WO2023022431A1 - Système d'extraction d'entropie de batterie par mesure calorimétrique à l'aide d'un capteur de flux de chaleur flexible - Google Patents

Système d'extraction d'entropie de batterie par mesure calorimétrique à l'aide d'un capteur de flux de chaleur flexible Download PDF

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Publication number
WO2023022431A1
WO2023022431A1 PCT/KR2022/011969 KR2022011969W WO2023022431A1 WO 2023022431 A1 WO2023022431 A1 WO 2023022431A1 KR 2022011969 W KR2022011969 W KR 2022011969W WO 2023022431 A1 WO2023022431 A1 WO 2023022431A1
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WO
WIPO (PCT)
Prior art keywords
entropy
battery cell
extraction system
ted
battery
Prior art date
Application number
PCT/KR2022/011969
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English (en)
Korean (ko)
Inventor
이상국
압둘모이즈아마드
기욤테네시
Original Assignee
한국과학기술원
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Application filed by 한국과학기술원 filed Critical 한국과학기술원
Publication of WO2023022431A1 publication Critical patent/WO2023022431A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644—Constructional arrangements
    • G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a system for extracting entropy of a battery, and more particularly, to a system for extracting entropy of a battery through calorimetry using a flexible heat flow sensor.
  • thermodynamic state functions As one of the thermodynamic state functions, entropy is used to describe energy that cannot be converted into work in a thermodynamic system, that is, is not useful.
  • the degree of entropy change can be used as an indicator of battery capacity reduction and safety.
  • a Peltier device mounted on the surface of the battery and serving as a temperature sensor is used instead of an expensive calorimeter in the prior art to measure temperature change (heat flow) due to heat generated in the battery.
  • temperature change heat flow
  • FIGS. 1 and 2 it is difficult to measure the heat flow on the surface of the battery cell to which the Peltier element is not coupled.
  • the battery cell includes a circular or curved surface or is formed of a curved surface, and a part (surface) that does not adhere between the battery cell and the temperature sensor is generated, making it difficult to accurately measure the heat flow in the part where the battery cell and the temperature sensor do not adhere. problems will arise.
  • the method of extracting entropy using a conventional Peltier element accurately measures the heat flow in the case of the surface of a battery cell to which the Peltier element is not coupled, or when the battery cell includes a circular or curved surface or is formed of a curved surface.
  • the accuracy of the value of the extracted entropy is reduced.
  • the present invention has been made to solve the above problems, and an object of the present invention is to more accurately extract the value of entropy by using a heat flow sensor formed to have a flexible characteristic so as to cover all surfaces of a battery cell. It is to provide a battery entropy extraction system that can.
  • a battery cell entropy extraction system in an extraction system for calculating entropy based on temperature and voltage information, is formed to have a flexible characteristic, and all surfaces of the battery cell It is provided to cover the TED (Thermo electric device) that serves as a heat flow sensor; includes.
  • TED Thermo electric device
  • TED measures the temperature difference between the battery cell and the surrounding environment of the battery cell, extracts the entropy value from the heat generated or absorbed by the chemicals inside the battery cell, and calculates the heat generated by the ohmic effect from the entropic heat. can be distinguished.
  • the extraction system may continuously extract an entropy value regardless of the mode change or may extract entropy values for each mode.
  • the extraction system calculates the entropy without correcting the measured temperature when the surrounding environment of the TED coupled to cover all surfaces of the battery cell is an isothermal environment, but combines to cover all surfaces of the battery cell If the surrounding environment of the TED is not an isothermal environment, the measured temperature may be calibrated and entropy may be calculated based on the calibration result.
  • the extraction system may further include a waterproof layer formed to have a predetermined thickness and provided to cover all surfaces of the TED surrounding all surfaces of the battery cells.
  • the extraction system the voltage measuring unit for obtaining the voltage information; and a processor that calculates entropy based on the temperature and voltage information.
  • an entropy value can be more accurately extracted by using a heat flow sensor formed to have a flexible characteristic so as to cover all surfaces of a battery cell.
  • FIG. 1 is a view showing a state in which a conventional Peltier element formed in a flat shape is coupled to a battery cell;
  • FIG. 2 is a diagram showing a portion where heat flow is measured and a portion where heat flow is not measured through the Peltier element shown in FIG. 1;
  • FIG. 3 is a diagram provided to explain the configuration of a battery entropy extraction system according to an embodiment of the present invention
  • FIG. 4 is a diagram provided in TED's description of the battery entropy extraction system shown in FIG. 3;
  • FIG. 5 is a diagram showing a state in which TEDs of the battery entropy extraction system shown in FIG. 3 are coupled to battery cells;
  • FIG. 6 is a diagram showing a portion where heat flow is measured and a portion where heat flow is not measured through the TED shown in FIG. 5;
  • FIG. 7 is a diagram illustrating a state in which a waterproof layer is formed on the TED shown in FIG. 5;
  • FIG. 8 is a diagram illustrating a circuit of a battery cell surrounded by TEDs shown in FIG. 5 .
  • FIG. 1 is a view showing a state in which a conventional Peltier element formed in a flat shape is coupled to a battery cell 10
  • FIG. 2 is a portion where heat flow is measured through the Peltier element shown in FIG. It is a drawing showing the parts that cannot be measured.
  • the Peltier element is coupled to two surfaces having the largest area among the six surfaces of the battery cell 10 formed in a hexahedral shape, so that 60 to 80% of the area of the entire battery cell 10 can be covered. there is.
  • the Peltier element in order to more accurately extract the entropy value, the Peltier element must be coupled to all surfaces of the battery cell 10, but the conventional Peltier element can only be coupled to a flat surface, and the shape limiting condition of the battery cell is There is a lot of demand.
  • the problem of not being able to measure the heat flow on all surfaces of the battery cell may occur due to geometric mismatch between the shape of the battery cell 10 and the Peltier element.
  • the small surface (four sides to which the Peltier element is not coupled) of the battery cell 10 illustrated in FIG. 2 is such that the Peltier element cannot cover the entire surface due to geometric problems such as size or shape.
  • FIG. 3 is a diagram provided to explain the configuration of a battery entropy extraction system according to an embodiment of the present invention
  • FIG. 4 is a diagram provided to explain the TED (200) of the battery entropy extraction system shown in FIG. 3
  • FIG. 5 is a view showing the TED 200 of the battery entropy extraction system shown in FIG. 3 coupled to the battery cell 10
  • FIG. 6 shows the TED 200 shown in FIG. 7 is a view illustrating the formation of the waterproof layer 210 in the TED 200 shown in FIG. 5
  • FIG. A circuit of the battery cell 10 surrounded by the TED 200 shown in FIG. 5 is an exemplified diagram.
  • the battery entropy extraction system (hereinafter, referred to collectively as an 'extraction system') according to the present embodiment uses a thermal flow sensor formed to have a flexible characteristic so as to cover all surfaces of the battery cell 10, more accurately The value of entropy can be extracted.
  • the extraction system includes a power supply 100 that supplies power to the battery cell 10, a TED 200 that serves as a heat flow sensor for measuring the heat flow of the battery, and a voltage of the battery cell 10. and a processor 400 that calculates entropy based on (heat flow) temperature and voltage information obtained through the voltage measurement unit 300 and the TED 200 and the voltage measurement unit 300.
  • the processor 400 may perform a signal processing process for filtering noise included in data about temperature and voltage information.
  • the TED 200 may be formed to have a flexible characteristic and cover all surfaces of the battery cell 10 .
  • the TED (200) is formed to have a flexible characteristic, even when the battery cell 10 is formed flat or formed in a cylindrical (cylindrical shape), it can cover all surfaces of the battery cell.
  • the TED 200 is maximally coupled to the surface of the portion where heat is discharged to the outside through the electric cable, thereby minimizing heat loss.
  • the TED 200 has the battery cell 10 disposed therein, and one or two TEDs 200 are overlapped and heat-sealed on the outside of the battery cell 10, thereby forming a battery.
  • the surface of the cell 10 may not be exposed to the outside.
  • the TED 200 is formed to have a predetermined thickness, as illustrated in FIG. 7, to prevent interference with the heat flow measurement operation due to humidity, and covers all surfaces of the battery cell 10.
  • a waterproof layer 210 may be provided to cover all surfaces of the TED 200 that surrounds (or surrounds and heat-seals all surfaces of the battery cell 10 ).
  • the waterproof layer 210 may be formed of a material having thermal conductivity and waterproof characteristics.
  • the extraction system may continuously extract an entropy value regardless of the mode change or may extract an entropy value for each mode.
  • the temperature of the battery cell 10 may rapidly rise due to the power supplied through the power supply unit 100, and at this time, when the temperature of the battery cell 10 matches the ambient temperature Until, heat flow occurs.
  • Entropy heat can be obtained by removing ohmic heat from the entire measured heat, so TED (200) measures the temperature difference between the battery cell 10 and the surrounding environment of the battery cell 10, and the inside of the battery cell 10 By extracting the entropy value from the heat produced or absorbed by the chemical substance of the ohmic effect, it is possible to distinguish the heat generated by the ohmic effect from the heat of entropy.
  • the extraction system calculates entropy without correcting the measured temperature when the surrounding environment of the TED (200) coupled to cover all surfaces of the battery cell 10 is an isothermal environment (thermal equilibrium state) .
  • the surrounding environment of the TED 200 coupled to cover all surfaces of the battery cell 10 is not an isothermal environment, the measured temperature is corrected through the processor 400, and the entropy based on the correction result can be calculated.
  • the extraction system corrects the measured temperature and voltage information through the processor 400 and calculates the entropy based on the correction result.
  • the present extraction system can more accurately extract the value of entropy.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un système d'extraction d'entropie de batterie par mesure calorimétrique à l'aide d'un capteur de flux de chaleur flexible. Le système d'extraction d'entropie de cellule de batterie selon un mode de réalisation de la présente invention calcule une entropie en fonction d'informations de température et de tension, et comprend un dispositif thermoélectrique (TED) qui est flexible, peut recouvrir chaque surface d'une cellule de batterie, et sert de capteur de flux de chaleur. Ainsi, des valeurs d'entropie peuvent être extraites plus précisément à l'aide du capteur de flux de chaleur flexible qui peut recouvrir chaque surface d'une cellule de batterie.
PCT/KR2022/011969 2021-08-18 2022-08-11 Système d'extraction d'entropie de batterie par mesure calorimétrique à l'aide d'un capteur de flux de chaleur flexible WO2023022431A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020210108453A KR20230026640A (ko) 2021-08-18 2021-08-18 플렉시블 열류 센서를 이용한 열량 측정을 통한 배터리 엔트로피 추출 시스템
KR10-2021-0108453 2021-08-18

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WO2023022431A1 true WO2023022431A1 (fr) 2023-02-23

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100006491U (ko) * 2008-12-17 2010-06-25 주식회사 엘지화학 전지팩용 온도 센서
US20180047485A1 (en) * 2016-08-15 2018-02-15 Littelfuse, Inc. Flexible positive temperature coefficient device with battery management system
US20190195958A1 (en) * 2016-08-05 2019-06-27 Gs Yuasa International Ltd. Energy storage device state estimation device and energy storage device state estimation method
KR20200049123A (ko) * 2018-10-31 2020-05-08 에스케이이노베이션 주식회사 온도측정부를 갖는 배터리 모듈
KR20210056276A (ko) * 2019-11-08 2021-05-18 한국과학기술원 전기적 신호 입력에 따른 발열 응답을 이용한 전기화학 소자의 엔트로피 추출 방법 및 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100006491U (ko) * 2008-12-17 2010-06-25 주식회사 엘지화학 전지팩용 온도 센서
US20190195958A1 (en) * 2016-08-05 2019-06-27 Gs Yuasa International Ltd. Energy storage device state estimation device and energy storage device state estimation method
US20180047485A1 (en) * 2016-08-15 2018-02-15 Littelfuse, Inc. Flexible positive temperature coefficient device with battery management system
KR20200049123A (ko) * 2018-10-31 2020-05-08 에스케이이노베이션 주식회사 온도측정부를 갖는 배터리 모듈
KR20210056276A (ko) * 2019-11-08 2021-05-18 한국과학기술원 전기적 신호 입력에 따른 발열 응답을 이용한 전기화학 소자의 엔트로피 추출 방법 및 장치

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