WO2023149609A1 - Module de batterie comprenant un système de gestion de batterie - Google Patents

Module de batterie comprenant un système de gestion de batterie Download PDF

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Publication number
WO2023149609A1
WO2023149609A1 PCT/KR2022/013119 KR2022013119W WO2023149609A1 WO 2023149609 A1 WO2023149609 A1 WO 2023149609A1 KR 2022013119 W KR2022013119 W KR 2022013119W WO 2023149609 A1 WO2023149609 A1 WO 2023149609A1
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WO
WIPO (PCT)
Prior art keywords
battery
signal
cell
battery cell
controller
Prior art date
Application number
PCT/KR2022/013119
Other languages
English (en)
Korean (ko)
Inventor
김철훈
Original Assignee
주식회사 부명
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020220035006A external-priority patent/KR20230118757A/ko
Application filed by 주식회사 부명 filed Critical 주식회사 부명
Publication of WO2023149609A1 publication Critical patent/WO2023149609A1/fr

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    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/30—Managing network names, e.g. use of aliases or nicknames
    • H04L61/3015—Name registration, generation or assignment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5046—Resolving address allocation conflicts; Testing of addresses
    • 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 disclosure relates to a battery module including a battery management system.
  • a battery module may include a plurality of electrically connected battery cells.
  • a plurality of battery cells may be connected in series and/or parallel to each other. Each of the plurality of battery cells may age at different rates.
  • the battery module may include a battery management system (BMS) for monitoring states of a plurality of battery cells.
  • BMS battery management system
  • the battery management system may transmit and/or receive data signals with the plurality of battery cells in order to monitor the plurality of battery cells constituting the battery module and control the operation of the battery cells.
  • the BMS and the plurality of battery cells are required to be electrically connected to each other.
  • the battery module may include a wire harness electrically connecting the BMS and each of the plurality of battery cells. As the number of battery cells constituting the battery module increases, the number and length of wire harnesses may increase. Accordingly, the design of the battery module may become complicated and heavy.
  • each battery cell is required to be assigned a unique identifier.
  • the strength of a signal decreases when passing through one battery cell, and thus a system for allocating an identifier to each of the plurality of battery cells may be complicated.
  • a battery module may include a plurality of battery cells, a master battery management system (BMS), and a bus bar.
  • the plurality of battery cells may include a first battery cell and a second battery cell.
  • the master BMS may be configured to manage the plurality of battery cells.
  • the bus bar may connect the plurality of battery cells and be electrically connected to the master BMS.
  • the first battery cell may include a secondary battery, a protection circuit, and a first cell controller.
  • the protection circuit may be configured to control charging and discharging of the secondary battery.
  • the first cell controller may be connected between the protection circuit and the secondary battery.
  • the first cell controller may be configured to receive a signal from the master BMS or transmit a signal to the master BMS through the bus bar.
  • the first cell controller may be configured to compare a target ID included in the signal received from the master BMS with an ID assigned to the first battery cell.
  • the first cell controller may be configured to perform an operation corresponding to the signal based on identifying that the target ID corresponds to the ID allocated to the first battery cell.
  • the first cell controller may be configured to amplify the signal and transmit the amplified signal to the second battery cell based on identifying that the target ID does not correspond to the ID allocated to the first battery cell.
  • a battery module may include a plurality of battery cells, a master battery management system (BMS), and a bus bar.
  • the plurality of battery cells may include a first battery cell and a second battery cell.
  • the master BMS may be configured to manage the plurality of battery cells.
  • the bus bar may connect the plurality of battery cells and be electrically connected to the master BMS.
  • the first battery cell may include a secondary battery, a protection circuit, and a first cell controller.
  • the protection circuit may be configured to control charging and discharging of the secondary battery.
  • the first cell controller may be connected between the protection circuit and the secondary battery.
  • the first cell controller may be configured to receive a signal from the master BMS or transmit a signal to the master BMS through the bus bar.
  • the first cell controller allocates an identifier (ID) including a numeric value for identifying the first battery cell to the first battery cell in the battery module. It can be configured to identify whether assigned (assigned).
  • the first cell controller may be configured to receive a first signal through the bus bar in a second state different from a first state in which the identifier is assigned to the first battery cell.
  • the first cell controller may be configured to obtain the identifier of the first battery cell based on a first numerical value included in the first signal, based on receiving the first signal.
  • the first cell controller is configured to transmit, through the bus bar, a second signal for allocating an identifier of the second battery cell to the second battery cell as a second numerical value different from the first numerical value. It can be.
  • a separate wire harness may be omitted.
  • the wire harness can be omitted so that the design is easy and the weight is light.
  • a data packet of a transmitted/received signal includes information about a transmission direction of the signal, thereby preventing collisions between different signals.
  • FIG. 1 is a schematic block diagram of a battery module, according to an embodiment.
  • FIG. 2 is a schematic block diagram of a cell controller according to an exemplary embodiment.
  • FIG 3 illustrates an example of a first battery cell constituting a battery module according to an embodiment.
  • FIG. 4 illustrates an example of a data packet of a signal transmitted and received through a cell controller of a battery module according to an embodiment.
  • FIG. 5 illustrates an example of a transmission/reception operation of data signals of a plurality of battery cells of a battery module according to an exemplary embodiment.
  • FIG. 6 shows an example of a battery module according to an embodiment.
  • FIG. 7 illustrates an example of an operation of allocating IDs to a plurality of battery cells of a battery module according to an embodiment.
  • FIG. 8 illustrates an example of an operation of a battery module when an abnormal condition of a battery cell is identified.
  • 9A to 9C illustrate an example of an operation of allocating identifiers of a plurality of battery cells of a battery module, according to an embodiment.
  • 1 is a schematic block diagram of a battery module, according to an embodiment.
  • 2 is a schematic block diagram of a cell controller according to an exemplary embodiment.
  • a battery module 100 includes a plurality of battery cells 120 serially connected to each other and a master battery management system (BMS, battery operatively coupled with the plurality of battery cells 120). management system) (110).
  • BMS master battery management system
  • a plurality of battery cells 120 may be serially connected to each other to configure the battery module 100 .
  • the plurality of battery cells 120 may operate as a driving source of the load by being connected to the load through an inverter or a pulse generator.
  • a circuit described may refer to a circuit including interconnected circuit elements to provide a specific function.
  • the plurality of battery cells 120 may be serially connected to each other.
  • the first battery cell 120-1 may be connected to the master BMS 110.
  • the second battery cell 120-2 may be connected to the first battery cell 120-2.
  • the third battery cell 120-3 may be connected to the second battery cell 120-2.
  • the first battery cell 120-1 to the n-th battery cell 120-n may be sequentially connected in series in the first direction D1.
  • the negative terminal of the first battery cell 120-1 and the positive terminal of the second battery cell 120-2 may be electrically connected.
  • a negative terminal of the second battery cell 120-2 and a positive terminal of the third battery cell 120-3 may be electrically connected.
  • the voltage of the entire system may be set as the sum of each of the battery cells 120 constituting the plurality of battery cells 120 .
  • the plurality of battery cells 120 are shown arranged in the first direction D1 , but the electrical connection of the plurality of battery cells 120 is described, and is not limited thereto.
  • the plurality of battery cells 120 may form the battery module 100 by stacking and assembling each other.
  • the master BMS 110 may be configured to control overall operations of the plurality of battery cells 120 .
  • the master BMS 110 without a separate wire harness, through a bus bar (eg, the bus bar 500 of FIG. 6) for connecting the plurality of battery cells 120, a plurality of batteries It may be configured to communicate with the plurality of cell controllers 200 of the cells 120 .
  • the master BMS 110 may be configured to acquire information about the SOH of each of the plurality of battery cells 120 through the bus bar.
  • the master BMS 110 may be configured to obtain information about voltage and/or current of each of the plurality of battery cells 120 through a bus bar.
  • the master BMS 110 through the bus bar, the plurality of battery cells 120, such as the remaining capacity (state of charge, SOC), state of health (SOH), temperature, etc. of the plurality of battery cells 120, respectively It can be configured to obtain information about the state of.
  • the master BMS 110 transmits a signal for requesting charging and/or discharging of each of the plurality of battery cells 120 through a bus bar to a plurality of cell controllers disposed in the plurality of battery cells 120. may be configured to transmit to (200).
  • the master BMS 110 may include a plurality of cell controllers 200 disposed in each of the battery cells 120 to collect information about the state of the plurality of battery cells 120 .
  • the first battery cell 120-1 may include the first cell controller 200-1 disposed in the first battery cell 120-1.
  • the second battery cell 120-2 may include a second cell controller 200-2 disposed in the second battery cell 120-2.
  • the plurality of cell controllers 200 may be disposed on power lines within the plurality of battery cells 120 .
  • the plurality of cell controllers 200 may be configured to transmit and/or receive data using a power line as a transmission medium.
  • the plurality of battery cells 120 may transmit a signal including information about each state to the master BMS 110 using the plurality of cell controllers 200 .
  • the master BMS 110 transmits a signal for requesting an operation of each of the plurality of battery cells 120 and/or a signal for requesting information on SOH of each of the plurality of battery cells 120 to a plurality of cell controllers. It can be delivered to each of the plurality of battery cells 120 using 200 .
  • the master BMS 110 may include a communication circuit 210 , a charge/discharge control circuit 220 , a monitoring circuit 230 , a notification circuit 240 and a memory 119 .
  • the communication circuit 210 may transmit and/or receive signals through the first cell controller 200 - 1 of the plurality of battery cells 120 and the bus bar.
  • the communication circuit 210 may be connected to a power line to transmit data signals to and from the battery cells 120 and to supply power.
  • the charge/discharge control circuit 220 may control charging and/or discharging of the plurality of battery cells 120 .
  • the charge/discharge control circuit 220 monitors the voltage and state of charge (SOC) of the secondary battery (eg, the secondary battery 121 of FIG. 3 ) in the plurality of battery cells 120. function, a function to control charging and discharging of the plurality of battery cells 120, and a function to prevent overcharging and overdischarging.
  • SOC state of charge
  • the monitoring circuit 230 may be configured to monitor states of the plurality of battery cells 120 .
  • the monitoring circuit 230 may notify an abnormality of the battery cells 120 through the notification circuit 240 when an abnormality occurs.
  • the notification circuit 240 may be connected to a display or a light emitting diode (LED) that transmits a visual signal.
  • the notification circuit 240 may be connected to a speaker that emits an audible signal.
  • LED light emitting diode
  • the memory 119 may be configured to store various information about the plurality of battery cells 120 .
  • the memory 119 may store a unique ID and status for each of the plurality of battery cells 120 .
  • the memory 119 may store an ID table of battery cells 120 to be described later.
  • the memory 119 may store charge/discharge records, charge capacity, and remaining life information of the battery cells 120 .
  • an ID may be assigned to each of the plurality of battery cells 120 .
  • a signal transmitted from the master BMS 110 and a signal transmitted from the battery cells 120 may include information about an ID assigned to each of the plurality of battery cells 120 .
  • the plurality of cell controllers 200 when a signal is received from the master BMS 110 to the plurality of cell controllers 200, the plurality of cell controllers 200 are configured to identify information about an ID included in the signal. can The plurality of cell controllers 200 may be configured to identify a battery cell to which the signal received from the master BMS 110 is to be received, based on the information about the identified ID.
  • the master BMS 110 when the master BMS 110 transmits a signal for requesting a designated operation to the third battery cell 120-3, the master BMS 110 allocates a signal to the third battery cell 120-3.
  • a signal including information about the identified ID may be transmitted to the first battery cell 120-1.
  • the first cell controller 200-1 disposed in the first battery cell 120-1 may be configured to receive the signal and identify information about an ID included in the signal.
  • the first cell controller 200-1 identifies that the information about the ID included in the signal does not match the information about the ID assigned to the first battery cell 120-1, and based on the identification,
  • the signal may be transmitted to the second battery cell 120-2.
  • the second cell controller 200-2 disposed in the second battery cell 120-2 may be configured to receive the signal and identify information about an ID included in the signal.
  • the second cell controller 200-2 identifies that the information about the ID included in the signal does not match the information about the ID assigned to the second battery cell 120-2, and based on the identification,
  • the signal may be transmitted to the third battery cell 120-3.
  • the third cell controller 200-3 disposed in the third battery cell 120-3 may be configured to receive the signal and identify information about an ID included in the signal.
  • the third cell controller 200-3 identifies that the ID information included in the signal matches the ID information assigned to the third battery cell 120-3, and based on the identification, the signal Can identify designated actions contained within.
  • the third cell controller 200-3 may be configured to perform one or more operations corresponding to the designated operation in order to perform the designated operation.
  • the master BMS 110 when a signal including information about the state of the first battery cell 120-1 is transmitted to the master BMS 110, the master BMS 110, through the information about the ID included in the signal , it may be identified that the signal is related to the first battery cell 120-1.
  • the plurality of battery cells 120 receive a signal including information about the charging and/or discharging signal of the first battery cell 120-1, the plurality of battery cells 120, the signal It may be identified that the signal is related to the first battery cell 120 - 1 through the ID information included in .
  • the battery module 100 since communication may be performed through a bus bar connecting the plurality of battery cells 120, transmission of communication between the master BMS 110 and the plurality of battery cells 120 and/or design for reception may be simplified.
  • the master BMS 110 when the master BMS 110 transmits a signal to a specific battery cell (eg, the second battery cell 120-2), the signal is sent to a battery cell (eg, the battery cell to which the signal is received). : It can be transmitted through a battery cell other than the second battery cell 120-2 (eg, the first battery cell 120-1).
  • a specific battery cell eg, the second battery cell 120-2
  • the signal is transmitted to at least one other battery cell (eg, the first battery cell 120-2). 1) may be transmitted to the master BMS 110 through).
  • a signal S 01 may be transmitted to the first battery cell 120-1 connected to the master BMS 110.
  • the signal S 01 may be transmitted in the first direction D1.
  • the signal S 01 is transmitted to the first battery cell 120-1 connected to the master BMS 110 and then transmitted from the first battery cell 120-1 to the second battery cell 120-2. It can be changed to signal S 12 .
  • the signal S 12 transmitted from the first battery cell 120-1 to the second battery cell 120-2 is transmitted to the second battery cell 120-2, and then the second battery cell 120-2 2) to the signal S 23 transmitted to the third battery cell 120-3.
  • the third battery cell 120-3 transmits a signal including information about the state of the third battery cell 120-3 to the master BMS 110
  • the signal is transmitted in the second direction. (D2).
  • the signal S 32 transmitted from the third battery cell 120-3 to the second battery cell 120-2 may be transmitted to the second battery cell 120-2.
  • the signal S 32 transmitted from the third battery cell 120-3 to the second battery cell 120-2 is transmitted to the second battery cell 120-2, and then the second battery cell 120-2 2) to the signal S 21 transmitted to the first battery cell 120-1.
  • the signal S 21 transmitted from the second battery cell 120-2 to the first battery cell 120-1 is transmitted to the first battery cell 120-1, and then the first battery cell 120-1 1) to the signal transmitted to the master BMS (110) (S 10 ) It can be changed.
  • the master BMS 110 may receive the signal S 10 and obtain information about the state of the third battery cell included in the signal S 10 .
  • the strength of the signal may be reduced by impedance (eg, internal resistance of the battery cell) of the battery cells 120 . Since the strength of the signal is reduced whenever the signal passes through the battery cells 120 , when the signal is transmitted through the plurality of battery cells 120 , it is necessary to maintain the strength of the signal. In addition, since signal collisions may occur when signals are transmitted in different directions, it is necessary to set the transmission direction of signals.
  • impedance eg, internal resistance of the battery cell
  • FIG 3 illustrates an example of a first battery cell constituting a battery module according to an embodiment.
  • components described for the first battery cell 120-1 may be equally applied to other battery cells.
  • the first battery cell 120-1 may include a secondary battery 121, a protection circuit 123, and a first cell controller 200-1.
  • the secondary battery 121 may store electrical energy.
  • the secondary battery 121 is a secondary battery capable of being charged with electrical energy and discharging the charged electrical energy, and may include a negative electrode material, a positive electrode material, a separator, and an electrolyte solution.
  • the first battery cell 120 - 1 may include at least one secondary battery 121 .
  • a protection circuit module (PCM) 123 is a protection circuit of the secondary battery 121 capable of preventing overdischarge, overcharge, and overcurrent of the secondary battery 121 .
  • Overcharging of the secondary battery 121 may damage the secondary battery 121 by causing internal overheating and swelling. Overdischarge of the secondary battery 121 may damage the electrode and cause failure of the secondary battery 121 .
  • the protection circuit 123 may cut off the charging circuit based on identifying that the voltage of the secondary battery 121 reaches the charging limit voltage in order to prevent damage and/or failure of the secondary battery 121, and , based on identifying that the voltage of the secondary battery 121 has reached the discharge limit voltage, the discharge circuit can be cut off.
  • the protection circuit 123 may obtain information about the state of the secondary battery 121 and provide the obtained information to the first cell controller 200 - 1 .
  • the first cell controller 200-1 is connected between the protection circuit 123 and the secondary battery 121 to receive a signal from the master BMS 110 or from the master BMS 110. It can be configured to transmit a signal.
  • the first cell controller 200-1 may be connected to a power line within the first battery cell 120-1, but is not limited thereto.
  • the first cell controller 200 - 1 may obtain information about the state of the secondary battery 121 from the protection circuit 123 .
  • information about the state of the secondary battery 121 may include information about the voltage, current, and temperature of the secondary battery 121, but is not limited thereto.
  • the first cell controller 200 - 1 may be electrically coupled to the protection circuit 123 and may receive information about the state of the secondary battery 121 from the protection circuit 123 .
  • the first cell controller 200 - 1 may be configured to transmit the received information about the state of the secondary battery 121 to the master BMS 110 .
  • the first cell controller 200-1 may receive a signal from the master BMS 110 through a bus bar (eg, the bus bar 500 of FIG. 6).
  • a bus bar eg, the bus bar 500 of FIG. 6
  • the signal sends a plurality of battery cells (eg, the plurality of first battery cells 120-1 of FIG. 1) connected to each other. Since it is passed through, the strength of the signal may decrease.
  • the signal passes through the first battery cell 120-1 and the second battery cell 120-2. It may be transferred to the third battery cell 120-3.
  • the strength of the signal may decrease due to an impedance inside the first battery cell 120-1 and an impedance inside the second battery cell 120-2.
  • the first cell controller 200-1 may identify whether the target of the signal received from the master BMS 110 is the first battery cell 120-1.
  • the signal may include information about a target ID, which is information about an ID of the first battery cell 120-1 to which the signal is to be received.
  • the first cell controller 200-1 may compare the target ID included in the signal received from the master BMS 110 with the ID assigned to the first battery cell 120-1.
  • the first cell controller 200-1 may perform an operation corresponding to the signal based on identifying that the target ID corresponds to the ID assigned to the first battery cell 120-1.
  • the first cell controller 200-1 amplifies the signal based on identifying that the target ID does not correspond to the ID assigned to the first battery cell 120-1, and then the first battery cell 120-1 1) connected to the second battery cell (eg, the second battery cell 120-2 of FIG. 1).
  • the master BMS 110 may receive the signal.
  • the signal may include information about a target ID set as an ID assigned to the first battery cell 120-1.
  • the first cell controller 200-1 of the first battery cell 120-1 identifies a target ID included in the received signal, and allocates the identified target ID to the first battery cell 120-1. It is possible to identify whether or not it corresponds to the specified ID.
  • the first cell controller 200-1 determines the state of the first battery cell 120-1. It may be configured to generate a signal including information about and transmit the generated signal to the master BMS (110).
  • the master BMS 110 may receive the signal.
  • the first cell controller 200-1 of the first battery cell 120-1 identifies a target ID included in the received signal, and allocates the identified target ID to the first battery cell 120-1. It is possible to identify whether or not it corresponds to the specified ID.
  • the first cell controller 200-1 amplifies the signal, and then the first battery cell 200-1 It may be configured to be transmitted to the second battery cell 120-2 serially connected to 120-1.
  • the second cell controller of the second battery cell 120-2 determines that the target ID included in the signal is the second battery cell 120-2.
  • a signal including information about the state of the second battery cell 120 - 2 may be generated based on identifying the ID corresponding to the ID assigned to .
  • the second cell controller 200 - 2 may be configured to transmit the generated signal to the master BMS 110 .
  • the first cell controller 200-1 includes a microprocessor 201 for controlling signal transmission and/or reception and amplifying a signal transmitted and/or received by the microprocessor 201. It may include an amplifier circuit 202 and a switch (SW) for controlling a signal transmission path.
  • a microprocessor 201 for controlling signal transmission and/or reception and amplifying a signal transmitted and/or received by the microprocessor 201. It may include an amplifier circuit 202 and a switch (SW) for controlling a signal transmission path.
  • SW switch
  • a signal transmitted and/or received by the first cell controller 200-1 may be amplified by the amplifier circuit 202 and then transmitted and/or received.
  • the switch SW When a signal is received from the outside of the first cell controller 200-1, the switch SW is closed so that the signal is received by the microprocessor 201, thereby providing a signal reception path.
  • the switch SW When a signal is transmitted from the first cell controller 200-1, the switch SW is closed so that the signal is transmitted from the microprocessor 201, thereby providing a signal transmission path.
  • the first cell controller 200 - 1 may be connected between the protection circuit 123 and the secondary battery 121 .
  • the first cell controller 200-1 includes a first terminal 125a connected to the positive electrode tab 121a of the secondary battery 121 and the first terminal 123a of the protection circuit 123. and a second terminal 125b connected to the negative electrode tab 121b of the secondary battery 121 and the second terminal 123b of the protection circuit 123 .
  • a signal transmitted to the first battery cell 120-1 may be transmitted to the first cell controller 200-1 through the first terminal 125a of the first cell controller 200-1.
  • the first cell controller 200-1 determines the potential (V 2 ) of the second terminal 125b of the first cell controller 200-1 and the first cell controller 200-1 of the first cell controller 200-1.
  • a potential (V 1 ) of stage 125a may be detected, a signal may be identified by a potential difference (V 2 -V 1 ), and the signal may be received and/or transmitted.
  • the first cell controller 200-1 when the target ID included in the received signal does not correspond to the ID assigned to the first battery cell 120-1, the first cell controller 200-1 The controller 200-1 may apply the amplified signal to the first terminal 125a of the first cell controller 200-1 in order to transmit the signal to the second battery cell 120-2.
  • the amplified signal applied to the first terminal 125a of the first cell controller 200-1 may be transmitted to the second battery cell 120-2 through the secondary battery 121. Therefore, even if the signal passes through the first battery cell 120-1, since it is amplified at the first terminal 125a of the first cell controller 200-1, the signal is transmitted through the plurality of battery cells 120 connected to each other. You can maintain a certain strength while passing.
  • a structure for transmitting and/or receiving communication signals between battery cells is simplified by a plurality of battery cells 120 connected to each other, while ensuring stability of power supply, and Signal strength using the cell controllers 200 may be maintained.
  • FIG. 4 illustrates an example of a data packet of a signal transmitted and received through a cell controller of a battery module according to an embodiment.
  • a signal transmitted and received through the plurality of cell controllers 200 of the battery module may include information for setting a direction.
  • the data packet 300 of the signal includes a start of header (SOH) 301, a direction (DIR) of the signal 302, and a target ID (TAR_ID) 303, a transmit ID (transmit ID, TX_ID) 304, a string length (length, LEN) 305, a command indicating an actual operation command (command, CMD) 306, and a payload that is transmitted data ( payload) 307 and information about a cyclic redundancy check (CRC) 308 that checks errors.
  • the transmission direction of the signal may be the first direction of FIG. 1 (eg, the first direction D1 of FIG. 1), and the DIR 302 is 1 In this case, the transmission direction of the signal may be the second direction of FIG. 1 (eg, the second direction D2 of FIG. 1 ).
  • the TX_ID 304 is an ID assigned to a battery management system (eg, the master BMS 110 of FIG. 1) or a plurality of battery cells (eg, the plurality of battery cells 120 of FIG. 1) that has transmitted the corresponding signal.
  • the TAR_ID 303 may indicate an ID assigned to the master BMS 110 or the plurality of battery cells 120 to receive the corresponding signal.
  • the CMD 306 included in the data packet 300 may include information related to a specific operation.
  • the CMD 306 includes a packet 306a including information for requesting allocation of an ID for each of the plurality of battery cells 120, previously assigned to the plurality of battery cells 120 ( A packet 306b including information for requesting reset of a preassigned ID may be included.
  • the plurality of battery cells 120 may transmit a data signal in which 1 is input in the packet 306a to the master BMS 110 to request allocation of an ID.
  • the CMD 306 may include a packet 306c including various types of information in addition to the aforementioned packets 306a and 206b.
  • the master BMS 110 transmits a data signal including information requesting information about a state of a first battery cell (eg, the first battery cell 120-1 of FIG. 1) to the first battery cell. It can be transmitted to (120-1).
  • the first battery cell 120-1 may transmit information about the state of the first battery cell 120-1 to the master BMS 110 based on receiving the data signal.
  • the one of the plurality of cell controllers may compare the DIR 302 with the ID assigned to any one of the battery cells.
  • the second cell controller 200-2 may ignore the received signal. Since the above example is a case where a signal is erroneously transmitted in a direction opposite to the transmission direction of the signal, the second cell controller 200 - 2 may ignore the received signal.
  • the second cell controller 200-2 may transmit a signal in the second direction D2. As described above, the second cell controller 200-2 may amplify and transmit the signal. In the above example, since the signal is transmitted in the transmission direction of the signal, the second cell controller 200-2 transmits the received signal to a battery cell having an ID matching TAR_ID 303. After amplifying the signal, the signal may be transmitted in the second direction D2. The signal may be sequentially transmitted to a battery cell whose TAR_ID 303 and the ID match, and an operation corresponding to the signal may be performed in the corresponding battery cell.
  • the second cell controller 200-2 when the ID assigned to the second battery cell 120-2 matches the TAR_ID 303, the second cell controller 200-2 performs a CMD included in the data packet 300 of the signal. Based on (306), a designated operation may be performed.
  • the battery module 100 including the plurality of battery cells 120 connected to each other, signal transmission and reception between the master BMS 110 and the plurality of battery cells 120 can be smoothly performed.
  • the battery module 100 may prevent signal collision due to serial connection through a signal including information about a transmission direction of the signal and a target ID.
  • FIG. 5 illustrates an example of a transmission/reception operation of data signals of a plurality of battery cells of a battery module according to an exemplary embodiment.
  • the operation shown in FIG. 5 is performed assuming that IDs are sequentially assigned to a plurality of battery cells 120 serially connected to the master BMS 110 .
  • the master BMS 110 generates a data signal 401a to transmit a data signal to the third battery cell 120-3, and transfers the generated data signal 401a to the first battery cell 120-3. It can be transmitted to the cell 120-1.
  • the data signal 401a may include target ID information, transmission ID information, and transmission direction information. Referring to FIG. 5 , the data signal 401a may include information indicating that a target ID is 3, a transmission ID is 0, and a transmission direction is a first direction D1.
  • the first battery cell 120 - 1 may receive the data signal 401b from the master BMS 110 .
  • the first cell controller of the first battery cell 120-1 eg, the first cell controller 200-1 of FIG. 1
  • the data signal 402a may include information indicating that a target ID is 3, a transmission ID is 1, and a transmission direction is the first direction D1.
  • the second battery cell 120-2 may receive the data signal 402b from the first battery cell 120-1.
  • the second cell controller eg, the second cell controller 200 - 2 of FIG. 1
  • the second cell controller 200 - 2 of the second battery cell 120 - 2 identifies information about a target ID included in the data signal 402b, It can be compared with the ID assigned to the second battery cell 120-2. Since the information on the target ID included in the data signal 402b is 3, the second cell controller 200-2 of the second battery cell 120-2 determines that the target ID is the second battery cell 120-2. ), and may transmit the data signal 403a to the third battery cell 120-3.
  • the data signal 403a may include information indicating that a target ID is 3, a transmission ID is 2, and a transmission direction is the first direction D1.
  • the third battery cell 120-3 may receive the data signal 403b from the second battery cell 120-2.
  • the third cell controller eg, the third cell controller 200-3 of FIG. 1 of the third battery cell 120-3 identifies information about the target ID included in the data signal 403b, It can be compared with the ID assigned to the third battery cell 120-3. Since the information on the target ID included in the data signal 403b is 3, the third cell controller 200-3 of the third battery cell 120-3 determines that the target ID is the third battery cell 120-3. ), and may perform an operation corresponding to the data signal 403b.
  • the first cell controller 200-1 Information included in the data signal 403b can be checked. Since the transmission ID included in the data signal 403b is 2 and the transmission direction is the first direction D1, the first cell controller 200-1 of the first battery cell 120-1 (403b) can be ignored.
  • the third battery cell 120-3 may perform an operation corresponding to information included in the data signal 403b.
  • the information included in the data signal 403b includes a request for information on the state of the third battery cell 120-3, the third battery cell 120-3 3)
  • the data signal 404a including information about the state may be transmitted to the second battery cell 120-2.
  • the data signal 404a may include information about a target ID, information about a transmission ID, and information about a transmission direction. Referring to FIG. 5 , the data signal 404a may include information indicating that a target ID is 0, a transmission ID is 3, and a transmission direction is the second direction D2.
  • the second battery cell 120-2 may receive the data signal 404b from the third battery cell 120-3.
  • the second cell controller 200-2 of the second battery cell 120-2 identifies target ID information included in the data signal 404b and allocates it to the second battery cell 120-2. ID can be compared. Since the information on the target ID included in the data signal 404b is 0, the second cell controller 200-2 of the second battery cell 120-2 determines that the target ID is the second battery cell 120-2. ), and may transmit the data signal 405a to the first battery cell 120-1.
  • the data signal 405a may include information indicating that a target ID is 0, a transmission ID is 2, and a transmission direction is the second direction D2.
  • the first battery cell 120-1 may receive the data signal 405b from the second battery cell 120-2.
  • the first cell controller 200-1 of the first battery cell 120-1 identifies target ID information included in the data signal 405b and allocates it to the first battery cell 120-1. ID can be compared. Since the information on the target ID included in the data signal 405b is 0, the first cell controller 200-1 of the first battery cell 120-1 determines that the target ID is the first battery cell 120-1. ), and may transmit the data signal 406a to the master BMS 110.
  • the data signal 406a may include information indicating that a target ID is 0, a transmission ID is 1, and a transmission direction is the second direction D2.
  • the third battery cell 120-3 when the third battery cell 120-3 receives the data signal 405b from the second battery cell 120-2, the third battery cell 120-3 The cell controller 200-3 can check the information included in the data signal 405b. Since the transmission ID included in the data signal 405b is 2 and the transmission direction is the second direction D2, the third cell controller 200-3 of the third battery cell 120-3 (405b) can be ignored.
  • the master BMS 110 may receive the data signal 406b from the first battery cell 120-1.
  • the master BMS 110 may identify information about the target ID included in the data signal 406b and compare it with the ID assigned to the master BMS 110 . Since the information on the target ID included in the data signal 406b is 0, the master BMS 110 can identify that the target ID corresponds to the ID assigned to the master BMS 110.
  • the master BMS 110 may receive the data signal 406b.
  • the second battery cell 120-2 when the second battery cell 120-2 receives the data signal 406b from the first battery cell 120-1, the second battery cell 120-2 The cell controller 200-2 can check the information included in the data signal 406b. Since the transmission ID included in the data signal 406b is 1 and the transmission direction is the second direction D2, the second cell controller 200-2 of the second battery cell 120-2 (406b) can be ignored.
  • the signal transmission structure of the master BMS 110 and the plurality of battery cells 120 connected to each other is simple through the plurality of cell controllers (eg, the plurality of cell controllers 200 of FIG. 1 ). can be performed According to an embodiment, information included in signals transmitted and received may prevent errors in signal transmission and improve accuracy.
  • FIG. 6 shows an example of a battery module according to an embodiment.
  • a battery module 100 may include a plurality of battery cells 120 , a master battery management system 110 , and a bus bar 500 .
  • the battery module 100 may include a master BMS 110 for managing a plurality of battery cells 120 .
  • the plurality of battery cells 120 and the master BMS 110 may be referred to as the plurality of battery cells 120 and the master BMS 110 described above. Contents described with reference to FIGS. 1 to 5 may be equally applied to the battery module 100 to be described below, and thus duplicate descriptions are omitted.
  • the bus bar 500 may connect a plurality of battery cells 120 .
  • the bus bar 500 may connect a positive terminal of one battery cell to a negative terminal of another battery cell.
  • the bus bar 500 shown in FIG. 6 is shown on a part of the connection line between the plurality of battery cells 120, but may be disposed on the entire connection line between the plurality of battery cells 120.
  • the bus bar 500 may be electrically connected to the master BMS 110 .
  • the master BMS 110 and at least some of the plurality of battery cells 120 may be connected to each other through the bus bar 500 .
  • the master BMS 110 may be configured to communicate with the plurality of battery cells 120 through the bus bar 500 .
  • the master BMS 110 may transmit a signal to the plurality of cell controllers 200 through the bus bar 500, and the plurality of cell controllers 200 through the bus bar 500, the master BMS A signal may be transmitted to (110).
  • the master BMS 110 transmits a signal to the second battery cell 120-2, the signal is transmitted to the second battery cell 120-2 through the bus bar 500. It can be.
  • the signal passes through the first battery cell 120-1 to the second battery cell 120-1. It may be transmitted to the battery cell 120-2.
  • the signal may include information on an ID assigned to the second battery cell 120-2 to receive the signal (eg, TAR_ID 303 of FIG. 3).
  • the first cell controller 200-1 may identify the information, amplify the received signal, and transmit it to the second battery cell 120-2.
  • the signal is transmitted from the master BMS 110 to the second battery cell 120-2.
  • the signal is transmitted directly to However, it is not limited thereto. Since the operation of transmitting and/or receiving the signal may be referred to as the operations described with reference to FIGS. 1 to 5, duplicate descriptions are omitted.
  • FIG. 7 illustrates an example of an operation of allocating IDs to a plurality of battery cells of a battery module according to an embodiment.
  • 8 illustrates an example of an operation of a battery module when an abnormal condition of a battery cell is identified.
  • Operations of the first cell controller 200-1 described with reference to FIGS. 7 and 8 are equally applicable to cell controllers of the remaining battery cells (eg, the second cell controller 200-2 of FIG. 6). can
  • the battery module (eg, the battery module 100 of FIG. 6 ) according to an embodiment allocates an ID capable of distinguishing a plurality of battery cells (eg, the plurality of battery cells 120 of FIG. 6 ), You can create a table about assigned IDs.
  • the operation of allocating IDs to the plurality of battery cells 120 to be described later is only illustrative, and is not limited thereto.
  • the master BMS 110 may transmit a request for querying IDs of the plurality of battery cells 120 to the first cell controller 200 - 1 .
  • the query may mean a request to assign a unique identification ID to each of the plurality of battery cells 120 .
  • the first cell controller 200-1 included in each of the plurality of battery cells 120 determines the unique ID of the first battery cell (eg, the first battery cell 120-1 of FIG. 6). can be assigned.
  • the assigned ID may mean an ID capable of distinguishing the plurality of battery cells 120 constituting the battery module 100 from each other.
  • the first cell controller 200-1 may transmit the assigned ID of the first battery cell 120-1 to the master BMS 110.
  • the master BMS 110 may generate an ID table of the plurality of battery cells 120 based on the received ID of the first battery cell 120 - 1 .
  • the generated ID table may be recorded and stored in the memory 119 of the master BMS 110 .
  • the master BMS 110 from each of the plurality of cell controllers (eg, the plurality of cell controllers 200 of FIG. 6) included in the plurality of battery cells 120, the plurality of battery cells 120 ) It is possible to obtain a signal including information about the ID assigned to each.
  • the signal may be transmitted through a bus bar (eg, the bus bar 500 of FIG. 6 ).
  • the master BMS 110 based on the ID assigned to the plurality of battery cells 120, the master BMS 110 identifies an abnormal state of the first battery cell 120-1 among the plurality of battery cells 120. And, when the abnormal state is identified, the user may be notified of the abnormal state.
  • the first cell controller 200-1 may update the state of the first battery cell 120-1. Operation 801 may be performed when the first cell controller 120 - 1 receives a signal requesting information about the state of the first battery cell 120 - 1 from the master BMS 110 . Also, operation 801 may be performed when state information in which the state of the first battery cell 120-1 identified by the protection circuit 123 of the first battery cell 120-1 exceeds a threshold value is identified. there is.
  • the first cell controller 200-1 may transmit a signal including information about the updated state of the first battery cell 120-1 to the master BMS 110.
  • the second cell controller 200 - 2 may transmit a signal including information about the updated state of the second battery cell 120 - 2 to the master BMS 110 .
  • the signal may be amplified and then transmitted.
  • the master BMS 110 receives a signal including information about the state of the first battery cell 120-1, and based on the received signal, the state of the first battery cell 120-1. abnormalities can be judged. For example, when the information about the voltage, current, and temperature of the first battery cell 120-1 exceeds a threshold value, the master BMS 110 sets the first battery cell 120-1 to an abnormal state. can judge
  • the master BMS 110 may record the state of the first battery cell 120-1 in the memory of the master BMS 110. there is.
  • the master BMS 110 may monitor the history of the state of the first battery cell 120-1 by recording the state of the first battery cell 120-1 in a memory.
  • the master BMS 110 may update the ID table.
  • the master BMS 110 may record the ID of the first battery cell 120-1 having an abnormal state in the ID table.
  • the master BMS 110 may report an abnormal state of the first battery cell 120-1.
  • the master BMS 110 may include a notification module capable of notifying an abnormal state of the first battery cell 120-1.
  • the master BMS 110 may include a display that displays the occurrence of an abnormality in the first battery cell 120-1 as a visual signal or a speaker that transmits an audible signal.
  • the user may check the abnormal state of the first battery cell 120 - 1 through operation 806 .
  • the user may perform a replacement operation of the first battery cell 120 - 1 in which the state abnormality is determined.
  • the user may identify the abnormal state of the first battery cell 120-1 before the load malfunction or failure occurs due to the abnormal state of the first battery cell 120-1, and the first battery cell 120-1 may 1) can be replaced.
  • the master BMS 110 may request the first cell controller 200-1 to reset the assigned ID.
  • the first cell controller 200-1 may reset the ID assigned to the first battery cell 120-1 based on receiving the request signal from the master BMS 110. After the ID allocated to the first battery cell 120-1 is reset, the master BMS 110 sends a request for allocating the ID of the first battery cell 120-1 again to the first cell controller 200-1. 1) can be sent to For example, after operation 808, the master BMS 110 may again perform one or more operations shown in FIG.
  • FIGS. 9A to 9C illustrate an example of an operation of allocating identifiers of a plurality of battery cells of a battery module, according to an embodiment. Operations shown in FIGS. 9a, 9b, and 9c may be sequentially performed.
  • each of the plurality of battery cells 120 may be assigned a unique identifier (ID).
  • ID unique identifier
  • the plurality of battery cells 120 may be identified from each other through identifiers assigned to each of the plurality of battery cells 120 .
  • a signal generated from the first cell controller 200-1 may include an ID assigned to the first battery cell 120-1.
  • the first battery cell 120-1 may be classified into a first state or a second state based on whether an identifier for identifying the first battery cell 120-1 is assigned. connect.
  • the first state may mean a state in which an identifier is assigned to the first battery cell 120-1.
  • a second state is a state in which an identifier is assigned to the first battery cell 120-1 and a state in which an identifier is assigned. can mean In other words, the second state may mean a state in which no identifier is assigned to the first battery cell 120-1 (ID: Empty).
  • the identifier may include a numerical value.
  • the numerical values described above are only examples, and are not limited thereto.
  • a signal for allocating an identifier may mean a signal including information about an identifier including a numerical value.
  • FIG. 9A shows a state in which the first battery cell 120-1 receives a first signal S1 for allocating an identifier in a second state.
  • the first signal S1 may be transmitted from the master BMS 110 to the first battery cell 120-1.
  • the cell communication module 125-1 of the first battery cell 120-1 may ignore the first signal S1. .
  • the cell communication module 125-1 of the first battery cell 120-1 may receive the first signal S1.
  • the cell communication module 125-1 of the first battery cell 120-1 may determine whether the received first signal S1 exceeds a specified threshold value T.
  • the comparator 128-1 included in the cell communication module 125-1 of the first battery cell 120-1 determines that the first signal S1 exceeds the threshold value T.
  • the first signal S1 which is an analog signal, is converted into a digital signal, and an identifier of the first battery cell 120-1 is obtained based on a first numerical value included in the first signal S1.
  • the comparator 128-1 receives the first signal S1, compares the magnitude of the received first signal S1 with the threshold value T, and determines whether the first signal S1 is When the threshold value T is exceeded, the first signal S1 may be output as a digital signal.
  • the first terminal 128-1a receives the voltage or current of the first signal S1
  • the second terminal 128-1a receives the voltage or current of the threshold T
  • the threshold A third terminal 128-1c for outputting the first signal S1 exceeding (T) as a digital signal may be included.
  • Description of the comparator 128-1 of the first battery cell 120-1 is the comparator 128-2 of the second battery cell 120-2 and the comparator of the third battery cell 120-3 ( 128-3) can be equally applied.
  • the master BMS 110 may transmit the first signal S1 having an intensity exceeding the threshold value T to the first battery cell 120-1.
  • the cell communication module 125-1 of the first battery cell 120-1 includes in the first signal S1 based on identifying that the strength of the first signal S1 exceeds the threshold value T. Based on the first numerical value, an identifier of the first battery cell 120-1 may be obtained. When the identifier is acquired, the identifier is assigned to the first battery cell 120-1, so that the first battery cell 120-1 may be converted into a first state. In the first state, even if the first battery cell 120 - 1 receives a signal for allocating an identifier, it may ignore the signal.
  • a signal transmitted through a bus bar (eg, the bus bar 500 of FIG. 6 ) to a plurality of battery cells 120 connected in series is an internal impedance of the plurality of battery cells 120 (eg, the battery cell 120).
  • the strength of the signal may be reduced by the secondary battery (eg, the impedance of the secondary battery 121 of FIG. 3 ) included in .
  • the threshold value T may be set based on the magnitude of a signal that decreases when passing through one battery cell. For example, assuming that the magnitude of a signal before passing through a battery cell is 1 and that the magnitude of a signal is reduced by 0.1 when passing through one battery cell, the threshold value T may be set to 0.1. Therefore, since the signal for allocating the identifier has a magnitude less than the threshold value T after passing through one battery cell, the plurality of battery cells 120 may pass through the signal after passing through one or more battery cells. , the identifier cannot be obtained.
  • the first signal S1 passing through the first battery cell 120-1 may be transmitted to the second battery cell 120-2 connected to the first battery cell 120-1.
  • the second cell controller 200-2 of the second battery cell 120-2 may determine whether the received first signal S1 exceeds a specified threshold value T. For example, the comparator 128-2 included in the second cell controller 200-2 of the second battery cell 120-2 determines that the first signal S1 does not exceed the threshold value T. Based on the identification, the first signal S1 can be disregarded.
  • the first signal S1 passing through the second battery cell 120-2 can be transmitted to the third battery cell 120-3 serially connected to the second battery cell 120-2, and
  • the third cell controller 200-3 of the cell 120-3 may ignore the first signal S1 based on identifying that the received first signal S1 does not exceed the specified threshold value T.
  • the second battery cell 120 - 2 receives a second signal S2 for allocating an identifier in a second state.
  • the second signal S2 may be a signal for allocating the identifier of the second battery cell 120 - 2 to a second numerical value different from the first numerical value.
  • the second signal S2 may be transmitted from the first battery cell 120-1 to the second battery cell 120-2 through the bus bar 500.
  • the cell communication module 125-1 of the first battery cell 120-1 may be switched to a transmission mode for transmitting a signal in a first state in which an identifier is assigned. In the first state in which an identifier is assigned to the second battery cell 120-2, the second cell controller 200-2 of the second battery cell 120-2 may ignore the second signal S2. there is.
  • the cell communication module 125-1 of the first battery cell 120-1 may be configured to set a second numerical value based on the first numerical value.
  • the cell communication module 125-1 of the first battery cell 120-1 may set the second numerical value by adding a designated numerical value to the first numerical value.
  • the second numerical value may be set to 2.
  • the second cell controller 200-2 of the second battery cell 120-2 may receive the second signal S2.
  • the second cell controller 200-2 of the second battery cell 120-2 may determine whether the received second signal S2 exceeds a specified threshold value T.
  • the comparator 128-2 included in the second cell controller 200-2 of the second battery cell 120-2 when the second signal S2 exceeds the threshold value T, the second signal S2, which is an analog signal, may be converted into a digital signal, and an identifier of the second battery cell 120-2 may be obtained based on a second numerical value included in the second signal S2. .
  • the first battery cell 120-1 may transmit the second signal S2 having an intensity exceeding the threshold value T to the second battery cell 120-2.
  • the second cell controller 200-2 of the second battery cell 120-2 determines that the strength of the second signal S2 exceeds the threshold value T, and determines the second signal S2.
  • An identifier of the second battery cell 120 - 2 may be obtained based on the included second numerical value. When the identifier is obtained, the identifier is assigned to the second battery cell 120-2, so that the second battery cell 120-2 can be converted into a first state. In the first state, even if the second battery cell 120 - 2 receives a signal for allocating an identifier, it may ignore the signal.
  • the second signal S2 passing through the second battery cell 120-2 may be transmitted to the third battery cell 120-3 serially connected to the second battery cell 120-2.
  • the third cell controller 200-3 of the third battery cell 120-3 may determine whether the received second signal S2 exceeds a specified threshold value T. For example, the comparator 128-3 included in the third cell controller 200-3 of the third battery cell 120-3 determines that the second signal S2 does not exceed the threshold value T. Based on identification, the second signal S2 can be disregarded. Even if the second signal S2 is returned to the first battery cell 120-1, since the first battery cell 120-1 is in the first state to which the identifier is assigned, the second signal S2 can be ignored. there is.
  • the third battery cell 120-3 receives a third signal S3 for allocating an identifier in the second state.
  • the third signal S3 may be a signal for allocating the identifier of the third battery cell 120 - 3 to a third numerical value different from the first numerical value and the second numerical value.
  • the third signal S3 may be transmitted from the second battery cell 120-2 to the third battery cell 120-3 through the bus bar 500.
  • the second cell controller 200 - 2 of the second battery cell 120 - 2 may be switched to a transmission mode in which a signal is transmitted in a first state in which an identifier is assigned. In the first state in which an identifier is assigned to the third battery cell 120-3, the third cell controller 200-3 of the third battery cell 120-3 may ignore the third signal S3. there is.
  • the second cell controller 200-2 of the second battery cell 120-2 may set a third numerical value by adding a designated numerical value to the second numerical value.
  • the third numerical value may be set to 3.
  • the third cell controller 200-3 of the third battery cell 120-3 may receive the third signal S3.
  • the third cell controller 200-3 of the third battery cell 120-3 may determine whether the received third signal S3 exceeds a specified threshold value T.
  • the comparator 128-3 included in the third cell controller 200-3 of the third battery cell 120-3 when the third signal S3 exceeds the threshold value T, the third signal S3, which is an analog signal, may be converted into a digital signal, and an identifier of the third battery cell 120-3 may be obtained based on a third numerical value included in the third signal S3. .
  • the second battery cell 120-2 may transmit the third signal S3 having an intensity exceeding the threshold value T to the third battery cell 120-3.
  • the third cell controller 200-3 of the third battery cell 120-3 determines that the strength of the third signal S3 exceeds the threshold T, and determines the third signal S3.
  • An identifier of the third battery cell 120 - 3 may be obtained based on the included third numerical value. When the identifier is acquired, the identifier is assigned to the third battery cell 120-3, so that the third battery cell 120-3 can be converted into a first state. In the first state, even if the third battery cell 120 - 3 receives a signal for allocating an identifier, it may ignore the signal.
  • unique identifiers may be assigned to each of the plurality of battery cells 120 .
  • the master BMS 110 may perform monitoring and/or charge/discharge control of each of the plurality of battery cells 120 .
  • the master BMS 110 may transmit a signal for controlling charging and/or discharging to an arbitrary battery cell through the bus bar 500 .
  • a battery module (eg, the battery module 100 of FIG. 6 ) according to an embodiment includes a plurality of battery cells (eg, the plurality of battery cells 120 of FIG. 6 ), a master battery management system (BMS, battery management system) ) (eg, the master BMS 110 of FIG. 6), and a bus bar (eg, the bus bar 500 of FIG. 6).
  • the plurality of battery cells include a first battery cell (eg, the first battery cell 120-1 of FIG. 6 ) and a second battery cell (eg, the second battery cell 120-2 of FIG. 6 ). can do.
  • the master BMS may be configured to manage the plurality of battery cells.
  • the bus bar may connect the plurality of battery cells and be electrically connected to the master BMS.
  • the first battery cell may include a secondary battery (eg, the secondary battery 121 of FIG. 3 ), a protection circuit (eg, the protection circuit 123 of FIG. 3 ), and a first cell controller (eg, the first cell controller of FIG. 6 ).
  • the cell controller 200-1) may be included.
  • the protection circuit may be configured to control charging and discharging of the secondary battery.
  • the first cell controller may be connected between the protection circuit and the secondary battery.
  • the first cell controller may be configured to receive a signal from the master BMS or transmit a signal to the master BMS through the bus bar.
  • the first cell controller may be configured to compare a target ID included in the signal received from the master BMS with an ID assigned to the first battery cell.
  • the first cell controller may be configured to perform an operation corresponding to the signal based on identifying that the target ID corresponds to the ID allocated to the first battery cell.
  • the first cell controller may be configured to amplify the signal and transmit the amplified signal to the second battery cell based on identifying that the target ID does not correspond to the ID allocated to the first battery cell.
  • the first cell controller may include a first stage (eg, first stage 125a of FIG. 3 ) and a second stage (eg, second stage 125b of FIG. 3 ). there is.
  • the first terminal may be connected to the positive electrode tab of the secondary battery (eg, the positive electrode tab 121a of FIG. 3 ) and the first terminal of the protection circuit (eg, the first terminal 123a of FIG. 3 ).
  • the second terminal may be connected to the negative electrode tab of the secondary battery (eg, the negative electrode tab 121b of FIG. 3 ) and the second terminal of the protection circuit (eg, the second terminal 123b of FIG. 3 ).
  • the first cell controller may, based on a potential difference between the second terminal of the first cell controller and the first terminal of the first cell controller, the first terminal received from the master BMS. It can be configured to identify signals.
  • the first cell controller may be configured to apply the amplified signal to the first terminal of the first cell controller in order to transmit the signal to the second battery cell.
  • the amplified signal applied to the first terminal of the first cell controller may be transmitted to the second battery cell through the secondary battery.
  • the signal may include information about a transmission direction of the signal and information about a target ID.
  • the first cell controller may set an identifier (ID) including a numeric value for identifying the first battery cell in the battery module. It may be configured to identify whether assigned to the first battery cell.
  • the first cell controller may be configured to receive a first signal through the bus bar in a second state different from a first state in which the identifier is assigned to the first battery cell.
  • the first cell controller may be configured to obtain the identifier of the first battery cell based on a first numerical value included in the first signal, based on receiving the first signal.
  • the first cell controller is configured to transmit, through the bus bar, a second signal for allocating an identifier of the second battery cell to the second battery cell as a second numerical value different from the first numerical value. It can be.
  • the first cell controller may be configured to determine whether the strength of the received first signal exceeds a threshold value.
  • the first cell controller may be configured to acquire the identifier of the first battery cell based on identifying that the magnitude of the first signal exceeds the threshold.
  • the threshold may be set based on the magnitude of a signal that decreases when passing through one of the plurality of battery cells.
  • the first cell controller may be configured to transmit the second signal having an intensity exceeding the threshold to the second battery cell.
  • the first cell controller may be configured to set the second numerical value by adding a specified numerical value to the first numerical value.
  • a battery module (eg, the battery module 100 of FIG. 6 ) according to an embodiment includes a plurality of battery cells (eg, the plurality of battery cells 120 of FIG. 6 ), a master battery management system (BMS, battery management system) ) (eg, the master BMS 110 of FIG. 6), and a bus bar (eg, the bus bar 500 of FIG. 6).
  • the plurality of battery cells include a first battery cell (eg, the first battery cell 120-1 of FIG. 6 ) and a second battery cell (eg, the second battery cell 120-2 of FIG. 6 ). can do.
  • the master BMS may be configured to manage the plurality of battery cells.
  • the bus bar may connect the plurality of battery cells and be electrically connected to the master BMS.
  • the first battery cell may include a secondary battery (eg, the secondary battery 121 of FIG. 3 ), a protection circuit (eg, the protection circuit 123 of FIG. 3 ), and a first cell controller (eg, the first cell controller of FIG. 6 ).
  • the cell controller 200-1) may be included.
  • the protection circuit may be configured to control charging and discharging of the secondary battery.
  • the first cell controller may be connected between the protection circuit and the secondary battery.
  • the first cell controller may be configured to receive a signal from the master BMS or transmit a signal to the master BMS through the bus bar.
  • the first cell controller allocates an identifier (ID) including a numeric value for identifying the first battery cell to the first battery cell in the battery module. It can be configured to identify whether assigned (assigned).
  • ID an identifier
  • the first cell controller may be configured to receive a first signal through the bus bar in a second state different from a first state in which the identifier is assigned to the first battery cell.
  • the first cell controller may be configured to obtain the identifier of the first battery cell based on a first numerical value included in the first signal, based on receiving the first signal.
  • the first cell controller is configured to transmit, through the bus bar, a second signal for allocating an identifier of the second battery cell to the second battery cell as a second numerical value different from the first numerical value. It can be.
  • the first cell controller may be configured to determine whether the strength of the received first signal exceeds a threshold value.
  • the first cell controller may be configured to acquire the identifier of the first battery cell based on identifying that the magnitude of the first signal exceeds the threshold.
  • the threshold may be set based on the magnitude of a signal that decreases when passing through one of the plurality of battery cells.
  • the first cell controller may be configured to transmit the second signal having an intensity exceeding the threshold to the second battery cell.
  • the first cell controller may be configured to set the second numerical value by adding a specified numerical value to the first numerical value.
  • first, second, or first or secondary may simply be used to distinguish that component from other corresponding components, and may refer to that component in other respects (eg, importance or order) is not limited.
  • a (eg, first) component is said to be “coupled” or “connected” to another (eg, second) component, with or without the terms “functionally” or “communicatively.”
  • the certain component may be connected to the other component directly (eg by wire), wirelessly, or through a third component.
  • Various embodiments of the present document may be implemented as software (eg, a program) including one or more instructions stored in a storage medium (eg, internal memory or external memory) readable by a machine.
  • the processor of the device may call at least one command among one or more commands stored from a storage medium and execute it. This enables the device to be operated to perform at least one function according to the at least one command invoked.
  • the one or more instructions may include code generated by a compiler or code executable by an interpreter.
  • the device-readable storage medium may be provided in the form of a non-transitory storage medium.
  • 'non-temporary' only means that the storage medium is a tangible device and does not contain a signal (e.g. electromagnetic wave), and this term refers to the case where data is stored semi-permanently in the storage medium. It does not discriminate when it is temporarily stored.
  • the method according to various embodiments disclosed in this document may be provided by being included in a computer program product.
  • Computer program products may be traded between sellers and buyers as commodities.
  • a computer program product is distributed in the form of a device-readable storage medium (e.g. compact disc read only memory (CD-ROM)), or through an application store (e.g. Play StoreTM) or on two user devices (e.g. It can be distributed (eg downloaded or uploaded) online, directly between smart phones.
  • a device e.g. compact disc read only memory (CD-ROM)
  • an application store e.g. Play StoreTM
  • two user devices e.g. It can be distributed (eg downloaded or uploaded) online, directly between smart phones.
  • at least part of the computer program product may be temporarily stored or temporarily created in a storage medium readable by a device such as a manufacturer's server, an application store server, or the memory 130 of a relay server. there is.
  • each component (eg, module or program) of the above-described components may include a single object or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. there is.
  • one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added.
  • a plurality of components eg modules or programs
  • the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration. .
  • the actions performed by a module, program, or other component are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the actions are executed in a different order, or omitted. or one or more other actions may be added.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Un module de batterie comprend : une pluralité d'éléments de batterie comportant un premier élément de batterie et un second élément de batterie ; un système de gestion de batterie maître (BMS) ; et une barre omnibus connectant la pluralité d'éléments de batterie les uns aux autres. Le premier élément de batterie comprend une batterie secondaire, un circuit de protection et un premier dispositif de commande d'élément configuré pour communiquer avec le BMS maître par l'intermédiaire de la barre omnibus. Le premier dispositif de commande d'élément est configuré : pour comparer un ID cible compris dans un signal reçu du BMS maître à un ID attribué au premier élément de batterie ; dans la mesure où l'ID cible est identifié comme correspondant à l'ID attribué au premier élément de batterie, pour effectuer une opération correspondant au signal ; et dans la mesure où l'ID cible est identifié comme ne correspondant pas à l'ID attribué au premier élément de batterie, pour amplifier le signal puis le transmettre au second élément de batterie.
PCT/KR2022/013119 2022-02-04 2022-09-01 Module de batterie comprenant un système de gestion de batterie WO2023149609A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
KR10-2022-0014692 2022-02-04
KR20220014683 2022-02-04
KR20220014692 2022-02-04
KR10-2022-0014683 2022-02-04
KR20220035008 2022-03-21
KR10-2022-0035006 2022-03-21
KR1020220035006A KR20230118757A (ko) 2022-02-04 2022-03-21 직렬 연결된 배터리 모듈을 포함하는 배터리 팩
KR10-2022-0035008 2022-03-21

Publications (1)

Publication Number Publication Date
WO2023149609A1 true WO2023149609A1 (fr) 2023-08-10

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110013747A (ko) * 2009-08-03 2011-02-10 삼성에스디아이 주식회사 배터리 ｉｄ 설정 시스템 및 그 구동 방법
CN102263303A (zh) * 2011-06-02 2011-11-30 福州天和新能电子科技有限公司 模块化锂动力电池及其管理系统和管理方法
KR20190089421A (ko) * 2018-01-22 2019-07-31 엘지이노텍 주식회사 배터리 관리 시스템，및 배터리 관리 시스템의 배터리모듈의 밸런싱 방법
KR20200040533A (ko) * 2018-10-10 2020-04-20 삼성전자주식회사 배터리를 관리하는 버스바, 그 제조 방법 및 이를 이용한 배터리 관리 장치
CN111478387A (zh) * 2020-04-09 2020-07-31 苏州桑倍储能技术有限公司 一种电池管理系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110013747A (ko) * 2009-08-03 2011-02-10 삼성에스디아이 주식회사 배터리 ｉｄ 설정 시스템 및 그 구동 방법
CN102263303A (zh) * 2011-06-02 2011-11-30 福州天和新能电子科技有限公司 模块化锂动力电池及其管理系统和管理方法
KR20190089421A (ko) * 2018-01-22 2019-07-31 엘지이노텍 주식회사 배터리 관리 시스템，및 배터리 관리 시스템의 배터리모듈의 밸런싱 방법
KR20200040533A (ko) * 2018-10-10 2020-04-20 삼성전자주식회사 배터리를 관리하는 버스바, 그 제조 방법 및 이를 이용한 배터리 관리 장치
CN111478387A (zh) * 2020-04-09 2020-07-31 苏州桑倍储能技术有限公司 一种电池管理系统

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