WO2023063630A1 - 배터리 관리 장치 및 그것의 동작 방법 - Google Patents
배터리 관리 장치 및 그것의 동작 방법 Download PDFInfo
- Publication number
- WO2023063630A1 WO2023063630A1 PCT/KR2022/014572 KR2022014572W WO2023063630A1 WO 2023063630 A1 WO2023063630 A1 WO 2023063630A1 KR 2022014572 W KR2022014572 W KR 2022014572W WO 2023063630 A1 WO2023063630 A1 WO 2023063630A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- relay
- battery
- battery packs
- relays
- voltage
- Prior art date
Links
- 238000011017 operating method Methods 0.000 title claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000015654 memory Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/10—Measuring sum, difference or ratio
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
-
- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
-
- 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
- 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
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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 claims the benefit of priority based on Korean Patent Application No. 10-2021-0137791 filed on October 15, 2021, and includes all contents disclosed in the literature of the Korean patent application as part of this specification.
- Embodiments disclosed in this document relate to a battery management device and an operating method thereof.
- the secondary battery is a battery capable of charging and discharging, and includes all of the conventional Ni/Cd batteries, Ni/MH batteries, and recent lithium ion batteries.
- lithium ion batteries have the advantage of much higher energy density than conventional Ni/Cd batteries and Ni/MH batteries.
- lithium ion batteries can be manufactured in a small size and light weight, so they are used as a power source for mobile devices. Recently, the use range has been expanded as a power source for electric vehicles, and it is attracting attention as a next-generation energy storage medium.
- One object of the embodiments disclosed in this document is to determine whether a relay is stuck among relays included in a plurality of battery packs connected in parallel, and to determine which relay included in a plurality of battery packs connected in parallel is stuck. It is to provide a battery management device and an operating method thereof.
- An apparatus for battery management includes a measuring unit that measures voltages or currents of a plurality of battery packs connected in parallel, and relays of the plurality of battery packs based on the measured voltages of the plurality of battery packs. Controls the operation of a calculation unit that calculates a difference in voltage between both ends and a relay included in each of the plurality of battery packs, and controls the operation of the relay included in each of the plurality of battery packs and the voltage across the relay of the plurality of battery packs. and a controller configured to determine whether a relay of each of the plurality of packs is stuck based on the difference between and the measured currents of the plurality of battery packs.
- the calculation unit may calculate a first voltage that is a voltage difference between both ends of the first relay among the relays of the plurality of battery packs.
- the controller may determine that some of the first relays included in the plurality of battery packs are stuck when the first voltage is less than or equal to a first set value.
- the controller determines that some of the first relays are stuck, the second relays of each of the plurality of battery packs are sequentially shorted, and the second relays enter the shorted battery pack ( When the in-rush current is measured, it may be determined that the first relay of the battery pack in which the in-rush current is measured is stuck.
- the calculation unit may calculate a second voltage that is a voltage difference between both ends of the second relay among the relays of the plurality of battery packs.
- the controller may determine that some of the second relays included in the plurality of battery packs are stuck when the second voltage is less than or equal to the second set value.
- the controller when it is determined that the part of the second relays are stuck, sequentially shorts the precharge relays of each of the plurality of battery packs, and precharges the shorted battery packs with the precharge relays.
- the controller when the current is measured, it may be determined that the second relay of the battery pack in which the precharge current is measured is stuck.
- the relay may include a first relay and a second relay, the first relay may be a main relay, and the second relay may be a negative relay.
- the battery management device may be included in any one of the plurality of battery packs.
- the battery management device may be included in an upper controller of the plurality of battery packs.
- An operating method of a battery management device includes measuring voltages or currents of a plurality of battery packs connected in parallel, and measuring voltages of the plurality of battery packs based on the measured voltages of the plurality of battery packs. Calculating a difference in voltage across the relay and controlling the operation of the relay included in each of the plurality of battery packs, the operation of the relay included in each of the plurality of battery packs, the relay across the plurality of battery packs. The method may include determining whether a relay of each of the plurality of packs is stuck based on the voltage difference and the measured current of the plurality of battery packs.
- calculating a difference in voltage between relays of the plurality of battery packs based on the measured voltages of the plurality of battery packs may include a voltage across a first relay among relays of the plurality of battery packs. A first voltage that is the difference may be calculated.
- some first relays included in the plurality of battery packs are determined to be stuck. Determining that the part of the first relays are stuck, sequentially shorting the second relays of each of the plurality of battery packs and in-rushing the second relays to the shorted battery pack When the current is measured, determining that the first relay of the battery pack where the inrush current is measured is stuck.
- calculating a difference between voltages across relays of the plurality of battery packs based on the measured voltages of the plurality of battery packs may include voltage across a second relay among relays of the plurality of battery packs. A second voltage that is the difference may be calculated.
- some second relays included in the plurality of battery packs are determined to be stuck. determining that some of the second relays are stuck, sequentially shorting pre-charge relays of each of the plurality of battery packs, and measuring a pre-charge current in the battery packs in which the pre-charge relays are short-circuited. In this case, determining that the second relay of the battery pack for which the precharge current is measured is stuck.
- An apparatus for battery management and an operating method thereof may determine whether at least one relay among relays included in a plurality of battery packs connected in parallel is stuck, and may determine whether a plurality of batteries connected in parallel are stuck. It may be determined whether a relay included in a battery pack among the packs is stuck.
- An apparatus for battery management and an operating method thereof may determine whether a main relay or a negative relay included in a plurality of battery packs connected in parallel is stuck.
- FIG. 1 is a diagram showing a plurality of battery packs and a battery management device according to an embodiment disclosed in this document.
- FIG. 2 is a diagram showing a battery pack in detail according to an embodiment disclosed in this document.
- FIG. 3 is a block diagram showing a battery management device according to an embodiment disclosed in this document.
- FIG. 4 is a flowchart illustrating an operating method of a battery management device according to an exemplary embodiment disclosed in this document.
- FIG 5 and 6 are flowcharts showing in detail an operating method of the battery management device according to an embodiment disclosed in this document.
- FIG. 7 is a block diagram illustrating a hardware configuration of a computing system for performing a method of operating a battery management device according to an exemplary embodiment disclosed herein.
- FIG. 1 is a diagram showing a plurality of battery packs and a battery management device according to an embodiment disclosed in this document.
- a plurality of battery packs 1 may include a plurality of battery packs.
- the plurality of battery packs 1 may include a first battery pack 10 , a second battery pack 20 , and an nth battery pack 30 .
- the plurality of battery packs 1 are illustrated as including three battery packs, but are not limited thereto, and the plurality of battery packs 1 may include n (n is a natural number equal to or greater than 2) battery packs. there is.
- a plurality of battery packs 1 may be connected in parallel.
- the first battery pack 10 , the second battery pack 20 , and the nth battery pack 30 may be connected in parallel to each other. Since the plurality of battery packs 1 are connected in parallel, the voltage of the output terminal of the plurality of battery packs 1 is the voltage of the output terminal of the first battery pack 10, the voltage of the output terminal of the second battery pack 20, and the second battery pack 20. n It may be the same as the voltage of the output terminal of the battery pack 30 .
- the battery management device 100 may control a plurality of battery packs 1 .
- the battery management device 100 may control each of the battery packs 10 , 20 , and 30 included in the plurality of battery packs 1 .
- the battery management device 100 may be included in any one of the plurality of battery packs 1 .
- the battery management device 100 may be included in the first battery pack 10 .
- the battery management device 100 may be included in the second battery pack 20 or the nth battery pack 30 .
- the battery management device 100 may be included in an upper controller (not shown) of the plurality of battery packs 1 .
- the battery management device 100 may measure voltages or currents of the plurality of battery packs 1 .
- the battery management device 100 may directly measure the voltage or current of the plurality of battery packs 1, or the voltage of each of the plurality of battery packs 1 measured by each of the plurality of battery packs 1.
- a measured value for current may be acquired.
- the battery management device 100 may calculate a first voltage, which is a voltage difference between both ends of the first relay of each of the plurality of battery packs 1, and a second voltage, which is a voltage difference between both ends of the second relay.
- the first relay may be a main relay of each of the plurality of battery packs 1
- the second relay may be a negative relay of each of the plurality of battery packs 1.
- the battery management device 100 may determine whether the first relay or the second relay included in the plurality of battery packs 1 is stuck based on the first voltage and the second voltage.
- the battery management device 100 may control relays included in the plurality of battery packs 1 .
- the battery management device 100 may control a first relay, a second relay, and a precharge relay included in each of the battery packs 10, 20, and 30 included in the plurality of battery packs 1.
- the battery management device 100 generates a control signal capable of controlling each of the relays included in the plurality of battery packs 1, and transmits the generated control signal to each of the plurality of battery packs 1.
- the battery management device 100 determines that the first relay or the second relay included in the plurality of battery packs 1 is stuck, the first relay included in any battery pack among the plurality of battery packs 1 or It can be determined whether the second relay is stuck. For example, the battery management device 100 may sequentially short-circuit relays included in a plurality of battery packs 1 to determine which battery pack has a first relay or a second relay included in the stuck state.
- the battery management device 100 may control relays included in the plurality of battery packs 1 based on information about the plurality of battery packs 1, and may control the plurality of battery packs 1. Among the relays included in (1), it can be determined which relay is stuck.
- FIG. 2 is a diagram showing a battery pack in detail according to an embodiment disclosed in this document.
- the battery pack 10 includes a battery module 11, a precharge resistor 12, a precharge relay 13, a main relay 14, and a negative relay ( 15) may be included.
- the battery pack 10 may be substantially the same as each of the battery packs 10 , 20 , and 30 included in the plurality of battery packs 1 of FIG. 1 .
- the battery module 11 may include one or more battery cells capable of being charged and discharged.
- the battery pack 10 may include a plurality of battery modules. At this time, a plurality of battery modules may be connected in series or parallel.
- the precharge resistor 12 may serve to apply a load when charging and/or discharging the battery pack 10 .
- the precharge resistor 12 controls the charging or discharging speed to balance the voltage with an external device (at least one of an inverter, converter, or capacitor). It can be a resistance to limit.
- the precharge relay 13 and the main relay 14 may form a charging and discharging path of the battery pack 10 .
- the battery pack 10 may short-circuit the pre-charge relay 13 and open the main relay 14 in the pre-charge step, and open the pre-charge relay 13 and open the main relay (14) in the main charge step. 14) can be short-circuited.
- the battery pack 10 may open both the precharge relay 13 and the main relay 14 when the battery pack 10 is not in use.
- the operations of the precharge relay 13 and the main relay 14 may be controlled by a control signal transmitted from the battery management device 100 of FIG. 1 .
- the battery management device 100 of FIG. 1 may control the operation of the precharge relay 13 or the main relay 14 .
- the negative relay 15 may connect the ground of the battery pack 10 and the battery module 11 .
- the battery management device may measure the voltage of both ends of the first relay (main relay 14 ).
- the battery management device may obtain the voltage of both ends of the first relay (main relay 14 ) measured by the battery pack 10 .
- the battery management device may measure the voltage of both ends of the second relay (negative relay 15 ).
- the battery management device may obtain the voltage of both ends of the second relay (negative relay 15 ) measured by the battery pack 10 .
- the battery pack 10 may include a sensor for measuring current or voltage of the battery pack 10 .
- the sensor may transfer the measured current or voltage to the battery management device (the battery management device 100 of FIG. 1 ).
- the battery management device (the battery management device 100 of FIG. 1 ) monitors the voltage, current, temperature, etc. of the battery pack 10 and controls and manages the battery pack 10 to prevent overcharging and overdischarging.
- the battery management device may determine whether the main relay 14 or the negative relay 15 is stuck.
- the battery management device (the battery management device 100 of FIG. 1 ) may be included in the battery pack 10 .
- FIG. 3 is a block diagram showing a battery management device according to an embodiment disclosed in this document.
- the battery management device 100 may include a measuring unit 110 , a calculating unit 120 and a controller 130 .
- the measurement unit 110 may measure voltages or currents of a plurality of battery packs (the plurality of battery packs 1 of FIG. 1 ) connected in parallel. For example, the measuring unit 110 may directly measure the voltage or current of each of the plurality of battery packs or may obtain the measured voltage or current of each of the plurality of battery packs. The voltage or current of the plurality of battery packs measured or obtained by the measurer 110 may be transmitted to the calculator 120 or the controller 130 .
- the calculation unit 120 may calculate a voltage difference between relays of the plurality of battery packs based on the measured voltages of the plurality of battery packs. For example, a first voltage, which is a voltage difference between first relays of a plurality of battery packs, may be calculated.
- the first relay may be a main relay.
- the calculator 120 may calculate a voltage difference across main relays of each of the plurality of battery packs.
- the calculation unit 120 may calculate a second voltage, which is a difference in voltages across second relays of the plurality of battery packs, based on the measured voltages of the plurality of battery packs.
- the second relay may be a negative relay.
- the calculator 120 may calculate a voltage difference across negative relays of each of the plurality of battery packs.
- the controller 130 may control an operation of a relay included in each of a plurality of battery packs.
- the controller 130 may control operations of a precharge relay, a first relay (main relay), and a second relay (negative relay) included in each of a plurality of battery packs.
- the controller 130 may generate a control signal for controlling a relay included in each of the plurality of battery packs, and transfer the generated control signal to each of the plurality of battery packs, so that each of the plurality of battery packs You can control the operation of the included relay.
- the controller 130 determines whether the relay of each of the plurality of battery packs is stuck based on the operation of the relay included in each of the plurality of battery packs, the difference in voltage across the relays of the plurality of battery packs, and the measured current of the plurality of battery packs. can determine whether For example, the controller 130 may be configured based on the operation of the first relay and the second relay included in each of the plurality of battery packs, the first voltage, the second voltage, the voltages of the plurality of battery packs, and the currents of the plurality of battery packs. As a result, it is possible to determine whether a relay of each of a plurality of battery packs is stuck.
- the controller 130 may determine that some of the first relays included in the plurality of battery packs are stuck when the first voltage is equal to or less than the first set value. For another example, the controller 130 may determine that some of the second relays included in the plurality of battery packs are stuck when the second voltage is less than or equal to the second set value.
- the first set value may be 50V
- the second set value may be 3V.
- the first voltage when all first relays included in the plurality of battery packs are open, the first voltage may be the voltage of the battery pack. When some of the first relays included in the plurality of battery packs are stuck, the difference between voltages across the first relays may be very small, such as 50V or less. That is, when the first voltage is equal to or less than the first set value, the controller 130 may determine that some of the first relays included in the plurality of battery packs are stuck.
- the controller 130 may sequentially short-circuit the second relays of each of the plurality of battery packs.
- the controller 130 may determine that the first relay of the battery pack whose in-rush current is measured is stuck. For example, when the second relay is short-circuited in the battery pack to which the first relay is attached, current flows through the first relay and the second relay, and thus an inrush current may be measured. That is, when an inrush current is generated in the battery pack in which the second relay is short-circuited, the controller 130 may determine that the first relay of the battery pack in which the second relay is short-circuited is stuck.
- the controller 130 opens the second relay of the battery pack in which inrush current does not occur, and the second relay of the next battery pack Relays can be shorted out.
- the controller 130 may determine that the first relay of the battery pack for which an inrush current of 100 mA or more is measured is stuck.
- a voltage difference across the second relays may be half of the voltage of the battery pack by a bias switch of the battery pack.
- the difference between voltages across the second relays may be very small, such as 3V or less. That is, the controller 130 may determine that some of the second relays included in the plurality of battery packs are stuck when the second voltage is less than or equal to the second set value.
- the controller 130 may sequentially short-circuit the pre-charge relays of each of the plurality of battery packs.
- the controller 130 may determine that the second relay of the battery pack in which the pre-charge current is measured is stuck. For example, when the pre-charge relay is short-circuited in the battery pack to which the second relay is fixed, current flows through the second relay and the pre-charge relay, so that the pre-charge current can be measured.
- the controller 130 may determine that the second relay of the battery pack in which the precharge relay is shorted is stuck. For another example, when the pre-charge relay is short-circuited and the pre-charge current does not occur in the battery pack, the controller 130 opens the pre-charge relay of the battery pack in which the pre-charge current does not occur, and operates the next battery pack. You can short the precharge relay. In one embodiment, the controller 130 may determine that the second relay of the battery pack for which the pre-charge current of 100 mA or more is measured is stuck.
- the battery management device 100 may determine whether some of the relays included in a plurality of battery packs are stuck, and a first relay included in a battery pack among the plurality of battery packs. and/or whether the second relay is stuck.
- the battery management device 100 may inform a user that a specific relay of a specific battery pack is shorted when it is determined that there is a battery pack in which the first relay and/or the second relay are shorted.
- the user can prevent accidents in advance by replacing or repairing a specific battery pack.
- the battery management device 100 may be included in any one battery pack among a plurality of battery packs. According to another embodiment, the battery management device 100 may be included in an upper controller that controls a plurality of battery packs.
- FIG. 4 is a flowchart illustrating an operating method of a battery management device according to an exemplary embodiment disclosed in this document.
- the operating method of the battery management device 100 includes measuring voltages or currents of a plurality of battery packs connected in parallel ( S110 ), the measured plurality of battery packs Calculating the difference between the voltages across the relays of the plurality of battery packs based on the voltage of (S120) and controlling the operation of the relay included in each of the plurality of battery packs, and the operation of the relay included in each of the plurality of battery packs , determining whether the relay of each of the plurality of battery packs is stuck based on the voltage difference between the relays of the plurality of battery packs and the measured current of the plurality of battery packs ( S130 ).
- the measurement unit 110 may measure the voltages or currents of the plurality of battery packs connected in parallel. For another example, the measurement unit 110 may obtain voltage or current measured in each of a plurality of battery packs.
- step S120 of calculating the difference between the voltages across the relays of the plurality of battery packs based on the measured voltages of the plurality of battery packs the calculation unit 120 calculates the plurality of battery packs measured or obtained by the measurement unit 110.
- a first voltage that is a difference between voltages across the first relays of the plurality of battery packs and a second voltage that is a difference between voltages across the second relays of the plurality of battery packs may be calculated based on the respective voltages.
- the controller 130 may control the operation of the relay included in each of the plurality of battery packs, and based on the operation of the relay included in each of the plurality of battery packs, the difference in voltage across the relay of the plurality of battery packs, and the measured current of the plurality of battery packs
- the controller 130 may control the operation of the relay included in each of the plurality of battery packs.
- the controller 130 may control operations of a pre-charge relay, a main relay, and a negative relay included in each of a plurality of battery packs.
- the controller 130 controls a plurality of battery packs based on the operation of the first relay (main relay), the operation of the second relay (negative relay), the first voltage, the second voltage, and the measured voltages and currents of the plurality of battery packs. It is possible to determine whether each relay of is stuck. For example, the controller 130 may determine whether at least one of the relays included in the plurality of battery packs is stuck based on the first voltage and the second voltage. For another example, when it is determined that at least one of the relays included in the plurality of battery packs is stuck, the controller 130 selects a relay included in a battery pack based on the operation of the first relay and the second relay. It can be judged whether it is stuck or not.
- FIG 5 and 6 are flowcharts showing in detail an operating method of the battery management device according to an embodiment disclosed in this document.
- step S210 of determining that some of the first relays included in the plurality of battery packs are stuck when the first voltage is equal to or less than the first set value the controller 130 determines that when the first voltage is equal to or less than the first set value, the plurality of first relays included in the plurality of battery packs are stuck. It may be determined that some of the first relays included in the battery pack of are stuck. For example, when all first relays included in the plurality of battery packs are open, the first voltage may be the voltage of the battery pack. Also, when some of the first relays included in the plurality of battery packs are stuck, the voltage difference between the first relays may be very small, such as 50V or less. That is, when the first voltage is equal to or less than the first set value, the controller 130 may determine that some of the first relays included in the plurality of battery packs are stuck.
- step S220 of sequentially shorting the second relays of each of the plurality of battery packs the controller 130 determines that some of the first relays (main relays) are stuck.
- the second relays (negative relays) of each of the plurality of battery packs may be sequentially shorted.
- the controller 130 may generate a control signal for controlling the second relay (negative relay) of each of the plurality of battery packs to be sequentially shorted, and transmit the generated control signal to each battery pack.
- step S230 of determining that the first relay of the battery pack in which the in-rush current is measured is stuck the controller 130 determines that the second relay is stuck.
- the controller 130 determines that the second relay is stuck.
- an in-rush current is measured in the battery pack in which the relay is short-circuited, it may be determined that the first relay of the battery pack for which the in-rush current is measured is stuck. For example, when the second relay is short-circuited in the battery pack to which the first relay is attached, current flows through the first relay and the second relay, and thus an inrush current may be measured.
- the controller 130 may determine that the first relay of the battery pack in which the second relay is short-circuited is stuck. For another example, when the second relay is shorted and inrush current does not occur in the battery pack, the controller 130 opens the second relay of the battery pack in which inrush current does not occur, and the second relay of the next battery pack Relays can be shorted out. In one embodiment, the controller 130 may determine that the first relay of the battery pack for which an inrush current of 100 mA or more is measured is stuck.
- step S310 of determining that some of the second relays included in the plurality of battery packs are stuck when the second voltage is equal to or less than the second set value the controller 130 determines that when the second voltage is equal to or less than the second set value, the plurality of second relays are included in the plurality of battery packs. It may be determined that some of the second relays (negative relays) included in the battery pack are stuck. For example, when all the second relays included in the plurality of battery packs are open, the voltage difference (second voltage) across the second relays becomes half of the voltage of the battery pack by the bias switch of the battery pack.
- a voltage difference (second voltage) across the second relays may be very small, such as 3V or less. That is, the controller 130 may determine that some of the second relays included in the plurality of battery packs are stuck when the second voltage is less than or equal to the second set value.
- step S320 of sequentially shorting the precharge relays of each of the plurality of battery packs the controller 130 determines that some of the second relays are stuck.
- Pre-charge relays of each battery pack may be sequentially shorted.
- the controller 130 may generate a control signal for sequentially shorting the precharge relay of each of the plurality of battery packs and transmit the generated control signal to each battery pack.
- the controller 130 determines that the second relay of the battery pack in which the pre-charge current is measured is stuck (S330).
- the pre-charge current is measured in the battery pack, it may be determined that the second relay of the battery pack in which the pre-charge current is measured is stuck. For example, when the pre-charge relay is short-circuited in the battery pack to which the second relay is fixed, current flows through the second relay and the pre-charge relay, so that the pre-charge current can be measured.
- the controller 130 may determine that the second relay of the battery pack in which the precharge relay is shorted is stuck. For another example, when the pre-charge relay is short-circuited and the pre-charge current does not occur in the battery pack, the controller 130 opens the pre-charge relay of the battery pack in which the pre-charge current does not occur, and operates the next battery pack. You can short the precharge relay. In one embodiment, the controller 130 may determine that the second relay of the battery pack for which the pre-charge current of 100 mA or more is measured is stuck.
- FIG. 7 is a block diagram illustrating a hardware configuration of a computing system for performing a method of operating a battery management device according to an exemplary embodiment disclosed herein.
- a computing system 1000 may include an MCU 1010, a memory 1020, an input/output I/F 1030 and a communication I/F 1040. there is.
- the MCU 1010 executes various programs (for example, a battery pack voltage or current collection program, a relay control program included in the battery pack, etc.) stored in the memory 1020, and the current of the battery pack through these programs.
- programs for example, a battery pack voltage or current collection program, a relay control program included in the battery pack, etc.
- it may be a processor that processes various types of information including voltage and performs functions of the battery management device shown in FIG. 3 described above.
- the memory 1020 may store various programs related to battery log information collection and diagnosis. Also, the memory 1020 may store various types of information such as current or voltage of the battery pack.
- the memory 1020 may be a volatile memory or a non-volatile memory.
- the memory 1020 as a volatile memory may be RAM, DRAM, SRAM, or the like.
- the memory 1020 as a non-volatile memory may be ROM, PROM, EAROM, EPROM, EEPROM, flash memory, or the like.
- the examples of the memories 1020 listed above are merely examples and are not limited to these examples.
- the input/output I/F 1030 connects an input device (not shown) such as a keyboard, mouse, or touch panel, an output device such as a display (not shown), and the MCU 1010 to transmit and receive data. can provide.
- an input device such as a keyboard, mouse, or touch panel
- an output device such as a display (not shown)
- the MCU 1010 to transmit and receive data. can provide.
- the communication I/F 1040 is a component capable of transmitting and receiving various data to and from the server, and may be various devices capable of supporting wired or wireless communication.
- the battery management device may transmit/receive information such as a relay control program included in a battery pack or current or voltage of various battery packs from a separately prepared external server through the communication I/F 1040 .
- the battery management device may externally transmit information about the battery pack including the fixed relay through the communication I/F 1040 .
- the computer program according to an embodiment disclosed in this document is recorded in the memory 1020 and processed by the MCU 1010, so that it may be implemented as a module that performs each function shown in FIG. 3, for example. there is.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Protection Of Static Devices (AREA)
Abstract
Description
Claims (15)
- 병렬 연결된 복수의 배터리 팩의 전압 또는 전류를 측정하는 측정부;상기 측정된 복수의 배터리 팩의 전압을 기초로, 상기 복수의 배터리 팩의 릴레이 양단의 전압의 차이를 산출하는 산출부; 및상기 복수의 배터리 팩 각각에 포함된 릴레이의 동작을 제어하고,상기 복수의 배터리 팩 각각에 포함된 릴레이의 동작, 상기 복수의 배터리 팩의 릴레이 양단의 전압의 차이 및 상기 측정된 복수의 배터리 팩의 전류를 기초로 상기 복수의 팩 각각의 릴레이가 고착되었는지 여부를 판단하는 컨트롤러를 포함하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 산출부는,상기 복수의 배터리 팩의 릴레이 중 제1 릴레이 양단의 전압 차이인 제1 전압을 산출하는 것을 특징으로 하는 배터리 관리 장치.
- 제 2 항에 있어서,상기 컨트롤러는,상기 제1 전압이 제1 설정값 이하인 경우 상기 복수의 배터리 팩에 포함된 일부의 제1 릴레이가 고착된 것으로 판단하는 것을 특징으로 하는 배터리 관리 장치.
- 제 3 항에 있어서,상기 컨트롤러는,상기 일부의 제1 릴레이가 고착된 것으로 판단한 경우,상기 복수의 배터리 팩 각각의 제2 릴레이를 순차적으로 단락시키고, 상기 제2 릴레이가 단락된 배터리 팩에 돌입(in-rush) 전류가 측정되는 경우 상기 돌입 전류가 측정된 배터리 팩의 제1 릴레이가 고착된 것으로 판단하는 것을 특징으로 하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 산출부는,상기 복수의 배터리 팩의 릴레이 중 제2 릴레이 양단의 전압 차이인 제2 전압을 산출하는 것을 특징으로 하는 배터리 관리 장치.
- 제 5 항에 있어서,상기 컨트롤러는,상기 제2 전압이 제2 설정값 이하인 경우 상기 복수의 배터리 팩에 포함된 일부의 제2 릴레이가 고착된 것으로 판단하는 것을 특징으로 하는 배터리 관리 장치.
- 제 6 항에 있어서,상기 컨트롤러는,상기 일부의 제2 릴레이가 고착된 것으로 판단한 경우,상기 복수의 배터리 팩 각각의 프리차지 릴레이를 순차적으로 단락시키고, 상기 프리차지 릴레이가 단락된 배터리 팩에 프리차지 전류가 측정되는 경우 상기 프리차지 전류가 측정된 배터리 팩의 제2 릴레이가 고착된 것으로 판단하는 것을 특징으로 하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 릴레이는 제1 릴레이 및 제2 릴레이를 포함하고,상기 제1 릴레이는 메인 릴레이이고, 상기 제2 릴레이는 네거티브 릴레이인 것을 특징으로 하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 배터리 관리 장치는 상기 복수의 배터리 팩 중 어느 하나의 배터리 팩에 포함되는 것을 특징으로 하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 배터리 관리 장치는 상기 복수의 배터리 팩의 상위 제어기에 포함되는 것을 특징으로 하는 배터리 관리 장치.
- 병렬 연결된 복수의 배터리 팩의 전압 또는 전류를 측정하는 단계;상기 측정된 복수의 배터리 팩의 전압을 기초로, 상기 복수의 배터리 팩의 릴레이 양단의 전압의 차이를 산출하는 단계; 및상기 복수의 배터리 팩 각각에 포함된 릴레이의 동작을 제어하고, 상기 복수의 배터리 팩 각각에 포함된 릴레이의 동작, 상기 복수의 배터리 팩의 릴레이 양단의 전압의 차이 및 상기 측정된 복수의 배터리 팩의 전류를 기초로 상기 복수의 팩 각각의 릴레이가 고착되었는지 여부를 판단하는 단계; 를 포함하는 배터리 관리 장치의 동작 방법.
- 제 11 항에 있어서,상기 측정된 복수의 배터리 팩의 전압을 기초로, 상기 복수의 배터리 팩의 릴레이 양단의 전압의 차이를 산출하는 단계는,상기 복수의 배터리 팩의 릴레이 중 제1 릴레이 양단의 전압 차이인 제1 전압을 산출하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제 12 항에 있어서,상기 복수의 배터리 팩 각각의 릴레이의 단락 여부를 판단하는 단계는,상기 제1 전압이 제1 설정값 이하인 경우 상기 복수의 배터리 팩에 포함된 일부의 제1 릴레이가 고착된 것으로 판단하는 단계;상기 일부의 제1 릴레이가 고착된 것으로 판단한 경우, 상기 복수의 배터리 팩 각각의 제2 릴레이를 순차적으로 단락시키는 단계; 및상기 제2 릴레이가 단락된 배터리 팩에 돌입(in-rush) 전류가 측정되는 경우 상기 돌입 전류가 측정된 배터리 팩의 제1 릴레이가 고착된 것으로 판단하는 단계; 를 포함하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제 11 항에 있어서,상기 측정된 복수의 배터리 팩의 전압을 기초로, 상기 복수의 배터리 팩의 릴레이 양단의 전압의 차이를 산출하는 단계는,상기 복수의 배터리 팩의 릴레이 중 제2 릴레이 양단의 전압 차이인 제2 전압을 산출하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제 14 항에 있어서,상기 복수의 배터리 팩 각각의 릴레이의 단락 여부를 판단하는 단계는,상기 제2 전압이 제2 설정값 이하인 경우 상기 복수의 배터리 팩에 포함된 일부의 제2 릴레이가 고착된 것으로 판단하는 단계;상기 일부의 제2 릴레이가 고착된 것으로 판단한 경우, 상기 복수의 배터리 팩 각각의 프리차지 릴레이를 순차적으로 단락시키는 단계; 및상기 프리차지 릴레이가 단락된 배터리 팩에 프리차지 전류가 측정되는 경우 상기 프리차지 전류가 측정된 배터리 팩의 제2 릴레이가 고착된 것으로 판단하는 단계; 를 포함하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22881259.0A EP4325232A1 (en) | 2021-10-15 | 2022-09-28 | Battery management device and operating method therefor |
CN202280034286.8A CN117280229A (zh) | 2021-10-15 | 2022-09-28 | 电池管理设备及其操作方法 |
JP2023565640A JP2024519689A (ja) | 2021-10-15 | 2022-09-28 | 電池管理装置およびその動作方法 |
US18/562,007 US20240243595A1 (en) | 2021-10-15 | 2022-09-28 | Battery Management Apparatus and Operating Method Thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020210137791A KR20230054153A (ko) | 2021-10-15 | 2021-10-15 | 배터리 관리 장치 및 그것의 동작 방법 |
KR10-2021-0137791 | 2021-10-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023063630A1 true WO2023063630A1 (ko) | 2023-04-20 |
Family
ID=85988387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2022/014572 WO2023063630A1 (ko) | 2021-10-15 | 2022-09-28 | 배터리 관리 장치 및 그것의 동작 방법 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20240243595A1 (ko) |
EP (1) | EP4325232A1 (ko) |
JP (1) | JP2024519689A (ko) |
KR (1) | KR20230054153A (ko) |
CN (1) | CN117280229A (ko) |
WO (1) | WO2023063630A1 (ko) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017079496A (ja) * | 2015-10-19 | 2017-04-27 | 三菱自動車工業株式会社 | コンタクタ故障判定装置およびコンタクタ故障判定方法 |
JP2018538774A (ja) * | 2016-06-22 | 2018-12-27 | エルジー・ケム・リミテッド | 電気自動車用駆動回路及びその制御方法 |
KR20190001584A (ko) * | 2018-11-08 | 2019-01-04 | 주식회사 경신 | 양방향 컨버터의 스위치 고장 판단 장치 및 방법 |
KR20200025762A (ko) * | 2018-08-31 | 2020-03-10 | 에스케이이노베이션 주식회사 | 릴레이의 고장 진단 방법 |
KR20200075095A (ko) * | 2018-12-10 | 2020-06-26 | 현대자동차주식회사 | 차량의 배터리 시스템 및 그의 진단 방법 |
-
2021
- 2021-10-15 KR KR1020210137791A patent/KR20230054153A/ko active Search and Examination
-
2022
- 2022-09-28 JP JP2023565640A patent/JP2024519689A/ja active Pending
- 2022-09-28 WO PCT/KR2022/014572 patent/WO2023063630A1/ko active Application Filing
- 2022-09-28 CN CN202280034286.8A patent/CN117280229A/zh active Pending
- 2022-09-28 US US18/562,007 patent/US20240243595A1/en active Pending
- 2022-09-28 EP EP22881259.0A patent/EP4325232A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017079496A (ja) * | 2015-10-19 | 2017-04-27 | 三菱自動車工業株式会社 | コンタクタ故障判定装置およびコンタクタ故障判定方法 |
JP2018538774A (ja) * | 2016-06-22 | 2018-12-27 | エルジー・ケム・リミテッド | 電気自動車用駆動回路及びその制御方法 |
KR20200025762A (ko) * | 2018-08-31 | 2020-03-10 | 에스케이이노베이션 주식회사 | 릴레이의 고장 진단 방법 |
KR20190001584A (ko) * | 2018-11-08 | 2019-01-04 | 주식회사 경신 | 양방향 컨버터의 스위치 고장 판단 장치 및 방법 |
KR20200075095A (ko) * | 2018-12-10 | 2020-06-26 | 현대자동차주식회사 | 차량의 배터리 시스템 및 그의 진단 방법 |
Also Published As
Publication number | Publication date |
---|---|
US20240243595A1 (en) | 2024-07-18 |
JP2024519689A (ja) | 2024-05-21 |
KR20230054153A (ko) | 2023-04-24 |
EP4325232A1 (en) | 2024-02-21 |
CN117280229A (zh) | 2023-12-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2021049753A1 (ko) | 배터리 진단 장치 및 방법 | |
WO2020076127A1 (ko) | 배터리 관리 장치 및 방법 | |
WO2021006566A1 (ko) | 배터리 셀 진단 장치 및 방법 | |
WO2020189998A1 (ko) | 배터리 뱅크 제어 장치 및 방법 | |
WO2022025533A1 (ko) | 배터리 진단 장치 및 방법 | |
WO2022149958A1 (ko) | 배터리 제어 장치, 배터리 시스템, 전원 공급 시스템 및 배터리 제어 방법 | |
WO2022065676A1 (ko) | 배터리 저항 산출 장치 및 방법 | |
WO2023136512A1 (ko) | 배터리 충전 심도 산출 장치 및 그것의 동작 방법 | |
WO2023224211A1 (ko) | 배터리 진단 방법, 그 방법을 제공하는 배터리 진단 장치 및 배터리 시스템 | |
WO2023063630A1 (ko) | 배터리 관리 장치 및 그것의 동작 방법 | |
WO2022097931A1 (ko) | 배터리 관리 장치 및 방법 | |
WO2021125678A1 (ko) | 병렬 배터리 릴레이 진단 장치 및 방법 | |
WO2023055038A1 (ko) | 배터리 팩 및 그것의 동작 방법 | |
WO2022265192A1 (ko) | 배터리 관리 장치 및 그것의 동작 방법 | |
WO2024058523A1 (ko) | 배터리 관리 장치 및 그것의 동작 방법 | |
WO2022149864A1 (ko) | 배터리 관리 장치 및 그것의 동작 방법 | |
WO2020059952A1 (ko) | 배터리의 밸런싱 장치 및 방법 | |
WO2023063685A1 (ko) | 배터리 관리 장치 및 그것의 동작 방법 | |
WO2023075244A1 (ko) | 배터리 관리 장치 및 그것의 동작 방법 | |
WO2024071916A1 (ko) | 배터리 시스템, 배터리 관리 시스템 및 배터리 관리 방법 | |
WO2023158106A1 (ko) | 배터리 관리 장치 및 그것의 동작 방법 | |
WO2023003441A1 (ko) | 배터리 관리 장치 및 방법 | |
WO2024085426A1 (ko) | 배터리 관리 장치 및 그것의 동작 방법 | |
WO2024147524A1 (ko) | 배터리 수명 추정 장치 및 방법 | |
WO2023224288A1 (ko) | 배터리 상태 관리 장치 및 그것의 동작 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22881259 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023565640 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280034286.8 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022881259 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18562007 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2022881259 Country of ref document: EP Effective date: 20231114 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |