WO2024112072A1 - Soh 예측 장치 및 이의 동작 방법 - Google Patents
Soh 예측 장치 및 이의 동작 방법 Download PDFInfo
- Publication number
- WO2024112072A1 WO2024112072A1 PCT/KR2023/018799 KR2023018799W WO2024112072A1 WO 2024112072 A1 WO2024112072 A1 WO 2024112072A1 KR 2023018799 W KR2023018799 W KR 2023018799W WO 2024112072 A1 WO2024112072 A1 WO 2024112072A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- soh
- data
- prediction device
- impedance
- eis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- 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
-
- 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
Definitions
- Embodiments disclosed in this document relate to an SOH prediction 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 much higher energy density than conventional Ni/Cd batteries, Ni/MH batteries, etc.
- lithium-ion batteries can be made small and lightweight, so they are used as a power source for mobile devices. Recently, their range of use has expanded to a power source for electric vehicles, and they are attracting attention as a next-generation energy storage medium.
- a battery exchange system exists as a service related to these secondary batteries.
- the battery exchange system can provide users with a service that exchanges a discharged battery with a charged battery.
- Such a battery exchange system may use a method of measuring the lifespan of a battery used for service.
- electrochemical impedance spectroscopy EIS
- EIS electrochemical impedance spectroscopy
- An SOH prediction device includes an EIS data acquisition unit that acquires EIS (electrochemical impedance spectroscopy) data of a battery, a feature point identification unit that identifies feature points in the EIS data, and the feature points based on the feature points.
- a resistance parameter calculation unit that calculates a resistance parameter of the battery, and an SOH that determines the state of health (SOH) of the battery according to the resistance parameter from the temperature at which the EIS data is obtained, the relationship data between the resistance parameter and the SOH. It may include a decision part.
- the first feature point among the feature points may be determined based on the size of the real part of the EIS data.
- the first feature point among the feature points may represent an impedance having the smallest real part in the EIS data or an impedance within a preset range from the impedance having the smallest real part.
- a second feature point among the feature points may be determined based on the size of the imaginary part of the EIS data.
- the second feature point among the feature points has the highest absolute value of the magnitude of the imaginary part impedance among the frequencies at which the Warburg impedance appears in the EIS data and the frequency region smaller than the frequency at which the Warburg impedance appears. It may represent the impedance of a small point or the impedance within a preset range from the point where the absolute value is the smallest.
- the resistance parameter may be determined based on a value obtained by subtracting the real part value of the first feature point from the real part value of the second feature point among the feature points.
- the relationship data is first EIS data of a reference battery obtained at a specified state of charge (SOC), a specified SOH, and a specified first temperature under a specified time condition, at the specified time condition, It is obtained through comparison between the specified SOC, the specified SOH, and the second EIS data of the reference battery obtained at specified second temperatures, and the first temperatures and the second temperatures may be different from each other.
- SOC state of charge
- SOH specified SOH
- second EIS data of the reference battery obtained at specified second temperatures It is obtained through comparison between the specified SOC, the specified SOH, and the second EIS data of the reference battery obtained at specified second temperatures, and the first temperatures and the second temperatures may be different from each other.
- the SOH prediction device generates formula candidates indicating the tendency of the first EIS data, selects a formula with the smallest error among the formula candidates through the second EIS data, and selects a formula with the smallest error. It may include a relationship data generator that generates relationship data between the resistance parameter and the SOH at third temperatures different from the first and second temperatures through a small equation.
- the temperature range of the first temperatures may include the temperature range of the second temperatures.
- a method of operating an SOH prediction device includes obtaining electrochemical impedance spectroscopy (EIS) data of a battery including at least one battery cell, identifying feature points in the EIS data, and Calculating a resistance parameter of the battery based on characteristic points, and determining the state of health (SOH) of the battery according to the resistance parameter from the temperature at which the EIS data is obtained, the relationship data between the resistance parameter and the SOH. It may include a decision-making action.
- EIS electrochemical impedance spectroscopy
- SOH state of health
- the first feature point among the feature points may be determined based on the size of the real part of the EIS data.
- the first feature point among the feature points may represent an impedance having the smallest real part in the EIS data or an impedance within a preset range from the impedance having the smallest real part.
- a second feature point among the feature points may be determined based on the size of the imaginary part of the EIS data.
- the second feature point among the feature points is the frequency at which the Warburg impedance appears in the EIS data and the absolute value of the magnitude of the imaginary part impedance in the frequency region smaller than the frequency at which the Warburg impedance appears. It may represent the impedance at the smallest point or the impedance within a preset range from the point where the absolute value is the smallest.
- the resistance parameter may be determined based on a value obtained by subtracting the real part value of the first feature point from the real part value of the second feature point among the feature points.
- the relationship data is first EIS data of a reference battery obtained at a specified state of charge (SOC), a specified SOH, and a specified first temperature under a specified time condition, at the specified time condition, It is obtained through comparison between the specified SOC, the specified SOH, and the second EIS data of the reference battery obtained at specified second temperatures, and the first temperatures and the second temperatures may be different from each other.
- SOC state of charge
- SOH specified SOH
- second EIS data of the reference battery obtained at specified second temperatures It is obtained through comparison between the specified SOC, the specified SOH, and the second EIS data of the reference battery obtained at specified second temperatures, and the first temperatures and the second temperatures may be different from each other.
- a method of operating an SOH prediction device includes generating formula candidates indicating a tendency of the first EIS data, selecting a formula with the smallest error among the formula candidates through the second EIS data, and The method may further include generating relationship data between the resistance parameter and the SOH at third temperatures different from the first and second temperatures through the equation with the smallest error.
- the temperature range of the first temperatures may include the temperature range of the second temperatures.
- the SOH prediction device and its operating method can predict SOH according to resistance parameters without collecting EIS data at all temperatures. Accordingly, the SOH prediction device and its operating method according to resistance parameters according to various embodiments disclosed in this document can reduce the cost and time for collecting EIS data.
- the SOH prediction device and its operating method according to various embodiments disclosed in this document can prevent problems caused by fitting EIS data to an equivalent circuit by approximating the resistance parameter through the reformation and coordinates of EIS data.
- FIG. 1 is a block diagram of an SOH prediction device according to an embodiment of the present disclosure.
- Figure 2 illustrates an EIS graph according to an embodiment of the present disclosure.
- FIG. 3 illustrates a temperature-resistance parameter graph according to an embodiment of the present disclosure.
- Figure 5 is a flowchart showing a method of operating an SOH prediction device according to an embodiment of the present disclosure.
- Figure 6 is a flowchart showing a method of operating an SOH prediction device according to an embodiment of the present disclosure.
- 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 the element in question. 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).
- “or “connected,” or “coupled,” or “connected” it means that any component is connected to another component directly (e.g., wired or wirelessly), or indirectly ( This means that it can be connected (e.g. via a third component).
- Computer program products are commodities and can be traded between sellers and buyers.
- a computer program product may be distributed in the form of 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
- 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 are separately arranged in other components. It could be. According to embodiments disclosed in this document, one or more of the above-described components or operations may be omitted, or one or more other components or operations may be added. Alternatively or additionally, multiple components (eg, modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each 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. , may be omitted, or one or more other operations may be added.
- FIG. 1 is a block diagram of an apparatus 100 for predicting a state of health (SOH) according to a resistance parameter according to an embodiment of the present disclosure.
- Figure 2 illustrates an EIS graph according to an embodiment of the present disclosure.
- 3 illustrates a temperature-resistance parameter graph 310 according to an embodiment of the present disclosure.
- 4 illustrates graphs according to equations approximating a temperature-resistance parameter graph according to an embodiment of the present disclosure.
- the SOH prediction device 100 may calculate a resistance parameter of the battery pack 110. In one embodiment, the SOH prediction device 100 may determine the SOH of the battery pack 110 based on the resistance parameter of the battery pack 110.
- the battery pack 110 may include a plurality of battery cells 111, 113, and 115.
- the battery pack 110 may be a battery for providing power to a two-wheeled electric vehicle (eg, electric bike). Here, the two-wheeled electric vehicle may be capable of replacing the battery pack 110.
- the resistance parameter of the battery pack 110 is calculated, but it is not limited to this example, and the SOH prediction device 100 may be configured to calculate the resistance parameter of the battery module, etc. .
- the SOH prediction device 100 may be formed integrally with the battery pack 110. In this case, the SOH prediction device 100 may be included in the battery management system (BMS) of the battery pack 110.
- BMS battery management system
- the SOH prediction device 100 may be formed separately from the battery pack 110.
- the SOH prediction device 100 may be included in a battery swapping system (BSS).
- BSS battery swapping system
- the BSS may be a system that has a slot into which the battery pack 110 can be inserted and can charge the battery pack 110 through the slot.
- the SOH prediction device 100 may be connected to the battery pack 110 through a network (eg, wired or wireless).
- the SOH prediction device 100 may be implemented through a cloud server.
- the SOH prediction device 100 includes an electrochemical impedance spectroscopy (EIS) data acquisition unit 120, a feature point identification unit 130, a resistance parameter calculation unit 140, an SOH determination unit 150, and relationship data. (160), and may include a relationship data generator 170.
- EIS electrochemical impedance spectroscopy
- the EIS data acquisition unit 120 may acquire EIS data of the battery.
- the EIS data acquisition unit 120 may acquire the EIS data 200 in units of the battery pack 110, but the example is not limited to this.
- the EIS data acquisition unit 120 may directly obtain EIS data by applying current and/or voltage to the battery pack 110.
- the EIS data acquisition unit 120 may include circuits for applying current and/or voltage and a processor for configuring EIS data according to the current and/or voltage.
- the EIS data acquisition unit 120 may indirectly obtain EIS data from the battery pack 110.
- the EIS data acquisition unit 120 may receive EIS data acquired by the battery pack 110.
- the EIS data acquisition unit 120 may include a communication circuit capable of wired and/or wireless network communication.
- the EIS graph may be a graph that coordinates the impedances (i.e., EIS data 220) of the battery pack 110 obtained according to frequency into real and imaginary parts.
- the feature point identification unit 130 may identify feature points 210 and 220 in the EIS data 200. In one embodiment, the feature point identification unit 130 may identify two feature points 210 and 220 in the EIS data 200. The first feature point among the feature points may be determined based on the size of the real part of the impedance of the battery pack 110 in the EIS data 200.
- the first feature point may represent the impedance 210 having the smallest real part in the EIS data 200 or the impedance within a preset range from the impedance 210 having the smallest real part.
- the preset range can be set and changed in various ways considering the allowable error of EIS data, etc.
- the second feature point among the feature points may be determined based on the size of the imaginary part of the impedance of the battery pack 110 in the EIS data 200.
- the second feature point may be related to the impedance 220 at the minimum point in the EIS data 200.
- the second feature point among the feature points may be related to points where Warburg impedance exists in the EIS data 200.
- the second feature point is the impedance of the point with the largest imaginary impedance value among the frequency of the point where the Warburg impedance appears and the frequency region corresponding to the area where the frequency is smaller than the frequency 220 where the Warburg impedance appears, or It may correspond to the impedance of a point located within a preset range from the largest point.
- the second feature point is the frequency region where the Warburg impedance appears (220) and the frequency region corresponding to the region where the frequency is smaller than the frequency (220) where the Warburg impedance appears, the absolute value of the magnitude of the imaginary part impedance is the smallest. It may correspond to the impedance of a point or the impedance of a point located within a preset range from the smallest point.
- the preset range can be set and changed in various ways considering the allowable error of EIS data, etc.
- the resistance parameter calculator 140 may calculate the resistance parameter of the battery pack 110 based on the characteristic points 210 and 220.
- the resistance parameter 230 may be determined based on a value obtained by subtracting the real part value of the first feature point 210 from the real part value of the second feature point 220.
- the resistance parameter may be a value obtained by subtracting the real part value of the first feature point 210 from the real part value of the second feature point 220, or the real part value of the second feature point 220 minus the real part value of the first feature point (220). 210) can be determined based on various methods, such as rounding or approximating the value by subtracting the real part value.
- the SOH determination unit 150 determines the temperature of the battery pack 110 according to the resistance parameter 230 in the relationship data 160 between the temperature at which the EIS data 200 is obtained, the resistance parameter 230, and the SOH. SOH can be determined.
- the temperature may be the temperature at the time of acquiring the EIS data 200 of the battery pack 110.
- the temperature may be acquired by a temperature sensor (not shown) of the SOH prediction device 100 or a temperature sensor (not shown) of the battery pack 110.
- relationship data 160 may be structured as shown in Table 1 below.
- entries divided by temperature and SOH may represent the resistance parameter 230.
- the resistance parameter has R ct10,1 .
- the 1st SOH may be 100.5865% and the Nth SOH may be 97.338%.
- N may be an integer of 2 or more.
- the SOH determination unit 150 refers to the relationship data 160 as shown in Table 1.
- the header value indicating the SOH i.e., the first SOH may be determined as the SOH of the battery pack 110.
- the temperature range of the relationship data 160 can be set to include various ranges other than 10 degrees to 45 degrees, and the interval between temperatures can also be various intervals other than 1 degree. It can be set to have.
- the SOH prediction device 100 can predict the SOH of the battery pack 110 according to the resistance parameter without collecting the EIS data 200 at all temperatures.
- relationship data generator 170 generates the relationship data 160.
- the relationship data generator 170 may acquire the first EIS data of the reference battery pack at a specified SOC, a specified SOH, and a specified first temperature under a specified time condition.
- the reference battery pack may be the same type of battery pack as the battery pack 110.
- the designated time condition may be an idle time condition of the reference battery pack or a condition in which the reference battery pack is in an open state, but is not limited to this example.
- the relationship data generator 170 may calculate resistance parameters at different temperatures based on the first EIS data.
- graph 310 may represent a temperature-resistance parameter graph based on first EIS data.
- the relationship data generator 170 may generate formula candidates indicating the tendency of the first EIS data.
- the relationship data generator 170 may generate equation candidates representing a temperature-resistance parameter graph based on the first EIS data.
- the formula candidates are a first formula representing the relationship between the reciprocal of temperature and the resistance parameter, a second formula representing the relationship between the second-order polynomial for temperature and the resistance parameter, and a second formula representing the relationship between the third-order polynomial for temperature and the resistance parameter. It may include a third equation representing the relationship between the logarithmic value of the reciprocal of the temperature and the reciprocal of the square root of the resistance parameter.
- the graph 410 is a graph according to the first formula
- the graph 430 is a graph according to the second formula
- the graph 450 is a graph according to the third formula
- the graph ( 470) may be a graph according to the fourth equation.
- candidate formulas are expressions expressing the relationship between an nth order (n is an integer greater than or equal to 2) polynomial about temperature and a resistance parameter, or a formula expressing the relationship between an nth order (n is an integer less than or equal to -1) polynomial about temperature and a resistance parameter. It can contain various formulas, such as formulas representing relationships. Additionally, according to embodiments, n may have the value of a positive integer or a negative integer as well as a rational number or an irrational number.
- formula candidates according to an embodiment disclosed in this document include expressions representing the relationship between the reciprocal of the temperature and the logarithmic value of the reciprocal of the nth square root of the resistance parameter, expressions expressed as exponential functions or logarithmic functions, etc. It may also be included.
- a formula candidate according to an embodiment disclosed in this document may be expressed in various ways as long as it is based on the relationship between temperature and resistance parameters.
- the relationship data generator 170 may predict the resistance parameter of the reference battery pack at second temperatures using equation candidates.
- the first temperatures and the second temperatures may be different from each other.
- the temperature range of the first temperatures may include the temperature range of the second temperatures.
- the first temperatures may be 10, 15, 25, 35, and 45 degrees and the second temperatures may be 20, 30, and 40 degrees.
- the relationship data generator 170 may select a formula with the smallest error among formula candidates through the second EIS data. For example, the relationship data generator 170 may acquire the second EIS data of the reference battery pack at a specified SOC, a specified SOH, and a specified second temperature under a specified time condition. Thereafter, the relationship data generator 170 may calculate resistance parameters at different second temperatures based on the second EIS data. Thereafter, the relationship data generator 170 may compare the resistance parameter calculated at the second temperatures with the resistance parameter predicted using the equation candidates. The relationship data generator 170 may select a formula candidate with the least error based on the comparison result.
- the relationship data generator 170 generates relationship data 160 between the resistance parameters and SOH at the first temperatures and third temperatures different from the second temperatures through a formula with the least error.
- the third temperatures may be temperatures that are not included in the first temperatures and the second temperatures (e.g., temperatures of 11, 12, 13, 14, 41, 42, 43, 44, 45 degrees, etc.) .
- Relationship data 160 acquires the first EIS data and the second EIS data in a situation where at least one of the designated SOC or the designated SOH is different, and based on the obtained first EIS data and second EIS data, Relationship data 160 can be supplemented.
- the relationship data generator 170 generates first EIS data of the battery pack obtained at a specified SOC, a specified SOH, and a specified first temperature under a specified time condition, and under the specified idle time condition, the It may be obtained through comparison between a designated SOC, the designated SOH, and second EIS data of the battery pack obtained at designated second temperatures.
- the above-described feature point identification unit 130, resistance parameter calculation unit 140, SOH determination unit 150, and relationship data generation unit 170 may be implemented with one processor or separate processors.
- the processor may execute software to control at least one other component (eg, hardware or software component) of the SOH prediction device 100 and perform various data processing or calculations.
- the relationship data 160 may be stored in a memory (not shown) (eg, volatile memory and/or non-volatile memory) of the SOH prediction device 100.
- the memory may store data used by at least one component of the SOH prediction device 100.
- data may include software (or instructions related thereto), input data, or output data.
- an instruction when executed by a processor, may cause the SOH prediction device 100 to perform operations defined by the instruction.
- the SOH prediction device 100 may transmit the generated relationship data 160 and/or the predicted SOH of the battery pack 110 to an external party (e.g., a cloud server or user terminal).
- the cloud server may provide a service for providing the predicted SOH of the battery pack 110 to each of a plurality of users.
- the user terminal may include terminals such as a personal computer (PC) and a smartphone.
- FIG. 5 is a flowchart showing a method of operating the SOH prediction device 100 according to the resistance parameter 230 according to an embodiment of the present disclosure.
- the SOH prediction device 100 may acquire EIS data 510 of the battery pack 110.
- the EIS graph may be a graph that coordinates the impedances of the battery pack 110 (i.e., EIS data 220) obtained according to frequency into real and imaginary parts.
- the SOH prediction device 100 may identify feature points 210 and 220 in the EIS data 200.
- the first feature point among the feature points may be determined based on the size of the real part of the impedance of the battery pack 110 in the EIS data 200.
- the first feature point may represent an impedance 210 having the smallest real part of the impedance of the battery pack 110 in the EIS data 200 or an impedance within a preset range from the impedance 210 having the smallest real part. there is.
- the preset range can be set and changed in various ways considering the allowable error of EIS data, etc.
- the second feature point among the feature points may be determined based on the size of the imaginary part of the impedance of the battery pack 110 in the EIS data 200.
- the second feature point may be related to the impedance 220 at the minimum point in the EIS data 200.
- the second feature point may be related to points where Warburg impedance exists in the EIS data 200.
- the second feature point is the impedance of the point with the largest imaginary impedance value among the frequency of the point where the Warburg impedance appears and the frequency region corresponding to the area where the frequency is smaller than the frequency 220 where the Warburg impedance appears, or It may correspond to the impedance of a point located within a preset range from the largest point.
- the second feature point is the frequency region where the Warburg impedance appears (220) and the frequency region corresponding to the region where the frequency is smaller than the frequency (220) where the Warburg impedance appears, the absolute value of the magnitude of the imaginary part impedance is the smallest. It may correspond to the impedance of a point or the impedance of a point located within a preset range from the smallest point.
- the SOH prediction device 100 may calculate the resistance parameter 230 of the battery pack based on the feature points 210 and 220.
- the resistance parameter 230 may be determined based on a value obtained by subtracting the real part value of the first feature point 210 from the real part value of the second feature point 220.
- the resistance parameter may be a value obtained by subtracting the real part value of the first feature point 210 from the real part value of the second feature point 220, or the real part value of the second feature point 220 minus the real part value of the first feature point (220). 210) can be determined based on various methods, such as rounding or approximating the value by subtracting the real part value.
- the SOH prediction device 100 may determine the SOH of the battery pack 110 according to the temperature and resistance parameters 230. In one embodiment, the SOH prediction device 100 determines the temperature of the battery pack 110 according to the resistance parameter 230 in the relationship data 160 between the temperature at which the EIS data 200 is obtained, the resistance parameter 230, and the SOH. SOH can be determined.
- the temperature may be the temperature at the time of acquiring the EIS data 200 of the battery pack 110.
- FIG. 6 is a flowchart showing a method of operating the SOH prediction device 100 according to the resistance parameter 230 according to an embodiment of the present disclosure.
- the SOH prediction device 100 may acquire first EIS data and second EIS data.
- the SOH prediction device 100 may acquire first EIS data of a reference battery pack at a specified SOC, a specified SOH, and specified first temperatures under a specified time condition.
- the designated time condition may be an idle time condition of the reference battery pack or a condition in which the reference battery pack is in an open state, but is not limited to this example.
- the relationship data generator 170 may acquire the second EIS data of the reference battery pack at the designated SOC, designated SOH, and designated second temperatures under designated time conditions.
- the reference battery pack may be the same type of battery pack as the battery pack 110.
- the temperature range of the first temperatures may include the temperature range of the second temperatures.
- the first temperatures may be 10, 15, 25, 35, and 45 degrees and the second temperatures may be 20, 30, and 40 degrees.
- the SOH prediction device 100 may generate equation candidates indicating the tendency of the first EIS data.
- the formula candidates are a first formula representing the relationship between the reciprocal of temperature and the resistance parameter, a second formula representing the relationship between the second-order polynomial for temperature and the resistance parameter, and a second formula representing the relationship between the third-order polynomial for temperature and the resistance parameter. It may include a third equation representing the relationship between the logarithmic value of the reciprocal of the temperature and the reciprocal of the square root of the resistance parameter.
- candidate formulas are expressions expressing the relationship between an nth order (n is an integer greater than or equal to 2) polynomial about temperature and a resistance parameter, or a formula expressing the relationship between an nth order (n is an integer less than or equal to -1) polynomial about temperature and a resistance parameter. It can contain various formulas, such as formulas representing relationships. Additionally, according to embodiments, n may have the value of a positive integer or a negative integer as well as a rational number or an irrational number.
- formula candidates according to an embodiment disclosed in this document include expressions representing the relationship between the reciprocal of the temperature and the logarithmic value of the reciprocal of the nth square root of the resistance parameter, expressions expressed as exponential functions or logarithmic functions, etc. It may also be included.
- a formula candidate according to an embodiment disclosed in this document may be expressed in various ways as long as it is based on the relationship between temperature and resistance parameters.
- the SOH prediction device 100 may select a formula with the smallest error among formula candidates through the second EIS data. For example, the SOH prediction device 100 may predict the resistance parameter of the reference battery pack at the second temperatures using equation candidates. Additionally, for example, the SOH prediction device 100 may calculate resistance parameters at different second temperatures based on the second EIS data. Thereafter, the SOH prediction device 100 may compare the resistance parameter calculated at the second temperatures with the resistance parameter predicted using the equation candidates. The SOH prediction device 100 may select a formula candidate with the least error based on the comparison result.
- the SOH prediction device 100 may generate relationship data between the resistance parameter and SOH through a formula with the smallest error.
- the SOH prediction device 100 may generate relationship data 160 between the resistance parameter and SOH at the first temperatures and third temperatures different from the second temperatures through a formula with the smallest error.
- the third temperatures may be temperatures that are not included in the first temperatures and the second temperatures (e.g., temperatures of 11, 12, 13, 14, 41, 42, 43, 44, 45 degrees, etc.) .
- the SOH prediction device 100 acquires the first EIS data and the second EIS data in a situation where at least one of the designated SOC or the designated SOH is different, and establishes a relationship based on the obtained first EIS data and the second EIS data.
- Data 160 can be supplemented.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
Description
| 온도 | 제1 SOH | ... | 제N SOH |
| 10 | Rct10,1 | ... | Rct10,N |
| 11 | Rct11,1 | ... | Rct11,N |
| 12 | Rct12,1 | ... | Rct12,N |
| ... | ... | ... | ... |
| 44 | Rct44,1 | ... | Rct44,N |
| 45 | Rct45,1 | ... | Rct45,N |
Claims (18)
- 배터리의 EIS(electrochemical impedance spectroscopy) 데이터를 획득하는 EIS 데이터 획득부,상기 EIS 데이터에서 특징점들을 식별하는 특징점 식별부,상기 특징점들에 기초하여 상기 배터리의 저항 파라미터를 계산하는 저항 파라미터 계산부, 및상기 EIS 데이터가 획득된 온도, 상기 저항 파라미터 및 상기 SOH 간의 관계 데이터에서, 상기 저항 파라미터에 따른 상기 배터리의 SOH(state of health)를 결정하는 SOH 결정부를 포함하는SOH 예측 장치.
- 청구항 1에 있어서,상기 특징점들 중 제1 특징점은 상기 EIS 데이터의 실수부 크기에 기초하여 결정되는SOH 예측 장치.
- 청구항 2에 있어서,상기 특징점들 중 상기 제1 특징점은 상기 EIS 데이터에서 가장 작은 실수부를 가지는 임피던스 또는 상기 가장 작은 실수부를 가지는 임피던스로부터 기 설정된 범위 내의 임피던스를 나타내는SOH 예측 장치.
- 청구항 1에 있어서,상기 특징점들 중 제2 특징점은 상기 EIS 데이터의 허수부 크기에 기초하여 결정되는SOH 예측 장치.
- 청구항 4에 있어서,상기 특징점들 중 제2 특징점은 상기 EIS 데이터에서 와버그(Warburg) 임피던스가 나타나는 주파수 및 상기 와버그 임피던스가 나타나는 주파수보다 작은 주파수 영역 중 허수부 임피던스의 크기의 절대값이 가장 작은 지점의 임피던스 또는 상기 절대 값이 가장 작은 지점으로부터 기 설정된 범위 내의 임피던스를 나타내는SOH 예측 장치.
- 청구항 1에 있어서,상기 저항 파라미터는 상기 특징점들 중 상기 제2 특징점의 실수부 값에서 제1 특징점의 실수부 값을 뺀 값에 기초하여 결정되는SOH 예측 장치.
- 청구항 1에 있어서,상기 관계 데이터는,지정된 시간 조건에서, 지정된 SOC(state of charge), 지정된 SOH, 및 지정된 제1 온도들에서 획득되는 기준 배터리의 제1 EIS 데이터, 상기 지정된 시간 조건에서, 상기 지정된 SOC, 상기 지정된 SOH, 및 지정된 제2 온도들에서 획득되는 상기 기준 배터리의 제2 EIS 데이터 간의 비교를 통해 획득되고,상기 제1 온도들과 상기 제2 온도들은 서로 다른SOH 예측 장치.
- 청구항 7에 있어서,상기 제1 EIS 데이터의 경향성을 나타내는 수식 후보들을 생성하고, 상기 제2 EIS 데이터를 통해 상기 수식 후보들 중 오차가 가장 적은 수식을 선택하고, 상기 오차가 가장 적은 수식을 통해 상기 제1 온도들 및 상기 제2 온도들과 다른 제3 온도들에서의 상기 저항 파라미터 및 상기 SOH 간의 관계 데이터를 생성하는 관계 데이터 생성부를 포함하는,SOH 예측 장치.
- 청구항 7에 있어서,상기 제1 온도들의 온도 범위는 상기 제2 온도들의 온도 범위를 포함하는SOH 예측 장치.
- 적어도 하나의 배터리 셀을 포함하는 배터리의 EIS(electrochemical impedance spectroscopy) 데이터를 획득하는 동작,상기 EIS 데이터에서 특징점들을 식별하는 동작,상기 특징점들에 기초하여 상기 배터리의 저항 파라미터를 계산하는 동작, 및상기 EIS 데이터가 획득된 온도, 상기 저항 파라미터 및 상기 SOH 간의 관계 데이터에서, 상기 저항 파라미터에 따른 상기 배터리의 SOH(state of health)를 결정하는 동작을 포함하는SOH 예측 장치의 동작 방법.
- 청구항 10에 있어서,상기 특징점들 중 제1 특징점은 상기 EIS 데이터의 실수부 크기에 기초하여 결정되는SOH 예측 장치의 동작 방법.
- 청구항 11에 있어서,상기 특징점들 중 상기 제1 특징점은 상기 EIS 데이터에서 가장 작은 실수부를 가지는 임피던스 또는 상기 가장 작은 실수부를 가지는 임피던스로부터 기 설정된 범위 내의 임피던스를 나타내는SOH 예측 장치의 동작 방법.
- 청구항 10에 있어서,상기 특징점들 중 제2 특징점은 상기 EIS 데이터의 허수부 크기에 기초하여 결정되는SOH 예측 장치의 동작 방법.
- 청구항 13에 있어서,상기 특징점들 중 상기 제2 특징점은 상기 EIS 데이터에서 와버그(Warburg) 임피던스가 나타나는 주파수 및 상기 와버그 임피던스가 나타나는 주파수보다 작은 주파수 영역 중 허수부 임피던스의 크기의 절대값이 가장 작은 지점의 임피던스 또는 상기 절대 값이 가장 작은 지점으로부터 기 설정된 범위 내의 임피던스를 나타내는SOH 예측 장치의 동작 방법.
- 청구항 10에 있어서,상기 저항 파라미터는 상기 특징점들 중 제2 특징점의 실수부 값에서 제1 특징점의 실수부 값을 뺀 값에 기초하여 결정되는SOH 예측 장치의 동작 방법.
- 청구항 10에 있어서,상기 관계 데이터는,지정된 시간 조건에서, 지정된 SOC(state of charge), 지정된 SOH, 및 지정된 제1 온도들에서 획득되는 기준 배터리의 제1 EIS 데이터, 상기 지정된 시간 조건에서, 상기 지정된 SOC, 상기 지정된 SOH, 및 지정된 제2 온도들에서 획득되는 상기 기준 배터리의 제2 EIS 데이터 간의 비교를 통해 획득되고,상기 제1 온도들과 상기 제2 온도들은 서로 다른SOH 예측 장치의 동작 방법.
- 청구항 16에 있어서,상기 제1 EIS 데이터의 경향성을 나타내는 수식 후보들을 생성하는 동작,상기 제2 EIS 데이터를 통해 상기 수식 후보들 중 오차가 가장 적은 수식을 선택하는 동작, 및상기 오차가 가장 적은 수식을 통해 상기 제1 온도들 및 상기 제2 온도들과 다른 제3 온도들에서의 상기 저항 파라미터 및 상기 SOH 간의 관계 데이터를 생성하는 동작을 더 포함하는SOH 예측 장치의 동작 방법.
- 청구항 16에 있어서,상기 제1 온도들의 온도 범위는 상기 제2 온도들의 온도 범위를 포함하는SOH 예측 장치의 동작 방법.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380080663.6A CN120239824A (zh) | 2022-11-25 | 2023-11-21 | Soh预测装置及其操作方法 |
| EP23895000.0A EP4617692A4 (en) | 2022-11-25 | 2023-11-21 | SOH PREDICTION DEVICE AND ITS OPERATING PROCESS |
| JP2025530434A JP2025537919A (ja) | 2022-11-25 | 2023-11-21 | Soh予測装置及びその動作方法 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20220160930 | 2022-11-25 | ||
| KR10-2022-0160930 | 2022-11-25 | ||
| KR1020230160489A KR102909740B1 (ko) | 2022-11-25 | 2023-11-20 | Soh 예측 장치 및 이의 동작 방법 |
| KR10-2023-0160489 | 2023-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024112072A1 true WO2024112072A1 (ko) | 2024-05-30 |
Family
ID=91196206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2023/018799 Ceased WO2024112072A1 (ko) | 2022-11-25 | 2023-11-21 | Soh 예측 장치 및 이의 동작 방법 |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4617692A4 (ko) |
| JP (1) | JP2025537919A (ko) |
| CN (1) | CN120239824A (ko) |
| WO (1) | WO2024112072A1 (ko) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736085A (zh) * | 2020-07-07 | 2020-10-02 | 中国检验检疫科学研究院 | 一种基于电化学阻抗谱的锂离子电池健康状态估计方法 |
| CN113138340A (zh) * | 2020-01-17 | 2021-07-20 | 华为技术有限公司 | 电池等效电路模型的建立方法、健康状态估算方法及装置 |
| KR20210103772A (ko) * | 2020-02-14 | 2021-08-24 | 주식회사 엘지화학 | 전지의 전해액 함침도 검사 방법 |
| KR20220043070A (ko) * | 2019-04-11 | 2022-04-05 | 어드밴스드 메저먼트 테크놀로지 인크 | 배터리 모니터링 및 테스팅 시스템 및 그 방법들 |
| KR20220093842A (ko) * | 2020-12-28 | 2022-07-05 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 방법 |
| KR20220160930A (ko) | 2021-05-28 | 2022-12-06 | 주식회사 플레이두두 | 직교 또는 교차하는 부재의 연결용 유닛 클램프 어셈블리를 이용한 스카이워크 |
| KR20230160489A (ko) | 2022-05-17 | 2023-11-24 | 경북대학교 산학협력단 | 유냉식 제동 시스템 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3812783B1 (en) * | 2019-10-23 | 2024-11-27 | Novum engineerING GmbH | Estimating a battery state from electrical impedance measurements using convolutional neural network means |
-
2023
- 2023-11-21 WO PCT/KR2023/018799 patent/WO2024112072A1/ko not_active Ceased
- 2023-11-21 CN CN202380080663.6A patent/CN120239824A/zh active Pending
- 2023-11-21 JP JP2025530434A patent/JP2025537919A/ja active Pending
- 2023-11-21 EP EP23895000.0A patent/EP4617692A4/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220043070A (ko) * | 2019-04-11 | 2022-04-05 | 어드밴스드 메저먼트 테크놀로지 인크 | 배터리 모니터링 및 테스팅 시스템 및 그 방법들 |
| CN113138340A (zh) * | 2020-01-17 | 2021-07-20 | 华为技术有限公司 | 电池等效电路模型的建立方法、健康状态估算方法及装置 |
| KR20210103772A (ko) * | 2020-02-14 | 2021-08-24 | 주식회사 엘지화학 | 전지의 전해액 함침도 검사 방법 |
| CN111736085A (zh) * | 2020-07-07 | 2020-10-02 | 中国检验检疫科学研究院 | 一种基于电化学阻抗谱的锂离子电池健康状态估计方法 |
| KR20220093842A (ko) * | 2020-12-28 | 2022-07-05 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 방법 |
| KR20220160930A (ko) | 2021-05-28 | 2022-12-06 | 주식회사 플레이두두 | 직교 또는 교차하는 부재의 연결용 유닛 클램프 어셈블리를 이용한 스카이워크 |
| KR20230160489A (ko) | 2022-05-17 | 2023-11-24 | 경북대학교 산학협력단 | 유냉식 제동 시스템 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4617692A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2025537919A (ja) | 2025-11-20 |
| EP4617692A1 (en) | 2025-09-17 |
| CN120239824A (zh) | 2025-07-01 |
| EP4617692A4 (en) | 2026-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021006566A1 (ko) | 배터리 셀 진단 장치 및 방법 | |
| WO2022092621A1 (ko) | 배터리 진단 장치 및 방법 | |
| WO2023136512A1 (ko) | 배터리 충전 심도 산출 장치 및 그것의 동작 방법 | |
| WO2022065635A1 (ko) | 배터리 장치 및 배터리 상태 추정 방법 | |
| WO2023038262A1 (ko) | 배터리 셀의 용량 산출 장치 및 방법 | |
| WO2024136310A1 (ko) | 배터리의 가스 발생량 예측 장치 및 이의 동작 방법 | |
| WO2024258009A1 (ko) | 배터리 진단 장치 및 방법 | |
| WO2021125674A1 (ko) | 배터리 진단 장치 및 방법 | |
| WO2024112072A1 (ko) | Soh 예측 장치 및 이의 동작 방법 | |
| WO2024155103A1 (ko) | 배터리 온도 추정 장치 및 이의 동작 방법 | |
| WO2024136208A1 (ko) | 배터리 진단 장치 및 그의 동작 방법 | |
| WO2024232502A1 (ko) | 배터리 관리 장치 및 그것의 동작 방법 | |
| WO2023106583A1 (ko) | 충전 프로토콜 검사 장치 및 그것의 동작 방법 | |
| WO2025100761A1 (ko) | Soh 예측 장치 및 그것의 동작 방법 | |
| WO2023063630A1 (ko) | 배터리 관리 장치 및 그것의 동작 방법 | |
| KR20240078347A (ko) | Soh 예측 장치 및 이의 동작 방법 | |
| WO2024106706A1 (ko) | 배터리의 퇴화 검사 장치 및 이의 동작 방법 | |
| WO2024080507A1 (ko) | 배터리 히팅 장치 및 그의 동작 방법 | |
| WO2024242274A1 (ko) | 배터리를 위한 등가 회로 모델의 파라미터 추정 장치 및 그의 동작 방법 | |
| WO2025178338A1 (ko) | 배터리 진단 장치 및 그 방법 | |
| WO2025221126A1 (ko) | 배터리 진단 장치 및 그것의 동작 방법 | |
| WO2026029394A1 (ko) | 배터리 진단 장치 및 그 방법 | |
| WO2025058276A1 (ko) | 배터리 진단 장치 및 이의 동작 방법 | |
| WO2025033845A1 (ko) | 배터리 셀 검사 장치 및 이의 동작 방법 | |
| WO2026054374A1 (ko) | 배터리 진단 장치 및 이의 동작 방법 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23895000 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202380080663.6 Country of ref document: CN |
|
| ENP | Entry into the national phase |
Ref document number: 2025530434 Country of ref document: JP Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2501003375 Country of ref document: TH Ref document number: 2025530434 Country of ref document: JP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202517053484 Country of ref document: IN |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2023895000 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWP | Wipo information: published in national office |
Ref document number: 202517053484 Country of ref document: IN |
|
| WWP | Wipo information: published in national office |
Ref document number: 202380080663.6 Country of ref document: CN |
|
| ENP | Entry into the national phase |
Ref document number: 2023895000 Country of ref document: EP Effective date: 20250625 |
|
| WWP | Wipo information: published in national office |
Ref document number: 2023895000 Country of ref document: EP |