Impedance measuring device and operation method thereof

Abstract

An impedance measuring apparatus according to one embodiment of the present disclosure includes: a plurality of detection modules configured to detect response signals respectively corresponding to a plurality of battery cells; and a control module configured to calculate impedances respectively corresponding to the plurality of battery cells based on the response signal, in which each of the plurality of detection modules includes: a supply unit configured to supply input power to the corresponding battery cell; and a detection unit configured to detect a response signal of the corresponding battery cell to the input power during a detection time, and the control module is further configured to adjust the detection time for the plurality of detection modules.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2022-0106404 filed in the Korean Intellectual Property Office on August 24, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Embodiments disclosed herein relate to an impedance measurement device and an operating method thereof. Background Art

[0004] Recently, research and development of secondary batteries have been actively conducted. Secondary batteries as rechargeable / dischargeable batteries may include all conventional nickel (Ni) / cadmium (Cd) batteries, Ni / metal hydride (MH) batteries, etc., and more recently, lithium-ion batteries. The energy density of lithium-ion batteries is much higher than that of conventional Ni / Cd batteries, Ni / MH batteries, etc. In addition, lithium-ion batteries can be made small and lightweight, so that lithium-ion batteries have been used as power sources for mobile devices, and recently, their use range has been expanded to power sources for electric vehicles, and they have attracted much attention as the next generation energy storage medium.

[0005] In order to analyze the state of the battery and detect the operating characteristics of the battery over time, electrochemical impedance spectroscopy can be used. Electrochemical impedance spectroscopy can quickly and accurately detect impedance, which is a factor that hinders power transmission when a chemical reaction occurs at an electrode included in a battery.

[0006] The state of the battery can be quickly evaluated by detecting the impedance, and the battery quality can be checked, the remaining life can be predicted, and the charging method corresponding to the state of the battery can be optimized based on the evaluation. Summary of the invention

[0007] Technical issues

[0008] The embodiments disclosed herein are directed to providing a measuring device capable of effectively measuring the impedance of a plurality of battery cells and an operating method thereof.

[0009] The embodiments disclosed herein are intended to provide a measuring device and an operating method of the measuring device, wherein the measuring device separates signal detection times of a plurality of detection modules included in an impedance measurement device to prevent response signal interference between adjacent detection modules.

[0010] Technical problems of the embodiments disclosed herein are not limited to the above-mentioned technical problems, and other unmentioned technical problems will be clearly understood by those of ordinary skill in the art from the following description.

[0011] Technical Solution

[0012] According to one embodiment of the present disclosure, an impedance measurement device includes: a plurality of detection modules, which are configured to detect response signals corresponding to a plurality of battery cells respectively; and a control module, which is configured to calculate impedances corresponding to the plurality of battery cells respectively based on the response signals, wherein each of the plurality of detection modules includes: a supply unit, which is configured to supply input power to the corresponding battery cell; and a detection unit, which is configured to detect the response signal of the corresponding battery cell to the input power during a detection time, and the control module is further configured to adjust the detection time for the plurality of detection modules.

[0013] According to one embodiment, the control module may be further configured to classify the plurality of detection modules into a plurality of groups.

[0014] According to one embodiment, the control module may be further configured to classify the plurality of detection modules into groups based on the arrangement order.

[0015] According to one embodiment, the control module may be further configured to identically set the detection times of the detection modules belonging to the same group among the plurality of detection modules.

[0016] According to one embodiment, the control module may be further configured to sequentially set the detection time for each group.

[0017] According to one embodiment, the control module may be further configured to classify two detection modules arranged in contact with each other among the plurality of detection modules into different groups.

[0018] According to one embodiment, the control module may be further configured to classify detection modules having an arrangement order that does not affect the response signal among the plurality of detection modules into the same group.

[0019] According to one embodiment, a plurality of detection modules may be arranged at preset intervals.

[0020] According to one embodiment, the input power may be AC ​​power.

[0021] According to another embodiment of the present disclosure, an operating method of an impedance measuring device includes: connecting a plurality of battery cells to a plurality of detection modules; adjusting, by a control module, detection time for the plurality of detection modules; supplying, by a supply unit, input power to the battery cells during the detection time; detecting, by the detection unit, response signals of corresponding battery cells corresponding to the input power during the detection time; and calculating, by the control module, impedances respectively corresponding to the plurality of battery cells based on the response signals.

[0022] According to one embodiment, the operation method may further include classifying, by the control module, the plurality of detection modules into a plurality of groups.

[0023] According to one embodiment, adjusting the detection time may include sequentially setting the detection time for each group by the control module.

[0024] According to one embodiment, classifying the detection modules into a plurality of groups may include classifying, by the control module, the detection modules based on an arrangement order of the detection modules.

[0025] According to one embodiment, the classifying based on the arrangement order may include classifying two detection modules that are arranged in contact with each other among the plurality of detection modules into different groups.

[0026] According to one embodiment, the classifying based on the arrangement order may include classifying detection modules having an arrangement order that does not affect the response signal among the plurality of detection modules into the same group.

[0027] Beneficial Effects

[0028] The impedance measuring device and the operating method thereof according to the embodiments disclosed herein can prevent the response signal from being distorted due to adjacent detection modules.

[0029] The detection modules included in the impedance measurement device according to the embodiments disclosed herein may be divided into a plurality of groups.

[0030] The impedance measuring device according to the embodiments disclosed herein may adjust the impedance detection time for each group and detect a signal with reduced influence of noise from adjacent detection modules.

[0031] Furthermore, various effects directly or indirectly recognized from the present disclosure can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a block diagram of an impedance measurement device according to one embodiment disclosed herein.

[0033] Figure 2 Table showing that detection modules are divided into multiple groups according to one embodiment disclosed herein.

[0034] Figure 3 is a flow chart illustrating a method of operating an impedance measurement device according to one embodiment disclosed herein.

[0035] Figure 4 is a flow chart illustrating an operating method of an impedance measurement device according to another embodiment disclosed herein.

[0036] Figure 5 is a block diagram of a hardware configuration of a computing system for executing an operating method of an impedance measuring device according to one embodiment disclosed herein. DETAILED DESCRIPTION

[0037] Hereinafter, the embodiments disclosed in this document will be described in detail with reference to the exemplary drawings. When adding reference numerals to the components of each drawing, it should be noted that even if the same components are indicated in different drawings, they are given the same reference numerals. In addition, when describing the embodiments disclosed in this document, when it is determined that the detailed description of the related known configuration or function interferes with the understanding of the embodiments disclosed in this document, its detailed description will be omitted.

[0038] To describe the components of the embodiments disclosed herein, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only used to distinguish one component from another component, and do not limit the components to the nature, order, sequence, etc. of the components. The terms used herein, including technical and scientific terms, have the same meanings as those commonly understood by those skilled in the art, as long as these terms are not defined differently. Generally, terms defined in commonly used dictionaries should be interpreted as having the same meanings as the contextual meanings of the relevant technology, and should not be interpreted as having idealized or exaggerated meanings unless they are clearly defined in this application.

[0039] Figure 1 is a block diagram of an impedance measurement device according to one embodiment disclosed herein.

[0040] refer to Figure 1 The impedance measurement device 10 according to one embodiment disclosed herein may be connected to a plurality of battery cells 100a, 100b, 100c to 100n. The impedance measurement device 10 may include a plurality of detection modules 200a, 200b, 200c to 200n respectively connected to the battery cells 100a, 100b, 100c to 100n, 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.

[0041] According to one embodiment, the number of battery cells 100 a to 100 n and the number of detection modules 200 a to 200 n may be arbitrarily set.

[0042] The battery cells 100a to 100n may be basic units of a battery including a positive electrode, a negative electrode, a separator and an electrolyte. The battery cells 100a to 100n may be samples of impedance measurement targets, and the impedance measurement device 10 may include a plurality of detection modules 200a to 200n to measure impedance of the plurality of samples.

[0043] The impedance measuring device 10 may include, for example, an electrochemical impedance spectroscopy device. The electrochemical impedance spectroscopy device may measure the AC impedance spectrum of a battery cell (e.g., 100a) by using a non-destructive testing method. According to one embodiment, by comparing the measured AC impedance spectrum with an equivalent circuit model of the battery cell (e.g., 100a), the degradation state and performance of the battery cell (e.g., 100a) may be estimated.

[0044] The electrochemical impedance spectroscopy apparatus may measure an alternating current (AC) impedance spectrum based on changes in amplitude and phase of response signals detected from the battery cells 100 a to 100 n with respect to changes in the frequency of alternating current (AC) power applied to the battery cells 100 a to 100 n .

[0045] The impedance measurement device 10 may be connected to the battery cells 100a to 100n as impedance measurement targets through the detection modules 200a to 200n. According to one embodiment, one battery cell (eg, 100a) may be connected to one detection module (eg, 200a).

[0046] The detection modules 200 a to 200 n may include a supply unit (eg, 210 a ) for supplying power to the battery cell (eg, 100 a ) and a detection unit (eg, 220 a ) for detecting a response signal of the battery cell (eg, 100 a ).

[0047] According to one embodiment, the detection modules 200 a to 200 n may be arranged at a preset interval, and the preset interval may be reduced due to the demand for miniaturization of the impedance measuring device 10 .

[0048] The supply unit (e.g., 210a) included in each of the detection modules 200a to 200n may supply AC power of a preset frequency to the battery cells 100a to 100n respectively connected to the detection modules 200a to 200n. The frequency of the power supplied by the supply units 210a to 210n may be set by the control module 300. The control module 300 may set the time when the power is supplied by the supply units 210a to 210n and the time when the response signal corresponding to the supplied power for each of the detection modules 200a to 200n is detected.

[0049] According to one embodiment, the supply units 210 a to 210 n may include a power device capable of changing the frequency and amplitude of the AC power.

[0050] The detection units 220a to 220n may detect response signals from the battery cells 100a to 100n respectively connected to the detection modules 200a to 200n and transmit the detected response signals to the control module. According to one embodiment, the control module 300 may control the detection units 220a to 220n to operate during the detection time. The detection units 220a to 220n may map the frequency of the AC power supplied by the supply units 210a to 210n to the response signals output from the battery cells 100a to 100n and transmit them to the control module 300.

[0051] The control module 300 may control the detection modules 200 a to 200 n to adjust the response signal detection time of the battery cells 100 a to 100 n and calculate the impedance corresponding to each of the battery cells 100 a to 100 n based on the received response signal.

[0052] The control module 300 may calculate the impedance based on the frequency of the AC power input to each battery cell (e.g., 100a) and the response signal output from the battery cell 100a. According to one embodiment, the control module 300 may generate an AC impedance spectrum of the battery cell (e.g., 100a) based on the calculated AC impedance spectrum using an equivalent circuit model of each battery cell (e.g., 100a), thereby estimating the degradation state and performance of the battery cell (e.g., 100a).

[0053] When supply units (eg, 210a and 210b) included in adjacent detection modules (eg, 200a and 200b) supply input power during the same detection time, AC power input to the battery cells 100a and 100b may have an influence on response signals of the adjacent battery cells.

[0054] More specifically, the first supply unit 210a can supply AC power of a preset frequency as input power to the first battery cell 100a, and the second supply unit 210b arranged in contact with the first supply unit 210a can supply AC power to the second battery cell 100b when the first detection unit 220a detects a response signal corresponding to the AC power.

[0055] When the second supply unit 210b supplies AC power to the second battery cell 100b, noise may occur in a response signal detected by the first detection unit 220a due to the supplied AC power or a response signal corresponding to the AC power output by the second battery cell 100b.

[0056] When noise occurs in the response signal, the impedance of the battery cells 100a to 100n may not be accurately calculated, and it may be difficult to diagnose the exact states of the battery cells 100a to 100n. In addition, the reliability of the impedance measuring device 10 may not be ensured.

[0057] For example, in order to minimize the influence of noise between adjacent detection modules (e.g., 200a and 200b), the positions of the detection modules 200a to 200n may be adjusted. However, in order to sufficiently ensure the spacing distance between adjacent detection modules (e.g., 200a and 200b), difficulties may arise in miniaturizing the impedance measurement device 10.

[0058] According to one embodiment, the control module 300 may classify the plurality of detection modules 200a to 200n into a preset number of groups. The control module 300 may classify the detection modules 200a to 200n based on the arrangement order of the detection modules 200a to 200n, and identically set the time for supplying input power and the time for detecting a response signal to the detection modules 200a to 200n belonging to the same group. The control module 300 may sequentially set the input power supply time and the response signal detection time for each group.

[0059] The plurality of detection modules 200a to 200n may be arranged at preset intervals. The control module 300 may classify detection modules that do not cause response signal distortion due to noise even when operating simultaneously among the plurality of detection modules 200a to 200n arranged at preset intervals into the same group. Therefore, detection modules (e.g., 200a and 200b) that are in contact with each other may be classified into different groups.

[0060] According to one embodiment, the control module 300 may supply the test power as input power to the battery cells 100a to 100n for group setting. The control module 300 may distinguish the timing of supplying the test power to each of the battery cells 100a to 100n. The control module 300 may receive a response signal corresponding to the test power and calculate a first test impedance corresponding to the battery cells 100a to 100n, respectively.

[0061] The frequency of the test power may be a preset value, and the test power supplied to the battery cells 100 a to 100 n may have the same frequency.

[0062] The first test impedance may be calculated by independent operations of the detection modules 200 a to 200 n , and may be a value excluding noise occurring due to adjacent detection modules (eg, 200 a and 200 b ).

[0063] After calculating the first test impedance, the control module 300 may arbitrarily determine two detection modules for supplying the test power to the corresponding battery cells from among the detection modules 200 a to 200 n based on the arrangement order.

[0064] For example, the control module 300 may select the first detection module 200a and the second detection module 200b as detection modules for supplying test power, or select the first detection module 200a and the third detection module 200c as detection modules for supplying test power.

[0065] The control module 300 may supply test power to battery cells (eg, 100a and 100b) connected to the detection modules (eg, 200a and 200b) through two selected detection modules (eg, 200a and 200b) and detect two response signals corresponding to the test power.

[0066] The control module 300 may calculate a second test impedance based on the response signals received from the two selected detection modules (eg, 200 a and 200 b ).

[0067] The control module 300 may compare the first test impedance with the second test impedance and determine whether noise occurs. When the first test impedance and the second test impedance are different from each other, the control module 300 may classify the two selected detection modules into different groups. When the first test impedance and the second test impedance are the same as each other or fall within a preset error range, the control module 300 may classify the two selected detection modules into the same group.

[0068] The control module 300 may find a detection module that minimizes the influence of noise even when input power of the same frequency is supplied to the battery cells at the same timing, by calculating the first test impedance and the second test impedance.

[0069] The control module 300 may classify detection modules that minimize the influence of noise into the same group and identically set detection times, thereby minimizing noise occurring in detection of impedances of the plurality of battery cells 100 a to 100 n and reducing time required for impedance detection.

[0070] Since the detection modules 200a to 200n are arranged at preset intervals, the control module 300 may classify the detection modules having an arrangement order that minimizes noise influence on each other or does not influence a response signal into the same group.

[0071] The control module 300 can supply test power as input power to the battery cells 100a to 100n to classify the multiple detection modules 200a and 200b into multiple groups, and the number of groups and the number of detection modules belonging to the same group can vary with the interval at which the detection modules 200a to 200n are arranged and the distance between the detection modules 200a and 200b, which minimizes the noise occurring in the impedance detection.

[0072] Figure 2 Table showing that detection modules are divided into multiple groups according to one embodiment disclosed herein.

[0073] refer to Figure 2 , when the total number of detection modules is 20, the first to twentieth detection modules may be classified into five groups, each of which includes four detection modules.

[0074] For the convenience of description, it is assumed that the first to twentieth detection modules may be arranged in a row, and the arrangement intervals between adjacent detection modules are regular.

[0075] Figure 2 The table shown in may illustrate an embodiment in which at least four detection modules need to be arranged between two detection modules in order to minimize the influence of noise or avoid affecting the response signal.

[0076] As reference Figure 1 As described, Figure 1 The control module 300 supplies test power as input power to the battery cells connected to the corresponding detection modules to calculate the first test impedance and supplies the test power to two arbitrary detection modules among all the detection modules to calculate the second test impedance to obtain a distance that minimizes the influence of noise from adjacent detection modules.

[0077] Figure 2 A table showing that detection modules are spaced apart from each other by 5 or more in arrangement order so as to belong to the same group.

[0078] Figure 1 The control module 300 can identically set the input power supply time and the response signal detection time of the detection modules belonging to the same group. Figure 1 The control module 300 may be configured to sequentially perform input power supply and response signal detection for each group.

[0079] According to one embodiment, the detection modules belonging to the first group (the first detection module, the sixth detection module, the eleventh detection module and the sixteenth detection module) can supply input power to the corresponding battery cells, and when the response signals of the battery cells are detected, the detection modules classified into the second to fifth groups may not perform input power supply and response signal detection.

[0080] For example, when the first set of input power supply and response signal detection is terminated, the second set of input power supply and response signal detection may be performed. Figure 1 The control module 300 may control the detection module to perform input power supply and response signal detection on all groups (first to fifth groups), and calculate impedances of all battery cells based on the detected response signals.

[0081] Figure 3 is a flow chart illustrating a method of operating an impedance measurement device according to one embodiment disclosed herein.

[0082] In operation S100 , a plurality of battery cells 100 a to 100 n may be connected to the impedance measuring device 10 .

[0083] The battery cells 100 a to 100 n may be samples as impedance measurement targets, and the impedance measurement device 10 may include a plurality of detection modules 200 a to 200 n respectively connected to the plurality of battery cells 100 a to 100 n .

[0084] In operation S200 , the control module 300 may classify the plurality of detection modules 200 a to 200 n into a preset number of groups.

[0085] The control module 300 may classify the detection modules 200a to 200n into a plurality of groups based on the arrangement order of the detection modules 200a to 200n. For example, two detection modules (eg, 200a and 200b) in contact with each other may be classified into different groups.

[0086] Reference Figure 4 A method for the control module 300 to classify the detection modules 200a to 200n is described.

[0087] In operation S300, the control module 300 may control a detection time for the plurality of detection modules 200a to 200n. The detection time may refer to a time for detecting a response signal to input power from the battery cells 100a and 100b connected to the detection modules 200a to 200n.

[0088] According to one embodiment, the control module 300 may identically set the detection times for the detection modules belonging to the same group.

[0089] When adjusting the detection times for a plurality of detection modules, the control module 300 may sequentially set the detection times for the corresponding groups.

[0090] Since the detection time for each group is sequentially set, detection modules belonging to different groups may not operate at the same timing.

[0091] In operation S400 , the control module 300 may control a supply unit (eg, 210 a ) included in a detection module (eg, 200 a ) to supply input power to a battery cell (eg, 100 a ) connected to the detection module (eg, 200 a ).

[0092] The input power may be alternating current power having a preset frequency and amplitude.

[0093] In operation S500 , the detection unit (eg, 220 a ) may detect a response signal of the battery cell (eg, 100 a ) corresponding to the input power within the detection time and map the frequency of the input power to the response signal to transmit it to the control module 300 .

[0094] In operation S600 , the control module 300 may calculate impedances respectively corresponding to the plurality of battery cells 100 a to 100 n based on the response signal.

[0095] According to one embodiment, the control module 300 may calculate the impedance for the input frequency for each of the battery cells 100a to 100n and generate an AC impedance spectrum based on the calculated impedance. By comparing the generated AC impedance spectrum with the equivalent circuit model of the battery cells 100a to 100n, the control module 300 may diagnose the degradation state and performance of the battery cells 100a to 100n.

[0096] Figure 4 is a flow chart illustrating an operating method of an impedance measuring device according to another embodiment disclosed herein.

[0097] refer to Figure 4 , a method for the control module 300 to classify the detection modules 200a to 200n into a plurality of groups to prevent noise that may occur between adjacent detection modules 200a to 200n will be described in detail.

[0098] After the plurality of battery cells 100 a to 100 n are connected to the impedance measuring device 10 in S100 , the control module 300 may control the supply units 210 a to 210 n to supply test power to each of the battery cells 100 a to 100 n in operation S210 .

[0099] The test power may be power having a preset frequency.

[0100] The test power may be supplied to the battery cells 100 a to 100 n at different timings.

[0101] The control module 300 may receive response signals of the battery cells 100 a to 100 n corresponding to the test power from the corresponding detection modules 200 a to 200 n.

[0102] In operation S220 , the control module 300 may calculate a first test impedance of the plurality of battery cells 100 a to 100 n based on the received response signal.

[0103] The first test impedance may be calculated based on response signals detected by operations of the respective detection modules 200 a to 200 n at different timings, and thus may be a value excluding the influence of noise between adjacent detection modules (eg, 200 a and 200 b ).

[0104] After calculating the first test impedance, in operation S230, the control module 300 may arbitrarily determine two detection modules for supplying test power to the corresponding battery cell from among the detection modules 200a to 200n. According to one embodiment, the control module 300 may initially select detection modules that are close to each other, and may select detection modules that are increasingly far from each other when repeating the detection module determination.

[0105] The control module 300 may control the two selected detection modules to supply the test power to the corresponding battery cells through the supply unit. The test power may be supplied to the two corresponding battery cells at the same time.

[0106] In operation S240 , the control module 300 may calculate second test impedances of the two battery cells based on the response signals detected by the two detection modules.

[0107] The second test impedance may be calculated when the two detection modules are operated simultaneously, and may be a value reflecting the effect of noise on the two selected detection modules.

[0108] In operation S250, the control module 300 may compare the first test impedance and the second test impedance of each battery cell to determine whether they fall within a preset error range. When the first test impedance and the second test impedance fall within the preset error range (yes in operation S250), the control module 300 may classify the two selected detection modules into the same group in operation S260.

[0109] According to one embodiment, when the first test impedance and the second test impedance fall within a preset error range, the control module 300 may select other detection modules for calculating the second test impedance using the distance between the two selected detection modules and the arrangement order of the two selected detection modules.

[0110] The control module 300 may classify the detection modules 200 a to 200 n whose first test impedance and second test impedance fall within a preset error range and whose arrangement order differences among the detection modules are the smallest, into the same group.

[0111] After finding the detection module whose first test impedance and second test impedance fall within the preset error range and whose arrangement order difference between the detection modules is the smallest, the control module 300 can apply the group classification based on the arrangement order between the two detection modules to all detection modules 200a to 200n to classify the detection modules 200a to 200n.

[0112] When the first test impedance and the second test impedance fall outside the preset error range (No in operation S250 ), the control module 300 may again determine two detection modules for calculating the second test impedance in operation S230 .

[0113] Figure 5 is a block diagram of a hardware configuration of a computing system for executing an operating method of an impedance measuring device according to one embodiment disclosed herein.

[0114] refer to Figure 5 , a computing system 1000 according to one embodiment disclosed herein may include a microcontroller unit (MCU) 1010 , a memory 1020 , an input / output interface (I / F) 1030 , and a communication I / F 1040 .

[0115] According to one embodiment, the computing system 1000 may be a system for executing the above-described operations of the control module 300 or the detection module (eg, 200 a ).

[0116] The MCU 1010 may be a processor that executes various programs stored in the memory 1020 .

[0117] For example, the MCU 1010 may process voltage, current data, control signals, etc. required for the control module 300 to manage and control the detection module (eg, 200 a ).

[0118] The MCU 1010 may be a processor for processing data and / or signals. For example, the MCU 1010 may adjust the current supplied to the battery cell (e.g., 100a) to control the detection module (e.g., 200a) to detect the response signal of the battery cell (e.g., 100a). The MCU 1010 may be a processor for performing impedance calculation based on information output from the battery pack 100.

[0119] The memory 1020 may store various programs required for the control module 300 to manage and control the battery cell (eg, 100a) and the detection module (eg, 200a). The memory 1020 may also store various programs required for the control module 300 to calculate impedance.

[0120] For example, the memory 1020 may store a response signal of each battery cell (eg, 100a), such as voltage, current, characteristic data, etc. In addition, the memory 1020 may store a program for calculating impedance based on voltage, current, characteristic data, etc. The memory 1020 may be provided in plural as needed.

[0121] The memory 1020 may be a volatile memory or a nonvolatile memory. For the memory 1020 as a volatile memory, a random access memory (RAM), a dynamic RAM (DRAM), a static RAM (SRAM), etc. may be used. For the memory 1020 as a nonvolatile memory, a read-only memory (ROM), a programmable ROM (PROM), an electrically rewritable ROM (EAROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), a flash memory, etc. may be used. The above-listed examples of the memory 1020 are merely examples and are not limited thereto.

[0122] The input / output I / F 1030 may provide an interface for transmitting and receiving data by connecting an input device (not shown) such as a keyboard, a mouse, a touch panel, etc. and an output device such as a display (not shown) to the MCU 1010 .

[0123] The communication I / F 1040, which is a component capable of transmitting and receiving various data to and from a server, may be various devices capable of supporting wired or wireless communication. For example, a program or various data for impedance detection of the battery cell 110, etc. may be transmitted to and received from a separately provided external server through the communication I / F 1040.

[0124] Therefore, the computer program according to one embodiment disclosed herein may be recorded in the memory 1020 and processed by the MCU 1010, thereby being implemented as an execution Figures 1 to 4 The functions of the modules are shown in Figure 2.

[0125] The above description merely illustrates the technical concept of the present disclosure, and various modifications and variations may be made by a person skilled in the art to which the embodiments disclosed herein belong without departing from the basic characteristics of the embodiments of the present disclosure.

[0126] Therefore, the embodiments disclosed herein are intended to describe rather than limit the technical spirit of the embodiments disclosed herein, and the scope of the technical spirit of the present disclosure is not limited by these embodiments disclosed herein. The protection scope of the technical spirit disclosed herein should be interpreted by the attached claims, and all technical spirits within the same scope should be understood to be included in the scope of the present disclosure.

Claims

1. An impedance measuring device, comprising: A plurality of detection modules, wherein the plurality of detection modules are configured to detect response signals respectively corresponding to a plurality of battery cells; as well as a control module configured to calculate impedances respectively corresponding to the plurality of battery cells based on the response signal, Each of the plurality of detection modules comprises: a supply unit configured to supply input power to corresponding battery cells; as well as a detection unit configured to detect the response signal of the corresponding battery cell to the input power during a detection time, and The control module is further configured to adjust the detection time for the plurality of detection modules. 2 . The impedance measurement device according to claim 1 , wherein the control module is further configured to classify the plurality of detection modules into a plurality of groups. 3 . The impedance measurement device according to claim 2 , wherein the control module is further configured to classify the plurality of detection modules into the groups based on an arrangement order. 4 . The impedance measuring device according to claim 2 , wherein the control module is further configured to identically set detection times of detection modules belonging to the same group among the plurality of detection modules. 5 . The impedance measuring device according to claim 2 , wherein the control module is further configured to sequentially set the detection time for each group. 6 . The impedance measuring device according to claim 3 , wherein the control module is further configured to classify two detection modules arranged in contact with each other among the plurality of detection modules into different groups. 7 . The impedance measuring device according to claim 3 , wherein the control module is further configured to classify detection modules having the arrangement order that does not affect the response signal among the plurality of detection modules into the same group. 8 . The impedance measuring device according to claim 1 , wherein the plurality of detection modules are arranged at preset intervals.

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

10. An operating method of an impedance measuring device, the operating method comprising: Connecting a plurality of battery cells to a plurality of detection modules; The control module adjusts the detection time for the multiple detection modules; supplying input power to the battery cell by a supply unit during the detection time; detecting, by a detection unit, a response signal of a corresponding battery cell corresponding to the input power during the detection time; as well as The control module calculates impedances respectively corresponding to the plurality of battery cells based on the response signals. The operating method according to claim 10 , further comprising classifying, by the control module, the plurality of detection modules into a plurality of groups. 12 . The operating method according to claim 11 , wherein adjusting the detection time comprises sequentially setting the detection time for each group by the control module. 13 . The operating method according to claim 11 , wherein classifying the detection modules into the plurality of groups comprises classifying, by the control module, the detection modules based on an arrangement order of the detection modules. 14 . The operating method according to claim 13 , wherein the classifying based on the arrangement order comprises classifying two detection modules that are arranged in contact with each other among the plurality of detection modules into different groups. 15 . The operating method according to claim 13 , wherein the classifying based on the arrangement order comprises classifying detection modules having the arrangement order that does not affect the response signal among the plurality of detection modules into the same group.

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