Impedance measuring device and method of operation thereof

Abstract

An impedance measuring device according to one embodiment of the present invention includes a plurality of detection modules that detect response signals corresponding to each of a plurality of battery cells, and a control module that calculates impedances corresponding to each of the plurality of battery cells based on the response signals, wherein each of the plurality of detection modules includes a supply unit that supplies an input power source to a corresponding battery cell, and a detection unit that detects the response signal of the corresponding battery cell to the input power source during a detection time, and the control module can adjust the detection time of the plurality of detection modules.

Description

[Technical Field]

[0001] The present invention claims the benefit of priority based on Korean Patent Application No. 10-2022-0106404, filed on August 24, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] FIELD OF THE INVENTION The embodiments disclosed herein relate to an impedance measurement device and method of operation. [Background technology]

[0003] In recent years, research and development into secondary batteries has been actively conducted. Secondary batteries are batteries that can be charged and discharged, and include both conventional Ni / Cd batteries, Ni / MH batteries, and the more recent lithium-ion batteries. Lithium-ion batteries have the advantage of having a much higher energy density than conventional Ni / Cd batteries, Ni / MH batteries, etc. Furthermore, lithium-ion batteries can be manufactured to be compact and lightweight, and are used as power sources for mobile devices. In recent years, their use has expanded to include power sources for electric vehicles, and they are attracting attention as a next-generation energy storage medium.

[0004] Electrochemical Impedance Spectroscopy (ELS) can be used to analyze the state of a battery and detect its operating characteristics over time. ELS can quickly and accurately detect impedance, which is the factor that impedes the transfer of electricity when chemical reactions occur in the electrodes of a battery.

[0005] By detecting the impedance, the battery condition can be quickly evaluated, and based on the evaluation, battery quality inspection, remaining life prediction, and optimization of the charging method according to the battery condition can be performed. Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the embodiments disclosed herein is to provide a measurement device and method of operation that can effectively measure the impedance of multiple battery cells.

[0007] One objective of the embodiments disclosed in this document is to provide a measurement device and an operating method thereof that separates the signal detection times of multiple detection modules included in the impedance measurement device to prevent interference between response signals between adjacent detection modules.

[0008] The technical problems of the embodiments disclosed in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0009] An impedance measuring device according to one embodiment of the present invention includes a plurality of detection modules that detect response signals corresponding to each of a plurality of battery cells, and a control module that calculates impedances corresponding to each of the plurality of battery cells based on the response signals, wherein each of the plurality of detection modules includes a supply unit that supplies an input power source to the corresponding battery cell, and a detection unit that detects the response signal of the corresponding battery cell to the input power source during a detection time, and the control module may be configured to adjust the detection time of the plurality of detection modules.

[0010] According to one embodiment, the control module may classify the plurality of detection modules into a plurality of groups.

[0011] According to one embodiment, the control module may classify the plurality of detection modules into the groups based on an arrangement order.

[0012] According to one embodiment, the control module may set the detection times of the detection modules belonging to the same group among the plurality of detection modules to be the same.

[0013] According to an embodiment, the control module may sequentially set the detection time for each of the groups.

[0014] According to one embodiment, the control module may classify two detection modules arranged adjacent to each other among the plurality of detection modules into different groups.

[0015] According to one embodiment, the control module may classify, among the plurality of detection modules, detection modules having the arrangement order that does not affect the response signals into the same group.

[0016] According to one embodiment, the plurality of detection modules may be arranged at predetermined intervals.

[0017] According to one embodiment, the input power source may be an AC power source.

[0018] An operating method of an impedance measuring device according to another embodiment of the present invention may include the steps of connecting a plurality of battery cells to a plurality of detection modules; a control module adjusting detection times of the plurality of detection modules; a supply unit supplying input power to the battery cells during the detection time; a detection unit detecting the response signal of the battery cell corresponding to the input power during the detection time; and the control module calculating impedances corresponding to each of the plurality of battery cells based on the response signal.

[0019] According to another embodiment, the method of operating the impedance measuring device may further include the step of the control module classifying the plurality of detection modules into a plurality of groups.

[0020] According to another embodiment, the step of classifying the plurality of detection modules into a plurality of groups may be a step in which the control module classifies the detection modules based on an arrangement order of the detection modules.

[0021] According to another embodiment, adjusting the detection time may include the control module sequentially setting the detection time for each of the groups.

[0022] According to another embodiment, the step of classifying based on the arrangement order may be a step of classifying two detection modules arranged adjacent to each other among the plurality of detection modules into different groups.

[0023] According to another embodiment, the step of classifying based on the placement order may be a step of classifying, among the plurality of detection modules, detection modules having a placement order that does not affect the response signal into the same group. [Effects of the Invention]

[0024] The impedance measuring device and its operating method according to an embodiment disclosed herein can prevent distortion of the response signal by adjacent detection modules.

[0025] The detection modules included in the impedance measuring device according to one embodiment disclosed herein can be divided into several groups.

[0026] An impedance measuring device according to an embodiment disclosed herein can adjust the impedance detection time for each group, and can detect signals with reduced influence of noise from adjacent detection modules.

[0027] In addition, various other effects can be provided that can be understood directly or indirectly through this document. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a block diagram illustrating an impedance measurement device according to one embodiment disclosed herein. [Figure 2] FIG. 10 is an exemplary diagram illustrating a table categorizing detection modules into groups according to one embodiment disclosed herein. [Figure 3] 1 is a flowchart illustrating a method of operation of an impedance measurement device according to one embodiment disclosed herein. [Figure 4] 10 is a flowchart illustrating a method of operation of an impedance measurement device according to another embodiment disclosed herein. [Figure 5] FIG. 1 is a block diagram showing the hardware configuration of a computing system for performing a method of operating an impedance measuring device according to one embodiment disclosed herein. DETAILED DESCRIPTION OF THE INVENTION

[0029] Hereinafter, the embodiments disclosed in this document will be described in detail with reference to exemplary drawings. When assigning reference numerals to components in each drawing, it should be noted that the same numerals are assigned to the same components as much as possible even if they are shown in different drawings. Furthermore, when describing the embodiments disclosed in this document, if a detailed description of related known structures or functions is deemed to hinder understanding of the embodiments disclosed in this document, such detailed description will be omitted.

[0030] In describing components of the embodiments disclosed herein, terms such as first, second, A, B, (a), and (b) may be used. These terms are merely used to distinguish one component from another and do not limit the nature, order, or procedure of the components. Furthermore, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which the embodiments disclosed herein pertain. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0031] FIG. 1 is a block diagram illustrating an impedance measurement device according to one embodiment disclosed herein.

[0032] 1, an impedance measuring device 10 according to an embodiment disclosed herein can be connected to a plurality of battery cells 100a, 100b, 100c to 100n. The impedance measuring device 10 may also include a plurality of detection modules 200a, 200b, 200c to 200n connected to the battery cells 100a, 100b, 100c to 100n, respectively, and a control module 300 that controls the detection modules 200a, 200b, 200c to 200n and calculates impedances corresponding to the battery cells 100a, 100b, 100c to 100n, respectively.

[0033] According to the embodiment, the numbers of the battery cells 100a to 100n and the detection modules 200a to 200n can be set arbitrarily.

[0034] The battery cells 100a-100n may be basic units of a battery including a positive electrode, a negative electrode, a separator, and an electrolyte. The battery cells 100a-100n may be samples whose impedances are to be measured, and the impedance measuring device 10 may include multiple detection modules 200a-200n so as to measure the impedances of multiple samples.

[0035] As an example, the impedance measuring device 10 may be an electrochemical impedance spectroscopy device. The electrochemical impedance spectroscopy device may be a device that measures the AC impedance spectrum of a battery cell (e.g., 100a) using a non-destructive testing method. According to an embodiment, the state of deterioration and performance of the battery cell (e.g., 100a) can be estimated by comparing the measured AC impedance spectrum with an equivalent circuit model of the battery cell (e.g., 100a).

[0036] The electrochemical impedance spectroscopy device can measure AC impedance spectra based on changes in the amplitude and phase of response signals detected from the battery cells 100a to 100n by changing the frequency of the alternating current (AC) power supply applied to the battery cells 100a to 100n.

[0037] The impedance measuring device 10 may be connected to battery cells 100a to 100n, the impedance of which is to be measured, via detection modules 200a to 200n. According to an embodiment, one battery cell (e.g., 100a) may be connected to one detection module (e.g., 200a).

[0038] The detection modules 200a to 200n may include a supply unit (eg, 210a) that supplies power to the battery cell (eg, 100a), and a detection unit (eg, 220a) that detects a response signal of the battery cell (eg, 100a).

[0039] According to an embodiment, the detection modules 200a to 200n may be arranged at predetermined intervals, and the predetermined intervals may be reduced as the impedance measuring device 10 is required to be smaller.

[0040] A supply unit (e.g., 210a) included in each of the detection modules 200a to 200n can supply AC power of a preset frequency to the battery cells 100a to 100n connected to the detection modules 200a to 200n, respectively. The frequency of the power supplied by the supply units 210a to 210n may be set by the control module 300. In addition, the control module 300 can set the time when power is supplied by the supply units 210a to 210n and the time when a response signal corresponding to the supplied power is detected for each of the detection modules 200a to 200n.

[0041] According to an embodiment, the supply units 210a to 210n may include a power supply device that can change the frequency and amplitude of the AC power supply.

[0042] The detection units 220a to 220n can detect response signals from the battery cells 100a to 100n connected to the detection modules 200a to 200n, respectively, and transmit the detected response signals to the control module 300. According to the embodiment, the control module 300 can control the detection units 220a to 220n to operate for the detection time. The detection units 220a to 220n can associate the frequencies of the AC power supplied by the supply units 210a to 210n with the response signals output from the battery cells 100a to 100n and transmit them to the control module 300.

[0043] The control module 300 controls the detection modules 200a to 200n to adjust the detection times of the response signals of the battery cells 100a to 100n, and can calculate the impedances corresponding to the battery cells 100a to 100n, respectively, based on the received response signals.

[0044] The control module 300 can calculate impedance based on the frequency of the AC power supply input to each battery cell (e.g., 100a) and the response signal output from the battery cell 100a. The control module 300 can also generate an AC impedance spectrum of each battery cell (e.g., 100a) based on the calculated impedance, and estimate the degradation state and performance of the battery cell (e.g., 100a) by comparing the generated AC impedance spectrum with an equivalent circuit model of the battery cell (e.g., 100a).

[0045] If the supply units (e.g., 210a and 210b) included in adjacent detection modules (e.g., 200a and 200b) supply input power at the same detection time, the AC power input to each battery cell (100a and 100b) may affect the response signal of the adjacent battery cell.

[0046] More specifically, the first supply unit 210a supplies AC power of a preset frequency to the first battery cell 100a as input power, and while the first detection unit 220a detects a response signal corresponding to the AC power, the second supply unit 210b arranged adjacent to the first supply unit 210a can supply AC power to the second battery cell 100b.

[0047] When the second supply unit 210b supplies AC power to the second battery cell 100b, noise may occur in the response signal detected by the first detection unit 220a due to the supplied AC power or the response signal output by the second battery cell 100b in response to the AC power.

[0048] If noise occurs in the response signal, the impedance of the battery cells 100a to 100n may be calculated inaccurately, making it difficult to accurately diagnose the state of the battery cells 100a to 100n. Furthermore, the reliability of the impedance measuring device 10 may not be ensured.

[0049] As an example, the positions of the detection modules 200a to 200n can be adjusted so that the influence of noise between adjacent detection modules (e.g., 200a and 200b) is minimized. However, if a sufficient separation distance is required between the adjacent detection modules (e.g., 200a and 200b), it may be difficult to reduce the size of the impedance measuring device 10.

[0050] According to the embodiment, the control module 300 can classify the plurality of detection modules 200a-200n into a predetermined number of groups. The control module 300 classifies the detection modules 200a-200n based on the arrangement order of the detection modules 200a-200n, and can set the same time for supplying input power and detecting a response signal to the detection modules 200a-200n belonging to the same group. Furthermore, the control module 300 can sequentially set the time for supplying input power and the time for detecting a response signal for each group.

[0051] The plurality of detection modules 200a-200n may be arranged at predetermined intervals. The control module 300 can classify, among the plurality of detection modules 200a-200n arranged at predetermined intervals, detection modules that do not cause distortion of response signals due to noise even when operating simultaneously into the same group. Therefore, detection modules that are adjacent to each other (e.g., 200a and 200b) can be classified into different groups.

[0052] According to the embodiment, the control module 300 can supply a test power supply as an input power supply to the battery cells 100a to 100n for group setting. The control module 300 can supply the test power supply to each of the battery cells 100a to 100n at different timings. The control module 300 can receive a response signal corresponding to the test power supply and calculate a first test impedance of each of the battery cells 100a to 100n.

[0053] The frequency of the test power supply may be a preset value, and the test power supplies supplied to all the battery cells 100a to 100n may have the same frequency.

[0054] The first test impedance is calculated by each of the detection modules 200a to 200n operating independently, and therefore may be a value from which noise generated by adjacent detection modules (for example, 200a and 200b) is eliminated.

[0055] After calculating the first test impedance, the control module 300 can arbitrarily determine, based on the arrangement order, two detection modules from among the detection modules 200a to 200n that will supply test power to the corresponding battery cells.

[0056] For example, the control module 300 can select the first detection module 200a and the second detection module 200b as the detection modules that supply the test power supply, or the control module 300 can select the first detection module 200a and the third detection module 200c as the detection modules that supply the test power supply.

[0057] The control module 300 can supply test power to the battery cells (e.g., 100a and 100b) connected to the selected two detection modules (e.g., 200a and 200b) and detect two response signals corresponding to the test power.

[0058] The control module 300 can calculate a second test impedance based on the response signals received from the two selected detection modules (eg, 200a and 200b).

[0059] The control module 300 can determine whether noise is occurring by comparing the first test impedance and the second test impedance. If the first test impedance and the second test impedance are different, the control module 300 can classify the two selected detection modules into different groups. If the first test impedance and the second test impedance are the same or within a predetermined error range, the control module 300 can classify the two selected detection modules into the same group.

[0060] By calculating the first test impedance and the second test impedance, the control module 300 can detect a detection module that minimizes the influence of noise even when input power of the same frequency is supplied to the battery cell at the same timing.

[0061] The control module 300 classifies detection modules that can minimize the influence of noise into the same group and sets the same detection time, thereby minimizing the noise generated when detecting the impedance of multiple battery cells 100a to 100n while shortening the time required to detect the impedance.

[0062] By arranging the detection modules 200a to 200n at predetermined intervals, the control module 300 can minimize the influence of noise between them or classify detection modules having an arrangement order that does not affect the response signals into the same group.

[0063] The control module 300 can supply a test power supply as an input power supply to the battery cells 100a to 100n and classify the plurality of detection modules 200a to 200b into a plurality of groups, and the number of groups and the number of detection modules belonging to the same group may vary depending on the interval at which the detection modules 200a to 200n are arranged and the distance between the detection modules 200a to 200b at which noise generated during impedance detection is minimized.

[0064] FIG. 2 is an exemplary diagram illustrating a table in which detection modules are classified into groups according to one embodiment disclosed herein.

[0065] FIG. 2 shows an embodiment in which, when there are a total of 20 detection modules, the first to twentieth detection modules are divided into five groups, each of which includes four detection modules.

[0066] For convenience of explanation, it is assumed that the first to twentieth detection modules are arranged in a line, and that the arrangement intervals between adjacent detection modules are constant.

[0067] The table shown in FIG. 2 illustrates an embodiment in which at least four detection modules must be placed between two detection modules to minimize the effect of noise on the detection modules or to prevent them from affecting the response signal.

[0068] The distance at which the influence of noise from adjacent detection modules is minimized can be obtained by the control module (300 in FIG. 1) supplying a test power supply as an input power supply to the battery cells connected to each detection module to calculate a first test impedance, and then supplying the test power supply again to any two of the detection modules to calculate a second test impedance, as described in FIG. 1.

[0069] FIG. 2 shows a table of an example where the detection modules are separated by 5 or more in the placement order so that they belong to the same group.

[0070] The control module (300 in FIG. 1) may set the input power supply time and response signal detection time of the detection modules belonging to the same group to be the same, and the control module (300 in FIG. 1) may set the input power supply and response signal detection to be performed sequentially for each group.

[0071] According to an embodiment, when the detection modules included in the first group (the first detection module, the sixth detection module, the eleventh detection module, and the sixteenth detection module) supply input power to the corresponding battery cells and detect the response signals of the battery cells, the detection modules classified into the second to fifth groups may not supply input power or detect the response signals.

[0072] For example, when the supply of input power and the detection of response signals for the first group are completed, the supply of input power and the detection of response signals for the second group may be performed. The control module (300 in FIG. 1) can control the detection modules so that the supply of input power and the detection of response signals for all groups (first to fifth groups) are performed, and the impedances of all battery cells can be calculated based on the detected response signals.

[0073] FIG. 3 is a flow chart illustrating a method of operation of an impedance measuring device according to one embodiment disclosed herein.

[0074] A plurality of battery cells 100a to 100n can be connected to the impedance measuring device 10 (S100).

[0075] The battery cells 100a to 100n are samples whose impedances are to be measured, and the impedance measuring device 10 may include a plurality of detection modules 200a to 200n connected to the plurality of battery cells 100a to 100n, respectively.

[0076] The control module 300 can classify the plurality of detection modules 200a to 200n into a preset number of groups (S200).

[0077] The control module 300 can classify the detection modules 200a to 200n into a plurality of groups based on their arrangement order. As an example, two adjacent detection modules (e.g., 200a and 200b) can be classified into different groups.

[0078] The method by which the control module 300 classifies the detection modules 200a to 200n will be described with reference to FIG.

[0079] The control module 300 can adjust the detection time for each of the plurality of detection modules 200a to 200n (S300). The detection time can refer to the time required to detect a response signal from the battery cells 100a to 100b connected to the detection modules 200a to 200n to the input power source.

[0080] According to the embodiment, the control module 300 can set the same detection time for the detection modules belonging to the same group.

[0081] When adjusting the detection times of the plurality of detection modules, the control module 300 may set each group to have a sequential detection time.

[0082] By having sequential detection times for each group, detection modules belonging to different groups can be prevented from operating at the same timing.

[0083] The control module 300 can cause a supply unit (e.g., 210a) included in the detection module (e.g., 200a) to supply input power to a battery cell (e.g., 100a) connected to the detection module (e.g., 200a) (S400).

[0084] The input power source may be an AC power source having a preset frequency and amplitude.

[0085] The detection unit (e.g., 220a) detects a response signal of a battery cell (e.g., 100a) corresponding to the input power source for a detection time (S500), and can transmit the frequency of the input power source to the control module 300 in correspondence with the response signal.

[0086] The control module 300 can calculate the impedances corresponding to the plurality of battery cells 100a to 100n, respectively, based on the response signals (S600).

[0087] According to the embodiment, the control module 300 can calculate the impedance for each of the battery cells 100a to 100n with respect to the input frequency and generate an AC impedance spectrum based on the calculated impedance. The control module 300 can diagnose the degradation state and performance of the battery cells 100a to 100n by comparing the generated AC impedance spectrum with an equivalent circuit model of the battery cells 100a to 100n.

[0088] FIG. 4 is a flow chart illustrating a method of operation of an impedance measuring device according to another embodiment disclosed herein.

[0089] A method by which the control module 300 classifies the detection modules 200a to 200n into a plurality of groups in order to prevent noise that may occur between adjacent detection modules 200a to 200n will be specifically described with reference to FIG.

[0090] After the plurality of battery cells 100a to 100n are connected to the impedance measuring device 10 (FROM S100), the control module 300 can control the supply units 210a to 210n to supply test power to each of all the battery cells 100a to 100n (S210).

[0091] The test power supply may be a power supply having a preset frequency.

[0092] The test power may be supplied to each of the battery cells 100a to 100n at different timings.

[0093] The control module 300 can receive the response signals of the battery cells 100a to 100n corresponding to the test power supplies from the detection modules 200a to 200n.

[0094] The control module 300 can calculate the first test impedance of each of the battery cells 100a to 100n based on the received response signal (S220).

[0095] The first test impedance is calculated based on the response signals detected by the respective detection modules 200a to 200n operating at different timings, and therefore may be a value that is free from the influence of noise that adjacent detection modules (e.g., 200a and 200b) have on each other.

[0096] After calculating the first test impedance, the control module 300 can determine any two detection modules among the detection modules 200a to 200n that will supply test power to the corresponding battery cells (S230). According to the embodiment, the control module 300 can initially select detection modules that are close to each other, and as the determination of the detection modules is repeated, it can gradually select detection modules that are farther apart.

[0097] The control module 300 can cause the selected two detection modules to supply test power to the corresponding battery cells via the supply unit, where the test power may be supplied to the corresponding two battery cells simultaneously.

[0098] The control module 300 can calculate the second test impedances of the two battery cells based on the response signals detected by the two detection modules (S240).

[0099] The second test impedance is a value calculated when the two detection modules are operating simultaneously, and therefore may be a value that reflects the influence of noise on each other that the two selected detection modules have.

[0100] The control module 300 may compare whether the first test impedance and the second test impedance of each battery cell are within a preset error range (S250). If the first test impedance and the second test impedance are within the preset error range (YES path of S250), the control module 300 may classify the two selected detection modules into the same group (S260).

[0101] According to an embodiment, if the first test impedance and the second test impedance are within a preset error range, the control module 300 can be used to select another detection module for calculating the second test impedance using the distance and arrangement order of the two selected detection modules.

[0102] The control module 300 can classify the detection modules 200a to 200n, whose first test impedance and second test impedance are within a preset error range and whose arrangement order is least different between the detection modules, into the same group.

[0103] In addition, the control module 300 can detect the detection module whose first test impedance and second test impedance are within a predetermined error range and whose difference in arrangement order between the detection modules is the smallest, and then classify the detection modules 200a to 200n by applying group classification based on the arrangement order between the two detection modules to all the detection modules 200a to 200n.

[0104] If the first test impedance and the second test impedance are outside the preset error range (NO path of S250), the control module 300 can again determine two detection modules for calculating the second test impedance (S230).

[0105] FIG. 5 is a block diagram showing the hardware configuration of a computing system for performing the method of operating the impedance measuring device according to one embodiment disclosed herein.

[0106] Referring to FIG. 5, a computing system 1000 according to one embodiment disclosed herein may include an MCU 1010, a memory 1020, an input / output I / F 1030, and a communication I / F 1040.

[0107] According to one embodiment, the computing system 1000 may be a system for performing the operations of the control module 300 or the detection module (eg, 200a) described above.

[0108] The MCU 1010 may be a processor that executes various programs stored in the memory 1020 .

[0109] For example, the MCU 1010 can process voltage, current data, control signals, etc., required by the control module 300 to manage and control the detection modules (eg, 200a).

[0110] The MCU 1010 may be a processor that processes data and / or signals. For example, the MCU 1010 may adjust the current supplied to the battery cell (e.g., 100a) so that the detection module (e.g., 200a) can detect the response signal of the battery cell (e.g., 100a). The MCU 1010 may also be a processor that performs impedance calculations based on information output from the battery pack 100.

[0111] The memory 1020 can store various programs required for the control module 300 to manage and control the battery cells (e.g., 100a) and the detection module (e.g., 200a). The memory 1020 can also store various programs required for the control module 300 to calculate impedance.

[0112] For example, the memory 1020 can store response signals such as voltage, current, and characteristic value data of each battery cell (e.g., 100a). The memory 1020 can also store a program for calculating impedance based on the voltage, current, and characteristic value data. A plurality of memories 1020 may be provided as needed.

[0113] The memory 1020 may be a volatile memory or a non-volatile memory. The memory 1020 as a volatile memory may be a RAM, a DRAM, an SRAM, etc. The memory 1020 as a non-volatile memory may be a ROM, a PROM, an EAROM, an EPROM, an EEPROM, a flash memory, etc. The examples of the memory 1020 listed above are merely illustrative and are not limited to these examples.

[0114] The input / output I / F 1030 can provide an interface that connects input devices (not shown) such as a keyboard, mouse, or touch panel and output devices such as a display (not shown) to the MCU 1010, enabling data to be sent and received.

[0115] The communication I / F 1040 is configured to be able to transmit and receive various data to and from a server, and may be any of various devices that support wired or wireless communication. For example, a program for detecting the impedance of the battery cell 110 and various data can be transmitted and received from a separately provided external server via the communication I / F 1040.

[0116] In this way, the computer program according to one embodiment disclosed in this document may be recorded in memory 1020 and realized as a module that performs each of the operations shown in Figures 1 to 4 described above by being processed by MCU 1010.

[0117] The above description is merely an illustrative example of the technical ideas disclosed in this document, and a person having ordinary knowledge in the technical field to which the embodiments disclosed in this document belong may make various modifications and variations without departing from the essential characteristics of the embodiments disclosed in this document.

[0118] Therefore, the embodiments disclosed in this document are intended to illustrate, not limit, the technical ideas disclosed in this document, and such embodiments do not limit the scope of the technical ideas disclosed in this document. The scope of protection of the technical ideas disclosed in this document should be interpreted by the scope of the attached claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of rights of this document.

Claims

1. a plurality of detection modules for detecting response signals corresponding to the plurality of battery cells; a control module that calculates impedances corresponding to the plurality of battery cells based on the response signals; Each of the plurality of detection modules a supply unit for supplying input power to a corresponding battery cell; a detection unit configured to detect the response signal of the corresponding battery cell to the input power source for a detection time; The control module adjusts the detection times of the plurality of detection modules.

2. The impedance measuring device according to claim 1 , wherein the control module classifies the plurality of detection modules into a plurality of groups.

3. The impedance measuring device according to claim 2 , wherein the control module classifies the plurality of detection modules into the plurality of groups based on an arrangement order.

4. The impedance measuring device according to claim 2 , wherein the control module sets the detection time of all the detection modules belonging to the same group to be the same.

5. The impedance measuring device according to claim 2 , wherein the control module sequentially sets the detection time for each group.

6. The impedance measuring device according to claim 3 , wherein the control module classifies two detection modules arranged adjacent to each other among the plurality of detection modules into different groups.

7. 4. The impedance measuring device according to claim 3, wherein the control module classifies, into the same group, the detection modules having the arrangement order that does not affect the response signal, among the plurality of detection modules.

8. The impedance measuring device according to claim 1 , wherein the plurality of detection modules are arranged at predetermined intervals.

9. 2. The impedance measuring device according to claim 1, wherein the input power source is an AC power source.

10. connecting a plurality of battery cells to a plurality of detection modules; a control module adjusting detection times of the plurality of detection modules; a supply unit supplying input power to the plurality of battery cells for the detection time; a detection unit detecting a response signal of a battery cell corresponding to the input power source for the detection time; and the control module calculating impedances corresponding to the plurality of battery cells based on the response signals.

11. The method of operating an impedance measuring device of claim 10 , further comprising the step of the control module classifying the plurality of detection modules into a plurality of groups.

12. The method of claim 11 , wherein the step of adjusting the detection time includes the step of the control module sequentially setting the detection time for each group.

13. 12. The method for operating an impedance measuring device according to claim 11, wherein the step of classifying the plurality of detection modules into a plurality of groups is a step of the control module classifying the plurality of detection modules based on an arrangement order of the plurality of detection modules.

14. 14. The method for operating an impedance measuring device according to claim 13, wherein the step of classifying based on the arrangement order is a step of classifying two detection modules arranged adjacent to each other among the plurality of detection modules into different groups.

15. 14. The method for operating an impedance measuring device according to claim 13, wherein the step of classifying based on the arrangement order is a step of classifying, among the plurality of detection modules, detection modules having an arrangement order that does not affect the response signal into the same group.

Images