Battery control apparatus and method therefor

Abstract

A battery control apparatus according to an embodiment of the present document comprises: a memory in which one or more instructions are stored; and a processor for executing the one or more instructions, wherein the processor acquires, on the basis of battery information including at least one factor affecting the lifetime of a battery, a data map indicating the at least one factor according to the state of charge (SOC) of the battery, and can control the battery on the basis of identifying the lifetime of the battery by using the data map.

Description

Battery control device and method

[0001] Cross-citation with related applications

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0187515 filed on December 16, 2024, and includes all contents disclosed in the document of said patent application as part of this specification.

[0003] Technology field

[0004] The embodiments disclosed in this document relate to a battery control device and a method thereof.

[0005] Recently, active research and development on secondary batteries has been underway. Here, secondary batteries are rechargeable batteries that can be interpreted to encompass conventional Ni / Cd and Ni / MH batteries, as well as recent lithium-ion batteries. With their scope of application expanding to include power sources for electric vehicles, they are garnering attention as a next-generation energy storage medium.

[0006] Various methods are being researched to diagnose battery status and perform control based on that status. In particular, while real-time diagnosis and control of the battery can significantly improve battery performance and lifespan, research in this area is currently lacking.

[0007] Therefore, this document aims to provide various methods for controlling the battery according to its condition.

[0008] According to the embodiments disclosed in this document, the present invention aims to provide a battery control device and a method thereof, which use battery information to obtain a data map, use the obtained data map to identify the life of a battery, and control a battery based on the identified life of the battery.

[0009] According to the embodiments disclosed in this document, the present invention aims to provide a battery control device and a method thereof that identify a section where battery degradation is accelerated and control the battery by avoiding it.

[0010] The technical problems of the present invention 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.

[0011] A battery control device according to one embodiment of the present document includes a memory storing one or more instructions and a processor that executes said one or more instructions, and the processor can control said battery based on battery information including at least one factor affecting the lifespan of the battery, by obtaining a data map indicating said at least one factor according to the state of charge (SOC) of said battery, and by identifying the lifespan of said battery using said data map.

[0012] In one embodiment, the battery information may include at least one of information related to the positive electrode capacity loss of the battery, information related to the negative electrode capacity loss of the battery, information related to the available lithium loss of the battery, or any combination thereof.

[0013] In one embodiment, the data map may include at least one of a first data map expressing a positive capacity loss according to the SOC of the battery, a second data map expressing a negative capacity loss according to the SOC of the battery, a third data map expressing available lithium loss according to the resistance of the battery, a fourth data map expressing the SOH (state of health) of the battery, or any combination thereof.

[0014] In one embodiment, the processor can determine whether to provide a first function or a second function using the battery based on identifying the lifespan of the battery when the battery is in a middle of life (MoL) state.

[0015] In one embodiment, the processor may provide the second function using the battery based on the fact that the life of the battery has decreased to below a specified value during the process of providing the first function using the battery.

[0016] In one embodiment, the battery includes a first battery, and the processor identifies an equilibrium peak in the capacity change of the first battery relative to the voltage change of the first battery using the data map, and when controlling a second battery different from the first battery, the second battery can be controlled to a range including the equilibrium peak or less.

[0017] In one embodiment, the processor can control the battery through DoD (depth of discharge) control of the battery.

[0018] In one embodiment, the processor can perform the DoD control based on the voltage range in the middle of life (MoL) state of the battery and the charging profile of the battery.

[0019] A processor according to one embodiment of the present document may include the operation of obtaining a data map indicating the at least one factor according to the state of charge (SOC) of the battery based on battery information including at least one factor affecting the battery life, and the operation of controlling the battery based on identifying the battery life using the data map.

[0020] In one embodiment, the battery information may include at least one of information related to the positive electrode capacity loss of the battery, information related to the negative electrode capacity loss of the battery, information related to the available lithium loss of the battery, or any combination thereof.

[0021] In one embodiment, the data map may include at least one of a first data map expressing a positive capacity loss according to the SOC of the battery, a second data map expressing a negative capacity loss according to the SOC of the battery, a third data map expressing available lithium loss according to the resistance of the battery, a fourth data map expressing the SOH (state of health) of the battery, or any combination thereof.

[0022] The battery control method according to one embodiment may include an operation of identifying whether to provide a first function or a second function using the battery based on identifying the lifespan of the battery when the battery is in a middle of life (MoL) state by the processor.

[0023] The battery control method according to one embodiment may include an operation of providing the second function using the battery based on the fact that the battery life has decreased to below a specified value during the process of providing the first function using the battery by the processor.

[0024] In one embodiment, the battery includes a first battery, and the battery control method may include, by the processor, an operation of identifying an equilibrium peak in the capacity change of the first battery relative to the voltage change of the first battery using the data map, and, by the processor, an operation of controlling the second battery to a range including the equilibrium peak or less when controlling a second battery different from the first battery.

[0025] The battery control method according to one embodiment may include an operation of controlling the battery by controlling the depth of discharge (DoD) of the battery by the processor.

[0026] This technology can acquire a data map using battery information, identify the battery life using the acquired data map, and control the battery based on the identified battery life.

[0027] In addition, this technology can control the battery by identifying sections where battery degradation accelerates and avoiding them.

[0028] In addition, various effects that can be identified directly or indirectly through this document may be provided.

[0029] FIG. 1 is a block diagram showing a battery pack in a battery control device and battery control method according to one embodiment of the present document.

[0030] FIG. 2 illustrates an example of a block diagram showing the configuration of a battery control device according to one embodiment of the present document.

[0031] FIG. 3 illustrates an example of a data map related to the positive capacity loss of a battery in one embodiment of the present document.

[0032] FIG. 4 illustrates an example of a data map related to the negative electrode capacity loss of a battery in one embodiment of the present document.

[0033] FIG. 5 illustrates an example of a data map related to available lithium loss of a battery in one embodiment of the present document.

[0034] FIG. 6 illustrates an example of a degradation map related to battery degradation in one embodiment of the present document.

[0035] FIG. 7 illustrates an example of a battery charging profile in one embodiment of the present document.

[0036] FIG. 8 illustrates an example of a dQ / dV graph according to voltage in one embodiment of the present document.

[0037] FIG. 9 illustrates an example of a graph representing the discharge retention of a battery in one embodiment of the present document.

[0038] FIG. 10 illustrates an example of a flowchart related to a battery control method according to one embodiment of the present document.

[0039] FIG. 11 illustrates an example of a graph representing battery retention when controlling a battery using conventional technology.

[0040] FIG. 12 illustrates an example of a graph representing battery retention when a battery is controlled through a battery control device or battery control method according to an embodiment of the present document.

[0041] FIG. 13 illustrates an example of a graph showing that the SOH of a battery increases when the battery is controlled through a battery control device or battery control method according to one embodiment of the present document.

[0042] FIG. 14 is a block diagram showing the hardware configuration of a computing system for performing a battery control method in a battery control device and a battery control method according to one embodiment of the present document.

[0043] Some embodiments disclosed herein are described below with reference to the various embodiments of the accompanying drawings. However, this is not intended to limit the technology to specific embodiments and should be understood to include various modifications, equivalents, and / or alternatives to embodiments of the technology.

[0044] It should be noted that when assigning reference numerals to the components of each drawing, the same components are assigned the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the various embodiments disclosed in this document, if it is determined that a detailed description of related known configurations or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted. The singular form of a noun corresponding to an item may include one or more items unless the relevant context clearly indicates otherwise.

[0045] In describing the components of the embodiments of this document, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended merely 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 pertain. 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.

[0046] Additionally, in this disclosure, expressions of "greater than" or "less than" may be used to determine whether a specific condition is satisfied or fulfilled; however, this is merely for the purpose of expressing an example and does not exclude descriptions of "greater than" or "less than." Conditions described as "greater than" may be replaced with "greater than," conditions described as "less than" may be replaced with "less than," and conditions described as "greater than and less than" may be replaced with "greater than and less than." Furthermore, "A" to "B" below refer to at least one of the elements from A (including A) to B (including B).

[0047] In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0048] In this document, where any component (e.g., 1) is referred to as being “connected,” “coupled,” or “joined” to another component (e.g., 2), with or without the terms “functionally” or “communicationally,” or where it is referred to as “coupled” or “connected,” it means that the component may be connected to the other component directly (e.g., via a wire), wirelessly, or through a third component.

[0049] According to one embodiment, the method according to the various embodiments disclosed herein may be provided as included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) 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 created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0050] According to various embodiments, each component (e.g., module or program) of the described components may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to various embodiments, one or more of the aforementioned components or operations may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as they were performed by the corresponding component among the multiple components prior to integration. According to various embodiments, operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically; one or more of the operations may be executed in a different order; may be omitted; or one or more other operations may be added.

[0051] Hereinafter, embodiments of the present document will be described in detail with reference to FIGS. 1 to 14.

[0052] FIG. 1 is a block diagram showing a battery pack in a battery control device and battery control method according to one embodiment of the present document.

[0053] Referring to FIG. 1, the battery pack (1) may include a battery unit (12), a sensor unit (14), a switching unit (16), and a battery management system (BMS) (20). At this time, the battery pack (1) may be equipped with a plurality of battery units (12), sensor units (14), switching units (16), and battery management systems (20).

[0054] According to one embodiment, the battery unit (12) can supply power to a target device (not shown). To this end, the battery unit (12) may be electrically connected to the target device. Here, the target device may include an electrical, electronic, or mechanical device that operates by receiving power from the battery pack (1). For example, the target device may be an electric vehicle (EV), but is not limited thereto.

[0055] According to one embodiment, the battery unit (12) may include at least one rechargeable battery cell (10). Here, the battery cell (10) may be a basic unit of a battery cell capable of charging and discharging electrical energy. For example, the battery cell (10) may be a lithium-ion (Li-ion) battery, a lithium-ion polymer (Li-ion polymer) battery, a nickel-cadmium (Ni-Cd) battery, a nickel-hydrogen (Ni-MH) battery, etc., but is not limited thereto.

[0056] According to one embodiment, a plurality of battery units (12) may be connected in series or in parallel. For example, a battery unit (12) may be a battery module, a battery bank, or a set of battery cells (cell-to-pack structure).

[0057] According to one embodiment, the sensor unit (14) can obtain information related to the battery unit (12). According to one embodiment, the sensor unit (14) can obtain values ​​(or information) related to the state of each of the battery unit (12) or battery cells (10). In one embodiment, the values ​​related to the state may include one or more values ​​for the voltage, current, resistance, state of charge (SOC), state of health (SOH), or temperature of the battery cell, or a combination thereof.

[0058] According to one embodiment, the sensor unit (14) can provide information of each of the plurality of battery units (12) to the battery management system (20).

[0059] According to one embodiment, the switching unit (16) may include an element for controlling the current flow for charging or discharging the battery unit (12). For example, the switching unit (16) may include at least one relay and / or magnetic contactor, etc., depending on the specifications of the battery pack (1).

[0060] According to one embodiment, a battery management system (BMS) (20) can monitor the voltage, current, temperature, etc. of a battery pack (1) and control or manage the battery pack (1) to prevent overcharging and over-discharging. For example, the battery management system (20) may include a plurality of terminals as an interface for receiving values ​​of the various parameters described above, and a circuit connected to these terminals to perform processing of the received values. Additionally, the battery management system (20) may control a sensor unit (14) and / or a switching unit (16). For example, the battery management system (20) may be connected to a plurality of battery units (12) to monitor the status of each of the plurality of battery units (12) and control the ON / OFF of relays or contactors.

[0061] According to one embodiment, the operation of the battery management system (20) can be performed by a battery management system (BMS) in the vehicle, as well as by various devices such as a server, cloud, charger, or charger / discharger.

[0062] The upper controller (2) can transmit control signals for a plurality of battery units (12) to the battery management system (20). Accordingly, the operation of the battery management system (20) can be controlled based on the signals applied from the upper controller (2).

[0063] According to one embodiment, the battery management system (20) may include the battery control device (200) of FIG. 2. According to another embodiment, the battery management system (20) may be a different system from the battery control device (200) of FIG. 2. That is, the battery control device (200) of FIG. 2 may be included in the battery pack (1) or may be configured as another device outside the battery pack (1). For convenience of explanation, the following description assumes that the battery control device (200) is configured as another device outside the battery pack (1). Furthermore, the operation of the battery control device (200) below may be performed by a battery management system (BMS) within the vehicle, as well as by various devices such as a server, cloud, charger, or charger / discharger.

[0064] FIG. 2 illustrates an example of a block diagram showing the configuration of a battery control device according to one embodiment of the present document.

[0065] Referring to FIG. 2, a battery control device (200) according to one embodiment may include a processor (210) and a memory (220). The processor (210) and the memory (220) may be electrically and / or operably coupled with each other by an electronic device including a communication bus.

[0066] In the following, the hardware being operatively coupled may include direct and / or indirect connections between the hardware being established via wired and / or wireless connections so that the second hardware is controlled by the first hardware among the hardware.

[0067] Although the hardware is illustrated in different blocks, the embodiment is not limited thereto. For example, some of the hardware in FIG. 2 may be included in a single integrated circuit including a system-on-a-chip (SoC). The type and / or number of hardware included in the battery control unit (200) are not limited to those illustrated in FIG. 2. For example, the battery control unit (200) may include only some of the hardware illustrated in FIG. 2.

[0068] A battery control device (200) according to one embodiment may include hardware for processing data based on one or more instructions. The hardware for processing data may include a processor (210).

[0069] For example, hardware for processing data may include an arithmetic and logic unit (ALU), a floating point unit (FPU), a field programmable gate array (FPGA), a central processing unit (CPU), and / or an application processor (AP). The processor (210) may have the structure of a single-core processor or the structure of a multi-core processor including a dual core, a quad core, a hexa core, or an octa core.

[0070] A memory (220) of a battery control device (200) according to one embodiment may include a hardware component for storing data and / or instructions that are input and / or output to a processor (210) of the battery control device (200).

[0071] For example, the memory (220) may include volatile memory including random-access memory (RAM) and / or non-volatile memory including read-only memory (ROM).

[0072] For example, volatile memory may include at least one of DRAM (dynamic RAM), SRAM (static RAM), Cache RAM, PSRAM (pseudo SRAM), or any combination thereof.

[0073] For example, non-volatile memory may include at least one of PROM (programmable ROM), EPROM (erasable PROM), EEPROM (electrically erasable PROM), flash memory, hard disk, compact disk, SSD (solid state drive), eMMC (embedded multi-media card), or any combination thereof.

[0074] For example, within the memory (220) of the battery control device (200), one or more instructions (or commands) representing operations and / or actions to be performed on data by the processor (210) of the battery control device (200) may be stored. A set of one or more instructions may be referred to as a program, firmware, operating system, process, routine, sub-routine, and / or application. Hereinafter, the statement that an application is installed within the battery control device (200) may mean that one or more instructions provided in the form of an application are stored within the memory (220), and that one or more applications are stored in an executable format (e.g., a file having an extension specified by the operating system of the battery control device (200)) by the processor (210) of the battery control device (200).

[0075] A processor (210) of a battery control device (200) according to one embodiment can identify battery information including at least one factor affecting the lifespan of the battery. For example, the processor (210) can obtain a data map representing at least one factor according to the state of charge (SOC) of the battery based on the battery information including at least one factor affecting the lifespan of the battery.

[0076] For example, the battery information may include information related to the positive capacity loss of the battery. For example, the battery information may include information related to the negative capacity loss of the battery. For example, the battery information may include information related to the available lithium loss of the battery. For example, the battery information may include at least one of information related to the positive capacity loss of the battery, information related to the negative capacity loss of the battery, information related to the available lithium loss of the battery, or any combination thereof.

[0077] For example, the data map may include a first data map expressing the positive capacity loss according to the battery's SOC. For example, the data map may include a second data map expressing the negative capacity loss according to the battery's SOC. For example, the data map may include a third data map expressing the available lithium loss according to the battery's resistance. For example, the data map may include a fourth data map expressing the battery's SOH (state of health). For example, the data map may include at least one of a first data map expressing the positive capacity loss according to the battery's SOC, a second data map expressing the negative capacity loss according to the battery's SOC, a third data map expressing the available lithium loss according to the battery's resistance, a fourth data map expressing the battery's SOH, or any combination thereof.

[0078] In one embodiment, the processor (210) can generate a degradation map representing the degradation of the battery based on a data map. For example, the degradation map of the battery can be expressed as the degree of positive degradation according to the battery's SOC.

[0079] In one embodiment, the processor (210) can identify a risk zone according to the battery's SOC based on a degradation map. For example, the processor (210) can identify a risk zone according to the battery's SOC based on a data map. For example, the risk zone may include a section where the battery's degradation is accelerated. For example, the risk zone may include a section where the battery's degradation rate is greater than a specified rate.

[0080] In one embodiment, the processor (210) may generate a degradation map representing the degradation of the battery based on a data map. For example, the degradation map of the battery may include a graph representing the lifespan of the battery. For example, the lifespan of the battery may include at least one of the battery retention, the battery's state of health (SOH), or any combination thereof.

[0081] In one embodiment, the processor (210) can identify the cause of the decrease in battery life based on a data map. For example, the processor (210) can define the state of the battery and determine the cause of the degradation based on a degradation map generated using the data map to represent the degradation of the battery. For example, the state of the battery may include a MoL (middle of life) state, a BoL (beginning of life) state, and an EoL (end of life) state.

[0082] In this document, controlling the battery based on a data map may include controlling the battery using a degradation map generated through the data map.

[0083] A processor (210) of a battery control device (200) according to one embodiment can identify the battery life using a data map. For example, the processor (210) can control the battery based on identifying the battery life using the data map. For example, the processor (210) can control the battery in a direction that increases the battery life.

[0084] For example, controlling the battery may include controlling the output of the battery, adjusting the SOC range during which the battery charges and discharges, or at least one of any combination thereof.

[0085] For example, the processor (210) can control the output of the battery based on identifying the battery life using a data map. For example, the processor (210) can adjust the SOC interval for charging and / or discharging the battery based on identifying the battery life using a data map.

[0086] For example, the processor (210) can adjust the charge depth of the battery based on a data map. For example, the processor (210) can adjust the temperature of the battery based on a data map. For example, the processor (210) can adjust the C-rate when charging the battery based on a data map. For example, the processor (210) can perform at least one of adjusting the charge depth of the battery, adjusting the temperature of the battery, adjusting the C-rate when charging the battery, or any combination thereof based on a data map.

[0087] For example, adjusting the charge depth of the battery may include adjusting the maximum value of the SOC for charging the battery. For example, the processor (210) may charge the battery to an adjusted SOC or lower (or less) based on adjusting the maximum value of the SOC for charging the battery.

[0088] For example, controlling the temperature of the battery may include controlling the temperature of the space where the battery is placed or controlling the temperature of the battery itself.

[0089] For example, adjusting the C-rate when charging the battery may include adjusting the C-rate used when charging the battery. For example, the processor (210) can charge the battery to a specified SOC (e.g., the maximum value of the SOC for charging the battery) by using the C-rate when charging the battery.

[0090] For example, the processor (210) may perform adjusting the charge depth of the battery based on a data map. For example, the processor (210) may perform adjusting the temperature of the battery based on a data map. For example, the processor (210) may perform adjusting the C-rate when charging the battery based on a data map. For example, the processor (210) may perform at least one of adjusting the charge depth of the battery, adjusting the temperature of the battery, adjusting the C-rate when charging the battery, or any combination thereof based on a data map.

[0091] In one embodiment, the processor (210) can control the output of the battery based on identifying a risk range according to the battery's SOC. For example, the processor (210) can control the battery to a level below the risk range. For example, the processor (210) can control the battery to a level below the risk range. For example, the processor (210) can control the battery to a level below the risk range or to a level below the risk range.

[0092] In one embodiment, the processor (210) can identify the battery life using a data map. In one embodiment, the processor (210) can identify the rate at which the battery life decreases using a data map. For example, the processor (210) can identify the rate at which the battery life decreases and / or the battery life using a data map.

[0093] For example, the processor (210) can control the battery based on the rate at which the battery's life decreases. For example, the processor (210) can control the output of the battery based on the rate at which the battery's life decreases. For example, the processor (210) can control the battery based on the battery's life. For example, the processor (210) can control the output of the battery based on the battery's life.

[0094] In one embodiment, the processor (210) can identify the state of the battery. For example, the processor (210) can identify whether the state of the battery is in a MoL state. For example, the processor (210) can identify the battery life when the state of the battery is in a MoL state. For example, the processor (210) can identify the remaining life of the battery when the state of the battery is in a MoL state. For example, the processor (210) can identify whether to provide a first function or a second function using the battery based on identifying the battery life when the state of the battery is in a MoL state.

[0095] For example, the processor (210) can identify that the battery life has decreased to below a specified value during the process of providing a first function using the battery. For example, the processor (210) can provide a second function using the battery based on the fact that the battery life has decreased to below a specified value during the process of providing a first function using the battery. For example, the processor (210) can provide a second function different from the first function using the battery based on the fact that the remaining battery life has decreased to below a specified value during the process of providing a first function using the battery.

[0096] For example, the first function may include using a battery in a vehicle. For example, the second function may include using a battery in an energy storage system (ESS), using a battery in a power tool, using a battery in an uninterruptible power supply system (UPS), using a battery in a power bank, or at least one of any combination thereof.

[0097] For example, the processor (210) can identify a change in capacity of the first battery relative to a change in voltage of the first battery using a data map. For example, the first battery may be included in the battery described above. For example, the processor (210) can identify an equilibrium peak in the change in capacity of the first battery relative to a change in voltage of the first battery using a data map.

[0098] For example, when the processor (210) controls a second battery different from the first battery, it can control the second battery for less than the interval including the equilibrium peak. For example, when the processor (210) controls a second battery different from the first battery, it can control the second battery by avoiding the equilibrium peak.

[0099] In one embodiment, the processor (210) can perform DoD (depth of discharge) control of the battery. For example, the processor (210) can control the battery through DoD control of the battery. For example, DoD control may include a process for managing or limiting the discharge depth of the battery.

[0100] For example, the processor (210) can identify the voltage range in the MoL state of the battery. For example, the processor (210) can obtain the charging profile of the battery. For example, the processor (210) can perform DoD control based on the voltage range in the MoL state of the battery and the charging profile of the battery.

[0101] As described above, the battery control device (200) according to one embodiment can provide the effect of increasing the lifespan of the battery by adjusting the SOC range for charging and discharging the battery or by changing the function provided through the battery.

[0102] FIG. 3 illustrates an example of a data map related to the positive capacity loss of a battery in one embodiment of the present document.

[0103] Referring to FIG. 3, the processor (210) of the battery control device (200) according to one embodiment can obtain a data map representing at least one factor according to the SOC of the battery based on battery information including at least one factor affecting the lifespan of the battery.

[0104] For example, the graph illustrated in FIG. 3 may include a data map representing the positive capacity loss of a battery. The horizontal axis of the graph illustrated in FIG. 3 may represent the SOC of the battery. For example, the vertical axis of the graph illustrated in FIG. 3 may represent degradation per 30 cycles. Although degradation per 30 cycles is illustrated in the graph illustrated in FIG. 3, the embodiments of this document are not limited thereto. For example, the vertical axis of the graph may be represented as degradation per specified cycle rather than degradation per 30 cycles.

[0105] In one embodiment, the processor (210) can identify a designated section (301). For example, the designated section (301) may represent a section at risk of positive degradation. For example, the designated section (301) may be identified by data obtained through an experiment. For example, the section at risk of positive degradation may include a section where the degradation of the battery's positive electrode is faster than in other sections.

[0106] FIG. 4 illustrates an example of a data map related to the negative electrode capacity loss of a battery in one embodiment of the present document.

[0107] Referring to FIG. 4, the processor (210) of the battery control device (200) according to one embodiment can obtain a data map representing at least one factor according to the SOC of the battery based on battery information including at least one factor affecting the battery life.

[0108] For example, the graph illustrated in FIG. 4 may include a data map representing the negative electrode capacity loss of a battery. The horizontal axis of the graph illustrated in FIG. 4 may represent the SOC of the battery. For example, the vertical axis of the graph illustrated in FIG. 4 may represent degradation per 30 cycles. For example, although degradation per 30 cycles is illustrated in the graph illustrated in FIG. 4, the embodiments of this document are not limited thereto. For example, the vertical axis of the graph may be represented as degradation per specified cycle rather than degradation per 30 cycles.

[0109] FIG. 5 illustrates an example of a data map related to available lithium loss of a battery in one embodiment of the present document.

[0110] Referring to FIG. 5, the processor (210) of the battery control device (200) according to one embodiment can obtain a data map representing at least one factor according to the SOC of the battery based on battery information including at least one factor affecting the lifespan of the battery.

[0111] The graph shown in Fig. 5 may represent the resistance and available lithium loss cathode depth at each temperature.

[0112] For example, the graph shown in FIG. 5 may include a data map representing the available lithium loss of the battery. The horizontal axis of the graph shown in FIG. 5 may represent the resistance of the battery. The horizontal axis of the graph being represented as resistance (%) may indicate that the resistance when the battery is in its initial state is 100%, and that the resistance increases with use of the battery. The vertical axis of the graph shown in FIG. 5 may represent the available lithium loss cathode depth of the battery. The available lithium loss cathode depth may include an indicator showing how much available lithium has been lost from the negative electrode of the battery.

[0113] FIG. 6 illustrates an example of a degradation map related to battery degradation in one embodiment of the present document.

[0114] Referring to FIG. 6, a processor (210) of a battery control device (200) according to one embodiment can generate a degradation map related to battery degradation based on a data map. For example, the processor (210) can generate a degradation map using at least some of the data maps described in FIG. 3 to FIG. 5.

[0115] In one embodiment, the processor (210) can obtain first data (601) representing positive degradation according to the battery's SOC when the battery is in a MoL state. For example, the processor (210) can obtain second data (603) representing positive degradation according to the battery's SOC when the battery is in a BoL state.

[0116] For example, the processor (210) can identify a first section (611) in the degradation map. For example, the processor (210) can identify a second section (613) in the degradation map. For example, the first section (611) may represent a positive degradation risk section when the battery is in a MoL state. For example, the second section (613) may represent a positive degradation risk section when the battery is in a BoL state. For example, the positive degradation risk section may be distinguished by experiment.

[0117] For example, the processor (210) can control the battery by avoiding the positive degradation risk section based on the degradation map generated using the data map.

[0118] FIG. 7 illustrates an example of a battery charging profile in one embodiment of the present document.

[0119] Referring to FIG. 7, a processor (210) of a battery control device (200) according to one embodiment can obtain a charging profile related to the battery. For example, the processor (210) can obtain a charging profile during the process of charging a battery in a MoL state. For example, in the graph shown in FIG. 7, the horizontal axis may represent time, and the vertical axis may represent the voltage of the battery.

[0120] For example, the processor (210) can identify a major section (701) for the development of battery capacity in a charging profile without accelerating the degradation of the battery. For example, the processor (210) can identify a voltage value corresponding to the section (701). For example, the processor (210) can control the battery with a voltage value corresponding to the section (701). For example, the processor (210) can control the charging or discharging of the battery so that the voltage becomes corresponding to the section (701) during the charging and discharging process of the battery.

[0121] FIG. 8 illustrates an example of a dQ / dV graph according to voltage in one embodiment of the present document.

[0122] Referring to FIG. 8, the processor (210) of the battery control device (200) according to one embodiment can obtain data related to dQ / dV according to the voltage of the battery. For example, the processor (210) can represent the data related to dQ / dV according to the voltage of the battery on a graph. For example, in the graph shown in FIG. 8, the horizontal axis may represent the voltage of the battery, and the vertical axis may represent dQ / dV.

[0123] For example, the processor (210) can identify a major section (801) of the battery capacity development without accelerating the degradation of the battery in a graph representing data related to dQ / dV according to the battery voltage.

[0124] For example, the processor (210) can control the battery using a voltage corresponding to the interval (801). For example, the processor (210) can control the battery with a voltage corresponding to the interval (801). For example, the processor (210) can adjust the battery voltage so that it corresponds to the interval (801).

[0125] FIG. 9 illustrates an example of a graph representing the discharge retention of a battery in one embodiment of the present document.

[0126] Referring to FIG. 9, the processor (210) of the battery control device (200) according to one embodiment can provide a function using a battery. For example, the processor (210) can identify the battery life during the process of providing a first function using a battery. For example, the battery life may include the discharge retention of the battery. For example, in the graph of FIG. 9, the horizontal axis may represent the energy output of the battery, and the vertical axis may represent the discharge retention of the battery.

[0127] For example, since the discharge retention of the battery decreases according to the energy output amount, the processor (210) of the battery control device (200) can provide a second function to help improve the battery life when the battery life decreases by a certain amount during the process of providing the first function.

[0128] FIG. 10 illustrates an example of a flowchart related to a battery control method according to one embodiment of the present document.

[0129] In the following, it is assumed that the battery control device (200) of FIG. 2 performs the process of FIG. 10. Also, in the description of FIG. 10, the operation described as being performed by the device can be understood as being controlled by the processor (210) of the battery control device (200).

[0130] At least one of the operations of FIG. 10 may be performed by the battery control device (200) of FIG. 2. At least one of the operations of FIG. 10 may be controlled by the processor (210) of FIG. 2. Each of the operations of FIG. 10 may be performed sequentially, but is not necessarily performed sequentially. For example, the order of each of the operations may be changed, and at least two operations may be performed in parallel.

[0131] Referring to FIG. 10, in operation S1001, a battery control method according to one embodiment may include the operation of obtaining a data map representing at least one factor according to the SOC of the battery based on battery information including at least one factor affecting the lifespan of the battery.

[0132] For example, battery information may include information related to the positive electrode capacity loss of the battery, information related to the negative electrode capacity loss of the battery, information related to the available lithium loss of the battery, or at least one of any combination thereof.

[0133] For example, the data map may include at least one of a first data map expressing a positive capacity loss according to the battery's SOC, a second data map expressing a negative capacity loss according to the battery's SOC, a third data map expressing available lithium loss according to the battery's resistance, a fourth data map expressing the battery's SOH, or any combination thereof.

[0134] In operation S1003, the battery control method according to one embodiment may include an operation of controlling the battery based on identifying the battery life using a data map.

[0135] For example, the battery control method may include the operation of generating a degradation map representing the degradation of the battery based on a data map.

[0136] For example, the battery control method may include operations to control the charge depth of the battery based on a data map, control the temperature of the battery, control the C-rate when charging the battery, or at least one of any combination thereof.

[0137] For example, the battery control method may include an operation of identifying the rate at which the battery life decreases and the battery life using a data map. For example, the battery control method may include an operation of controlling the battery based on the rate at which the battery life decreases and the battery life.

[0138] As another example, the battery control method may include an operation to identify the rate at which the battery's life decreases and the battery's life using a degradation map generated based on a data map.

[0139] A battery control method according to one embodiment may include an operation of identifying the state of the battery. For example, the battery control method may include an operation of identifying the battery life when the battery is in a MoL state. For example, the battery control method may include an operation of identifying whether to provide a first function or a second function using the battery based on identifying the battery life when the battery is in a MoL state.

[0140] A battery control method according to one embodiment may include an operation of identifying an equilibrium peak in the change in capacity of a first battery relative to the change in voltage of a first battery using a data map. For example, when controlling a second battery different from the first battery, the battery control method may include an operation of controlling the second battery to a range less than the interval containing the equilibrium peak.

[0141] For example, the battery control method may include an operation of controlling the battery through DoD control of the battery. For example, the battery control method may include an operation of performing DoD control based on the voltage range in the battery's MoL state and the battery's charging profile.

[0142] FIG. 11 illustrates an example of a graph representing battery retention when controlling a battery using conventional technology.

[0143] Referring to FIG. 11, the graph illustrated in FIG. 11 may include a representation of battery retention during the process of controlling the battery according to different conditions. For example, the different conditions may be related to the SOC intervals for charging and discharging the battery. For example, DoD condition A may include a condition for controlling the battery using the SOC interval for charging and discharging the battery as the first interval.

[0144] For example, DoD condition B may include a condition for controlling the battery by using a second section that includes a minimum value smaller than the minimum value of the first section as the SOC section for charging and discharging the battery.

[0145] For example, DoD condition C may include a condition for controlling the battery by using a third section that includes a minimum value smaller than the minimum value of the second section as the SOC section for charging and discharging the battery.

[0146] For example, the DoD condition D may include a condition for controlling the battery by using a fourth section that includes a minimum value smaller than the minimum value of the third section as the SOC section for charging and discharging the battery.

[0147] For example, the DoD condition E may include a condition for controlling the battery by using a fifth section that includes a minimum value smaller than the minimum value of the fourth section as the SOC section for charging and discharging the battery.

[0148] For example, Ref may include a condition for controlling the battery using an SOC range of 0 to 100% for charging and discharging the battery.

[0149] As can be seen in Figure 11, there is a condition in which the battery retention decreases rapidly under certain conditions.

[0150] FIG. 12 illustrates an example of a graph representing battery retention when a battery is controlled through a battery control device or battery control method according to an embodiment of the present document.

[0151] Referring to FIG. 12, the graph shown in FIG. 12 may include a representation of battery retention when the battery is controlled using the battery control device (200) or battery control method disclosed in this document.

[0152] The percentages shown in FIG. 12 may represent the ratio of increased retention compared to the case where the SOC range for charging and discharging the battery is used as 0 to 100%. As can be seen in FIG. 12, the battery control device (200) or the battery control method can provide the effect of increasing the battery's retention by controlling the SOC range for charging and discharging the battery.

[0153] FIG. 13 illustrates an example of a graph showing that the SOH of a battery increases when the battery is controlled through a battery control device or battery control method according to one embodiment of the present document.

[0154] Referring to FIG. 13, a battery control device (200) according to one embodiment can provide the effect of increasing the SOH of the battery by controlling the function provided through the battery.

[0155] In the graph of FIG. 13, the first section (1301) may include a section where the battery state is in the EoL state. In the graph of FIG. 13, the second section (1303) may include a section where the battery state is in the MoL state. In the graph of FIG. 13, the third section (1305) may include a section where the battery state is in the BoL state.

[0156] As can be seen in the graph of Fig. 13, the battery control device (200) can provide the effect of increasing the battery life, that is, the battery's SOH, by changing the function provided through the battery from the first function to the second function.

[0157] FIG. 14 is a block diagram showing the hardware configuration of a computing system for performing a battery control method in a battery control device and a battery control method according to one embodiment of the present document.

[0158] Referring to FIG. 14, a computing system (1100) according to one embodiment disclosed in this document may include an MCU (1110), memory (1120), input / output I / F (1130) and communication I / F (1140).

[0159] The MCU (1110) may be a processor that executes various programs stored in memory (1120) (e.g., battery cell data collection program, graph calculation program, data analysis program, data decomposition algorithm, normalization program, battery cell diagnosis program, etc.), processes various information including characteristic data and potential variables of the battery cell through these programs, and performs the functions of the battery control device (200) shown in FIGS. 1 to 13.

[0160] The memory (1120) can store various programs such as a battery cell data collection program, a graph generation program, a data analysis program, a data decomposition algorithm, a normalization program, and a battery cell diagnosis program.

[0161] These memories (1120) may be provided in multiple quantities as needed. The memories (1120) may be volatile memories or non-volatile memories. As volatile memories, the memory (1120) may use RAM, DRAM, SRAM, etc. As non-volatile memories, the memory (1120) may use ROM, PROM, EAROM, EPROM, EEPROM, flash memory, etc. The examples of the listed memories (1120) are merely examples and are not limited to these examples.

[0162] The input / output I / F (1130) 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 (1110).

[0163] The communication I / F (1140) 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 control device (200) can transmit and receive various information, including the shape model of a battery cell, from a separately provided external server via the communication I / F (1140).

[0164] 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 recorded in memory (1120) and processed by an MCU (1110).

[0165] As described above, even though all components constituting the embodiments disclosed in this document have been described as being combined or operating in combination, the embodiments disclosed in this document are not necessarily limited to such embodiments. That is, within the scope of the purposes of the embodiments disclosed in this document, all components may be selectively combined in one or more ways to operate.

[0166] Furthermore, terms such as "include," "compose," or "have" as described above, unless specifically stated otherwise, mean that the relevant component may be inherent; thus, they should be interpreted as allowing for the inclusion of additional components rather than excluding them. All terms, 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 pertain, unless otherwise defined. Commonly used terms, such as those defined in advance, should be interpreted in accordance with their contextual meanings in the relevant technology and, unless explicitly defined in this document, should not be interpreted in an ideal or overly formal sense.

[0167] The foregoing disclosure outlines the 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 understand that the present disclosure can be readily used as a basis for designing or modifying other structures to perform the same purpose or achieve the same advantages as the embodiments introduced herein. Furthermore, those skilled in the art will recognize that such equivalent configurations do not depart from the scope of the present disclosure and that various changes, substitutions, and modifications may be made in the present disclosure without departing from the scope of the present disclosure.

Claims

1. Memory in which one or more instructions are stored; and It includes a processor that executes one or more of the above instructions, The above processor is, Based on battery information including at least one factor affecting the lifespan of the battery, a data map indicating the at least one factor according to the state of charge (SOC) of the battery is obtained, and A battery control device configured to control the battery based on identifying the battery life using the above data map.

2. In Paragraph 1, The above battery information is, A battery control device comprising at least one of information related to positive electrode capacity loss of the battery, information related to negative electrode capacity loss of the battery, information related to available lithium loss of the battery, or any combination thereof.

3. In Paragraph 1, The above data map is, A battery control device comprising at least one of a first data map expressing positive capacity loss according to the SOC of the battery, a second data map expressing negative capacity loss according to the SOC of the battery, a third data map expressing available lithium loss according to the resistance of the battery, a fourth data map expressing the SOH (state of health) of the battery, or any combination thereof.

4. In Paragraph 1, The above processor is, A battery control device configured to determine whether to provide a first function or a second function using the battery based on identifying the lifespan of the battery when the battery is in a middle of life (MoL) state.

5. In Paragraph 4, The above processor is, A battery control device configured to provide the second function using the battery based on the fact that the battery's lifespan has decreased to below a specified value during the process of providing the first function using the battery.

6. In Paragraph 1, The above battery is, Includes a first battery, The above processor is, Using the above data map, an equilibrium peak is identified in the change in capacity of the first battery relative to the change in voltage of the first battery, and A battery control device configured to control the second battery to a range including the equilibrium peak or less when controlling a second battery different from the first battery.

7. In Paragraph 1, The above processor is, A battery control device configured to control the battery through DoD (depth of discharge) control of the battery.

8. In Paragraph 7, The above processor is, A battery control device configured to perform DoD control based on the voltage range in the middle of life (MoL) state of the battery and the charging profile of the battery.

9. An operation of obtaining a data map indicating the at least one factor according to the state of charge (SOC) of the battery, based on battery information including at least one factor affecting the battery life by a processor; and A battery control method comprising controlling the battery based on identifying the battery life using the data map by the processor.

10. In Paragraph 9, The above battery information is, A battery control method comprising at least one of information related to a positive electrode capacity loss of the battery, information related to a negative electrode capacity loss of the battery, information related to available lithium loss of the battery, or any combination thereof.

11. In Paragraph 9, The above data map is, A battery control device comprising at least one of a first data map expressing positive capacity loss according to the SOC of the battery, a second data map expressing negative capacity loss according to the SOC of the battery, a third data map expressing available lithium loss according to the resistance of the battery, a fourth data map expressing the SOH (state of health) of the battery, or any combination thereof.

12. In Paragraph 9, The above battery control method is, A battery control method comprising an operation to identify whether to provide a first function or a second function using the battery based on identifying the lifespan of the battery when the battery is in a middle of life (MoL) state by the above processor.

13. In Paragraph 12, The above battery control method is, A battery control method comprising, based on the fact that the battery life has decreased to below a specified value during the process of providing the first function using the battery by the above processor, the operation of providing the second function using the battery.

14. In Paragraph 9, The above battery is, Includes a first battery, The above battery control method is, An operation of identifying an equilibrium peak in the change in capacity of the first battery relative to the change in voltage of the first battery using the data map by the above processor; and A battery control method comprising, when controlling a second battery different from the first battery by the above processor, controlling the second battery to a range including the equilibrium peak or less.

15. In Paragraph 9, The above battery control method is, A battery control method comprising controlling the battery through DoD (depth of discharge) control of the battery by the above processor.

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