WO2025178356A1 - 배터리 용량 추정 장치 및 방법 - Google Patents
배터리 용량 추정 장치 및 방법Info
- Publication number
- WO2025178356A1 WO2025178356A1 PCT/KR2025/002372 KR2025002372W WO2025178356A1 WO 2025178356 A1 WO2025178356 A1 WO 2025178356A1 KR 2025002372 W KR2025002372 W KR 2025002372W WO 2025178356 A1 WO2025178356 A1 WO 2025178356A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- capacity
- battery
- batteries
- voltage
- ratio
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/13—Maintaining the SoC within a determined range
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/12—Measuring rate of change
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention provides a battery capacity estimation device and method for estimating the capacity of a battery using a non-destructive method.
- a battery capacity estimation device may include a measuring unit configured to measure a pack capacity of a battery pack and a voltage of each of a plurality of batteries included in the battery pack during a charging/discharging process; and a control unit configured to calculate a relative capacity ratio between the plurality of batteries based on a voltage section of each of the plurality of batteries, and to estimate a capacity of each of the plurality of batteries based on the pack capacity and the relative capacity ratio.
- the control unit may be configured to determine a voltage range of each of the plurality of batteries, adjust the determined plurality of voltage ranges to correspond to each other, calculate a change rate of each of the plurality of batteries, and calculate the relative capacity ratio for each of the plurality of batteries based on the calculated plurality of change rates.
- the control unit may be configured to set one of the plurality of voltage sections as a reference voltage section and adjust the plurality of voltage sections to correspond to the reference voltage section to calculate the plurality of change ratios.
- the control unit may be configured to set one of the plurality of change ratios as a reference change ratio, and calculate the relative capacity ratio for each of the plurality of batteries based on the plurality of change ratios and the reference change ratio.
- the control unit may be configured to calculate the ratio of the reference change ratio to each of the plurality of change ratios to obtain the relative capacity ratio for each of the plurality of batteries.
- the above control unit may be configured to set the largest value among the plurality of change ratios as the reference change ratio.
- the control unit may be configured to estimate the capacity of each of the plurality of batteries by multiplying the pack capacity and the relative capacity ratio.
- a battery pack according to another aspect of the present invention may include a battery capacity estimation device according to one aspect of the present invention.
- a vehicle according to another aspect of the present invention may include a battery capacity estimation device according to one aspect of the present invention.
- a battery capacity estimation method may include a measuring step of measuring a pack capacity of a battery pack and the voltage of each of a plurality of batteries included in the battery pack during a charging/discharging process; a relative capacity ratio calculation step of calculating a relative capacity ratio between the plurality of batteries based on a voltage section of each of the plurality of batteries; and a capacity estimation step of estimating the capacity of each of the plurality of batteries based on the pack capacity and the relative capacity ratio.
- a non-transitory computer-readable storage medium can store a program for executing a battery capacity estimation method, including a measuring step of measuring a pack capacity of a battery pack and a voltage of each of a plurality of batteries included in the battery pack during a charging/discharging process; a relative capacity ratio calculation step of calculating a relative capacity ratio between the plurality of batteries based on a voltage section of each of the plurality of batteries; and a capacity estimation step of estimating a capacity of each of the plurality of batteries based on the pack capacity and the relative capacity ratio.
- the capacity (maximum capacity) of each of the plurality of batteries can be accurately estimated.
- FIG. 1 is a schematic diagram illustrating a battery capacity estimation device according to one embodiment of the present invention.
- FIG. 2 is a diagram schematically illustrating the capacities of the first to third batteries according to one embodiment of the present invention.
- FIG. 3 is a drawing showing in more detail the capacities of the first to third batteries according to one embodiment of the present invention.
- FIG. 4 is a schematic drawing of a battery pack according to another embodiment of the present invention.
- FIG. 5 is a schematic drawing of a vehicle according to another embodiment of the present invention.
- FIG. 6 is a diagram schematically illustrating a battery capacity estimation method according to another embodiment of the present invention.
- FIG. 1 is a schematic diagram illustrating a battery capacity estimation device (100) according to one embodiment of the present invention.
- a battery capacity estimation device (100) may include a measuring unit (110) and a control unit (120).
- the measuring unit (110) may be configured to measure the pack capacity (Qp) of the battery pack and the voltage of each of the plurality of batteries included in the battery pack during the charging and discharging process.
- the measuring unit (110) is described below as measuring the pack capacity (Qp) of the battery pack and the voltage of each of the plurality of batteries during the charging process.
- a battery is a physically separate, independent cell with a positive and negative terminal.
- a lithium-ion battery or a lithium polymer battery may be considered a battery.
- Batteries may be cylindrical, prismatic, or pouch-shaped.
- the term "battery" will be used herein to refer to a single, independent cell.
- a battery pack may directly include a plurality of battery cells.
- a battery pack may include one or more battery banks and/or one or more battery modules, each of which includes a plurality of battery cells.
- a battery pack may be a battery bank or a battery module, each of which includes a plurality of battery cells.
- the term "battery pack" in this specification may be applied without limitation to any cell group that includes a plurality of battery cells.
- the plurality of batteries included in the battery pack may be configured to be connected in series and/or parallel with each other.
- the battery pack may include a plurality of batteries connected in series.
- the measuring unit (110) can calculate the charging current applied to the battery pack until the voltage (or SOC) of the battery pack reaches a preset charging start voltage (or charging start SOC) and a preset charging end voltage (or charging end SOC). In addition, the measuring unit (110) can calculate the pack capacity (Qp) of the battery pack by integrating the charging current calculated during the charging process.
- the measuring unit (110) can measure the first voltage and the second voltage of each of the plurality of batteries included in the battery pack.
- the first voltage is the voltage of each battery when charging of the battery pack begins
- the second voltage is the voltage of each battery when charging of the battery pack ends.
- FIG. 2 is a diagram schematically illustrating the capacities of first to third batteries (B1, B2, B3) according to one embodiment of the present invention.
- the first battery (B1), the second battery (B2), and the third battery (B3) are battery cells included in a specific battery pack and are connected in series with each other.
- the first voltage of the first battery (B1) is Vi1 [V], and the second voltage is Vf1 [V].
- the voltage of the first battery (B1) may increase from Vi1 [V] to Vf1 [V].
- the first voltage of the second battery (B2) is Vi2 [V]
- the second voltage is Vf2 [V].
- the first voltage of the third battery (B3) is Vi3 [V]
- the second voltage is Vf3 [V].
- the first to third batteries (B1, B2, B3) are connected in series with each other, so that the capacity of the first to third batteries (B1, B2, B3) is equal to the pack capacity (Qp) of the battery pack.
- the control unit (120) may be configured to calculate a relative capacity ratio between the plurality of batteries (B1, B2, B3) based on the voltage range of each of the plurality of batteries (B1, B2, B3).
- the control unit (120) may be configured to determine a voltage range of each of the plurality of batteries (B1, B2, B3).
- the voltage range refers to a voltage range of the battery while charging and discharging of the battery pack is in progress.
- the ranges of the first voltage and the second voltage correspond to the voltage ranges of the batteries.
- the voltage range of the first battery (B1) is Vi1[V] to Vf1[V]
- the voltage range of the second battery (B2) is Vi2[V] to Vf2[V]
- the voltage range of the third battery (B3) is Vi3[V] to Vf3[V].
- the control unit (120) can be configured to adjust a plurality of determined voltage sections to correspond to each other and calculate a change ratio of each of the plurality of batteries (B1, B2, B3).
- control unit (120) may be configured to set one of the voltage sections for each of the plurality of batteries (B1, B2, B3) as a reference voltage section.
- control unit (120) may be configured to calculate a change rate for each of the plurality of batteries (B1, B2, B3) by adjusting the plurality of voltage sections to correspond to the set reference voltage section.
- control unit (120) can adjust the first and second voltages of the plurality of voltage sections to correspond to the first and second voltages of the preset reference voltage section, and calculate the rate at which each of the plurality of voltage sections changes during the adjustment process.
- the rate of change is a scale factor of the voltage sections for the plurality of batteries (B1, B2, B3) with respect to the preset reference voltage section.
- control unit (120) calculates the change ratio of each of the plurality of batteries (B1, B2, B3).
- the control unit (120) may be configured to calculate a relative capacity ratio for each of the plurality of batteries (B1, B2, B3) based on the calculated plurality of change ratios.
- the relative capacity ratio represents the relative capacity ratio between the plurality of batteries (B1, B2, B3). For example, the larger the relative capacity ratio, the larger the capacity of the corresponding battery, and the smaller the relative capacity ratio, the smaller the capacity of the corresponding battery.
- control unit (120) may be configured to set any one of a plurality of change ratios as a reference change ratio (CSref).
- control unit (120) may be configured to calculate a relative capacity ratio for each of the plurality of batteries (B1, B2, B3) based on the plurality of change ratios and the preset reference change ratio (CSref).
- control unit (120) may be configured to calculate a ratio of a reference change ratio (CSref) to each of the change ratios of the plurality of batteries (B1, B2, B3) to produce a relative capacity ratio for each of the plurality of batteries.
- CSref a reference change ratio
- the plurality of batteries (B1, B2, B3) can be charged by the pack capacity (Qp) of the battery pack.
- the charge capacity of each of the plurality of batteries (B1, B2, B3) is the same.
- the capacity (maximum capacity) of each of the plurality of batteries (B1, B2, B3) may be different from each other. Therefore, the control unit (120) can estimate the maximum capacity of each of the plurality of batteries (B1, B2, B3) based on the pack capacity (Qp) and the relative capacity ratio.
- the battery capacity estimation device (100) can estimate the capacity (maximum capacity) of each of the plurality of batteries (B1, B2, B3) connected in series based on the pack capacity (Qp) and the relative capacity ratio.
- the battery capacity estimation device (100) has the advantage of being able to accurately estimate the capacity (maximum capacity) of each of the plurality of batteries (B1, B2, B3) even without individually charging and discharging the plurality of batteries (B1, B2, B3).
- the control unit (120) provided in the battery capacity estimation device (100) may optionally include a processor, an application-specific integrated circuit (ASIC), various chipsets, logic circuits, registers, communication modems, data processing devices, etc. known in the art to execute various control logics performed in the present invention.
- ASIC application-specific integrated circuit
- the control unit (120) may be implemented as a set of program modules.
- the program modules may be stored in a memory and executed by the control unit (120).
- the memory may be located inside or outside the control unit (120) and may be connected to the control unit (120) by various well-known means.
- the battery capacity estimation device (100) may further include a storage unit (130).
- the storage unit (130) may store data or programs required for each component of the battery capacity estimation device (100) to perform operations and functions, or data generated in the process of performing operations and functions.
- the storage unit (130) is not particularly limited in type as long as it is a known information storage means known to be capable of recording, erasing, updating, and reading data.
- the information storage means may include a RAM (Random Access Memory), a flash memory, a ROM (Read-Only Memory), an EEPROM (Electronically-Erasable Programmable Read-Only Memory), a register, etc.
- the storage unit (130) may store program codes defining processes executable by the control unit (120).
- information about the pack capacity (Qp) of the battery pack measured by the measuring unit (110) and the voltages of the plurality of batteries (B1, B2, B3) can be stored in the storage unit (130). Then, the control unit (120) can access the storage unit (130) and obtain information used to estimate the capacities of the plurality of batteries (B1, B2, B3).
- control unit (120) can calculate a change rate of each of the plurality of batteries (B1, B2, B3) by adjusting the sizes of the plurality of voltage sections to correspond to the sizes of the preset reference voltage sections.
- control unit (120) may be configured to calculate an interval value representing the size of each of a plurality of voltage intervals. For example, the control unit (120) may calculate the interval value of a voltage interval by calculating the difference between a first voltage and a second voltage of the voltage interval.
- control unit (120) can calculate the difference between the first voltage (Vi1) and the second voltage (Vf1) of the first battery (B1) and calculate the interval value as R1 [V].
- the control unit (120) can calculate the difference between the first voltage (Vi2) and the second voltage (Vf2) of the second battery (B2) and calculate the interval value as R2 [V].
- the control unit (120) can calculate the difference between the first voltage (Vi3) and the second voltage (Vf3) of the third battery (B3) and calculate the interval value as R3 [V].
- the reference interval value of the reference voltage interval is greater than the interval value of the first voltage interval, less than the interval value of the second voltage interval, and equal to the third voltage interval. Since the interval value of the first voltage interval must increase to correspond to the reference interval value of the reference voltage interval, the change ratio of the first voltage interval may exceed 100%. In addition, since the interval value of the second voltage interval must decrease to correspond to the reference interval value of the reference voltage interval, the change ratio of the second voltage interval may be less than 100%. In addition, since the interval value of the third voltage interval is equal to the reference interval value of the reference voltage interval, the change ratio of the third voltage interval is 100%.
- control unit (120) can calculate the change ratio of the first battery (B1) as CS1[%] by calculating the formula “R1 ⁇ Rref”, calculate the change ratio of the second battery (B2) as CS2[%] by calculating the formula “R2 ⁇ Rref”, and calculate the change ratio of the third battery (B3) as CS3[%] by calculating the formula “R3 ⁇ Rref”.
- control unit (120) calculates the relative capacity ratio of multiple batteries.
- the control unit (120) may be configured to set the largest value among multiple change ratios as the reference change ratio (CSref).
- Charging of a battery pack ends when the most degraded battery among the multiple batteries is fully charged.
- the pack capacity (Qp) of the battery pack corresponds to the capacity of the most degraded battery among the multiple batteries.
- the charging of the most degraded battery is completed first, so the section value and change rate of the most degraded battery are greater than those of other batteries.
- control unit (120) can set the largest value among the multiple change ratios as the reference change ratio (CSref).
- control unit (120) can calculate the ratio of the reference change ratio (CSref) to the change ratio of each of the plurality of batteries, thereby calculating the relative capacity ratio of each of the plurality of batteries.
- a battery capacity estimation device (100) can estimate the capacity of each remaining battery based on the capacity of the most degraded battery (pack capacity (Qp)) by setting the largest value among multiple change rates as a reference change rate (CSref). In this way, the battery capacity estimation device (100) has the advantage of being able to accurately estimate the capacity of multiple batteries by taking into account the charge/discharge characteristics of batteries connected in series.
- FIG. 3 is a drawing showing in more detail the capacities of the first to third batteries (B1, B2, B3) according to one embodiment of the present invention.
- the first voltage of the first battery (B1) is 3 [V]
- the second voltage is 4.17 [V]
- the interval value is 1.17 [V].
- the first voltage of the second battery (B2) is 3 [V]
- the second voltage is 4.2 [V]
- the interval value is 1.2 [V].
- the first voltage of the third battery (B3) is 3 [V]
- the second voltage is 4.19 [V]
- the interval value is 1.19 [V].
- the pack capacity (Qp) of the battery pack is 13,165 mAh.
- the control unit (120) sets the section value (1.17 [V]) of the first battery (B1) among the section values of the first to third batteries (B1, B2, B3) as the reference section value (Rref), and calculates the ratio of each section value to the reference section value (Rref) to calculate the change ratio of the first to third batteries (B1, B2, B3).
- the reference section value (Rref) is arbitrarily set among the section values of the first to third batteries (B1, B2, B3), and may be set as the section value of the second battery (B2) or the section value of the third battery (B3).
- control unit (120) can calculate the formula "1.17 ⁇ 1.17” to calculate the change ratio of the first battery (B1) as 100%.
- the control unit (120) can calculate the formula "1.2 ⁇ 1.17” to calculate the change ratio of the second battery (B2) as 102.56%.
- the control unit (120) can calculate the formula "1.19 ⁇ 1.17” to calculate the change ratio of the third battery (B3) as 101.71%.
- control unit (120) sets the change ratio of the second battery (B2) as the reference change ratio (CSref) because the change ratio of the second battery (B2) is the largest at 102.56%, and calculates the ratio of the reference change ratio (CSref) for each change ratio to calculate the relative capacity ratio of the first to third batteries (B1, B2, B3).
- control unit (120) can calculate the formula of "102.56 ⁇ 100” to calculate the relative capacity ratio of the first battery (B1) as 102.56%, and can calculate the formula of "102.56 ⁇ 102.56” to calculate the relative capacity ratio of the second battery (B2) as 100[%].
- the control unit (120) can calculate the formula of "102.56 ⁇ 101.71” to calculate the relative capacity ratio of the third battery (B3) as 100.84%.
- the capacity of the first battery (B1) is 2.56% larger than the capacity of the second battery (B2)
- the capacity of the third battery (B3) is 0.84% larger than the capacity of the second battery (B2).
- the control unit (120) can calculate the capacity of each of the plurality of batteries by multiplying the pack capacity (Qp) of 13,165 mAh by the relative capacity ratio of each of the plurality of batteries.
- control unit (120) can calculate the formula "13,165 ⁇ 102.56%” to calculate the capacity of the first battery (B1) as 13,502.6 mAh.
- control unit (120) can calculate the formula "13,165 ⁇ 100%” to calculate the capacity of the second battery (B2) as 13,165 mAh.
- the control unit (120) can calculate the formula "13,165 ⁇ 100.84%" to calculate the capacity of the third battery (B3) as 13,275.6 mAh.
- the battery capacity estimation device (100) according to the present invention can be applied to a BMS (Battery Management System).
- the BMS according to the present invention can include the battery capacity estimation device (100) described above.
- at least some of the components of the battery capacity estimation device (100) can be implemented by supplementing or adding to the functions of the components included in a conventional BMS.
- the measurement unit (110), control unit (120), and storage unit (130) of the battery capacity estimation device (100) can be implemented as components of the BMS.
- the battery capacity estimation device (100) according to the present invention may be installed in a battery pack.
- the battery pack according to the present invention may include the battery capacity estimation device (100) described above and one or more battery cells.
- the battery pack may further include electrical components (relays, fuses, etc.) and a case.
- FIG. 4 is a schematic drawing of a battery pack (10) according to another embodiment of the present invention.
- the battery pack (10) may include a plurality of batteries (B).
- the plurality of batteries (B) include a first battery (B1), a second battery (B2), and a third battery (B3).
- the first battery (B1), the second battery (B2), and the third battery (B3) may be connected in series with each other.
- the positive terminal of the first battery (B1) can be connected to the positive terminal (P+) of the battery pack (10), and the negative terminal of the third battery (B3) can be connected to the negative terminal (P-) of the battery pack (10).
- the measuring unit (110) can be connected to the first to fifth sensing lines (SL1 to SL5).
- the measuring unit (110) can measure the voltage of the first battery (B1) through the first sensing line (SL1) and the second sensing line (SL2).
- the measuring unit (110) can measure the voltage of the second battery (B2) through the second sensing line (SL2) and the third sensing line (SL3).
- the measuring unit (110) can measure the voltage of the third battery (B3) through the third sensing line (SL3) and the fourth sensing line (SL4).
- the measuring unit (110) can be connected to the current measuring unit (A) through the fifth sensing line (SL5).
- the current measuring unit (A) can be an ammeter or a shunt resistor capable of measuring the charging current and the discharging current of the plurality of batteries (B).
- the measuring unit (110) can measure the charging current of the plurality of batteries (B) through the fifth sensing line (SL5) to calculate the charging amount.
- the measuring unit (110) can measure the discharging current of the plurality of batteries (B) through the fifth sensing line (SL5) to calculate the discharging amount.
- FIG. 5 is a schematic drawing of a vehicle (500) according to another embodiment of the present invention.
- FIG. 6 is a diagram schematically illustrating a battery capacity estimation method according to another embodiment of the present invention.
- Each step of the battery capacity estimation method of the present invention can be performed by the battery capacity estimation device (100).
- the battery capacity estimation device 100.
- any content that overlaps with the previously described content will be omitted or briefly described.
- the control unit (120) may be configured to estimate the capacity of each of the plurality of batteries (B1, B2, B3) by multiplying the pack capacity (Qp) and the relative capacity ratio of each battery.
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
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- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims (13)
- 충방전 과정에서 배터리 팩의 팩 용량 및 상기 배터리 팩에 포함된 복수의 배터리 각각의 전압을 측정하도록 구성된 측정부; 및상기 복수의 배터리 각각의 전압 구간에 기반하여 상기 복수의 배터리 간의 상대 용량 비율을 산출하고, 상기 팩 용량과 상기 상대 용량 비율에 따라 상기 복수의 배터리 각각의 용량을 추정하도록 구성된 제어부를 포함하는 배터리 용량 추정 장치.
- 제1항에 있어서,상기 제어부는,상기 복수의 배터리 각각의 전압 구간을 결정하고, 결정된 복수의 전압 구간을 서로 대응되도록 조정하여 상기 복수의 배터리 각각의 변경 비율을 산출하며, 산출된 복수의 변경 비율에 기반하여 상기 복수의 배터리 각각에 대한 상기 상대 용량 비율을 산출하도록 구성된 배터리 용량 추정 장치.
- 제2항에 있어서,상기 제어부는,상기 복수의 전압 구간 중 어느 하나를 기준 전압 구간으로 설정하고, 상기 복수의 전압 구간을 상기 기준 전압 구간에 대응되도록 조정하여 상기 복수의 변경 비율을 산출하도록 구성된 배터리 용량 추정 장치.
- 제3항에 있어서,상기 제어부는,상기 복수의 전압 구간 각각의 크기를 나타내는 구간값을 산출하고, 상기 복수의 전압 구간 각각의 구간값에 대한 상기 기준 전압 구간의 구간값의 비율을 계산하여 상기 복수의 변경 비율을 산출하도록 구성된 배터리 용량 추정 장치.
- 제2항에 있어서,상기 제어부는,상기 복수의 변경 비율 중 어느 하나를 기준 변경 비율로 설정하고, 상기 복수의 변경 비율과 상기 기준 변경 비율에 기반하여 상기 복수의 배터리 각각에 대한 상기 상대 용량 비율을 산출하도록 구성된 배터리 용량 추정 장치.
- 제5항에 있어서,상기 제어부는,상기 복수의 변경 비율 각각에 대한 상기 기준 변경 비율의 비율을 계산하여 상기 복수의 배터리 각각에 대한 상기 상대 용량 비율을 산출하도록 구성된 배터리 용량 추정 장치.
- 제5항에 있어서,상기 제어부는,상기 복수의 변경 비율 중에서 가장 큰 값을 상기 기준 변경 비율로 설정하도록 구성된 배터리 용량 추정 장치.
- 제1항에 있어서,상기 제어부는,상기 팩 용량과 상기 상대 용량 비율을 곱하여 상기 복수의 배터리 각각의 용량을 추정하도록 구성된 배터리 용량 추정 장치.
- 제1항에 있어서,상기 복수의 배터리는,서로 직렬로 연결되도록 구성된 배터리 용량 추정 장치.
- 제1항 내지 제9항 중 어느 한 항에 따른 배터리 용량 추정 장치를 포함하는 배터리 팩.
- 제1항 내지 제9항 중 어느 한 항에 따른 배터리 용량 추정 장치를 포함하는 자동차.
- 충방전 과정에서 배터리 팩의 팩 용량 및 상기 배터리 팩에 포함된 복수의 배터리 각각의 전압을 측정하는 측정 단계;상기 복수의 배터리 각각의 전압 구간에 기반하여 상기 복수의 배터리 간의 상대 용량 비율을 산출하는 상대 용량 비율 산출 단계; 및상기 팩 용량과 상기 상대 용량 비율에 따라 상기 복수의 배터리 각각의 용량을 추정하는 용량 추정 단계를 포함하는 배터리 용량 추정 방법.
- 충방전 과정에서 배터리 팩의 팩 용량 및 상기 배터리 팩에 포함된 복수의 배터리 각각의 전압을 측정하는 측정 단계;상기 복수의 배터리 각각의 전압 구간에 기반하여 상기 복수의 배터리 간의 상대 용량 비율을 산출하는 상대 용량 비율 산출 단계; 및상기 팩 용량과 상기 상대 용량 비율에 따라 상기 복수의 배터리 각각의 용량을 추정하는 용량 추정 단계를 포함하는 배터리 용량 추정 방법을 실행하기 위한 프로그램이 저장된 비일시적 컴퓨터 판독가능 저장 매체.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202580002534.4A CN121100287A (zh) | 2024-02-21 | 2025-02-19 | 用于估计电池的容量的装置和方法 |
| EP25758439.1A EP4741850A1 (en) | 2024-02-21 | 2025-02-19 | Apparatus and method for estimating capacity of battery |
| US19/060,347 US20250264539A1 (en) | 2024-02-21 | 2025-02-21 | Apparatus and method for estimating capacity of battery |
| MX2026002706A MX2026002706A (es) | 2024-02-21 | 2026-03-06 | Aparato y metodo para estimar la capacidad de baterias |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2024-0025269 | 2024-02-21 | ||
| KR1020240025269A KR20250128724A (ko) | 2024-02-21 | 2024-02-21 | 배터리 용량 추정 장치 및 방법 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025178356A1 true WO2025178356A1 (ko) | 2025-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2025/002372 Pending WO2025178356A1 (ko) | 2024-02-21 | 2025-02-19 | 배터리 용량 추정 장치 및 방법 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250264539A1 (ko) |
| EP (1) | EP4741850A1 (ko) |
| KR (1) | KR20250128724A (ko) |
| CN (1) | CN121100287A (ko) |
| MX (1) | MX2026002706A (ko) |
| WO (1) | WO2025178356A1 (ko) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017006319A1 (en) * | 2015-07-08 | 2017-01-12 | Algolion Ltd. | Lithium-ion battery safety monitoring |
| JP2021027031A (ja) * | 2019-08-01 | 2021-02-22 | 株式会社デンソー | 二次電池の劣化度判定装置及び組電池 |
| KR20210031226A (ko) * | 2019-09-11 | 2021-03-19 | 주식회사 엘지화학 | 배터리 관리 장치 및 방법 |
| US20210349150A1 (en) * | 2018-10-03 | 2021-11-11 | O2Micro, Inc. | Predicting a potential fault in a battery |
| KR20230021499A (ko) * | 2021-08-05 | 2023-02-14 | 삼성에스디아이 주식회사 | 배터리의 상대 충전 상태를 산출하는 방법 및 장치 |
| KR20240025269A (ko) | 2022-08-18 | 2024-02-27 | 엘지전자 주식회사 | 의류처리장치 및 의류처리장치의 제어방법 |
-
2024
- 2024-02-21 KR KR1020240025269A patent/KR20250128724A/ko active Pending
-
2025
- 2025-02-19 WO PCT/KR2025/002372 patent/WO2025178356A1/ko active Pending
- 2025-02-19 EP EP25758439.1A patent/EP4741850A1/en active Pending
- 2025-02-19 CN CN202580002534.4A patent/CN121100287A/zh active Pending
- 2025-02-21 US US19/060,347 patent/US20250264539A1/en active Pending
-
2026
- 2026-03-06 MX MX2026002706A patent/MX2026002706A/es unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017006319A1 (en) * | 2015-07-08 | 2017-01-12 | Algolion Ltd. | Lithium-ion battery safety monitoring |
| US20210349150A1 (en) * | 2018-10-03 | 2021-11-11 | O2Micro, Inc. | Predicting a potential fault in a battery |
| JP2021027031A (ja) * | 2019-08-01 | 2021-02-22 | 株式会社デンソー | 二次電池の劣化度判定装置及び組電池 |
| KR20210031226A (ko) * | 2019-09-11 | 2021-03-19 | 주식회사 엘지화학 | 배터리 관리 장치 및 방법 |
| KR20230021499A (ko) * | 2021-08-05 | 2023-02-14 | 삼성에스디아이 주식회사 | 배터리의 상대 충전 상태를 산출하는 방법 및 장치 |
| KR20240025269A (ko) | 2022-08-18 | 2024-02-27 | 엘지전자 주식회사 | 의류처리장치 및 의류처리장치의 제어방법 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4741850A1 (en) | 2026-05-13 |
| MX2026002706A (es) | 2026-04-01 |
| US20250264539A1 (en) | 2025-08-21 |
| CN121100287A (zh) | 2025-12-09 |
| KR20250128724A (ko) | 2025-08-28 |
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