WO2022149864A1 - 배터리 관리 장치 및 그것의 동작 방법 - Google Patents
배터리 관리 장치 및 그것의 동작 방법 Download PDFInfo
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- WO2022149864A1 WO2022149864A1 PCT/KR2022/000201 KR2022000201W WO2022149864A1 WO 2022149864 A1 WO2022149864 A1 WO 2022149864A1 KR 2022000201 W KR2022000201 W KR 2022000201W WO 2022149864 A1 WO2022149864 A1 WO 2022149864A1
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- Prior art keywords
- balancing
- battery
- battery cell
- cell
- resistor
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 25
- 238000007726 management method Methods 0.000 description 37
- 230000015654 memory Effects 0.000 description 15
- 229910001416 lithium ion Inorganic materials 0.000 description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 238000007599 discharging Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- -1 nickel hydrogen Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- 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
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
-
- 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
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- 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
- H02J7/0014—Circuits for equalisation of charge between batteries
-
- 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
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/22—Balancing the charge of battery modules
-
- 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
- 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
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/80—Time limits
-
- 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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
-
- 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. 10-2021-0002902 filed on January 8, 2021, and includes all contents disclosed in the literature of the Korean patent application as a part of this specification.
- Embodiments disclosed in this document relate to a battery management apparatus 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 the latest lithium ion batteries.
- lithium ion batteries have an advantage in that their energy density is much higher than that of 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 power sources for mobile devices. .
- the lithium ion battery has been attracting attention as a next-generation energy storage medium as its use range has been expanded as a power source for electric vehicles.
- a lithium ion battery is implemented with a plurality of battery cells to supply power.
- a plurality of battery cells has a voltage difference due to chemical difference, physical property difference, and aging degree difference. causes In the case of a battery cell that has undergone a lot of deterioration, the charging/discharging time is shorter than that of other battery cells, and thus the first charging or discharging state.
- various cell balancing technologies for a plurality of battery cells have been introduced.
- An object of the embodiments disclosed in this document is to provide a battery management apparatus capable of increasing the speed of a cell balancing operation and an operating method thereof.
- a battery management apparatus includes a plurality of balancing resistors connected to each of a plurality of battery cells, a common resistor connected in parallel with the plurality of balancing resistors, and the plurality of balancing resistors and the common resistor It may include a plurality of resistance switches connected therebetween, and a controller that calculates a balancing time of the plurality of battery cells and controls operations of the plurality of resistance switches based on the balancing time.
- the controller may select at least one target battery cell from among the plurality of battery cells based on a balancing time of the plurality of battery cells.
- the controller may select, as the at least one target battery cell, a battery cell having a difference of more than a reference value and a balancing time of battery cells having different balancing times among the plurality of battery cells.
- the controller may control the operation of the plurality of resistance switches such that the common resistance is electrically connected to a balancing resistor connected to the at least one target battery cell among the plurality of balancing resistors.
- the controller controls the operation of the plurality of resistance switches so that the common resistance is not electrically connected to a balancing resistor connected to battery cells other than the at least one target battery cell among the plurality of balancing resistors can do.
- it may further include a plurality of balancing switches respectively connected to the plurality of balancing resistors.
- the controller controls operations of the plurality of resistance switches such that the common resistance is electrically connected to a balancing resistor connected to the at least one target battery cell among a plurality of balancing resistors
- the plurality of balancing resistors Among the switches the balancing switch connected to the balancing resistor connected to the at least one target battery cell may be short-circuited.
- a method of operating a battery management apparatus includes calculating a balancing time of each of a plurality of battery cells, and selecting at least one target battery cell from among the plurality of battery cells based on the balancing time and controlling an operation of a resistor switch disposed between a balancing resistor connected to the at least one target battery cell among a plurality of balancing resistors and a common resistor connected in parallel to the balancing resistor.
- the selecting of at least one target battery cell from among the plurality of battery cells based on the balancing time includes balancing times of battery cells having different balancing times among the plurality of battery cells and a battery having a difference of more than a reference value.
- a cell may be selected as the at least one target battery cell.
- controlling the operation of a resistance switch disposed between a balancing resistor connected to the at least one target battery cell and a common resistor connected in parallel to the balancing resistor comprises balancing connected to the at least one target battery cell.
- the resistor switch may be short-circuited so that the resistor and the common resistor are electrically connected.
- the method may further include controlling operations of a plurality of balancing switches respectively connected to the plurality of balancing resistors.
- the controlling of the operation of the plurality of balancing switches respectively connected between the plurality of balancing resistors and the ground comprises balancing connected to the balancing resistor connected to the at least one target battery cell among the plurality of balancing switches.
- the switch can be shorted.
- a battery management apparatus and a method of operating the same may increase a cell balancing speed for battery cells, thereby rapidly resolving a cell imbalance situation.
- FIG. 1 is a view showing a battery pack according to an embodiment disclosed in this document.
- FIG. 2 is a diagram illustrating a battery management apparatus according to an exemplary embodiment disclosed in this document.
- FIG. 3 is a diagram for explaining an operation of a battery management apparatus according to an embodiment disclosed in this document.
- FIGS. 4 and 5 are flowcharts illustrating a method of operating a battery management apparatus according to an exemplary embodiment disclosed in this document.
- FIG. 6 shows a computing system for executing a method of operating a battery management device according to an embodiment disclosed in this document.
- FIG. 1 is a view showing a battery pack according to an embodiment disclosed in this document.
- a battery pack 100 may include a battery module 110 , a battery management device 120 , and a relay 130 .
- the battery module 110 may include a plurality of battery cells 111 , 112 , 113 , and 114 .
- the plurality of battery cells is illustrated as four, but the present invention is not limited thereto, and the battery module 110 may include n (n is a natural number greater than or equal to 2) battery cells.
- the battery module 110 may supply power to a target device (not shown).
- the battery module 110 may be electrically connected to the target device.
- the target device may include an electrical, electronic, or mechanical device that operates by receiving power from the battery pack 100 including a plurality of battery cells 111 , 112 , 113 , and 114 , for example.
- the target device may be an electric vehicle (EV), but is not limited thereto.
- EV electric vehicle
- the plurality of battery cells 111 , 112 , 113 , and 114 are a lithium ion (Li-ion) battery, a lithium ion polymer (Li-ion polymer) battery, a nickel cadmium (Ni-Cd) battery, and a nickel hydrogen (Ni-MH) battery. It may be a battery, and the like, but is not limited thereto. Meanwhile, although one battery module 110 is illustrated in FIG. 1 , a plurality of battery modules 110 may be configured according to an embodiment.
- the battery management device 120 may manage and/or control the state and/or operation of the battery module 110 .
- the battery management apparatus 120 may manage and/or control the states and/or operations of the plurality of battery cells 111 , 112 , 113 , and 114 included in the battery module 110 .
- the battery management device 120 may manage charging and/or discharging of the battery module 110 .
- the battery management device 120 may monitor the voltage, current, temperature, etc. of each of the plurality of battery cells 111 , 112 , 113 , 114 included in the battery module 110 and/or the battery module 110 . have.
- a sensor or various measurement modules not shown may be additionally installed in the battery module 110 , a charging/discharging path, or an arbitrary location such as the battery module 110 .
- the battery management device 120 determines a parameter indicating the state of the battery module 110, for example, SOC (State of Charge) or SOH (State of Health), etc. based on the monitored measured values such as voltage, current, and temperature. can be calculated.
- the battery management device 120 may control the operation of the relay 130 .
- the battery management device 120 may short-circuit the relay 130 to supply power to the target device.
- the battery management device 120 may short-circuit the relay 130 when the charging device is connected to the battery pack 100 .
- the battery management apparatus 120 may calculate a cell balancing time of each of the plurality of battery cells 111 , 112 , 113 , and 114 .
- the cell balancing time may be defined as a time required for balancing the battery cells.
- the battery management apparatus 120 may calculate a cell balancing time based on a state of charge (SOC), battery capacity, and balancing efficiency of each of the plurality of battery cells 111 , 112 , 113 , and 114 .
- SOC state of charge
- the battery management apparatus 120 may determine at least one cell balancing target based on a cell balancing time of each of the plurality of battery cells 111 , 112 , 113 , and 114 .
- the cell balancing target may be defined as a target battery cell. That is, the battery management apparatus 120 may select at least one target battery cell based on a cell balancing time of each of the plurality of battery cells 111 , 112 , 113 , and 114 .
- the battery management apparatus 120 may use a battery cell having a difference of more than a reference value from the balancing times of battery cells having different cell balancing times among the plurality of battery cells 111 , 112 , 113 , and 114 as at least one target battery cell. can be selected
- the battery management apparatus 120 may perform a cell balancing operation on at least one target battery cell selected as a cell balancing target among the plurality of battery cells 111 , 112 , 113 , and 114 based on the cell balancing time. For example, the battery management apparatus 120 may increase the balancing speed of the at least one target battery cell by increasing the balancing current used for the balancing operation of the at least one target battery cell.
- FIG. 2 is a block diagram illustrating a battery management apparatus according to an exemplary embodiment disclosed in this document.
- 3 is a diagram for explaining an operation of a battery management apparatus according to an embodiment disclosed in this document.
- FIG. 2 a case in which two battery cells 111 and 112 exist among the plurality of battery cells 111 , 112 , 113 and 114 is described as an example in order to facilitate understanding of the technical idea disclosed in this document.
- the technical idea disclosed in can be naturally applied to three or more battery cells.
- the battery management apparatus 120 includes a plurality of balancing resistors 121 , a common resistor 122 , a plurality of resistance switches 123 , and a plurality of balancing switches. s 124 , and a control unit 125 .
- the plurality of balancing resistors R1 and R2 121 may be respectively connected to the plurality of battery cells 111 and 112 .
- the first balancing resistor R1 may be connected to the first battery cell 111
- the second balancing resistor R2 may be connected to the second battery cell 112 .
- the first balancing resistor R1 may be connected to the positive terminal of the first battery cell 111
- the second balancing resistor R2 may be connected to the negative terminal of the second battery cell 112 .
- the common resistor Rc 122 may be connected in parallel with the plurality of balancing resistors 121 . Specifically, the common resistors Rc and 122 may be connected in parallel with the first balancing resistor R1 and the second balancing resistor R2.
- the common resistor 122 may be electrically connected to the first balancing resistor R1 and the second balancing resistor R2 through a plurality of resistance switches S1 , S2 , S3 , and S4 . That is, the common resistor 122 is connected in parallel with the first balancing resistor R1 when the first resistor switch S1 and the second resistor switch S2 are short-circuited, and the third resistor switch S3 and the fourth resistor are connected in parallel. When the switch S4 is short-circuited, it may be connected in parallel with the second balancing resistor R2.
- the plurality of resistance switches S1 , S2 , S3 , and S4 may be connected between the plurality of balancing resistors 121 and the common resistor 122 .
- the plurality of resistance switches S1 , S2 , S3 , and S4 may be opened or shorted in response to a control command received from the controller 125 .
- the plurality of resistance switches S1 , S2 , S3 , and S4 are short-circuited, the plurality of balancing resistors 121 and the common resistor 122 may be electrically connected.
- the first resistance switch S1 and the second resistance switch S2 may be opened or shorted at the same time.
- the third resistance switch S3 and the fourth resistance switch S4 may be opened or shorted at the same time.
- the plurality of balancing switches 124 may be respectively connected to the plurality of balancing resistors 121 .
- the first balancing switch SW1 may be connected in series with the first balancing resistor R1
- the second balancing switch SW2 may be connected with the second balancing resistor R2 in series.
- the first balancing switch SW1 and the second balancing switch SW2 may be opened or shorted in response to a control command received from the controller 125 .
- a closed loop is formed in which the first battery cell 111 and the first balancing resistor R1 are electrically connected to discharge the first battery cell 111 .
- a cell balancing operation for the first battery cell 111 may be performed.
- the second balancing switch SW2 is short-circuited, a closed loop is formed in which the second battery cell 112 and the second balancing resistor R2 are electrically connected to discharge the second battery cell 112 .
- a cell balancing operation with respect to the second battery cell 112 may be performed.
- the controller 125 may calculate a cell balancing time of each of the plurality of battery cells 111 , 112 , 113 , and 114 (refer to FIG. 1 ).
- the controller 125 controls the cell balancing time t1 of the first battery cells cells 1 and 111 , the cell balancing time t2 of the second battery cells cells 2 and 112 , and the third battery cell ( The cell balancing time t3 of the cells 3 and 113 and the cell balancing time tn of the n-th battery cells cells 4 and 114 may be calculated, respectively.
- the controller 125 may select at least one target battery cell based on the calculated cell balancing time.
- the controller 125 may select, as at least one target battery cell, a battery cell having a difference between the balancing time of battery cells having different balancing times and a reference value or more among the plurality of battery cells 111 , 112 , 113 , and 114 .
- the controller 125 determines that the cell balancing time t1 of the first battery cells cells 1 and 111 is determined by the second battery cells cells 2 and 112 , the third battery cells cells 3 and 113 , and When there is a difference between the cell balancing times t2, t3, and tn of each of the n-th battery cells cells 4 and 114 by more than a reference value, the first battery cells cells 1 and 111 may be selected as a target battery cell.
- the at least one target battery cell is the first battery cell (cell 1, 111), but is not limited thereto, and the cell balancing time of the second battery cell (cell 2, 112) according to an embodiment
- (t2) has a difference between the cell balancing times t2, t3, and tn of each of the third battery cells cells 3 and 113 and the n-th battery cells cells 4 and 114
- the first battery cell ( 111) and the second battery cell 112 may both be selected as target battery cells.
- the controller 125 selects a battery cell having a maximum cell balancing time and a battery cell having a minimum cell balancing time from among the plurality of battery cells 111 , 112 , 113 , and 114 , and a battery having a maximum cell balancing time.
- a cell may be selected as a target battery cell.
- the controller 125 may select, as the target battery cell, battery cells having a cell balancing time equal to or greater than a preset value among the plurality of battery cells 111 , 112 , 113 , and 114 .
- the controller 125 electrically connects the balancing resistor R1 and the common resistor Rc connected to at least one target battery cell (eg, the first battery cell 111 ) among the plurality of balancing resistors 121 .
- the operation of the plurality of resistance switches 123 may be controlled as much as possible. For example, when the first battery cell 111 is selected as the target battery cell, the controller 125 may short-circuit the first resistance switch S1 and the second resistance switch S2 . Also, the controller 125 may short-circuit the first balancing switch SW1 .
- the controller 125 controls at least one target battery cell (eg, the first battery cell 111 ) among the plurality of balancing resistors 121 , but other battery cells (eg, the second battery cell 112 ). ) may control the operation of the plurality of resistance switches 123 so that the balancing resistor R2 and the common resistor Rc are not electrically connected to each other. For example, when the first battery cell 111 is selected as the target battery cell, the controller 125 may open the third resistance switch S3 and the second resistance switch S4 .
- the control unit 125 operates the second balancing switch SW2 when cell balancing for the second battery cell 112 is required. By short-circuiting, a cell balancing operation for the second battery cell 112 may be performed.
- the first balancing resistor R1 and the common resistors Rc and 122 may be connected in parallel.
- the balancing current of the first battery cell 111 may increase. have. Accordingly, the cell balancing speed of the first battery cell 111 may increase.
- the controller 125 controls the first resistance switch S1 and the second resistance switch S2 .
- the third resistance switch S3 and the fourth resistance switch S4 may all be short-circuited.
- the first balancing resistor R1 may be connected in parallel with the common resistor 122
- the second balancing resistor R2 may also be connected in parallel with the common resistor 122 .
- the controller 125 may short-circuit both the first balancing switch SW1 and the second balancing switch SW2 . Accordingly, both the cell balancing speed of the first battery cell 111 and the second battery cell 112 may increase.
- FIGS. 4 and 5 are flowcharts illustrating a method of operating a battery management apparatus according to an exemplary embodiment disclosed in this document.
- the method of operating the battery management apparatus includes calculating a balancing time of each of a plurality of battery cells ( S110 ), among a plurality of battery cells based on the balancing time. Selecting at least one target battery cell (S120), and a resistance switch disposed between a balancing resistor connected to at least one target battery cell among a plurality of balancing resistors and a common resistor connected in parallel to the balancing resistor. It may include a controlling step (S130).
- the controller 125 may calculate a cell balancing time of each of the plurality of battery cells 111 , 112 , 113 , and 114 (refer to FIG. 1 ). For example, the controller 125 may calculate the cell balancing time based on the state of charge (SOC), battery capacity, and balancing efficiency of each of the plurality of battery cells 111 , 112 , 113 , and 114 .
- SOC state of charge
- battery capacity battery capacity
- the controller 125 may select at least one target battery cell based on the calculated cell balancing time.
- the controller 125 may select, as at least one target battery cell, a battery cell having a difference between the balancing time of battery cells having different balancing times and a reference value or more among the plurality of battery cells 111 , 112 , 113 , and 114 .
- the controller 125 selects a battery cell having a maximum cell balancing time and a battery cell having a minimum cell balancing time from among the plurality of battery cells 111 , 112 , 113 , and 114 , and a battery having a maximum cell balancing time.
- a cell may be selected as a target battery cell.
- the controller 125 may select, as the target battery cell, battery cells having a cell balancing time equal to or greater than a preset value among the plurality of battery cells 111 , 112 , 113 , and 114 .
- step S130 the controller 125 controls the balancing resistor R1 and the common resistor Rc connected to at least one target battery cell (eg, the first battery cell 111 ) among the plurality of balancing resistors 121 .
- the operation of the plurality of resistance switches 123 may be controlled to be electrically connected. For example, when the first battery cell 111 is selected as the target battery cell, the controller 125 may short-circuit the first resistance switch S1 and the second resistance switch S2 .
- the controller 125 controls at least one target battery cell (eg, the first battery cell 111 ) among the plurality of balancing resistors 121 , but other battery cells (eg, the second battery cell 112 ). ) may control the operation of the plurality of resistance switches 123 so that the balancing resistor R2 and the common resistor Rc are not electrically connected to each other. For example, when the first battery cell 111 is selected as the target battery cell, the controller 125 may open the third resistance switch S3 and the second resistance switch S4 .
- the controller 125 controls the first resistance switch S1 and the second resistance switch S2 .
- the third resistance switch S3 and the fourth resistance switch S4 may all be short-circuited.
- the first balancing resistor R1 may be connected in parallel with the common resistor 122
- the second balancing resistor R2 may also be connected in parallel with the common resistor 122 .
- the controller 125 may short-circuit both the first balancing switch SW1 and the second balancing switch SW2 .
- the embodiment shown in FIG. 5 may further include step S240 compared to the embodiment shown in FIG. 4 .
- steps S210 to S240 will be described in detail with reference to FIG. 2 .
- steps S210 and S220 may be substantially the same as steps S110 and S120 described with reference to FIG. 4 , in order to avoid duplication of description, only steps S230 and S240 will be described in detail below.
- step S230 the controller 125 controls the balancing resistor R1 and the common resistor Rc connected to at least one target battery cell (eg, the first battery cell 111 ) among the plurality of balancing resistors 121 .
- the operation of the plurality of resistance switches 123 may be controlled to be electrically connected. For example, when the first battery cell 111 is selected as the target battery cell, the controller 125 may short-circuit the first resistance switch S1 and the second resistance switch S2 .
- the controller 125 controls the first resistance switch S1 and the second resistance switch S2 .
- the third resistance switch S3 and the fourth resistance switch S4 may all be short-circuited.
- the first balancing resistor R1 may be connected in parallel with the common resistor 122
- the second balancing resistor R2 may also be connected in parallel with the common resistor 122 .
- the controller 125 may control the operation of the plurality of balancing switches 124 .
- the controller 125 may short-circuit the first balancing switch SW1.
- a cell balancing operation may be performed on the first battery cell 111 . That is, when the first resistance switch S1 and the second resistance switch S2 are short-circuited, the first balancing resistor R1 and the common resistors Rc and 122 may be connected in parallel.
- the balancing current of the first battery cell 111 may increase. have. Accordingly, the cell balancing speed of the first battery cell 111 may increase.
- control unit 125 controls the second battery cell 112 even when the first battery cell 111 is selected as the target battery cell and the third resistance switch S3 and the fourth resistance switch S4 are opened.
- a cell balancing operation for the second battery cell 112 may be performed by shorting the second balancing switch SW2 .
- the controller 125 may short-circuit both the first balancing switch SW1 and the second balancing switch SW2. have. Accordingly, both the cell balancing speed of the first battery cell 111 and the second battery cell 112 may increase.
- FIG. 6 shows a computing system implementing a battery management method according to an embodiment disclosed herein.
- the computing system 200 may include an MCU 210 , a memory 220 , an input/output I/F 230 , and a communication I/F 240 . have.
- the MCU 210 executes various programs (eg, an SOH calculation program, a cell balancing execution target determination program, etc.) stored in the memory 220 , and performs SOC and SOH of a plurality of battery cells through these programs. It may be a processor that processes various data including, and performs functions of the battery management device 120 described with reference to FIGS. 1 to 3 or a processor that executes the battery management method described with reference to FIGS. 4 and 5 . have.
- various programs eg, an SOH calculation program, a cell balancing execution target determination program, etc.
- the memory 220 may store various programs related to the calculation of the SOH of the battery cells and determination of the target for performing cell balancing. Also, the memory 220 may store various data such as SOC and SOH data of each battery cell.
- the memory 220 may be a volatile memory or a non-volatile memory.
- the volatile memory the memory 220 may be RAM, DRAM, SRAM, or the like.
- the memory 220 as a non-volatile memory ROM, PROM, EAROM, EPROM, EEPROM, flash memory, or the like may be used. Examples of the above-listed memories 220 are merely examples and are not limited to these examples.
- the input/output I/F 230 is an interface that connects between an input device (not shown) such as a keyboard, mouse, and touch panel and an output device such as a display (not shown) and the MCU 210 to transmit and receive data. can provide an input device (not shown) such as a keyboard, mouse, and touch panel and an output device such as a display (not shown) and the MCU 210 to transmit and receive data. can provide an input device (not shown) such as a keyboard, mouse, and touch panel and an output device such as a display (not shown) and the MCU 210 to transmit and receive data. can provide
- the communication I/F 230 is a configuration capable of transmitting and receiving various data to and from the server, and may be various devices capable of supporting wired or wireless communication. For example, a program or various data for calculating SOH of battery cells or determining a balancing target may be transmitted/received from an external server provided separately through the communication I/F 230 .
- the battery management method according to an embodiment disclosed in this document may be recorded in the memory 220 and executed by the MCU 210 .
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims (12)
- 복수의 배터리 셀들 각각에 연결되는 복수의 밸런싱 저항들;상기 복수의 밸런싱 저항들과 병렬 연결되는 공통 저항;상기 복수의 밸런싱 저항들과 상기 공통 저항 사이에 연결되는 복수의 저항 스위치들; 및상기 복수의 배터리 셀들의 밸런싱 타임을 산출하고, 상기 밸런싱 타임에 기초하여 상기 복수의 저항 스위치들의 동작을 제어하는 제어부를 포함하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 제어부는 상기 복수의 배터리 셀들의 밸런싱 타임에 기초하여 상기 복수의 배터리 셀들 중 적어도 하나의 타겟 배터리 셀을 선정하는 것을 특징으로 하는 배터리 관리 장치.
- 제 2 항에 있어서,상기 제어부는 상기 복수의 배터리 셀들 중 밸런싱 타임이 다른 배터리 셀들의 밸런싱 타임과 기준값 이상의 차이를 갖는 배터리 셀을 상기 적어도 하나의 타겟 배터리 셀로 선정하는 것을 특징으로 하는 배터리 관리 장치.
- 제 3 항에 있어서,상기 제어부는 상기 복수의 밸런싱 저항들 중 상기 적어도 하나의 타겟 배터리 셀과 연결된 밸런싱 저항과 상기 공통 저항이 전기적으로 연결되도록 상기 복수의 저항 스위치들의 동작을 제어하는 것을 특징으로 하는 배터리 관리 장치.
- 제 3 항에 있어서,상기 제어부는 상기 복수의 밸런싱 저항들 중 상기 적어도 하나의 타겟 배터리 셀이 아닌 다른 배터리 셀들과 연결된 밸런싱 저항과 상기 공통 저항이 전기적으로 연결되지 않도록 상기 복수의 저항 스위치들의 동작을 제어하는 것을 특징으로 하는 배터리 관리 장치.
- 제 3 항에 있어서,상기 복수의 밸런싱 저항들과 각각 연결되는 복수의 밸런싱 스위치들을 더 포함하는 것을 특징으로 하는 배터리 관리 장치.
- 제 6 항에 있어서,상기 제어부는 복수의 밸런싱 저항들 중 상기 적어도 하나의 타겟 배터리 셀과 연결된 밸런싱 저항과 상기 공통 저항이 전기적으로 연결되도록 상기 복수의 저항 스위치들의 동작을 제어하는 경우, 상기 복수의 밸런싱 스위치 중 상기 적어도 하나의 타겟 배터리 셀과 연결된 밸런싱 저항과 연결된 밸런싱 스위치를 단락시키는 것을 특징으로 하는 배터리 관리 장치.
- 복수의 배터리 셀들 각각의 밸런싱 타임을 산출하는 단계;상기 밸런싱 타임에 기초하여 상기 복수의 배터리 셀들 중 적어도 하나의 타겟 배터리 셀을 선정하는 단계; 및복수의 밸런싱 저항들 중 상기 적어도 하나의 타겟 배터리 셀에 연결되는 밸런싱 저항 및 상기 밸런싱 저항에 병렬 연결되는 공통 저항 사이에 배치되는 저항 스위치의 동작을 제어하는 단계를 포함하는 배터리 관리 장치의 동작 방법.
- 제 8 항에 있어서,상기 밸런싱 타임에 기초하여 상기 복수의 배터리 셀들 중 적어도 하나의 타겟 배터리 셀을 선정하는 단계는 상기 복수의 배터리 셀들 중 밸런싱 타임이 다른 배터리 셀들의 밸런싱 타임과 기준값 이상의 차이를 갖는 배터리 셀을 상기 적어도 하나의 타겟 배터리 셀로 선정하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제 9 항에 있어서,상기 적어도 하나의 타겟 배터리 셀에 연결되는 밸런싱 저항 및 상기 밸런싱 저항에 병렬 연결되는 공통 저항 사이에 배치되는 저항 스위치의 동작을 제어하는 단계는 상기 적어도 하나의 타겟 배터리 셀과 연결된 밸런싱 저항과 상기 공통 저항이 전기적으로 연결되도록 상기 저항 스위치를 단락시키는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제 10 항에 있어서,상기 복수의 밸런싱 저항들과 각각 연결되는 복수의 밸런싱 스위치들의 동작을 제어하는 단계를 더 포함하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제 11 항에 있어서,상기 복수의 밸런싱 저항들과 그라운드 사이에 각각 연결되는 복수의 밸런싱 스위치들의 동작을 제어하는 단계는 상기 복수의 밸런싱 스위치들 중 상기 적어도 하나의 타겟 배터리 셀과 연결된 밸런싱 저항과 연결된 밸런싱 스위치를 단락시키는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
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JP2023503453A JP7428319B2 (ja) | 2021-01-08 | 2022-01-06 | バッテリー管理装置及びその動作方法 |
EP22736841.2A EP4191821A4 (en) | 2021-01-08 | 2022-01-06 | BATTERY MANAGEMENT APPARATUS AND ITS OPERATING METHOD |
US18/024,895 US20230344248A1 (en) | 2021-01-08 | 2022-01-06 | Battery management apparatus and operating method thereof |
CN202280005675.8A CN115997137A (zh) | 2021-01-08 | 2022-01-06 | 电池管理装置及其操作方法 |
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- 2021-01-08 KR KR1020210002902A patent/KR20220100466A/ko unknown
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- 2022-01-06 WO PCT/KR2022/000201 patent/WO2022149864A1/ko active Application Filing
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- 2022-01-06 JP JP2023503453A patent/JP7428319B2/ja active Active
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JP2023534976A (ja) | 2023-08-15 |
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US20230344248A1 (en) | 2023-10-26 |
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