charging. can do.
- the identification unit 143 may identify a discharge section S3 having a specified discharge amount in the plurality of SOC profiles of each of the plurality of battery units 111, 113, and 115. In one embodiment, the identification unit 143 extracts the standby section S4 after discharging based on the voltage value and/or current value of each of the plurality of battery units 111, 113, and 115 after the discharge section S3. can do.
- the identification unit 143 selects the section in which the current value of the battery unit 111, 113, or 115 is within the second current range (e.g., -1A or more and 0A or less) as the standby section (S2) after charging. It can be extracted.
- the second current range e.g., -1A or more and 0A or less
- the identification unit 143 identifies a plurality of battery units 111, 113, and 115 in the extracted different waiting sections (e.g., different waiting sections after charging or different waiting sections after discharging). ) Each second voltage value can be identified.
- the determination unit 145 may determine at least one determination value indicating the degree of change in the second voltage values of each of the plurality of battery units 111, 113, and 115.
- the at least one judgment value may include a voltage slope and/or a standard score (Z-score) of the voltage slope.
- the determination unit 145 may determine a voltage slope indicating a degree of change over time in the second voltage values of each of the plurality of battery units 111, 113, and 115. In one embodiment, the determination unit 145 determines different standby periods (e.g., different standby periods after charging or Average voltage values of different post-discharge standby sections) can be determined. The decision unit 145 may determine the voltage slope based on the average voltage values. For example, the decision unit 145 may determine average voltage values in different standby sections after charging for each of the plurality of battery units 111, 113, and 115, as shown in Table 1 below.
- the average voltage of the battery unit 111 remains constant at 4.0514, 4.0513, and 4.0513 even after repeated standby sections after charging, while the battery unit 113 continues through several standby sections after charging. It can be seen that the average voltage relatively decreases to 4.0502, 4.0495, and 4.0485.
- the determination unit 145 may determine average voltage values in different standby periods after discharging for each of the plurality of battery units 111, 113, and 115, as shown in Table 2 below.
- the average voltage of the battery unit 111 remains constant at 3.5122, 3.5122, and 3.5122 even after repeated waiting sections after discharging, while the battery unit 113 repeats the waiting sections after discharging. It can be seen that the average voltage relatively decreases to 3.5125, 3.5102, and 3.5088.
- the decision unit 145 may determine the voltage slope based on a linear regression method. For example, the determination unit 145 uses all of the second voltage values of each of the plurality of battery units 111, 113, and 115 as input factors to determine the plurality of battery units 111 and 113 based on a linear regression method. , 115), a plurality of voltage slopes can be determined for each. As another example, the decision unit 145 uses average voltage values in different standby sections of each of the plurality of battery units 111, 113, and 115 as input factors to determine the plurality of voltage slopes based on a linear regression method. can decide.
- the determination unit 145 uses the average and standard deviation of a plurality of voltage slopes corresponding one-to-one to each of the plurality of battery units 111, 113, and 115. 113, 115) For each, the standard score of the voltage slope can be determined. For example, the decision unit 145 may determine the standard score according to Equation 1 below.
- Equation 1 z means the standard score of the voltage slope of the battery unit (111, 113, or 115), x means the voltage slope of the battery unit (111, 113, or 115), and ⁇ is It means the average of a plurality of voltage slopes corresponding one-to-one to each of the plurality of battery units 111, 113, and 115, and ⁇ means the standard deviation.
- the diagnostic unit 147 determines an abnormality in each of the plurality of battery units 111, 113, and 115 based on the at least one determination value (e.g., voltage slope and/or standard score of voltage slope). It can be diagnosed.
- the at least one determination value e.g., voltage slope and/or standard score of voltage slope
- the diagnostic unit 147 may diagnose a battery unit with a standard score lower than the first reference value among the plurality of battery units 111, 113, and 115 as a defective battery unit. For example, referring to FIG. 4 , the diagnosis unit 147 may diagnose all battery units having a standard score lower than the first reference value of the graph 400 as abnormal battery units.
- the diagnostic unit 147 determines a battery unit among the plurality of battery units 111, 113, and 115 that has the standard score lower than a first reference value and a voltage slope lower than the second reference value as abnormal. It can be diagnosed with the battery unit.
- the diagnostic unit 147 has the standard score lower than the first reference value among the plurality of battery units 111, 113, and 115, has a voltage slope lower than the second reference value, and has different standby conditions.
- a battery unit in which the difference between the maximum and minimum values of the second voltage values of the sections is higher than a specified difference value may be diagnosed as an abnormal battery unit.
- the diagnostic unit 147 determines the voltage slope, the standard score of the voltage slope, and the difference between the maximum and minimum values for each of the plurality of battery units 111, 113, and 115, as shown in Table 3 below. Based on this, abnormalities in the battery unit can be diagnosed.
- battery unit 111 113 ... 115 voltage slope 0.000231 -0.003 ... 0.0002 Standard score for voltage slope 0.27735 -3.6055 ... 0.27735 Difference between maximum and minimum values 0.013 0.045 ... 0.013
- the battery unit 113 in [Table 3] has a standard score of -3.6055 lower than the first reference value. Since it has a voltage slope of -0.003 that is lower than the second reference value and a difference of 0.045 between the maximum value and the minimum value that is greater than the specified difference value, the diagnostic unit 147 can diagnose the battery unit 113 as an abnormal battery unit. You can.
- the abnormality processing unit 149 may perform an abnormality processing function based on abnormality diagnosis results of the plurality of battery units 111, 113, and 115.
- the abnormality processing function may include a notification function or a short-circuit function.
- the abnormality processing unit 149 may transmit abnormality diagnosis results of the plurality of battery units 111, 113, and 115 to the user terminal 105 connected through a wired and/or wireless network.
- the abnormality processing unit 149 may isolate the abnormal battery unit from the electronic device 103 based on the abnormality diagnosis results of the plurality of battery units 111, 113, and 115.
- isolation may include electrical and/or mechanical isolation.
- Figure 5 is an operation flowchart of a battery diagnosis device according to an embodiment.
- FIG. 5 can be explained using the configurations of FIG. 2 .
- FIG. 5 is only one embodiment, and the order of steps according to various embodiments of the present invention may be different from that shown in FIG. 5, and some steps shown in FIG. 5 may be omitted or the order between steps may be different. Changes may be made or steps may be merged.
- the battery diagnosis device 101 may obtain first voltage values of each of the plurality of battery units 111, 113, and 115.
- the battery diagnosis device 101 may obtain a plurality of voltage profiles indicating voltage changes over time for each of the plurality of battery units 111, 113, and 115.
- the battery diagnosis device 101 may obtain the first voltage values based on a plurality of acquired voltage profiles.
- the battery diagnosis device 101 obtains first voltage values of each of the plurality of battery units 111, 113, and 115 through an electronic device 103 connected through a wired and/or wireless network. can do.
- the battery diagnosis device 101 may identify second voltage values of different standby sections among the first voltage values obtained in operation 505.
- the battery diagnosis device 101 may set the different standby sections as sections having voltage values, current values, charge amount, and/or discharge amount within specified ranges.
- the battery diagnosis device 101 extracts the different standby sections for each of the plurality of battery units 111, 113, and 115 from the obtained plurality of voltage profiles, and selects a plurality of second voltage values in the corresponding sections.
- the battery units 111, 113, and 115 can be identified.
- the different waiting sections may be different waiting sections after charging or different waiting sections after discharging.
- the battery diagnosis device 101 may determine at least one determination value indicating the degree of change in the second voltage values identified in operation 510 of each of the plurality of battery units 111, 113, and 115.
- the at least one judgment value may include a voltage slope and/or a standard score (Z-score) of the voltage slope.
- the battery diagnosis device 101 may determine a voltage slope indicating a degree of change over time in the second voltage values of each of the plurality of battery units 111, 113, and 115. In one embodiment, the battery diagnosis device 101 determines different standby sections (e.g., different post-charge standby sections) of each of the plurality of battery units 111, 113, and 115 based on the second voltage values. Or, average voltage values of different post-discharge standby sections) can be determined. The battery diagnosis device 101 may determine the voltage slope based on the average voltage values.
- the battery diagnosis device 101 may determine the voltage slope based on a linear regression method. For example, the battery diagnosis device 101 uses all of the second voltage values of each of the plurality of battery units 111, 113, and 115 as input factors to diagnose the plurality of battery units 111, 115 based on a linear regression method. 113, 115) A plurality of voltage slopes can be determined for each. As another example, the battery diagnosis device 101 uses average voltage values in different standby sections of each of the plurality of battery units 111, 113, and 115 as input factors to determine the plurality of voltages based on a linear regression method. The slopes can be determined.
- the battery diagnosis device 101 uses the average and standard deviation of a plurality of voltage slopes corresponding one-to-one to each of the plurality of battery units 111, 113, and 115. , 113, 115), the standard score of the voltage slope can be determined for each.
- the battery diagnosis device 101 may diagnose an abnormality in each of the plurality of battery units 111, 113, and 115 based on at least one determination value determined in operation 515.
- Operation 520 in which the battery diagnosis device 101 diagnoses an abnormality in each of the plurality of battery units 111, 113, and 115, can be described in more detail with reference to FIG. 6.
- Figure 6 is an operation flowchart of a battery diagnosis device according to an embodiment.
- FIG. 6 can be explained using the configurations of FIG. 2 .
- FIG. 6 is only an example, and the order of steps according to various embodiments of the present invention may be different from that shown in FIG. 6, and some steps shown in FIG. 6 may be omitted or the order between steps may be different. Changes may be made or steps may be merged. For example, operation 615 and/or operation 620 in FIG. 6 may be omitted.
- the battery diagnosis device 101 may identify whether the standard score of the voltage slope of the battery unit 111, 113, or 115 is less than the first reference value.
- the battery diagnosis device 101 determines the battery unit 111 , 113, or 115) can be diagnosed as a normal battery unit.
- the battery diagnosis device 101 determines the battery unit 111 , 113, or 115), it can be determined whether the voltage slope is less than the second reference value.
- the battery diagnosis device 101 determines the battery unit 111, 113, or 115. Alternatively, 115) can be diagnosed as a normal battery unit.
- the battery diagnosis device 101 determines the battery unit 111, 113, or 115. Alternatively, it may be determined whether the difference between the maximum value and the minimum value among the second voltage values of 115) exceeds a specified difference value.
- the battery diagnosis device 101 can diagnose the battery unit 111, 113, or 115 as a normal battery unit.
- the battery diagnosis device (101) may diagnose the battery unit (111, 113, or 115) as a defective battery unit.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
Description
| 대기 구간 | 배터리 유닛 | |||
| 111 | 113 | ... | 115 | |
| 제1 충전 후 대기 구간 | 4.0514 | 4.0502 | ... | 4.0531 |
| 제2 충전 후 대기 구간 | 4.0513 | 4.0495 | ... | 4.0531 |
| 제3 충전 후 대기 구간 | 4.0513 | 4.0485 | ... | 4.0530 |
| 대기 구간 | 배터리 유닛 | |||
| 111 | 113 | ... | 115 | |
| 제1 방전 후 대기 구간 | 3.5122 | 3.5125 | ... | 3.5122 |
| 제2 방전 후 대기 구간 | 3.5122 | 3.5102 | ... | 3.5122 |
| 제3 방전 후 대기 구간 | 3.5122 | 3.5088 | ... | 3.5122 |
| 배터리 유닛 | ||||
| 111 | 113 | ... | 115 | |
| 전압 기울기 | 0.000231 | -0.003 | ... | 0.0002 |
| 전압 기울기의 표준 점수 | 0.27735 | -3.6055 | ... | 0.27735 |
| 최대값과 최소값의 차이 | 0.013 | 0.045 | ... | 0.013 |
Claims (15)
- 복수의 배터리 유닛들 각각의 제1 전압 값들을 획득하는 획득부;상기 제1 전압 값들 중 서로 다른 대기 구간들의 제2 전압 값들을 식별하는 식별부;상기 복수의 배터리 유닛들 각각의 상기 제2 전압 값들의 변화 정도를 나타내는 적어도 하나의 판단 값을 결정하는 결정부; 및상기 복수의 배터리 유닛들 각각의 상기 판단 값에 기초하여 상기 복수의 배터리 유닛들 각각의 이상을 진단하는 진단부를 포함하는, 배터리 진단 장치.
- 청구항 1에 있어서,상기 결정부는,상기 제2 전압 값들에 기초하여, 상기 복수의 배터리 유닛들 각각의 상기 서로 다른 대기 구간들의 평균 전압 값들을 결정하고,상기 평균 전압 값들에 기초하여 상기 적어도 하나의 판단 값을 결정하는, 배터리 진단 장치.
- 청구항 1에 있어서,상기 결정부는, 상기 복수의 배터리 유닛들 각각의 상기 제2 전압 값들의 시간에 따른 변화 정도를 나타내는 전압 기울기를 결정하고,상기 진단부는, 상기 전압 기울기에 기초하여 상기 복수의 배터리 유닛들 각각의 이상을 진단하는, 배터리 진단 장치.
- 청구항 3에 있어서,상기 결정부는, 상기 복수의 배터리 유닛들 각각에 일대일로 대응되는 복수의 전압 기울기들의 평균과 표준 편차를 이용하여 상기 복수의 배터리 유닛들 각각에 대해 전압 기울기의 표준 점수(Z-score)를 결정하고,상기 진단부는, 상기 표준 점수에 기초하여 상기 복수의 배터리 유닛들 각각의 이상을 진단하는, 배터리 진단 장치.
- 청구항 4에 있어서,상기 진단부는, 상기 복수의 배터리 유닛들 중 제1 기준 값보다 낮은 상기 표준 점수를 갖는 배터리 유닛을 이상 배터리 유닛으로 진단하는, 배터리 진단 장치.
- 청구항 4에 있어서,상기 진단부는, 상기 복수의 배터리 유닛들 중 제1 기준 값보다 낮은 상기 표준 점수를 갖고, 제2 기준 값보다 낮은 상기 전압 기울기를 갖는 배터리 유닛을 이상 배터리 유닛으로 진단하는, 배터리 진단 장치.
- 청구항 4에 있어서,상기 진단부는, 상기 복수의 배터리 유닛들 중 제1 기준 값보다 낮은 상기 표준 점수를 갖고, 제2 기준 값보다 낮은 상기 전압 기울기를 갖고, 상기 서로 다른 대기 구간들의 상기 제2 전압 값들 중 최대 값과 최소 값의 차이가 지정된 차이 값보다 높은 배터리 유닛을 이상 배터리 유닛으로 진단하는, 배터리 진단 장치.
- 청구항 1에 있어서,상기 식별부는, 상기 서로 다른 대기 구간들을 지정된 범위의 전압 값, 전류 값, 충전량, 및/또는 방전량을 갖는 구간으로 설정하는, 배터리 진단 장치.
- 청구항 1에 있어서,상기 복수의 배터리 유닛들 각각의 이상 진단 결과에 기초하여 이상 처리 기능을 수행하는 이상 처리부를 더 포함하고,상기 이상 처리 기능은 알림 기능 또는 단락 기능을 포함하는, 배터리 진단 장치.
- 복수의 배터리 유닛들 각각의 제1 전압 값들을 획득하는 동작;상기 제1 전압 값들 중 서로 다른 대기 구간들의 제2 전압 값들을 식별하는 동작;상기 복수의 배터리 유닛들 각각의 상기 제2 전압 값들의 변화 정도를 나타내는 적어도 하나의 판단 값을 결정하는 동작; 및상기 복수의 배터리 유닛들 각각의 상기 판단 값에 기초하여 상기 복수의 배터리 유닛들 각각의 이상을 진단하는 동작을 포함하는, 배터리 진단 방법.
- 청구항 10에 있어서,상기 적어도 하나의 판단 값을 결정하는 동작은, 상기 복수의 배터리 유닛들 각각의 상기 제2 전압 값들의 시간에 따른 변화 정도를 나타내는 전압 기울기를 결정하는 동작을 포함하고,상기 복수의 배터리 유닛들 각각의 이상을 진단하는 동작은, 상기 전압 기울기에 기초하여 상기 복수의 배터리 유닛들 각각의 이상을 진단하는 동작을 포함하는, 배터리 진단 방법.
- 청구항 11에 있어서,상기 적어도 하나의 판단 값을 결정하는 동작은, 상기 복수의 배터리 유닛들 각각에 일대일로 대응되는 복수의 전압 기울기들의 평균과 표준 편차를 이용하여 상기 복수의 배터리 유닛들 각각에 대해 전압 기울기의 표준 점수(Z-score)를 결정하는 동작을 포함하고,상기 복수의 배터리 유닛들 각각의 이상을 진단하는 동작은, 상기 표준 점수에 기초하여 상기 복수의 배터리 유닛들 각각의 이상을 진단하는 동작을 포함하는, 배터리 진단 방법.
- 청구항 12에 있어서,상기 복수의 배터리 유닛들 각각의 이상을 진단하는 동작은, 상기 복수의 배터리 유닛들 중 제1 기준 값보다 낮은 상기 표준 점수를 갖는 배터리 유닛을 이상 배터리 유닛으로 진단하는 동작을 포함하는, 배터리 진단 방법.
- 청구항 12에 있어서,상기 복수의 배터리 유닛들 각각의 이상을 진단하는 동작은, 상기 복수의 배터리 유닛들 중 제1 기준 값보다 낮은 상기 표준 점수를 갖고, 제2 기준 값보다 낮은 상기 전압 기울기를 갖는 배터리 유닛을 이상 배터리 유닛으로 진단하는 동작을 포함하는, 배터리 진단 장치.
- 청구항 12에 있어서,상기 복수의 배터리 유닛들 각각의 이상을 진단하는 동작은, 상기 복수의 배터리 유닛들 중 제1 기준 값보다 낮은 상기 표준 점수를 갖고, 제2 기준 값보다 낮은 상기 전압 기울기를 갖고, 상기 서로 다른 대기 구간들의 상기 제2 전압 값들 중 최대 값과 최소 값의 차이가 지정된 차이 값보다 높은 배터리 유닛을 이상 배터리 유닛으로 진단하는 동작을 포함하는, 배터리 진단 장치.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2023376086A AU2023376086A1 (en) | 2022-11-11 | 2023-10-16 | Battery diagnosis apparatus and operating method thereof |
| JP2025526844A JP2025536054A (ja) | 2022-11-11 | 2023-10-16 | 電池診断装置およびその動作方法 |
| EP23888955.4A EP4600676A4 (en) | 2022-11-11 | 2023-10-16 | BATTERY DIAGNOSTIC DEVICE AND ITS OPERATING PROCESS |
| CN202380077967.7A CN120225891A (zh) | 2022-11-11 | 2023-10-16 | 电池诊断装置及其操作方法 |
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| KR1020220151068A KR20240069506A (ko) | 2022-11-11 | 2022-11-11 | 배터리 진단 장치 및 그의 동작 방법 |
| KR10-2022-0151068 | 2022-11-11 |
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| PCT/KR2023/015921 Ceased WO2024101692A1 (ko) | 2022-11-11 | 2023-10-16 | 배터리 진단 장치 및 그의 동작 방법 |
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| EP (1) | EP4600676A4 (ko) |
| JP (1) | JP2025536054A (ko) |
| KR (1) | KR20240069506A (ko) |
| CN (1) | CN120225891A (ko) |
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| WO2025259078A1 (ko) * | 2024-06-11 | 2025-12-18 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치, 배터리 관리 방법 및 배터리 시스템 |
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| KR20210059566A (ko) * | 2019-11-15 | 2021-05-25 | 삼성에스디아이 주식회사 | 이상 셀 검출 장치, 배터리 시스템 및 배터리 시스템의 이상 셀 검출 방법 |
| KR20220015799A (ko) * | 2020-07-31 | 2022-02-08 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치 및 방법 |
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| KR20220151068A (ko) | 2021-05-04 | 2022-11-14 | 주식회사 모핀 | 자본시장 오픈 api를 활용한 공모주청약 통합중개 플랫폼 서비스를 제공하는 방법, 서버, 및 이를 위한 시스템 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20240069507A (ko) * | 2022-11-11 | 2024-05-20 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치 및 그의 동작 방법 |
| KR20240069508A (ko) * | 2022-11-11 | 2024-05-20 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치 및 그의 동작 방법 |
-
2022
- 2022-11-11 KR KR1020220151068A patent/KR20240069506A/ko active Pending
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2023
- 2023-10-16 CN CN202380077967.7A patent/CN120225891A/zh active Pending
- 2023-10-16 AU AU2023376086A patent/AU2023376086A1/en active Pending
- 2023-10-16 EP EP23888955.4A patent/EP4600676A4/en active Pending
- 2023-10-16 JP JP2025526844A patent/JP2025536054A/ja active Pending
- 2023-10-16 WO PCT/KR2023/015921 patent/WO2024101692A1/ko not_active Ceased
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| EP4600676A4 (en) | 2026-01-14 |
| EP4600676A1 (en) | 2025-08-13 |
| KR20240069506A (ko) | 2024-05-20 |
| CN120225891A (zh) | 2025-06-27 |
| JP2025536054A (ja) | 2025-10-30 |
| AU2023376086A1 (en) | 2025-05-15 |
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