Battery management apparatus and operating method of the same

Abstract

A battery management device according to one embodiment disclosed in this document may include a measuring unit for measuring the current and voltage of a battery, and a controller for generating voltage estimation information by estimating the voltage of the battery during a second period after the first period based on first current information related to the current of the battery measured during the first period and first voltage information related to the voltage of the battery measured during the first period, and for determining the state of the battery based on the voltage estimation information and second voltage information related to the voltage of the battery measured during the second period.

Description

Technology Field

[0001] The embodiments disclosed in this document relate to a battery management device and a method of operating the same. Background Technology

[0002] Recently, active research and development on secondary batteries has been underway. Here, secondary batteries refer to rechargeable batteries, encompassing conventional Ni / Cd and Ni / MH batteries as well as the more recent lithium-ion batteries. Among secondary batteries, lithium-ion batteries have the advantage of significantly higher energy density compared to conventional Ni / Cd and Ni / MH batteries. Furthermore, lithium-ion batteries can be manufactured in a compact and lightweight manner, making them suitable for use as power sources for mobile devices. Recently, their scope of application has expanded to include electric vehicles, drawing attention as a next-generation energy storage medium.

[0003] Since defects in Energy Storage System (ESS) batteries can lead to major accidents such as fires, technology to detect battery defects is necessary. Although various technologies for detecting battery defects are developing, most rely on simple comparison methods, such as deviations in voltage, current, or temperature between battery cells or voltage drops in specific cells; therefore, there is a need for a method to detect battery defects more accurately. In other words, there is a need for technology to detect battery cells that exhibit abnormal behavior depending on the battery's condition. The problem to be solved

[0004] One objective of the embodiments disclosed in this document is to provide a battery management device capable of detecting unusual abnormal behavior that cannot be detected through deviations between battery cells, and a method of operating the same.

[0005] One objective of the embodiments disclosed in this document is to provide a battery management device capable of detecting abnormalities in a battery by estimating subsequent voltage information based on voltage information and current information over a certain period, and a method of operating the same.

[0006] The technical problems of the embodiments disclosed in this document are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0007] A battery management device according to one embodiment disclosed in this document may include a measuring unit for measuring the current and voltage of a battery, and a controller for generating voltage estimation information by estimating the voltage of the battery during a second period after the first period based on first current information related to the current of the battery measured during the first period and first voltage information related to the voltage of the battery measured during the first period, and for determining the state of the battery based on the voltage estimation information and second voltage information related to the voltage of the battery measured during the second period.

[0008] In one embodiment, the controller may determine that an abnormality has occurred in the battery if the difference between the voltage estimation information and the second voltage information is greater than or equal to a threshold value.

[0009] In one embodiment, the controller may generate voltage estimation information based on second current information related to the current of the battery measured during the second period and initial voltage information of the battery during the second period.

[0010] In one embodiment, the controller can learn the first current information and the first voltage information through a Long Short-Term Memory (LSTM) algorithm.

[0011] In one embodiment, the controller can generate the voltage estimation information based on the learned algorithm.

[0012] In one embodiment, the controller may update the algorithm based on the second voltage information and second current information related to the current of the battery measured during the second period.

[0013] In one embodiment, a storage unit is further included, and the storage unit can store an algorithm learned at each first period.

[0014] In one embodiment, the controller can generate voltage estimation information of the replaced battery during the second period based on the stored algorithm if the replaced battery exists.

[0015] In one embodiment, the controller can generate voltage estimation information for a battery having a State of Health (SOH) of a certain range.

[0016] In one embodiment, the controller may change the algorithm for generating the voltage estimation information when the SOH of the battery deviates from the predetermined range.

[0017] In one embodiment, the controller can update the algorithm that generates the voltage estimation information at each first period.

[0018] In one embodiment, the controller learns an algorithm related to the relationship between the first current information and the first voltage information, and can generate the voltage estimation information based on the learned algorithm.

[0019] A method of operation of a battery management device according to one embodiment disclosed in this document may include the steps of measuring the current and voltage of a battery; generating voltage estimation information by estimating the voltage of the battery during a second period after the first period based on first current information related to the current of the battery measured during the first period and first voltage information related to the voltage of the battery measured during the first period; and determining the state of the battery based on the voltage estimation information and second voltage information related to the voltage of the battery measured during the second period.

[0020] In one embodiment, the step of determining the state of the battery based on the voltage estimation information and the second voltage information related to the voltage of the battery measured during the second period may determine that an abnormality has occurred in the battery if the difference between the voltage estimation information and the second voltage information is greater than or equal to a threshold value.

[0021] In one embodiment, the step of generating voltage estimation information by estimating the voltage of the battery during a second period after the first period based on the first current information related to the current of the battery measured during the first period and the first voltage information related to the voltage of the battery measured during the first period may include the step of learning the first current information and the first voltage information through an algorithm and the step of generating the voltage estimation information based on the learned algorithm.

[0022] In one embodiment, the algorithm may further include a step of updating based on the second voltage information and second current information related to the current of the battery measured during the second period.

[0023] In one embodiment, the step of storing the algorithm at each first period may be further included.

[0024] In one embodiment, when the battery is replaced, the method may further include the step of generating voltage estimation information of the replaced battery during the second period based on the stored algorithm. Effects of the invention

[0025] A battery management device and a method of operation thereof according to one embodiment disclosed in this document can detect unusual abnormal behavior that cannot be detected through a simple comparison of voltage or current between battery cells.

[0026] A battery management device and its operation method according to one embodiment disclosed in this document can determine the state of a battery by estimating voltage information during a second period based on first current information and voltage information, and comparing the estimated voltage information with the measured voltage information.

[0027] A battery management device and its operation method according to one embodiment disclosed in this document can determine the state of a battery by learning an algorithm related to the relationship between current information and voltage information of a battery over a specific period.

[0028] A battery management device and a method of operation thereof according to one embodiment disclosed in this document can determine the state of a replaced battery by storing a learned algorithm and estimating voltage information for the replaced battery through a suitable algorithm even when the battery is replaced.

[0029] A battery management device and its operation method according to one embodiment disclosed in this document can estimate voltage information using the same algorithm for batteries with similar SOH, and can estimate voltage information of batteries by learning a new algorithm when the SOH changes over time.

[0030] In addition, various effects that can be identified directly or indirectly through this document may be provided. Brief explanation of the drawing

[0031] Figure 1 is a block diagram showing the configuration of a typical battery pack. FIG. 2 is a block diagram showing a battery management device according to one embodiment disclosed in this document. FIG. 3 is a drawing showing an example of a battery management device determining the state of a battery according to one embodiment disclosed in this document. FIG. 4 is a diagram showing an example of a battery management device storing an algorithm according to one embodiment disclosed in this document. FIG. 5 is a flowchart showing the operation method of a battery management device according to one embodiment disclosed in this document. FIGS. 6 and 7 are flowcharts specifically illustrating the operation method of a battery management device according to one embodiment disclosed in this document. FIG. 8 is a block diagram showing the hardware configuration of a computing system for performing a method of operation of a battery management device according to one embodiment disclosed in this document. Specific details for implementing the invention

[0032] The embodiments disclosed in this document are described in detail below with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments disclosed in this document, detailed descriptions of related known configurations or functions are omitted if it is determined that such detailed descriptions would hinder understanding of the embodiments disclosed in this document.

[0033] In describing the components of the embodiments disclosed in this document, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended only to distinguish the components from other components and do not limit the essence, order, or sequence of the components. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the embodiments disclosed in this document belong. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0034] Figure 1 is a block diagram showing the configuration of a typical battery pack.

[0035] Referring to FIG. 1, a battery control system including a battery pack (1) and a higher controller (2) included in a higher system according to one embodiment of the present invention is schematically shown.

[0036] As illustrated in FIG. 1, the battery pack (1) comprises a battery module (10) capable of charging and discharging and composed of one or more battery cells, a switching unit (14) connected in series to the (+) terminal side or the (-) terminal side of the battery module (10) to control the charging and discharging current flow of the battery module (10), and a battery management system (20) that monitors the voltage, current, temperature, etc. of the battery pack (1) to control and manage it to prevent overcharging and over-discharging. At this time, the battery pack (1) may be equipped with a plurality of battery modules (10), sensors (12), switching units (14), and battery management systems (20).

[0037] Here, the switching unit (14) is a device for controlling the current flow for charging or discharging a plurality of battery modules (10), and, for example, depending on the specifications of the battery pack (1), at least one relay, magnetic contactor, etc. may be used.

[0038] The battery management system (20) is an interface that receives values ​​of various parameters measured above, and may include a plurality of terminals and a circuit connected to these terminals to perform processing of the received values. Additionally, the battery management system (20) may control the ON / OFF of a switching unit (14), such as a relay or contactor, and may be connected to a battery module (10) to monitor the status of each battery module (10). According to an embodiment, the battery management system (20) may include the battery management device (100) of FIG. 2. According to another embodiment, the battery management system (20) may be a different system from the battery management device (100) of FIG. 2. That is, the battery management device (100) of FIG. 2 may be included in the battery pack (1) or may be composed of another device outside the battery pack (1).

[0039] The upper controller (2) can transmit a control signal for the battery module (10) to the battery management system (20). Accordingly, the operation of the battery management system (20) can be controlled based on the signal applied from the upper controller (2).

[0040] FIG. 2 is a block diagram showing a battery management device according to one embodiment disclosed in this document.

[0041] Referring to FIG. 2, a battery management device (100) according to one embodiment disclosed in this document may include a measuring unit (110), a controller (120), and a controller (120). Depending on the embodiment, the battery management device (100) may be included in the battery management system (20) of FIG. 1, or it may be a different device from the battery management system (20) of FIG. 1. Depending on the embodiment, the battery management device (100) may further include a storage unit (130).

[0042] The measuring unit (110) can measure the current and voltage of the battery. For example, the measuring unit (110) can measure first current information related to the current of the battery measured during a first period and first voltage information related to the voltage of the battery measured during a first period. As another example, the measuring unit (110) may include a current sensor and a voltage sensor, and can measure the first current information and the first voltage information through the current sensor and the voltage sensor. As another example, the measuring unit (110) can measure the current information and voltage information of each of the battery pack, battery module, or battery cell included in the battery. According to an embodiment, the first period may be one month, but is not limited thereto. According to another embodiment, the first period may be a period during which the SOH of the battery does not change.

[0043] According to the embodiment, the measuring unit (110) can measure the first current information and the first voltage information at each first period. For example, if the first period is one month, the measuring unit (110) can measure the current information and the voltage information of the battery during the first month, and then measure the current information and the voltage information of the battery again during the next month. That is, the measuring unit (110) can repeatedly measure the first current information and the first voltage information.

[0044] The measuring unit (110) can measure second current information related to the current of the battery during the second period after the first period and second voltage information related to the voltage of the battery during the second period. For example, the second period may be one day, but is not limited thereto. As another example, the second period may be the period during which the battery voltage information is estimated by the controller (120) described later.

[0045] According to the embodiment, the measuring unit (110) can measure second current information and second voltage information at each second period. For example, if the second period is one day, the measuring unit (110) can measure second current information and second voltage information during the first day, and can also measure second current information and second voltage information again on the next day. That is, the measuring unit (110) can repeatedly measure second current information and second voltage information.

[0046] The controller (120) can generate voltage estimation information by estimating the voltage of the battery during the second period after the first period based on the first current information and the first voltage information.

[0047] The controller (120) can determine the state of the battery based on estimated voltage information and second voltage information related to the voltage of the battery measured during a second period. For example, the controller (120) can compare the generated voltage estimation information and the second voltage information, and can determine that a problem has occurred in the battery if the difference between the voltage estimation information and the second voltage information is greater than or equal to a threshold value. According to an embodiment, the controller (120) can determine that a problem has occurred in the battery based on at least one of the average of the difference between the voltage estimation information and the second voltage information, the difference accumulated during the second period, the absolute value of the difference, and the root mean square of the difference, but is not limited to the method described above.

[0048] FIG. 3 is a drawing showing an example of a battery management device determining the state of a battery according to one embodiment disclosed in this document. According to the embodiment, the example shown in FIG. 3 can be performed through the battery management device (100) of FIG. 2.

[0049] Referring to FIG. 3, the measuring unit (110) can measure first current information and first voltage information (210). For example, the first period may be from day 1 to day N, and the measuring unit (110) can measure the current of the battery from day 1 to day N and the voltage of the battery from day 1 to day N.

[0050] Additionally, the measuring unit (110) can measure the second current information and the initial voltage information (230) of the second period, and can measure the second voltage information (250). For example, the second period may be day N+1, and the measuring unit (110) can measure the current information of day N+1 and the voltage information of day N+1.

[0051] The controller (120) can generate voltage estimation information (240) based on the second current information and the initial voltage information (230) of the second period. For example, the controller (120) can estimate the voltage information of day N+1 based on the current information of day N+1 and the initial voltage information of day N+1.

[0052] According to an embodiment, the controller (120) can learn (220) the first current information and the first voltage information (210) through a Long Short-Term Memory (LSTM) algorithm. For example, the controller (120) can learn (220) an algorithm related to the relationship between the first current information and the first voltage information (210).

[0053] The controller (120) can generate voltage estimation information (240) based on a learned algorithm. For example, the controller (120) can input current information for day N+1 and an initial voltage (230) for day N+1 into the learned algorithm, and can generate and output voltage information (240) for day N+1 estimated based on the algorithm.

[0054] According to an embodiment, the controller (120) can update an algorithm based on second current information and second voltage information. For example, the controller (120) can learn an algorithm related to the relationship between the battery voltage information and the battery current information by additionally considering second current information and second voltage information in addition to first current information and first voltage information.

[0055] According to an embodiment, the controller (120) can update the algorithm based on current information of the battery measured at each second period and voltage information of the battery measured at each second period. For example, the controller (120) can learn and update the algorithm based on current information of the battery from day 1 to day N+1 and voltage information of the battery from day 1 to day N+1. As another example, the controller (120) can update the algorithm based on current information of the battery on day N+1 and voltage information of the battery on day N+1. According to an embodiment, the controller (120) can generate voltage estimation information of the battery on day N+2 by estimating the voltage information of the battery on day N+2 based on the updated algorithm.

[0056] The controller (120) can determine the state of the battery based on the generated voltage estimation information (240) and the second voltage information (250). For example, the controller (120) can determine the state of the battery by comparing the voltage estimation information (240) and the second voltage information (250). As another example, the controller (120) can determine that a problem has occurred in the battery if the difference between the voltage estimation information (240) and the second voltage information (250) is greater than or equal to a threshold value.

[0057] Referring again to FIG. 2, the controller (120) can generate voltage estimation information for a battery having a State of Health (SOH) within a certain range. For example, since the relationship between the battery's current information and the battery's voltage information may change when the SOH deviates from the certain range, the controller (120) can generate voltage estimation information for a battery having a certain range of SOH through the same algorithm.

[0058] According to an embodiment, when the SOH of the battery falls outside a certain range, the controller (120) may change the algorithm for generating voltage estimation information. For example, the controller (120) may change the algorithm at first intervals.

[0059] According to an embodiment, the battery management device (100) may further include a storage unit (130). The storage unit (130) may store an algorithm learned at each first period.

[0060] FIG. 4 is a diagram showing an example of a battery management device storing an algorithm according to one embodiment disclosed in this document.

[0061] Referring to FIG. 4, a storage unit (130) according to one embodiment disclosed in this document can store algorithms learned at each first period. Accordingly, the storage unit (130) can store a plurality of algorithms (141, 142).

[0062] According to the embodiment, the first algorithm (131) stored in the storage unit (130) may be an algorithm learned by the controller (120) during the first period. Additionally, the second algorithm (132) stored in the storage unit (130) may be an algorithm learned by the controller (120) during the second period. That is, the controller (120) may learn an algorithm related to the relationship between the battery's current information and the battery's voltage information during each first period, and may store the learned algorithm in the storage unit (130).

[0063] According to an embodiment, the controller (120) can generate voltage estimation information every second period after the first period based on the first algorithm (131). Additionally, the controller (120) can learn the second algorithm (132) based on the second first current information and the second first voltage information by accumulating the battery current information and the battery voltage information measured every second period. In this case, the controller (120) can generate voltage estimation information every second period after the second first period based on the second algorithm (132).

[0064] According to an embodiment, the controller (120) can generate voltage estimation information based on an algorithm corresponding to each battery. For example, if a replaced battery exists, the controller (120) can generate voltage estimation information for the replaced battery during a second period based on an algorithm stored in the storage unit (130). Since the SOH, which indicates the degree of degradation when a battery is replaced, may differ from that of the batteries that are not replaced, the controller (120) can generate voltage estimation information for the replaced battery based on an algorithm corresponding to the period in which the replaced battery is included.

[0065] A battery management device (100) according to one embodiment disclosed in this document can detect unusual abnormal behavior that cannot be detected through a simple comparison of voltage or current between battery cells.

[0066] A battery management device (100) according to one embodiment disclosed in this document can determine the state of a battery by estimating voltage information during a second period based on first current information and voltage information and comparing the estimated voltage information with the measured voltage information.

[0067] A battery management device (100) according to one embodiment disclosed in this document can determine the state of a battery by learning an algorithm related to the relationship between current information and voltage information of a battery during a specific period.

[0068] A battery management device (100) according to one embodiment disclosed in this document stores a learned algorithm and can determine the state of a replaced battery by estimating voltage information through a suitable algorithm for the replaced battery even when the battery is replaced.

[0069] A battery management device (100) according to one embodiment disclosed in this document can estimate voltage information using the same algorithm for batteries with similar SOH, and can estimate voltage information of batteries by learning a new algorithm when the SOH changes over time.

[0070] FIG. 5 is a flowchart showing the operation method of a battery management device according to one embodiment disclosed in this document.

[0071] According to the embodiment, the operations illustrated in FIG. 5 can be performed through the battery management device (100) of FIG. 2.

[0072] Referring to FIG. 5, the method of operation of a battery management device (100) according to one embodiment disclosed in this document may include the step of measuring the current and voltage of a battery (S110), the step of generating voltage estimation information by estimating the voltage of a battery during a second period after the first period based on first current information related to the current of the battery measured during the first period and first voltage information related to the voltage of the battery measured during the first period (S120), and the step of determining the state of the battery based on the voltage estimation information and second voltage information related to the voltage of the battery measured during the second period (S130).

[0073] In step S110, the measuring unit (110) can measure the current and voltage of the battery. For example, the measuring unit (110) can measure first current information related to the current of the battery measured during a first period and first voltage information related to the voltage of the battery measured during a first period. As another example, the measuring unit (110) may include a current sensor and a voltage sensor, and can measure the first current information and the first voltage information through the current sensor and the voltage sensor. As another example, the measuring unit (110) can measure the current information and voltage information of each of the battery pack, battery module, or battery cell included in the battery. According to an embodiment, the first period may be one month, but is not limited thereto. According to another embodiment, the first period may be a period during which the SOH of the battery does not change.

[0074] According to the embodiment, in step S110, the measuring unit (110) can measure the first current information and the first voltage information at each first period. For example, if the first period is one month, the measuring unit (110) can measure the current information and the voltage information of the battery during the first month, and then measure the current information and the voltage information of the battery again during the next month. That is, the measuring unit (110) can repeatedly measure the first current information and the first voltage information.

[0075] In step S110, the measuring unit (110) may measure second current information related to the current of the battery during the second period following the first period, and second voltage information related to the voltage of the battery during the second period. For example, the second period may be one day, but is not limited thereto. As another example, the second period may be the period during which the battery voltage information is estimated by the controller (120) described later.

[0076] According to the embodiment, in step S110, the measuring unit (110) can measure the second current information and the second voltage information at each second period. For example, if the second period is one day, the measuring unit (110) can measure the second current information and the second voltage information during the first day, and can also measure the second current information and the second voltage information again on the next day. That is, the measuring unit (110) can repeatedly measure the second current information and the second voltage information.

[0077] In step S120, the controller (120) can generate voltage estimation information based on first current information related to the current of the battery measured during the first period and first voltage information related to the voltage of the battery measured during the first period. For example, the controller (120) can learn an algorithm related to the relationship between the first current information and the first voltage information, and can generate voltage estimation information based on the learned algorithm, second current information related to the current of the battery measured during the second period, and initial voltage information of the second period.

[0078] In step S130, the controller (120) can determine the state of the battery based on voltage estimation information and second voltage information. For example, the controller (120) can determine that a problem has occurred in the battery if the difference between the voltage estimation information and the second voltage information related to the voltage of the battery measured during the second period is greater than or equal to a threshold value.

[0079] FIGS. 6 and 7 are flowcharts specifically illustrating a method of operation of a battery management device according to an embodiment disclosed in this document. According to the embodiment, the operations illustrated in FIGS. 6 and 7 can be performed through the battery management device (100) of FIG. 2.

[0080] Referring to FIG. 6, the operation method of a battery management device (100) according to one embodiment disclosed in this document may include a step (S210) of learning first current information and first voltage information through an algorithm and a step (S220) of generating voltage estimation information based on the learned algorithm. According to the embodiment, steps S210 and S220 may be included in step S120 of FIG. 5.

[0081] In step S210, the controller (120) can learn the first current information and the first voltage information through an algorithm. For example, the controller (120) can learn the first current information and the first voltage information through a Long Short-Term Memory (LSTM) algorithm. As another example, the controller (120) can learn an algorithm related to the relationship between the first current information and the first voltage information.

[0082] In step S220, the controller (120) can generate voltage estimation information based on a learned algorithm.

[0083] Referring to FIG. 7, the method of operation of a battery management device (100) according to one embodiment disclosed in this document may include a step (S310) of updating an algorithm based on second voltage information and second current information related to the current of the battery measured during a second period, a step (S320) of storing an algorithm for each first period, and a step (S330) of predicting voltage information of the replaced battery during the second period based on the stored algorithm when the battery is replaced.

[0084] In step S310, the controller (120) can update the algorithm based on second voltage information and second current information related to the current of the battery measured during the second period. For example, the controller (120) can learn an algorithm related to the relationship between voltage information and current information by further considering second current information and second voltage information in addition to first current information and first voltage information. According to an embodiment, the controller (120) can update the algorithm based on current information of the battery measured at each second period and voltage information of the battery measured at each second period.

[0085] In step S320, the storage unit (130) can store algorithms at first intervals. For example, the storage unit (130) can store multiple algorithms by storing algorithms at first intervals.

[0086] In step S330, the controller (120) can generate voltage estimation information of the replaced battery for a second period based on a stored algorithm when the battery is replaced. For example, if the replaced battery exists, the controller (120) can generate voltage estimation information of the replaced battery for a second period based on an algorithm stored in the storage unit (130). Since the SOH, which indicates the degree of degradation when the battery is replaced, may differ from that of the batteries that are not replaced, the controller (120) can generate voltage estimation information of the replaced battery based on an algorithm corresponding to the period in which the replaced battery is included.

[0087] FIG. 8 is a block diagram showing the hardware configuration of a computing system for performing a method of operation of a battery management device according to one embodiment disclosed in this document.

[0088] Referring to FIG. 8, a computing system (1000) according to one embodiment disclosed in this document may include an MCU (1010), a memory (1020), an input / output I / F (1030), and a communication I / F (1040).

[0089] The MCU (1010) may be a processor that executes various programs stored in memory (1020) (e.g., a battery voltage information or current information collection program, an algorithm learning program related to the relationship between battery voltage information and battery current information, a battery voltage information estimation program, a battery replacement check program, a battery status determination program, etc.), processes various information including battery voltage information, battery current information, battery voltage information estimation algorithm, battery status information, etc. through these programs, and performs the functions of a controller included in the battery management device shown in FIG. 2 above.

[0090] The memory (1020) can store various programs, such as a battery voltage information or current information collection program, an algorithm learning program related to the relationship between battery voltage information and battery current information, a battery voltage information estimation program, a battery replacement check program, and a battery status determination program. Additionally, the memory (1020) can store various information, such as battery voltage information, battery current information, a battery voltage information estimation algorithm, and battery status information. According to an embodiment, the memory (1020) may be substantially the same as the storage unit (130) of FIG. 2.

[0091] These memories (1020) may be provided in multiple quantities as needed. The memories (1020) may be volatile memories or non-volatile memories. As volatile memories, the memory (1020) may use RAM, DRAM, SRAM, etc. As non-volatile memories, the memory (1020) may use ROM, PROM, EAROM, EPROM, EEPROM, flash memory, etc. The examples of the memories (1020) listed above are merely examples and are not limited to these examples.

[0092] The input / output I / F (1030) can provide an interface that enables data transmission and reception between an input device (not shown), such as a keyboard, mouse, or touch panel, an output device (not shown), and an MCU (1010).

[0093] The communication I / F (1040) is configured to transmit and receive various data with a server and may be various devices capable of supporting wired or wireless communication. For example, the battery management device can transmit and receive information such as various battery voltage information, battery current information, battery voltage information estimation algorithms, and battery status information from a separately provided external server via the communication I / F (1040).

[0094] In this way, a computer program according to one embodiment disclosed in this document may be implemented as a module that performs, for example, the functions illustrated in FIG. 2, by being written to memory (1020) and processed by an MCU (1010).

[0095] The above description is merely an illustrative explanation of the technical concept disclosed in this document, and a person skilled in the art to which the embodiments disclosed in this document belong may make various modifications and variations within the scope of the essential characteristics of the embodiments disclosed in this document.

[0096] Accordingly, the embodiments disclosed in this document are intended to illustrate, not limit, the technical concept disclosed in this document, and the scope of the technical concept disclosed in this document is not limited by these embodiments. The scope of protection of the technical concept disclosed in this document shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of this document. Explanation of the symbols

[0097] 1: Battery pack 2: Higher-level controller 10: Multiple battery modules 12: Sensor 14: Switching section 20: Battery Management System 100: Battery Management Unit 110: Measurement section 120: Controller 130: Storage section 131: The First Algorithm 132: The Second Algorithm 1000: Computing System 1010: MCU 1020: Memory 1030: Input / Output I / F 1040: Communication I / F

Claims

Claim 1 A battery management device comprising: a measuring unit for measuring the current and voltage of a battery; and a controller for generating voltage estimation information by estimating the voltage of the battery during a second period after the first period based on first current information related to the current of the battery measured during the first period and first voltage information related to the voltage of the battery measured during the first period, and determining the state of the battery based on the voltage estimation information and second voltage information related to the voltage of the battery measured during the second period; wherein the controller learns an algorithm for generating the voltage estimation information for each first period, generates the voltage estimation information through the same algorithm for a battery having a State of Health (SOH) within a certain range, and, when the SOH of the battery deviates from the certain range, changes the algorithm for generating the voltage estimation information among a plurality of algorithms learned for each first period. Claim 2 A battery management device according to claim 1, wherein the controller determines that an abnormality has occurred in the battery if the difference between the voltage estimation information and the second voltage information is greater than or equal to a threshold value. Claim 3 A battery management device according to claim 1, wherein the controller generates voltage estimation information based on second current information related to the current of the battery measured during the second period and initial voltage information of the battery during the second period. Claim 4 A battery management device according to claim 1, wherein the controller learns the first current information and the first voltage information through a Long Short-Term Memory (LSTM) algorithm. Claim 5 In claim 4, the controller is a battery management device that generates voltage estimation information based on the learned algorithm. Claim 6 In claim 4, the battery management device, wherein the controller updates the algorithm based on the second voltage information and second current information related to the current of the battery measured during the second period. Claim 7 A battery management device according to claim 4, further comprising a storage unit, wherein the storage unit stores the learned algorithm at each first period. Claim 8 In claim 7, the battery management device wherein the controller generates voltage estimation information of the replaced battery during the second period based on the stored algorithm if the replaced battery exists. Claim 9 delete Claim 10 delete Claim 11 delete Claim 12 A battery management device according to claim 1, wherein the controller learns the algorithm related to the relationship between the first current information and the first voltage information, and generates the voltage estimation information based on the learned algorithm. Claim 13 The method comprises: a step of measuring the current and voltage of a battery; a step of generating voltage estimation information by estimating the voltage of the battery during a second period after the first period based on first current information related to the current of the battery measured during the first period and first voltage information related to the voltage of the battery measured during the first period; and a step of determining the state of the battery based on the voltage estimation information and second voltage information related to the voltage of the battery measured during the second period; wherein the step of generating voltage estimation information by estimating the voltage of the battery during the second period after the first period based on first current information related to the current of the battery measured during the first period and first voltage information related to the voltage of the battery measured during the first period comprises: a step of learning an algorithm for generating the voltage estimation information for each first period; and a step of generating the voltage estimation information through the same algorithm for a battery having a State of Health (SOH) within a certain range. A method of operation of a battery management device comprising: a step of changing the algorithm for generating voltage estimation information among a plurality of algorithms learned at each first period when the SOH of the battery deviates from the predetermined range. Claim 14 In claim 13, the step of determining the state of the battery based on the voltage estimation information and the second voltage information related to the voltage of the battery measured during the second period is a method of operation of a battery management device, wherein if the difference between the voltage estimation information and the second voltage information is greater than or equal to a threshold value, it is determined that an abnormality has occurred in the battery. Claim 15 A method of operation of a battery management device according to claim 13, wherein the step of generating voltage estimation information by estimating the voltage of the battery during a second period after the first period based on the first current information related to the current of the battery measured during the first period and the first voltage information related to the voltage of the battery measured during the first period comprises: the step of learning the first current information and the first voltage information through the algorithm; and the step of generating the voltage estimation information based on the learned algorithm. Claim 16 A method of operation of a battery management device, further comprising the step of updating the algorithm based on the second voltage information and second current information related to the current of the battery measured during the second period in claim 15. Claim 17 A method of operation of a battery management device according to claim 15, further comprising the step of storing the learned algorithm at each of the first periods. Claim 18 A method of operation of a battery management device according to claim 17, further comprising the step of generating voltage estimation information of the replaced battery during the second period based on the stored algorithm when the battery is replaced.

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