WO2023167394A1 - Procédé d'estimation de l'état d'une batterie - Google Patents

Procédé d'estimation de l'état d'une batterie Download PDF

Info

Publication number
WO2023167394A1
WO2023167394A1 PCT/KR2022/019495 KR2022019495W WO2023167394A1 WO 2023167394 A1 WO2023167394 A1 WO 2023167394A1 KR 2022019495 W KR2022019495 W KR 2022019495W WO 2023167394 A1 WO2023167394 A1 WO 2023167394A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
pulse current
soc
current
charging
Prior art date
Application number
PCT/KR2022/019495
Other languages
English (en)
Korean (ko)
Inventor
홍영진
이영재
주유진
최성호
명석한
김두리
정지현
김태훈
Original Assignee
주식회사 민테크
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 주식회사 민테크 filed Critical 주식회사 민테크
Publication of WO2023167394A1 publication Critical patent/WO2023167394A1/fr

Links

Images

Classifications

    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • 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
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health

Definitions

  • the present invention relates to a method and apparatus capable of estimating the state of a battery.
  • Batteries are used as power sources for mobile devices and electric vehicles, and demand for them is explosively increasing with the recent popularization of electric vehicles.
  • demand for methods for recycling/reusing batteries or stably using batteries for a long period of time is increasing as demand for medium and large-sized batteries with high unit prices increases.
  • Accurately diagnosing the state of the battery is important in order to re-use the battery or to use the battery stably and for a long time. If the state of the battery can be accurately diagnosed, the direction can be set to efficiently reuse the battery, and the lifespan of the battery can be improved by preventing overcharging or overdischarging during charging and discharging of the battery. .
  • OCV open circuit voltage
  • SOC state of charge
  • OCV is the voltage of the battery measured in a state in which the circuit is open, and means the voltage of the battery measured in a state in which the current applied to the battery is zero.
  • the OCV of the battery may simply mean the voltage measured in the open circuit state or the voltage measured in the electrochemically equilibrated state after a long time in the circuit open state.
  • the voltage measured in the state can be defined as Nernst OCV (Nernst OCV).
  • Nernst OCV is a voltage measured in an electrochemical equilibrium state, it can be considered to provide information about the thermodynamic state of the battery.
  • a method of estimating the Nernst OCV of a battery is a method of estimating using a voltage value that converges when the battery is stabilized for a certain period of time (eg, 2 hours or more) in a state where no external electrical stimulation is applied.
  • a certain period of time e.g. 2 hours or more
  • the internal state of the battery must reach electrochemical equilibrium in order to estimate the Nernst OCV in this way, there is a disadvantage in that a lot of cost and time are incurred.
  • the problem to be solved by the present invention is to provide a method for quickly and accurately estimating the Nernst OCV of a battery within minutes.
  • An object to be solved by the present invention is to provide a method for calculating SOC of a battery based on the estimated Nernst OCV and calculating State of Health (SOH) using the calculated SOC.
  • a battery state estimation method according to an aspect of the present invention
  • a charging current is applied in step (S200), and if the SOC of the battery determined in step (S100) is greater than or equal to the reference SOC, (S200 ) step, the discharge current can be applied.
  • the reference SOC may be at a point between 20% and 80%.
  • At least one charge pulse current and at least one discharge pulse current applied in step (S300) may be applied alternately.
  • the pulse current applied in step (S300) may first be applied with a pulse current having an opposite sign to the current applied in step (S200).
  • the total charge capacity (Ah) by at least one charging pulse current applied in step (S300) and the total discharge capacity (Ah) by at least one discharge pulse current may be equal to each other.
  • the size of the pulse current applied in step (S300) is 0.1 C-rate to 10.0 C-rate, and the time for applying the pulse current may be 0.1 second to 500 seconds.
  • At least one pause step may be inserted between the step of applying at least one charge pulse current and at least one discharge pulse current in step S300.
  • the pause step inserted between the applying of the at least one charge pulse current and the at least one discharge pulse current may be maintained for 0.1 second to 500 seconds, or 0.1 second to 120 seconds.
  • the total time ( ⁇ A ) during which at least one charge pulse current is applied and the total time ( ⁇ B ) during which at least one discharge pulse is applied may be equal to each other in step S300 .
  • the rest step inserted between the applying of the at least one charge pulse current and the at least one discharge pulse current may be maintained for 0.1 ⁇ A to 10 ⁇ A.
  • the average of step (S500) may be calculated by any one or combination of arithmetic average, geometric average, and harmonic average.
  • the step of calculating the SOC of the battery using the estimated Nernst OCV may further be included, and the step of calculating the SOC refers to a reference table corresponding to the estimated Nernst OCV. You can calculate the SOC using a specific formula.
  • the above-described SOC calculation of the battery may be performed multiple times in different charging states of the battery.
  • a step of calculating a capacity lifetime (SOH) based on the calculated SOC of multiple times may be further included (S700).
  • the SOC of the battery is determined, the charging current or the discharging current is applied based on the SOC determination result, at least one charging pulse current and at least one discharging pulse current are applied to the battery, and the charging pulse current is applied.
  • a battery state including a processor that measures the voltage V c changed when current is applied, measures the voltage V d changed when discharge pulse current is applied, and estimates the average value of the V c and V d as Nernst OCV.
  • An estimation device can be provided.
  • a method for calculating the SOC of a battery changed during partial charge and discharge using the Nernst OCV value estimated before and after partial charge and discharge and calculating the capacity life (SOH) of the battery using the calculated SOC change amount is provided.
  • FIG. 1 is a flowchart illustrating a method for estimating a battery state according to an embodiment of the present invention.
  • FIG. 2 shows that the application profiles of the charging pulse current and the discharging pulse current according to an embodiment of the present invention and the total charge/discharge capacity by each pulse current are equal to each other.
  • FIG. 3 is a flowchart of application of charging current and discharging current according to an embodiment of the present invention.
  • FIG. 4 shows an example of a method for estimating a battery state according to an embodiment of the present invention, and is a graph showing a change in voltage when current is applied.
  • Nernst OCV is estimated by the method of the present invention in a module or pack type battery and an error rate with an actual Nernst OCV is calculated.
  • FIG. 6 shows an example of a battery state estimation method according to an embodiment of the present invention, and is a graph showing estimating Nernst OCV and SOC before and after partial discharge at different time points.
  • first or second may be used to describe various components, but these terms should be interpreted only for the purpose of distinguishing one component from another.
  • a first element may be termed a second element, and similarly, a second element may be termed a first element.
  • FIG. 1 is a flowchart illustrating a method for estimating a state of a battery according to an embodiment of the present invention.
  • the battery in the present invention includes a capacitor or a secondary battery that stores power by charging, and a device employing the battery can receive power from the battery as a load.
  • the battery includes a battery pack composed of a plurality of battery modules, at least one battery module in the battery pack, a battery module composed of a plurality of battery cells, at least one battery cell in the battery module, a representative module representing a plurality of battery modules, and a plurality of battery modules. It may include at least one of representative cells representing battery cells of , and hereinafter, a battery may be interpreted as referring to these examples.
  • a method for estimating a battery state includes determining a state of charge (SOC) of a battery (S100).
  • SOC is a parameter indicating the state of charge of the battery. Since SOC indicates how much energy is stored in the battery, the amount can be expressed as 0 to 100% using a percentage (%) unit. For example, 0% may mean a fully discharged state and 100% may mean a fully charged state, and this expression method may be modified and defined in various ways according to design intentions or embodiments.
  • the battery state estimation method may include determining the SOC of a battery in a rest state.
  • the dormant state means a state in which the battery is not being charged or discharged, and the battery may be a battery stored for a long time after being collected for reuse.
  • the SOC determination of the battery through the step (S100) is a step for roughly estimating the initial state of the battery before diagnosing the state of the battery, and is distinguished from the SOC calculation in the step (S600) described later. Unlike the step (S600) of calculating the exact SOC of the battery, the SOC determination of the step (S100) has the purpose of determining the current sign of the subsequent current application step (S200).
  • the SOC measurement of the battery in step (S100) may use a known method such as a voltage measurement method or a resistance measurement method, and is not limited to a specific SOC measurement method.
  • the battery state estimation method may further include a visual inspection step of determining whether at least one state of damage, swelling, or discoloration of the battery is within a predetermined effective range prior to the step of determining the SOC of the battery (S100).
  • the external inspection for sensing at least one of damage, swelling, and discoloration of the battery may be performed through a camera, optical sensor, or electrochemical impedance spectroscopy, and if it is determined that the inspection result is within a preset effective range, the next step may be performed. there is.
  • the battery state estimation method of the present invention may include applying a charging current or a discharging current to the battery (S200).
  • the magnitude of the charge current or discharge current applied to the battery may be 0.1 C-rate to 1 C-rate, preferably 0.2 C-rate to 0.5 C-rate, and the charge current or discharge current is the nominal capacity of the battery. It may be applied within the range of 0 to 40% of (nominal capacity) and preferably 0 to 20%.
  • the battery state estimation method of the present invention may further include a battery rest step (S201) after the step (S200).
  • the resting step can be maintained for 1 to 60 minutes, preferably 2 to 30 minutes. A short amount of time is enough.
  • the battery is charged or discharged in advance through the steps (S200) and (S201), and the dormant phase is maintained for a predetermined time, thereby activating the battery and making the internal state of the battery uniform before the Nernst OCV estimation step.
  • pre-conditioning the process of pre-charging/discharging the battery before the Nernst OCV estimation step to maintain the idle step is defined as pre-conditioning.
  • Pre-conditioning can be performed with only a low C-rate, which has the advantage of high versatility.
  • the application of the charging current or the discharging current in step S200 is determined by determining the battery SOC in step S100.
  • the charging current may be applied first, and when determined to be greater than or equal to the reference SOC, the discharge current may be applied first.
  • the battery can be charged by applying a charging current, and the SOC of the battery to be measured is the SOC If it is higher than 50%, the battery can be discharged by applying a discharge current.
  • the reference SOC may be a point in the range of 20% to 80%, preferably 30% to 70%.
  • the battery state estimation method of the present invention may further include measuring electrochemical impedance spectroscopy (EIS) after the step (S201) (S202).
  • EIS electrochemical impedance spectroscopy
  • the step of measuring the electrochemical impedance may be performed under a frequency condition between 4 kHz and 0.1 Hz.
  • the electrochemical impedance measurement step (S202) is preferably performed after the rest time of (S201), but may be performed before the step (S201), and is not limited to a specific order.
  • the step of measuring the electrochemical impedance is a step for measuring the resistance in the battery and can be used as an index to increase the accuracy of Nernst OCV estimation.
  • the battery state estimation method of the present invention includes applying at least one charge pulse current and at least one discharge pulse current to the battery (S300).
  • the charging pulse current and the discharging pulse current are applied in a manner in which the charging pulse current and the discharging pulse current are applied by applying the current profile to the battery.
  • the current profile refers to a policy for determining a method or command for applying current/voltage to a battery, and may be designed to include at least one charging pulse and at least one discharging pulse.
  • FIG. 2 illustrates an embodiment of a current profile including one charge pulse current and one discharge pulse current, and a rest time inserted between the application of the charge pulse current and the discharge pulse current.
  • the current profile may be designed in a form in which at least one charge pulse current and at least one discharge pulse current are alternately included. For example, if the charging pulse current is applied to the battery first, the discharging pulse current may be applied next, and if the discharging pulse current is applied first, the charging pulse current may be applied next.
  • the order of applying the charge pulse current or discharge pulse current in step (S300) is determined by the type (sign of current) of the current applied in step (S200), and the pulse current opposite to the sign of the current applied in step (S200) is may be authorized. For example, if the current applied in step (S200) is the charging current, the discharge pulse current may be applied first, and if the current applied in step (S200) is the discharge current, the charging pulse current is applied first. can be designed to be
  • the applied charge pulse current and discharge pulse current may range from 0.1 C-rate to 10.0 C-rate, preferably from 0.1 C-rate to 3.0 C-rate.
  • the charge pulse current and the discharge pulse current may be applied for 0.1 seconds to 500 seconds, preferably 0.1 seconds to 60 seconds, and more preferably 0.1 seconds to 10 seconds. there is.
  • the total charge capacity (Ah) by at least one charging pulse current applied to the battery and the total discharge capacity (Ah) by at least one discharge pulse current applied to the battery may be the same (FIG. 2).
  • the total charge capacity (Ah) by the charge pulse current and the total discharge capacity (Ah) by the discharge pulse current By equalizing the total charge capacity (Ah) by the charge pulse current and the total discharge capacity (Ah) by the discharge pulse current, the non-faradaic current inside the battery is canceled, and the faradaic current Only reactions can be detected.
  • the current profile applied in step S300 may be designed in a form in which a rest step is inserted between at least one charge pulse current and at least one discharge pulse current.
  • a rest step is inserted between at least one charge pulse current and at least one discharge pulse current.
  • the pause step may be included one or more times, may be modified and applied according to design intent, and is not particularly limited (see FIG. 2).
  • the pause step inserted between the at least one charging pulse current and the at least one discharging pulse current may be maintained for 0.1 to 500 seconds, preferably 0.1 to 120 seconds.
  • the total time ⁇ A for which at least one charging pulse current is applied and the total time ( ⁇ B ) for which at least one discharge pulse is applied may be equal to each other.
  • the pause step inserted between the at least one charge pulse current and the at least one discharge pulse current may be set to be maintained for a time ranging from 0.1 ⁇ A to 10 ⁇ A.
  • the method for estimating a battery state includes measuring a change in voltage of a battery that appears when a charge pulse current and a discharge pulse current are applied to the battery (S400).
  • the charging pulse current or the discharging pulse current according to the above-described current profile is applied to the battery, the voltage of the battery is changed, and the changed voltage according to the application of the pulse current is measured.
  • the voltage at this time is a closed circuit voltage (CCV) because it is measured in a state where current is applied.
  • a voltage measured when a charging pulse current is applied may be defined as a charging voltage (V c ), and a voltage measured when a discharge pulse is applied may be defined as a discharge voltage (V d ).
  • V c charging voltage
  • V d discharge voltage
  • 4 illustrates a voltage change pattern of a battery appearing when a pulse current is applied according to an embodiment of the present invention.
  • voltage V c due to application of a charging pulse may be 3.558 V
  • voltage V d due to application of a discharging pulse may be measured as 3.494 V.
  • the battery state estimation method includes calculating an average value based on the V c and V d values and estimating the average value as the Nernst OCV of the battery (S500).
  • the average of V c and V d may be any one of an arithmetic average, a geometric average, and a harmonic average.
  • V c is 3.558 V
  • V d is 3.494 V
  • (3.558 V+3.494 V)/2 3.526 V is calculated using the arithmetic mean, which is one embodiment.
  • 3.526V can be estimated as the Nernst OCV of the battery.
  • Nernst OCV of the battery may be estimated based on a value at which the voltage of the battery converges.
  • the Nernst OCV stabilization time is the time required to estimate the Nernst OCV of the battery, and refers to the time required for the voltage of the battery in a resting state to converge and stabilize to a constant level enough to estimate the Nernst OCV.
  • the Nernst OCV stabilization time may be approximately 12 hours or more or 24 hours or more. As the Nernst OCV stabilization time increases, cost and time are consumed, so it needs to be shortened.
  • the present invention measures the voltage (V c ) after applying the charging pulse current and the voltage (V d ) after applying the discharging pulse, and the average voltage values of the V c and V d are not significantly different from the actual Nernst OCV of the battery. Confirmed.
  • the present invention has technical significance in that the Nernst OCV can be estimated through the CCV without passing through the Nernst OCV stabilization time.
  • An electrochemical reaction means an oxidation or reduction reaction in which electrons are involved.
  • a current is applied (electrons flow) for an electrochemical reaction
  • an electrochemical reaction in which electrons are involved occurs, as well as an electrochemical reaction in which charges are accumulated on the surface of an electrode, such as an electric double-layer Electrons are also used for other purposes.
  • the current required for the electrochemical reaction is referred to as faradaic current
  • the current required for purposes other than the electrochemical reaction, such as generating an electrical double layer is referred to as non-faradaic current.
  • a reaction by the Faraday current may be an oxidation/reduction reaction of a battery electrode, and a thermodynamic state of a corresponding electrode may change due to the oxidation/reduction reaction. Therefore, the reaction by the Faraday current can be interpreted as a change in the energy level of the electrode, that is, the thermodynamic energy level of the electrode.
  • the reaction by the non-Faraday current may be an electric double layer generation reaction generated on the surface of the battery electrode, and this reaction is when electrons are consumed (current is applied) but electrons are transferred to the electrode. Since it is not oxidized/reduced while moving, the energy level of the battery does not change. Therefore, the reaction by the non-Faraday current can be interpreted as a reaction in which the energy level of the electrode, that is, the thermodynamic energy level of the electrode does not change.
  • thermodynamic energy information of the battery when a current is applied to the battery, it is necessary to measure the energy level change value due to the Faraday current. Since they appear simultaneously, it is difficult to detect only the state change of the battery based on the Faraday current.
  • a charge pulse current and a discharge pulse current having the same charge capacity/discharge capacity are alternately flowed, and an average voltage value of voltage values changed accordingly is estimated as Nernst OCV.
  • the average value of the voltage changed according to the application of the pulse current can be considered as the thermodynamic information (OCV) of the battery, and it is considered that there is no large error when this value is compared with the actual Nernst OCV.
  • 5 shows a comparison between the Nernst OCV estimated through the method of the present invention and the actual Nernst OCV.
  • 5 shows an example of an experiment using a battery in the form of a pack and a module.
  • the actual Nernst OCV is a measurement of the convergence voltage by storing the battery under the same conditions in an open circuit state for 24 hours, and the estimated Nernst OCV shows the Nernst OCV estimated using the method of the present invention.
  • the battery state estimation method includes calculating the SOC using the Nernst OCV estimated by the method of the present invention (S600).
  • calculating the SOC using the estimated Nernst OCV may include calculating the SOC by referring to a reference table corresponding to the estimated Nernst OCV.
  • a reference table corresponding to the estimated Nernst OCV may be made into a database and stored in the charge/discharge device in advance, and SOC may be calculated by matching the estimated Nernst OCV to the previously stored reference table.
  • the database may be implemented as a memory included in the charging/discharging device or as an external device such as a server that can be connected to the battery state estimation device by wire, wireless, or network.
  • Reference table corresponding to the OCV estimated by the method of the present invention Since the reference table is used, it is possible to eliminate the hassle of separately managing a reference table corresponding to the previous battery state, and to reduce an error in estimating the battery state due to OCV hysteresis.
  • SOC may be calculated by substituting the Nernst OCV estimated in the present invention into a specific formula.
  • the above formula may use a known formula, and is not limited to a specific formula.
  • the battery state estimation method may perform the above-described Nernst OCV estimation step and SOC calculation step multiple times.
  • the battery state estimation method of the present invention may perform Nernst OCV estimation and SOC calculation multiple times (one time, two times, three times, etc.) in different SOC intervals.
  • the battery may be partially charged or discharged between each cycle (see FIG. 6). For example, as shown in FIG. 6 , after calculating SOC 1 in section A, the battery may be discharged for a certain period of time, and then SOC 2 may be calculated in section B.
  • a method for estimating a battery state includes calculating ⁇ SOC using SOC calculated by performing multiple times, and calculating a capacity life (SOH) of a battery using ⁇ SOC. Do (S700).
  • capacity life represents the degree of aging of a battery.
  • SOH capacity life
  • a battery that is not aged at all is represented by SOH 100%, and conversely, a state in which the battery is unusable due to continued aging can be represented by SOH 0%.
  • the capacity life (SOH) may be calculated through the formula below, but is not limited to a specific formula.
  • Capacity lifetime (SOH) Q occupied /(Capacity nominal ⁇ SOC)
  • Q occupied Means the total amount of applied current
  • Capacity nominal means nominal capacity.
  • the battery state estimation method according to the present invention may be implemented and used in at least one software module.
  • the battery state estimation method may be implemented by a battery management system (BMS).
  • BMS battery management system
  • the present invention determines the SOC of the battery, applies a charging current or a discharging current based on the SOC determination result, applies at least one charging pulse current and at least one discharging pulse current to the battery, and applies the charging pulse current.
  • a battery state including a processor that measures the voltage V c changed when current is applied, measures the voltage V d changed when discharge pulse current is applied, and estimates the average value of the V c and V d as Nernst OCV. Estimation device is provided.
  • the battery state estimation apparatus of the present invention may include a processor and a memory, and the processor may perform the battery state estimation method of the present invention.
  • the memory may store a reference table corresponding to the stabilized Nernst OCV or may store a program in which a battery state estimation method is implemented.
  • the memory may be volatile memory or non-volatile memory.
  • the processor may execute the program and control the battery state estimation device. Program codes executed by the processor may be stored in memory.
  • the battery state estimation device may be connected to an external device (eg, a personal computer or network) through an input/output device (not shown) and exchange data.

Landscapes

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

Abstract

Sont divulgués un procédé d'estimation de l'état d'une batterie et un appareil d'estimation de l'état d'une batterie. La présente invention comprend les étapes consistant à : déterminer l'état de charge de la batterie ; appliquer un courant de charge ou un courant de décharge à la batterie sur la base du résultat de la détermination de l'état de charge ; appliquer au moins un courant d'impulsion de charge et au moins un courant d'impulsion de décharge à la batterie ; mesurer la tension Vc modifiée lorsque le courant d'impulsion de charge est appliqué et mesurer la tension Vd modifiée lorsque le courant d'impulsion de décharge est appliqué ; et estimer la valeur moyenne de Vc et Vd en tant que tension à circuit ouvert de Nernst de la batterie, la tension à circuit ouvert de Nernst étant estimée, et l'état de charge étant calculé de telle sorte que la durée de vie (SOH) de la batterie peut être calculée.
PCT/KR2022/019495 2022-03-03 2022-12-02 Procédé d'estimation de l'état d'une batterie WO2023167394A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2022-0027147 2022-03-03
KR1020220027147A KR20230130238A (ko) 2022-03-03 2022-03-03 배터리 상태 추정 방법

Publications (1)

Publication Number Publication Date
WO2023167394A1 true WO2023167394A1 (fr) 2023-09-07

Family

ID=87883975

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2022/019495 WO2023167394A1 (fr) 2022-03-03 2022-12-02 Procédé d'estimation de l'état d'une batterie

Country Status (2)

Country Link
KR (1) KR20230130238A (fr)
WO (1) WO2023167394A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011209237A (ja) * 2010-03-30 2011-10-20 Furukawa Electric Co Ltd:The 充電率推定方法、充電率推定装置及び二次電池電源システム
KR20150024561A (ko) * 2013-08-27 2015-03-09 삼성에스디아이 주식회사 배터리 관리 시스템 및 그 구동방법
KR101550304B1 (ko) * 2014-12-26 2015-09-04 경북대학교 산학협력단 휴대형 자가 발전 장치
KR20180055123A (ko) * 2016-11-16 2018-05-25 삼성전자주식회사 배터리 상태 추정 방법 및 장치
JP2019124612A (ja) * 2018-01-18 2019-07-25 日立オートモティブシステムズ株式会社 二次電池システム

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200017367A (ko) 2018-08-08 2020-02-18 주식회사 민테크 배터리 진단 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011209237A (ja) * 2010-03-30 2011-10-20 Furukawa Electric Co Ltd:The 充電率推定方法、充電率推定装置及び二次電池電源システム
KR20150024561A (ko) * 2013-08-27 2015-03-09 삼성에스디아이 주식회사 배터리 관리 시스템 및 그 구동방법
KR101550304B1 (ko) * 2014-12-26 2015-09-04 경북대학교 산학협력단 휴대형 자가 발전 장치
KR20180055123A (ko) * 2016-11-16 2018-05-25 삼성전자주식회사 배터리 상태 추정 방법 및 장치
JP2019124612A (ja) * 2018-01-18 2019-07-25 日立オートモティブシステムズ株式会社 二次電池システム

Also Published As

Publication number Publication date
KR20230130238A (ko) 2023-09-12

Similar Documents

Publication Publication Date Title
WO2018124511A1 (fr) Dispositif et procédé de gestion de batterie pour étalonner l'état de charge d'une batterie
WO2019172527A1 (fr) Procédé et appareil d'estimation d'un profil soc-ocv
WO2018190508A1 (fr) Appareil et procédé permettant de calculer un état de charge d'une batterie par réflexion du bruit
WO2010016661A2 (fr) Appareil et procede d’equilibrage d’elements de batterie en fonction du comportement de variation de tension d’un element de batterie
WO2017095066A1 (fr) Appareil et procédé de détection de défaillance de cellule de batterie due à un courant de décharge inconnu
WO2012148070A1 (fr) Dispositif et procédé pour estimer la dégradation d'une capacité de batterie
WO2010016647A1 (fr) Appareil et procédé pour estimer l'état de santé d'une batterie en fonction d'un motif de variation de tension de batterie
WO2019050330A1 (fr) Dispositif et procédé pour estimer l'état de charge d'une batterie
WO2022055080A1 (fr) Procédé d'estimation de l'état de charge d'une batterie
WO2021049753A1 (fr) Appareil et procédé de diagnostic de batterie
WO2018074807A1 (fr) Procédé et système d'équilibrage d'élément de batterie efficace par commande de service
CN1228540A (zh) 精确测定电池剩余容量的装置和方法
WO2012060597A2 (fr) Dispositif et procédé pour annoncer le moment de remplacement d'une batterie
WO2019098576A1 (fr) Dispositif d'estimation de capacité de réserve de batterie
WO2019088746A1 (fr) Appareil et procédé d'estimation de soc de batterie
WO2020262789A1 (fr) Procédé de détection d'une cellule anormale de batterie
WO2021107323A1 (fr) Appareil et procédé de diagnostic de dégradation anormale d'une cellule de batterie
WO2019078658A1 (fr) Dispositif et procédé d'estimation du degré de dégradation d'une batterie sur la base de mégadonnées
WO2022075618A1 (fr) Dispositif de batterie et procédé de prédiction de sortie de batterie
WO2022092621A1 (fr) Appareil et procédé de diagnostic de batterie
WO2023287180A1 (fr) Dispositif de diagnostic de batterie, bloc-batterie, véhicule électrique et procédé de diagnostic de batterie
WO2019088504A1 (fr) Dispositif et procédé de diagnostic de détérioration de batterie
WO2021230533A1 (fr) Dispositif de diagnostic de batterie, et procédé associé
WO2020054924A1 (fr) Appareil et procédé de diagnostic d'état d'une batterie dans une unité de cellule
WO2018131874A1 (fr) Appareil et procédé de commande de charge capables d'économiser de l'énergie et d'équilibrer rapidement des éléments

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: 22930036

Country of ref document: EP

Kind code of ref document: A1