WO2025188166A1 - 배터리 관리 장치 및 방법 - Google Patents
배터리 관리 장치 및 방법Info
- Publication number
- WO2025188166A1 WO2025188166A1 PCT/KR2025/099603 KR2025099603W WO2025188166A1 WO 2025188166 A1 WO2025188166 A1 WO 2025188166A1 KR 2025099603 W KR2025099603 W KR 2025099603W WO 2025188166 A1 WO2025188166 A1 WO 2025188166A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- soh
- battery
- battery bank
- control unit
- bank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
-
- 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
- G01R31/3828—Arrangements for monitoring battery or accumulator variables, e.g. SoC using current integration
-
- 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
Definitions
- the present invention relates to a battery management device and method, and more particularly, to a battery management device and method capable of more accurately estimating the state of 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.
- the present invention has been devised to solve the above problems, and aims to provide a battery management device and method capable of more accurately estimating the SOH (State of health) and SOC (State of charge) of a battery.
- a battery management device may include: a measuring unit configured to measure voltage and current of a battery bank including a plurality of battery cells during a charging process of the battery bank; and a control unit configured to estimate a first SOH of the battery bank based on a charging capacity accumulated from the measured current, determine a second SOH based on a time during which a circulating current flows through the plurality of battery cells from a charging termination time of the battery bank, and estimate the SOH of the battery bank based on the first SOH and the second SOH.
- the control unit may be configured to calculate a charge capacity of the battery bank by accumulating the measured current, and estimate a first SOH of the battery bank based on the calculated charge capacity.
- the above control unit may be configured to calculate the time for which the circulating current flows based on the voltage of the battery bank from the time of termination of the charging.
- the above control unit may be configured to determine the second SOH using an SOH table in which an SOH value corresponding to the time during which the circulating current flows is preset.
- the control unit may be configured to determine the voltage of the battery bank at the time of charging termination and the second SOH corresponding to the time by using an SOH table in which the SOH value corresponding to the time at which the circulating current flows and the voltage of the battery bank after the circulating current flows are preset.
- the control unit may be configured to calculate a difference between the first SOH and the second SOH to produce a third SOH, and estimate the produced third SOH as the SOH of the battery bank.
- the control unit may be configured to determine the second SOH when a difference between the first SOH and the previously estimated SOH of the battery bank is greater than or equal to a preset threshold value.
- the above plurality of battery cells may be configured to be connected in parallel with each other.
- a battery pack according to another aspect of the present invention may include a battery management device according to one aspect of the present invention.
- a vehicle according to another aspect of the present invention may include a battery management device according to one aspect of the present invention.
- a battery management method may include a measuring step of measuring voltage and current of a battery bank including a plurality of battery cells during a charging process of the battery bank; a first SOH estimation step of estimating a first SOH of the battery bank based on a charging capacity accumulated from the measured current; a second SOH calculation step of determining a second SOH based on a time during which a circulating current flows through the plurality of battery cells from a charging termination time of the battery bank; and an SOH estimation step of estimating the SOH of the battery bank based on the first SOH and the second SOH.
- the SOH of a battery bank can be more accurately estimated by considering the time during which a circulating current flows between a plurality of battery cells.
- FIG. 1 is a schematic diagram illustrating a battery management device according to one embodiment of the present invention.
- FIG. 2 is a schematic diagram illustrating a battery bank according to one embodiment of the present invention.
- FIG. 3 is a diagram schematically illustrating an SOH table according to one embodiment of the present invention.
- FIG. 4 is a diagram schematically illustrating an SOH table according to another embodiment of the present invention.
- FIG. 5 is a schematic drawing of a battery pack according to another embodiment of the present invention.
- FIG. 6 is a schematic drawing of a vehicle according to another embodiment of the present invention.
- FIG. 7 is a schematic diagram illustrating an ESS according to another embodiment of the present invention.
- FIG. 8 is a schematic diagram illustrating a battery management method according to another embodiment of the present invention.
- FIG. 1 is a schematic diagram illustrating a battery management device (100) according to one embodiment of the present invention.
- a battery management device (100) may include a measurement unit (110) and a control unit (120).
- the measuring unit (110) can be configured to measure the voltage and current of the battery bank (BB) during the charging process of the battery bank (BB) including a plurality of battery cells.
- a battery cell 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 cell.
- the battery type may be cylindrical, prismatic, or pouch-type.
- a battery bank may include multiple battery cells connected in parallel. If it includes multiple battery cells connected in parallel, the battery bank (BB) may also be referred to as a battery module or battery pack.
- FIG. 2 is a schematic diagram illustrating a battery bank (BB) according to one embodiment of the present invention.
- the battery bank (BB) may include a first battery cell (B1), a second battery cell (B2), and a third battery cell (B3).
- the first battery cell (B1), the second battery cell (B2), and the third battery cell (B3) may be connected in parallel with each other.
- the measuring unit (110) has one end connected to the positive terminal of the battery bank (BB) and can measure the positive potential of the battery bank (BB). Furthermore, the measuring unit (110) has the other end connected to the negative terminal of the battery bank (BB) and can measure the negative potential of the battery bank (BB). Furthermore, the measuring unit (110) can measure the voltage of the battery bank (BB) based on the difference between the positive potential and the negative potential.
- the measuring unit (110) can be connected to the charge/discharge path of the battery bank (BB) to measure the charge/discharge current of the battery bank (BB).
- the measuring unit (110) can be connected to a current measuring unit provided in the high current path of the battery bank (BB) to measure the charge current applied to the battery bank (BB) and the discharge current output from the battery bank (BB).
- the control unit (120) may be configured to estimate the first SOH of the battery bank (BB) based on the charging capacity accumulated from the measured current.
- control unit (120) may be configured to calculate the charge capacity of the battery bank (BB) by integrating the measured current.
- the control unit (120) may calculate the charge capacity of the battery bank (BB) during the charging process by integrating the current measured by the measurement unit (110) from the start time of charging of the battery bank (BB) to the end time of charging.
- the control unit (120) may calculate the charge capacity of the battery bank (BB) by using a current integration method (Coulomb counting, Ampere counting).
- the control unit (120) may be configured to estimate the first SOH of the battery bank (BB) based on the calculated charge capacity. Specifically, the control unit (120) may estimate the first SOH of the battery bank (BB) by calculating the ratio of the charge capacity to a preset reference capacity.
- the reference capacity may be preset to correspond to the initial capacity of the battery bank (BB).
- the reference capacity may be preset to the capacity of the battery bank (BB) in the BOL (Beginning of Life) state.
- the control unit (120) can calculate the charging capacity based on the current of the battery bank (BB) measured by the measurement unit (110). In addition, the control unit (120) can estimate the first SOH of the battery bank (BB) by calculating the ratio between the calculated charging capacity and a preset reference capacity corresponding to the battery bank (BB). For example, the control unit (120) can estimate the first SOH of the battery bank (BB) by calculating the formula “calculated charging capacity ⁇ preset reference capacity.”
- the control unit (120) may be configured to determine the second SOH based on the time during which circulating current flows through the plurality of battery cells from the time of termination of charging of the battery bank (BB).
- control unit (120) can be configured to calculate the time for which the circulating current flows based on the voltage of the battery bank (BB) from the time of charging termination.
- the measuring unit (110) can measure the voltage of the battery bank (BB) according to the measurement cycle even after the charging of the battery bank (BB) is terminated.
- the control unit (120) can calculate the time for which the circulating current flows through the plurality of battery cells based on the voltage of the battery bank (BB) at the time of termination of charging and the voltage of the battery bank (BB) measured by the measuring unit (110) after the termination of charging.
- the capacities of the multiple battery cells may differ immediately after charging the battery bank (BB).
- BB battery bank
- a circulating current flows between the multiple battery cells, balancing their capacities and voltages. This phenomenon is called self-balancing or self-energy balancing.
- the control unit (120) may calculate the time from the time when charging of the battery bank (BB) is completed to the time when the voltage change of the battery bank (BB) is completed as the time during which the circulating current flows through the plurality of battery cells.
- the circulating current is the current that flows directly between the plurality of battery cells
- the time for the circulating current to flow between the plurality of battery cells and the time for the plurality of battery cells to reach a resting state are different times.
- the control unit (120) can be configured to determine the second SOH using an SOH table in which an SOH value corresponding to the time at which the circulating current flows is preset.
- FIG. 3 is a schematic diagram illustrating an SOH table according to one embodiment of the present invention.
- the SOH table may be preset with corresponding SOH values for each time period during which circulating current flows.
- the time period is 0 seconds, no circulating current flows between the plurality of battery cells, and therefore the SOH value is 0%.
- the control unit (120) can determine an SOH value corresponding to the calculated time using the SOH table. Then, the control unit (120) can determine the determined SOH value as a second SOH for the battery bank (BB).
- the second SOH may be a correction value used to correct the estimated first SOH for the battery bank (BB).
- the second SOH is a value that converts the difference in deterioration between multiple battery cells into SOH.
- the second SOH is an internal error value for correcting the SOH of the battery bank (BB).
- the second SOH may be proportional to the time over which the circulating current flows. For example, as the difference in degradation between the multiple battery cells increases, the time over which the circulating current flows between the multiple battery cells may increase. Accordingly, as the time over which the circulating current flows increases, the second SOH value for the battery bank (BB) may increase.
- the control unit (120) can determine an SOH value corresponding to t seconds from the SOH table and determine the determined SOH value as the second SOH for the battery bank (BB).
- the control unit (120) may be configured to estimate the SOH of the battery bank (BB) based on the first SOH and the second SOH.
- control unit (120) may be configured to calculate the difference between the first SOH and the second SOH to produce a third SOH, and estimate the produced third SOH as the SOH of the battery bank (BB).
- control unit (120) can calculate the formula of “first SOH - second SOH” to produce a third SOH, and estimate the produced third SOH as the SOH of the battery bank (BB).
- control unit (120) can estimate the first SOH of the battery bank (BB) by calculating the charge capacity of the battery bank (BB), and determine the second SOH based on the time for which the circulating current flows between the plurality of battery cells (B1, B2, B3).
- control unit (120) can estimate the SOH of the battery bank (BB) by calculating the difference between the first SOH and the second SOH.
- a battery management device (100) can estimate the SOH of the battery bank (BB) more accurately by correcting the SOH of the battery bank (BB) by taking into account an internal error of the battery bank (BB) (difference in deterioration between multiple battery cells).
- the battery management device (100) can estimate the SOH of the battery bank (BB) more accurately by correcting the first SOH of the battery bank (BB) using the second SOH based on the difference between the plurality of battery cells.
- control unit (120) provided in the battery management 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 (120) may be implemented as a set of program modules.
- the program modules may be stored in a memory and executed by the control unit (120).
- the memory may be located inside or outside the control unit (120) and may be connected to the control unit (120) by various well-known means.
- the battery management 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 management device (100) to perform operations and functions, or data generated in the process of performing operations and functions.
- the storage unit (130) is not particularly limited in type as long as it is a known information storage means known to be capable of recording, erasing, updating, and reading data.
- the information storage means may include RAM, flash memory, ROM, EEPROM, registers, etc.
- the storage unit (130) may store program codes defining processes executable by the control unit (120).
- the storage unit (130) can store the voltage and current of the battery bank (BB) measured by the SOH measurement unit (110).
- an SOH table can be stored in the storage unit (130).
- the control unit (120) can access the storage unit (130) to secure the SOH table.
- the storage unit (130) can store information estimated or determined by the control unit (120).
- the control unit (120) may be configured to determine a second SOH corresponding to the voltage and time of the battery bank (BB) at the end of charging by using an SOH table in which the SOH value corresponding to the time at which the circulating current flows and the voltage of the battery bank (BB) after the circulating current flows is preset.
- FIG. 4 is a schematic diagram illustrating an SOH table according to another embodiment of the present invention.
- the SOH table may be preset with SOH values corresponding to the time during which a circulating current flows and the voltage of a battery bank (BB).
- BB battery bank
- the SOH value is 0%.
- the second SOH may be 2%.
- a second SOH that compensates for the first SOH should be determined more accurately.
- the SOH table can be established by taking into account not only the time during which the circulating current flows but also the voltage of the battery bank (BB) after the circulating current flows.
- the control unit (120) can determine a more accurate second SOH by inputting the time during which the circulating current flows and the voltage of the battery bank (BB) into the SOH table. In addition, since the first SOH is corrected by the determined second SOH, the control unit (120) can estimate the SOH of the battery bank (BB) more accurately.
- control unit (120) estimates the first SOH of the battery bank (BB) each time the battery bank (BB) is charged, determines the second SOH based on the difference between the plurality of battery cells, and estimates the SOH of the battery bank (BB) based on the first SOH and the second SOH.
- control unit (120) may determine the second SOH based on the difference between the first SOH estimated in the current charging process (hereinafter, referred to as “current first SOH”) and the SOH estimated in the previous charging process (hereinafter, referred to as “past SOH”).
- control unit (120) may be configured to determine the second SOH when the difference between the first SOH and the previously estimated SOH of the battery bank (BB) is greater than or equal to a preset threshold value.
- the control unit (120) can determine the second SOH if the difference between the current first SOH and the past SOH is greater than a threshold value.
- the threshold value serves as a criterion for determining that the battery bank (BB) has deteriorated to the point where correction of the first SOH by the second SOH is necessary, and can be set theoretically or experimentally.
- the threshold value can be set to a value below 10% SOH.
- the threshold value can be set to a value below 5% SOH. More preferably, the threshold value can be set to a value below 1% SOH.
- the threshold value is set to SOH 1%. If the difference between the current first SOH and the past SOH is 1% or more, the battery bank (BB) has deteriorated more than the time at which the past SOH was estimated, and thus the control unit (120) can determine the second SOH to compensate for the current first SOH.
- the control unit (120) can determine a second SOH and estimate the SOH of the battery bank (BB) by calculating the difference between the current first SOH and the determined second SOH. As another example, if the difference between the current first SOH and the past SOH is less than a threshold value, the control unit (120) can estimate the current first SOH as the SOH of the battery bank (BB).
- the control unit (120) may be configured to update the OCV table indicating the correspondence between the voltage and SOC of multiple battery cells so as to correspond to the SOH of the battery bank (BB).
- multiple OCV tables corresponding to multiple SOHs can be stored in advance. Then, the control unit (120) can select an OCV table corresponding to the SOH of the battery bank (BB) from among the multiple OCV tables and use the selected OCV table to estimate the states of multiple battery cells.
- the OCV table is updated to correspond to the SOH of the compensated battery bank (BB)
- the status of multiple battery cells can be estimated more accurately according to the updated OCV table.
- the battery management 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 battery management device (100) described above. In this configuration, at least some of the components of the battery management device (100) can be implemented by supplementing or adding to the functions of the components included in a conventional BMS. For example, the measurement unit (110), control unit (120), and storage unit (130) of the battery management device (100) can be implemented as components of the BMS.
- the battery management device (100) according to the present invention may be installed in a battery bank (BB). That is, the battery bank (BB) according to the present invention may include the battery management device (100) described above and one or more battery cells. In addition, the battery bank (BB) may further include electrical components (relays, fuses, etc.) and a case, etc.
- FIG. 5 is a schematic drawing of a battery pack (1) according to another embodiment of the present invention.
- the battery module (10) may include a plurality of battery banks (11, 12, 13) connected in series with each other.
- the plurality of battery banks (11, 12, 13) may each include a plurality of battery cells connected in parallel. That is, the battery module (10) may include a plurality of battery cells connected in series and parallel.
- the measuring unit (110) can be connected to the first to fourth sensing lines (SL1, SL2, SL3, SL4). Specifically, the measuring unit (110) can measure the voltage of the first battery bank (11) through the first sensing line (SL1) and the second sensing line (SL2). In addition, the measuring unit (110) can measure the voltage of the second battery bank (12) through the second sensing line (SL2) and the third sensing line (SL3), and can measure the voltage of the third battery bank (13) through the third sensing line (SL3) and the fourth sensing line (SL4). Finally, the measuring unit (110) can measure the voltage of the battery module (10) through the first sensing line (SL1) and the fourth sensing line (SL4).
- the measuring unit (110) can be connected to the current measuring unit (A) through the fifth sensing line (SL5).
- the current measuring unit (A) can be an ammeter or a shunt resistor capable of measuring the charging current and discharging current of the battery module (10).
- the measuring unit (110) can measure the charging current of the battery module (10) through the fifth sensing line (SL5) to calculate the charging amount.
- the measuring unit (110) can measure the discharging current of the battery module (10) through the fifth sensing line (SL5) to calculate the discharging amount.
- An external device can be connected to the positive terminal (P+) and negative terminal (P-) of the battery pack (1).
- the external device can be a charging device or a load.
- the positive terminal of the battery module (10), the positive terminal (P+) of the battery pack (1), the external device, the negative terminal (P-) of the battery pack (1), and the negative terminal of the battery module (10) can be electrically connected.
- FIG. 6 is a schematic drawing of a vehicle (600) according to another embodiment of the present invention.
- a battery pack (610) may be included in a vehicle (600), such as an electric vehicle (EV) or a hybrid vehicle (HV). Furthermore, the battery pack (610) may drive the vehicle (600) by supplying power to a motor through an inverter provided in the vehicle (600).
- the battery pack (610) may include a battery management device (100). That is, the vehicle (600) may include a battery management device (100). In this case, the battery management device (100) may be an onboard device included in the vehicle (600).
- a battery pack (610) includes a plurality of battery banks (BB), and the battery management device (100) can estimate the SOH of each of the plurality of battery banks (BB).
- a plurality of battery banks (BB) connected in series with each other are included in a battery module, and a plurality of battery modules can be included in the battery pack (610).
- FIG. 7 is a schematic diagram illustrating an ESS (Energy storage system) according to another embodiment of the present invention.
- the ESS (700) includes a plurality of battery modules (720) and a rack case (710).
- the plurality of battery modules (720) may be configured to be accommodated in the rack case (710) in a vertically arranged manner.
- a battery management device (100) according to an embodiment of the present invention may be attached to the battery module (720).
- the battery module (720) includes a plurality of battery banks (BB), and the battery management device (100) can estimate the SOH of each of the plurality of battery banks (BB).
- FIG. 8 is a schematic diagram illustrating a battery management method according to another embodiment of the present invention.
- the battery management method may include a measurement step (S100), a first SOH estimation step (S200), a second SOH calculation step, and an SOH estimation step.
- each step of the battery management method can be performed by a battery management device (100).
- a battery management device 100.
- any content that overlaps with the previously described content will be omitted or briefly described.
- the measurement step (S100) is a step of measuring the voltage and current of the battery bank (BB) during a charging process of the battery bank (BB) including a plurality of battery cells, and can be performed by the measurement unit (110).
- the first SOH estimation step (S200) is a step of estimating the first SOH of the battery bank (BB) based on the charging capacity accumulated from the measured current, and can be performed by the control unit (120).
- control unit (120) may be configured to calculate the charge capacity of the battery bank (BB) by integrating the measured current.
- the control unit (120) may calculate the charge capacity of the battery bank (BB) during the charging process by integrating the current measured by the measurement unit (110) from the start time of charging of the battery bank (BB) to the end time of charging.
- control unit (120) may be configured to estimate the first SOH of the battery bank (BB) based on the calculated charge capacity.
- the control unit (120) may estimate the first SOH of the battery bank (BB) by calculating the ratio of the charge capacity to a preset reference capacity.
- the second SOH determination step (S300) is a step of determining the second SOH based on the time during which circulating current flows through multiple battery cells from the time of end of charging of the battery bank (BB), and can be performed by the control unit (120).
- control unit (120) may be configured to calculate the time for which circulating current flows based on the voltage of the battery bank (BB) from the time of charging completion. For example, the control unit (120) may calculate the time for which circulating current flows in the plurality of battery cells as the time for which the voltage of the battery bank (BB) changes from the time of charging completion.
- control unit (120) can determine an SOH value corresponding to the calculated time using the SOH table. In addition, the control unit (120) can determine the determined SOH value as the second SOH for the battery bank (BB).
- the SOH estimation step (S400) is a step of estimating the SOH of the battery bank (BB) based on the first SOH and the second SOH, and can be performed by the control unit (120).
- control unit (120) may be configured to calculate the difference between the first SOH and the second SOH to produce a third SOH, and estimate the produced third SOH as the SOH of the battery bank (BB).
- 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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims (11)
- 복수의 배터리 셀을 포함하는 배터리 뱅크의 충전 과정에서, 상기 배터리 뱅크의 전압 및 전류를 측정하도록 구성된 측정부; 및상기 측정된 전류를 적산한 충전 용량에 기반하여 상기 배터리 뱅크의 제1 SOH를 추정하고, 상기 배터리 뱅크의 충전 종료 시점부터 상기 복수의 배터리 셀에 순환 전류가 흐르는 시간에 기반하여 제2 SOH를 결정하며, 상기 제1 SOH 및 상기 제2 SOH에 기반하여 상기 배터리 뱅크의 SOH를 추정하도록 구성된 제어부를 포함하는 배터리 관리 장치.
- 제1항에 있어서,상기 제어부는,상기 측정된 전류를 적산하여 상기 배터리 뱅크의 충전 용량을 산출하고, 산출된 충전 용량에 기반하여 상기 배터리 뱅크의 제1 SOH를 추정하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 제어부는,상기 충전 종료 시점부터 상기 배터리 뱅크의 전압에 기반하여 상기 순환 전류가 흐르는 시간을 산출하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 제어부는,상기 순환 전류가 흐르는 시간에 대응되는 SOH값이 미리 설정된 SOH 테이블을 이용하여 상기 시간에 대응되는 상기 제2 SOH를 결정하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 제어부는,상기 순환 전류가 흐르는 시간 및 상기 순환 전류가 흐른 후 상기 배터리 뱅크의 전압에 대응되는 SOH값이 미리 설정된 SOH 테이블을 이용하여, 상기 충전 종료 시점의 상기 배터리 뱅크의 전압과 상기 시간에 대응되는 상기 제2 SOH를 결정하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 제어부는,상기 제1 SOH와 상기 제2 SOH의 차이를 계산하여 제3 SOH를 산출하고, 산출된 제3 SOH를 상기 배터리 뱅크의 SOH로 추정하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 제어부는,상기 제1 SOH와 이전에 추정된 상기 배터리 뱅크의 SOH의 차이가 미리 설정된 임계값 이상인 경우, 상기 제2 SOH를 결정하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 복수의 배터리 셀은, 서로 병렬로 연결되도록 구성된 배터리 관리 장치.
- 제1항 내지 제8항 중 어느 한 항에 따른 배터리 관리 장치를 포함하는 배터리 팩.
- 제1항 내지 제8항 중 어느 한 항에 따른 배터리 관리 장치를 포함하는 자동차.
- 복수의 배터리 셀을 포함하는 배터리 뱅크의 충전 과정에서, 상기 배터리 뱅크의 전압 및 전류를 측정하는 측정 단계;상기 측정된 전류를 적산한 충전 용량에 기반하여 상기 배터리 뱅크의 제1 SOH를 추정하는 제1 SOH 추정 단계;상기 배터리 뱅크의 충전 종료 시점부터 상기 복수의 배터리 셀에 순환 전류가 흐르는 시간에 기반하여 제2 SOH를 결정하는 제2 SOH 결정 단계; 및상기 제1 SOH 및 상기 제2 SOH에 기반하여 상기 배터리 뱅크의 SOH를 추정하는 SOH 추정 단계를 포함하는 배터리 관리 방법.
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| KR20200109092A (ko) * | 2019-03-12 | 2020-09-22 | 삼성에스디아이 주식회사 | 배터리 건강 상태 추정 방법 |
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| JP7234511B2 (ja) * | 2018-06-01 | 2023-03-08 | マツダ株式会社 | バッテリ容量推定装置、およびバッテリ容量推定方法 |
| KR20240002404A (ko) * | 2022-06-29 | 2024-01-05 | 주식회사 모큐라텍 | SoH 정보를 이용한 배터리 셀의 충방전 장치 및 방법 |
| KR20240033300A (ko) | 2015-04-28 | 2024-03-12 | 바스프 에이에스 | 비알코올성 지방간염의 예방 및/또는 치료를 위한 구조적으로 강화된 함황 지방산의 용도 |
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| KR20240033300A (ko) | 2015-04-28 | 2024-03-12 | 바스프 에이에스 | 비알코올성 지방간염의 예방 및/또는 치료를 위한 구조적으로 강화된 함황 지방산의 용도 |
| JP7234511B2 (ja) * | 2018-06-01 | 2023-03-08 | マツダ株式会社 | バッテリ容量推定装置、およびバッテリ容量推定方法 |
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| JP2021132517A (ja) * | 2020-02-21 | 2021-09-09 | 住友電気工業株式会社 | 切替装置、その装置を含む蓄電システム、そのシステムを含む車両、及び、切替方法 |
| KR20220069137A (ko) * | 2020-11-19 | 2022-05-27 | 한국전자통신연구원 | 배터리 상태 예측 장치 및 방법 |
| KR20240002404A (ko) * | 2022-06-29 | 2024-01-05 | 주식회사 모큐라텍 | SoH 정보를 이용한 배터리 셀의 충방전 장치 및 방법 |
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