Battery state management device and method thereof

Abstract

A battery state management device according to an embodiment of the present document may comprise: a first sensor that is constantly supplied with power through a first power supply circuit and detects a state of a battery unit; a switch that electrically connects a second power supply circuit, which supplies power to a second sensor different from the first sensor, to the first power supply circuit; and a power control circuit that controls an operation of the switch in response to an abnormal signal corresponding to a detection result from the first sensor.

Description

Battery status management device and method thereof

[0001] Cross-citation with related applications

[0002] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2024-0082024, filed June 24, 2024, the entire contents of which are incorporated herein by reference.

[0003] Technology field

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

[0005] Recently, research and development on secondary batteries has been actively underway. Here, secondary batteries are defined as rechargeable and dischargeable batteries, encompassing both conventional Ni / Cd and Ni / MH batteries, as well as more recent lithium-ion batteries. Recently, their use has expanded to include power sources for electric vehicles, attracting attention as a next-generation energy storage medium.

[0006] With the Fourth Industrial Revolution driving demand for high-capacity, high-power batteries across various industries, the importance of technology for monitoring battery unit abnormalities is increasing. Detecting battery unit abnormalities through monitoring is essential not only for ensuring battery stability but also for securing user trust. Accordingly, efforts are being made to improve monitoring accuracy. However, excessive allocation of time and electrical resources to abnormality monitoring can lead to reduced battery output and performance degradation. Therefore, technology development is underway to monitor abnormalities within limited time and electrical resources.

[0007] According to embodiments disclosed in this document, it is an object to provide a battery state management device and method for monitoring the state of a battery unit in a low power mode.

[0008] According to embodiments disclosed in this document, it is intended to provide a battery state management device and method that are activated when an abnormality is detected in a low power mode.

[0009] According to embodiments disclosed in this document, it is an object to provide a battery state management device and method for activating a central control device external to the battery state management device when activated in a low power mode.

[0010] According to embodiments disclosed in this document, it is an object to provide a battery status management device and method that reduces resources consumed in monitoring the status of a battery unit.

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

[0012] A battery status management device according to one embodiment of the present document may include a first sensor that is constantly supplied with power through a first power supply circuit and detects a status of a battery unit, a switch that electrically connects a second power supply circuit that supplies power to a second sensor different from the first sensor to the first power supply circuit, and a power control circuit that controls the operation of the switch in response to an abnormal signal corresponding to a detection result of the first sensor.

[0013] In one embodiment, the power control circuit can control the operation of the switch by providing a voltage to the switch in response to obtaining the abnormal signal or obtaining an alarm signal from a central control device external to the battery condition management device.

[0014] In one embodiment, the switch is electrically connected to the power control circuit, and based on obtaining voltage from the power supply circuit, the second power supply circuit can be electrically connected to the first power supply circuit to supply power to the second sensor.

[0015] According to one embodiment, the first power supply circuit may include at least one of an inductor-capacitor (LC) filter, a capacitor-inductor-capacitor (CLC) filter, or any combination thereof, and a first low dropout (LDO) that provides power to the first sensor in an amount equal to a rated voltage of the first sensor. The second power supply circuit may include a second LDO that provides power to the second sensor in an amount equal to a rated voltage of the second sensor.

[0016] According to one embodiment, the battery state management device further includes an activation circuit that transmits a signal for activating a central control device external to the battery state management device to the central control device based on the electrical connection of the first power supply circuit and the second power supply circuit, wherein one terminal of the activation circuit is configured to be electrically connected to the central control device, and the other terminal of the activation circuit can be electrically connected to the second power supply circuit.

[0017] According to one embodiment, the battery status management device further includes a microcontroller unit (MCU) having a first terminal electrically connected to the first sensor, a second terminal of the MCU electrically connected to the second sensor, a third terminal of the MCU electrically connected to the second power supply circuit, and a fourth terminal of the MCU electrically connected to the power control circuit.

[0018] According to one embodiment, the battery condition management device further includes a CAN (controller area network) transceiver having one terminal electrically connected to the second power supply circuit, and the other terminal of the CAN transceiver can be electrically connected to the MCU.

[0019] According to one embodiment, the first sensor may be powered through the first power supply circuit in a low power mode according to power below a reference value, and the second sensor may be powered in the low power mode according to whether the first power supply circuit and the second power supply circuit are electrically connected.

[0020] A battery status management method according to another embodiment of the present document may include an operation of constantly supplying power through a first power supply circuit by a first sensor and detecting a status of a battery unit, an operation of controlling an operation of a switch in response to an abnormal signal corresponding to a detection result of the first sensor by a power control circuit, and an operation of electrically connecting a second power supply circuit that supplies power to a second sensor different from the first sensor to the first power supply circuit by the switch.

[0021] According to one embodiment, the battery state management method may further include controlling the operation of the switch by providing voltage to the switch in response to obtaining an alarm signal from a central control device external to the battery state management device by the power control circuit.

[0022] In one embodiment, the act of electrically connecting the second power supply circuit, which supplies power to the second sensor different from the first sensor, with the first power supply circuit by the switch may include the act of electrically connecting the second power supply circuit with the first power supply circuit to supply power to the second sensor based on the switch being electrically connected to the power control circuit and obtaining voltage from the power supply circuit by the switch.

[0023] According to one embodiment, the first power supply circuit may include at least one of an inductor-capacitor (LC) filter, a capacitor-inductor-capacitor (CLC) filter, or any combination thereof, and a first low dropout (LDO) that provides power to the first sensor in an amount equal to a rated voltage of the first sensor, and the second power supply circuit may include a second LDO that provides power to the second sensor in an amount equal to a rated voltage of the second sensor.

[0024] According to one embodiment, the battery state management method further includes an operation of transmitting a signal for activating a central control device external to the battery state management device to the central control device based on the electrical connection of the first power supply circuit and the second power supply circuit by an activation circuit, wherein one terminal of the activation circuit may be electrically connected to the central control device and the other terminal of the activation circuit may be electrically connected to the second power supply circuit.

[0025] According to one embodiment, the battery status management method may further include an operation of transmitting, by a micro controller unit (MCU), at least one of a measurement value of the first sensor, a measurement value of the second sensor, or a combination thereof to a controller area network (CAN) transceiver. A first terminal of the MCU may be electrically connected to the first sensor, a second terminal of the MCU may be electrically connected to the second sensor, a third terminal of the MCU may be electrically connected to the second power supply circuit, and a fourth terminal of the MCU may be electrically connected to the power control circuit.

[0026] According to one embodiment, the battery state management method further includes an operation of identifying, by the CAN transceiver, at least one of a measurement value of the first sensor, a measurement value of the second sensor, or a combination thereof, wherein one terminal of the CAN transceiver is electrically connected to the second power supply circuit, and the other terminal of the CAN transceiver is electrically connected to the MCU.

[0027] According to one embodiment, the first sensor may be powered through the first power supply circuit in a low power mode according to power below a reference value, and the second sensor may be powered in the low power mode according to whether the first power supply circuit and the second power supply circuit are electrically connected.

[0028] This technology can monitor the status of a battery unit in low power mode.

[0029] Additionally, the present technology can activate the battery health management device when an abnormality is detected in low power mode.

[0030] Additionally, the present technology may enable a central control unit external to the battery health management device when activated in low power mode.

[0031] Additionally, the present technology can reduce the resources consumed in monitoring the status of a battery unit.

[0032] In addition, various effects may be provided, either directly or indirectly, through this document.

[0033] FIG. 1 is a block diagram showing a battery pack in a battery state management device and a battery state management method according to one embodiment of the present document.

[0034] FIG. 2 is a block diagram showing the configuration of a battery status management device according to one embodiment of the present document.

[0035] FIG. 3 is a block diagram showing a battery state management device and a battery state management method according to one embodiment of the present document.

[0036] FIG. 4 is a circuit diagram showing a switch and a power control circuit in a battery state management device and a battery state management method according to one embodiment of the present document.

[0037] FIG. 5 is a circuit diagram showing an activation circuit in a battery state management device and a battery state management method according to one embodiment of the present document.

[0038] FIG. 6 illustrates the flow of operations of a battery state management device that operates an abnormality detection module in a battery state management device and a battery state management method according to one embodiment of the present document.

[0039] FIG. 7 illustrates a flow of operations of a battery state management device electrically connecting a second power supply circuit to a first power supply circuit in a battery state management device and a battery state management method according to one embodiment of the present document.

[0040] FIG. 8 is a block diagram showing the hardware configuration of a computing system that performs a battery state management method in a battery state management device and a battery state management method according to one embodiment of the present document.

[0041] Hereinafter, some embodiments disclosed in this document are described with reference to the accompanying drawings, which illustrate various embodiments of this document. However, this is not intended to limit the present technology to specific embodiments, and it should be understood that various modifications, equivalents, and / or alternatives of the embodiments of this technology are included.

[0042] When assigning reference numerals to components in each drawing, it should be noted that identical components are assigned the same numerals whenever possible, even if they are shown in different drawings. Furthermore, when describing various embodiments disclosed in this document, if a detailed description of a related known configuration or function is deemed to hinder understanding of the embodiments of the present invention, the detailed description will be omitted. The singular form of a noun corresponding to an item may include one or more items, unless the context clearly indicates otherwise.

[0043] In describing the components of the embodiments of this document, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components may not be limited by the terms. In addition, unless otherwise defined, all terms used herein, 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 belong. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined in this application.

[0044] In addition, in the present disclosure, expressions such as "more than" or "less than" may be used to determine whether a specific condition is satisfied or fulfilled. However, this is merely a description for expressing an example and does not exclude descriptions such as "more than" or "less than." Conditions described as "more than" may be replaced with "more than," conditions described as "less than," and conditions described as "more than and less than" may be replaced with "more than and less than." In addition, hereinafter, "A" to "B" mean at least one of the elements from A (including A) to B (including B).

[0045] In this document, each of 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" may include any one of the items listed together in that phrase, or all possible combinations thereof.

[0046] 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 is referred to as being “coupled” or “connected,” it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0047] According to one embodiment, the method according to the various embodiments disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product 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.

[0048] According to various embodiments, each component (e.g., a module or a program) of the described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, 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 such a 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 integration. According to various embodiments, 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.

[0049] Hereinafter, embodiments of the present document will be described in detail with reference to FIGS. 1 to 8.

[0050] FIG. 1 is a block diagram showing a battery pack in a battery state management device and a battery state management method according to one embodiment of the present document.

[0051] Referring to FIG. 1, a battery pack (1) may include a battery unit (12), a sensor unit (14), a switching unit (16), and a battery management system (BMS) (20). At this time, the battery pack (1) may be equipped with a plurality of battery units (12), sensor units (14), switching units (16), and battery management systems (20).

[0052] According to one embodiment, the battery unit (12) can supply power to a target device (not shown). To this end, the battery unit (12) can be electrically connected to the target device. Here, the target device can include an electrical, electronic, or mechanical device that operates by receiving power from the battery pack (1). For example, the target device can be, but is not limited to, an electric vehicle (EV).

[0053] According to one embodiment, the battery unit (12) may include at least one battery cell (10) that can be charged and discharged. Here, the battery cell (10) may be a basic unit of a battery cell that can charge and discharge electric energy and use it. For example, the battery cell (10) may be 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, etc., but may not be limited thereto.

[0054] According to one embodiment, a plurality of battery units (12) may be connected in series or parallel. For example, the battery unit (12) may be a battery module, a battery bank, or a collection of battery cells (cell-to-pack structure).

[0055] According to one embodiment, the sensor unit (14) can obtain information related to the battery unit (12). According to one embodiment, the sensor unit (14) can obtain values ​​(or information) related to the state of each of the battery unit (12) or battery cells (10). In one embodiment, the values ​​related to the state may include one or more values ​​for voltage, current, resistance, state of charge (SOC), state of health (SOH), or temperature of the battery cell, or a combination thereof.

[0056] According to one embodiment, the sensor unit (14) can provide information on each of the plurality of battery units (12) to the battery management system (20).

[0057] According to one embodiment, the switching unit (16) may include a device for controlling the current flow for charging or discharging the battery unit (12). For example, the switching unit (16) may include at least one relay and / or magnetic contactor, etc., depending on the specifications of the battery pack (1).

[0058] According to one embodiment, a battery management system (BMS) (20) may monitor voltage, current, temperature, etc. of the battery pack (1) to control or manage the battery pack (1) to prevent overcharge, overdischarge, etc. For example, the battery management system (20) may include a plurality of terminals as an interface for receiving values ​​measured from the various parameters described above, and a circuit connected to these terminals to process the input values. In addition, the battery management system (20) may control the sensor unit (14) and / or the switching unit (16). For example, the battery management system (20) may be connected to a plurality of battery units (12) to monitor the status of each of the plurality of battery units (12) and control ON / OFF of a relay or a contactor, etc.

[0059] According to one embodiment, the operation of the battery management system (20) may be performed by a battery management system (BMS) in the vehicle, as well as by various devices such as a server, cloud, charger, or discharger.

[0060] The upper controller (2) can transmit control signals for multiple battery units (12) to the battery management system (20). Accordingly, the battery management system (20) can be controlled for operation based on signals received from the upper controller (2).

[0061] According to one embodiment, the battery management system (20) may include the battery state management device (201) of FIG. 2. According to another embodiment, the battery management system (20) may be a different system from the battery state management device (201) of FIG. 2. That is, the battery state management device (201) of FIG. 2 may be included in the battery pack (1) or may be configured as another device external to the battery pack (1). For convenience of explanation, the following description will be made on the assumption that the battery state management device (201) is configured as another device external to the battery pack (1). In addition, the operation of the battery state management device (201) below may be performed by an in-vehicle BMS (battery management system), as well as by various devices such as a server, a cloud, a charger, or a discharger.

[0062] Fig. 2 is a block diagram showing the configuration of a battery state management device according to an embodiment of the present document. Fig. 3 is a block diagram showing a battery state management device in a battery state management device and a battery state management method according to an embodiment of the present document.

[0063] Referring to FIGS. 2 and 3, the battery status management device (201, 300) may include a first sensor (203, 301), a switch (205, 309), and a power control circuit (207, 307).

[0064] A first sensor (203, 301), a second sensor (303), and a third sensor (305) can obtain measurement values ​​indicating the status of a battery unit. A first power supply circuit (302) that supplies power to the first sensor (203, 301) can include an LC filter (313) and a first low dropout (LDO) (315). A second power supply circuit (304) that supplies power to the second sensor (303), the third sensor (305), and an MCU (micro controller unit) (311) can include a third LDO (317) and a second LDO (319). An activation circuit (321) or a CAN (controller area network) transceiver (323) can be electrically connected to the second power supply circuit (304) and the MCU (311).

[0065] According to one embodiment, the battery state management device (201, 300) may be set to a low power mode according to power below a threshold in a designated situation where power exceeding a threshold is not required (e.g., a situation where a vehicle including a battery is parked, a situation where the vehicle including a battery is turned off). Since an output power exceeding a threshold is not required in the low power mode, the battery state management device (201, 300) may reduce power consumption of the battery state management device (201, 300), thereby increasing power efficiency of the battery.

[0066] According to one embodiment, the battery status management device (201, 300) may need to monitor for battery abnormalities (e.g., thermal runaway, collision) for safety reasons even in low-power mode. However, since monitoring for battery abnormalities also requires power, the battery status management device (201, 300) may reduce the power consumed for monitoring to improve power efficiency.

[0067] According to one embodiment, in the low power mode, for power efficiency, the first power supply circuit (302) supplies power to the first sensor (203, 301), and the switch (205, 309) electrically connecting the second power supply circuit (304) that supplies power to the second sensor (303) and the first power supply circuit (302) may be deactivated. Since the second sensor (303) receives power through the second power supply circuit (304), if the first power supply circuit (302) and the second power supply circuit (304) are not electrically connected, the second sensor (303) cannot receive power. In other words, in the low power mode, for power efficiency, the first sensor (203, 301) may be supplied with power, and the second sensor (303) may not be supplied with power.

[0068] According to one embodiment, the first sensor (203, 301) may include a pressure sensor that measures the pressure of a battery unit (e.g., a battery cell, a battery module, a battery pack, a battery), but the embodiment of the present document may not be limited thereto. According to one embodiment, the second sensor (303) or the third sensor (305) may include a gas sensor that detects whether a gas leak occurs, or a 3-axis sensor that detects the degree of movement of the battery, but the embodiment of the present document may not be limited thereto.

[0069] According to one embodiment, in the low power mode, an alarm signal transmitted from a central control unit (e.g., MCU of BMS) external to the battery state management device (201, 300) for power efficiency is transmitted to the power control circuit (207, 307), or an abnormal signal corresponding to the detection result of the first sensor (203, 301) (e.g., pressure of the battery unit) is transmitted from the first sensor (203, 301) to the power control circuit (207, 307), and the switch (205, 309) can electrically connect the first power supply circuit (302) and the second power supply circuit (304). The alarm signal and the abnormal signal will be described below with reference to FIG. 3.

[0070] According to one embodiment, when the battery status management device (201, 300) is in low power mode, all other components except the first sensor (203, 301) and the first power supply circuit (302) may be deactivated. According to one embodiment, the first power supply circuit (302) may include a capacitor-inductor-capacitor (CLC) filter instead of an inductor-capacitor (LC) filter (313). According to one embodiment, the first LDO (315) may adjust the voltage (Vbatt) of the power provided from the battery to a power level equivalent to the rated voltage of the first sensor (203, 301) and then provide the power to the first sensor (203, 301).

[0071] According to one embodiment, the first sensor (203, 301) can monitor whether the battery unit is abnormal. If the first sensor (203, 301) detects an abnormality in the battery unit, the first sensor (203, 301) can transmit an abnormality signal to the power control circuit (207, 307).

[0072] According to one embodiment, the power control circuit (207, 307) may provide voltage to the switch (205, 309) based on obtaining an alarm signal from a central control unit external to the battery condition management device (201, 300) or obtaining an abnormal signal from the first sensor (203, 301). Based on obtaining the voltage, the switch (205, 309) may electrically connect the first power supply circuit (302) and the second power supply circuit (304) to supply power to the second sensor (303), the third sensor (305), the activation circuit (321), the CAN transceiver (323), and the MCU (311). The switch (205, 309) may be referred to as a metal oxide semiconductor field effect transistor (MOSFET) switch, but the embodiment of the present document may not be limited thereto.

[0073] According to one embodiment, the second LDO (319) may adjust the voltage of the power provided from the battery to a power equivalent to the rated voltage of the second sensor (303) or the third sensor (305), and then provide the power to a sensor corresponding to the rated voltage (e.g., the second sensor (303) or the third sensor (305)).

[0074] According to one embodiment, the third LDO (317) can adjust the voltage (Vbatt) of the power provided from the battery to a voltage level requested by the circuit including the activation circuit (321) or the CAN transceiver (323), and then provide the voltage level to a circuit corresponding to the requested voltage level (e.g., the circuit including the activation circuit (321) or the CAN transceiver (323).

[0075] According to one embodiment, when the first power supply circuit (302) and the second power supply circuit (304) are electrically connected through the switch (205, 309) based on an abnormal signal of the first sensor (203, 301), in order to deal with an abnormality of the battery unit, the activation circuit (321) may transmit an activation signal for activating a central control device external to the battery state management device (201, 300) from the battery state management device (201, 300) to a central control device (e.g., an MCU of a BMS) external to the battery state management device (201, 300). The central control device external to the battery state management device (201, 300) may be activated based on the received activation signal. One terminal of the activation circuit (321) may be electrically connected to the central control device external to the battery state management device (201, 300). Another terminal of the activation circuit (321) may be electrically connected to a second power supply circuit (304). Another terminal of the activation circuit (321) may be electrically connected to an MCU (311).

[0076] According to one embodiment, when the first power supply circuit (302) and the second power supply circuit (304) are electrically connected through the switch (205, 309) due to an abnormal signal of the first sensor (203, 301), the MCU (311) may obtain at least one measurement value obtained from a sensor (e.g., the first sensor (203, 301), the second sensor (303), the third sensor (305)) included in the battery status management device (201, 300) to determine the status of the battery unit. The MCU (311) may transmit the at least one measurement value to the CAN transceiver (323). The CAN transceiver (323) may transmit the at least one measurement value obtained from the sensor to an external element (e.g., a central control device) of the battery status management device (201, 300). One terminal of the CAN transceiver (323) may be electrically connected to a second power supply circuit (304). The other terminal of the CAN transceiver (323) may be electrically connected to an MCU (311). A first terminal of the MCU (311) may be electrically connected to a first sensor (203, 301), a second terminal of the MCU (311) may be electrically connected to a second sensor (303), a third terminal of the MCU (311) may be electrically connected to a second power supply circuit (304), and a fourth terminal of the MCU (311) may be electrically connected to a power control circuit (207, 307).

[0077] According to one embodiment, in a situation where a central control device external to the battery state management device (201, 300) is activated (e.g., a situation where the vehicle's ignition is turned on and the MCU of the BMS is turned on), the power control circuit (207, 307) can obtain an alarm signal from the central control device external to the battery state management device (201, 300).

[0078] According to one embodiment, the power control circuit (207, 307) can electrically connect the first power supply circuit (302) and the second power supply circuit (304) by providing voltage to the switch (205, 309) when an alarm signal is obtained from a central control device external to the battery condition management device (201, 300).

[0079] FIG. 4 is a circuit diagram showing a switch and a power control circuit in a battery state management device and a battery state management method according to one embodiment of the present document.

[0080] Referring to FIG. 4, the first terminal (401) can be electrically connected to the first power supply circuit (302).

[0081] The second terminal (403) may be electrically connected to the second power supply circuit (304). The third terminal (407) may be electrically connected to a central control unit external to the battery status management device (201).

[0082] The third terminal (407) can receive an alarm signal from a central control device external to the battery status management device (201).

[0083] The fourth terminal (409) can be electrically connected to the first sensor (203). The fourth terminal (409) can receive an abnormal signal from the first sensor (203).

[0084] The fifth terminal (411) can be electrically connected to the MCU (311). The fifth terminal (411) can receive a signal indicating that power is supplied to the MCU (311) of the battery status management device (201) from the MCU (311).

[0085] According to one embodiment, when a signal indicating that power is supplied to the MCU (311) of the battery state management device (201) is obtained from the fifth terminal (411), the switch (e.g., switch (205), first switch (MOS 2), second switch (MOS 1)) can electrically connect the first terminal (401) and the second terminal (403) without continuously obtaining an alarm signal from the third terminal (407) or continuously obtaining an abnormal signal from the fourth terminal (409).

[0086] According to one embodiment, the third terminal (407) may be electrically connected to the first diode (D2). The first diode (D2) may be electrically connected to the third terminal (407) and the first resistor (R5). The first resistor (R5) may be electrically connected to the third terminal (407) and the first node (N1).

[0087] According to one embodiment, the fourth terminal (409) may be electrically connected to the second diode (D3). The second diode (D3) may be electrically connected to the fourth terminal (409), the fifth terminal (411), and the second resistor (R6). Although the second diode (D3) is illustrated as being simultaneously connected to the fourth terminal (409) and the fifth terminal (411), the embodiment of the present document may not be limited thereto. According to one embodiment, the fourth terminal (409) may be electrically connected to the second diode (D3) connected to the second resistor (R6), and the fifth terminal (411) may be electrically connected to another diode (not shown) connected to the second resistor (R6). The second resistor (R6) may be electrically connected to the second diode (D3) and the first node (N1).

[0088] According to one embodiment, a first node (N1) may be electrically connected to a first resistor (R5), a second resistor (R6), a third diode (D4), a third resistor (R7), and a first switch (MOS 2). The first switch (MOS 2) may represent an N-type MOSFET switch that connects a source terminal and a drain terminal when a voltage greater than a threshold voltage is applied to a gate terminal. The third diode (D4) may be electrically connected to the first node (N1), the third resistor (R7), and the ground. The third resistor (R7) may be electrically connected to the first node (N1), the third diode (D4), and the ground.

[0089] According to one embodiment, the first switch (MOS 2) may be electrically connected to ground and a fourth resistor (R2). The fourth resistor (R2) may be electrically connected to the second node (N2) and the first switch (MOS 2).

[0090] According to one embodiment, the second node (N2) may be electrically connected to a third diode (D1), a fifth resistor (R1), a first capacitor (C1), a second switch (MOS 1), and a fourth resistor (R2). The second switch (MOS 1) may represent a P-type MOSFET switch that connects a source terminal and a drain terminal when a voltage lower than a threshold voltage is applied to a gate terminal.

[0091] According to one embodiment, the third diode (D1) may be electrically connected to the third node (N3) and the second node (N2). The fifth resistor (R1) may be electrically connected to the third node (N3) and the second node (N2). The first capacitor (C1) may be electrically connected to the third node (N3) and the second node (N2). The second switch (MOS 1) may be electrically connected to the third node (N3), the second node (N2), and the second terminal (403).

[0092] According to one embodiment, the third node (N3) may be electrically connected to the first terminal (401), the third diode (D1), the fifth resistor (R1), the first capacitor (C1), and the first switch (MOS 1).

[0093] According to one embodiment, the second switch (MOS 1) may be electrically connected to the third node (N3), the second node (N2), and the second terminal (403).

[0094] According to one embodiment, the first switch (MOS 2) may be activated based on obtaining an alarm signal from the third terminal (407) or an abnormal signal from the fourth terminal (409). The alarm signal may be transmitted as a voltage signal according to a voltage of a specified first magnitude (e.g., about 5 V). The abnormal signal may be transmitted as a voltage signal according to a voltage of a specified second magnitude (e.g., about 3.3 V). A signal indicating that power is supplied to the MCU (311) of the battery state management device (201) may be transmitted as a signal according to a voltage of a specified third magnitude (e.g., about 3.3 V).

[0095] For example, an alarm signal (voltage signal) obtained from the third terminal (407) can be applied from a central control unit external to the battery status management device (201) to the first switch (MOS 2) according to the first diode (D2) and the first resistor (R5). The first diode (D2) can reduce the current flowing in the direction from the first resistor (R5) to the external central control unit. The first resistor (R5) can reduce the overvoltage applied to the first switch (MOS 2).

[0096] For example, an abnormal signal (voltage signal) obtained from the fourth terminal (409) or a signal (voltage signal) indicating that power is supplied to the MCU (311) of the battery status management device (201) obtained from the fifth terminal (411) may be applied to the first switch (MOS 2) according to the second diode (D3) and the second resistor (R6). The second diode (D3) may reduce the frequency of cases where current flows in the direction from the second resistor (R6) to the first sensor (203) or the MCU (311). The second resistor (R6) may reduce the frequency of cases where overvoltage is applied to the first switch (MOS 2).

[0097] In one embodiment, the third diode (D4) can reduce the current flow from ground to the first node (N1). The third resistor (R7) can reduce the frequency of the first switch (MOS 2) turning on due to a noise signal. The first capacitor (C1) can be arranged to protect the second switch (MOS 1).

[0098] The first diode (D2) can reduce the current flowing from the first resistor (R5) to the external central control device. By connecting the first resistor (R7) to ground, even if a noise signal is applied from the third terminal (407) to the fifth terminal (411), the voltage applied to the first switch (MOS 2) can be maintained below a voltage reference value (e.g., approximately 1.6 V) through voltage distribution.

[0099] According to one embodiment, when a signal (voltage signal) is applied from the third terminal (407) or the fourth terminal (409) and a voltage higher than a voltage reference value is applied to the gate terminal of the first switch (MOS 2), the first switch (MOS 2) may be activated. When the first switch (MOS 2) is activated, the first switch (MOS 2) may electrically connect the fourth resistor (R2) and the ground.

[0100] According to one embodiment, when the first switch (MOS 2) is activated, the voltage applied from the first terminal (401) can be distributed by the fifth resistor (R1) and the fourth resistor (R2). A voltage equal to the magnitude of the voltage applied to the fifth resistor (R1) can be applied to the second switch (MOS 1).

[0101] In one embodiment, the third diode (D1) can reduce the frequency of current flowing in the direction from the second node (N2) to the third node (N3).

[0102] When the first switch (MOS 2) is activated, the first terminal (401) and the second terminal (403) can be electrically connected based on the voltage lower than the threshold voltage being applied to the gate terminal of the second switch (MOS 1).

[0103] When the first switch (MOS 2) is disabled, the electrical connection between the first terminal (401) and the second terminal (403) can be disabled based on a voltage higher than the threshold voltage being applied to the gate terminal of the second switch (MOS 1).

[0104] According to one embodiment, the first terminal (401) and the second terminal (403) are electrically connected, so that the first power supply circuit (302) and the second power supply circuit (304) can be electrically connected. When the first power supply circuit (302) and the second power supply circuit (304) are electrically connected, the MCU (311) can be activated. When the MCU (311) is activated, a signal indicating that power is supplied to the MCU (311) of the battery status management device (201) can be input to the fifth terminal (411). When the fifth terminal (411) receives a signal indicating that power is supplied to the MCU (311) of the battery status management device (201), the electrical connection between the first terminal (401) and the second terminal (403) can be maintained even without continuously obtaining an alarm signal from the third terminal (407) or continuously obtaining an abnormal signal from the fourth terminal (409).

[0105] According to one embodiment, when the fifth terminal (411) does not receive a signal indicating that power is supplied to the MCU (311) of the battery status management device (201) and the alarm signal or abnormal signal is stopped from being input, the second switch (MOS 1) can disable the electrical connection between the first terminal (401) and the second terminal (403).

[0106] FIG. 5 is a circuit diagram showing an activation circuit in a battery state management device and a battery state management method according to one embodiment of the present document.

[0107] Referring to FIG. 5, the first terminal (501) may be electrically connected to the second power supply circuit (304). The second terminal (503) may be electrically connected to a central control unit external to the battery status management device (201). The third terminal (505) and the fourth terminal (507) may be electrically connected to the MCU (311).

[0108] The activation circuit can transmit a signal to a central control device external to the battery state management device (201) to activate the central control device based on the battery state management device (201) being activated as a whole by electrically connecting the first power supply circuit (302) and the second power supply circuit (304).

[0109] The first switch (MOS 2) may represent an N-type MOSFET switch that connects the source terminal and the drain terminal when a voltage greater than the threshold voltage is applied to the gate terminal. The second switch (MOS 1) may represent a P-type MOSFET switch that connects the source terminal and the drain terminal when a voltage less than the threshold voltage is applied to the gate terminal.

[0110] According to one embodiment, the fourth terminal (507) may be electrically connected to the first resistor (R7). The first resistor (R7) may be electrically connected to the fourth terminal (507), the second resistor (R8), and the first switch (MOS 2). The first switch (MOS 2) may be electrically connected to the second resistor (R8), the third resistor (R6), and ground. The third resistor (R6) may be electrically connected to the first switch (MOS 2), the fourth resistor (R1), and the second switch (MOS 1). The fourth resistor (R1) may be electrically connected to the first terminal (501), the second switch (MOS 1), and the third resistor (R6). The first terminal (501) may be electrically connected to the fourth resistor (R1) and the second switch (MOS 1). The second switch (MOS 1) may be electrically connected to the first terminal (501), the fourth resistor (R1), the third resistor (R6), and the fifth resistor (R3). The fifth resistor (R3) may be electrically connected to the second terminal (503) and the third terminal (505). The second terminal (503) may be electrically connected to the fifth resistor (R3). The third terminal (505) may be electrically connected to the fifth resistor (R3) and the second switch (MOS 1).

[0111] According to one embodiment, when the first power supply circuit (302) and the second power supply circuit (304) are electrically connected, a voltage may be applied to the first terminal (501). However, since the first switch (MOS 2) is deactivated and a voltage higher than the threshold voltage is provided to the second switch (MOS 1), the first terminal (501) and the second terminal (503) may not be electrically connected.

[0112] According to one embodiment, when the first power supply circuit (302) and the second power supply circuit (304) are electrically connected, the fourth terminal (507) can obtain a signal from the MCU (311) indicating that the MCU (311) is activated.

[0113] According to one embodiment, the first resistor (R7) can protect the first switch (MOS 2) when an overcurrent flows. A voltage can be applied to the first switch (MOS 2) equal to the magnitude of the voltage applied to the second resistor (R8).

[0114] According to one embodiment, a signal indicating that the MCU (311) obtained from the third terminal (507) is activated can activate the first switch (MOS 2) by applying a voltage greater than the threshold voltage to the first switch (MOS 2). When the first switch (MOS 2) is activated, the third resistor (R6) and the ground can be electrically connected.

[0115] When the third resistor (R6) and the ground are electrically connected, the voltage distributed by the fourth resistor (R1) and the third resistor (R6) can be applied to the second switch (MOS 1).

[0116] When the third resistor (R6) and the ground are not electrically connected, the voltage applied to the second switch (MOS 1) is higher than the threshold voltage value, so the second switch (MOS 1) may not be activated. When the third resistor (R6) and the ground are electrically connected, the voltage applied to the second switch (MOS 1) is lower than the threshold voltage value, so the second switch (MOS 1) may be activated.

[0117] According to one embodiment, the second switch (MOS 1) may be activated to electrically connect the first terminal (501) and the second terminal (503).

[0118] According to one embodiment, the second terminal (503) may provide a signal to the central control device external to the battery state management device (201) that activates the central control device external to the battery state management device (201). The fifth resistor (R3) may reduce the frequency of overcurrent flowing to the external central control device.

[0119] According to one embodiment, the third terminal (505) may transmit a signal to the MCU (311) indicating that the activation circuit (321) has output a signal activating a central control device external to the battery state management device (201).

[0120] FIG. 6 illustrates a flow of operations of a battery state management device that operates an abnormality detection module included in a battery state management device and a battery state management method according to one embodiment of the present document.

[0121] Referring to FIG. 6, in the first operation (601), the entire anomaly detection module according to one embodiment can operate.

[0122] According to one embodiment, the abnormality detection module may be a module included in the battery status management device (201) and monitors the status of the battery unit. The abnormality detection module may include a first power supply circuit (302), a second power supply circuit (304), a first sensor (203, 301), a second sensor (303), a power control circuit (207, 307), an MCU (311), an activation circuit (321), and a CAN transceiver (323).

[0123] In the second operation (603), according to one embodiment, the abnormality detection module may be switched to a low power mode based on a vehicle start-up termination signal.

[0124] In a third operation (605), a switch (205) according to one embodiment may disable the electrical connection between the first power supply circuit (302) and the second power supply circuit (304).

[0125] In one embodiment, the electrical connection between the first power supply circuit (302) and the second power supply circuit (304) may be disabled by disabling the switch (205) for power efficiency.

[0126] In the fourth operation (607), the first sensor (203) according to one embodiment can monitor whether the battery unit is abnormal.

[0127] According to one embodiment, the first sensor (203) may include a pressure sensor that measures the pressure of the battery unit.

[0128] In the fifth operation (609), the power control circuit (207) according to one embodiment can identify whether an alarm signal has been transmitted to the power control circuit (207) from a central control device external to the abnormality detection module. If the alarm signal has been transmitted to the power control circuit (207) from the central control device external to the abnormality detection module, the MCU (311) and the abnormality detection module can perform the sixth operation (611). If the alarm signal has not been transmitted to the power control circuit (207) from the central control device external to the abnormality detection module, the power control circuit (207) can perform the seventh operation (613).

[0129] In the sixth operation (611), the electrical connection between the first power supply circuit (302) and the second power supply circuit (304) according to one embodiment is activated, so that power is supplied to the MCU (311) and the entire abnormality detection module can operate.

[0130] According to one embodiment, the power control circuit (207) can activate the switch (205) by providing voltage to the switch (205). By activating the switch (205), the first power supply circuit (302) and the second power supply circuit (304) can be electrically connected. By electrically connecting the first power supply circuit (302) and the second power supply circuit (304), the entire abnormality detection module can operate.

[0131] In the seventh operation (613), the power control circuit (207) according to one embodiment can identify whether an abnormal signal has been transmitted from the first sensor (203) to the power control circuit (207). If the abnormal signal has been transmitted from the first sensor (203) to the power control circuit (207), the first power supply circuit (302) and the second power supply circuit (304) can perform the eighth operation (615). If the abnormal signal has not been transmitted from the first sensor (203) to the power control circuit (207), the first sensor (203) can perform the fourth operation (607).

[0132] According to one embodiment, an abnormal signal may be transmitted from the first sensor (203) to the power control circuit (207) when an abnormality in the battery unit is identified based on measurement values ​​obtained from the first sensor (203).

[0133] In the eighth operation (615), the electrical connection between the first power supply circuit (302) and the second power supply circuit (304) according to one embodiment is activated, thereby supplying power to the MCU (311) and enabling the entire abnormality detection module to operate.

[0134] In the ninth operation (617), the activation circuit (321) according to one embodiment can transmit a signal to a central control device external to the anomaly detection module to activate the central control device.

[0135] According to one embodiment, the activation circuit (321) can transmit a signal to the central control unit to activate the central control unit external to the battery condition management device (201) to analyze an abnormality in the battery unit and to activate the central control unit to deal with the abnormality in the battery unit. This is because, when an abnormality signal is transmitted from the first sensor (203), the central control unit external to the abnormality detection module is likely to be deactivated.

[0136] FIG. 7 illustrates the flow of operations of a battery state management device electrically connecting a second power supply circuit (304) to a first power supply circuit (302) in a battery state management device and a battery state management method according to one embodiment of the present document.

[0137] Referring to FIG. 7, in the first operation (701), the first sensor (203) according to one embodiment can be supplied with constant power through the first power supply circuit (302) and detect the status of the battery unit.

[0138] In the second operation (703), the power control circuit (207) can control the operation of the switch (205) in response to an abnormal signal corresponding to the detection result of the first sensor (203).

[0139] In the third operation (705), the switch (205) can electrically connect the second power supply circuit (304) with the first power supply circuit (302).

[0140] FIG. 8 is a block diagram showing the hardware configuration of a computing system that performs a battery state management method in a battery state management device and a battery state management method according to one embodiment of the present document.

[0141] Referring to FIG. 8, a computing system (800) according to an embodiment disclosed in the present document may include an MCU (810), a memory (820), an input / output I / F (830), and a communication I / F (840).

[0142] The MCU (810) may be one or more processors that execute various programs stored in the memory (820) (e.g., a battery cell data collection program, a graph generation program, a data analysis program, a data decomposition algorithm, a normalization program, a battery cell diagnosis program, etc.), process various information including battery cell characteristic data and latent variables through these programs, and perform the functions of the battery state management device (201) shown in the above-described FIGS. 1 to 8.

[0143] The memory (820) can store various programs such as a battery cell data collection program, a graph generation program, a data analysis program, a data decomposition algorithm, a normalization program, and a battery cell diagnosis program.

[0144] Such memories (820) may be provided in multiples as needed. The memories (820) may be volatile memories or non-volatile memories. As volatile memories (820), RAM, DRAM, SRAM, etc. may be used. As non-volatile memories (820), ROM, PROM, EAROM, EPROM, EEPROM, flash memories, etc. may be used. The examples of the memories (820) listed above are merely examples and are not limited to these examples.

[0145] The input / output I / F (830) 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 (810).

[0146] The communication I / F (840) 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, the battery status management device (201) can transmit and receive various types of information, including battery cell shape models, from a separately provided external server via the communication I / F (840).

[0147] In this way, a computer program according to an embodiment disclosed in this document may be implemented as a module that performs each function illustrated in FIG. 2, for example, by being recorded in a memory (820) and processed by an MCU (810).

[0148] In the above, although all components constituting the embodiments disclosed in this document have been described as being combined or operating in combination as one, the embodiments disclosed in this document are not necessarily limited to such embodiments. That is, within the scope of the purpose of the embodiments disclosed in this document, all of the components may be selectively combined and operated one or more times.

[0149] In addition, terms such as "include," "comprise," or "have" described above, unless specifically stated to the contrary, should be interpreted to imply the inclusion of the corresponding component, and thus should not be interpreted to exclude other components, but rather to include 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 belong, unless otherwise defined. Commonly used terms, such as terms defined in a dictionary, should be interpreted to be consistent with the contextual meaning of the relevant technology, and shall not be interpreted in an idealized or overly formal sense, unless explicitly defined in this document.

[0150] The foregoing disclosure outlines features of several embodiments to enable those skilled in the art to better understand the aspects of the present disclosure. Those skilled in the art will readily appreciate that the present disclosure can be readily used as a basis for designing or modifying other structures to achieve the same purposes or advantages of the embodiments introduced herein. Furthermore, those skilled in the art will recognize that such equivalent structures do not depart from the scope of the present disclosure, and that various changes, substitutions, and modifications can be made herein without departing from the scope of the present disclosure.

Claims

1. A first sensor that is constantly supplied with power through a first power supply circuit and detects the status of the battery unit; A switch electrically connecting a second power supply circuit that supplies power to a second sensor different from the first sensor to the first power supply circuit; and Including a power control circuit that controls the operation of the switch in response to an abnormal signal corresponding to the detection result of the first sensor. Battery health management device.

2. In claim 1, The above power control circuit, configured to control the operation of the switch by providing voltage to the switch in response to acquiring the above abnormal signal or acquiring an alarm signal, Battery health management device.

3. In claim 1, The above switch is, A second power supply circuit is electrically connected to the first power supply circuit, and is configured to supply power to the second sensor based on obtaining voltage from the power supply circuit, and is electrically connected to the power control circuit. Battery health management device.

4. In claim 1, The above first power supply circuit, At least one of an LC (inductor-capacitor) filter, a CLC (capacitor-inductor-capacitor) filter, or any combination thereof; and It is configured to include a first LDO (low dropout; LDO) that provides power equivalent to the rated voltage of the first sensor to the first sensor, The above second power supply circuit, It is configured to include a second LDO that provides power equivalent to the rated voltage of the second sensor to the second sensor. Battery health management device.

5. In claim 1, Based on the electrical connection of the first power supply circuit and the second power supply circuit, the battery state management device further includes an activation circuit that transmits a signal for activating a central control device external to the central control device, One terminal of the above activation circuit is, configured to be electrically connected to the central control device; The other terminal of the above activation circuit is, configured to be electrically connected to the second power supply circuit, Battery health management device.

6. In claim 1, The first terminal further includes an MCU (micro controller unit) electrically connected to the first sensor, The second terminal of the above MCU is, configured to be electrically connected to the second sensor, The third terminal of the above MCU is, configured to be electrically connected to the second power supply circuit, The fourth terminal of the above MCU is, configured to be electrically connected to the above power control circuit, Battery health management device.

7. In claim 6, One terminal further includes a CAN (controller area network) transceiver electrically connected to the second power supply circuit, The other terminal of the above CAN transceiver is, configured to be electrically connected to the above MCU, Battery health management device.

8. In claim 1, The above first sensor, In a low power mode according to power below the reference value, it is configured to be supplied with power through the first power supply circuit, The second sensor above, In the above low power mode, power is supplied depending on whether the first power supply circuit and the second power supply circuit are electrically connected. Battery health management device.

9. An operation of constantly supplying power through the first power supply circuit by the first sensor and detecting the status of the battery unit; An operation of controlling the operation of a switch in response to an abnormal signal corresponding to the detection result of the first sensor by a power control circuit; and An operation of electrically connecting a second power supply circuit, which supplies power to a second sensor different from the first sensor, with the first power supply circuit by the switch, How to manage battery health.

10. In claim 9, By the above power control circuit, In response to acquiring an alarm signal, the device further comprises an operation for controlling the operation of the switch by providing a voltage to the switch. How to manage battery health.

11. In claim 9, An operation of electrically connecting the second power supply circuit, which supplies power to the second sensor, which is different from the first sensor, with the first power supply circuit by the switch, By the switch, the switch is electrically connected to the power control circuit, and based on obtaining voltage from the power supply circuit, the second power supply circuit is electrically connected to the first power supply circuit to supply power to the second sensor. How to manage battery health.

12. In claim 9, The above first power supply circuit, At least one of an LC filter, a CLC filter, or any combination thereof; and Includes a first LDO (low dropout; LDO) that provides power to the first sensor equivalent to the rated voltage of the first sensor, The above second power supply circuit, It is configured to include a second LDO that provides power equivalent to the rated voltage of the second sensor to the second sensor. How to manage battery health.

13. In claim 9, Further comprising an operation of transmitting a signal for activating a central control device external to the battery state management device to the central control device based on the electrical connection of the first power supply circuit and the second power supply circuit by the activation circuit, One terminal of the above activation circuit is, configured to be electrically connected to the above central control device; The other terminal of the above activation circuit is, configured to be electrically connected to the second power supply circuit, How to manage battery health.

14. In claim 9, Further comprising an operation of transmitting at least one of the measurement value of the first sensor, the measurement value of the second sensor, or any combination thereof to a CAN (controller area network) transceiver by an MCU (micro controller unit), The first terminal of the above MCU is, configured to be electrically connected to the above first sensor, The second terminal of the above MCU is, configured to be electrically connected to the second sensor, The third terminal of the above MCU is, configured to be electrically connected to the second power supply circuit, The fourth terminal of the above MCU is, configured to be electrically connected to the above power control circuit, How to manage battery health.

15. In claim 14, Further comprising an operation of identifying at least one of a measurement value of the first sensor, a measurement value of the second sensor, or any combination thereof, by the CAN transceiver; One terminal of the above CAN transceiver is, configured to be electrically connected to the second power supply circuit, The other terminal of the above CAN transceiver is, configured to be electrically connected to the above MCU, How to manage battery health.

16. In claim 9, The above first sensor, In a low power mode according to power below the reference value, it is configured to be supplied with power through the first power supply circuit, The second sensor above, In the above low power mode, power is supplied depending on whether the first power supply circuit and the second power supply circuit are electrically connected. How to manage battery health.

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