Battery management device and operation method thereof

Abstract

A battery diagnostic device according to an embodiment disclosed in the present document may comprise: a first communication unit which broadcasts a wide-area signal for communication with a plurality of slave BMSs to the plurality of slave BMSs; a second communication unit which transmits a direct signal for direct communication with a specific slave BMS among the plurality of slave BMSs to the specific slave BMS; and a controller which controls operations of the first communication unit and the second communication unit.

Description

Battery management device and method of operation thereof

[0001] Cross-citation with related applications

[0002] This invention claims the benefit of priority to Korean Patent Application No. 10-2023-0160245, filed November 20, 2023, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] Embodiments disclosed in this document relate to a battery management device and an operating method thereof.

[0005] Recently, active research and development has been conducted on secondary batteries. The term "secondary battery" refers to a rechargeable battery, encompassing both conventional Ni / Cd and Ni / MH batteries, as well as more recent lithium-ion batteries. Among secondary batteries, lithium-ion batteries boast a significantly higher energy density than conventional Ni / Cd and Ni / MH batteries. Furthermore, lithium-ion batteries can be manufactured in a compact and lightweight form, making them a popular power source for mobile devices. Recently, their use has expanded to include power sources for electric vehicles, drawing attention as a next-generation energy storage medium.

[0006] As the industrial sector utilizing batteries expands, battery management systems (BMSs), which diagnose battery safety, are also evolving. BMSs utilize a variety of diagnostic algorithms to assess battery performance and implement appropriate control based on battery condition.

[0007] A BMS may include a master BMS and slave BMSs. The slave BMS can manage battery modules within a battery pack using status information about the battery modules. The master BMS receives status information about the battery modules from the slave BMSs and can monitor the status of the battery modules and battery cells within the battery pack by measuring the voltage, current, and resistance values ​​of each battery pack unit.

[0008] A BMS may include multiple sensors to measure the condition of the battery, and the battery condition values ​​measured by the sensors may be transmitted to the master BMS via the slave BMS. For transmission, the sensors, slave BMS, and / or master BMS are typically connected by wires. However, as the number of battery cells or sensors increases, the number of required wires increases, which presents a problem.

[0009] Fig. 1 illustrates a communication method within a typical wireless BMS. Referring to Fig. 1, in order to solve the above problem, a battery can be managed with a simplified structure by exchanging data through optical communication without a separate wire between an upper BMS (10) and lower BMSs (12, 14, 16). Here, the upper BMS (10) may be a master BMS, and each of the lower BMSs (12, 14, 16) may be a slave BMS. For example, the upper BMS (10) may transmit a signal through a light-emitting diode (101) that transmits an optical signal, and the first lower BMS (12) may receive the signal through a receiver (111). Communication between the first lower BMS (12) and the second lower BMS (14) and data communication between the second lower BMS (14) and the third lower BMS (16) may also be the same as the communication method between the upper BMS (10) and the first lower BMS (12).

[0010] However, the optical communication between the upper BMS (10) and the lower BMSs (12, 14, 16) is in a daisy chain manner, where the upper BMS (10) issues a command to the first lower BMS (12), and the remaining lower BMSs (14, 16) sequentially receive the command through the first lower BMS (12). In this case, there is a problem that there is a difference in the time at which the command is issued to each lower BMS (12, 14, 16).

[0011] The technical problems of the embodiments disclosed in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the descriptions below.

[0012] A battery management device according to an embodiment disclosed in this document may include a first communication unit that broadcasts a wide-area signal for communication with a plurality of slave BMSs to the plurality of slave BMSs; a second communication unit that transmits a direct signal for direct communication with a specific slave BMS among the plurality of slave BMSs to the specific slave BMS; and a controller that controls operations of the first communication unit and the second communication unit.

[0013] In one embodiment, the first communication unit may further include a focusing mirror that reflects the wide-area signal and focuses it on a specific point.

[0014] In one embodiment, the first communication unit may include a first light-emitting diode for transmitting the wide-area signal, and the second communication unit may include a second light-emitting diode for transmitting the direct signal.

[0015] In one embodiment, the first communication unit may further include a first switch for supplying current to the first light-emitting diode, the second communication unit may further include a second switch for supplying current to the second light-emitting diode, and the controller may control the operation of at least one of the first switch and the second switch.

[0016] In one embodiment, the second communication unit may include a receiver that receives diagnostic data about the battery generated by at least one of the plurality of slave BMSs based on the wide-area signal or the direct signal.

[0017] In one embodiment, the diagnostic data may include at least one of voltage, current, and temperature values ​​of the battery.

[0018] In one embodiment, the wide area signal may include a block signal that blocks daisy chain communication between the plurality of slave BMSs.

[0019] A method of operating a battery management device according to an embodiment disclosed in this document may include an operation of broadcasting a wide-area signal for communication with a plurality of slave BMSs to the plurality of slave BMSs; and an operation of reflecting the wide-area signal and simultaneously transmitting it to a receiver of each of the plurality of slave BMSs.

[0020] In one embodiment, the wide area signal may include a block signal that blocks daisy chain communication between the plurality of slave BMSs.

[0021] In one embodiment, the method of operating the battery diagnostic device may further include receiving diagnostic data regarding a battery generated by at least one of the plurality of slave BMSs based on the wide-area signal.

[0022] In one embodiment, the diagnostic data may include at least one of voltage, current, and temperature values ​​of the battery.

[0023] The battery management device and its operating method according to various embodiments disclosed in this document can simultaneously transmit signals to multiple slave BMSs using wideband light-emitting diodes. Accordingly, time delays resulting from signal transmission via daisy chain communication can be prevented.

[0024] The effects of the battery management device and the operating method thereof according to the disclosure of this document are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art according to the disclosure of this document.

[0025] Figure 1 illustrates the communication method within a typical wireless BMS.

[0026] FIG. 2 is a block diagram of a battery management device according to an embodiment disclosed in this document.

[0027] FIG. 3A illustrates a battery rack including a battery management device according to one embodiment disclosed in the present document.

[0028] FIG. 3b illustrates the configuration of a first communication unit according to an embodiment disclosed in this document.

[0029] FIG. 4 is a diagram showing a process in which a controller according to one embodiment disclosed in this document controls the operation of a switch according to a wide-area signal or a direct signal.

[0030] FIG. 5 is a flowchart illustrating an operation method of a battery management device according to an embodiment disclosed in this document.

[0031] FIG. 6 is a block diagram showing the hardware configuration of a computing system that implements an operating method of a battery management device according to an embodiment disclosed in this document.

[0032] In connection with the description of the drawings, the same or similar reference numerals may be used for identical or similar components.

[0033] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that the present invention encompasses various modifications, equivalents, and / or alternatives of the embodiments.

[0034] The embodiments and terminology used in this document are not intended to limit the technical features described in this document to a specific embodiment, but should be understood to encompass various modifications, equivalents, or alternatives of the embodiment. In connection with the description of the drawings, similar reference numerals may be used to refer to similar or related components. The singular form of a noun corresponding to an item may include one or more of the item, unless the relevant context clearly indicates otherwise.

[0035] In this document, the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can each include any one of the items listed together in that phrase, or all possible combinations thereof. Terms such as "first", "second", "first", "second", "A", "B", "(a)", or "(b)" may be used merely to distinguish the corresponding component from other corresponding components, and do not limit the corresponding components in any other respect (e.g., importance or order) unless specifically stated otherwise.

[0036] In this document, when a component (e.g., a first component) is referred to as being “connected,” “coupled,” or “connected,” with or without the terms “functionally” or “communicatively,” or “coupled” or “connected,” it means that the component can be connected to the other component directly (e.g., wired or wirelessly), or indirectly (e.g., via a third component).

[0037] The methods according to various embodiments disclosed in this document may be provided as included in a computer program product. The computer program product may be traded as a commodity between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory, CD-ROM), or may be distributed online (e.g., downloaded or uploaded) through an application store or directly between two user devices. In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0038] According to the embodiments disclosed in this document, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to the embodiments disclosed in this document, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to the embodiments disclosed in this document, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0039] FIG. 2 illustrates a battery rack including a battery diagnostic device according to one embodiment disclosed in the present document.

[0040] Referring to FIG. 2, the battery management device (20) can exchange data with a plurality of slave BMSs (22, 24, 26) through wide-area communication or direct communication. The battery management device (20) can solve the time delay problem caused by the daisy chain communication method by simultaneously transmitting a diagnostic command for battery diagnosis to a plurality of slave BMSs (22, 24, 26) through wide-area communication.

[0041] According to an embodiment, the battery management device (20) may be a master BMS. Here, the master BMS may obtain status information generated by each of the slave BMSs and monitor the status of each battery cell. Here, the status information may include at least one of voltage, current, resistance, state of charge (SOC), state of health (SOH), and temperature of the battery pack, battery module, or each of the battery cells.

[0042] In one embodiment, the battery management device (20) may be included in the master BMS, and operations performed in the battery diagnostic device (20) may be performed in the master BMS. In addition, operations performed in the battery diagnostic device (20) may be performed by the master BMS, as well as by various devices such as a server, a cloud charger, or a charger / discharger.

[0043] Each of the plurality of slave BMSs (22, 24, 26) can measure the status of each of the corresponding battery units (220, 240, 260). Here, each of the battery units (220, 240, 260) may refer to a set including one or more battery cells. For example, each of the battery units (220, 240, 260) may include one or more battery modules or one or more battery cells. Although FIG. 2 illustrates three slave BMSs, the number of slave BMSs is not limited thereto.

[0044] Each of the plurality of slave BMSs (22, 24, 26) can generate diagnostic data for each of the battery units (220, 240, 260). Here, the diagnostic data can include at least one of voltage, current, and temperature values ​​of each of the battery cells included in each of the battery units (220, 240, 260). For example, the first slave BMS (22) can generate diagnostic data that diagnoses the status of the battery cells (221, 222) included in the first battery unit (220). According to an embodiment, the battery cells (221, 222) can be, but are not limited to, a lithium-ion (Li-ion) battery, a lithium-ion polymer (Li-ion polymer) battery, a nickel-cadmium (Ni-Cd) battery, a nickel-metal hydride (Ni-MH) battery, a lithium iron phosphate (LFP) battery, a nickel-cobalt manganese (NCM) battery, etc. In FIG. 2, only the battery cells (221, 222) included in the first battery unit (220) are described, but this is only for convenience of explanation, and the second battery unit (240) and the third battery unit (260) may also include a plurality of battery cells.

[0045] In one embodiment, a plurality of slave BMSs (22, 24, 26) may be connected in a daisy chain manner. Here, the daisy chain manner may include a method of connecting a plurality of devices in series in a bus wiring manner. For example, a first slave BMS (22) may be connected to a second slave BMS (24), and the second slave BMS (24) may be connected to a third slave BMS (26). Third diagnostic data generated in the third slave BMS (26) may be transmitted to the first slave BMS (22) via the second slave BMS (24), and the first slave BMS (22) may transmit the third diagnostic data to the battery management device (20).

[0046] In one embodiment, the daisy chain connection between the plurality of slave BMSs (22, 24, 26) may be a wired or wireless connection, and in the case of a wireless connection, data may be exchanged between the plurality of slave BMSs (22, 24, 26) via optical communication.

[0047] Below, wide-area communication and direct communication between the battery management device (20) and slave BMSs (22, 24, 26) are described.

[0048] The battery management device (20) may include a first communication unit (200), a second communication unit (202), and a controller (204).

[0049] The first communication unit (200) can broadcast a wide-area signal to a plurality of slave BMSs (22, 24, 26). The first communication unit (200) can broadcast a wide-area signal to a plurality of slave BMSs (22, 24, 26) through wide-area communication.

[0050] Wide-area communication may refer to communication according to a one-to-many communication method between a first communication unit (200) and a plurality of slave BMSs (22, 24, 26). The wide-area signal may be a signal that commands the plurality of slave BMSs (22, 24, 26) to simultaneously measure the status of each of the corresponding battery units (220, 240, 260). The first communication unit (200) broadcasts the wide-area signal to the plurality of slave BMSs (22, 24, 26), so that the plurality of slave BMSs (22, 24, 26) can simultaneously receive the wide-area signal. Accordingly, a time delay caused by signal transmission according to a daisy chain communication method between slave BMSs can be prevented.

[0051] In one embodiment, the wide-area signal may include a block signal. Here, the block signal may be a signal that blocks daisy-chain communication between slave BMSs (22, 24, 26). By including the block signal in the wide-area signal, wide-area signal transmission between multiple slave BMSs (22, 24, 26) is blocked, thereby preventing redundant transmission of the wide-area signal. For example, when the first slave BMS (22) receives a wide-area signal including a block signal, it may not transmit the wide-area signal to the second slave BMS (24), thereby preventing the second slave BMS (24) from receiving the wide-area signal redundantly.

[0052] The second communication unit (202) can transmit a direct signal to a specific slave BMS among a plurality of slave BMSs (22, 24, 26). The second communication unit (202) can transmit a direct signal to a specific slave BMS among a plurality of slave BMSs (22, 24, 26) through direct communication. Here, the specific slave BMS may refer to a slave BMS connected to the battery management device (20) in a daisy chain manner, and the following description will assume that the specific slave BMS is the first slave BMS (22).

[0053] Direct communication may be a one-to-one communication method between the second communication unit (202) and the first slave BMS (22) in a daisy chain manner, and may be the same as the communication method between the upper BMS (10, see FIG. 1) and the first lower BMS (12, see FIG. 1) in FIG. 1.

[0054] In one embodiment, the second communication unit (202) may further include a receiver (not shown). The receiver may receive diagnostic data regarding the battery generated by at least one of the plurality of slave BMSs (22, 24, 26) based on a wide-area signal or a direct signal. The method by which the receiver receives the diagnostic data may be the same as the communication method between the upper BMS (10, see FIG. 1) and the first lower BMS (12, see FIG. 1) of FIG. 1, which is a daisy chain communication method. For example, when each of the plurality of slave BMSs (22, 24, 26) generates diagnostic data based on a wide-area signal, the first slave BMS (22) may receive the diagnostic data generated by the other slave BMSs (22, 24, 26) through the daisy chain communication method and transmit the same to the receiver.

[0055] Here, the reason why the receiver receives the diagnostic data generated based on the wide-area signal through the daisy-chain communication method is to minimize power consumption. Based on the content described below, a wide-area light emitting diode may be required to broadcast the wide-area signal. Since the wide-area light emitting diode has a wider transmission range and a stronger transmission signal than the light emitting diode that performs the daisy-chain communication method, the power consumption may be greater. Accordingly, the battery management device (20) can minimize power consumption by simultaneously transmitting the wide-area signal to a plurality of slave BMSs (22, 24, 26) and then receiving the generated diagnostic data through the daisy-chain communication method.

[0056] The controller (204) can control the operations of the first communication unit (200) and the second communication unit (202). In one embodiment, the controller (204) can generate a wide-area signal and / or a direct signal, and control the operations of the first communication unit (200) and / or the second communication unit (202) based on the type of the generated signal. For example, the controller (204) can control the first communication unit (200) to perform an operation to generate a wide-area signal and transmit the generated wide-area signal. The controller (204) can control the second communication unit (202) to perform an operation to generate a direct signal and transmit the generated direct signal.

[0057] Below, the broadcasting of a wide area signal is described through FIGS. 3a and 3b.

[0058] FIG. 3A illustrates a battery rack including a battery management device according to one embodiment disclosed in the present document.

[0059] Referring to FIG. 3a, the battery management device (20) illustrates the structure of a battery rack (30) for broadcasting a wide area signal.

[0060] The battery rack (30) may include a battery management device (20), trays (32) including a plurality of battery cells, and a carrier (34) protecting the aforementioned configurations. Here, each of the trays (32) may include slave BMSs (22, 24, 26) and battery units (220, 240, 260). In the battery rack (30), the battery management device (20) and the trays (32) may be arranged in a vertical structure. The carrier (34) may have a hexahedral structure, and a portion of the carrier (34) may be a door (36) for inserting or removing the battery management device (20) and the trays (32). Here, the battery management device (20) may be a master BMS, and the battery management device (20) may transmit a wide-area signal to the slave BMSs included in each of the trays (32).

[0061] The first communication unit (200) of the battery management device (20) can transmit a wide-area signal to the slave BMS included in each of the trays (32). The wide-area signal can be transmitted to the slave BMS of each of the trays (32) through the first light-emitting diode (300) of the first communication unit (200). Here, the wide-area signal may be an infrared ray transmitted from the first light-emitting diode (300). In FIG. 3A, the wide-area signal is explained assuming that it is an infrared ray.

[0062] In one embodiment, the structure of the battery rack (30) may include a configuration that facilitates infrared reflection. For example, the door (36) of the battery rack (30) may include a configuration that facilitates reflection. The inner surface of the door (36) may be painted with a paint that facilitates infrared reflection, and the infrared reflectivity may be increased by the paint. The paint painted on the inner surface of the door (36) may be a paint that can reflect only about 50% to 100% of infrared rays. By increasing the reflectivity for a wide-area signal through the paint, the transmission of the wide-area signal may be facilitated. In FIG. 3A, for the convenience of explanation, the paint is described as being painted only on the inner surface of the door (36), but the present invention is not limited thereto, and the paint that facilitates infrared reflection may be painted on the inner surface of all or part of the carrier (34).

[0063] FIG. 3b illustrates the configuration of a first communication unit according to an embodiment disclosed in this document.

[0064] Referring to FIG. 3b, the first communication unit (200) and / or each of the plurality of slave BMSs (22, 24, 26) may include a configuration for broadcasting a wide area signal.

[0065] The first communication unit (200) may include a first light-emitting diode (300). The first light-emitting diode (300) may be a wideband light-emitting diode. Here, the wideband light-emitting diode is configured with a lens that expands the transmission range, and can transmit a wide-area signal at a 360-degree angle. By selecting a wideband light-emitting diode as the first light-emitting diode (300), the transmission range and transmission intensity of the wide-area signal can be improved.

[0066] In one embodiment, the first communication unit (200) may further include a transmission focusing mirror (310). The mirror surface of the transmission focusing mirror (310) may have a semi-elliptical arch structure. The first light-emitting diode (300) may be positioned at a first focus of the transmission focusing mirror (310). By positioning the first light-emitting diode (300) at the first focus of the semi-elliptical arch structure, infrared rays emitted by the first light-emitting diode (300) may be reflected by the transmission focusing mirror (310) and focused at a second focus (312). Accordingly, by reflecting infrared rays by the transmission focusing mirror (310), the direction of transmission of infrared rays may be changed toward the receivers (320, 340, 360). Here, the first receiver (320) may be included in the first slave BMS (22), and the second receiver (340) and the third receiver (360) may be included in the second slave BMS (24) and the third slave BMS (26), respectively.

[0067] Each of the plurality of slave BMSs (22, 24, 26) may include a receiver for receiving a wide-area signal. In one embodiment, the receivers (320, 340, 360) may more easily receive a wide-area signal by using the receiving condenser mirrors (314, 316) corresponding to the transmitting condenser mirror (310). In order for the infrared rays condensed at the second focus (312) to reach the reception range of the receivers (320, 340, 360), the receiving condenser mirrors (314, 316) may be positioned in positions that take into account the positions and reception ranges of the second focus (312) and the receivers (320, 340, 360). Additionally, the aforementioned transmission focusing mirror (310) and reception focusing mirrors (314, 316) can be arranged so as not to interfere with the path of wide-area communication and / or direct communication.

[0068] For convenience of explanation, in FIG. 3b, a wide area signal is transmitted to receivers (320, 340, 360) through one focusing set including a first receiving focusing mirror (314) and a second receiving focusing mirror (316), but this is not limited thereto, and a plurality of focusing sets may be included, and each of the plurality of focusing sets may be arranged to correspond to the reception range of each of the receivers (320, 340, 360).

[0069] FIG. 4 is a diagram showing a process in which a controller according to one embodiment disclosed in this document controls the operation of a switch according to a wide-area signal or a direct signal.

[0070] Referring to FIG. 4, the first communication unit (200) may include a first light-emitting diode (300) and a first switch (302). The second communication unit (202) may include a second light-emitting diode (400) and a second switch (402). Here, when the first switch (302) is turned on, a wide-area signal may be transmitted, and when the second switch (402) is turned on, a direct signal may be transmitted through a daisy chain communication method.

[0071] The controller (204) can control the operations of the first switch (302) and the second switch (402). For example, when a wide-area signal is generated by the upper processor, the controller (204) can control the first switch (302) to be turned on and the second switch (402) to be turned off.

[0072] FIG. 5 is a flowchart illustrating an operation method of a battery management device according to an embodiment disclosed in this document.

[0073] Referring to FIG. 5, in operation 500, the battery management device (20) can generate a wide-area signal or a direct signal.

[0074] In operation 502, the battery management device (20) can transmit the generated signal to at least one slave BMS. The battery management device (20) can broadcast a wide-area signal to a plurality of slave BMSs (22, 24, 26). The battery management device (20) can transmit a direct signal to the first slave BMS (22).

[0075] In operation 504, at least one slave BMS can measure the state of the battery unit based on the generated signal. Each of the plurality of slave BMSs (22, 24, 26) can simultaneously measure the state of the battery unit corresponding to each slave BMS based on the wide-area signal. The first slave BMS (22) can measure the state of the first battery unit (220) based on the direct signal. In one embodiment, the first slave BMS (22) can transmit the direct signal to the second slave BMS (24) through a daisy chain communication method, and the second slave BMS (24) can transmit the direct signal to the third slave BMS (26) through a daisy chain communication method.

[0076] In one embodiment, the controller (204) of the battery management device (20) can control the operations of the first communication unit (200) and the second communication unit (202) based on a wide-area signal or a direct signal. The controller (204) can control the operation of the first switch (302) of the first communication unit (200) to be switched on based on the wide-area signal. The controller (204) can control the operation of the second switch (402) of the second communication unit (202) to be switched on based on the direct signal.

[0077] FIG. 6 is a block diagram showing the hardware configuration of a computing system that implements an operating method of a battery management device according to an embodiment disclosed in this document.

[0078] Referring to FIG. 6, a computing system (60) according to one embodiment disclosed in this document may include an MCU (600), a memory (610), an input / output I / F (620), and a communication I / F (630).

[0079] The MCU (600) may be a processor that executes various programs (e.g., a battery diagnostic program) stored in the memory (610), processes various data from these programs, and performs the functions of the battery management device (20) shown in the aforementioned FIGS. 2 to 4.

[0080] The memory (610) can store various programs related to the operation of the battery management device (20). In addition, the memory (610) can store operation data of the battery management device (20).

[0081] Such memories (610) may be provided in multiples as needed. The memories (610) may be volatile memories or non-volatile memories. As volatile memories (610), RAM, DRAM, SRAM, etc. may be used. As non-volatile memories (610), ROM, PROM, EAROM, EPROM, EEPROM, flash memories, etc. may be used. The examples of the memories (610) listed above are merely examples and are not limited to these examples.

[0082] The input / output I / F (620) can provide an interface that enables data transmission and reception between an input device (not shown) such as a keyboard, mouse, or touch panel, and an output device (not shown) such as a display and the MCU (600).

[0083] The communication I / F (630) is a component capable of transmitting and receiving various data with the server, and may be any device capable of supporting wired or wireless communication. For example, programs for resistance measurement and abnormality diagnosis, as well as various data, can be transmitted and received from a separately provided external server via the communication I / F (630).

[0084] The terms "include," "comprise," or "have" used herein, unless otherwise specifically stated, imply that the corresponding component may be included, and therefore should be interpreted to include other components rather than to exclude other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments disclosed in this document pertain, unless otherwise defined. Commonly used terms, such as terms defined in dictionaries, should be interpreted to be consistent with their contextual meaning in the relevant art, and shall not be interpreted in an idealized or overly formal sense, unless explicitly defined in this document.

[0085] The above description is merely an example of the technical idea disclosed in this document, and those skilled in the art to which the embodiments disclosed in this document pertain may make various modifications and variations without departing from the essential characteristics of the embodiments disclosed in this document. Therefore, the embodiments disclosed in this document are not intended to limit the technical idea of ​​the embodiments disclosed in this document, but to explain it, and the scope of the technical idea disclosed in this document is not limited by these embodiments. The scope of protection of the technical idea disclosed in this document should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of rights of this document.

Claims

1. A first communication unit for broadcasting a wide-area signal for communication with a plurality of slave BMSs to the plurality of slave BMSs; A second communication unit that transmits a direct signal for direct communication with a specific slave BMS among the plurality of slave BMSs to the specific slave BMS; and Including a controller that controls the operation of the first communication unit and the second communication unit, Battery management device.

2. In claim 1, The above first communication unit, Further comprising a focusing mirror that reflects the wide-area signal and focuses it on a specific point. Battery management device.

3. In claim 1, The above first communication unit, Including a first light emitting diode for transmitting the above wide area signal, The above second communication unit, comprising a second light emitting diode for transmitting the above direct signal; Battery management device.

4. In claim 3, The above first communication unit, Further comprising a first switch for supplying current to the first light-emitting diode; The above second communication unit, Further comprising a second switch for supplying current to the second light-emitting diode; The above controller, Controlling the operation of at least one of the first switch and the second switch, Battery management device.

5. In claim 1, The above second communication unit, A receiver comprising: a battery diagnostic data generated by at least one of the plurality of slave BMSs based on the wide-area signal or the direct signal; Battery management device.

6. In claim 5, The above diagnostic data includes at least one of voltage, current, and temperature values ​​of the battery. Battery management device.

7. In claim 1, The above wide area signal includes a block signal that blocks daisy chain communication between the plurality of slave BMSs. Battery management device.

8. An operation of broadcasting a wide area signal for communication with a plurality of slave BMSs to the plurality of slave BMSs; and Including an operation of reflecting the above wide-area signal and simultaneously transmitting it to the receiver of each of the plurality of slave BMSs. Method of operation of a battery management device.

9. In claim 8, The above wide area signal includes a block signal that blocks daisy chain communication between the plurality of slave BMSs. Method of operation of a battery management device.

10. In claim 8, Further comprising an operation of receiving diagnostic data about a battery generated by at least one of the plurality of slave BMSs based on the wide-area signal. Method of operation of a battery management device.

11. In claim 10, The above diagnostic data includes at least one of voltage, current, and temperature values ​​of the battery. Method of operation of a battery management device.

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