WO2023063685A1 - 배터리 관리 장치 및 그것의 동작 방법 - Google Patents
배터리 관리 장치 및 그것의 동작 방법 Download PDFInfo
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- WO2023063685A1 WO2023063685A1 PCT/KR2022/015304 KR2022015304W WO2023063685A1 WO 2023063685 A1 WO2023063685 A1 WO 2023063685A1 KR 2022015304 W KR2022015304 W KR 2022015304W WO 2023063685 A1 WO2023063685 A1 WO 2023063685A1
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- Prior art keywords
- cell balancing
- resistor
- balancing unit
- battery
- switch
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- 238000000034 method Methods 0.000 title claims description 12
- 238000011017 operating method Methods 0.000 claims description 9
- 230000015654 memory Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 8
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
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- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
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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
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
-
- 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
-
- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- 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
- 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.
- a lithium ion battery is implemented with a plurality of battery cells to supply power.
- a voltage difference occurs between a plurality of battery cells due to differences in chemical properties, differences in physical properties, and differences in degree of deterioration. causes
- the charging and discharging time is shorter than that of other battery cells, so it is first charged or discharged.
- various cell balancing technologies for a plurality of battery cells have been introduced.
- One object of the embodiments disclosed in this document is to provide a battery management device capable of managing a resistance temperature not to increase beyond a predetermined value and an operating method thereof.
- a battery management device includes: a cell balancing unit connected to battery cells and performing balancing of the battery cells; and an auxiliary cell balancing unit connected to the battery cells and performing auxiliary balancing of the battery cells.
- a voltage divider for generating a divided voltage by dividing the voltage of the battery cell based on the temperature of the cell balancing unit and applying the generated divided voltage to the auxiliary cell balancing unit;
- a control unit controlling the cell balancing unit may be included.
- the cell balancing unit may include a first resistor and a first switch
- the auxiliary cell balancing unit may include a second resistor and a second switch
- the cell balancing unit and the auxiliary cell balancing unit may be connected in parallel.
- the voltage divider may include an NTC resistor whose resistance value is changed based on a temperature of the first resistor and a third resistor.
- control unit may short-circuit the first switch when the generated divided voltage is equal to or less than a preset value, and open the first switch when the generated divided voltage is greater than or equal to a preset value.
- the NTC resistor may be positioned to have a temperature commensurate with that of the first resistor.
- the voltage divider may apply the generated divided voltage to the second switch.
- only one of the first switch and the second switch may be shorted based on the generated divided voltage.
- the first resistor and the second resistor may have the same resistance value.
- control unit may control an operation of the cell balancing unit based on the voltage of the battery cell.
- control unit may control the operation of the cell balancing unit so that the temperature of the cell balancing unit does not exceed a preset value.
- the auxiliary cell balancing unit may perform auxiliary balancing of the battery cells when a temperature of the cell balancing unit is equal to or greater than a preset value.
- a method of operating a battery management device includes performing cell balancing of battery cells, generating a divided voltage by dividing voltages of the battery cells based on a temperature of a cell balancing unit, and The method may include applying the generated divided voltage to an auxiliary cell balancing unit, performing auxiliary balancing of the battery cells, and controlling the cell balancing unit based on the generated divided voltage.
- the cell balancing unit includes a first resistor and a first switch connected in series with the first resistor, and the auxiliary cell balancing unit includes a second resistor and a second switch connected in series with the second resistor And, the cell balancing unit and the auxiliary cell balancing unit may be connected in parallel.
- the step of controlling the cell balancing unit based on the generated divided voltage may include shorting the first switch when the generated divided voltage is equal to or less than a preset value, and the generated divided voltage is equal to the preset value In the above case, the first switch may be opened.
- the battery management device and method of operation thereof may manage the temperature of a resistor performing cell balancing not to increase beyond a preset value without adjusting the current performing passive cell balancing. .
- a battery management device and method of operation thereof detects the temperature of a resistor performing cell balancing through an NTC, distributes the voltage of a battery cell, so that another resistor different from the resistor whose temperature has risen is a cell. Balancing can be controlled.
- An apparatus for battery management and an operating method thereof may provide an efficient circuit by unifying a cell balancing unit performing cell balancing and a voltage distribution unit distributing voltage by sensing a temperature of a resistor.
- the battery management device and its operating method according to an embodiment disclosed in this document can manage the temperature of the cell balancing resistor without increasing the cell balancing time by not adjusting the cell balancing current.
- a circuit can be simply implemented by controlling the operation of the switch of the auxiliary cell balancing unit by the NTC resistance that measures the temperature.
- FIG. 1 is a diagram showing a battery pack according to an embodiment disclosed in this document.
- FIG. 2 is a block diagram showing a battery management device according to an embodiment disclosed in this document.
- 3 and 4 are diagrams for explaining the operation of the battery management device according to an embodiment disclosed in this document.
- FIG. 5 is a flowchart illustrating an operating method of a battery management device according to an exemplary embodiment disclosed in this document.
- FIG. 6 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 battery pack according to an embodiment disclosed in this document.
- a battery pack 1000 may include a battery module 100 , a battery management device 200 , and a relay 300 .
- the battery module 100 may include a plurality of battery cells 110 , 120 , 130 , and 140 . Although the number of battery cells is illustrated in FIG. 1 as four, it is not limited thereto, and the battery module 100 may include n (n is a natural number equal to or greater than 2) battery cells.
- the battery module 100 may supply power to a target device (not shown). To this end, the battery module 100 may be electrically connected to the target device.
- the target device may include an electrical, electronic, or mechanical device operated by receiving power from the battery pack 1000 including the plurality of battery cells 110, 120, 130, and 140, for example , the target device may be an electric vehicle (EV), but is not limited thereto.
- EV electric vehicle
- the plurality of battery cells 110, 120, 130, and 140 include a lithium ion (Li-ion) battery, a lithium ion polymer (Li-ion polymer) battery, a nickel cadmium (Ni-Cd) battery, a nickel hydrogen (Ni-MH) It may be a battery or the like, but is not limited thereto. Meanwhile, although FIG. 1 shows a case in which one battery module 100 is provided, a plurality of battery modules 100 may be configured according to embodiments.
- the battery management device 200 may manage and/or control the state and/or operation of the battery module 100 .
- the battery management device 200 may manage and/or control states and/or operations of the plurality of battery cells 110, 120, 130, and 140 included in the battery module 100.
- the battery management device 200 may manage charging and/or discharging of the battery module 100 .
- the battery management device 200 includes the battery pack 1000, the battery module 100, and/or the plurality of battery cells 110, 120, 130, and 140 included in the battery module 100, each of voltage, current, Temperature, insulation resistance, etc. can be monitored.
- sensors or various measurement modules may be additionally installed in a charging/discharging path or an arbitrary position such as the battery module 100.
- the battery management device 200 determines a parameter representing the state of the battery module 100, for example, State of Charge (SOC) or State of Health (SOH), based on measured values such as monitored voltage, current, and temperature. can be calculated
- the battery management device 200 may control the operation of the relay 300 .
- the battery management device 200 may short-circuit the relay 300 to supply power to the target device.
- the battery management device 200 may short-circuit the relay 300 when a charging device is connected to the battery pack 1000 .
- the battery management device 200 may control cell balancing of the plurality of battery cells 110 , 120 , 130 , and 140 .
- the battery management device 200 may determine whether cell balancing is required for at least one battery cell among the plurality of battery cells 110 , 120 , 130 , and 140 .
- the battery management device 200 may perform cell balancing of battery cells determined to require cell balancing.
- the battery management apparatus 200 may control passive cell balancing to be performed by dissipating energy of a battery cell determined to require cell balancing through a resistor (eg, a first resistor).
- a resistor eg, a first resistor
- the PCB may overheat, so the battery management device 200 sets the temperature of the resistor for cell balancing to a set temperature or higher. It can be managed so that it does not increase.
- the battery management device 200 may include an NTC capable of detecting the temperature of a resistor performing cell balancing, and the NTC may have a temperature corresponding to the temperature of a resistor (first resistor) performing cell balancing. position can be located. For example, the NTC may be positioned as close as possible to a resistor (first resistor) performing cell balancing.
- the battery management device 200 detects the temperature of the resistor (first resistor) performing cell balancing through the NTC, and when the temperature of the resistor (first resistor) performing cell balancing increases to a set temperature or higher, auxiliary balancing is performed.
- Cell balancing may be continuously performed with a resistor (second resistor).
- the auxiliary balancing resistor (second resistor) may have the same resistance value as the cell balancing resistor (first resistor).
- the battery management device 200 may perform balancing of battery cells based on a cell balancing resistor (first resistor) and an auxiliary balancing resistor (second resistor). For example, the battery management device 200 performs cell balancing through an auxiliary balancing resistor (second resistor) when the temperature of the cell balancing resistor (first resistor) is equal to or higher than a set temperature, thereby reducing the cell balancing resistor (first resistor) Can manage the temperature of, and the resistance value of the auxiliary balancing resistor (second resistor) is equal to the resistance value of the cell balancing resistor (first resistor), performing cell balancing through the cell balancing resistor (first resistor) The same current flows as in the case, so that the speed of cell balancing can be maintained.
- auxiliary balancing resistor second resistor
- FIG. 2 is a block diagram showing a battery management device according to an embodiment disclosed in this document.
- the battery management device 200 includes a cell balancing unit 210, an auxiliary cell balancing unit 220, a voltage distribution unit 230, and a control unit 240. can do.
- the battery management device 200 may be substantially the same as the battery management device 200 of FIG. 1 .
- the cell balancing unit 210 may be connected to a battery cell.
- the cell balancing unit 210 may perform balancing of battery cells.
- the cell balancing unit 210 may perform passive balancing in which energy of battery cells is consumed through resistance.
- the battery cell may be substantially the same as any one of the plurality of battery cells 110 , 120 , 130 , and 140 of FIG. 1 .
- the cell balancing unit 210 may include a first resistor for balancing battery cells. Also, the cell balancing unit 210 may include a first switch for controlling current to flow through the first resistor. For example, the first resistor and the first switch may be connected in series. For another example, the operation of the first switch may be controlled by the control unit 140 .
- the auxiliary cell balancing unit 220 may be connected to a battery cell.
- the auxiliary cell balancing unit 220 may perform auxiliary balancing of battery cells.
- the auxiliary cell balancing unit 220 may perform battery cell balancing when the temperature of the first resistor included in the cell balancing unit 210 is equal to or greater than a preset value.
- the auxiliary cell balancing unit 220 may perform battery cell balancing when the cell balancing unit 210 is unable to perform balancing.
- the auxiliary cell balancing unit 220 may include a second resistor for balancing battery cells. Also, the auxiliary cell balancing unit 220 may include a second switch for controlling current to flow through the second resistor. For example, the second resistor and the second switch may be connected in series. For another example, the second switch may be operated by a voltage applied from the voltage distributor 230 . In one embodiment, the second resistor may have the same resistance value as the first resistor. That is, the balancing current flowing when balancing is performed by the first resistor and the auxiliary balancing current flowing when auxiliary balancing is performed by the second resistor may be the same.
- the cell balancing unit 210 and the auxiliary cell balancing unit 220 may be connected in parallel.
- the voltage divider 230 may generate a divided voltage by dividing the voltage of the battery cells. For example, the voltage divider 230 may generate a divided voltage by dividing the voltage of the battery cells based on the temperature of the cell balancer 210 .
- the voltage distributor 230 may apply the generated divided voltage to the auxiliary cell balancing unit 220 .
- the voltage distributor 230 may apply the generated divided voltage to the second switch included in the auxiliary cell balancing unit 220, and the second switch may operate based on the generated divided voltage. .
- the voltage divider 230 may include an NTC resistor and a third resistor in order to distribute the voltage based on the temperature of the cell balancer 210 .
- the NTC resistor may be located at a position that can have a temperature corresponding to that of the first resistor included in the cell balancing unit 210 .
- the divided voltage generated by the voltage divider 230 may change according to the temperature of the first resistor.
- the NTC resistor and the third resistor included in the voltage divider 230 may be connected in series, and the voltage divider 230 distributes the voltage of the battery cell through the NTC resistor and the third resistor to obtain a divided voltage. can create
- the voltage divider 230 may input the generated divided voltage to the controller 240 .
- the control unit 240 may control the cell balancing unit 210 based on the generated divided voltage. For example, the control unit 240 may short-circuit the first switch included in the cell balancing unit 210 when the generated divided voltage is equal to or less than a preset value, and the cell balancing unit when the generated divided voltage is equal to or greater than the preset value.
- the first switch included in 210 may be opened.
- the first switch included in the cell balancing unit 210 and the second switch included in the auxiliary cell balancing unit 220 may be shorted.
- the first switch or the second switch may be shorted based on the divided voltage generated by the voltage divider 230 .
- the battery management device 200 there may be a case where only one of the first switch and the second switch is short-circuited.
- both the first switch and the second switch are shorted.
- both the first switch and the second switch may be opened.
- the controller 240 may control the operation of the cell balancing unit 210 based on the voltage of the battery cell. For example, when battery cells require balancing, the controller 240 may short-circuit a first switch included in the cell balancing unit 210 . For another example, when battery cells do not require balancing, the controller 240 may open a first switch included in the cell balancing unit 210 .
- control unit 240 may control the operation of the cell balancing unit 210 so that the temperature of the cell balancing unit 210 does not exceed a set temperature. For example, a divided voltage is generated in the voltage divider 230 based on the temperature of the first resistor included in the cell balancing unit 210, and the control unit 240 receiving the generated divided voltage generates the received divided voltage Based on this, the operation of the first switch included in the cell balancing unit 210 may be controlled so that the temperature of the cell balancing unit 210 does not exceed the first set temperature.
- the auxiliary cell balancing unit 220 may perform auxiliary balancing of the battery cells. For example, a divided voltage is generated in the voltage divider 230 based on the temperature of the first resistor included in the cell balancing unit 210, and the generated divided voltage is the second voltage included in the auxiliary cell balancing unit 220.
- the second switch may be short-circuited by being applied to the two switches, and thus the auxiliary cell balancing unit 220 may perform auxiliary balancing of the battery cells through the second resistor.
- the first set temperature may be equal to or higher than the second set temperature. In one embodiment, the first set temperature may be 75 degrees Celsius, and the second set temperature may be 60 degrees Celsius.
- the battery management apparatus 200 may perform battery cell balancing through the cell balancing unit 210 and the auxiliary cell balancing unit 220 .
- the battery cells needing balancing can be balanced through the cell balancing unit 210, and when the temperature of the cell balancing unit 210 is equal to or higher than a first set temperature, the cell balancing unit Balancing through 210 may be terminated.
- the battery management device 200 may perform the cell balancing unit 210 It is possible to continuously perform balancing of battery cells while managing the temperature of the battery.
- the battery management device 200 may detect the temperature of the cell balancing unit 210 through the NTC resistor included in the voltage distribution unit 230, and the cell balancing unit 210 ), the voltage of the battery cell may be distributed based on the temperature.
- the control unit 240 can control the operation of the cell balancing unit 210 based on the divided voltage and the operating state of the auxiliary cell balancing unit 220 can be determined based on the divided voltage, cell balancing Based on the temperature of the unit 210, the battery management device 200 can efficiently control the balancing operation of the battery cells by unifying them.
- 3 and 4 are diagrams for explaining the operation of the battery management device according to an embodiment disclosed in this document.
- the battery management device 200 may include a cell balancing unit 210 , an auxiliary cell balancing unit 220 , a voltage distribution unit 230 and a control unit 240 .
- the battery management device 200 may perform balancing of the battery cells 110 .
- the battery cell 110 may be substantially the same as any one of the plurality of battery cells 110 , 120 , 130 , and 140 of FIG. 1 .
- the battery management device 200 may be substantially the same as the battery management device 200 of FIG. 2 .
- the cell balancing unit 210 may include a first resistor R1 and a first switch S1.
- the first resistor R1 and the first switch S1 may be connected in series.
- the battery cell 110 may be balanced by the first resistor R1.
- the first switch S1 may be any one of a PNP-type BJT, an NPN-type BJT, and a MOSFET.
- the auxiliary cell balancing unit 220 may include a second resistor R2 and a second switch S2.
- the second resistor R2 and the second switch S2 may be connected in series.
- the battery cell 110 may be balanced by the second resistor R2.
- the second switch S2 may be any one of a PNP-type BJT, an NPN-type BJT, and a MOSFET.
- the second resistor R2 may have the same resistance value as the first resistor R1.
- the second resistor (R2) may be located at a physically far distance from the first resistor (R1) such that its temperature does not change with the temperature of the first resistor (R1).
- the cell balancing unit 210 and the auxiliary cell balancing unit 220 may be connected in parallel.
- the voltage divider 230 may include an NTC resistor and a third resistor R3.
- the NTC resistor and the third resistor R3 may be connected in series.
- the voltage of the battery cell 110 may be distributed through the NTC resistor and the third resistor R3.
- the divided voltage generated by the voltage divider 230 may be input to the controller 240 and may be applied to the second switch S2.
- the NTC resistor may have a temperature corresponding to that of the first resistor R1.
- the NTC resistor may be located at a physically close distance to the first resistor R1.
- the second switch S2 may operate based on the divided voltage generated by the voltage divider 230 .
- the second switch S2 may be opened when the generated divided voltage is less than or equal to a preset value, and the second switch S2 may be shorted when the generated divided voltage is greater than the preset value.
- the control unit 240 may receive the divided voltage generated by the voltage divider 230 and control the first switch S1 based on the generated divided voltage. For example, when the generated divided voltage is greater than or equal to a preset value, the control unit 240 may open the first switch S1, and when the generated divided voltage is less than the preset value, the controller 240 may open the first switch ( S1) can be short-circuited.
- the divided voltage at which the first switch S1 is opened and the divided voltage at which the second switch S2 is shorted may be the same.
- the divided voltage value at which the first switch S1 is open may be a first voltage value
- the divided voltage value at which the second switch S2 is shorted may be a second voltage value.
- the first voltage value may be equal to or greater than the second voltage value. That is, there may be cases in which the first switch S1 and the second switch S2 are simultaneously shorted.
- the battery cell 110 may be balanced by the cell balancing unit 210 .
- the battery cell 110 performs passive balancing through the cell balancing unit 210, a current flows through the first resistor R1 and heat energy is generated, causing the temperature to rise.
- the temperature of the first resistor R1 and the temperature of the NTC resistor may correspond to each other, and when the temperature of the NTC resistor increases, the resistance value of the NTC resistor may decrease and the divided voltage may increase.
- the control unit 240 may continuously receive the divided voltage, and may open the first switch S1 when the divided voltage increases to a predetermined value or more. Therefore, when the temperature of the first resistor R1 increases to a predetermined value (first set temperature) or more, the control unit 240 opens the first switch S1 to stop using the cell balancing unit 210.
- the temperature of the first resistor R1 increases to a predetermined value (second set temperature) or more
- the temperature of the NTC resistor may increase, and when the temperature of the NTC resistor increases, the resistance value of the NTC resistor decreases.
- the distribution voltage may increase.
- the second switch S2 receiving the divided voltage is short-circuited so that the battery cells 110 can be balanced through the auxiliary cell balancing unit 220 .
- the balancing current for balancing the battery cell 110 may be the same, and thus the auxiliary cell balancing unit 220 ) may perform balancing of the battery cells 110 at the same speed as the cell balancing unit 210 .
- the controller 240 may control the battery cells 210 to be balanced through the cell balancing unit 210 by shorting the first switch S1 again.
- the battery cell 110 when the temperature of the first resistor R1 is equal to or less than the preset value, the battery cell 110 is balanced by the cell balancing unit 210, and when the temperature of the first resistor R1 is equal to or greater than the preset value
- the battery cell 110 is balanced by the auxiliary cell balancing unit 220, it is not limited thereto.
- the temperature of the first resistor R1 is a second set temperature (eg, 60 degrees Celsius)
- the second switch S2 is shorted and the cell balancing unit 210 and the auxiliary cell balancing unit 220 are disconnected.
- Balancing of the battery cells 110 may be performed at the same time, and when the temperature of the first resistor R2 is a first set temperature (eg, 75 degrees Celsius), the controller 240 opens the first switch S1. Balancing of the battery cells 110 may be performed only by the auxiliary cell balancing unit 220 .
- a first set temperature eg, 75 degrees Celsius
- the secondary cell balancing unit is shown as one, but is not limited thereto. That is, the battery management device according to an embodiment may include a plurality of auxiliary cell balancing units, and manage the battery cells to be balanced by the plurality of auxiliary cell balancing units by dividing the temperature range of the cell balancing units.
- FIG. 5 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 apparatus 200 includes performing a cell balancing operation of battery cells ( S110 ), and determining battery cells based on the temperature of the cell balancing unit. Generating a divided voltage by dividing the voltage (S120), applying the generated divided voltage to the auxiliary cell balancing unit (S130), performing auxiliary balancing of the battery cells (S140), and based on the generated divided voltage and controlling the cell balancing unit (S150).
- the cell balancing unit 210 may perform the cell balancing operation of the battery cells.
- the cell balancing unit 210 may include a first resistor and a first switch connected in series with the first resistor, and when the first switch is shorted, the first resistor consumes energy of the battery cell, Balancing of battery cells may be performed.
- the voltage distributor 230 distributes the voltage of the battery cells based on the temperature of the cell balancing unit 210 to distribute the voltage voltage can be generated.
- the voltage divider 230 may include an NTC resistor and a third resistor having a temperature corresponding to the temperature of the first resistor included in the cell balancing unit 210, and the NTC resistor and the third resistor may be The voltage of the battery cells can be distributed through the
- the voltage dividing unit 230 may apply the generated divided voltage to the secondary cell balancing unit 220 .
- the auxiliary cell balancing unit 220 may include a second resistor and a second switch connected in series with the second resistor, and the generated divided voltage may be applied to the second switch.
- the auxiliary cell balancing unit 220 may perform auxiliary balancing of battery cells. For example, when the generated divided voltage is equal to or greater than a preset value, the auxiliary cell balancing unit 220 may perform auxiliary balancing of the battery cells through the second resistor, and when the generated divided voltage is equal to or less than the preset value, the secondary cell balancing unit 220 may perform auxiliary balancing of the battery cells. The balancing unit 220 may not perform auxiliary balancing of battery cells.
- the control unit 240 may control the cell balancing unit 210 based on the divided voltage generated by the voltage dividing unit 230 .
- the control unit 240 may short-circuit the first switch included in the cell balancing unit 210 when the generated divided voltage is equal to or less than a preset value, and the cell balancing unit when the generated divided voltage is equal to or greater than the preset value.
- the first switch included in 210 may be opened.
- FIG. 6 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 600 may include an MCU 610, a memory 620, an input/output I/F 630, and a communication I/F 640. there is.
- the MCU 610 executes various programs (eg, a battery cell balancing program, a voltage sensing program, a switch control program, etc.) stored in the memory 620, and provides various information including a distribution voltage through these programs. It may be a processor that processes and performs the functions of the battery management device shown in FIG. 2 described above.
- the memory 620 may store various programs related to battery log information collection and diagnosis. In addition, the memory 620 may store various types of information such as voltages of battery cells or distribution voltages of battery cells.
- the memory 620 may be a volatile memory or a non-volatile memory.
- the memory 620 as a volatile memory may be RAM, DRAM, SRAM, or the like.
- the memory 620 as a non-volatile memory may be ROM, PROM, EAROM, EPROM, EEPROM, flash memory, or the like. Examples of the memories 620 listed above are merely examples and are not limited to these examples.
- the input/output I/F 630 is an interface that 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 610 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 610 to transmit and receive data. can provide.
- the communication I/F 640 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 a battery cell balancing program, information such as current or voltage of a battery, and information related to battery cell balancing from a separately provided external server through the communication I/F 640.
- the computer program according to an embodiment disclosed in this document may be implemented as a module that performs, for example, each function shown in FIG. 2 by being recorded in the memory 620 and processed by the MCU 610. there is.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims (14)
- 배터리 셀에 연결되고 상기 배터리 셀의 밸런싱을 수행하는 셀 밸런싱부;상기 배터리 셀에 연결되고 상기 배터리 셀의 보조 밸런싱을 수행하는 보조 셀 밸런싱부;상기 셀 밸런싱부의 온도를 기초로 상기 배터리 셀의 전압을 분배하여 분배 전압을 생성하고, 상기 생성된 분배 전압을 상기 보조 셀 밸런싱부에 인가하는 전압 분배부; 및상기 생성된 분배 전압에 기초하여 상기 셀 밸런싱부를 제어하는 제어부를 포함하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 셀 밸런싱부는 제1 저항 및 제1 스위치를 포함하고,상기 보조 셀 밸런싱부는 제2 저항 및 제2 스위치를 포함하고,상기 셀 밸런싱부와 상기 보조 셀 밸런싱부는 병렬 연결되는 것을 특징으로 하는 배터리 관리 장치.
- 제 2 항에 있어서,상기 전압 분배부는,상기 제1 저항의 온도에 기초하여 저항 값이 변하는 NTC 저항 및 제3 저항을 포함하는 것을 특징으로 하는 배터리 관리 장치.
- 제 3 항에 있어서,상기 제어부는,상기 생성된 분배 전압이 기 설정값 이하인 경우 상기 제1 스위치를 단락시키고, 상기 생성된 분배 전압이 기 설정값 이상인 경우 상기 제1 스위치를 개방시키는 것을 특징으로 하는 배터리 관리 장치.
- 제 3 항에 있어서,상기 NTC 저항은 상기 제1 저항의 온도에 상응하는 온도를 가질 수 있도록 위치되는 것을 특징으로 하는 배터리 관리 장치.
- 제 2 항에 있어서,상기 전압 분배부는,상기 생성된 분배 전압을 상기 제2 스위치에 인가하는 것을 특징으로 하는 배터리 관리 장치.
- 제 2 항에 있어서,상기 생성된 분배 전압을 기초로 상기 제1 스위치 및 상기 제2 스위치 중 어느 하나만 단락되는 것을 특징으로 하는 배터리 관리 장치.
- 제 2 항에 있어서,상기 제1 저항 및 상기 제2 저항은 같은 저항값을 갖는 것을 특징으로 하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 제어부는,상기 배터리 셀의 전압에 기초하여 상기 셀 밸런싱부의 동작을 제어하는 것을 특징으로 하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 제어부는,상기 셀 밸런싱부의 온도가 기 설정값 이상이 되지 않도록 상기 셀 밸런싱부의 동작을 제어하는 것을 특징으로 하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 보조 셀 밸런싱부는,상기 셀 밸런싱부의 온도가 기 설정값 이상인 경우 상기 배터리 셀의 보조 밸런싱을 수행하는 것을 특징으로 하는 배터리 관리 장치.
- 배터리 셀의 셀 밸런싱을 수행하는 단계;셀 밸런싱부의 온도를 기초로 상기 배터리 셀의 전압을 분배하여 분배 전압을 생성하는 단계;상기 생성된 분배 전압을 보조 셀 밸런싱부에 인가하는 단계;상기 배터리 셀의 보조 밸런싱을 수행하는 단계; 및상기 생성된 분배 전압에 기초하여 상기 셀 밸런싱부를 제어하는 단계; 를 포함하는 배터리 관리 장치의 동작 방법.
- 제 12 항에 있어서,상기 셀 밸런싱부는 제1 저항 및 상기 제1 저항과 직렬 연결되는 제1 스위치를 포함하고,상기 보조 셀 밸런싱부는 제2 저항 및 상기 제2 저항과 직렬 연결되는 제2 스위치를 포함하고,상기 셀 밸런싱부와 상기 보조 셀 밸런싱부는 병렬 연결되는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제 13 항에 있어서,상기 생성된 분배 전압에 기초하여 상기 셀 밸런싱부를 제어하는 단계는,상기 생성된 분배 전압이 기 설정값 이하인 경우 상기 제1 스위치를 단락시키고, 상기 생성된 분배 전압이 기 설정값 이상인 경우 상기 제1 스위치를 개방시키는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
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EP22881312.7A EP4407829A4 (en) | 2021-10-15 | 2022-10-11 | BATTERY MANAGEMENT DEVICE AND METHOD FOR OPERATION THEREOF |
CN202280068101.5A CN118077116A (zh) | 2021-10-15 | 2022-10-11 | 电池管理装置及其操作方法 |
US18/701,124 US20240356346A1 (en) | 2021-10-15 | 2022-10-11 | Battery management apparatus and operating method thereof |
JP2024521857A JP2024537299A (ja) | 2021-10-15 | 2022-10-11 | 電池管理装置およびその動作方法 |
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KR1020210137790A KR20230054152A (ko) | 2021-10-15 | 2021-10-15 | 배터리 관리 장치 및 그것의 동작 방법 |
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JP2012115100A (ja) * | 2010-11-26 | 2012-06-14 | Keihin Corp | セルバランス制御装置 |
US8421412B2 (en) * | 2009-08-11 | 2013-04-16 | Samsung Sdi Co., Ltd. | Cell balancing circuit and secondary battery with cell balancing circuit |
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KR102258557B1 (ko) * | 2017-03-28 | 2021-06-01 | 주식회사 엘지에너지솔루션 | 배터리 밸런싱 시스템 및 방법 |
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JP3329858B2 (ja) * | 1991-10-30 | 2002-09-30 | テキサス インスツルメンツ インコーポレイテツド | バッテリシステム |
DE102014012067A1 (de) * | 2014-08-13 | 2016-02-18 | Daimler Ag | Batteriezellenanordnung für ein Kraftfahrzeug mit einer Schaltungsanordnung zum Ladungsausgleich und Kraftfahrzeug |
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- 2022-10-11 WO PCT/KR2022/015304 patent/WO2023063685A1/ko active Application Filing
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US8421412B2 (en) * | 2009-08-11 | 2013-04-16 | Samsung Sdi Co., Ltd. | Cell balancing circuit and secondary battery with cell balancing circuit |
JP2012115100A (ja) * | 2010-11-26 | 2012-06-14 | Keihin Corp | セルバランス制御装置 |
KR20170070525A (ko) * | 2015-12-14 | 2017-06-22 | 현대오트론 주식회사 | 자율 배터리 밸런싱 장치 및 그 방법 |
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CN118077116A (zh) | 2024-05-24 |
US20240356346A1 (en) | 2024-10-24 |
KR20230054152A (ko) | 2023-04-24 |
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