Battery management device and operating method thereof

Abstract

A battery management apparatus according to an embodiment disclosed herein may include: a measurement unit that measures a temperature and a voltage of each of a plurality of battery cells; and a controller that generates first information of each of the plurality of battery cells based on whether the plurality of battery cells are charging or discharging, a temperature of each of the plurality of battery cells over time, and a voltage of each of the plurality of battery cells over time, and identifying a degraded battery cell of the plurality of battery cells based on the first information of each of the plurality of battery cells.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2022-0115234, filed on September 13, 2022, which is hereby incorporated by reference in its entirety. Technical Field

[0004] Embodiments disclosed herein relate to a battery management device and an operating method thereof. Background Art

[0005] Recently, the research and development of secondary batteries are being actively carried out. Here, the secondary battery as a rechargeable / dischargeable battery can include all conventional nickel (Ni) / cadmium (Cd) batteries, Ni / metal hydride (MH) batteries, etc., and recent lithium-ion batteries. Among the secondary batteries, lithium-ion batteries have an energy density much higher than that of conventional Ni / Cd batteries, Ni / MH batteries, etc. In addition, lithium-ion batteries can be made small and light, so that lithium-ion batteries have been used as power sources for mobile devices, and recently, the use range of lithium-ion batteries has been expanded to power sources for electric vehicles, attracting attention as the next generation of energy storage media.

[0006] In battery cells forming a high voltage battery system, it is necessary to detect degraded battery cells that may impair the performance and safety of the battery system. Currently, there is a method of determining the state of health based on an average state of health (SoH) calculated by a battery management system when the battery cells are welded and applied in a series / parallel structure, and there is also a method of detecting degraded battery cells based on the temperature of the battery pack / module measured by the battery management system. Summary of the invention

[0007] [Technical issues]

[0008] Embodiments disclosed herein are directed to a battery management device and an operating method thereof, in which the voltage of a battery cell and the temperature of the battery cell can be considered together to determine a deteriorated battery cell using differences in temperature and voltage fluctuations with respect to a time axis.

[0009] Technical problems of the embodiments disclosed herein are not limited to the above-mentioned technical problems, and other unmentioned technical problems will be clearly understood by those of ordinary skill in the art from the following description.

[0010] [Technical solution]

[0011] A battery management device according to an embodiment disclosed herein may include: a measuring unit configured to measure a temperature and a voltage of each of a plurality of battery cells; and a controller configured to generate first information of each of a plurality of battery cells based on whether the plurality of battery cells are being charged or discharged, and based on a time-specific temperature of each of the plurality of battery cells and a time-specific voltage of each of the plurality of battery cells, and determine a degraded battery cell among the plurality of battery cells based on the first information of each of the plurality of battery cells.

[0012] In an embodiment, the controller may also be configured to: when a plurality of battery cells are being charged, generate second information by subtracting an initial temperature from a time-specific temperature of each of the plurality of battery cells, generate third information by subtracting an initial voltage from a time-specific voltage of each of the plurality of battery cells and negatively inverting the result, and generate a difference between the second information and the third information as the first information.

[0013] In an embodiment, the controller may also be configured to: when a plurality of battery cells are discharging, generate second information by subtracting an initial temperature from a time-specific temperature of each of the plurality of battery cells, generate third information by subtracting an initial voltage from a time-specific voltage of each of the plurality of battery cells, and generate a difference between the second information and the third information as the first information.

[0014] In an embodiment, the controller may be further configured to determine a battery cell whose time-specific change in the first information differs from other battery cells by a preset value or more as a degraded battery cell.

[0015] In an embodiment, the controller may be further configured to determine a battery cell whose first information differs from other battery cells by a preset value or more as a degraded battery cell.

[0016] In an embodiment, the measuring unit may be further configured to measure current flowing through the plurality of battery cells, and the controller may be further configured to determine that the plurality of battery cells are being charged when the current has a positive value, and to determine that the plurality of battery cells are being discharged when the current has a negative value.

[0017] In an embodiment, the controller may be further configured to: when the states of the plurality of battery cells are changed from charging to discharging or from discharging to charging, regenerate the first information based on a time of state change.

[0018] In an implementation, the measuring unit may include a plurality of temperature sensors, and the number of the temperature sensors may correspond to the number of battery cells.

[0019] An operating method of a battery management device according to an embodiment disclosed herein may include: measuring a temperature and a voltage of each of a plurality of battery cells; generating first information of each of a plurality of battery cells based on whether the plurality of battery cells are being charged or discharged, and based on a time-specific temperature of each of the plurality of battery cells and a time-specific voltage of each of the plurality of battery cells; and determining a degraded battery cell among the plurality of battery cells based on the first information of each of the plurality of battery cells.

[0020] In an embodiment, generating first information of each of the multiple battery cells based on whether the multiple battery cells are being charged or discharged, and based on the time-specific temperature of each of the multiple battery cells and the time-specific voltage of each of the multiple battery cells may include: determining whether the multiple battery cells are being charged or discharged; when the multiple battery cells are being charged, generating second information by subtracting an initial temperature from the time-specific temperature of each of the multiple battery cells, generating third information by subtracting the initial voltage from the time-specific voltage of each of the multiple battery cells and negatively inverting the result, and generating the difference between the second information and the third information as the first information.

[0021] In an embodiment, generating first information of each of the multiple battery cells based on whether the multiple battery cells are charging or discharging, and based on the time-specific temperature of each of the multiple battery cells and the time-specific voltage of each of the multiple battery cells may include: determining whether the multiple battery cells are charging or discharging; when the multiple battery cells are discharging, generating second information by subtracting an initial temperature from the time-specific temperature of each of the multiple battery cells, generating third information by subtracting the initial voltage from the time-specific voltage of each of the multiple battery cells, and generating the difference between the second information and the third information as the first information.

[0022] In an embodiment, the operating method may further include: measuring a current flowing through the plurality of battery cells; and determining that the plurality of battery cells are being charged when the current has a positive value, and determining that the plurality of battery cells are being discharged when the current has a negative value.

[0023] [Beneficial Effects]

[0024] The battery state management device and the operating method thereof according to the embodiments disclosed herein may generate new information based on the voltage of the battery cell and the temperature of the battery cell, and determine a degraded battery cell based on the generated information.

[0025] A battery state management device and an operating method thereof according to an embodiment disclosed herein may determine a deteriorated battery cell by differently generating information based on whether a plurality of battery cells are being charged or discharged.

[0026] The battery management device and the operating method thereof according to the embodiments disclosed herein may generate first information related to the temperature and voltage of each of a plurality of battery cells, and determine a degraded battery cell based on a time-specific variation amount of the generated first information.

[0027] The battery management device and the operating method thereof according to the embodiments disclosed herein can measure the temperature of each of the multiple battery cells based on multiple temperature sensors corresponding to the number of the multiple battery cells, and consider the temperature of each of the multiple battery cells together with the voltage of each of the multiple battery cells, so as to more accurately determine the degraded battery cells.

[0028] Furthermore, various effects directly or indirectly recognized from the present disclosure can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a block diagram showing the configuration of a general battery pack.

[0030] Figure 2 is a block diagram of a battery management device according to an embodiment disclosed herein.

[0031] Figure 3 Examples of multiple battery cells and battery management devices according to embodiments disclosed herein are shown.

[0032] Figure 4 and Figure 5 An example is shown in which the battery management device according to the embodiment disclosed herein generates first information based on charging / discharging to determine a deteriorated battery cell.

[0033] Figure 6 is a flowchart illustrating an operating method of a battery management device according to an embodiment disclosed herein.

[0034] Figures 7 and 8 is a flowchart illustrating in detail an operation method of a battery management device according to an embodiment disclosed herein.

[0035] Fig. 9 is a block diagram illustrating a hardware configuration of a computing system for executing an operating method of a battery management device according to an embodiment disclosed herein. DETAILED DESCRIPTION

[0036] Hereinafter, the embodiments disclosed herein will be described in detail with reference to the exemplary drawings. When adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals even if they are indicated in different drawings. In addition, when describing the embodiments disclosed herein, when it is determined that the detailed description of the related known configuration or function interferes with the understanding of the embodiments disclosed herein, its detailed description will be omitted.

[0037] In order to describe the components of the embodiments disclosed herein, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only used to distinguish one component from another component, and do not limit the component to the nature, order, sequence, etc. of the component. Unless these terms are defined differently, the terms used herein (including technical terms and scientific terms) have the same meaning as the terms commonly understood by those skilled in the art. The terms defined in commonly used dictionaries should be interpreted as having the same meaning as the contextual meaning of the relevant technology, and should not be interpreted as having an ideal or exaggerated meaning unless they are clearly defined in this application.

[0038] Figure 1 is a block diagram showing the configuration of a general battery pack.

[0039] Reference Figure 1 , schematically shows a battery control system according to an embodiment of the present disclosure, the battery control system including a battery pack 1 and a higher-level controller 2 included in a higher-level system.

[0040] like Figure 1 As shown, the battery pack 1 may include: a battery module 10, which includes one or more battery cells and is chargeable / dischargeable; a switch unit 14, which is connected in series to the positive (+) terminal side or the negative (-) terminal side of the battery module 10 to control the charge / discharge current flow of the battery module 10; and a battery management system 20, which controls and manages to prevent overcharge and overdischarge by monitoring the voltage, current, temperature, etc. of the battery pack 1. The battery pack 1 may include the battery module 10, the sensor 12, the switch unit 14, and the battery management system 20 provided in plural form.

[0041] Here, for example, at least one relay, magnetic contactor, or the like may be used as the switch unit 14 , which is an element for controlling the flow of current for charging or discharging of the plurality of battery modules 10 , according to the specifications of the battery pack 1 .

[0042] The battery management system 20 as an interface for receiving the measurement values ​​of the above-mentioned various parameter values ​​may include a plurality of terminals and circuits connected to the plurality of terminals to process the input values, etc. In addition, the battery management system 20 may control the on / off of the switch unit 14 (e.g., a relay, a contactor, etc.), and may be connected to the battery module 10 to monitor the state of each battery module 10. According to an embodiment, the battery management system 20 may include Figure 2 According to another embodiment, the battery management system 20 may be different from Figure 2 That is, Figure 2 The battery management apparatus 100 may be included in the battery pack 1 , and may be configured as other equipment outside the battery pack 1 .

[0043] The higher-level controller 2 may transmit a control signal regarding the battery module 10 to the battery management system 20. Therefore, the battery management system 20 may also be controlled according to its operation based on the signal applied from the higher-level controller 2.

[0044] Figure 2 is a block diagram of a battery management device according to an embodiment disclosed herein.

[0045] Reference Figure 2 According to the embodiment disclosed herein, the battery management device 100 may include a measuring unit 110 and a controller 120. According to the embodiment, the battery management device 100 may include Figure 1 The battery management system 20 may be Figure 1 The battery management system 20 is different from other devices.

[0046] The measuring unit 110 may measure the temperature and voltage of each of the plurality of battery cells. For example, the measuring unit 110 may measure the temperature and voltage of each of the plurality of battery cells at specific time intervals. According to an embodiment, the measuring unit 110 may include a temperature sensor and a voltage sensor.

[0047] According to an embodiment, the measuring unit 110 may further include a current sensor. For example, the measuring unit 110 may measure the current of a plurality of battery cells.

[0048] Figure 3 Examples of multiple battery cells and battery management devices according to embodiments disclosed herein are shown.

[0049] Reference Figure 3 According to the embodiment disclosed herein, the battery management device may include a plurality of temperature sensors 111, a current sensor 112, and a controller 120. According to the embodiment, the plurality of temperature sensors 111 and the current sensor 112 may be included in Figure 2According to an embodiment, the controller 120 may be connected with Figure 2 The controller 120 is substantially the same.

[0050] The number of temperature sensors included in the plurality of temperature sensors 111 may correspond to the number of battery cells. For example, a certain number of temperature sensors may be attached to each of the plurality of battery cells 200. Figure 3 Attachment of two temperature sensors capable of measuring the temperatures of 2K and 10K of the plurality of battery cells 200 is shown in FIG. 1 , but the number of temperature sensors may be equal to the number of battery cells without being limited thereto.

[0051] The information measured in the plurality of temperature sensors 111 and the current sensors 112 may be transmitted to the controller 120. The controller 120 may determine whether the plurality of battery cells 200 are being charged or discharged, whether there are degraded battery cells among the plurality of battery cells 200, etc. based on the information received from the plurality of temperature sensors 111 and the current sensors 112.

[0052] Reference Figure 2 , the controller 120 may determine whether each of the plurality of battery cells is being charged or discharged. For example, the controller 120 may determine that the plurality of battery cells are being charged when the current measured in the current sensor has a positive value, and determine that the plurality of battery cells are being discharged when the current has a negative value.

[0053] The controller 120 may generate first information for each of the plurality of battery cells based on whether the plurality of battery cells are being charged or discharged, and based on a time-specific temperature of each of the plurality of battery cells and a time-specific voltage of each of the plurality of battery cells. For example, the controller 120 may generate the first information in different ways depending on whether the plurality of battery cells are being charged or discharged.

[0054] According to an embodiment, when a plurality of battery cells are being charged, the controller 120 may generate the second information by subtracting the initial temperature from the time-specific temperature of each of the plurality of battery cells. In addition, the controller 120 may generate the third information by subtracting the initial voltage from the time-specific voltage of each of the plurality of battery cells and negatively inverting the result. In this case, the controller 120 may generate the difference between the second information and the third information as the first information.

[0055] According to an embodiment, when the plurality of battery cells are being discharged, the controller 120 may generate the second information by subtracting the initial temperature from the time-specific temperature of each of the plurality of battery cells. In addition, the controller 120 may generate the third information by subtracting the initial voltage from the time-specific voltage of each of the plurality of battery cells. In this case, the controller 120 may generate the difference between the second information and the third information as the first information.

[0056] The controller 120 may determine a degraded battery cell among the plurality of battery cells based on the first information of each of the plurality of battery cells. For example, the controller 120 may determine a degraded battery cell among the plurality of battery cells by comparing the first information of each of the plurality of battery cells.

[0057] According to an embodiment, the controller 120 may determine a battery cell, in which a change in the first information with respect to time is different from other battery cells by a preset value or more, as a degraded battery cell.

[0058] According to another embodiment, the controller 120 may determine a battery cell whose first information differs from other battery cells by a preset value or more as a degraded battery cell.

[0059] When a battery cell deteriorates, the internal resistance may increase and the capacity may deteriorate, and as the internal resistance increases, the temperature change and the voltage change during charging or discharging may increase, so that the controller 120 can determine the deteriorated battery cell based on the change range of the first information related to the temperature and voltage or the size of the first information.

[0060] According to an embodiment, when the state of the plurality of battery cells changes from charging to discharging, the controller 120 may regenerate the first information when the state changes. For example, since the method of generating the first information differs between a case where the plurality of battery cells are being charged and a case where the plurality of battery cells are being discharged, the controller 120 may regenerate the first information when the state changes.

[0061] According to an embodiment, when the state of the plurality of battery cells changes from discharge to charge, the controller 120 may regenerate the first information when the state changes. For example, since the method of generating the first information differs between a case where the plurality of battery cells are discharging and a case where the plurality of battery cells are charging, the controller 120 may regenerate the first information when the state changes.

[0062] Therefore, the battery management device 100 according to the embodiment disclosed herein may accurately determine the deteriorated battery cell regardless of a situation in which a plurality of battery cells are being charged and a situation in which a plurality of battery cells are being discharged.

[0063] Figure 4 and Figure 5 An example is shown in which the battery management device according to the embodiment disclosed herein generates first information based on charging / discharging to determine a deteriorated battery cell.

[0064] Reference Figure 4 , the measuring unit 110 of the battery management device 100 according to the embodiment disclosed herein may measure currents of the plurality of battery cells, and the controller 120 may determine that the plurality of battery cells are being charged.

[0065] The measuring unit 110 may measure a time-specific temperature 310 of each of the plurality of battery cells and a time-specific voltage 320 of each of the plurality of battery cells. In this case, a degraded battery cell may have time-specific variations of temperature and voltage measured to be greater than those of a normal battery cell.

[0066] The controller 120 may generate the first information based on the time-specific temperature 310 of each of the plurality of battery cells and the time-specific voltage 320 of each of the plurality of battery cells. For example, the controller 120 may subtract the initial temperature from the time-specific temperature 310 of each of the plurality of battery cells to generate the second information 330. In addition, the controller 120 may subtract the initial voltage from the time-specific voltage 320 of each of the plurality of battery cells and negatively invert the result to generate the third information 340. In this case, the controller 120 may generate the difference between the second information 330 and the third information 340 as the first information 350.

[0067] That is, the controller 120 may generate the first information by adjusting the time-specific temperature 310 of each of the plurality of battery cells and the time-specific voltage 320 of each of the plurality of battery cells to the same reference point (eg, 0).

[0068] The controller 120 may determine a degraded battery cell based on the generated first information. For example, the controller 120 may determine a battery cell whose time-specific change amount of the first information differs from other battery cells by a preset value or more as a degraded battery cell.

[0069] Reference Figure 5 , the measuring unit 110 of the battery management device 100 according to the embodiment disclosed herein may measure currents of the plurality of battery cells, and the controller 120 may determine that the plurality of battery cells are being discharged.

[0070] The measuring unit 110 may measure a time-specific temperature 410 of each of the plurality of battery cells and a time-specific voltage 420 of each of the plurality of battery cells. In this case, a degraded battery cell may have time-specific variations of temperature and voltage measured to be greater than those of a normal battery cell.

[0071] The controller 120 may generate the first information based on the time-specific temperature 410 of each of the plurality of battery cells and the time-specific voltage 420 of each of the plurality of battery cells. For example, the controller 120 may subtract the initial temperature from the time-specific temperature 410 of each of the plurality of battery cells to generate the second information 430. In addition, the controller 120 may subtract the initial voltage from the time-specific voltage 420 of each of the plurality of battery cells to generate the third information 440. In this case, the controller 120 may generate the difference between the second information 430 and the third information 440 as the first information 450.

[0072] That is, the controller 120 may generate the first information by adjusting the time-specific temperature 410 of each of the plurality of battery cells and the time-specific voltage 420 of each of the plurality of battery cells to the same reference point (eg, 0).

[0073] The controller 120 may determine a degraded battery cell based on the generated first information. For example, the controller 120 may determine a battery cell whose time-specific change amount of the first information differs from other battery cells by a preset value or more as a degraded battery cell.

[0074] According to an embodiment, the battery management device 100 according to the embodiment disclosed herein can generate new information (e.g., first information) by jointly considering the temperatures and voltages of multiple battery cells, and determine the degraded battery cells based on the generated information, thereby determining the degraded battery cells more accurately than using temperature or voltage alone.

[0075] Furthermore, the battery management device 100 according to the embodiment disclosed herein may determine a degraded battery cell by jointly considering the temperatures and voltages of a plurality of battery cells, thereby preventing erroneous determination of a degraded battery cell due to an error in either temperature or voltage.

[0076] The battery management device according to the embodiment disclosed herein may generate first information related to the temperature and voltage of each of a plurality of battery cells, and determine a degraded battery cell based on a time-specific variation amount of the generated first information.

[0077] According to the embodiment disclosed in this article, the battery management device can measure the temperature of each of the multiple battery cells based on multiple temperature sensors corresponding to the number of the multiple battery cells, and consider the temperature of each of the multiple battery cells together with the voltage of each of the multiple battery cells, so as to more accurately determine the degraded battery cell.

[0078] Figure 6is a flow chart showing an operation method of a battery management device according to an embodiment disclosed herein. According to an embodiment, Figure 6 The operations shown can be performed by Figure 2 The battery management device 100 is executed.

[0079] Reference Figure 6 , the operating method of the battery management device 100 according to the embodiment disclosed herein may include: an operation S110 of measuring the temperature and voltage of each of a plurality of battery cells; an operation S120 of generating first information of each of a plurality of battery cells based on whether the plurality of battery cells are being charged or discharged and based on a time-specific temperature of each of the plurality of battery cells and a time-specific voltage of each of the plurality of battery cells; and an operation S130 of determining a degraded battery cell among the plurality of battery cells based on the first information of each of the plurality of battery cells.

[0080] In operation S110, the measuring unit 110 may measure the temperature and voltage of each of the plurality of battery cells. For example, the measuring unit 110 may measure the temperature and voltage of each of the plurality of battery cells at specific time intervals. According to an embodiment, the measuring unit 110 may include a temperature sensor and a voltage sensor.

[0081] In operation S120, the controller 120 may generate first information for each of the plurality of battery cells based on whether the plurality of battery cells are being charged or discharged, and based on a time-specific temperature of each of the plurality of battery cells and a time-specific voltage of each of the plurality of battery cells. For example, the controller 120 may generate the first information in different ways depending on whether the plurality of battery cells are being charged or discharged.

[0082] In operation S130, the controller 120 may determine a degraded battery cell among the plurality of battery cells based on the first information of each of the plurality of battery cells. For example, the controller 120 may determine a degraded battery cell among the plurality of battery cells by comparing the first information of each of the plurality of battery cells.

[0083] According to an embodiment, the controller 120 may determine a battery cell, in which a change in the first information with respect to time is different from other battery cells by a preset value or more, as a degraded battery cell.

[0084] According to another embodiment, the controller 120 may determine a battery cell whose first information differs from other battery cells by a preset value or more as a degraded battery cell.

[0085] Figures 7 and 8 is a flowchart showing in detail the operation method of the battery management device according to the embodiment disclosed herein. According to the embodiment, Figure 7and Figure 8 The operations shown can be performed by Figure 2 The battery management device 100 is executed.

[0086] Reference Figure 7 , the operating method of the battery management device 100 according to the embodiment disclosed in this article may include: operation S210 of determining whether a plurality of battery cells are being charged or discharged; operation S220 of generating second information by subtracting an initial temperature from a time-specific temperature of each of the plurality of battery cells; operation S230 of generating third information by subtracting an initial voltage from a time-specific voltage of each of the plurality of battery cells; operation S240 of generating a difference between the second information and the third information as first information; operation S250 of generating second information by subtracting the initial temperature from the time-specific temperature of each of the plurality of battery cells; operation S260 of generating third information by subtracting the initial voltage from the time-specific voltage of each of the plurality of battery cells; and operation S270 of generating a difference between the second information and the third information as first information.

[0087] In operation S210, the controller 120 may determine whether the plurality of battery cells are being charged or discharged. For example, the controller 120 may identify the sign of the current flowing through the plurality of battery cells to determine whether the plurality of battery cells are being charged or discharged. According to an embodiment, the controller 120 may perform operation S220 when the plurality of battery cells are being charged, and perform operation S250 when the plurality of battery cells are being discharged.

[0088] In operation S220 , the controller 120 may subtract the initial temperature from the time-specific temperature of each of the plurality of battery cells to generate second information.

[0089] In operation S230 , the controller 120 may subtract the initial voltage from the time-specific voltage of each of the plurality of battery cells and negatively invert the result to generate third information.

[0090] In operation S240, the controller 120 may generate a difference between the second information and the third information as the first information.

[0091] According to an embodiment, this can be achieved by Figure 6 The operation S120 performs the operations S210 to S240.

[0092] In operation S250 , the controller 120 may subtract the initial temperature from the time-specific temperature of each of the plurality of battery cells to generate second information.

[0093] In operation S260 , the controller 120 may subtract the initial voltage from the time-specific voltage of each of the plurality of battery cells to generate third information.

[0094] In operation S270, the controller 120 may generate a difference between the second information and the third information as the first information.

[0095] According to an embodiment, this can be achieved by Figure 6 The operation S120 performs the operation S210 and the operations S250 to S270.

[0096] Reference Figure 8 According to the embodiment disclosed in this document, the operating method of the battery management device 100 may also include: an operation S310 of measuring the current flowing through the plurality of battery cells; and an operation S320 of determining that the plurality of battery cells are being charged when the current has a positive value and determining that the plurality of battery cells are being discharged when the current has a negative value.

[0097] In operation S310 , the measuring unit 110 may measure current flowing through a plurality of battery cells.

[0098] In operation S320 , the controller 120 may determine that the plurality of battery cells are being charged when the current has a positive value, and determine that the plurality of battery cells are being discharged when the current has a negative value.

[0099] Fig. 9 is a block diagram illustrating a hardware configuration of a computing system for executing an operating method of a battery management device according to an embodiment disclosed herein.

[0100] Reference Fig. 9 , a computing system 1000 according to an embodiment disclosed herein may include a microcontroller unit (MCU) 1010 , a memory 1020 , an input / output interface (I / F) 1030 , and a communication I / F 1040 .

[0101] The MCU 1010 may be a processor that executes various programs stored in the memory 1020 (e.g., a plurality of battery cell voltage information, current information, or temperature information collection program, a battery cell charge / discharge determination program, a plurality of battery cell first information generation program, a deteriorated battery cell determination program, etc.), processes various information (including voltage information of each of a plurality of battery cells, current information of each of a plurality of battery cells, temperature information of each of a plurality of battery cells, first information of each of a plurality of battery cells, whether the battery is deteriorated, etc.) through these programs, and executes the programs included in Figure 2 The functions of the controller in the above-mentioned battery management device are shown.

[0102] The memory 1020 may store various programs, such as a plurality of battery cell voltage information, current information, or temperature information collection program, a battery cell charge / discharge determination program, a plurality of battery cell first information generation program, a degraded battery cell determination program, etc. In addition, the memory 1020 may also store various information, such as voltage information of each of the plurality of battery cells, current information of each of the plurality of battery cells, temperature information of each of the plurality of battery cells, first information of each of the plurality of battery cells, whether the battery is degraded, etc.

[0103] The memory 1020 may be provided in plural form as needed. The memory 1020 may be a volatile memory or a nonvolatile memory. For the memory 1020 as a volatile memory, a random access memory (RAM), a dynamic RAM (DRAM), a static RAM (SRAM), etc. may be used. For the memory 1020 as a nonvolatile memory, a read-only memory (ROM), a programmable ROM (PROM), an electrically variable ROM (EAROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), a flash memory, etc. may be used. The above-listed examples of the memory 1020 are merely examples and are not limited thereto.

[0104] The input / output I / F 1030 may provide an interface for transmitting and receiving data by connecting an input device (not shown) such as a keyboard, a mouse, a touch panel, etc. and an output device such as a display (not shown) to the MCU 1010 .

[0105] The communication I / F 1040, which is a component capable of sending and receiving various data to and from a server, may be various devices capable of supporting wired communication or wireless communication. For example, the battery management device may send and receive the following information from a separately provided external server through the communication I / F 1040: for example, voltage information of each of a plurality of battery cells, current information of each of a plurality of battery cells, temperature information of each of a plurality of battery cells, first information of each of a plurality of battery cells, and whether the battery is deteriorated.

[0106] Therefore, the computer program according to the embodiment disclosed herein may be recorded in the memory 1020 and processed by the MCU 1010, thereby being implemented as an execution Figure 2 Modules with the indicated functionality.

[0107] The above description is merely an illustration of the technical concept of the present disclosure, and a person of ordinary skill in the art to which the embodiments disclosed herein pertain may make various modifications and changes without departing from the basic features of the embodiments of the present disclosure.

[0108] Therefore, the embodiments disclosed herein are intended to describe rather than limit the technical spirit of the embodiments disclosed herein, and the scope of the technical spirit of the present disclosure is not limited by these embodiments disclosed herein. The protection scope of the technical spirit disclosed herein should be interpreted by the attached claims, and all technical spirits within the same scope should be understood to be included in the scope of the present disclosure.

Claims

1. A battery management device, comprising: a measuring unit configured to measure a temperature and a voltage of each of the plurality of battery cells; as well as A controller, the controller being configured to: generating first information for each of the plurality of battery cells based on whether the plurality of battery cells are being charged or discharged, and based on a time-specific temperature of each of the plurality of battery cells and a time-specific voltage of each of the plurality of battery cells; and Based on the first information of each of the plurality of battery cells, a degraded battery cell among the plurality of battery cells is determined.

2. The battery management device according to claim 1, wherein: The controller is also configured to: When the plurality of battery cells are being charged, generating second information by subtracting an initial temperature from a time-specific temperature of each of the plurality of battery cells; generating third information by subtracting an initial voltage from a time-specific voltage of each of the plurality of battery cells and negatively inverting the result; as well as A difference between the second information and the third information is generated as the first information.

3. The battery management device according to claim 1, wherein: The controller is also configured to: When the plurality of battery cells are discharging, generating second information by subtracting an initial temperature from a time-specific temperature of each of the plurality of battery cells; generating third information by subtracting an initial voltage from a time-specific voltage of each of the plurality of battery cells; and A difference between the second information and the third information is generated as the first information.

4. The battery management device according to claim 1, wherein: The controller is further configured to determine a battery cell in which a time-specific change of the first information differs from other battery cells by a preset value or more as the degraded battery cell.

5. The battery management device according to claim 1, wherein: The controller is further configured to determine a battery cell whose first information differs from other battery cells by a preset value or more as the degraded battery cell.

6. The battery management device according to claim 1, wherein: The measuring unit is further configured to measure current flowing through the plurality of battery cells, and The controller is also configured to: When the current has a positive value, determining that the plurality of battery cells are being charged; as well as When the current has a negative value, it is determined that the plurality of battery cells are being discharged.

7. The battery management device according to claim 1, wherein: The controller is further configured to regenerate the first information based on a time of state change when the states of the plurality of battery cells are changed from charge to discharge or from discharge to charge.

8. The battery management device according to claim 1, wherein: The measuring unit includes a plurality of temperature sensors, and The number of temperature sensors corresponds to the number of battery cells.

9. An operating method of a battery management device, the operating method comprising: measuring a temperature and a voltage of each of the plurality of battery cells; generating first information for each of the plurality of battery cells based on whether the plurality of battery cells are being charged or discharged and based on a time-specific temperature of each of the plurality of battery cells and a time-specific voltage of each of the plurality of battery cells; as well as Based on the first information of each of the plurality of battery cells, a degraded battery cell among the plurality of battery cells is determined.

10. The operating method of the battery management device according to claim 9, wherein: Generating the first information of each of the plurality of battery cells based on whether the plurality of battery cells are being charged or discharged and based on a time-specific temperature of each of the plurality of battery cells and a time-specific voltage of each of the plurality of battery cells includes: determining whether the plurality of battery cells are being charged or discharged; generating second information by subtracting an initial temperature from a time-specific temperature of each of the plurality of battery cells while the plurality of battery cells are being charged; generating third information by subtracting an initial voltage from a time-specific voltage of each of the plurality of battery cells and negatively inverting the result; and A difference between the second information and the third information is generated as the first information.

11. The operating method of the battery management device according to claim 9, wherein: Generating the first information of each of the plurality of battery cells based on whether the plurality of battery cells are being charged or discharged and based on a time-specific temperature of each of the plurality of battery cells and a time-specific voltage of each of the plurality of battery cells includes: determining whether the plurality of battery cells are being charged or discharged; generating second information by subtracting an initial temperature from a time-specific temperature of each of the plurality of battery cells while the plurality of battery cells are being discharged; generating third information by subtracting an initial voltage from a time-specific voltage of each of the plurality of battery cells; and A difference between the second information and the third information is generated as the first information.

12. The operating method of the battery management device according to claim 9, further comprising: measuring current flowing through the plurality of battery cells; as well as When the current has a positive value, it is determined that the plurality of battery cells are being charged, and when the current has a negative value, it is determined that the plurality of battery cells are being discharged.

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