WO2025159596A1 - 배터리 정보 제공 장치 및 방법 - Google Patents
배터리 정보 제공 장치 및 방법Info
- Publication number
- WO2025159596A1 WO2025159596A1 PCT/KR2025/001542 KR2025001542W WO2025159596A1 WO 2025159596 A1 WO2025159596 A1 WO 2025159596A1 KR 2025001542 W KR2025001542 W KR 2025001542W WO 2025159596 A1 WO2025159596 A1 WO 2025159596A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- profile
- differential
- battery
- target
- overvoltage
- 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
- 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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
-
- 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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
Definitions
- the present invention relates to a battery information providing device and method, and more particularly, to a battery information providing device and method that efficiently generates and provides information related to a battery.
- 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.
- battery condition has been diagnosed by analyzing a battery profile, which indicates the relationship between battery capacity and voltage. For example, capacity and voltage are measured during the battery charging process, and the battery condition is diagnosed by analyzing the battery profile, which indicates the relationship between the measured capacity and voltage.
- battery condition can be diagnosed based on capacity and voltage measured during the battery discharge process.
- a battery profile that accurately reflects the battery's current condition is required.
- obtaining such a battery profile requires a low-rate charge/discharge, such as 0.05C (C-rate).
- C-rate charge/discharge
- the resulting battery profile may not accurately reflect the current battery condition due to the overpotential.
- the battery condition may not be accurately diagnosed, leading to the problem of low-rate charging and discharging being required to accurately diagnose the battery condition.
- a battery information providing device and method are provided for quickly generating a profile used for battery condition diagnosis.
- a battery information providing device may include a profile obtaining unit configured to obtain a differential profile based on a capacity and voltage of a battery; and a control unit configured to determine a target cycle corresponding to the battery and a target C-rate (Current-rate) corresponding to the differential profile, and to generate a correction profile by correcting the differential profile based on an overvoltage profile corresponding to the target cycle and the target C-rate.
- a profile obtaining unit configured to obtain a differential profile based on a capacity and voltage of a battery
- a control unit configured to determine a target cycle corresponding to the battery and a target C-rate (Current-rate) corresponding to the differential profile, and to generate a correction profile by correcting the differential profile based on an overvoltage profile corresponding to the target cycle and the target C-rate.
- the control unit may be configured to generate the correction profile by calculating the difference between the differential profile and the overvoltage profile.
- the above overvoltage profile can be configured to be stored in advance for each of multiple charge/discharge cycles and each of multiple C-rates.
- the control unit may be configured to select an overvoltage profile corresponding to the target cycle and the target C-rate from among a plurality of pre-stored overvoltage profiles.
- the above overvoltage profile can be preset based on a reference differential profile of a first reference battery for the target cycle and reference C-rate and a target differential profile of a second reference battery for the target cycle and target C-rate.
- the above overvoltage profile may be set in multiple ways to correspond to each of a plurality of cycles included in the first target cycle or the second target cycle, based on a first target differentiation profile corresponding to the first target cycle and a second target differentiation profile corresponding to the second target cycle.
- the above overvoltage profile can be set by interpolating the difference between the first target differential profile and the second target differential profile so that it is proportional to each of the plurality of cycles.
- the above overvoltage profile can be preset to represent the difference between the reference differential profile and the target differential profile.
- the above target C-rate can be set to be greater than the above reference C-rate.
- the above profile acquisition unit may be configured to acquire a first differential profile indicating a correspondence relationship between the capacity and the differential voltage.
- the control unit may be configured to correct the first differential profile based on a first overvoltage profile indicating a correspondence between the capacity and the differential voltage.
- the above profile acquisition unit may be configured to acquire a second differential profile indicating a correspondence relationship between the voltage and the differential capacity.
- the control unit may be configured to correct the second differential profile based on a second overvoltage profile indicating a correspondence between the voltage and the differential capacity.
- the above control unit may be configured to provide information about the battery by outputting the correction profile to the outside.
- a battery pack according to another aspect of the present invention may include a battery information providing device according to one aspect of the present invention.
- a vehicle according to another aspect of the present invention may include a battery information providing device according to one aspect of the present invention.
- a battery information providing method may include a profile obtaining step of obtaining a differential profile based on a capacity and voltage of a battery; a target determining step of determining a target cycle corresponding to the battery and a target C-rate corresponding to the differential profile; and a correction profile generating step of generating a correction profile by correcting the differential profile based on an overvoltage profile corresponding to the target cycle and the target C-rate.
- a non-transitory readable storage medium may store a program for executing a battery information providing method, including a profile obtaining step of obtaining a differential profile based on a capacity and voltage of a battery; a target determining step of determining a target cycle corresponding to the battery and a target C-rate corresponding to the differential profile; and a correction profile generating step of generating a correction profile by correcting the differential profile based on an overvoltage profile corresponding to the target cycle and the target C-rate.
- a battery information providing device can reduce the total time required for diagnosing the state of a battery by relatively quickly generating a correction profile used for diagnosing the state of a battery.
- FIG. 1 is a schematic diagram illustrating a battery information providing device according to one embodiment of the present invention.
- FIG. 2 is a diagram schematically illustrating a battery profile according to one embodiment of the present invention.
- FIG. 3 is a schematic diagram illustrating a first differential profile according to one embodiment of the present invention.
- FIG. 4 is a schematic diagram illustrating a second differential profile according to one embodiment of the present invention.
- FIG. 5 is a diagram schematically illustrating an overvoltage profile according to one embodiment of the present invention.
- FIG. 6 is a drawing schematically illustrating a correction profile according to one embodiment of the present invention.
- FIG. 7 is a diagram schematically illustrating multiple overvoltage profiles according to one embodiment of the present invention.
- FIG. 8 is a schematic drawing of a battery pack according to another embodiment of the present invention.
- FIG. 9 is a schematic drawing of a vehicle according to another embodiment of the present invention.
- FIG. 10 is a diagram schematically illustrating a battery information providing method according to another embodiment of the present invention.
- FIG. 1 is a schematic diagram illustrating a battery information providing device (100) according to one embodiment of the present invention.
- a battery information providing device (100) may include a profile acquisition unit (110), a control unit (120), and a storage unit (130).
- a battery may refer 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 cylindrical, prismatic, or pouch-shaped.
- a battery may refer to a battery bank, battery module, or battery pack, in which multiple cells are connected in series and/or parallel.
- the term "battery" will be described herein as referring to a single, independent cell.
- the profile acquisition unit (110) can be configured to acquire a differential profile based on the capacity and voltage of the battery.
- a battery profile is a profile that represents the relationship between voltage (V) and capacity (Q) when the battery's State of Charge (SOC) is charged from a preset start SOC or 0% to a preset end SOC or 100%.
- a battery profile (BP) may represent the relationship between voltage (V) and capacity (Q) when the battery's SOC is discharged from a preset start SOC or 100% to a preset end SOC or 0%.
- FIG. 2 is a schematic diagram illustrating a battery profile (BP) according to one embodiment of the present invention.
- the battery profile (BP) can be expressed as an X-Y graph in which the X-axis is set to capacity (Q) and the Y-axis is set to voltage (V).
- the voltage range of the battery is Vi to Vf, and the capacity range of the battery is Qi to Qf.
- a differential profile representing the correspondence between differential voltage (dV/dQ) and capacity (Q) can be generated.
- the differential voltage is the differential value of voltage with respect to capacity, and is the value obtained by differentiating voltage with respect to capacity.
- this differential profile obtained by differentiating voltage with respect to capacity is referred to as the first differential profile (DP1).
- Fig. 3 is a schematic diagram illustrating a first differential profile (DP1) according to one embodiment of the present invention.
- the first differential profile (DP1) can be expressed as an X-Y graph in which the X-axis is set to capacity (Q) and the Y-axis is set to differential voltage (dV/dQ).
- the differential capacity is the differential value of the capacity with respect to the voltage, and is the value obtained by differentiating the capacity with respect to the voltage.
- this differential profile obtained by differentiating the capacity with respect to the voltage is referred to as the second differential profile (DP2).
- Fig. 4 is a schematic diagram illustrating a second differential profile (DP2) according to one embodiment of the present invention.
- the second differential profile (DP2) can be expressed as an X-Y graph in which the X-axis is set to voltage (V) and the Y-axis is set to differential capacitance (dQ/dV).
- a battery profile For example, there are no specific restrictions on the current rate (C-rate) during charging or discharging to generate a battery profile (BP).
- C-rate current rate
- BP battery profile
- differential profiles the battery can be charged or discharged at a low rate.
- a battery profile (BP) can be generated during the process of charging or discharging the battery at a low rate, such as 0.05C.
- the profile acquisition unit (110) can directly receive the differential profile of the battery from an external source.
- the profile acquisition unit (110) can acquire the differential profile by receiving the differential profile through a wired and/or wireless connection to the external source.
- the profile acquisition unit (110) can directly receive the battery profile (BP) of the battery from an external source. Furthermore, the profile acquisition unit (110) can generate a differential profile based on the received battery profile (BP). For example, the profile acquisition unit (110) can be connected to the external source via wires and/or wirelessly to receive the battery profile (BP) and directly generate a differential profile from the received battery profile (BP), thereby acquiring the differential profile.
- the profile acquisition unit (110) may receive battery information regarding the voltage and capacity of the battery. Furthermore, the profile acquisition unit (110) may generate a battery profile (BP) based on the received battery information, and may generate a differential profile based on the generated battery profile (BP). The profile acquisition unit (110) may acquire the differential profile by directly generating the differential profile based on the received battery information.
- BP battery profile
- BP battery profile
- the profile acquisition unit (110) may be connected to the control unit (120) so as to be able to communicate with it.
- the profile acquisition unit (110) may be connected to the control unit (120) via wire and/or wirelessly.
- the profile acquisition unit (110) may transmit the acquired differential profile to the control unit (120).
- the control unit (120) may be configured to determine a target C-rate corresponding to a target cycle and a differential profile corresponding to the battery.
- control unit (120) can obtain information about the target cycle and target C-rate together with the differential profile from the profile acquisition unit (110).
- the target cycle corresponding to the battery may be 30.
- the control unit (120) may receive information about the differential profile and the 30th cycle from the profile acquisition unit (110). Then, the control unit (120) may determine the 30th cycle corresponding to the battery as the target cycle.
- the target C-rate corresponding to the differential profile may be 0.33 C.
- the control unit (120) may receive information about the differential profile and 0.33 C from the profile acquisition unit (110). Then, the control unit (120) may determine 0.33 C corresponding to the differential profile as the target C-rate.
- the control unit (120) may be configured to generate a correction profile (CP) by correcting a differential profile based on an overvoltage profile (OP) corresponding to a target cycle and a target C-rate.
- CP correction profile
- OP overvoltage profile
- the overvoltage profile (OP) may be preset to represent an overvoltage portion included in the differential profile.
- the overvoltage profile (OP) may be preset based on a reference differential profile of a first reference battery for a target cycle and a reference C-rate and a target differential profile of a second reference battery for the target cycle and the target C-rate.
- the target C-rate may be set to be greater than the reference C-rate.
- the overvoltage profile (OP) may be preset to represent a difference between the reference differential profile and the target differential profile.
- the target cycle is the 30th cycle
- the reference C-rate is 0.05C
- the target C-rate is 0.33C
- the first reference battery is charged (or discharged) at 0.05C in the 30th cycle
- a reference battery profile for the reference C-rate is acquired, and a reference differential profile can be acquired based on the reference battery profile.
- the second reference battery is charged (or discharged) at 0.33C in the 30th cycle
- a target battery profile for the target C-rate is acquired, and a target differential profile can be acquired based on the target battery profile.
- an overvoltage profile (OP) corresponding to the 30th cycle and the C-rate of 0.33C can be generated.
- the control unit (120) can generate an overvoltage profile (OP) by removing the reference differentiation profile based on the reference C-rate from the target differentiation profile based on the target C-rate.
- Fig. 5 is a schematic diagram illustrating an overvoltage profile (OP) according to one embodiment of the present invention.
- Fig. 5 illustrates an overvoltage profile (OP) corresponding to a first differential profile (DP1).
- the overvoltage profile (OP) according to the embodiment of FIG. 5 can be expressed as an X-Y graph in which the X-axis is set to capacity and the Y-axis is set to differential voltage.
- the overvoltage profile (OP) can represent a correspondence between the capacity and the differential voltage.
- the overvoltage profile (OP) corresponding to the second differential profile (DP2) can be expressed as an X-Y graph in which the X-axis is set to voltage and the Y-axis is set to differential capacity.
- the overvoltage profile (OP) can represent the correspondence between voltage and differential capacity.
- control unit (120) can be configured to select an overvoltage profile (OP) corresponding to the target cycle and target C-rate from among a plurality of pre-stored overvoltage profiles (OP).
- OP overvoltage profile
- the overvoltage profile (OP) can be configured to be pre-stored for each of multiple charge/discharge cycles and each of multiple C-rates.
- a plurality of overvoltage profiles (OPs) are provided, and the charge/discharge cycles and C-rates corresponding to each of the plurality of overvoltage profiles (OPs) may be different from each other. For example, based on a unit charge/discharge cycle and a unit C-rate, an overvoltage profile (OP) corresponding to each C-rate may be stored in advance.
- the control unit (120) may be configured to generate a correction profile (CP) by calculating the difference between the differential profile and the overvoltage profile (OP).
- CP correction profile
- OP overvoltage profile
- control unit (120) can generate a correction profile (CP) by calculating the difference between the differential profile and the overvoltage profile (OP) in the same way that the overvoltage profile (OP) is generated based on the difference between the reference differential profile and the target differential profile.
- CP correction profile
- OP overvoltage profile
- the control unit (120) can generate a correction profile (CP) by calculating the differential voltage difference by capacity between the first differential profile (DP1) and the overvoltage profile (OP).
- CP correction profile
- the control unit (120) can generate a correction profile (CP) by calculating the voltage-dependent differential capacity difference between the second differential profile (DP2) and the overvoltage profile (OP).
- FIG. 6 is a schematic diagram illustrating a correction profile (CP) according to an embodiment of the present invention.
- the correction profile (CP) can be generated based on the differential voltage difference between the first differential profile (DP1) and the overvoltage profile (OP) for each capacity.
- the control unit (120) can generate a correction profile (CP) from which the overvoltage portion included in the first differential profile (DP1) is removed by calculating the difference between the first differential profile (DP1) and the overvoltage profile (OP).
- a compensation profile (CP) with overvoltage removed can be quickly obtained.
- the battery information provision device (100) since the advantage of being able to quickly generate and provide a profile used for battery diagnosis.
- BP battery profile
- it can take approximately 20 hours just to acquire the BP.
- converting the acquired BP into a differential profile and diagnosing the battery's condition based on the differential profile can also take additional time. Because the process of acquiring a BP when charging/discharging at such a low C-rate requires a significant amount of time, it is difficult to quickly diagnose the battery's condition.
- a battery profile (BP) can be obtained in approximately 3 hours.
- the time required to obtain a battery profile (BP) can be reduced compared to when charging and discharging at a low C-rate, such as 0.05C.
- the battery profile (BP) obtained according to one embodiment of the present invention includes an overvoltage corresponding to noise.
- the battery information providing device (100) can quickly remove the noise included in the differential profile by calculating the difference between the differential profile and the overvoltage profile (OP). Therefore, even if the time required to generate the correction profile (CP) is further taken into account, the battery information providing device (100) according to one embodiment of the present invention has the advantage of being able to generate a profile capable of diagnosing the condition of the battery relatively very quickly compared to a method in which low-rate charging and discharging are forced.
- the profile acquisition unit (110) and the control unit (120) provided in the battery information provision 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.
- the control logic when the control logic is implemented in software, the profile acquisition unit (110) and 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 profile acquisition unit (110) and the control unit (120).
- the memory may be located inside or outside the profile acquisition unit (110) and the control unit (120), and may be connected to the profile acquisition unit (110) and the control unit (120) by various well-known means.
- the battery information providing 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 information providing 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 able to record, erase, update, and read 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 profile acquisition unit (110) and the control unit (120).
- the storage unit (130) can store a battery profile (BP), a differential profile (DP1, DP2), an overvoltage profile (OP), and a correction profile (CP).
- BP battery profile
- DP1, DP2 differential profile
- OP overvoltage profile
- CP correction profile
- the profile acquisition unit (110) may be configured to acquire a first differential profile (DP1) indicating a correspondence between a capacity and a differential voltage.
- the control unit (120) may be configured to correct the first differential profile (DP1) based on a first overvoltage profile (OP) indicating a correspondence between a capacity and a differential voltage.
- the profile acquisition unit (110) may be configured to acquire a second differential profile (DP2) representing a correspondence between voltage and differential capacitance.
- the control unit (120) may be configured to correct the second differential profile (DP2) based on the second overvoltage profile representing a correspondence between voltage and differential capacitance.
- the formats of the differential profile and the overvoltage profile (OP) can be identical.
- the overvoltage profile (OP) can also represent a correspondence between capacitance and differential voltage. If the differential profile represents a correspondence between voltage and differential capacity, the overvoltage profile (OP) can also represent a correspondence between voltage and differential capacity.
- the first differential profile (DP1) and the overvoltage profile (OP) represent a correspondence between capacity and differential voltage. Accordingly, the control unit (120) can generate a correction profile (CP) by calculating the differential voltage difference for each capacity between the first differential profile (DP1) and the overvoltage profile (OP).
- the overvoltage profile (OP) can be set multiple times to correspond to each of a plurality of charge/discharge cycles included in the first target cycle or the second target cycle, based on a first target differential profile corresponding to the first target cycle and a second target differential profile corresponding to the second target cycle.
- the overvoltage profile (OP) can be set by interpolating the difference between the first target differential profile and the second target differential profile so that it is proportional to each of the multiple charge/discharge cycles.
- Overvoltage profiles (OP) for charge/discharge cycles and C-rates that have not been experimentally obtained can be obtained and stored through interpolation or extrapolation between similar overvoltage profiles (OP).
- the control unit (120) can generate overvoltage profiles (OP) for various charge/discharge cycles and C-rates in addition to the pre-stored overvoltage profiles (OP) through interpolation or extrapolation, and store the generated overvoltage profiles (OP) in the storage unit (130).
- an overvoltage profile corresponding to the 10th cycle and a C-rate of 1.1C can be further acquired based on the difference between the first and second overvoltage profiles (OP).
- an overvoltage profile (OP) corresponding to the 11th cycle and a C-rate of 1C can be further acquired based on the difference between the first and third overvoltage profiles (OP).
- Fig. 7 is a diagram schematically illustrating a plurality of overvoltage profiles according to one embodiment of the present invention.
- the target C-rate corresponding to the nth overvoltage profile and the mth overvoltage profile is the same, n is a natural number greater than or equal to 1, and m is a natural number greater than or equal to n+2.
- the nth overvoltage profile (OPn) corresponds to the nth cycle
- the mth overvoltage profile (OPm) corresponds to the mth cycle
- the overvoltage profiles (OP) corresponding to the n+1 to m-1th cycles can be generated and stored so as to be proportional to the difference between the nth overvoltage profile (OPn) and the mth overvoltage profile (OPm).
- the differential voltage corresponding to the capacity Qt of the nth overvoltage profile (OPn) is dVn
- the differential voltage corresponding to the capacity Qt of the mth overvoltage profile (OPm) is dVm.
- the differential voltage difference (dVm-dVn) between dVm and dVn can be interpolated so as to be proportional to the n+1 to m-1th cycles, respectively.
- the differential voltage corresponding to the capacity Qt of the kth cycle (where k is a natural number greater than or equal to n+1 and less than or equal to m-1) can be calculated according to the formula "dVn+(dVm-dVn) ⁇ (m-n) ⁇ (k-n)".
- the differential voltage difference (dVm-dVn) can be interpolated so as to be proportional to the kth cycle.
- a charge/discharge cycle corresponding to a first overvoltage profile (OP) is a first cycle
- a differential voltage corresponding to a first capacity is 11
- a charge/discharge cycle corresponding to a tenth overvoltage profile (OP) is a tenth cycle
- a differential voltage corresponding to the first capacity is 20
- the differential voltage corresponding to the first capacity of the fifth overvoltage profile (OP) corresponding to the fifth cycle is 15.
- the overvoltage profile (OP) is set multiple times to correspond to multiple charge/discharge cycles and multiple C-rates, the overvoltage profile (OP) corresponding to the target cycle and target C-rate can be quickly determined.
- the control unit (120) can be configured to provide information about the battery by outputting a correction profile (CP) to the outside.
- CP correction profile
- the control unit (120) may be connected to an external device capable of diagnosing the condition of a battery based on a correction profile (CP) and communicated with it via wired and/or wireless communication.
- the control unit (120) may transmit the correction profile (CP) 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 a correction profile (CP) may be applied without limitation.
- the compensation profile (CP) is a profile indicating the current state of the battery
- the state of the battery can be diagnosed based on the behavior of the peaks included in the compensation profile (CP).
- the peaks refer to the maximum or minimum points of the compensation profile (CP).
- the state of the battery may not be accurately diagnosed due to the influence of the overvoltage.
- the battery information providing device (100) generates and provides a compensation profile (CP) that removes the overvoltage included in the differential profile, the state of the battery can be relatively accurately diagnosed based on the compensation profile (CP).
- the battery information providing device (100) can quickly generate a compensation profile (CP) used to diagnose the state of the battery, thereby reducing the total time required to diagnose the state of the battery.
- the battery information providing 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 information providing device (100) described above.
- at least some of the components of the battery information providing device (100) can be implemented by supplementing or adding to the functions of the components included in a conventional BMS.
- the profile acquisition unit (110), control unit (120), and storage unit (130) of the battery information providing device (100) can be implemented as components of the BMS.
- the battery information providing device (100) according to the present invention may be provided in a battery pack.
- the battery pack according to the present invention may include the battery information providing 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. 8 is a schematic drawing 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 measuring unit (12) can be connected to a first sensing line (SL1), a second sensing line (SL2), and a third sensing line (SL3).
- the measuring unit (12) can be connected to a positive terminal of the battery (11) through the first sensing line (SL1), and can be connected to a negative terminal of the battery (11) through the second sensing line (SL2).
- the measuring unit (12) can measure the voltage of the battery (11) based on the voltage measured at each of the first sensing line (SL1) and the second sensing line (SL2).
- the measuring unit (12) can be connected to the current measuring unit (A) through the third sensing line (SL3).
- the current measuring unit (A) can be an ammeter or a shunt resistor capable of measuring the charging current and discharging current of the battery (11).
- the measuring unit (12) can measure the charging current of the battery (11) through the third sensing line (SL3) to calculate the charging amount.
- the measuring unit (12) can measure the discharging current of the battery (11) through the third sensing line (SL3) to calculate the discharging amount.
- the profile acquisition unit (110) can receive battery information about the voltage and current of the battery from the measurement unit (12). Then, the profile acquisition unit (110) can generate a battery profile and a differential profile based on the battery information.
- the profile acquisition unit (110) can receive a battery profile (BP) from the measurement unit (12). Then, the profile acquisition unit (110) can generate a differential profile based on the battery profile (BP).
- BP battery profile
- the profile acquisition unit (110) can receive a differential profile from the measurement unit (12).
- An external device may be connected to the positive terminal (P+) and negative terminal (P-) of the battery pack (10).
- the external device may be a charging device or a load.
- the positive terminal of the battery (11), the positive terminal (P+) of the battery pack (10), the external device, the negative terminal (P-) of the battery pack (10), and the negative terminal of the battery (11) may be electrically connected.
- FIG. 9 is a schematic drawing of a vehicle according to another embodiment of the present invention.
- a battery pack according to an embodiment of the present invention may be included in a vehicle (900), such as an electric vehicle (EV) or a hybrid vehicle (HV). Furthermore, the battery pack (910) may drive the vehicle (900) by supplying power to a motor through an inverter provided in the vehicle (900).
- the battery pack (910) may include a battery information providing device (100).
- the vehicle (900) may include a battery information providing device (100).
- the battery information providing device (100) may be an onboard device included in the vehicle (900).
- FIG. 10 is a diagram schematically illustrating a battery information providing method according to another embodiment of the present invention.
- a method for providing battery information may include a profile acquisition step (S100), a target determination step (S200), and a correction profile (CP) generation step (S300).
- Each step of the battery information providing method can be performed by the battery information providing device (100).
- the profile acquisition step (S100) is a step of acquiring a differential profile based on the capacity and voltage of the battery, and can be performed by the profile acquisition unit (110).
- the profile acquisition unit (110) can directly receive the differential profile of the battery from an external source.
- the profile acquisition unit (110) can acquire the differential profile by receiving the differential profile through a wired and/or wireless connection to the external source.
- the profile acquisition unit (110) can directly receive the battery profile (BP) of the battery from the outside. Furthermore, the profile acquisition unit (110) can generate a differential profile based on the received battery profile (BP). The profile acquisition unit (110) can be connected to the outside via wired and/or wireless means to receive the battery profile (BP) and directly generate a differential profile from the received battery profile (BP), thereby acquiring the differential profile.
- the profile acquisition unit (110) may receive battery information regarding the voltage and capacity of the battery. Furthermore, the profile acquisition unit (110) may generate a battery profile (BP) based on the received battery information, and may generate a differential profile based on the generated battery profile (BP). The profile acquisition unit (110) may acquire the differential profile by directly generating the differential profile based on the received battery information.
- BP battery profile
- BP battery profile
- the target determination step (S200) is a step of determining a target cycle corresponding to the battery and a target C-rate corresponding to the differential profile, and can be performed by the control unit (120).
- control unit (120) can receive information on a differential profile, a charge/discharge cycle, and a C-rate from the profile acquisition unit (110). Then, the control unit (120) can determine the received charge/discharge cycle as a target cycle, and determine the received C-rate as a target C-rate.
- the correction profile (CP) generation step (S300) is a step of generating a correction profile (CP) by correcting a differential profile based on an overvoltage profile (OP) corresponding to a target cycle and a target C-rate, and can be performed by the control unit (120).
- control unit (120) may be configured to select an overvoltage profile (OP) corresponding to a target cycle and a target C-rate from among a plurality of pre-stored overvoltage profiles (OP).
- the control unit (120) may be configured to generate a correction profile (CP) by calculating the difference between the differential profile and the overvoltage profile (OP).
- the control unit (120) can generate a correction profile (CP) by calculating the differential voltage difference by capacity between the first differential profile (DP1) and the overvoltage profile (OP).
- CP correction profile
- the control unit (120) can generate a correction profile (CP) by calculating the voltage-dependent differential capacity difference between the second differential profile (DP2) and the overvoltage profile (OP).
- CP correction profile
- 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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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
Description
Claims (15)
- 배터리의 용량과 전압에 기반한 미분 프로파일을 획득하도록 구성된 프로파일 획득부; 및상기 배터리에 대응되는 타겟 사이클 및 상기 미분 프로파일에 대응되는 타겟 C-rate(Current-rate)를 결정하고, 상기 타겟 사이클 및 상기 타겟 C-rate에 대응되는 과전압 프로파일에 기반하여 상기 미분 프로파일을 보정함으로써 보정 프로파일을 생성하도록 구성된 제어부를 포함하는 배터리 정보 제공 장치.
- 제1항에 있어서,상기 제어부는,상기 미분 프로파일과 상기 과전압 프로파일 간의 차이를 계산하여 상기 보정 프로파일을 생성하도록 구성되는 배터리 정보 제공 장치.
- 제1항에 있어서,상기 과전압 프로파일은, 복수의 충방전 사이클 및 복수의 C-rate 각각에 대하여 미리 저장되도록 구성되고,상기 제어부는,미리 저장된 복수의 상기 과전압 프로파일 중에서 상기 타겟 사이클 및 상기 타겟 C-rate에 대응되는 과전압 프로파일을 선택하도록 구성되는 배터리 정보 제공 장치.
- 제1항에 있어서,상기 과전압 프로파일은,상기 타겟 사이클 및 기준 C-rate에 대한 제1 기준 배터리의 기준 미분 프로파일과 상기 타겟 사이클 및 상기 타겟 C-rate에 대한 제2 기준 배터리의 타겟 미분 프로파일에 기반하여 미리 설정되는 배터리 정보 제공 장치.
- 제4항에 있어서,상기 과전압 프로파일은,제1 타겟 사이클에 대응되는 제1 타겟 미분 프로파일과 제2 타겟 사이클에 대응되는 제2 타겟 미분 프로파일에 기반하여, 상기 제1 타겟 사이클 내지 상기 제2 타겟 사이클에 포함되는 복수의 사이클 각각에 대응되도록 복수 설정되는 배터리 정보 제공 장치.
- 제5항에 있어서,상기 과전압 프로파일은,상기 제1 타겟 미분 프로파일과 상기 제2 타겟 미분 프로파일 간의 차이가 상기 복수의 사이클 각각에 비례하도록 보간되어 설정되는 배터리 정보 제공 장치.
- 제4항에 있어서,상기 과전압 프로파일은,상기 기준 미분 프로파일과 상기 타겟 미분 프로파일 간의 차이를 나타내도록 미리 설정되는 배터리 정보 제공 장치.
- 제4항에 있어서,상기 타겟 C-rate는,상기 기준 C-rate보다 크도록 설정되는 배터리 정보 제공 장치.
- 제1항에 있어서,상기 프로파일 획득부는,상기 용량과 미분 전압 간의 대응 관계를 나타내는 제1 미분 프로파일을 획득하도록 구성되고,상기 제어부는,상기 용량과 상기 미분 전압 간의 대응 관계를 나타내는 제1 과전압 프로파일에 기반하여 상기 제1 미분 프로파일을 보정하도록 구성되는 배터리 정보 제공 장치.
- 제1항에 있어서,상기 프로파일 획득부는,상기 전압과 미분 용량 간의 대응 관계를 나타내는 제2 미분 프로파일을 획득하도록 구성되고,상기 제어부는,상기 전압과 상기 미분 용량 간의 대응 관계를 나타내는 제2 과전압 프로파일에 기반하여 상기 제2 미분 프로파일을 보정하도록 구성되는 배터리 정보 제공 장치.
- 제1항에 있어서,상기 제어부는,상기 보정 프로파일을 외부로 출력함으로써 상기 배터리에 대한 정보를 제공하도록 구성되는 배터리 정보 제공 장치.
- 제1항 내지 제11항 중 어느 한 항에 따른 배터리 정보 제공 장치를 포함하는 배터리 팩.
- 제1항 내지 제11항 중 어느 한 항에 따른 배터리 정보 제공 장치를 포함하는 자동차.
- 배터리의 용량과 전압에 기반한 미분 프로파일을 획득하는 프로파일 획득 단계;상기 배터리에 대응되는 타겟 사이클 및 상기 미분 프로파일에 대응되는 타겟 C-rate(Current-rate)를 결정하는 타겟 결정 단계; 및상기 타겟 사이클 및 상기 타겟 C-rate에 대응되는 과전압 프로파일에 기반하여 상기 미분 프로파일을 보정함으로써 보정 프로파일을 생성하는 보정 프로파일 생성 단계를 포함하는 배터리 정보 제공 방법.
- 배터리의 용량과 전압에 기반한 미분 프로파일을 획득하는 프로파일 획득 단계;상기 배터리에 대응되는 타겟 사이클 및 상기 미분 프로파일에 대응되는 타겟 C-rate를 결정하는 타겟 결정 단계; 및상기 타겟 사이클 및 상기 타겟 C-rate에 대응되는 과전압 프로파일에 기반하여 상기 미분 프로파일을 보정함으로써 보정 프로파일을 생성하는 보정 프로파일 생성 단계를 포함하는 것을 특징으로 하는 배터리 정보 제공 방법을 실행하기 위한 프로그램이 저장된 비일시적 판독 가능한 저장 매체.
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| MX2026002277A MX2026002277A (es) | 2024-01-26 | 2026-02-25 | Aparato y metodo que proporciona informacion de la bateria |
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| KR102885238B1 (ko) * | 2021-09-08 | 2025-11-12 | 삼성전자주식회사 | 배터리 상태를 추정하는 전자 장치 및 그 동작 방법 |
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| KR20130116170A (ko) * | 2012-04-13 | 2013-10-23 | 주식회사 엘지화학 | 혼합 양극재를 포함하는 이차 전지의 시스템, 이차 전지의 관리 장치 및 방법 |
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| KR20240012259A (ko) | 2022-07-20 | 2024-01-29 | 삼성전자주식회사 | 인터리브드 역률 보상 컨버터에서 스위치 제어 방법 및 그 장치 |
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| US20250244393A1 (en) | 2025-07-31 |
| CN121241267A (zh) | 2025-12-30 |
| KR102825303B1 (ko) | 2025-06-24 |
| MX2026002277A (es) | 2026-04-01 |
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