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WO2020055190A1 - Dispositif et procédé permettant de gérer une batterie - Google Patents

Dispositif et procédé permettant de gérer une batterie Download PDF

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Publication number
WO2020055190A1
WO2020055190A1 PCT/KR2019/011871 KR2019011871W WO2020055190A1 WO 2020055190 A1 WO2020055190 A1 WO 2020055190A1 KR 2019011871 W KR2019011871 W KR 2019011871W WO 2020055190 A1 WO2020055190 A1 WO 2020055190A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
remaining capacity
voltage
voltage difference
deterioration
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
Application number
PCT/KR2019/011871
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English (en)
Korean (ko)
Inventor
이은주
배윤정
김용준
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
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
Priority claimed from KR1020190112316A external-priority patent/KR102351637B1/ko
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to US16/769,500 priority Critical patent/US11280842B2/en
Priority to CN201980005674.1A priority patent/CN111344584B/zh
Priority to EP19860512.3A priority patent/EP3690462B1/fr
Priority to JP2020520271A priority patent/JP6908219B2/ja
Publication of WO2020055190A1 publication Critical patent/WO2020055190A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health

Definitions

  • the present invention relates to a battery management apparatus and method, and more particularly, to a battery management apparatus and method for estimating the deterioration degree and life expectancy of a battery using a variety of active materials.
  • the secondary battery generates electric energy through an electrochemical oxidation and reduction reaction, and is used for a wide variety of uses.
  • the secondary battery may include a device that can be carried in a human hand, such as a mobile phone, a laptop computer, a digital camera, a video camera, a tablet computer, or a power tool;
  • Various electric driving power devices such as electric bicycles, electric motorcycles, electric vehicles, hybrid vehicles, electric ships, electric airplanes, etc .;
  • a power storage device used to store electric power generated from renewable energy or surplus electric power;
  • the use area is gradually expanding from server computers and communication base stations to uninterruptible power supplies for stably supplying power to various information communication devices.
  • the secondary battery includes three basic components, which include an anode containing a material that is oxidized while emitting electrons during discharge, and a cathode containing a material that is reduced while receiving electrons during discharge. ), And the electrolyte that enables ion migration between the cathode and the anode.
  • the secondary battery may be classified into a primary battery that cannot be reused after being discharged, and a secondary battery capable of repeated charging and discharging because the electrochemical reaction is at least partially reversible.
  • secondary batteries include lead-acid batteries, nickel-cadmium batteries, nickel-zinc batteries, nickel-iron batteries, silver oxide batteries, nickel metal hydride batteries, zinc-manganese oxide batteries, and zinc-bromide batteries.
  • Metal-air batteries, lithium secondary batteries, and the like are known.
  • lithium secondary batteries are attracting the most commercial attention because of their higher energy density, higher battery voltage, and longer shelf life than other secondary batteries.
  • a secondary battery in which an electrode is formed of a variety of electrode active materials has been developed for high capacity.
  • a secondary battery in which a negative electrode active material is formed using silicon and graphite has higher capacity characteristics and higher energy density characteristics than a secondary battery in which the negative electrode active material is discontinued.
  • a secondary battery in which the electrode is formed of various types of electrode active materials charge and discharge characteristics are different for each electrode active material.
  • a secondary battery in which a negative electrode active material is formed using silicon and graphite causes a chemical reaction in which silicon is more active than graphite in a low capacity section, and a chemical reaction in which graphite is more active than silicon in a high capacity section.
  • the conventional method for estimating the degree of degeneration by comparing the voltage according to the capacity with the reference voltage accurately estimates the degree of degeneration of the secondary battery There is a problem that cannot be done.
  • the present invention calculates the voltage difference for each remaining capacity between the charge voltage and the discharge voltage according to the remaining capacity of the battery, sets the deterioration remaining capacity section based on the voltage difference for each remaining capacity, and corresponds to the remaining capacity among the voltage differences for each remaining capacity
  • An object of the present invention is to provide a battery management apparatus and method for estimating a deterioration degree of a battery based on a voltage difference in a deterioration section included in the deterioration remaining capacity section.
  • a battery management apparatus includes: a sensing unit configured to measure a charging voltage according to the remaining capacity of the battery when charging the battery, and measure a discharge voltage according to the remaining capacity of the battery when discharging the battery; And calculating a voltage difference for each remaining capacity between the charging voltage according to the remaining capacity and the discharge voltage according to the remaining capacity, setting a deterioration remaining capacity section based on the voltage difference for each remaining capacity, and among the voltage differences for each remaining capacity.
  • a processor configured to estimate a deterioration degree of the battery based on at least one of a voltage difference between the deterioration section corresponding to the remaining capacity included in the deterioration remaining capacity section and the number of charge and discharge cycles of the battery in the deterioration remaining capacity section.
  • the processor calculates a voltage difference ratio of each of the voltage differences for each remaining capacity compared to a first voltage difference having the largest voltage difference among the voltage differences for each remaining capacity, and compares the calculated voltage difference ratio with a reference ratio to degenerate the remaining capacity It may be configured to set the section.
  • the processor may be configured to set a section including a remaining capacity corresponding to a voltage difference ratio equal to or greater than the reference ratio among the calculated voltage difference ratios as the deterioration remaining capacity period.
  • the processor may be configured to compare the charge / discharge rate and the reference rate in charging and discharging of the battery, and to change the reference rate according to the comparison result.
  • the processor may be configured to decrease the reference ratio if the charge / discharge rate is greater than or equal to a reference rate, and increase the reference rate if the charge / discharge rate is less than a reference rate.
  • the processor may be configured to calculate an average voltage difference between the deterioration section voltage differences, and to estimate the deterioration degree of the battery by comparing the average voltage difference with a first reference voltage difference.
  • the processor may be configured to estimate a reduction rate of the average voltage difference compared to the first reference voltage difference as a deterioration degree of the battery.
  • the processor may be configured to estimate a deterioration degree of the battery by comparing a second voltage difference and a second reference voltage difference having the largest remaining capacity among the voltage differences of the deterioration section.
  • the processor may be configured to estimate a reduction rate of the second voltage difference compared to the second reference voltage difference as the deterioration degree of the battery.
  • the processor calculates the total number of charge / discharge cycles of the battery and the number of charge / discharge cycles in the deterioration remaining capacity section, and calculates a ratio of the number of times between the charge / discharge cycle and the total charge / discharge cycle. It may be configured to estimate the life expectancy by increasing or decreasing the initial life expectancy in response to the ratio.
  • the processor may be configured to change the available voltage range of the battery according to the estimated deterioration degree of the battery.
  • the processor selects the remaining capacity corresponding to the first voltage difference having the largest voltage difference among the voltage differences for each remaining capacity, and based on the selected remaining capacity and the deterioration degree of the estimated battery, the available voltage range of the battery It can be configured to change at least one of the upper limit and the lower limit.
  • the processor may be configured to increase the reduction width of the available voltage range of the battery as the estimated deterioration degree of the battery increases.
  • the battery pack according to another aspect of the present invention may include a battery management device according to an aspect of the present invention.
  • a battery management method includes a charging voltage measurement step of measuring a charging voltage according to the remaining capacity of the battery when charging the battery; A discharge voltage measurement step of measuring a discharge voltage according to the remaining capacity of the battery when discharging the battery; A voltage difference calculating step of calculating a voltage difference for each remaining capacity between a charging voltage according to the remaining capacity and a discharge voltage according to the remaining capacity; A deterioration remaining capacity section setting step of setting a deterioration remaining capacity section based on the voltage difference for each remaining capacity; And a deterioration degree of the battery based on at least one of a voltage difference between the deterioration remaining capacity sections and a number of charge and discharge times of the battery in the deterioration remaining capacity section.
  • Deterioration for estimating may also include an estimating step.
  • the voltage difference for each remaining capacity between the charging voltage and the discharge voltage according to the remaining capacity of the battery is calculated, and the deterioration remaining capacity section is set based on the voltage difference for each remaining capacity, and corresponding to the voltage difference for each remaining capacity
  • the deterioration degree of the battery may be accurately estimated based on the voltage difference between the deterioration sections included in the deterioration remaining capacity section.
  • FIG. 1 is a view showing the configuration of a battery management apparatus according to an embodiment of the present invention.
  • FIG. 2 is a graph showing charging and discharging voltages of a battery according to the remaining capacity of the battery.
  • FIG. 3 is a graph showing an example of a voltage difference for each remaining capacity between a charging voltage and a discharging voltage of the battery according to the remaining capacity of the battery.
  • FIG. 4 is a graph showing another example of a voltage difference for each remaining capacity between a charging voltage and a discharging voltage of the battery according to the remaining capacity of the battery.
  • FIG. 5 is a graph showing another example of a voltage difference for each remaining capacity between a charging voltage and a discharging voltage of the battery according to the remaining capacity of the battery.
  • FIG. 6 is a graph showing the number of charge / discharge cycles of a battery according to the remaining capacity of the battery.
  • FIG. 7 is a diagram illustrating an example of a voltage reduction width according to a deterioration degree of a battery.
  • FIG. 8 is a view schematically showing a battery management method according to another embodiment of the present invention.
  • FIG. 1 is a view showing the configuration of a battery management apparatus 100 according to an embodiment of the present invention
  • Figure 2 is a graph showing the charge voltage and discharge voltage of the battery B according to the remaining capacity of the battery B
  • FIG. 3 is a graph showing an example of a voltage difference for each remaining capacity between a charging voltage and a discharging voltage of the battery B according to the remaining capacity of the battery B.
  • a battery management apparatus 100 is included in a battery pack 1 including a battery B, and is connected to a battery B to connect the battery B
  • the degeneracy of can be estimated.
  • the battery management apparatus 100 may be included in a battery management apparatus (BMS) provided in the battery pack 1.
  • BMS battery management apparatus
  • the battery B is the smallest unit cell in which the remaining capacity is estimated, and includes a plurality of unit cells electrically connected in series and / or in parallel. Of course, the case where the battery B includes only one unit cell is also included in the scope of the present invention.
  • the battery (B) may be formed of at least one of a positive electrode and a negative electrode as a variety of active materials.
  • the negative electrode of the battery B may be formed of an active material containing graphite and silicon.
  • the battery B may be electrically coupled to various external devices through external terminals.
  • the external device may be, for example, an electric vehicle, a hybrid vehicle, an unmanned aerial vehicle such as a drone, a large-capacity power storage device (ESS) included in a power grid, or a mobile device.
  • ESS large-capacity power storage device
  • the external terminal of the battery B may be selectively coupled with a charging device.
  • the charging device may be selectively coupled to the battery B by control of an external device on which the battery B is mounted.
  • the battery management apparatus 100 may include a sensing unit 110, a memory unit 120, a processor 130, and a notification unit 140 have.
  • the sensing unit 110 is operatively coupled to the processor 130. That is, the sensing unit 110 may be connected to the processor 130 to transmit an electrical signal to the processor 130 or to receive an electrical signal from the processor 130.
  • the sensing unit 110 repeatedly measures the charging voltage applied between the positive electrode and the negative electrode of the battery B every predetermined period when the battery B is in a charged state, and when the battery B is in a discharged state
  • the discharge voltage applied between the positive electrode and the negative electrode of the battery B may be repeatedly measured at predetermined intervals.
  • the charging voltage and the discharging voltage of the battery B may be an open circuit voltage of the battery B.
  • the sensing unit 110 repeatedly measures the charging current flowing into the battery B when the battery B is charged, and repeats the discharge current flowing into the battery B when the battery B is discharged. Can be measured.
  • the sensing unit 110 may provide a measurement signal indicating the measured charge voltage, discharge voltage, charge current, and discharge current to the processor 130.
  • the sensing unit 110 may further include a voltage sensor configured to measure charging and discharging voltages of the battery B.
  • the sensing unit 110 includes a current sensor configured to measure the charging and discharging currents of the battery B.
  • the processor 130 may determine a digital value of each of the charge voltage, discharge voltage, charge current, and discharge current of the battery B through signal processing. In addition, the processor 130 may store the determined digital values of the charge voltage, discharge voltage, charge current, and discharge current of the battery B in the memory unit 120.
  • the memory unit 120 is a semiconductor memory device, and records, erases, and updates data generated by the processor 130 and stores a plurality of program codes provided to estimate deterioration and expected life of the battery B. do. Also, the memory unit 120 may store preset values of various predetermined parameters used when implementing the present invention.
  • the memory unit 120 is not particularly limited in its type as long as it is a semiconductor memory device known to be capable of writing, erasing, and updating data.
  • the memory unit 120 may be DRAM, SDRAM, flash memory, ROM, EEPROM, register, or the like.
  • the memory unit 120 may further include a storage medium storing program codes defining control logic of the processor 130.
  • the storage medium includes an inert storage element such as a flash memory or hard disk.
  • the memory unit 120 may be physically separated from the processor 130 or may be integrally integrated with the processor 130.
  • the processor 130 may estimate the remaining capacity (state of charge) of the battery B based on the charging current input to the battery B and the discharge current output from the battery B.
  • the remaining capacity of the battery B may be a ratio of the charging capacity to the total capacity of the battery B.
  • the remaining capacity may be expressed as 0% to 100%, or may be expressed as 0 to 1.
  • the processor 130 may estimate the remaining capacity of the battery B using a current integration method for integrating the charging and discharging currents of the battery B.
  • the processor 130 has been described as estimating the remaining capacity of the battery B using the current integration method, it is noted that the estimation method is not limited as long as the remaining capacity of the battery B is estimated.
  • the processor 130 may generate the remaining capacity-voltage data of the battery B by mapping the charging voltage and the discharge voltage of the battery B to the estimated remaining capacity of the battery B.
  • the sensing unit 110 measures the charging voltage according to the remaining capacity of the battery B when the battery B is charged, and the discharge voltage according to the remaining capacity of the battery B when the battery B is discharged Can be measured.
  • the sensing unit 110 may measure the charging voltage when the remaining capacity of the battery B is estimated when the battery B is in a charged state.
  • the sensing unit 110 may measure the discharge voltage when the remaining capacity of the battery B is estimated when the battery B is in a discharged state.
  • the remaining capacity-voltage data of the battery B may be displayed as a charging voltage and a discharging voltage curve of the battery B according to the remaining capacity of the battery B.
  • the memory unit 120 approximates the remaining capacity-voltage data of the battery B to the charging voltage and discharge voltage curve of the battery B according to the remaining capacity of the battery B and the battery B
  • Each of the remaining capacity of the battery B may be stored in one or more forms of a look-up table mapped with a charging voltage and a discharging voltage.
  • the processor 130 calculates a voltage difference for each remaining capacity between a charging voltage according to the remaining capacity and a discharge voltage according to the remaining capacity, sets a deterioration remaining capacity section based on the voltage difference for each remaining capacity, and a voltage difference for each remaining capacity Among them, the deterioration degree of the battery may be estimated based on a voltage difference between the deterioration sections included in the deterioration remaining capacity section.
  • the processor 130 may calculate a voltage difference between a charging voltage and a discharging voltage according to the same remaining capacity in all sections of the remaining capacity “0% to 100%”.
  • the processor 130 may calculate a voltage difference for each remaining capacity between the charging voltage according to the remaining capacity and the discharge voltage according to the remaining capacity using Equation 1 below.
  • ⁇ V (SOCn) V ch (SOCn) -V dis (SOCn)
  • ⁇ V (SOCn) is the voltage difference between the charging voltage and the discharge voltage at the remaining capacity n%
  • V ch (SOCn) is the charging voltage at the remaining capacity n%
  • V dis (SOCn) is at the remaining capacity n% Discharge voltage
  • n is 0% to 100%.
  • the voltage difference for each remaining capacity may be different depending on the content of silicon and graphite.
  • the battery (B) in which the negative electrode active material is formed so that the content of silicon is greater than the content of graphite may have a greater voltage difference according to the remaining capacity than the battery (B) in which the negative electrode active material is formed so that the graphite content is greater than the content of silicon.
  • the voltage difference for each remaining capacity may be different according to the content of silicon and graphite depending on the degree of deterioration of the battery B. Specifically, as the battery B degenerates, the voltage difference for each remaining capacity may be small.
  • the battery management apparatus 100 uses a change in the voltage difference for each remaining capacity that occurs depending on the content of the negative electrode material forming the negative electrode active material of the battery B and the deterioration degree of the battery B, and thus the battery B ) Can estimate the deterioration degree and life expectancy.
  • the processor 130 calculates a voltage difference ratio of each voltage difference for each remaining capacity compared to a first voltage difference Va having the largest voltage difference among voltage differences for each remaining capacity, and compares the voltage difference ratio and a reference ratio to degrade the remaining capacity section (Rag) can be set.
  • the processor 130 sets the voltage difference “0.4V” corresponding to the remaining capacity “10%” from the voltage difference corresponding to each of the remaining capacity “0% to 100%” as the first voltage difference. (Va). Thereafter, the processor 130 may calculate a voltage difference ratio of each of the remaining voltage differences for each remaining capacity compared to the first voltage difference Va.
  • the processor 130 may calculate the voltage difference ratio using Equation 2 below.
  • R v (SOCn) is the ratio of the voltage difference at the remaining capacity n%
  • ⁇ V (SOCn) is the voltage difference between the charge voltage and the discharge voltage at the remaining capacity n%
  • Va is the most voltage difference among the voltage differences for each remaining capacity.
  • the large first voltage difference, n is 0% to 100%.
  • the processor 130 may calculate a voltage difference ratio in the remaining capacity “45%”.
  • the voltage difference V45 at the remaining capacity "45%” may be "0.16V”.
  • the processor 130 may calculate a ratio of the voltage difference between the first voltage difference V3a and “0.4V” and the voltage difference V45 and “0.16V” as “0.4”.
  • the processor 130 may calculate a voltage difference ratio in the remaining capacity "2%".
  • the voltage difference V2 at the remaining capacity "2%” may be "0.16V”.
  • the processor 130 may calculate a ratio of the voltage difference between the first voltage difference V3a and “0.4V” and the voltage difference V2 and “0.16V” as “0.4”.
  • the processor 130 may calculate a voltage difference ratio in all sections of the remaining capacity "0% to 100%" in the manner described above.
  • the processor 130 may set a section in which the calculated voltage difference ratio is greater than or equal to a reference ratio as a deterioration remaining capacity section Rag. Specifically, the processor 130 may compare the calculated voltage difference ratio and the magnitude of the reference ratio, and set a section including the residual capacity having a voltage difference ratio equal to or greater than the reference ratio as the deterioration residual capacity section Rag as a result of the comparison. .
  • the reference ratio is set to "0.4".
  • the processor 130 may compare the magnitude of each voltage difference ratio calculated for each remaining capacity and the reference ratio "0.4". Thereafter, the processor 130 may set the remaining capacity “2% to 45%” section corresponding to the voltage difference ratio greater than or equal to the reference ratio “0.4” as the degenerated remaining capacity section Rag.
  • the deterioration remaining capacity section (Rag) among the various types of negative electrode active materials forming the negative electrode of the battery B, a specific type of negative electrode active material that generates a voltage difference between the charging voltage and the discharge voltage may cause a chemical reaction to be more active.
  • the deterioration remaining capacity section Rag may be a remaining capacity section in which a voltage difference between a charging voltage and a discharging voltage of the battery B occurs above a specific voltage.
  • the negative electrode of the battery B is formed of silicon and graphite, and when the battery B is charged and discharged in the deterioration remaining capacity section Ra, silicon generating a voltage difference between the charge voltage and the discharge voltage is graphite It can cause more vigorous chemical reactions. Accordingly, a voltage difference between the charging voltage and the discharging voltage of the battery B may occur at a specific voltage or higher in the deterioration remaining capacity section Rag.
  • the battery (B) having a negative electrode formed of a negative electrode active material containing a heterogeneous material is degraded, the voltage difference between the charge voltage and the discharge voltage of the battery (B) in the deterioration remaining capacity section (Rag) decreases. It has the characteristic.
  • the processor 130 may classify a voltage difference in which the corresponding residual capacity is included in the degenerated residual capacity section Rag among the calculated voltage differences for each remaining capacity as the deteriorated section voltage difference.
  • the processor 130 includes a voltage difference in which the corresponding remaining capacity is included in the degenerated remaining capacity section “2% to 45%” among the calculated voltage differences for each remaining capacity. It can be classified as a voltage difference in the degeneration section.
  • the processor 130 may calculate an average voltage difference of the voltage difference between the degeneration sections, and compare the average voltage difference with the first reference voltage difference to estimate the deterioration degree.
  • the processor 130 sums the voltage difference corresponding to each of the remaining capacity included in the degenerated remaining capacity section Rag, and adds the summed result to the maximum and minimum remaining capacity of the degenerated remaining capacity section Rag.
  • the average voltage difference can be calculated by dividing the difference between the remaining capacitances of the liver.
  • the processor 130 sums the voltage difference corresponding to each of the remaining capacity included in the degenerated remaining capacity section Rag, and adds the summed result to the remaining capacity of the degenerated remaining capacity section Rag Divided by the difference "44%", the average voltage difference can be calculated.
  • the residual capacity difference "44%" of the degenerated remaining capacity section Rag is the size of the degenerated remaining capacity section Rag, and is calculated based on the minimum remaining capacity "2%" and the maximum remaining capacity "45%". You can.
  • the processor 130 may calculate “45-2 + 1” (%) to calculate the size of the degenerated remaining capacity section Rag.
  • the processor 130 may be configured to estimate the deterioration degree of the battery B by comparing the calculated average voltage difference with the first reference voltage difference. Specifically, the processor 130 may estimate the reduction rate of the average voltage difference compared to the first reference voltage difference as a deterioration degree. That is, the processor 130 may estimate the rate at which the average voltage difference is reduced based on the first reference voltage difference as the degree of deterioration.
  • the first reference voltage difference may be an average voltage difference calculated by the same method as described above from a battery in a non-degraded BOL state.
  • the first reference voltage difference may be obtained in advance from the battery in the BOL state and stored in the memory unit 120.
  • the BOL state means an initial lifespan in which the cycle count of the battery B is less than a predetermined value.
  • the processor 130 may estimate the deterioration degree of the battery B using Equation 3 below.
  • D is the deterioration degree of the battery B
  • R1 is the first reference voltage difference
  • V AVR is the average voltage difference
  • the processor 130 may estimate the deterioration degree of the battery B as “14.285%”.
  • the degree of degeneration may mean the degree of degeneration of the battery B, which is the object of estimation of the degree of deterioration compared to a battery in the BOL state.
  • the processor 130 may optionally include an application-specific integrated circuit (ASIC), other chipsets, logic circuits, registers, communication modems, data processing devices, and the like known in the art to execute various control logics. At least one of various control logics that can be executed by the processor 130 is combined, and the combined control logics can be written in a computer-readable code system and stored in a computer-readable recording medium. If the recording medium is accessible by the processor 130 included in the computer, there is no particular limitation on the type. As an example, the recording medium includes at least one or more selected from the group comprising ROM, RAM, registers, CD-ROM, magnetic tape, hard disk, floppy disk, and optical data recording device.
  • ASIC application-specific integrated circuit
  • code system may be modulated with a carrier signal and included in a communication carrier at a specific point in time, and may be distributed and stored and executed in a networked computer.
  • functional programs, code, and code segments for implementing combined control logics can be easily deduced by programmers in the art.
  • the notification unit 140 may receive the estimation result of the processor 130 and output it to the outside. More specifically, the notification unit 140 displays at least one of a display unit and a speaker unit for outputting sound as a display unit using one or more of symbols, numbers, and codes to estimate the deterioration result of the battery B described above. It may be provided.
  • the notification unit 140 may also receive and output the estimation result of the deterioration degree of the battery B of the processor 130 'according to another embodiment described below. In addition, the notification unit 140 may also receive an output of an estimation result of an expected life for the battery B of the processor 130 "according to another embodiment, which will be described later, and output it to the outside.
  • the notification unit 140 may output the estimated progress to the external terminal COM to output the estimation result to the outside.
  • the processor 130 may be configured to compare the charge / discharge rate and the reference rate in charging and discharging of the battery B.
  • the rate is a charge / discharge rate capable of charging or discharging the amount of electricity corresponding to the capacity of the battery B for 1 hour. For example, if the battery B, which is in a fully charged state, is discharged to the searate "1C", the battery B can be fully discharged after 1 hour.
  • the reference rate is a rate corresponding to the reference rate, and may be a value stored in advance in the memory unit 120. That is, a lookup table in which the ratio corresponding to the charge / discharge rate is matched may be stored in the memory portion.
  • the processor 130 may estimate the charge / discharge rate based on the charge / discharge time and the remaining capacity of the battery B.
  • charging starts when the initial remaining capacity of the battery B is “0%”, and after 1 hour, if the remaining capacity of the battery B becomes “100%”, the processor 130 ) Can estimate the charging rate as "1C".
  • the processor 130 may be configured to change the reference ratio according to a result of comparing the charge / discharge rate and the reference rate. For example, when the charging / discharging rate is changed, the voltage difference for each remaining capacity of the battery B may change during charging and discharging. That is, the voltage difference for each remaining capacity may be affected by the rate.
  • FIG. 4 is a graph showing another example of a voltage difference for each remaining capacity between the charging voltage and the discharging voltage of the battery B according to the remaining capacity of the battery B. 3, it is assumed that charging and discharging of the battery B is performed at a reference rate, and FIG. 4 is that charging and discharging of the battery B is performed at a charging and discharging rate that is greater than the reference rate.
  • the first voltage difference having the largest voltage difference among the voltage differences for each remaining capacity is different. That is, in the embodiment of FIG. 3, the first voltage difference V3a is 0.4 [V], but in the embodiment of FIG. 4, the first voltage difference V4a is 0.5 [V]. That is, as the charge / discharge rate increases, the difference between the charge voltage for each remaining capacity and the discharge voltage for each remaining capacity may be greater.
  • the processor 130 may change the deterioration remaining capacity section, which is the basis of the estimation of the deterioration degree of the battery B, by changing the reference ratio to correspond to the charge / discharge rate.
  • the processor 130 may set the remaining capacity “2% to 45%” section corresponding to the voltage difference “0.16 [V] to 0.4 [V]” for each remaining capacity as the degenerated remaining capacity section (Rag).
  • the first voltage difference V4a is “0.5 [V]”, and the first voltage difference V4a multiplied by a reference ratio is “0.2 [V]”. Accordingly, according to the same reference ratio as the embodiment of FIG. 3, the processor 130 degrades the remaining capacity “1% to 45%” section corresponding to “0.2 [V] to 0.5 [V]” as the deterioration remaining capacity section (Rag1 ). In this case, although the first voltage difference V4a of the embodiment of FIG. 4 is increased by 25% than the first voltage difference V3a of the embodiment of FIG. 3, the size of the deterioration remaining capacity section is set to be almost the same There is. That is, since the ratio according to the charge / discharge rate was not considered, it can be considered that some sections affecting the deterioration degree of the battery B were excluded from the remaining capacity section Rag1.
  • the processor 130 since the charging and discharging of the battery B was performed at a different rate than the reference rate, the processor 130 refers to the lookup table stored in the memory unit 120.
  • the reference ratio can be changed.
  • the remaining capacity “0.8% to 53%” section may be set as the degenerated remaining capacity section Rag2.
  • the battery management apparatus 100 has an advantage in that the deterioration degree of the battery B can be more accurately estimated by changing the reference ratio for setting the deterioration remaining capacity section Rag2 according to the charge / discharge rate. In addition, since the deterioration degree of the battery B is calculated in consideration of charging and discharging rates, there is an advantage that reliability in the estimated deterioration degree of the battery B can be improved.
  • the processor 130 may be configured to reduce the reference ratio when the charge / discharge rate is greater than or equal to the reference rate. Conversely, the processor 130 may be configured to increase the reference ratio when the charge / discharge rate is less than the reference rate.
  • the voltage difference for each remaining capacity may increase. That is, even if the charging / discharging rate is increased, if the deterioration remaining capacity section Rag1 is set to a reference rate corresponding to the reference rate, some sections that may actually affect the deterioration degree of the battery B There is a problem that can be excluded.
  • the processor 130 may reduce the reference rate by referring to the lookup table stored in the memory unit 120. In this case, since the range of the degenerated remaining capacity section Rag2 becomes larger, the deterioration degree of the battery B can be more accurately diagnosed.
  • the processor 130 may increase the reference rate by referring to the lookup table stored in the memory unit 120. In this case, the range of the deterioration remaining capacity section may be smaller. However, since the battery (B) was charged and discharged at a lower rate of charge and discharge rate than the reference rate, sections not significantly related to the deterioration of the battery (B) were excluded, and the deterioration of the battery (B) was significantly affected. The deterioration remaining capacity section can be set only for the sections in which it affects. Accordingly, there is an advantage in that the time and resources required for the processor 130 to estimate the deterioration degree of the battery B can be saved.
  • the battery management apparatus 100 may change the size of the deterioration remaining capacity section by changing the reference ratio based on the charging / discharging rate of the battery B. Therefore, since the deterioration degree of the battery B is estimated in consideration of the increase and decrease of the charge / discharge rate, the accuracy and reliability of the battery B deterioration degree estimation can be improved. In addition, the time and resources required for battery B deterioration estimation are saved, so that battery B deterioration estimation can be efficiently performed.
  • 5 is a graph showing another example of a voltage difference for each remaining capacity between the charging voltage and the discharging voltage of the battery B according to the remaining capacity of the battery B.
  • the processor 130 ′ may differ only in a process of estimating the deterioration degree of the processor 130 and the battery B according to an embodiment. That is, before estimating the deterioration degree of the battery B, the processor 130 'and the processor 130 calculate the voltage difference for each remaining capacity, set the deterioration remaining capacity section Rag, and set the voltage difference between the deterioration sections.
  • the classification process can be performed in the same way. Therefore, repeated descriptions will be omitted.
  • the processor 130 ′ may determine the first voltage difference V5a having the largest voltage difference for each remaining capacity. Then, the deterioration remaining capacity section Rag may be set based on the first voltage difference V5a and the reference ratio.
  • the reference ratio may be "0.4".
  • the processor 130 ′ may estimate the degree of deterioration by comparing the second voltage difference Vb having the largest remaining capacity among the voltage differences between the deterioration section and the second reference voltage difference.
  • the processor 130 ′ may determine the largest remaining capacity of the degenerated remaining capacity section Rag as “50%”. Then, the processor 130 'may select the voltage difference corresponding to the remaining capacity "50%" as the second voltage difference Vb.
  • the processor 130 ′ may classify a voltage difference between the deterioration sections having the largest remaining capacity among the voltage differences of the deterioration sections as the second voltage difference Vb.
  • the processor 130 ′ may estimate the reduction rate of the second voltage difference Vb compared to the second reference voltage difference as a deterioration degree. More specifically, the processor 130 ′ may estimate the rate at which the second voltage difference Vb is reduced based on the second reference voltage difference as the degree of degeneration.
  • the processor 130 ′ calculates a reduction ratio of the second voltage difference Vb to the second reference voltage difference, and estimates the calculated reduction ratio as the deterioration degree of the battery B You can.
  • the second reference voltage difference may be a voltage difference obtained in the same manner as described above from the battery B in the undegraded BOL state. That is, the voltage difference obtained from the battery in the BOL state is the same as the method in which the processor 130 'according to another embodiment obtains the second voltage difference Vb from the battery B, which is the object of the deterioration degree estimation. 2 may be a reference voltage difference. The second reference voltage difference may be obtained in advance from the battery in the BOL state and stored in the memory unit 120.
  • the processor 130 ′ may estimate the degree of degeneration using Equation (4).
  • D is the deterioration degree of the battery B
  • R2 is the second reference voltage difference
  • Pew is the second voltage difference
  • the processor 130 ′ may have a second residual voltage difference of “50%”, which is the largest voltage difference (Vb) “0.1V” among the deterioration section voltage differences. "And the second reference voltage difference” 0.15V “can be compared to estimate the degree of degradation.
  • the second reference voltage difference "0.15V” may be obtained in advance from the battery in the BOL state, as described above, and stored in the memory unit 120.
  • the processor 130 ′ may estimate the reduction rate “33.33%” of the second voltage difference Vb “0.1V” compared to the second reference voltage difference “0.15V” as the deterioration of the battery B. .
  • FIG. 6 is a graph showing the number of charge / discharge cycles of the battery B according to the remaining capacity of the battery B.
  • the processor 130 ′′ may further estimate the expected lifespan compared to the processor 130, and the process of setting the deterioration remaining capacity section Rag by calculating the voltage difference for each remaining capacity may be the same. Therefore, repeated descriptions will be omitted.
  • a specific negative electrode active material that generates a voltage difference between the charging voltage and the discharge voltage among the various negative electrode active materials may cause a chemical reaction more frequently. have. In this case, the life expectancy of the battery B may be reduced.
  • the processor 130 may accumulate and calculate the total number of charge / discharge cycles of the battery B and the number of charge / discharge cycles in the deterioration remaining capacity section.
  • the processor 130 may calculate the ratio of the number of times between degenerate charge and discharge times and the total number of charge and discharge times.
  • the processor 130 estimates and changes the expected life of the battery B in response to the calculated number ratio You can. Further, the processor 130 "may calculate the deterioration degree of the battery B based on the total number of charge / discharge cycles of the battery B and the estimated life expectancy.
  • the initial life expectancy may be the life expectancy estimated from the battery in the BOL state. That is, the expected life of the battery B set as the initial life expectancy may be estimated and changed by the processor 130 "as the battery B is charged and discharged.
  • the processor 130 "checks whether the remaining capacity of the battery B is included in the degenerated remaining capacity section Rag when the battery B is charged and discharged, and when the remaining capacity is included in the degenerated remaining capacity section Rag The number of times of degeneration charge / discharge can be increased. In addition, when the battery B is charged / discharged, the processor 130 "total charge regardless of whether the remaining capacity of the battery B is included in the degenerated remaining capacity section Rag. The number of discharges can be increased.
  • the processor 130 may calculate the ratio of the number of times of degenerate charge / discharge to the total number of charge / discharge and decrease the initial life expectancy as the number ratio increases corresponding to the calculated number ratio to estimate the life expectancy.
  • the processor 130 may estimate the life expectancy L using Equation 5 below.
  • L is the life expectancy
  • L init is the initial life expectancy of the battery B
  • N total is the total number of charges and discharges of the battery B
  • N deg is the number of degeneration charges and discharges of the battery B
  • the processor 130 ′′ may calculate a ratio (N deg ⁇ N total ) of the number of times of degenerating charge and discharge (N deg ) to the total number of charge and discharge (N total ). In addition, the processor 130 ′′ may calculate the corrected count ratio ((N deg ⁇ N total ) -a) based on the calculated count ratio (N deg ⁇ N total ) and the correction constant (a). The processor 130 ′′ is based on the corrected number ratio ((N deg ⁇ N total ) -a) and the total number of charge / discharge times (N total ), the corrected number of charge / discharge times (N total + (N total ⁇ ((( N deg ⁇ N total ) -a))) can be calculated.
  • the processor 130 '' subtracts the total number of charges and discharges (N total + (N total ⁇ ((N deg ⁇ N total ) -a))) corrected from the initial life expectancy (L init ), and the battery ( The life expectancy (L) of B) can be calculated.
  • the processor 130 may accumulate the total number of charge / discharge counts as" 300cycle ", and calculate the degenerated charge / discharge counts as" 200cycle ".
  • the processor 130 may calculate" 50cycle “by multiplying” 1/6 “by subtracting the correction constant” 0.5 “from the number ratio” 2/3 "by the total number of charge and discharge times” 300cycle ".
  • the processor 130 may estimate the expected life of the battery B to be “650 cycles” by subtracting “350cycles” obtained by adding “50cycles” calculated to the total number of charge and discharge times “300cycles” from the initial life expectancy of “1000cycles”. have.
  • the processor 130 does not simply estimate the expected life by subtracting the total number of charge and discharge times "300cycle” from the initial expected life "1000cycle”, but the degenerated remaining capacity section (accelerating degeneration) Rag), the life expectancy of the battery B can be estimated based on the ratio of the number of charge / discharge charges / discharges in which the battery B is charged and discharged and the total charge / discharge count. For example, as in the previous example, the processor 130 " ) May estimate the expected life of the battery B to be "650cycle” by subtracting "350cycle” from the initial life expectancy of "1000cycle", which is more than the total number of charge and discharge times of the battery B "300cycle".
  • the processor 130 may calculate a rate of change between the initial life expectancy and the estimated life expectancy, and calculate the deterioration degree of the battery B.
  • the processor 130 may calculate a change rate between the initial expected life of" 1000cycle “and the estimated expected life of” 650cycle “as” 35%. "Here, the processor 130" may have an initial expected life. And the estimated change rate between life expectancy is calculated as “(1000-650) ⁇ 1000 ⁇ 100”, so that the deterioration degree of the battery B can be calculated as “35%”.
  • the processor 130 may be configured to change the available voltage range of the battery B according to the estimated deterioration degree of the battery B.
  • the battery B in the BOL state and the degraded battery B may have different states even at the same voltage.
  • the voltages of the battery B and the battery B in the BOL state are both "4.2 [V]”.
  • the battery B in the BOL state may be fully charged at "4.2 [V]", but the degenerated battery B may be overcharged at "4.2 [V]”.
  • the processor 130 may change the available voltage range of the battery B according to the deterioration degree of the battery B in consideration of this point.
  • FIG. 7 is a view showing an example of a voltage reduction width according to the deterioration degree of the battery B.
  • the deterioration degree of the battery B illustrated in FIG. 7 and the corresponding voltage reduction width may be stored in the memory unit 120.
  • the processor 130 may estimate the deterioration degree of the battery B, and change the available voltage range of the battery B by referring to the estimated voltage reduction width corresponding to the deterioration degree of the battery B.
  • the battery management apparatus 100 may set the available voltage range corresponding to the deterioration degree of the battery B by changing the available voltage range of the battery B in consideration of the deterioration degree of the battery B. Therefore, the battery management apparatus can prevent the battery B from being overdischarged or overcharged.
  • the processor 130 may select a remaining capacity corresponding to the first voltage difference having the largest voltage difference among the voltage differences for each remaining capacity.
  • the processor 130 may select “0.4 [V]” as the first voltage difference V3a. Also, the processor 130 may select “10%” as the remaining capacity corresponding to the first voltage difference V3a.
  • the processor 130 may be configured to change at least one of an upper limit value and a lower limit value of the available voltage range of the battery B.
  • the available voltage range of the battery B in the BOL state may be set to "2.4 [V] to 4.2 [V]". That is, when the voltage of the battery B in the BOL state is less than "2.4 [V]", the processor 130 may determine that the battery B in the BOL state is in an overdischarge state. In addition, when the voltage of the battery B in the BOL state exceeds "4.2 [V]", the processor 130 may determine that the battery B in the BOL state is overcharged.
  • the processor 130 may change both the upper and lower limits of the available voltage range of the battery B according to the degree of deterioration of the battery B. That is, when the battery B is degenerated, the processor 130 may decrease the upper limit of the available voltage range of the battery B and increase the lower limit, thereby reducing the size of the available voltage range of the battery B.
  • the processor 130 may change the upper limit value or the lower limit value of the available voltage range of the battery B according to the section to which the remaining capacity corresponding to the first voltage value of the battery B belongs in the remaining capacity section. .
  • the processor 130 may use the available voltage of the battery B based on the deterioration degree of the battery B The lower limit of the range can be increased.
  • the processor 130 may set the battery B based on the deterioration degree of the battery B. Can increase the lower limit of the available voltage range. Conversely, when the remaining capacity corresponding to the largest voltage difference among the voltage differences for each remaining capacity belongs to the “50% or more and 100% or less” section, the processor 130 may use the battery B, based on the deterioration degree of the battery B. ) Can reduce the upper limit of the available voltage range.
  • the battery management apparatus 100 may prevent the depleted battery B from being overdischarged and / or overcharged by changing the available voltage range of the battery B according to the deterioration degree of the battery B. have.
  • the battery management apparatus 100 reflects the state of the battery B in more detail by changing the upper limit value or the lower limit value of the voltage operation range of the battery B, based on the remaining capacity having the largest voltage difference for each remaining capacity. , It is possible to prevent over-discharge and / or over-charging of the battery B.
  • the processor 130 may be configured to increase the decrease of the available voltage range of the battery B as the estimated deterioration degree of the battery B increases. That is, as the degree of deterioration of the battery B increases, the processor 130 may gradually decrease the available voltage range of the battery B.
  • the processor 130 may gradually decrease the upper limit value of the available voltage range of the battery B. Further, the processor 130 may increase the lower limit of the available voltage range of the battery B more and more as the degree of deterioration of the battery B increases.
  • the voltage reduction width increases by about “0.04 [V]”.
  • the voltage reduction width increases by about "0.18 [V]”.
  • the processor 130 sets the available voltage range of the battery B to “0.04 [V] ".
  • the battery B having a deterioration degree of “20%” further degenerates, so that the battery B has a deterioration degree of “40%”.
  • the degeneration degree of the battery B is increased by “20%”, the same as the deterioration degree increased from “0%” to “20%”, but the processor 130 increases the available voltage range of the battery B. It can be further reduced by "0.18 [V]". That is, the processor 130 may increase the reduction width of the available voltage range as the degree of deterioration of the battery B increases.
  • the battery management apparatus has the advantage that the overcharge and over-discharge of the battery B can be more strictly prevented by further limiting the available voltage range of the battery B as the degree of deterioration of the battery B increases. have.
  • the vehicle according to the present invention may include the battery management device 100 described above. Through this, it is possible to estimate the deterioration degree and life expectancy of the battery provided in the vehicle.
  • the energy storage device according to the present invention may include the battery management device 100 described above. Through this, it is possible to estimate the deterioration degree and the expected life of the battery provided in the energy storage device.
  • FIG. 8 is a view schematically showing a battery management method according to another embodiment of the present invention.
  • the battery management method illustrated in FIG. 8 may be performed by a battery management apparatus according to an embodiment of the present invention.
  • a battery management method includes a charging voltage measurement step (S100), a discharge voltage measurement step (S200), a voltage difference calculation step (S300), and a deterioration remaining capacity section setting step (S400). ) And a deterioration degree estimation step (S500).
  • the charging voltage measurement step S100 is a step of measuring a charging voltage according to the remaining capacity of the battery when the battery B is charged, and may be performed by the sensing unit 110.
  • the sensing unit 110 may repeatedly measure the charging voltage applied between the positive electrode and the negative electrode of the battery B every predetermined period. Specifically, the sensing unit 110 measures the potential of the positive electrode and the negative electrode of the battery B, obtains the difference between the measured potential of the positive electrode and the negative electrode, and charges the voltage of the battery B Can be measured.
  • the discharge voltage measurement step S200 is a step of measuring a discharge voltage according to the remaining capacity of the battery B when the battery B is discharged, and may be performed by the sensing unit 110.
  • the sensing unit 110 may repeatedly measure the discharge voltage applied between the positive electrode and the negative electrode of the battery B every predetermined period when the battery B is in a discharged state. Specifically, the sensing unit 110 measures the potential of the positive electrode and the negative electrode of the battery B, calculates the difference between the measured potential of the positive electrode and the negative electrode, and discharges the voltage of the battery B Can be measured.
  • the voltage difference calculating step S300 is a step of calculating a voltage difference for each remaining capacity between a charging voltage according to the remaining capacity and a discharge voltage according to the remaining capacity, and may be performed by the processor 130.
  • the processor 130 may receive signals for the measured voltage and the discharge voltage from the sensing unit 110 and determine the charging voltage and the discharge voltage of the battery B through signal processing.
  • the processor 130 may generate the remaining capacity-voltage data of the battery B by mapping the charging voltage and the discharging voltage of the battery B to the remaining capacity of the battery B. For example, as illustrated in FIG. 3, the processor 130 may generate residual capacity-voltage data mapped with a charging voltage and a discharging voltage of the battery for each remaining capacity of the battery B.
  • the processor 130 may calculate a voltage difference for each remaining capacity between the charging voltage according to the remaining capacity and the discharge voltage according to the remaining capacity. Specifically, the processor 130 may calculate a voltage difference for each remaining capacity by obtaining a difference between the charge voltage and the discharge voltage for the same remaining capacity. For example, the voltage difference for each remaining capacity calculated by the processor 130 based on the remaining capacity-voltage data of FIG. 3 may be a voltage difference for each remaining capacity illustrated in FIG. 4.
  • the deterioration remaining capacity section setting step (S400) is a step of setting the deterioration remaining capacity section based on the voltage difference for each remaining capacity, and may be performed by the processor 130.
  • the processor 130 calculates a voltage difference ratio of each voltage difference for each remaining capacity compared to a first voltage difference Va having the largest voltage difference among voltage differences for each remaining capacity, and calculates the voltage difference ratio and reference By comparing the ratios, the deterioration remaining capacity interval (Rag) can be set.
  • the reference ratio is set to “40%”, and the first voltage difference Va may be “0.4V”.
  • the processor 130 may set a remaining capacity “2% to 45%” section corresponding to a voltage difference ratio higher than or equal to a reference ratio among the calculated voltage difference ratios as a deterioration remaining capacity section Rag.
  • the deterioration degree estimating step (S500) among the voltage difference for each remaining capacity, the voltage difference between the deterioration section corresponding to the remaining capacity included in the deterioration remaining capacity section and the number of charge / discharge times of the battery B in the deterioration remaining capacity section as a step of estimating the degree of deterioration of the battery B based on at least one, it may be performed by the processor 130.
  • the processor 130 may classify a voltage difference in which the corresponding residual capacity is included in the degenerated remaining capacity section Rag among the calculated voltage differences for each remaining capacity as the deteriorated section voltage difference.
  • the processor 130 may calculate an average voltage difference between the deterioration section voltage differences and compare the calculated average voltage difference with the first reference voltage difference to estimate the deterioration degree.
  • the first reference voltage difference may be an average voltage difference calculated by the same method as described above from a battery in a non-degraded BOL state.
  • the processor 130 estimates the deterioration degree of the battery B as “14.285%”. can do.
  • the processor 130 may accumulate and calculate the total number of charge / discharge cycles of the battery B and the number of charge / discharge cycles in the deterioration remaining capacity section Rag. In addition, the processor 130 may calculate the ratio of the number of times between degenerate charge and discharge times and the total number of charge and discharge times. The processor 130 may estimate and change the expected life of the battery B in response to the calculated number of times. In addition, the processor 130 may calculate the deterioration degree of the battery B based on the total number of charge / discharge cycles of the battery B and the estimated life expectancy.
  • the embodiment of the present invention described above is not implemented only through an apparatus and a method, and may be implemented through a program that realizes a function corresponding to the configuration of the embodiment of the present invention or a recording medium in which the program is recorded.
  • the implementation can be easily implemented by those skilled in the art to which the present invention pertains from the description of the above-described embodiments.

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

Abstract

La présente invention concerne un dispositif et un procédé qui permettent de gérer une batterie, et qui sont conçus pour définir une section de capacité restante dégradée sur la base d'une différence de tension en fonction d'une capacité restante entre une tension de charge et une tension de décharge suivant la capacité restante de la batterie, et pour évaluer le degré de dégradation de ladite batterie sur la base d'une différence de tension dans la section de capacité restante dégradée définie.
PCT/KR2019/011871 2018-09-12 2019-09-11 Dispositif et procédé permettant de gérer une batterie Ceased WO2020055190A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US16/769,500 US11280842B2 (en) 2018-09-12 2019-09-11 Battery management apparatus and method
CN201980005674.1A CN111344584B (zh) 2018-09-12 2019-09-11 电池管理装置和方法
EP19860512.3A EP3690462B1 (fr) 2018-09-12 2019-09-11 Dispositif et procédé permettant de gérer une batterie
JP2020520271A JP6908219B2 (ja) 2018-09-12 2019-09-11 バッテリー管理装置及び方法

Applications Claiming Priority (4)

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KR10-2018-0109210 2018-09-12
KR20180109210 2018-09-12
KR1020190112316A KR102351637B1 (ko) 2018-09-12 2019-09-10 배터리 관리 장치 및 방법
KR10-2019-0112316 2019-09-10

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JP2008179284A (ja) * 2007-01-25 2008-08-07 Toyota Motor Corp 二次電池の劣化判定装置
KR20110053001A (ko) * 2009-11-13 2011-05-19 주식회사 포스코 배터리의 잔존수명 측정방법
JP2012057956A (ja) * 2010-09-06 2012-03-22 Calsonic Kansei Corp バッテリの劣化度推定装置
KR20120120889A (ko) * 2011-04-25 2012-11-02 주식회사 엘지화학 배터리 용량 퇴화 추정 장치 및 방법
KR20160051327A (ko) * 2014-11-03 2016-05-11 주식회사 엘지화학 배터리 용량 퇴화 추정 장치
KR20180109210A (ko) 2017-03-27 2018-10-08 주식회사 카이테크 차량용 전자기기의 구동장치
KR20190112316A (ko) 2017-02-02 2019-10-04 코닝 인코포레이티드 유리 표면 가까이에 변경된 k2o 프로파일을 갖는 리튬 함유 유리 또는 유리 세라믹 물품

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KR20110053001A (ko) * 2009-11-13 2011-05-19 주식회사 포스코 배터리의 잔존수명 측정방법
JP2012057956A (ja) * 2010-09-06 2012-03-22 Calsonic Kansei Corp バッテリの劣化度推定装置
KR20120120889A (ko) * 2011-04-25 2012-11-02 주식회사 엘지화학 배터리 용량 퇴화 추정 장치 및 방법
KR20160051327A (ko) * 2014-11-03 2016-05-11 주식회사 엘지화학 배터리 용량 퇴화 추정 장치
KR20190112316A (ko) 2017-02-02 2019-10-04 코닝 인코포레이티드 유리 표면 가까이에 변경된 k2o 프로파일을 갖는 리튬 함유 유리 또는 유리 세라믹 물품
KR20180109210A (ko) 2017-03-27 2018-10-08 주식회사 카이테크 차량용 전자기기의 구동장치

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