Battery management apparatus and operation method therefor

Abstract

A battery management apparatus according to an embodiment disclosed in the present document may comprise: an acquisition unit for acquiring a voltage of a battery cell; and a controller for, on the basis of the voltage of the battery cell, obtaining a battery profile related to the voltage and a capacity of the battery cell, identifying degradation states of a positive electrode and a negative electrode of the battery cell by using the battery profile, and on the basis of the degradation states of the positive electrode and the negative electrode, managing a charging profile used for charging of the battery cell.

Description

Battery management device and its operating method

[0001] Cross-citation with related applications

[0002] This invention claims the benefit of priority from Korean Patent Application No. 10-2023-0132823, filed October 5, 2023, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] The embodiments disclosed in this document relate to a battery management device and a method of operating the same.

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

[0006] Electric vehicles receive external electricity to charge battery cells, which are then discharged to drive the motor and generate power. Battery cells undergo internal deformation and transformation through various charging and discharging cycles during production and use, altering their physical and chemical properties. For example, internal short circuits, external short circuits, venting due to lithium deposition, or undervoltage failures (where the battery cell voltage drops below a certain level) can occur. These battery degradation and deterioration necessitate technologies to manage battery cell charging behavior.

[0007] One object of the embodiments disclosed in this document is to provide a battery management device and an operating method thereof that manage a charge profile of a battery cell based on a deterioration state of a positive electrode and a deterioration state of a negative electrode of the battery cell.

[0008] One object of the embodiments disclosed in this document is to provide a battery management device and an operating method thereof that improve a rapid charging profile for preventing degradation of a battery cell based on a degradation state of a positive electrode and a degradation state of a negative electrode of a battery cell.

[0009] The technical problems of the embodiments disclosed in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the descriptions below.

[0010] A battery management device according to an embodiment disclosed in this document may include: an acquisition unit for acquiring a voltage of a battery cell; and a controller for calculating a capacity of the battery cell and a battery profile related to the voltage based on the voltage of the battery cell, using the battery profile to determine a deterioration state of a positive electrode and a negative electrode of the battery cell, and managing a charging profile used for charging the battery cell based on the deterioration state of the positive electrode and the negative electrode.

[0011] According to an embodiment, the controller can calculate a degree of deterioration of the positive electrode of the battery cell based on the battery profile, which is a degree of deterioration of the positive electrode, and a degree of deterioration of the negative electrode of the battery cell based on the degree of deterioration of the positive electrode and the degree of deterioration of the negative electrode, and can confirm the deterioration states of the positive electrode and the negative electrode based on the degree of deterioration of the positive electrode and the degree of deterioration of the negative electrode.

[0012] According to an embodiment, the controller may separate the positive electrode profile and the negative electrode profile from the battery profile, and calculate the positive electrode degradation degree and the negative electrode degradation degree based on the degree to which the capacity of the positive electrode profile and the negative electrode profile is reduced compared to the capacity of the reference positive electrode profile and the reference negative electrode profile.

[0013] According to an embodiment, the controller can determine a primary degradation state that has a greater influence on degradation of the battery cell among the degradation states of the positive electrode and the negative electrode of the battery cell, and manage the charging profile based on the primary degradation state.

[0014] According to an embodiment, the controller can determine the degeneration state of an electrode having a greater degeneration degree among the anode degeneration degree and the cathode degeneration degree as the main degeneration state.

[0015] According to an embodiment, the controller can manage a charging profile used for charging the battery cell based on a first charging profile associated with the battery cell when the primary degradation state is a positive degradation state.

[0016] According to an embodiment, the first charging profile may be a charging profile related to a Beginning of Life (BoL) state of the battery cell.

[0017] According to an embodiment, the controller can manage a charging profile used for charging the battery cell based on a second charging profile that is a charging profile reflecting the deterioration state of the negative electrode when the primary deterioration state is a deterioration state of the negative electrode.

[0018] According to an embodiment, the controller may calculate the second charging profile by reducing the charging current of the first charging profile by the degree of negative electrode degradation based on a first charging profile indicating a charging current corresponding to a capacity of the battery cell related to a Beginning of Life (BoL) state of the battery cell.

[0019] According to an embodiment, the controller may calculate the second charging profile by reducing the capacity of the first charging profile by the negative electrode degradation degree based on the first charging profile indicating a charging current corresponding to the capacity of the battery cell related to the Beginning of Life (BoL) state of the battery cell.

[0020] According to an embodiment, the charging profile may be a profile indicating a correspondence between the capacity of the battery cell and the charging current for rapid charging of the battery cell.

[0021] A battery management method according to one embodiment disclosed in the present document may include a step of calculating a capacity of a battery cell based on a voltage of the battery cell and a battery profile related to the voltage; a step of checking a deterioration state of a positive electrode and a negative electrode of the battery cell using the battery profile; and a step of managing a charging profile used for charging the battery cell based on the deterioration state of the positive electrode and the negative electrode.

[0022] According to an embodiment, the step of checking the degradation state of the positive and negative electrodes of the battery cell may include the step of calculating a positive electrode degradation degree, which is a degree to which the positive electrode of the battery cell is degraded, and a negative electrode degradation degree, which is a degree to which the negative electrode of the battery cell is degraded, based on the battery profile; and the step of checking the degradation state of the positive and negative electrodes based on the positive electrode degradation degree and the negative electrode degradation degree.

[0023] According to an embodiment, the step of calculating the anode degradation degree and the cathode degradation degree may include the step of separating the anode profile and the cathode profile from the battery profile; and the step of calculating the anode degradation degree and the cathode degradation degree based on the degree to which the capacity of the anode profile and the cathode profile is reduced compared to the capacity of the reference anode profile and the reference cathode profile.

[0024] According to an embodiment, the step of managing the charging profile may include the step of determining a primary degradation state that has a greater influence on the degradation of the battery cell among the degradation states of the positive electrode and the negative electrode of the battery cell; and the step of managing the charging profile based on the primary degradation state.

[0025] According to an embodiment, the step of determining the primary degradation state may include a step of determining a degradation state of an electrode having a greater degree of degradation among the anode degradation degree and the cathode degradation degree as the primary degradation state.

[0026] According to an embodiment, the step of managing the charging profile may include managing a charging profile used for charging the battery cell based on a first charging profile associated with the battery cell when the primary degradation state is a deterioration state of the positive electrode.

[0027] According to an embodiment, the step of managing the charging profile may include managing a charging profile used for charging the battery cell based on a second charging profile that is a charging profile reflecting the deterioration state of the negative electrode, when the primary deterioration state is a deterioration state of the negative electrode.

[0028] According to an embodiment, the method may include a step of calculating the second charging profile by reducing the charging current of the first charging profile by the degree of negative electrode degradation based on a first charging profile indicating a charging current corresponding to a capacity of the battery cell related to a Beginning of Life (BoL) state of the battery cell.

[0029] According to an embodiment, the method may include a step of calculating the second charging profile by reducing the capacity of the first charging profile by the negative electrode degradation degree based on a first charging profile indicating a charging current corresponding to a capacity of the battery cell related to a Beginning of Life (BoL) state of the battery cell.

[0030] The battery management device and its operating method according to the embodiment disclosed in this document can manage the charging profile of a battery cell based on the deterioration state of the positive electrode and the deterioration state of the negative electrode of the battery cell.

[0031] The battery management device and its operating method according to the embodiment disclosed in this document can improve a rapid charging profile for preventing degradation of a battery cell based on the degradation state of the positive electrode and the degradation state of the negative electrode of the battery cell.

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

[0033] FIG. 1 is a drawing showing a battery cell pack according to one embodiment disclosed in this document.

[0034] FIG. 2 is a block diagram showing a battery management device according to one embodiment disclosed in this document.

[0035] FIG. 3 is a diagram illustrating a battery profile according to one embodiment disclosed in this document.

[0036] FIG. 4 is a diagram illustrating a battery profile according to one embodiment disclosed in this document.

[0037] FIG. 5 is a diagram illustrating a battery profile according to one embodiment disclosed in this document.

[0038] FIG. 6 is a diagram illustrating a battery profile according to one embodiment disclosed in this document.

[0039] FIG. 7 is a diagram illustrating a charging profile according to one embodiment disclosed in this document.

[0040] FIGS. 8 and 9 are diagrams illustrating a charging profile according to one embodiment disclosed in this document.

[0041] FIG. 10 is an operation flowchart of a battery management device according to one embodiment disclosed in this document.

[0042] FIG. 11 is an operation flowchart of a battery management device according to one embodiment disclosed in this document.

[0043] FIG. 12 is a block diagram showing the hardware configuration of a computing system for performing an operating method of a battery management device according to one embodiment disclosed in this document.

[0044] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that the present invention encompasses various modifications, equivalents, and / or alternatives of the embodiments.

[0045] The various embodiments and terminology used in this document are not intended to limit the technical features described in this document to specific embodiments, but should be understood to encompass various modifications, equivalents, or alternatives of the embodiments. In connection with the description of the drawings, similar reference numerals may be used to refer to similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise.

[0046] In this document, the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can each include any one of the items listed together in that phrase, or all possible combinations thereof. Terms such as "first", "second", "first", "second", "A", "B", "(a)", or "(b)" may be used merely to distinguish the corresponding element from other corresponding elements, and do not limit the corresponding elements in any other respect (e.g., importance or order) unless specifically stated otherwise.

[0047] In this document, whenever a component (e.g., a first component) is referred to as being “connected,” “coupled,” or “connected,” with or without the terms “functionally” or “communicatively,” or “coupled” or “connected,” it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or via a third component.

[0048] According to one embodiment, the method according to various embodiments disclosed in this document may be provided as a computer program product. The computer program product may be traded as a commodity between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) through an application store or directly between two user devices. In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0049] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0050] FIG. 1 is a drawing showing a battery cell pack according to one embodiment disclosed in this document.

[0051] Referring to FIG. 1, a battery cell pack (1000) according to one embodiment disclosed in the present document may include a battery cell module (100), a battery management device (200), and a relay (300). According to various embodiments, the battery cell module (100) may be a battery cell, and in this case, the battery cell pack (1000) may have a cell-to-pack structure.

[0052] In FIG. 1, a single battery cell module (100) is illustrated, but depending on the embodiment, a plurality of battery cell modules (100) may be configured, and a battery cell pack (1000) may have a stacked structure of a plurality of battery cell modules.

[0053] The battery cell module (100) may include a plurality of battery cells (110, 120, 130, 140). In FIG. 1, the number of battery cells is illustrated as four, but this is not limited thereto, and the battery cell module (100) may include n battery cells (n is a natural number greater than or equal to 2).

[0054] The battery cell module (100) can supply power to a target device (not shown). For this purpose, the battery cell module (100) can be electrically connected to the target device. Here, the target device can include an electrical, electronic, or mechanical device that operates by receiving power from a battery cell pack (1000) including a plurality of battery cells (110, 120, 130, 140). For example, the target device can be, but is not limited to, an electric vehicle (EV) or an energy storage system (ESS).

[0055] A plurality of battery cells (110, 120, 130, 140) are basic units of battery cells that can be used by charging and discharging electric energy, and may be, but are not limited to, lithium-ion (Li-ion) batteries, lithium-ion polymer (Li-ion polymer) batteries, nickel-cadmium (Ni-Cd) batteries, nickel-metal hydride (Ni-MH) batteries, etc. Meanwhile, in FIG. 1, a single battery cell module (100) is illustrated, but depending on the embodiment, the battery cell module (100) may be configured in multiple units.

[0056] The battery management device (200) can manage and / or control the state and / or operation of the battery cell module (100). For example, the battery management device (200) can manage and / or control the state and / or operation of a plurality of battery cells (110, 120, 130, 140) included in the battery cell module (100). The battery management device (200) can manage charging and / or discharging of the battery cell module (100).

[0057] The battery management device (200) can control the operation of the relay (300). For example, the battery management device (200) can short-circuit the relay (300) to supply power to a target device. Additionally, the battery management device (200) can short-circuit the relay (300) when a charging device is connected to the battery cell pack (1000).

[0058] In addition, the battery management device (200) can monitor the voltage, current, temperature, etc. of the battery cell module (100) and / or each of the plurality of battery cells (110, 120, 130, 140) included in the battery cell module (100). In addition, for monitoring by the battery management device (200), sensors or various measurement modules not shown may be additionally installed at any location of the battery cell module (100), the charge / discharge path, or the battery cell module (100). The battery management device (200) can calculate parameters indicating the state of the battery cell module (100), for example, SOC (State of Charge) or SOH (State of Health), based on the measured values ​​of the monitored voltage, current, temperature, etc.

[0059] The battery cell module (100) and the plurality of battery cells (110, 120, 130, 140) may experience changes in various factors, such as a decrease in capacity and an increase in internal resistance, as the period of use or the number of uses increases. The battery management device (200) may diagnose abnormal phenomena within the battery cell module (100) and the plurality of battery cells (110, 120, 130, 140) based on data on various factors that change as the battery cells deteriorate and degenerate.

[0060] The battery management device (200) may be a variety of electronic devices for managing, diagnosing, or testing a battery. For example, the battery management device (200) may be included in a battery management system (BMS) inside or outside a vehicle, or may be implemented as a separate external device distinct from the BMS inside the vehicle. According to an embodiment, the battery management device (200) may be included in a device for charge and discharge testing, such as a server, a cloud server, or a charge and discharge cycler, or may be included in various devices for diagnosing or testing a battery.

[0061] FIG. 2 is a block diagram showing a battery management device according to one embodiment disclosed in this document.

[0062] Referring to FIG. 2, the battery management device (200) may include an acquisition unit (210) and a controller (220). However, the present invention is not limited thereto, and some components may be omitted from the battery management device (200), and other general-purpose components may be further included in the battery management device (200).

[0063] The acquisition unit (210) can acquire status information of each of the plurality of battery cells (110, 120, 130, 140). For example, the acquisition unit (210) can acquire voltage, current, temperature, etc. of each of the plurality of battery cells (110, 120, 130, 140).

[0064] The controller (220) can control the operations of the battery management device (200). According to an embodiment, the controller (220) can calculate parameters (e.g., SOC (State of Charge), SOH (State of Health), and / or capacity, etc.) indicating the state of each of the plurality of battery cells (110, 120, 130, 140) based on the voltage, current, temperature, etc. of each of the plurality of battery cells (110, 120, 130, 140) obtained from the acquisition unit (210). In addition, the controller (220) can control the operations of each of the plurality of battery cells (110, 120, 130, 140) based on the calculated SOC, SOH, capacity, etc.

[0065] The controller (220) can manage each of the plurality of battery cells (110, 120, 130, 140) by controlling the operation of each of the plurality of battery cells (110, 120, 130, 140). According to an embodiment, the controller (220) can control the charging and / or discharging of each of the plurality of battery cells (110, 120, 130, 140).

[0066] According to an embodiment, the controller (220) can check the degradation status of each of the plurality of battery cells (110, 120, 130, 140) and manage the charging of each of the plurality of battery cells (110, 120, 130, 140) based on the degradation status. Here, the degradation status of the battery cell may mean deterioration and / or degradation of the battery due to charging and discharging of the battery cell. According to an embodiment, the controller (220) can check the degradation status of each of the plurality of battery cells (110, 120, 130, 140) and manage the charging profile used for charging each of the plurality of battery cells (110, 120, 130, 140) based on the degree of degradation.

[0067] The battery cell (110) may deteriorate and / or deteriorate through repeated charging and discharging. For example, the cathode active material of the battery cell (110) may decompose, or byproducts may be generated due to charging and discharging. Lithium plating, in which metallic lithium is deposited, may occur at the cathode of the battery cell (110). Additionally, the electrolyte of the battery cell (110) may oxidize or its crystal structure may be destroyed.

[0068] Such degradation and deterioration of the battery cell (110) may affect the performance of the battery cell (110) compared to the initial production state of the battery cell (110). In addition, it may affect the charging performance of the battery cell (110). Therefore, the battery management device (200) including the controller (220) may check and diagnose the degradation state of each of the plurality of battery cells (110, 120, 130, 140). In addition, the controller (220) may manage the charging of the battery cell (110) based on the state of the degraded battery cell (110) to slow down the degradation rate of the battery cell (110). For example, the controller (220) may maintain or change a charging profile based on the degradation state of the battery cell (110), thereby managing the lifespan of the battery cell (110).

[0069] The controller (220) may have a structure for executing commands that implement the operations of the battery management device (200). The controller (220) may be implemented as an array of multiple logic gates for processing various operations or as a general-purpose microprocessor, and may be composed of a single processor or multiple processors. For example, the controller (220) may be implemented in the form of at least one of a microprocessor, a CPU, a GPU, and an AP.

[0070] The controller (220) may be configured separately from or integrally with memory and / or storage configured to temporarily store data or commands, and may process various operations by executing commands stored in the memory and / or storage. The memory and / or storage may store various data, commands, mobile applications, computer programs, etc. For example, the memory and / or storage may be implemented as a non-volatile device such as ROM, PROM, EPROM, EEPROM, flash memory, PRAM, MRAM, RRAM, FRAM, etc., or a volatile device such as DRAM, SRAM, SDRAM, PRAM, RRAM, FeRAM, etc., and may be implemented in the form of an HDD, SSD, SD, Micro-SD, etc., or in the form of a combination thereof.

[0071] The controller (220) may provide the user with information regarding the degradation status or charging profile of each of the plurality of battery cells (110, 120, 130, 140). For example, the controller (220) may provide information regarding the degradation status or charging profile to a user terminal via a communication unit (not shown), and may also provide information regarding the degradation status or charging profile via a display provided in a vehicle or charger.

[0072] FIG. 3 is a diagram illustrating a battery profile according to one embodiment disclosed in this document.

[0073] For convenience of explanation below, the operation of the controller (220) is described with reference to the battery cell (110), but is not limited thereto, and the operation of the controller (220) can be equally applied to the battery cell module (100) and a plurality of battery cells (110, 120, 130, 140).

[0074] Referring to FIG. 3, the controller (220) can calculate a battery profile (P) related to the battery cell (110) based on information of the battery cell (110), including voltage, current, temperature, etc., acquired from the acquisition unit (210). Here, the battery profile (P) can include a profile based on parameters indicating the state of the battery cell (110) (e.g., State of Charge (SOC), State of Health (SOH), and / or capacity, etc.).

[0075] According to an embodiment, the controller (220) may calculate the capacity of the battery cell (110) based on the voltage of the battery cell (110). For example, the controller (220) may calculate the capacity of the battery cell (110) based on the current applied to the battery cell (110) and the charging time while the battery cell (110) is being charged.

[0076] According to an embodiment, the controller (220) can calculate a battery profile (P) related to the capacity and voltage of the battery cell (110). The battery profile (P) can include a relationship between the voltage of the battery cell (110) corresponding to the capacity of the battery cell (110). For example, the x-axis of FIG. 3 can be the capacity (unit: Ah), and the y-axis can be the voltage (unit: V).

[0077] According to an embodiment, the controller (220) can calculate a battery profile (P) at each point in the life of the battery cell (110). For example, the controller (220) can calculate a battery profile (P) of a Beginning of Life (BoL) state of the battery cell (110) and a Middle of Life (MoL) state of the battery cell (110). According to an embodiment, the controller (220) can calculate a battery profile (P) of a BoL state of the battery cell (110) through an experiment. For example, the controller (220) can calculate a battery profile (P) of a BoL state based on the production specifications of the battery cell (110).

[0078] The battery profile (P) may change during the deterioration and degradation process of the battery cell (110). Therefore, the controller (220) can diagnose the deterioration of the battery cell (110) by comparing the battery profile (P) of the BoL state of the battery cell (110) with the battery profile (P) of the MoL state.

[0079] FIG. 4 is a diagram illustrating a battery profile according to one embodiment disclosed in this document.

[0080] Referring to FIG. 4, the controller (220) can separate the positive electrode profile (Q1) and the negative electrode profile (Q2) from the battery profile (P) of the battery cell (110). Thus, the controller (220) can calculate the positive electrode degradation degree, which is the degree to which the positive electrode of the battery cell (110) has deteriorated, based on the separated positive electrode profile (Q1). In addition, the controller (220) can calculate the negative electrode degradation degree, which is the degree to which the negative electrode of the battery cell (110) has deteriorated, based on the separated negative electrode profile (Q2). Here, the degradation degree may mean the degree to which the negative electrode or the positive electrode has deteriorated compared to the initial state of production.

[0081] According to an embodiment, the battery profile (P) illustrated in FIG. 3 can be separated into the positive profile (Q1) and the negative profile (Q2) illustrated in FIG. 4. The positive profile (Q1) and the negative profile (Q2) illustrated in FIG. 4 are graphs schematically illustrating an XY graph in which the capacity of the battery cell (110) is set as the x-axis and the voltage is set as the y-axis.

[0082] In an embodiment, the controller (220) can separate the negative profile (Q2) or the positive profile (Q1) from the battery profile (P) based on either the positive profile (Q1) or the negative profile (Q2). For example, the controller (220) can separate the negative profile (Q2) based on the battery profile (P) and the positive profile (Q1). In another aspect, the controller (220) can separate the positive profile (Q1) based on the battery profile (P) and the negative profile (Q2). In this way, the controller (220) can separate the profile (voltage profile corresponding to capacity) of a single electrode (e.g., the negative electrode) of the battery cell (110) and the profile (voltage profile corresponding to capacity) of another electrode (e.g., the positive electrode) based on the battery profile (P).

[0083] According to an embodiment, the controller (220) can calculate a positive profile (Q1) and a negative profile (Q2) using the Open Circuit Potential (OCP) of each of the positive and negative electrodes of the battery cell (110). Through this, the controller (220) can separate the battery profile (P) into a positive profile (Q1) and a negative profile (Q2).

[0084] FIG. 5 is a diagram illustrating a battery profile according to one embodiment disclosed in this document.

[0085] Referring to FIG. 5, FIG. 5 is a graph showing a battery profile (P) of a Beginning of Life (BoL) state of a battery cell (110) and a positive electrode profile (Q1(MoL)) of a Middle of Life (MoL) state of a battery cell (110). The x-axis of FIG. 5 may be capacity (unit: Ah), and the y-axis may be voltage (unit: V).

[0086] According to an embodiment, the controller (220) can calculate the degree of degeneration of the battery cell (110) by comparing the anode profile (Q1(MoL)) of the MoL state of the battery cell (110) with a reference anode profile. Here, the anode profile (Q1(MoL)) of the MoL state may refer to the anode profile of the degraded battery cell (110). In addition, the reference anode profile may refer to the anode profile of the battery cell (110) obtained at a point in time that serves as a reference for calculating the degree of degeneration of the battery cell (110). For example, the reference anode profile may refer to the anode profile (Q1(BoL)) of the battery cell (110) in a non-degraded state (i.e., BoL state).

[0087] According to an embodiment, the controller (220) can obtain the positive profile (Q1(BoL)) of the BoL state of the battery cell (110) through an experiment. For example, the controller (220) can obtain the positive profile (Q1(BoL)) of the BoL state of the battery cell (110) based on the production specifications of the battery cell (110). In addition, the controller (220) can obtain the positive profile (Q1(BoL)) of the BoL state of the battery cell (110) from an external device (e.g., a server).

[0088] According to an embodiment, the controller (220) can compare the positive electrode profiles acquired at two different points in time of the battery cell (110), and calculate the degree of positive electrode degradation of the battery cell (110) based on the degree (△Q1) by which the capacity of the positive electrode profile is reduced. According to an embodiment, the controller (220) can calculate the degree of positive electrode degradation of the battery cell (110) based on the degree (△Q1) by which the capacity of the positive electrode profile (Q1(MoL)) of the MoL state of the battery cell (110) is reduced compared to the capacity of the reference positive electrode profile (e.g., Q1(BoL)).

[0089] According to an embodiment, the controller (220) can calculate the degree of reduction (△Q1) in the capacity of the current positive electrode profile of the battery cell (110) based on the maximum capacity of the positive electrode profiles acquired at two different points in time of the battery cell (110). Here, the maximum capacity may mean the capacity of the battery cell (110) when the battery cell (110) is charged to a chargeable capacity.

[0090] For example, if the maximum capacity of the positive electrode profile (Q1(BoL)) of the BoL state of the battery cell (110) is 100 and the maximum capacity of the positive electrode profile (Q1(MoL)) of the MoL state of the battery cell (110) is 95, the controller (220) can calculate the degree of reduction (△Q1) in the maximum capacity of the positive electrode profile by using the difference in the maximum capacities of each positive electrode profile. Here, the degree of reduction (△Q1) in the maximum capacity of the positive electrode profile can be 5, which is the difference obtained by subtracting 95 from 100.

[0091] According to an embodiment, the controller (220) can calculate the degree of anode degradation as 5% based on the degree (△Q1) of reduction in the maximum capacity of the current battery cell (110). Through this, the controller (220) can diagnose the degree of anode degradation, which is the degree to which the anode is degraded compared to the initial production state (BoL) of the battery cell (110) through repeated charging and discharging.

[0092] FIG. 6 is a diagram illustrating a battery profile according to one embodiment disclosed in this document.

[0093] Referring to FIG. 6, FIG. 6 is a graph showing a battery profile (P) of a Beginning of Life (BoL) state of a battery cell (110) and a cathode profile (Q2(MoL)) of a Middle of Life (MoL) state of a battery cell (110). The x-axis of FIG. 6 may be capacity (unit: Ah), and the y-axis may be voltage (unit: V).

[0094] According to an embodiment, the controller (220) can calculate the degree of deterioration of the battery cell (110) by comparing the negative profile (Q2(MoL)) of the MoL state of the battery cell (110) with a reference negative profile. Here, the reference negative profile may mean the negative profile of the battery cell (110) obtained at a point in time that serves as a reference for calculating the degree of deterioration of the battery cell (110). For example, the reference negative profile may mean the negative profile (Q2(BoL)) of the battery cell (110) in a non-degraded state (i.e., BoL state).

[0095] According to an embodiment, the controller (220) can obtain the negative profile (Q2(BoL)) of the BoL state of the battery cell (110) through an experiment. For example, the controller (220) can obtain the negative profile (Q2(BoL)) of the BoL state of the battery cell (110) based on the production specifications of the battery cell (110). In addition, the controller (220) can obtain the negative profile (Q2(BoL)) of the BoL state of the battery cell (110) from an external device (e.g., a server).

[0096] According to an embodiment, the controller (220) can compare the negative profiles acquired at two different points in time of the battery cell (110) and calculate the degree of negative degradation of the battery cell (110) based on the degree of decrease (△Q2) in the capacity of the negative profile. According to an embodiment, the controller (220) can calculate the degree of negative degradation of the battery cell (110) based on the degree of decrease (△Q2) in the capacity of the negative profile (Q2(MoL)) of the MoL state of the battery cell (110) compared to the capacity of the reference negative profile (e.g., Q2(BoL)).

[0097] According to an embodiment, the controller (220) can calculate the degree of reduction (△Q2) in the capacity of the negative profile of the current battery cell (110) based on the maximum capacity of the negative profiles obtained at two different points in time of the battery cell (110). Here, the maximum capacity can mean the capacity of the battery cell (110) when the battery cell (110) is charged to a chargeable capacity.

[0098] For example, if the maximum capacity of the negative profile (Q2(BoL)) of the BoL state of the battery cell (110) is 100 and the maximum capacity of the negative profile (Q2(MoL)) of the MoL state of the battery cell (110) is 90, the controller (220) can calculate the degree of reduction (△Q2=10) in the maximum capacity of each negative profile. In addition, the controller (220) can calculate the degree of negative degradation as 10% based on the degree of reduction (△Q2=10) in the maximum capacity of the current battery cell (110). Through this, the controller (220) can diagnose the degree of negative degradation, which is the degree to which the negative electrode is degraded compared to the initial production state (BoL) of the battery cell (110) as the battery cell (110) is repeatedly charged and discharged.

[0099] Accordingly, the controller (220) can calculate the degree of anode degradation and the degree of cathode degradation based on the battery profile (P), and can confirm the deterioration state of the cathode and the anode of the battery cell (110) based on the calculated degree of anode degradation and the degree of cathode degradation. For example, the controller (220) can determine that the greater the degree of anode degradation of the battery cell (110), the more the cathode active material has decomposed or by-products have been generated in the cathode. In another aspect, the controller (220) can determine that the greater the degree of anode degradation of the battery cell (110), the higher the internal resistance of the cathode. In contrast, the controller (220) can determine that the greater the degree of cathode degradation of the battery cell (110), the more lithium plating has progressed in the cathode.

[0100] According to an embodiment, the controller (220) may determine a primary degradation state among the deterioration states of the positive electrode and the negative electrode of the battery cell (110). Then, the charging profile of the battery cell (110) may be managed based on the determined primary degradation state. Here, the primary degradation state may mean a state that has a greater influence on the deterioration of the battery cell (110) among the deterioration states of the positive electrode and the negative electrode.

[0101] According to an embodiment, the controller (220) may determine the degradation state of an electrode having a greater degradation degree among the anode degradation degree and the cathode degradation degree as the primary degradation state. For example, if the anode degradation degree is 5% and the cathode degradation degree is 10%, the controller (220) may determine the degradation state of the cathode having a greater degradation degree as the primary degradation state.

[0102] According to an embodiment, the controller (220) may manage the charging profile of the battery cell (110) based on the main degradation state. Here, the charging profile of the battery cell (110) may include information regarding the intensity of the charging current (e.g., C-rate) used for charging the battery cell (110). For example, the charging profile may include a profile indicating a correspondence between the capacity of the battery cell (110) and the charging current. In another aspect, the charging profile may include a profile indicating a correspondence between the SOC of the battery cell (110) and the charging current.

[0103] According to an embodiment, the charging profile may include a charging profile for slow charging or fast charging of the battery cell (110). For example, the charging profile may include a QC map (Quick Charge map) for fast charging of the battery cell (110).

[0104] Depending on the embodiment, the positive and negative degradation of the battery cell (110) may produce different results in the charging operation of the battery cell (110). For example, the negative degradation of the battery cell (110) may accelerate the capacity degradation of the battery cell (110) during the charging operation more than the positive degradation. Therefore, the controller (220) manages the charging profile of the battery cell (110) according to the main degradation state, so that the controller (220) can manage the charging of the battery cell (110) by more accurately reflecting the degradation state of the battery cell (110). Through this, the controller (220) can prevent additional degradation due to rapid charging of the battery cell (110).

[0105] FIG. 7 is a diagram illustrating a charging profile according to one embodiment disclosed in this document.

[0106] Referring to FIG. 7, the charge profile (QC) may mean an XY graph in which the charge capacity (unit: Ah) of the battery cell (110) is represented on the x-axis and the charge current (unit: A) is represented on the y-axis. According to an embodiment, the charge profile (QC) may mean a QC map (Quick Charge map) for rapid charging of the battery cell (110). Here, the charge profile may indicate the relationship between the battery capacity and the charge current used for charging the battery cell (110). The charge current may mean the C-rate of rapid charging.

[0107] The controller (220) can manage the charging profile based on a reference charge profile (QC) related to the battery cell (110) when the main degradation state is a deterioration state of the positive electrode. Here, the reference charge profile (QC) can mean a charging profile related to the Beginning of Life (BoL) state of the battery cell (110). For example, the reference charge profile (QC) can mean a rapid charging profile used to rapidly charge a non-degraded battery cell (110). According to an embodiment, the controller (220) can obtain a charging profile of the BoL state through an experiment, and the controller (220) can obtain a charging profile of the BoL state from an external device (e.g., a server).

[0108] When the primary degradation state is a deterioration state of the positive electrode, the resistance of the positive electrode may increase during the charging period of the battery cell (110), and the slope of the voltage profile of the positive electrode may increase. Accordingly, the voltage of the battery cell (110) during the charging period may quickly reach the rated charging voltage. Accordingly, the controller (220) may charge the battery cell (110) without accelerating the degradation of the battery cell (110) without changing the rapid charging profile of the BoL state.

[0109] FIGS. 8 and 9 are diagrams illustrating a charging profile according to one embodiment disclosed in this document.

[0110] Referring to FIGS. 8 and 9, the charge profile (QC) may refer to an XY graph in which the charge capacity (unit: Ah) of the battery cell (110) is represented on the x-axis and the charge current (unit: A) is represented on the y-axis. According to an embodiment, the charge profile (QC) may refer to a QC map (Quick Charge map) for rapid charging of the battery cell (110). Here, the charge profile may represent the relationship between the battery capacity and the charge current (i.e., C-rate) used for charging the battery cell (110).

[0111] The controller (220) can manage the charging profile of the battery cell (110) based on the second charging profile (QC2) when the primary degradation state is the degradation state of the negative electrode. Here, the second charging profile (QC2) may refer to a charging profile that reflects the degradation state of the negative electrode. For example, the controller (220) can calculate the second charging profile (QC2) based on the degradation state of the negative electrode.

[0112] According to an embodiment, the controller (220) may calculate a second charging profile (QC2) based on the first charging profile (QC1). Here, the first charging profile (QC1) may refer to a charging profile related to a BoL state of the battery cell (110), and the second charging profile (QC2) may refer to a charging profile related to a MoL state of the battery cell (110). For example, the first charging profile (QC1) may refer to a rapid charging profile used to rapidly charge a non-degraded battery cell (110), and the second charging profile (QC2) may refer to a rapid charging profile used to rapidly charge a degraded battery cell (110). According to an embodiment, the controller (220) may obtain a charging profile of a BoL state through an experiment, and the controller (220) may obtain a charging profile of a BoL state from an external device (e.g., a server).

[0113] Lithium plating, which is the main cause of negative electrode degradation, can cause a short circuit between electrodes inside the battery cell (110) and result in a decrease in the capacity of the battery cell (110). For example, when a battery cell (110) is rapidly charged using a charge profile related to the BoL state of the battery cell (110), the capacity decrease of the battery cell (110) due to degradation is not reflected, and thus, negative electrode degradation may be further accelerated. Therefore, when negative electrode degradation is the main degradation state, the controller (220) can generate a second charge profile (QC2) that reflects the degradation state of the battery cell (110). For example, the controller (220) can change the charge profile related to the BoL state to a charge profile related to the MoL state. Through this optimized charge profile, the controller (220) can slow down the rate of capacity decline of the battery cell (110) and manage the degradation of the battery cell (110).

[0114] According to an embodiment, the second charging profile (QC2) may include two types of second charging profiles (e.g., QC2(A) or QC2(B)). A description thereof is provided below with reference to FIGS. 8 and 9.

[0115] Referring to FIG. 8, the controller (220) can change the charging current of the first charging profile (QC1) related to the BoL state of the battery cell (110) to calculate the second charging profile (QC2(A)). Here, the first charging profile (QC1) may be a profile indicating a charging current corresponding to a capacity for rapid charging in the BoL state of the battery cell (110). According to an embodiment, the controller (220) can calculate the second charging profile (QC2(A)) by reducing the charging current of the first charging profile (QC1) by the amount of negative electrode degradation. Here, the charging current may mean the C-rate of rapid charging.

[0116] According to an embodiment, the controller (220) can calculate the second charge profile (QC2(A)) by reducing the charge current of the first charge profile (QC1) by the degree of negative electrode degradation (10%). For example, the controller (220) can rapidly charge the battery cell (110) at a C-rate that is reduced by the degree of negative electrode degradation (e.g., 10%) compared to when the battery cell (110) is in a BoL state. By reducing the C-rate by the degree of negative electrode degradation during rapid charging, the controller (220) can complete charging before lithium plating occurs. Through this, the controller (220) can prevent lithium plating, improve the depth of rapid charging, and manage degradation of the battery cell (110).

[0117] Referring to FIG. 9, the controller (220) can calculate a second charging profile (QC2(B)) by changing the charging capacity of the first charging profile (QC1) related to the BoL state of the battery cell (110). Here, the first charging profile (QC1) may be a profile indicating a charging current corresponding to the capacity for rapid charging in the BoL state of the battery cell (110). According to an embodiment, the controller (220) can calculate the second charging profile (QC2(B)) by reducing the charging capacity of the first charging profile (QC1) by the degree of negative electrode degradation.

[0118] According to an embodiment, the controller (220) can calculate the second charge profile (QC2(B)) by reducing the charge capacity of the first charge profile (QC1) by the negative electrode degradation degree (10%). For example, the controller (220) can calculate the capacity of the battery cell (110) charged by a specific C-rate during rapid charging as a capacity reduced by the negative electrode degradation degree (e.g., 10%) compared to when the battery cell (110) is in a BoL state. Accordingly, the controller (220) can complete the charging before lithium plating occurs by reducing the charge capacity by the negative electrode degradation degree during rapid charging. Through this, the controller (220) can improve the rapid charge depth by preventing lithium plating and manage the degradation of the battery cell (110).

[0119] FIG. 10 is an operation flowchart of a battery management device according to one embodiment disclosed in this document.

[0120] Referring to FIG. 10, the battery management device (200) may include a step (S101) of calculating a battery profile (P) related to the capacity and voltage of a battery cell based on the voltage of the battery cell (110), a step (S102) of checking the deterioration status of the positive and negative electrodes of the battery cell (110) using the battery profile (P), and a step (S103) of managing a charging profile used for charging the battery cell (110) based on the deterioration status of the positive and negative electrodes. According to an embodiment, the operation of the battery management device (200) may be performed by the controller (220).

[0121] At step S101, the controller (220) can calculate a battery profile (P) related to the capacity and voltage of the battery cell (110) based on the voltage of the battery cell (110) (S101). Here, the voltage of the battery cell (110) can be acquired by the acquisition unit (210).

[0122] In step S102, the controller (220) can check the degradation status of the positive and negative electrodes of the battery cell (110) using the battery profile (P) (S102). According to an embodiment, the controller (220) can calculate the degree of degradation of the positive electrode of the battery cell (110) and the degree of degradation of the negative electrode of the battery cell (110) using the battery profile (P). According to an embodiment, the controller (220) can separate the positive electrode profile (Q1) and the negative electrode profile (Q2) from the battery profile (P), and calculate the degree of degradation of the positive electrode and the degree of degradation based on the degree to which the capacity of the positive electrode profile (Q1) and the negative electrode profile (Q2) is reduced compared to the capacity of the reference positive electrode profile and the reference negative electrode profile. Thus, the controller (220) can check the degradation status of the positive electrode and the negative electrode based on the degree of degradation of the positive electrode and the degree of degradation of the negative electrode.

[0123] At step S103, the controller (220) can manage the charging profile used for charging the battery cell (110) based on the degradation status of the positive and negative electrodes (S103).

[0124] FIG. 11 is an operation flowchart of a battery management device according to one embodiment disclosed in this document.

[0125] Referring to FIG. 11, the battery management device (200) determines a main degradation state that has a greater influence on the degradation of the battery cell (110) among the degradation state of the positive electrode and the degradation state of the negative electrode of the battery cell (110) (S201), if the main degradation state is the degradation state of the positive electrode, manages a charging profile used for charging the battery cell (110) based on a first charging profile (QC1) related to the battery cell (110), if the main degradation state is the degradation state of the negative electrode, manages a charging profile used for charging the battery cell (110) based on a second charging profile (QC2) that is a charging profile reflecting the degradation state of the negative electrode, (S203), reduces the charging current of the first charging profile (QC1) by the degree of degradation of the negative electrode to calculate a second charging profile (QC2) (S204), and reduces the charging capacity of the first charging profile (QC1) by the degree of degradation of the negative electrode to calculate the second charging profile. It may include a step (S205) of producing a profile (QC2).

[0126] In step S201, the controller (220) can determine a primary degradation state that has a greater influence on the degradation of the battery cell (110) among the degradation states of the positive electrode and the negative electrode (S201). According to an embodiment, the controller (220) can determine the degradation state of an electrode having a greater degradation degree among the positive electrode degradation degree and the negative electrode degradation degree as the primary degradation state.

[0127] In step S202, the controller (220) can manage the charging profile used for charging the battery cell (110) based on the first charging profile (QC1) associated with the battery cell (110) when the primary degradation state is a positive degradation state (S202). According to an embodiment, the controller (220) can maintain the rapid charging profile of the BoL state of the battery cell (110) as it is and manage the charging profile to rapidly charge the battery cell (110).

[0128] In step S203, the controller (220) can manage the charging profile used for charging the battery cell (110) based on the second charging profile (QC2), which is a charging profile reflecting the deterioration state of the negative electrode, when the main deterioration state is the deterioration state of the negative electrode (S203). According to an embodiment, the controller (220) can rapidly charge the battery cell (110) using the second charging profile (QC2) that changes the rapid charging profile of the BoL state of the battery cell (110).

[0129] At step S204, the controller (220) can reduce the charging current of the first charging profile (QC1) by the amount of negative electrode degradation to produce the second charging profile (QC2) (S204).

[0130] At step S205, the controller (220) can reduce the charge capacity of the first charge profile (QC1) by the amount of negative electrode degradation to produce the second charge profile (QC2) (S205).

[0131] FIG. 12 is a block diagram showing the hardware configuration of a computing system for performing an operating method of a battery management device according to one embodiment disclosed in this document.

[0132] Referring to FIG. 12, a computing system (2000) according to one embodiment disclosed in the present document may include an MCU (2010), a memory (2020), an input / output I / F (2030), and a communication I / F (2040).

[0133] The MCU (2010) may be a processor that executes various programs (e.g., a battery cell characteristic data collection program, a battery profile creation program, a battery cell diagnosis program, etc.) stored in the memory (2020), processes various information including battery cell characteristic data and battery cell status data through these programs, and performs the functions of the controller (220) included in the battery management device (200) shown in FIGS. 1 to 11 described above.

[0134] The memory (2020) can store various programs executed by the MCU (2010), such as a battery cell characteristic data collection program, a battery profile creation program, and a battery cell diagnosis program. In addition, the memory (2020) can store various information, including battery cell characteristic data, battery cell status data, battery cell parameters, and battery degradation levels.

[0135] Such memories (2020) may be provided in multiples as needed. The memories (2020) may be volatile or non-volatile memories. As volatile memories (2020), RAM, DRAM, SRAM, etc. may be used. As non-volatile memories (2020), ROM, PROM, EAROM, EPROM, EEPROM, flash memory, etc. may be used. The examples of the memories (2020) listed above are merely examples and are not limited to these examples.

[0136] The input / output I / F (2030) can provide an interface that enables data transmission and reception between an input device (not shown) such as a keyboard, mouse, or touch panel, and an output device (not shown) such as a display and the MCU (2010).

[0137] The communication I / F (2040) is a component capable of transmitting and receiving various data with the server, and may be any device capable of supporting wired or wireless communication. For example, the battery management device (200) can transmit and receive various information, including the SOC, OCV, and parameters of the battery cell, from a separately provided external server via the communication I / F (2040).

[0138] In this way, a computer program according to an embodiment disclosed in this document may be implemented as a module that is recorded in a memory (2020) and processed by an MCU (2010) to perform each function illustrated in FIG. 2, for example.

[0139] Although all components constituting the embodiments disclosed in this document have been described as being combined or operating in combination as one, the embodiments disclosed in this document are not necessarily limited to such embodiments. That is, within the scope of the purpose of the embodiments disclosed in this document, all of the components may be selectively combined and operated one or more times.

[0140] In addition, terms such as "include," "comprise," or "have" described above, unless specifically stated otherwise, mean that the corresponding component can be included, and therefore should be interpreted to include other components rather than excluding other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments disclosed in this document belong, unless otherwise defined. Commonly used terms, such as terms defined in a dictionary, should be interpreted to be consistent with the contextual meaning of the relevant technology, and shall not be interpreted in an idealized or overly formal sense, unless explicitly defined in this document.

[0141] The foregoing disclosure outlines features of several embodiments to enable those skilled in the art to better understand the aspects of the present disclosure. Those skilled in the art will readily appreciate that the present disclosure can be readily used as a basis for designing or modifying other structures to achieve the same purposes or advantages of the embodiments introduced herein. Furthermore, those skilled in the art will recognize that such equivalent structures do not depart from the scope of the present disclosure, and that various changes, substitutions, and modifications can be made herein without departing from the scope of the present disclosure.

[0142] [Explanation of symbols]

[0143] 100: Battery cell module

[0144] 110, 120, 130, 140: Battery cells

[0145] 200: Battery management device

[0146] 300: Relay

[0147] 210: Acquisition Department

[0148] 220: Controller

[0149] 1000: Battery cell pack

[0150] 2000: Computing Systems

[0151] 2010: MCU

[0152] 2020: Memory

[0153] 2030: Input / Output I / F

[0154] 2040: Communication I / F

Claims

1. An acquisition unit for acquiring the voltage of a battery cell; and Based on the voltage of the battery cell, the capacity of the battery cell and the battery profile related to the voltage are calculated, Using the above battery profile, check the deterioration status of the positive and negative electrodes of the battery cell, A battery management device including a controller that manages a charging profile used for charging the battery cell based on the deterioration states of the positive and negative electrodes.

2. In claim 1, The above controller, Based on the above battery profile, the degree of deterioration of the positive electrode of the battery cell is calculated, and the degree of deterioration of the negative electrode of the battery cell is calculated, A battery management device that checks the deterioration status of the positive and negative electrodes based on the positive and negative electrode deterioration levels.

3. In claim 2, The above controller, Separate the positive and negative profiles from the above battery profile, A battery management device that calculates the degree of anode degradation and the degree of cathode degradation based on the degree to which the capacity of the anode profile and the cathode profile is reduced compared to the capacity of the reference anode profile and the reference cathode profile.

4. In claim 2, The above controller, Among the deterioration states of the positive electrode and the negative electrode of the battery cell, a primary deterioration state that has a greater influence on the deterioration of the battery cell is determined. A battery management device that manages the charging profile based on the above-mentioned state of degradation.

5. In claim 4, The above controller, A battery management device that determines the deterioration state of an electrode having a greater deterioration degree among the above-mentioned positive deterioration degree and the above-mentioned negative deterioration degree as the main deterioration state.

6. In claim 4, The above controller, A battery management device that manages a charging profile used for charging the battery cell based on a first charging profile associated with the battery cell, when the above-mentioned primary degradation state is a positive electrode degradation state.

7. In claim 6, A battery management device wherein the first charging profile is a charging profile related to the BoL (Beginning of Life) state of the battery cell.

8. In claim 4, The above controller, A battery management device that manages a charging profile used for charging the battery cell based on a second charging profile that is a charging profile reflecting the deterioration state of the negative electrode when the above-mentioned primary deterioration state is a deterioration state of the negative electrode.

9. In claim 8, The above controller, A battery management device that calculates the second charging profile by reducing the charging current of the first charging profile by the degree of negative electrode degradation based on a first charging profile indicating a charging current corresponding to the capacity of the battery cell related to the BoL (Beginning of Life) state of the battery cell.

10. In claim 8, The above controller, A battery management device that calculates the second charging profile by reducing the capacity of the first charging profile by the negative electrode degradation degree based on a first charging profile indicating a charging current corresponding to the capacity of the battery cell related to the BoL (Beginning of Life) state of the battery cell.

11. In claim 1, A battery management device in which the above charging profile is a profile indicating the corresponding relationship between the capacity of the battery cell and the charging current for rapid charging of the battery cell.

12. A step of calculating a capacity of the battery cell based on the voltage of the battery cell and a battery profile related to the voltage; A step of checking the deterioration status of the positive and negative electrodes of the battery cell using the above battery profile; and A battery management method comprising a step of managing a charging profile used for charging the battery cell based on the deterioration states of the positive and negative electrodes.

13. In claim 12, The step of checking the deterioration status of the positive and negative electrodes of the above battery cells is: A step of calculating a positive electrode degradation degree, which is the degree to which the positive electrode of the battery cell is degraded, and a negative electrode degradation degree, which is the degree to which the negative electrode of the battery cell is degraded, based on the battery profile; and A battery management method comprising a step of checking the deterioration status of the positive electrode and the negative electrode based on the positive electrode deterioration degree and the negative electrode deterioration degree.

14. In claim 13, The step of calculating the above anode degeneration degree and cathode degeneration degree is: A step of separating the positive electrode profile and the negative electrode profile from the above battery profile; and A battery management method comprising a step of calculating the degree of anode degradation and the degree of cathode degradation based on the degree to which the capacity of the anode profile and the cathode profile is reduced compared to the capacity of the reference anode profile and the reference cathode profile.

15. In claim 13, The steps for managing the above charging profile are: A step of determining a primary degradation state that has a greater influence on the degradation of the battery cell among the degradation states of the positive electrode and the negative electrode of the battery cell; and A battery management method comprising a step of managing the charging profile based on the above-mentioned main degradation state.

16. In claim 15, The step of determining the above-mentioned state of degeneration is: A battery management method comprising a step of determining a degradation state of an electrode having a greater degradation degree among the above positive electrode degradation degrees and the above negative electrode degradation degrees as the main degradation state.

17. In claim 15, The steps for managing the above charging profile are: A battery management method for managing a charging profile used for charging a battery cell based on a first charging profile associated with the battery cell, when the above-mentioned primary degradation state is a positive electrode degradation state.

18. In claim 15, The steps for managing the above charging profile are: A battery management method for managing a charging profile used for charging the battery cell based on a second charging profile that is a charging profile reflecting the deterioration state of the negative electrode when the above-mentioned primary deterioration state is a deterioration state of the negative electrode.

19. In claim 18, A battery management method comprising: a step of calculating the second charging profile by reducing the charging current of the first charging profile by the degree of negative electrode degradation based on a first charging profile indicating a charging current corresponding to the capacity of the battery cell related to the BoL (Beginning of Life) state of the battery cell.

20. In claim 18, A battery management method comprising the step of generating the second charging profile by reducing the capacity of the first charging profile by the degree of negative electrode degradation based on the first charging profile indicating the charging current corresponding to the capacity of the battery cell related to the BoL (Beginning of Life) state of the battery cell.

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