WO2025165136A1 - 배터리 프로파일 생성 장치 및 방법 - Google Patents
배터리 프로파일 생성 장치 및 방법Info
- Publication number
- WO2025165136A1 WO2025165136A1 PCT/KR2025/001545 KR2025001545W WO2025165136A1 WO 2025165136 A1 WO2025165136 A1 WO 2025165136A1 KR 2025001545 W KR2025001545 W KR 2025001545W WO 2025165136 A1 WO2025165136 A1 WO 2025165136A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- temperature
- rate
- target
- profile
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—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
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/005—Circuits arrangements for indicating a predetermined temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—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
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- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- 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
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- 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
- H01M10/46—Accumulators structurally combined with charging 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
-
- 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
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a battery profile generation device and method.
- lithium batteries are receiving attention for their advantages of being able to charge and discharge freely, having a very low self-discharge rate, and having a high energy density, as they have almost no memory effect compared to nickel-based batteries.
- One way to diagnose a battery's condition is to analyze its battery profile, which represents its charge/discharge characteristics. For example, the battery's capacity and voltage are measured during the charging process, and the battery profile, which indicates the relationship between the measured capacities and voltages, is analyzed to diagnose the battery's condition.
- a battery profile that accurately reflects its condition is required.
- Obtaining such a battery profile requires low-rate charging/discharging, such as 0.05C (C-rate). For example, if the battery is charged/discharged at a rate exceeding 0.33C, the resulting battery profile may include overpotential, which may not accurately reflect the battery's current condition.
- the present invention has been devised to solve the above problems, and its purpose is to provide a battery profile generation device and method that can more quickly generate a battery profile that more accurately reflects the state of a battery.
- a battery profile generating device may include: a charging/discharging unit configured to charge/discharge a battery; a measuring unit configured to measure battery information including at least one of a voltage, a current, and a temperature of the battery during a charging/discharging process of the battery; and a control unit configured to determine a target temperature and a target C-rate corresponding to a charging/discharging condition based on a reference profile preset to indicate a correspondence between a threshold temperature and a threshold C-rate (Current-rate), control the charging/discharging unit to charge/discharge the battery at the target C-rate when the temperature of the battery corresponds to the target temperature, and generate a battery profile corresponding to the battery based on the battery information.
- a charging/discharging unit configured to charge/discharge a battery
- a measuring unit configured to measure battery information including at least one of a voltage, a current, and a temperature of the battery during a charging/discharging process of the battery
- the above charging and discharging conditions can be set to include the target temperature.
- the above control unit may be configured to determine the threshold C-rate corresponding to the target temperature in the reference profile as the target C-rate.
- the control unit may be configured to determine a minimum C-rate, a maximum C-rate, or an intermediate C-rate among one or more critical C-rates whose corresponding critical temperature in the reference profile is lower than the target temperature as the target C-rate.
- the above charging and discharging conditions can be set to include the target C-rate.
- the above control unit may be configured to determine the threshold temperature corresponding to the target C-rate in the reference profile as the target temperature.
- the control unit may be configured to select one or more critical temperatures in the reference profile whose corresponding critical C-rate is greater than the target C-rate, and determine a minimum temperature, a maximum temperature, or an intermediate temperature among the selected one or more critical temperatures as the target temperature.
- the above charging and discharging conditions can be set to include the target temperature and the target C-rate.
- the control unit may be configured to determine suitability for charging and discharging based on the target temperature and the target C-rate based on the reference profile, and to control the charging and discharging unit so that the battery is charged and discharged if the charging and discharging is determined to be suitable.
- the control unit may be configured to determine the critical C-rate corresponding to the target temperature in the reference profile as a reference C-rate, and determine that the charging and discharging is appropriate if the reference C-rate is equal to or greater than the target C-rate.
- the control unit may be configured to determine the threshold temperature corresponding to the target C-rate in the reference profile as a reference temperature, and determine that the charging and discharging is appropriate if the reference temperature is lower than or equal to the target temperature.
- It may further include a temperature control unit configured to control the temperature of the battery.
- the control unit may be configured to control the temperature control unit until the temperature of the battery reaches the target temperature if the target temperature and the temperature of the battery do not correspond.
- the above control unit may be configured to provide information about the battery by outputting the battery profile to the outside.
- a battery pack according to another aspect of the present invention may include a battery profile generating device according to one aspect of the present invention.
- a diagnostic device may include a battery profile generation device according to one aspect of the present invention.
- a method for generating a battery profile may include: determining a target temperature and a target C-rate corresponding to a charge/discharge condition based on a reference profile preset to indicate a correspondence between a critical temperature and a critical C-rate; controlling a charge/discharge unit to charge/discharge the battery at the target C-rate when the temperature of the battery corresponds to the target temperature; and generating a battery profile corresponding to the battery based on battery information including at least one of a voltage, a current, and a temperature of the battery.
- a program for executing a battery profile generation method may be stored in a non-transitory computer-readable storage medium, the method comprising: determining a target temperature and a target C-rate corresponding to a charge/discharge condition based on a reference profile preset to indicate a correspondence between a critical temperature and a critical C-rate; controlling a charging/discharging unit to charge/discharge the battery at the target C-rate when the temperature of the battery corresponds to the target temperature; and generating a battery profile corresponding to the battery based on battery information including at least one of a voltage, a current, and a temperature of the battery.
- a battery profile generation device can shorten the time required to generate a battery profile and improve the accuracy of the battery profile by determining a target temperature and a target C-rate that correspond to each other.
- FIG. 1 is a schematic diagram illustrating a battery profile generation device according to one embodiment of the present invention.
- Figure 2 is a schematic diagram illustrating an example of a reference profile.
- Figure 3 is a schematic diagram illustrating an example of a reference differential profile.
- Figure 4 is a schematic diagram illustrating another example of a reference differential profile.
- Figure 5 is a schematic diagram illustrating another example of a reference differential profile.
- FIG. 6 is a drawing illustrating an exemplary configuration of a battery pack according to another embodiment of the present invention.
- FIG. 7 is a diagram schematically illustrating a battery profile generation method according to another embodiment of the present invention.
- FIG. 1 is a schematic diagram illustrating a battery profile generation device (100) according to one embodiment of the present invention.
- the battery profile generation device (100) includes a charging/discharging unit (110), a measuring unit (120), and a control unit (130), and may further include a temperature control unit (140).
- a battery refers to a physically separate, independent cell having a negative terminal and a positive terminal.
- a lithium-ion battery or a lithium polymer battery may be considered a battery.
- the battery may be of a cylindrical type, a prismatic type, or a pouch type.
- a battery may also refer to a battery bank, a battery module, or a battery pack in which multiple cells are connected in series and/or parallel.
- the term "battery" will be described herein below as referring to a single, independent cell.
- the charging/discharging unit (110) may be configured to charge/discharge the battery. Specifically, the charging/discharging unit (110) may be electrically connected to the positive and negative terminals of the battery to charge or discharge the battery.
- the charging/discharging unit (110) may be configured to receive a control signal including target C-rate information.
- the charging/discharging unit (110) may be connected to the control unit (130) to enable wired and/or wireless communication.
- the wired communication may be, for example, CAN (controller area network) communication or CAN-FD (CAN with Flexible Data rate) communication.
- the wireless communication may be, for example, Zigbee or Bluetooth communication.
- the control unit (130) may transmit a control signal including the target C-rate to the charging/discharging unit (110).
- the charging/discharging unit (110) may receive the control signal from the control unit (130).
- the target C-rate information included in the control signal may be set by the control unit (130) or may be set by a user input.
- the charge/discharge unit (110) may be configured to charge/discharge the battery at a target C-rate included in the control signal. For example, if the target C-rate included in the control signal is 0.2C, the charge/discharge unit (110) may charge the battery at a C-rate of 0.2C or discharge the battery at a C-rate of 0.2C.
- the measuring unit (120) may be configured to measure battery information including at least one of the voltage, current, and temperature of the battery during the charging and discharging process of the battery.
- the measuring unit (120) may include a voltage detection circuit.
- the voltage detection circuit is provided to be electrically connectable to the positive and negative terminals of the battery.
- the voltage detection circuit can detect the voltage across both terminals of the battery by utilizing the potential difference between a pair of sensing lines respectively connected to the positive and negative terminals of the battery. In other words, the measuring unit (120) can measure the voltage of the battery included in the battery information through the voltage detection circuit.
- the measuring unit (120) may include a current detection circuit.
- the current detection circuit may be connected in series with the battery through a current path between the battery and the charging/discharging unit (110). That is, the current detection circuit may be connected in series with the battery and the charging/discharging unit (110).
- the current detection circuit may be implemented with one or a combination of two or more of known current detection elements, such as a shunt resistor, a Hall effect element, etc.
- the measuring unit (120) may measure the charging current of the battery through the current detection circuit to calculate the charging amount.
- the measuring unit (120) may measure the discharging current of the battery through the current detection circuit to calculate the discharging amount. That is, the measuring unit (120) may measure the current of the battery included in the battery information through the current detection circuit.
- the measuring unit (120) may include a temperature sensor.
- the temperature sensor may be directly attached to the battery's exterior or may be positioned at a predetermined distance from the battery. That is, the measuring unit (120) may measure the battery temperature included in the battery information through the temperature sensor.
- the measuring unit (120) may be connected to the control unit (130) so as to be able to communicate with it.
- the measuring unit (120) may be connected to the control unit (130) by wire and/or wirelessly.
- the wired communication may be, for example, CAN (controller area network) communication or CAN-FD (CAN with Flexible Data rate) communication.
- the wireless communication may be, for example, Zigbee or Bluetooth communication.
- the measuring unit (120) may transmit measured battery information to the control unit (130).
- the control unit (130) may receive battery information from the measuring unit (120).
- the control unit (130) may be configured to determine a target temperature and a target C-rate corresponding to the charge/discharge conditions based on a reference profile preset to indicate a correspondence between the critical temperature and the critical C-rate.
- Figure 2 is a schematic diagram illustrating an example of a reference profile.
- the first row represents the critical temperature (°C)
- the second row represents the critical C-rate.
- the critical temperature and critical C-rate can exhibit a proportional relationship. That is, as the critical temperature increases, the corresponding critical C-rate can also increase. Furthermore, as the critical C-rate increases, the corresponding critical temperature can also increase.
- the charge/discharge conditions can be set to include a target temperature.
- the control unit (130) can determine the target C-rate based on the target temperature and reference profile included in the charge/discharge conditions. That is, when only the target temperature is set as the charge/discharge condition, the control unit (130) can determine the target C-rate based on the reference profile and set the charge/discharge conditions for the battery.
- control unit (130) may be configured to determine a threshold C-rate corresponding to a target temperature in the reference profile as the target C-rate.
- control unit (130) when the target temperature included in the charge/discharge conditions is T4, the control unit (130) can determine the critical C-rate (0.2C) corresponding to the target temperature (T4) in the reference profile as the target C-rate.
- control unit (130) may be configured to select one or more critical C-rates in the reference profile whose corresponding critical temperature is less than the target temperature, and determine a minimum C-rate, a maximum C-rate, or an intermediate C-rate among the selected one or more critical C-rates as the target C-rate.
- the median C-rate may represent the average of one or more selected critical C-rates.
- the median C-rate may represent the median of one or more selected critical C-rates.
- the control unit (130) can select one or more critical C-rates (0.05C, 0.1C, and 0.13C) whose corresponding critical temperatures are lower than the target temperature (T4) in the reference profile. Then, the control unit (130) can determine the minimum C-rate (0.05C), maximum C-rate (0.13C), or intermediate C-rate (i.e., (0.05+0.1C+0.13C)) among the selected critical C-rates (0.05C, 0.1C, 0.13C) as the target C-rate.
- the charge/discharge conditions can be set to include a target C-rate.
- the control unit (130) can determine the target temperature based on the target C-rate and reference profile included in the charge/discharge conditions. That is, when only the target C-rate is set as the charge/discharge condition, the control unit (130) can determine the target temperature based on the reference profile and set the charge/discharge conditions for the battery.
- control unit (130) may be configured to determine a threshold temperature corresponding to the target C-rate in the reference profile as the target temperature.
- the control unit (130) can determine the critical temperature (T4) corresponding to the target C-rate (0.2C) in the reference profile as the target temperature.
- control unit (130) may be configured to select one or more critical temperatures whose corresponding critical C-rate is greater than the target C-rate in the reference profile, and determine a minimum temperature, a maximum temperature, or an intermediate temperature among the selected one or more critical temperatures as the target temperature.
- the median temperature may represent the average of one or more selected critical temperatures.
- the median temperature may represent the median of one or more selected critical temperatures.
- the control unit (130) can select one or more critical temperatures (T5 and T6) in the reference profile whose corresponding critical C-rate is greater than the target C-rate (0.2 C). Then, the control unit (130) can determine the minimum temperature (T5), maximum temperature (T6), or intermediate temperature (i.e., (T5+T6) ⁇ 2) among the selected critical temperatures (T5 and T6) as the target temperature.
- the control unit (130) may be configured to control the charge/discharge unit (110) to charge/discharge the battery at a target C-rate when the temperature of the battery corresponds to the target temperature.
- control unit (130) can control the charge/discharge unit (110) to charge/discharge the battery at the target C-rate included in the charge/discharge conditions.
- control unit (130) can transmit a control signal including charge and discharge conditions to the charge and discharge unit (110).
- the charge and discharge unit (110) can be configured to charge and discharge the battery at a target C-rate among the charge and discharge conditions included in the received control signal.
- the control unit (130) may be configured to generate a battery profile corresponding to the battery based on battery information.
- the parameters that constitute the battery profile are not limited.
- a battery profile may be a profile that indicates the correspondence between the voltage and capacity of a battery included in the battery information.
- a battery profile may be a profile that represents a corresponding relationship between at least two of the voltage, capacity, and resistance of the battery.
- charging and discharging at a low C-rate such as 0.05C
- 0.05C provides the most accurate representation of the battery's current condition.
- charging and discharging at 0.05C can take approximately 20 hours, making it a significant time-consuming process to generate a battery profile.
- a battery profile generation device (100) can shorten the time required to generate a battery profile and improve the accuracy of the battery profile by determining a target temperature and a target C-rate that correspond to each other.
- control unit (130) provided in the battery profile generation device (100) may optionally include a processor, an application-specific integrated circuit (ASIC), another chipset, a logic circuit, a register, a communication modem, a data processing device, etc. known in the art to execute various control logics performed in the present invention.
- control logic when the control logic is implemented in software, the control unit (130) may be implemented as a set of program modules.
- the program modules may be stored in a memory and executed by the control unit (130).
- the memory may be located inside or outside the battery profile generation device (100) and may be connected to the control unit (130) by various well-known means.
- the battery profile generation device (100) may further include a storage unit (150).
- the storage unit (150) may store data or programs required for each component of the battery profile generation device (100) to perform operations and functions, or data generated in the process of performing operations and functions.
- the storage unit (150) 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 deriving 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 (150) may store program codes defining processes executable by the control unit (130).
- the storage unit (150) can store information necessary for the control unit (130) to determine the target temperature and target C-rate.
- the storage unit (150) can store battery information, reference profiles, etc.
- the control unit (130) can access the storage unit (150) to obtain necessary information.
- a reference profile can be obtained by analyzing a reference differential profile for a reference battery.
- Fig. 3 is a drawing schematically illustrating an example of a reference differential profile
- Fig. 4 is a drawing schematically illustrating another example of a reference differential profile
- Fig. 5 is a drawing schematically illustrating another example of a reference differential profile.
- the horizontal axis represents SOC (State of Charge, %)
- the vertical axis represents voltage (Voltage, V).
- the reference battery may be a battery preset to correspond to the battery being studied in the present invention.
- the reference battery may be a battery with the same specifications as the battery being studied.
- the reference battery may be a battery in the Beginning of Life (BoL) state.
- the reference differential profile may be a profile that represents the relationship between the voltage and capacity of a battery, differentiated with respect to voltage.
- the reference differential profile may be represented as a graph in which the X-axis is voltage (V) and the Y-axis is the differential capacity (dQ/dV).
- the reference differential profile may be a profile that represents the relationship between the voltage and capacity of a battery, differentiated with respect to capacity.
- the reference differential profile may be represented as a graph in which the X-axis represents capacity (Q) and the Y-axis represents the differential voltage (dV/dQ).
- a reference profile can be obtained based on the presence or absence of a peak in the region of interest of the reference differential profile.
- the region of interest may be predetermined. Specifically, the region of interest may be predetermined based on the characteristics of the battery.
- the region of interest may be predetermined based on the characteristics of the positive or negative electrode of the battery.
- the region of interest may be a SOC range or voltage range where specific peaks representing the characteristics of the positive or negative electrode of the battery exist.
- the region of interest may be predetermined based on the type or number of electrode active materials, etc.
- the region of interest may be a SOC range and a voltage range where a specific peak representing the characteristics of the electrode active material exists.
- the region of interest may be predetermined based on the capacity development range of each active material included in the electrode of the battery.
- the region of interest may be a predetermined SOC range (e.g., a 40% to 60% SOC range).
- the region of interest may be a predetermined voltage range (e.g., a 3.7 V to 3.9 V range).
- a peak can refer to a maximum or minimum point in a reference differential profile.
- a peak can refer to an inflection point in a profile that represents the corresponding relationship between the charge and discharge characteristics of a battery.
- the reference differential profile (R1) is a profile obtained when the reference battery is charged and discharged under the charge and discharge conditions (25°C, 0.2C).
- the reference differential profile (R2) is a profile obtained when the reference battery is charged and discharged under the charge and discharge conditions (45°C, 0.2C).
- the reference differential profile (R3) is a profile obtained when the reference battery is charged and discharged under the charge and discharge conditions (25°C, 0.13C).
- a peak in a given region of interest within a reference differential profile may appear when the battery temperature is increased while maintaining the charge/discharge C-rate.
- a peak in a given region of interest within a reference differential profile may appear when the battery temperature is maintained while decreasing the charge/discharge C-rate.
- the region of interest may be a range from SOC 40% to SOC 60%.
- a peak (Pk2) within the region of interest exists on the reference differential profile (R2).
- a peak (Pk3) within the region of interest exists on the reference differential profile (R3).
- the critical C-rate corresponding to the critical temperature of the reference profile may refer to the maximum C-rate at which a peak exists within the region of interest of the reference differential profile when the temperature of the battery is the critical temperature.
- the peak within the region of interest of the reference differential profile may not exist.
- the peak within the region of interest of the reference differential profile may exist.
- the critical temperature corresponding to the critical C-rate of the reference profile may refer to the minimum temperature at which a peak exists within the region of interest of the reference derivative profile when the battery is charged and discharged at the critical C-rate. That is, when the temperature of the battery is the critical temperature, if the battery is charged and discharged at a C-rate lower than the critical C-rate, a peak may exist within the region of interest of the reference derivative profile. Conversely, when the temperature of the battery is the critical temperature, if the battery is charged and discharged at a C-rate higher than the critical C-rate, a peak may not exist within the region of interest of the reference derivative profile.
- the charge/discharge conditions can be set to include a target temperature and a target C-rate.
- the control unit (130) may be configured to determine suitability for charging and discharging based on a reference profile according to a target temperature and target C-rate. If charging and discharging are determined to be suitable, the control unit (130) may control the charging and discharging unit (110) to charge and discharge the battery.
- the statement that charge/discharge at the target temperature and target C-rate is appropriate may mean that it is appropriate to generate a battery profile during the charge/discharge process under the corresponding charge/discharge conditions. Conversely, the statement that charge/discharge at the target temperature and target C-rate is not appropriate may mean that it is not appropriate to generate a battery profile during the charge/discharge process under the corresponding charge/discharge conditions.
- the control unit (130) can control the charge and discharge unit (110) so that the battery is charged and discharged at the target temperature and target C-rate. Conversely, if it is determined that charging and discharging is not appropriate, the control unit (130) can control the charge and discharge unit (110) so that the battery is not charged and discharged. That is, if it is determined that charging and discharging according to the target temperature and target C-rate is not appropriate, the control unit (130) can control the charge and discharge unit (110) so that the battery is not charged and discharged.
- the control unit (130) may be configured to determine a critical C-rate corresponding to a target temperature in the reference profile as a reference C-rate, and determine that charging and discharging are appropriate if the reference C-rate is equal to or greater than the target C-rate. Conversely, if the reference C-rate is less than the target C-rate, the control unit (130) may determine that charging and discharging under the set charging and discharging conditions are not appropriate.
- the reference C-rate is a critical C-rate corresponding to the target temperature, and may mean the maximum C-rate at which a peak may exist within the region of interest of the reference differential profile when the temperature of the battery is the target temperature.
- control unit (130) may determine that charge/discharge according to the target temperature and target C-rate is appropriate.
- control unit (130) may determine that charge/discharge at the target temperature and target C-rate is not appropriate.
- the control unit (130) can determine 0.2 C, which is a critical C-rate corresponding to the target temperature (T4) in the reference profile, as the reference C-rate. Since the reference C-rate (0.2 C) is higher than the target C-rate (0.13 C), the control unit (130) can determine that charge/discharge by the target temperature and target C-rate included in the set charge/discharge conditions is appropriate.
- the control unit (130) may be configured to determine a threshold temperature corresponding to the target C-rate in the reference profile as a reference temperature, and determine that charging and discharging are appropriate if the reference temperature is lower than or equal to the target temperature. Conversely, if the reference temperature exceeds the target temperature, the control unit (130) may determine that charging and discharging of the battery under the set charging and discharging conditions is not appropriate.
- the reference temperature is a critical temperature corresponding to the target C-rate, and may mean the minimum temperature at which a peak may exist within the region of interest of the reference differential profile when charging and discharging the battery at the target C-rate.
- the control unit (130) may determine that charge/discharge at the target temperature and target C-rate is appropriate. Conversely, if the reference temperature exceeds the target temperature, a peak may not exist within the region of interest of the differential profile obtained during charge/discharge at the target temperature and target C-rate. Therefore, the control unit (130) may determine that charge/discharge at the target temperature and target C-rate is not appropriate.
- the control unit (130) can determine T3, which is a critical temperature corresponding to the target C-rate (0.13 C), as the reference temperature. Since the reference temperature (T3) is lower than or equal to the target temperature (T4), the control unit (130) can determine that charge/discharge according to the target temperature and target C-rate included in the set charge/discharge conditions is appropriate.
- the battery profile generation device (100) may further include a temperature control unit (140) configured to control the temperature of the battery.
- a temperature control unit 140 configured to control the temperature of the battery.
- the control unit (130) may be configured to control the temperature control unit (140) until the temperature of the battery reaches the target temperature if the target temperature and the temperature of the battery do not correspond.
- the temperature control unit (140) can directly/indirectly heat or cool the battery so that the temperature of the battery is maintained within a certain range before the charging/discharging unit (110) charges/discharges the battery according to the charging/discharging conditions.
- the temperature control unit (140) can heat the battery using a coil. Specifically, the temperature control unit (140) can control the temperature generated by the resistance of the coil by adjusting the intensity of the current flowing through the coil. As another example, the temperature control unit (140) can include a heat exchanger and heat or cool the battery using the fluid within the heat exchange pipe. Meanwhile, the temperature control unit (140) can be applied without limitation to any device that can control the temperature of the battery.
- the temperature control unit (140) can be connected to the control unit (130) to enable wired and/or wireless communication.
- control unit (130) can compare battery information and charge/discharge conditions and control the temperature control unit (140) based on the comparison result.
- control unit (130) can control the temperature control unit (140) to directly/indirectly heat the battery.
- the temperature control unit (140) can heat the battery until the temperature of the battery reaches the target temperature and within a predetermined error range.
- the battery profile generation device (100) includes a temperature control unit (140), thereby controlling the battery temperature to reach a target temperature before charging and discharging. That is, the region of interest of the differential profile based on battery information measured during the charging and discharging process may include peaks. According to the battery profile generation device (100), even a low-temperature battery can be charged and discharged by increasing its temperature, thereby generating a battery profile that more accurately reflects the battery's condition.
- the control unit (130) can control the temperature control unit (140) to directly/indirectly cool the battery.
- the temperature control unit (140) can cool the battery until the temperature of the battery reaches the target temperature and within a predetermined error range.
- the control unit (130) may control the temperature control unit (140) so that the battery temperature corresponds to the target temperature.
- the battery profile generation device (100) can cool the battery to a target temperature before charging and discharging to prevent battery degradation due to high-temperature charging and discharging. Accordingly, according to one embodiment of the present invention, since the battery is less degraded during the charging and discharging process, the expected lifespan of the battery can be increased.
- the control unit (130) can be configured to provide information about the battery by outputting the battery profile to the outside.
- control unit (130) may be connected to an external device capable of diagnosing the condition of a battery based on a battery profile, and may communicate with it via wired and/or wireless communication.
- the control unit (130) may transmit the battery profile to the external device via wired and/or wireless communication.
- the external device may include a diagnostic device or a server, and any device capable of diagnosing the condition of a battery by analyzing the battery profile may be applied without limitation.
- the battery profile generation device (100) according to the present invention can be applied to a BMS (Battery Management System). That is, the BMS according to the present invention can include the above-described battery profile generation device (100). In this configuration, at least some of the components of the battery profile generation device (100) can be implemented by supplementing or adding the functions of the components included in a conventional BMS. For example, the charging/discharging unit (110), the measuring unit (120), the control unit (130), the temperature control unit (140), and the storage unit (150) of the battery profile generation device (100) can be implemented as components of the BMS.
- the charging/discharging unit (110), the measuring unit (120), the control unit (130), the temperature control unit (140), and the storage unit (150) of the battery profile generation device (100) can be implemented as components of the BMS.
- the battery profile generation device (100) according to the present invention may be provided in a battery pack. That is, the battery pack according to the present invention may include the above-described battery profile generation device (100) and one or more battery cells. In addition, the battery pack may further include electrical components (relays, fuses, etc.) and a case, etc.
- FIG. 6 is a drawing showing an exemplary configuration of a battery pack (10) according to another embodiment of the present invention.
- the positive terminal of the battery (11) can be connected to the positive terminal (P+) of the battery pack (10), and the negative terminal of the battery (11) can be connected to the negative terminal (P-) of the battery pack (10).
- the positive terminal (P+) of the battery pack (10) can be connected to one side of the charging/discharging unit (110), and the negative terminal (P-) of the battery pack (10) can be connected to the other side of the charging/discharging unit (110).
- the battery pack (10) may be configured to provide a battery profile to a diagnostic device or server.
- the diagnostic device or server may be a device or server configured to diagnose the condition of the battery based on the battery profile.
- the battery profile generation device (100) according to the present invention may be equipped in a diagnostic device (not shown). That is, the diagnostic device according to the present invention may include the battery profile generation device (100) described above.
- the diagnostic device can charge and discharge a battery and diagnose the state of the battery.
- the diagnostic device may be configured to generate a battery profile representing the charge and discharge characteristics of the battery and diagnose the state of the battery using the generated battery profile.
- the battery profile generated by the battery profile generation device (100) can precisely reflect various state changes occurring during the battery's charging and discharging process.
- the battery profile can more accurately represent conditions such as increased internal resistance, decreased capacity, overcharge, and overvoltage, and such battery profile can be effectively used to interpret the battery's deterioration mechanism and diagnose its condition.
- the diagnostic device can quantitatively diagnose the amount of available lithium loss due to the formation of a solid electrolyte interphase (SEI) layer or side reactions based on the battery profile.
- the diagnostic device can quantitatively diagnose the state of degradation in each electrode by calculating the amount of loss of positive and negative active materials based on the battery profile.
- the diagnostic device can diagnose the state of health (SOH) of the battery by considering capacity decrease, internal resistance increase, and/or voltage characteristic change based on the battery profile.
- the diagnostic device can estimate the amount of gas generated due to electrolyte decomposition based on the battery profile.
- FIG. 7 is a diagram schematically illustrating a battery profile generation method according to another embodiment of the present invention.
- the battery profile generation method may include a charge/discharge condition determination step (S100), a control step (S200), and a battery profile generation step (S300).
- each step of the battery profile generation method can be performed by the battery profile generation device (100).
- the battery profile generation device (100) In the following, for convenience of explanation, any content that overlaps with the previously described content will be omitted or briefly described.
- the charge/discharge condition determination step (S100) is a step of determining a target temperature and a target C-rate corresponding to the charge/discharge condition based on a reference profile preset to indicate a correspondence between a critical temperature and a critical C-rate, and can be performed by the control unit (130).
- the charge/discharge conditions may be set to include a target temperature.
- the control unit (130) may determine the target C-rate based on the target temperature and reference profile included in the charge/discharge conditions.
- control unit (130) may be configured to determine a threshold C-rate corresponding to a target temperature in the reference profile as the target C-rate.
- the charge/discharge conditions may be set to include a target C-rate.
- the control unit (130) may determine the target temperature based on the target C-rate and reference profile included in the charge/discharge conditions.
- control unit (130) may be configured to determine a threshold temperature corresponding to the target C-rate in the reference profile as the target temperature.
- control unit (130) may be configured to select one or more critical temperatures whose corresponding critical C-rate is greater than the target C-rate in the reference profile, and determine a minimum temperature, a maximum temperature, or an intermediate temperature among the selected one or more critical temperatures as the target temperature.
- the control step (S200) is a step of controlling the charging/discharging unit (110) to charge/discharge the battery at a target C-rate when the temperature of the battery corresponds to the target temperature, and can be performed by the control unit (130).
- control unit (130) can transmit a control signal including charge and discharge conditions to the charge and discharge unit (110).
- the charge and discharge unit (110) can be configured to charge and discharge the battery at a target C-rate among the charge and discharge conditions included in the received control signal.
- the battery profile creation step (S300) is a step of creating a battery profile corresponding to a battery based on battery information including at least one of the voltage, current, and temperature of the battery, and can be performed by the control unit (130).
- the parameters that constitute the battery profile are not limited.
- the embodiments of the present invention described above are not implemented only through devices and methods, but may also be implemented through a program that realizes a function corresponding to the configuration of the embodiments of the present invention or a recording medium on which the program is recorded, and such implementation can be easily implemented by an expert in the technical field to which the present invention belongs based on the description of the embodiments described above.
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Abstract
Description
Claims (14)
- 배터리를 충방전시키도록 구성된 충방전부;상기 배터리의 충방전 과정에서 상기 배터리의 전압, 전류 및 온도 중 적어도 하나를 포함하는 배터리 정보를 측정하도록 구성된 측정부; 및임계 온도와 임계 C-rate(Current-rate) 간의 대응 관계를 나타내도록 미리 설정된 참조 프로파일에 기반하여 충방전 조건에 대응되는 타겟 온도 및 타겟 C-rate를 결정하고, 상기 배터리의 온도가 상기 타겟 온도에 대응되면 상기 타겟 C-rate로 상기 배터리를 충방전하도록 상기 충방전부를 제어하며, 상기 배터리 정보에 기반하여 상기 배터리에 대응되는 배터리 프로파일을 생성하도록 구성된 제어부를 포함하는 것을 특징으로 하는 배터리 프로파일 생성 장치.
- 제1항에 있어서,상기 충방전 조건은, 상기 타겟 온도를 포함하도록 설정되고,상기 제어부는,상기 참조 프로파일에서 상기 타겟 온도에 대응되는 상기 임계 C-rate를 상기 타겟 C-rate로 결정하도록 구성된 것을 특징으로 하는 배터리 프로파일 생성 장치.
- 제1항에 있어서,상기 제어부는,상기 참조 프로파일에서 대응되는 임계 온도가 상기 타겟 온도보다 작은 하나 이상의 임계 C-rate 중에서 최소 C-rate, 최대 C-rate 또는 중간 C-rate를 상기 타겟 C-rate로 결정하도록 구성되는 배터리 프로파일 생성 장치.
- 제1항에 있어서,상기 충방전 조건은, 상기 타겟 C-rate를 포함하도록 설정되고,상기 제어부는,상기 참조 프로파일에서 상기 타겟 C-rate에 대응되는 임계 온도를 상기 타겟 온도로 결정하도록 구성된 것을 특징으로 하는 배터리 프로파일 생성 장치.
- 제4항에 있어서,상기 제어부는,상기 참조 프로파일에서 대응되는 상기 임계 C-rate가 상기 타겟 C-rate보다 큰 하나 이상의 임계 온도를 선택하고, 선택된 하나 이상의 임계 온도 중에서 최소 온도, 최대 온도 또는 중간 온도를 상기 타겟 온도로 결정하도록 구성된 것을 특징으로 하는 배터리 프로파일 생성 장치.
- 제1항에 있어서,상기 충방전 조건은, 상기 타겟 온도 및 상기 타겟 C-rate를 포함하도록 설정되고,상기 제어부는,상기 참조 프로파일에 기반하여, 상기 타겟 온도와 상기 타겟 C-rate에 따른 충방전 적합성을 판단하고, 상기 충방전이 적합하다고 판단되면 상기 배터리가 충방전되도록 상기 충방전부를 제어하도록 구성된 것을 특징으로 하는 배터리 프로파일 생성 장치.
- 제6항에 있어서,상기 제어부는,상기 참조 프로파일에서 상기 타겟 온도에 대응되는 상기 임계 C-rate를 기준 C-rate로 결정하고, 상기 기준 C-rate가 상기 타겟 C-rate 이상이면 상기 충방전이 적합하다고 판단하도록 구성된 것을 특징으로 하는 배터리 프로파일 생성 장치.
- 제6항에 있어서,상기 제어부는,상기 참조 프로파일에서 상기 타겟 C-rate에 대응되는 상기 임계 온도를 기준 온도로 결정하고, 상기 기준 온도가 상기 타겟 온도 이하이면 상기 충방전이 적합하다고 판단하도록 구성된 것을 특징으로 하는 배터리 프로파일 생성 장치.
- 제1항에 있어서,상기 배터리의 온도를 조절하도록 구성된 온도 조절부를 더 포함하고,상기 제어부는,상기 타겟 온도와 상기 배터리의 온도가 대응되지 않으면, 상기 배터리의 온도가 상기 타겟 온도에 도달할 때까지 상기 온도 조절부를 제어하도록 구성된 것을 특징으로 하는 배터리 프로파일 생성 장치.
- 제1항에 있어서,상기 제어부는,상기 배터리 프로파일을 외부로 출력함으로써 상기 배터리에 대한 정보를 제공하도록 구성된 것을 특징으로 하는 배터리 정보 생성 장치.
- 제1항 내지 제10항 중 어느 한 항에 따른 배터리 프로파일 생성 장치를 포함하는 배터리 팩.
- 제1항 내지 제10항 중 어느 한 항에 따른 배터리 프로파일 생성 장치를 포함하는 진단 장치.
- 임계 온도와 임계 C-rate 간의 대응 관계를 나타내도록 미리 설정된 참조 프로파일에 기반하여 충방전 조건에 대응되는 타겟 온도 및 타겟 C-rate를 결정하는 충방전 조건 결정 단계;배터리의 온도가 상기 타겟 온도에 대응되면 상기 타겟 C-rate로 상기 배터리를 충방전하도록 충방전부를 제어하는 제어 단계; 및상기 배터리의 전압, 전류 및 온도 중 적어도 하나를 포함하는 배터리 정보에 기반하여 상기 배터리에 대응되는 배터리 프로파일을 생성하는 배터리 프로파일 생성 단계를 포함하는 배터리 프로파일 생성 방법.
- 임계 온도와 임계 C-rate 간의 대응 관계를 나타내도록 미리 설정된 참조 프로파일에 기반하여 충방전 조건에 대응되는 타겟 온도 및 타겟 C-rate를 결정하는 충방전 조건 결정 단계;배터리의 온도가 상기 타겟 온도에 대응될 때 상기 타겟 C-rate로 상기 배터리를 충방전하도록 충방전부를 제어하는 제어 단계; 및상기 배터리의 전압, 전류 및 온도 중 적어도 하나를 포함하는 배터리 정보에 기반하여 상기 배터리에 대응되는 배터리 프로파일을 생성하는 배터리 프로파일 생성 단계를 포함하는 배터리 프로파일 생성 방법을 실행하기 위한 프로그램이 저장된 비일시적 컴퓨터 판독 가능한 저장 매체.
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| EP25749039.1A EP4726411A1 (en) | 2024-01-31 | 2025-01-24 | Battery profile generating apparatus and battery profile generating method |
| MX2026002295A MX2026002295A (es) | 2024-01-31 | 2026-02-25 | Aparato para generar perfiles de bateria y metodo para generar perfiles de bateria |
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- 2025-01-24 US US19/036,926 patent/US12553950B2/en active Active
- 2025-01-24 KR KR1020250011899A patent/KR20250119471A/ko not_active Ceased
- 2025-01-24 EP EP25749039.1A patent/EP4726411A1/en active Pending
- 2025-01-24 WO PCT/KR2025/001545 patent/WO2025165136A1/ko active Pending
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| KR20250119471A (ko) | 2025-08-07 |
| CN120958330A (zh) | 2025-11-14 |
| MX2026002295A (es) | 2026-04-01 |
| US20250244390A1 (en) | 2025-07-31 |
| EP4726411A1 (en) | 2026-04-15 |
| US12553950B2 (en) | 2026-02-17 |
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