Battery management device and method thereof

Abstract

A battery management device according to one embodiment disclosed in this document may include a data acquisition unit that acquires characteristic information and log data regarding at least one battery cell, and a processor that calculates an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data, and measures the remaining capacity of the at least one battery cell based on the energy increase.

Description

Technology Field

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

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

[0003] Generally, lithium-ion batteries are implemented using multiple battery cells to supply power. To realize high-quality and high-efficiency products, it is important to accurately know the remaining capacity of the lithium-ion battery. However, due to chemical differences, physical properties, aging levels, and weather conditions, multiple battery cells cause variations in charge / discharge times and amounts for each individual cell.

[0004] Therefore, the problem of accurately measuring the remaining capacity of each battery cell has recently emerged as a significant technical issue. The problem to be solved

[0005] One objective of the embodiments disclosed in this document is to provide a battery management device and a method capable of accurately measuring the remaining capacity of each battery cell using an energy increase relative to a target State of Charge (SOC).

[0006] In addition, one objective of the embodiments disclosed in this document is to provide a battery management device and a method capable of stably managing the lifespan of a battery containing battery cells by accurately measuring the remaining capacity of each battery cell.

[0007] The technical problems of the embodiments disclosed in this document are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0008] A battery management device according to one embodiment disclosed in this document may include a data acquisition unit that acquires characteristic information and log data regarding at least one battery cell, and a processor that calculates an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data, and measures the remaining capacity of the at least one battery cell based on the energy increase.

[0009] In one embodiment, the characteristic information may be characterized by including information regarding the capacity deviation of the at least one battery cell.

[0010] In one embodiment, the processor can calculate the energy increase based on the capacity deviation.

[0011] In one embodiment, the log data may include data for at least one of the operating SOC, depth of discharge (DOD), and discharge amount of the at least one battery cell.

[0012] In one embodiment, the processor can calculate the energy increase if the operating SOC is lower than the target SOC.

[0013] In one embodiment, the processor can calculate the energy ratio per interval of the depth of discharge (DOD) and calculate the energy increase based on the calculated energy ratio.

[0014] In one embodiment, the processor can calculate the energy increase if the operating SOC is higher than a specified value.

[0015] In one embodiment, the processor can calculate the difference between the target SOC and the operating SOC, and measure the remaining capacity using the calculated result and the discharge amount.

[0016] In one embodiment, the processor can measure the remaining capacity of a battery containing at least one battery cell using the remaining capacity of at least one battery cell.

[0017] A method of operation of a battery management device according to one embodiment disclosed in this document may include the steps of: acquiring characteristic information and log data regarding at least one battery cell; calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data; and measuring the remaining capacity of the at least one battery cell based on the energy increase.

[0018] In one embodiment, the characteristic information may include information regarding the capacity deviation of the at least one battery cell.

[0019] In one embodiment, the step of calculating the energy increase for the target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data may calculate the energy increase based on the capacity deviation.

[0020] In one embodiment, the log data may include data for at least one of the operating SOC, depth of discharge (DOD), and discharge amount of the at least one battery cell.

[0021] In one embodiment, the step of calculating an energy increase for a target State of Charge (SOC) of at least one battery cell based on the characteristic information and the log data can calculate the energy increase if the operating SOC is lower than the target SOC.

[0022] In one embodiment, the step of calculating an energy increase for a target State of Charge (SOC) of at least one battery cell based on the characteristic information and the log data may calculate an energy ratio per interval of the depth of discharge (DOD) and calculate the energy increase based on the calculated energy ratio.

[0023] In one embodiment, the step of calculating an energy increase for a target State of Charge (SOC) of at least one battery cell based on the characteristic information and the log data can calculate the energy increase if the operating SOC is higher than a specified value.

[0024] In one embodiment, the step of calculating an energy increase for a target State of Charge (SOC) of at least one battery cell based on the characteristic information and the log data calculates the difference between the target SOC and the operating SOC, and the step of measuring the remaining capacity of at least one battery cell based on the energy increase can measure the remaining capacity using the calculated result and the discharge amount.

[0025] In one embodiment, the method of operating the battery management device may further include the step of measuring the remaining capacity of a battery containing at least one battery cell using the remaining capacity of at least one battery cell. Effects of the invention

[0026] The battery management device and method according to the embodiments disclosed in this document can accurately measure the remaining capacity of each battery cell.

[0027] In addition, the battery management device and method according to the embodiments disclosed in this document can accurately measure the remaining capacity of each battery cell and stably manage the lifespan of a battery containing the battery cells.

[0028] A battery management device according to the embodiments disclosed in this document can accurately measure the remaining capacity of each battery cell using the energy increase for the target State of Charge (SOC). Brief explanation of the drawing

[0029] FIG. 1 is a conceptual drawing showing a battery management system according to one embodiment disclosed in this document. FIG. 2 is a block diagram showing a battery management device according to one embodiment disclosed in this document. FIG. 3 is a drawing for explaining the operation of a battery management device according to one embodiment disclosed in this document. FIG. 4 is a flowchart showing the operation method of a battery management device according to one embodiment disclosed in this document. FIG. 5 is a drawing showing a computing system according to another embodiment disclosed in this document. Specific details for implementing the invention

[0030] The embodiments disclosed in this document are described in detail below with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments disclosed in this document, if it is determined that a detailed description of related known configurations or functions would hinder understanding of the embodiments disclosed in this document, such detailed description is omitted.

[0031] In describing the components of the embodiments disclosed in this document, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended only to distinguish the components from other components and do not limit the essence, order, or sequence of the components. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the embodiments disclosed in this document belong. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0032] FIG. 1 is a conceptual drawing showing a battery management system according to one embodiment disclosed in this document.

[0033] Referring to FIG. 1, the battery management system (1000) may be configured to include a battery management device (100), etc. However, this is merely a preferred embodiment for achieving the purpose of the present invention, and it is understood that some components may be added or removed as needed. Furthermore, it should be noted that each component of the battery management system (1000) illustrated in FIG. 1 represents functionally distinct functional elements, and that multiple components may be implemented in a form that integrates with one another in an actual physical environment.

[0034] In the battery management system (1000), the battery management device (100) is a computing device capable of providing battery management services to a user by measuring the remaining capacity of a plurality of battery cells (10, 20, 30) and providing it to the user. Here, the computing device may be a notebook, desktop, laptop, etc., but is not limited thereto and may include all types of devices equipped with computing functions and communication functions. However, if battery management services are to be provided to a plurality of users, it may be desirable for the battery management device (100) to be implemented as a high-performance server computing device.

[0035] The battery management device (100) can obtain various data from the battery cells (10, 20, 30). According to an embodiment, the various data obtained can be used by the battery management device (100) to measure the remaining capacity of each battery cell (10, 20, 30). For example, the battery management device (100) can obtain characteristic information and log data from at least one battery cell (10, 20, 30).

[0036] Characteristic information may refer to information regarding the characteristics of each battery cell. Characteristic information may include information regarding the capacity variation of the battery cell. Log data may refer to data regarding the operation of each battery cell. Log data may include data regarding at least one of the operating State of Charge (SOC), Depth of Discharge (DOD), and Discharge Amount.

[0037] According to an embodiment of the present invention, a battery management device (100) can obtain characteristic information and log data for battery cells (10, 20, 30) through various wired or wireless networks.

[0038] The battery management device (100) can calculate an energy increase for the target SOC (State of Charge) of each battery cell (10, 20, 30) using acquired characteristic information and log data, and measure the remaining capacity of each battery cell (10, 20, 30) based on the calculated energy increase.

[0039] The battery management device (100) can measure the remaining capacity of a battery containing battery cells (10, 20, 30) using the remaining capacity of each measured battery cell (10, 20, 30).

[0040] In the battery management system (1000), the user terminal (300) is a terminal of a user that receives battery management services. The battery management device (100) can display characteristic information, log data, and remaining capacity of each battery cell (10, 20, 30) through the user terminal (300).

[0041] The components of the battery management system (1000) can communicate through a network. Here, the network can be implemented as any kind of wired or wireless network, such as a Local Area Network (LAN), a Wide Area Network (WAN), a mobile radio communication network, or Wibro (Wireless Broadband Internet).

[0042] Up to now, a battery management system (1000) according to an embodiment of the present invention has been described with reference to FIG. 1. Below, the configuration and operation of a battery management device (100) according to an embodiment of the present invention will be described using FIGs. 2 to 5.

[0043] FIG. 2 is a block diagram showing a battery management device according to one embodiment of the present document. FIG. 3 is a drawing for explaining the operation of a battery management device according to one embodiment disclosed in the present document.

[0044] Referring to FIG. 2, a battery management device (100) according to one embodiment disclosed in this document may include a data acquisition unit (110) and a processor (120).

[0045] The data acquisition unit (110) can acquire characteristic information and log data regarding at least one battery cell (10, 20, 30). According to an embodiment, the data acquisition unit (110) can acquire characteristic information including capacity deviation of at least one battery cell (10, 20, 30).

[0046] According to an embodiment, the data acquisition unit (110) may acquire log data including at least one of an operating State of Charge (SOC), depth of discharge (DOD), and amount of discharge. The data acquisition unit (100) may acquire specific information and log data from battery cells (10, 20, 30), but is not limited thereto.

[0047] According to an embodiment, the data acquisition unit (110) can acquire characteristic information and log data regarding at least one battery cell (10, 20, 30) at a specified time. By the data acquisition unit (110) acquiring characteristic information and log data at a specified time, the battery cell (10, 20, 30) can be managed at a constant period.

[0048] The data acquisition unit (110) can transmit the acquired characteristic information and log data to the processor (120).

[0049] The processor (120) can calculate the energy increase for the target State of Charge (SOC) of each battery cell (10, 20, 30) based on characteristic information and log data.

[0050] According to an embodiment, the processor (120) can calculate an energy increase when the operating SOC is lower than the target SOC. By calculating the energy increase when the operating SOC is lower than the target SOC, the processor (120) can increase efficiency by calculating the energy increase only for days when it is discharged without being charged to the target SOC due to the influence of weather or other factors.

[0051] According to an embodiment, the processor (120) can calculate an energy ratio per interval of depth of discharge (DOD) and calculate an energy increase based on the calculated energy ratio. As the processor (120) subdivides the interval of the depth of discharge, the accuracy of the calculated energy increase may increase.

[0052] According to an embodiment, the processor (120) can calculate an energy increase when the operating SOC is higher than a specified value. Since the battery cell has the characteristic of having more energy in the higher range than in the lower range of the SOC value, the processor (120) can increase computational efficiency by calculating the energy increase only when the operating SOC is higher than a specified value.

[0053] Referring to FIG. 3, a detailed explanation will be provided. Referring to FIG. 3, when calculating the energy ratio per 5% of discharge depth, a higher SOC value can yield a greater amount of energy. Additionally, in the range where the SOC value is higher than A, additional capacity may be generated. According to an embodiment, the processor (120) can calculate an increase in energy if the operating SOC of the battery cells (10, 20, 30) is higher than a specified value (A).

[0054] Referring again to FIG. 2, the processor (120) can measure the remaining capacity of each battery cell (10, 20, 30) based on the increase in energy.

[0055] According to an embodiment, the processor (120) can calculate the difference between the target SOC and the operating SOC, and measure the remaining capacity of the battery cells (10, 20, 30) using the calculated result and the discharge amount. For example, the processor (120) can measure the remaining capacity of the battery cells (10, 20, 30) using the result of multiplying the difference between the target SOC and the operating SOC by the discharge amount.

[0056] According to an embodiment, the processor (120) can measure the remaining capacity of at least one battery cell (10, 20, 30) by weighting the energy increase. For example, the processor (120) can weight the energy increase based on characteristic information of at least one battery cell (10, 20, 30).

[0057] The processor (120) can measure the remaining capacity of the battery containing the battery cells (10, 20, 30) using the remaining capacity of the measured battery cells (10, 20, 30).

[0058] FIG. 4 is a flowchart showing the operation method of a battery management device according to one embodiment disclosed in this document.

[0059] Referring to FIG. 4, a method of operation of a battery management device according to one embodiment disclosed in this document may include the step of obtaining characteristic information and log data regarding at least one battery cell (S110), the step of calculating an energy increase for a target SOC of at least one battery cell based on the characteristic information and log data (S120), and the step of measuring the remaining capacity of at least one battery cell based on the energy increase (S130).

[0060] Steps S110 to S130 are described in detail below with reference to FIGS. 1 and FIG. 2.

[0061] In step S110, the data acquisition unit (110) can acquire characteristic information and log data regarding at least one battery cell (10, 20, 30). The data acquisition unit (110) can acquire information regarding capacity deviation of at least one battery cell (10, 20, 30) and data regarding at least one of operating SOC, depth of discharge (DOD), and discharge amount. The data acquisition unit (100) can acquire specific information and log data from the battery cell (10, 20, 30), but is not limited thereto.

[0062] In step S120, the processor (120) can calculate an energy increase for the target SOC of at least one battery cell (10, 20, 30) based on characteristic information and log data.

[0063] According to an embodiment, the processor (120) can calculate an energy increase when the operating SOC is lower than the target SOC. By calculating the energy increase when the operating SOC is lower than the target SOC, the processor (120) can increase efficiency by calculating the energy increase only for days when it is discharged without being charged to the target SOC due to the influence of weather or other factors.

[0064] According to an embodiment, the processor (120) can calculate an energy ratio per interval of depth of discharge (DOD) and calculate an energy increase based on the calculated energy ratio. As the processor (120) subdivides the interval of the depth of discharge, the accuracy of the calculated energy increase may increase.

[0065] According to an embodiment, the processor (120) can calculate an energy increase when the operating SOC is higher than a specified value. Since the battery cell has the characteristic of having more energy in the higher range than in the lower range of the SOC value, the processor (120) can increase computational efficiency by calculating the energy increase only when the operating SOC is higher than a specified value.

[0066] In step S130, the processor (120) can measure the remaining capacity of at least one battery cell (10, 20, 30) based on the energy increase.

[0067] According to an embodiment, the processor (120) can calculate the difference between the target SOC and the operating SOC, and measure the remaining capacity of the battery cells (10, 20, 30) using the calculated result and the discharge amount. For example, the processor (120) can measure the remaining capacity of the battery cells (10, 20, 30) using the result of multiplying the difference between the target SOC and the operating SOC by the discharge amount.

[0068] According to an embodiment, the processor (120) can measure the remaining capacity of at least one battery cell (10, 20, 30) by weighting the energy increase. For example, the processor (120) can weight the energy increase based on characteristic information of at least one battery cell (10, 20, 30).

[0069] The processor (120) can measure the remaining capacity of the battery containing the battery cells (10, 20, 30) using the remaining capacity of the measured battery cells (10, 20, 30).

[0070] FIG. 5 is a drawing showing a computing system according to another embodiment disclosed in this document.

[0071] Referring to FIG. 5, a computing system (200) according to one embodiment disclosed in this document may include an MCU (210), memory (220), an input / output I / F (230), and a communication I / F (240).

[0072] The MCU (210) may be a processor that executes various programs stored in memory (220) (e.g., energy increase calculation program, remaining capacity measurement program, etc.), processes various data including SOC, SOH, etc. of multiple battery cells through these programs, and performs the functions of the battery management device (100) described with reference to FIG. 1 and FIG. 2, or a processor that executes the battery management method described with reference to FIG. 4.

[0073] The memory (220) can store various programs related to the calculation of the energy increase of the battery cell and the measurement of the remaining capacity. In addition, the memory (220) can store various data such as SOC data and log data for each battery cell.

[0074] These memories (220) may be provided in multiple quantities as needed. The memories (220) may be volatile memories or non-volatile memories. As volatile memories, the memory (220) may use RAM, DRAM, SRAM, etc. As non-volatile memories, the memory (220) may use ROM, PROM, EAROM, EPROM, EEPROM, flash memory, etc. The examples of the listed memories (220) are merely examples and are not limited to these examples.

[0075] The input / output I / F (230) 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 (210).

[0076] The communication I / F (230) is configured to transmit and receive various data to and from a server and may be various devices capable of supporting wired or wireless communication. For example, through the communication I / F (230), programs for calculating the increase in energy of a battery cell or measuring remaining capacity, or various data, can be transmitted and received from a separately provided external server.

[0077] As such, a battery management method according to one embodiment disclosed in this document can be recorded in memory (220) and executed by an MCU (210).

[0078] The above description is merely an illustrative explanation of the technical concept disclosed in this document, and a person skilled in the art to which the embodiments disclosed in this document belong may make various modifications and variations within the scope of the essential characteristics of the embodiments disclosed in this document.

[0079] Accordingly, the embodiments disclosed in this document are intended to illustrate, not limit, the technical concept disclosed in this document, and the scope of the technical concept disclosed in this document is not limited by these embodiments. The scope of protection of the technical concept disclosed in this document shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of this document.

Claims

Claim 1 A battery management device comprising: a data acquisition unit for acquiring characteristic information and log data regarding at least one battery cell; and a processor for calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data, and measuring the remaining capacity of the at least one battery cell based on the energy increase, wherein the log data includes data for at least one of the operating SOC, depth of discharge (DOD), and discharge amount of the at least one battery cell, and wherein the processor calculates the energy increase if the operating SOC is lower than the target SOC. Claim 2 A battery management device according to claim 1, characterized in that the characteristic information includes information regarding the capacity deviation of at least one battery cell. Claim 3 A battery management device according to claim 2, characterized in that the processor calculates the energy increase based on the capacity deviation. Claim 4 delete Claim 5 delete Claim 6 A battery management device comprising: a data acquisition unit for acquiring characteristic information and log data regarding at least one battery cell; and a processor for calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data, and measuring the remaining capacity of the at least one battery cell based on the energy increase, wherein the log data includes data for at least one of the operating SOC, depth of discharge (DOD), and discharge amount of the at least one battery cell, and the processor calculates an energy ratio per interval of the depth of discharge (DOD) and calculates the energy increase based on the calculated energy ratio. Claim 7 A battery management device comprising: a data acquisition unit for acquiring characteristic information and log data regarding at least one battery cell; and a processor for calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data, and measuring the remaining capacity of the at least one battery cell based on the energy increase, wherein the log data includes data for at least one of the operating SOC, depth of discharge (DOD), and discharge amount of the at least one battery cell, and wherein the processor calculates the energy increase if the operating SOC is higher than a specified value. Claim 8 A battery management device comprising: a data acquisition unit for acquiring characteristic information and log data regarding at least one battery cell; and a processor for calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data, and measuring the remaining capacity of the at least one battery cell based on the energy increase, wherein the log data includes data for at least one of the operating SOC, depth of discharge (DOD), and discharge amount of the at least one battery cell, and wherein the processor calculates the difference between the target SOC and the operating SOC, and measures the remaining capacity using the calculated result and the discharge amount. Claim 9 A battery management device according to claim 1, wherein the processor measures the remaining capacity of a battery containing at least one battery cell using the remaining capacity of at least one battery cell. Claim 10 A method of operation of a battery management device comprising: a step of acquiring characteristic information and log data regarding at least one battery cell; a step of calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data; and a step of measuring the remaining capacity of the at least one battery cell based on the energy increase, wherein the log data includes data for at least one of the operating SOC, depth of discharge (DOD), and discharge amount of the at least one battery cell, and the step of calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data is characterized by calculating the energy increase if the operating SOC is lower than the target SOC. Claim 11 A method of operation of a battery management device according to claim 10, characterized in that the characteristic information includes information regarding the capacity deviation of at least one battery cell. Claim 12 A method of operation of a battery management device according to claim 11, wherein the step of calculating an energy increase for a target SOC (State of Charge) of at least one battery cell based on the characteristic information and the log data is characterized by calculating the energy increase based on the capacity deviation. Claim 13 delete Claim 14 delete Claim 15 A method of operation of a battery management device comprising: a step of acquiring characteristic information and log data regarding at least one battery cell; a step of calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data; and a step of measuring the remaining capacity of the at least one battery cell based on the energy increase, wherein the log data includes data for at least one of the operating SOC, depth of discharge (DOD), and discharge amount of the at least one battery cell, and the step of calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data comprises calculating an energy ratio per interval of the depth of discharge (DOD) and calculating the energy increase based on the calculated energy ratio. Claim 16 A method of operation of a battery management device comprising: a step of obtaining characteristic information and log data regarding at least one battery cell; a step of calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data; and a step of measuring the remaining capacity of the at least one battery cell based on the energy increase, wherein the log data includes data for at least one of the operating SOC, depth of discharge (DOD), and discharge amount of the at least one battery cell, and the step of calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data is characterized by calculating the energy increase if the operating SOC is higher than a specified value. Claim 17 A method of operation of a battery management device comprising: a step of acquiring characteristic information and log data regarding at least one battery cell; a step of calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data; and a step of measuring the remaining capacity of the at least one battery cell based on the energy increase, wherein the log data includes data for at least one of the operating SOC, depth of discharge (DOD), and discharge amount of the at least one battery cell, and the step of calculating an energy increase for a target State of Charge (SOC) of the at least one battery cell based on the characteristic information and the log data calculates the difference between the target SOC and the operating SOC, and the step of measuring the remaining capacity of the at least one battery cell based on the energy increase measures the remaining capacity using the calculated result and the discharge amount. Claim 18 A method of operation of a battery management device according to claim 10, further comprising the step of measuring the remaining capacity of a battery containing at least one battery cell using the remaining capacity of at least one battery cell.

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