Correction device and correction method for correcting initial values ​​of impedance spectrum measuring device

Abstract

The present invention relates to a correction device for correcting an impedance spectrum measuring device, the correction device comprising: a first plate including a first connecting portion electrically connected to a first electrode of the impedance spectrum measuring device; a second plate including a second connecting portion electrically connected to a second electrode of the measuring device; and a reference unit attached to the first plate and having a predetermined unique value, wherein the first connecting portion and the second connecting portion are electrically connected to each other via the reference unit.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0132747, filed October 14, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a correction device and a correction method for correcting the initial value of an electrochemical impedance spectrum measuring device for diagnosing the state of a battery cell. [Background technology]

[0003] Electrochemical Impedance Spectroscopy (EIS) is a non-destructive method for diagnosing battery conditions. EIS applies minute sinusoidal current and voltage signals ranging from high to low frequencies and measures changes in amplitude and phase through the voltage and current signals that respond within the battery's electrical and thermal equilibrium states to analyze impedance. Sinusoidal signals are applied ranging from high to low frequencies, and impedance for each frequency can be derived through the response signals generated in response to the applied signals. Because EIS is a method for analyzing internal mechanisms using the frequency domain, it has the advantage of being able to analyze the status of the components that make up the battery system, such as the positive electrode, negative electrode, separator, and electrolyte, separately by frequency domain.

[0004] Because an electrochemical impedance measuring device is sensitive to minute changes in current and voltage signals, it is important to accurately set an initial value of the measuring device before measuring the impedance spectrum of a battery cell to minimize possible errors. Therefore, it is necessary to check whether the initial value set in the measuring device is accurate, and if the check reveals that the initial value is inaccurate, the previously set initial value must be corrected. However, if an impedance spectrum is measured using a battery cell to check whether the set initial value is accurate, changes in the components inside the battery cell occur over time in the measuring device, which is sensitive to even minute changes in current and voltage, causing errors in the output signal. Since these errors accumulate, it is difficult to check whether the set initial value is accurate. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention aims to solve the above problems and provides a correction device and a correction method for correcting the initial values ​​of an impedance spectrum measuring device, which can check whether the initial values ​​of the impedance spectrum measuring device are set correctly and, if the initial values ​​are set incorrectly, can calculate correction values ​​to correct the initial values. [Means for solving the problem]

[0006] According to one embodiment of the present invention, there is provided a correction device for correcting an impedance spectrum measuring device, the correction device comprising: a first plate including a first connecting portion electrically connected to a first electrode of the impedance spectrum measuring device; a second plate including a second connecting portion electrically connected to a second electrode of the measuring device (the impedance spectrum measuring device); and a reference unit attached to the first plate and having a predetermined electrical value, wherein the first connecting portion and the second connecting portion are electrically connected to each other via the reference unit.

[0007] The reference unit may also be configured so that an impedance spectrum is measured by the measurement device (the impedance spectrum measurement device).

[0008] In addition, the first plate may further include a fixing unit electrically connected to the first connection portion via the reference unit, and the second plate may further include a connection unit contacting the fixing unit and electrically connecting to the second connection portion.

[0009] The connection unit can also be in contact with the fixed unit.

[0010] The connection unit may have a slide hole formed along its length, a coupling unit may be inserted into the slide hole, and the inserted coupling unit may be coupled to the fixing unit.

[0011] The reference unit may also be a capacitor.

[0012] The first plate may further include a mounting portion having a receiving space in which the reference unit is mounted.

[0013] The first plate may further include a guide unit disposed along a length direction of the first plate and below the connection unit.

[0014] Also, the height of the guide unit may be the same as the height of the fixing unit.

[0015] The fixing unit and the connecting unit may include a metal member.

[0016] Meanwhile, as another embodiment of the present invention, the present invention can provide a correction method for correcting an impedance spectrum measuring device, the correction method including the steps of: connecting a first pole and a second pole of the impedance spectrum measuring device to a first connecting portion and a second connecting portion of a correction device; applying a sinusoidal input signal to a reference unit that electrically connects the first connecting portion and the second connecting portion via the measuring device (the impedance spectrum measuring device); and outputting an output signal including an impedance spectrum according to the applied input signal.

[0017] The method may further include a step of calculating a correction value by comparing the output signal with a predetermined electrical value of a reference unit, and correcting the measurement device (the impedance spectrum measurement device) to the correction value.

[0018] The output signal may include at least one of a Bode plot and a Nyquist plot.

[0019] Meanwhile, as yet another embodiment of the present invention, there is provided a measuring device assembly including an impedance spectrum measuring device, a fixture structure electrically connected to a first pole and a second pole of the measuring device (the impedance spectrum measuring device), and a compensation device coupled to the fixture structure, wherein the compensation device includes a first plate including a first connecting portion electrically connected to the first pole of the impedance spectrum measuring device, a second plate including a second connecting portion electrically connected to the second pole of the measuring device (the impedance spectrum measuring device), and a reference unit attached to the first plate and having a predetermined electrical value, wherein the first connecting portion and the second connecting portion are electrically connected to each other via the reference unit. [Effects of the Invention]

[0020] The initial value correction device and correction method for correcting an impedance spectrum measuring device according to the present invention can provide a more accurate correction value by using a capacitor that is stable against changes in internal components, and can minimize noise included in an output signal by electrically connecting via a metal member rather than a conductor. [Brief explanation of the drawings]

[0021] [Figure 1] 1 shows a battery cell coupled to an impedance spectrum measuring device. [Figure 2] 1 is a perspective view showing a state in which a correction device, an impedance spectrum measuring device, and a jig structure according to an embodiment of the present invention are coupled together. [Figure 3] 1 is a plan view showing the structure of a correction device according to an embodiment of the present invention. [Figure 4] FIG. 10 is a plan view showing a method for connecting a negative pin and a positive pin formed on the reference unit to a connection unit and a coupling unit via conductors when there is one reference unit in a correction device according to an embodiment of the present invention, and a method for adjusting the separation distance between the first plate and the second plate. [Figure 5] FIG. 10 is a plan view showing a method for connecting a negative pin and a positive pin formed on the reference unit to a connecting unit and a coupling unit via conductors when there are two reference units in a correction device according to another embodiment of the present invention, and a method for adjusting the separation distance between the first plate and the second plate. [Figure 6] FIG. 5 is a side view of part "A" in FIG. 4, showing how the fixing unit, the connection unit, and the first plate are coupled together by the coupling unit. [Figure 7] 5 is an enlarged view of the "B" and "C" portions of FIG. 4 according to the present invention, showing the pattern grooves of the connecting unit and the pattern grooves of the second connecting portion. [Figure 8]10 is a perspective view illustrating a state in which a negative electrode pin and a positive electrode pin formed on a base unit are connected to a connecting unit and a fixing unit via conductors, according to an embodiment of the present invention; FIG. [Figure 9] 10 is a plan view showing another embodiment of the present invention, in which a base unit is connected to a coupling unit and a fixing unit via a connecting unit. FIG. [Figure 10] FIG. 10 is a front view showing another embodiment of the present invention, in which a base unit is connected to a coupling unit and a fixing unit via a connecting unit. DETAILED DESCRIPTION OF THE INVENTION

[0022] The present invention will be described in more detail below with reference to the drawings. However, the following drawings are provided to facilitate understanding of the present invention, and are merely one embodiment of the present invention, and the scope of the present invention is not limited to the scope described in the drawings. In the following drawings, the same reference numerals refer to the same components, and some components may be exaggerated, reduced, or omitted to facilitate understanding of the present invention.

[0023] 1 and 2, the present invention relates to a correction device 10 for correcting an initial value of an impedance spectrum measuring device 1, and a battery cell C or the correction device 10 can be coupled to a fixture structure 2 electrically connected to a first pole and a second pole of the measuring device 1. The measuring device 1 can apply minute sinusoidal current and voltage signals from a high frequency region to a low frequency region to the fixture structure 2, and can visually display the output signals.

[0024] Referring to FIG. 3, the correction device 10 may include a first plate 100 , a second plate 200 , and a reference unit 300 .

[0025] The first plate 100 has a predetermined thickness and can be formed in a flat plate shape so that other structures can be disposed thereon.

[0026] The first plate 100 may include a first connecting portion 110, a fixing unit 120, a coupling unit 130, a guide unit 140, and a mounting portion 150. The first connecting portion 110, the fixing unit 120, the coupling unit 130, and the guide unit 140 may be disposed on one surface of the first plate 100. The mounting portion 150 may also be formed on one surface of the first plate 100. The first plate 100 may include an electrically insulating material to prevent the flow of electricity.

[0027] The first connecting portion 110 is disposed on one side of one surface of the first plate 100 and may be electrically connected to a first pole of the measuring device 1. In addition, the first connecting portion 110 may function to electrically connect the reference unit 300 to the first pole of the measuring device 1.

[0028] The first connecting part 110 may include a supporting unit 111 , a connecting unit 112 and a fastening unit 113 .

[0029] The support unit 111 separates the upper surface of the first plate 100 and the connecting unit 112 through which electricity can flow by a distance equal to the thickness thereof, thereby preventing electricity from flowing directly to the first plate 100 .

[0030] The support unit 111 is arranged so that its end does not deviate from the area of ​​the upper surface of the first plate 100, and the connection unit 112 coupled to the support unit 111 can protrude outward from the first plate 100. This allows the connection unit 112 to be coupled to the first pole coupling portion of the jig structure 2 of the measuring device 1.

[0031] The connecting unit 112 can be arranged on the upper surface of the support unit 111, and at least a portion of it can protrude outward from the area of ​​the upper surface of the first plate 100, and the protruding portion can be coupled to the jig structure 2 of the measuring device 1.

[0032] The connection unit 112 may include an electrically conductive metal material so that electricity flows toward or from the first pole, and may include, but is not limited to, any one or more of silver, copper, gold, aluminum, and tungsten.

[0033] The connection unit 112 may include a metal member such as a metal piece, a metal bar, a metal rod, or a metal plate formed with a predetermined thickness and width. In this case, the cross-sectional area is larger than that of a typical electric wire, thereby reducing electrical resistance, and the flow is small, thereby minimizing noise input to the impedance spectrum measurement device 1, which outputs a signal sensitively even with a minute current flow.

[0034] A plurality of connection units 112 may be provided and disposed at predetermined distances on a plurality of support units 111 spaced apart from each other. By providing a plurality of connection units 112, the electrical connection with the reference unit 300 can be performed using a 4-wire resistance connection method, thereby minimizing values ​​such as resistance generated by conductors electrically connecting the measuring device 1 to the reference unit 300, and enabling accurate measurement of minute impedance values ​​of the reference unit 300.

[0035] The cross-sectional shape of the connection unit 112 is not limited thereto, but may be formed into a polygon such as a square, rectangle, pentagon, or hexagon, or a closed curve shape such as a circle or ellipse.

[0036] A pattern groove 112a having a predetermined pattern may be formed on an edge of one or both surfaces of the connecting unit 112. When the connecting unit 112 and the first pole connecting portion of the measuring device 1 are connected, the pattern groove 112a generates friction to improve the physical bonding force between the connecting unit 112 and the first pole connecting portion of the measuring device 1. In addition, the pattern groove 112a increases the contact area with the first pole connecting portion of the fixture structure 2 of the measuring device 1, thereby enabling a good current flow.

[0037] The fastening unit 113 can fasten the connecting unit 112 to the support unit 111 to fix the connecting unit 112 to the support unit 111. The fastening unit 113 forms a continuous spiral screw protrusion around the body 113b, so that the strength of the fastening force can be adjusted by tightening or loosening the fastening force depending on the rotation direction of the fastening unit 113. In some cases, the fastening unit 113 can be separated from the connecting unit 112 and the support unit 111.

[0038] The fastening unit 113 may include a head 113a and a body 113b. The head 113a is coupled to an upper portion of the body 113b. When the head 113a is gripped with fingers and rotated clockwise or counterclockwise, the body 113b also rotates in the same direction as the head 113a. The head 113a may include an electrically insulating material such as plastic. The body 113b may be made of a metal material with high electrical conductivity, and the body 113b and the connecting unit 112 may come into contact with each other and be electrically connected.

[0039] The body 113b and the reference unit 300 may be electrically connected via a conductor, and thus the connection unit 112 and the reference unit 300 may also be electrically connected.

[0040] The fixing unit 120 may be coupled to one surface of the first plate 100 and may be in contact with and electrically connected to the connecting unit 220 fastened to the second plate 200 .

[0041] The fixing unit 120 may electrically connect between the reference unit 300 and the connection unit 220, which will be described later, and may include an electrically conductive metal material to allow electricity to flow, such as, but not limited to, any one or more of silver, copper, gold, aluminum, and tungsten.

[0042] The fixing unit 120 is formed with a predetermined thickness and width and may take the form of a metal member such as a metal piece, a metal bar, a metal rod, a metal plate, etc. In this case, the cross-sectional area is larger than that of a general electric wire, which reduces the electrical resistance, and the flow is small, which minimizes noise input to the impedance spectrum measuring device 1, which sensitively outputs a signal even with a minute current flow.

[0043] The cross-sectional shape of the fixing unit 120 may be, but is not limited to, a polygon such as a square, rectangle, pentagon, or hexagon, or a closed curve shape such as a circle or ellipse.

[0044] The fixing unit 120 may be disposed on one surface of the first plate 100 on the other side opposite to the side where the first connecting portion 110 is located.

[0045] A plurality of fixing units 120 may be provided and arranged at a predetermined distance apart on one surface of the first plate 100. By providing a plurality of fixing units 120, an electrical connection with the reference unit 300 can be made using a 4-wire resistance connection method, thereby minimizing values ​​such as resistance generated by the conductors electrically connecting the measuring device 1 to the reference unit 300, and enabling accurate measurement of minute impedance values ​​of the reference unit 300.

[0046] 6, a plurality of coupling units 130 may be provided and coupled to the fixing unit 120. The coupling units 130 may couple the fixing unit 120 to the first plate 100, or may be inserted into the slide holes 221 to couple the fixing unit 120 to the first plate 100 such that the fixing unit 120 and the connection unit 220 are in contact with each other.

[0047] The coupling unit 130 may be formed in the same structure and shape as the fastening unit 113 and may include a head portion 130a and a body portion 130b. The head portion 130a and the body portion 130b of the coupling unit 130 may correspond to the head portion 113a and the body portion 113b of the fastening unit 113, respectively.

[0048] The body portion 130b has a continuous spiral screw protrusion formed along the circumference thereof, so that the strength of the fastening force can be adjusted by tightening or loosening the fastening force depending on the direction of rotation of the coupling unit 130. In some cases, the coupling unit 130 can be separated from the fixing unit 120 and the first plate 100.

[0049] The coupling unit 130 may include a head portion 130a and a body portion 130b. The head portion 130a is coupled to the upper portion of the body portion 130b. When the angular head portion 130a is gripped with fingers and rotated clockwise or counterclockwise, the body portion 130b also rotates in the same direction as the head portion 130a. The head portion 130a may include an insulating material such as plastic. The body portion 130b may be formed of a metal material with high electrical conductivity and may be in contact with and electrically connected to the fixing unit 120 and the connection unit 220.

[0050] The body 130b and the reference unit 300 may be electrically connected via a conductive wire, and thus the fixing unit 120 and the reference unit 300 may also be electrically connected.

[0051] At least one guide unit 140 may be provided, and may be arranged along the length direction of one or both corners on the upper surface of the first plate 100 and adjacent to one end of the fixing unit 120.

[0052] The guide unit 140 may be located between the first plate 100 and the connection unit 220. The guide unit 140 may extend alongside the connection unit 220.

[0053] When the connection unit 220 contacts the fixing unit 120 and slides, the guide unit 140 contacts the lower surface of the connection unit 220 and can guide the connection unit 220 so that it can slide while maintaining the height at which it is positioned.

[0054] The height of the guide unit 140 can be the same as the height of the fixed unit 120 .

[0055] The guide unit 140 may include an insulating material that does not conduct electricity so that the current flowing through the connection unit 220 does not flow to the first plate 100 .

[0056] The fixing unit 120 may be disposed at one end in the length direction of the guide unit 140. The arrangement of the guide unit 140 and the fixing unit 120 is not limited thereto, but may be arranged in a bent shape.

[0057] The mounting portion 150 may be formed on one surface of the first plate 100 and may be a location for mounting the reference unit 300 .

[0058] The mounting part 150 may have an accommodating space formed therein in which the reference unit 300 can be accommodated.

[0059] The mounting portion 150 can be disposed between the first connecting portion 110 and the fixed unit 120 so that the reference unit 300 can electrically connect between the first pole and the second pole of the measuring device 1.

[0060] 4 and 5, the distance between the second plate 200 and the first plate 100 can be adjusted. Thus, the size of the correction device 10 can be adjusted so that the correction device 10 can be coupled to the size of the coupling space of the correction device formed in the jig structure 2 of the measuring device 1. The second plate 200 may be provided with a second coupling part 210 coupled to the second pole of the measuring device 1. A coupling unit 220 may be fastened to the second plate 200. The second plate 200 may move together with the coupling unit 220. The distance between the second plate 200 and the first plate 100 is adjustable, and the coupling distance may be set to 0, in which case the second plate 200 may come into contact with the first plate 100.

[0061] The second plate 200 has a predetermined thickness and may be formed in a flat plate shape so that other components can be disposed on one side.

[0062] The second plate 200 may include an insulating material to prevent current from passing through it.

[0063] One or more second connecting portions 210 may be provided and may be coupled to one or both sides on one surface of the second plate 200. The second connecting portion 210 may be a location for being coupled to a second pole connecting portion of the jig structure 2 of the measuring device 1 to be electrically coupled to the second pole.

[0064] The second connection part 210 may include an electrically conductive metal material to allow electricity to flow, such as, but not limited to, one or more of silver, copper, gold, aluminum, and tungsten.

[0065] The second connecting part 210 may be in the form of a metal member such as a metal piece, a metal bar, a metal rod, or a metal plate formed with a predetermined thickness and width. In this case, the cross-sectional area is larger than that of a typical electric wire, which reduces electrical resistance, and the flow is small, which minimizes noise input to the impedance spectrum measuring device 1, which sensitively outputs signals even with a minute current flow.

[0066] The cross-sectional shape of the second connection part 210 is not limited thereto, but may be formed in a polygonal shape such as a square, rectangle, pentagon, or hexagon, or a closed curve shape such as a circle or ellipse.

[0067] At least a portion of the second connecting portion 210 is disposed on the second plate 200, and the remainder is disposed on the opposite side of the first plate 100, and can protrude from an end portion of the second plate 200. The second connecting portion 210 protruding from the end portion of the second plate 200 can be coupled to a second pole connecting portion of the fixture structure 2.

[0068] The second connecting part 210 may have a bent shape. An end of the second connecting part 210 may be bent and extended perpendicular to the length direction of the connection unit 220. This increases the coupling area with the second electrode connecting part of the fixture structure 2 of the measuring device 1, thereby improving ease of coupling.

[0069] 7, a pattern groove 210a having a predetermined pattern may be formed on an edge of one or both surfaces of the second connecting part 210. The pattern groove 210a generates friction when the second connecting part 210 and the second pole connecting part of the measuring device 1 are connected, thereby improving the physical bonding strength between the second connecting part 210 and the second pole connecting part of the measuring device 1. In addition, the pattern groove 210a increases the contact area with the first pole connecting part of the fixture structure 2, thereby allowing for better current flow.

[0070] The second connection part 210 may be electrically connected to the connection unit 220 directly or via an intermediary.

[0071] The connection unit 220 is a configuration for connecting the first plate 100 and the second plate 200, and may be a configuration for moving the second plate 200 to adjust the distance between it and the first plate 100.

[0072] The connection unit 220 may include an electrically conductive metal material to allow electricity to flow, such as, but not limited to, one or more of silver, copper, gold, aluminum, and tungsten.

[0073] The connection unit 220 may be in the form of a metal member such as a metal piece, a metal bar, a metal rod, or a metal plate formed with a predetermined thickness and width. In this case, the cross-sectional area is larger than that of a general electric wire, which reduces the electrical resistance, and the flow is small, which minimizes noise input to the impedance spectrum measurement device 1, which sensitively outputs a signal even with a minute current flow.

[0074] The cross-sectional shape of the connection unit 220 may be, but is not limited to, a polygon such as a square, rectangle, pentagon, or hexagon, or a closed curve shape such as a circle or ellipse.

[0075] One end of the connection unit 220 may be coupled to the second plate 200 , and the other end may be disposed on the guide unit 140 disposed on the first plate 100 .

[0076] The connection unit 220 may have a slide hole 221 formed along its length so that the connection unit 220 can slide on the guide unit 140 .

[0077] The body 130b of the coupling unit 130 is inserted into the slide hole 221, so that the inner surface of the slide hole 221 and the body 130b of the coupling unit 130 can maintain contact, and the inserted body 130b can couple the fixing unit 120 arranged at the bottom of the connection unit 220 to the first plate 100.

[0078] The connection unit 220 can slide on the guide unit 140 and the fixed unit 120 by adjusting the position of the body 130b of the coupling unit 130 inserted into the slide hole 221. This allows the separation distance between the second plate 200 and the first plate 100 to be adjusted.

[0079] The reference unit 300 may include a predetermined unique value, which may be an electrical or electronic value.

[0080] The reference unit 300 may be a capacitor or a supercapacitor. The reference unit 300 can obstruct the flow of an input signal through impedance, which is a predetermined electrical or electronic value, depending on the frequency of the input current and voltage signal, and generate an output signal by changing the phase and amplitude.

[0081] The impedance of the reference unit 300 may be a resistance value that varies depending on the frequency of the sinusoidal voltage and current input to the reference unit 300 .

[0082] One or more reference units 300 may be provided and may be attached to the attachment portion 150 of the first plate 100. When a plurality of reference units 300 are provided, the reference units 300 may be electrically connected in parallel. When a plurality of reference units 300 are provided and connected in parallel, the number of times the impedance of the reference unit 300 is measured per one charge of the reference unit 300 can be increased, thereby improving convenience in use.

[0083] The reference unit 300 may be connected to the fastening unit 113 and the coupling unit 130 via wires, etc., using a four-wire resistance connection method. By connecting the reference unit 300 using the four-wire resistance connection method, resistance, contact resistance, etc., generated by the wires connected to the reference unit 300 can be reduced, thereby minimizing the occurrence of errors.

[0084] 4, in one embodiment of a connection method for connecting the base unit 300 to the fastening units 113 and the coupling units 130 via conductors, when one base unit 300 is provided, a first electrode pin formed on the base unit may be redundantly connected to the body parts 113b of the plurality of fastening units 113 via a plurality of conductors. A second electrode pin formed on the base unit 300 may be redundantly connected to the body parts 130b of the plurality of coupling units 130 via a plurality of conductors.

[0085] 5, in another embodiment of the connection method of connecting the reference unit 300 to the fastening unit 113 and the coupling unit 130 with conductors according to the present invention, when a plurality of reference units 300 are provided, the plurality of fastening units 113 may be overlappingly connected to first pole pins of the reference units 300 disposed closest to the fastening units 113 via a plurality of conductors, and the first pole pins of the reference units 300 may be connected to each other via a single conductor. Also, the plurality of coupling units 130 may be overlappingly connected to second pole pins of the reference units 300 disposed closest to the fastening units 113 via a plurality of conductors, and the second pole pins of the reference units 300 may be connected to each other via a single conductor.

[0086] The body 113b of the fastening unit 113 coupled to each of the plurality of connecting units 112 may be in contact with the connecting unit 112 and electrically connected thereto.

[0087] 8, an embodiment of connecting the reference unit 300 and the first and second poles of the measuring device 1 in the correction device 10 according to the present invention will be described. The first pole pin protruding from the reference unit 300 may be electrically connected to the connecting unit 112 via an external conductor contacting the body 113b of the fastening unit 113. The second pole pin protruding from the reference unit 300 may be electrically connected to the fixing unit 120 via an external conductor contacting the body 130b of the coupling unit 130.

[0088] However, the present invention is not limited to this, and the external conductors may be directly connected to the fixing unit 120 and the connecting unit 112 .

[0089] 9 and 10 , another embodiment of connecting the reference unit 300 to the first and second poles of the measuring device 1 will be described. The first plate 100 may further include a first connecting unit 160a electrically connecting the mounting part 150 to the connecting unit 112 and a second connecting unit 160b electrically connecting the mounting part 150 to the fixing unit 120. The reference unit 300 may be electrically connected to the connecting unit 112 and the fixing unit 120 via the connecting units 160a and 160b. The first and second pole pins of the reference unit 300 may face the mounting part 150. The first pole pin may be electrically connected to the first connecting unit 160a electrically connected to the connecting unit 112, and the second pole pin may be electrically connected to the second connecting unit 160b electrically connected to the fixing unit 120.

[0090] The connecting units 160a and 160b are arranged inside or on the underside of the first plate 100 along the longitudinal direction of the first plate 100, and can electrically connect the mounting portion 150 and the connecting unit 112, and electrically connect the mounting portion 150 and the fixing unit 120, respectively.

[0091] The connecting units 160a and 160b may include an electrically conductive metal material to allow electricity to flow, such as, but not limited to, one or more of silver, copper, gold, aluminum, and tungsten.

[0092] The connecting units 160a and 160b may include metal members such as conductive wires, metal coatings, or metal pieces, bars, rods, or plates formed with a predetermined thickness and width. When the connecting units include metal pieces, bars, rods, or plates, the cross-sectional area is larger than when connected in the form of a general conductive wire, which reduces electrical resistance and minimizes current flow, thereby minimizing noise input to the impedance spectrum measuring device 1, which outputs signals sensitively even with minute current flows.

[0093] The connecting units 160a, 160b may be in contact with the body 113b of the fastening unit 113 coupled to the first plate 100 and electrically connected to the connecting unit 112, and similarly, may be in contact with the body 130b of the coupling unit 130 coupled to the first plate 100 and electrically connected to the fixing unit 120.

[0094] In another embodiment of the present invention, a correction method for correcting an impedance spectrum measuring device may include the steps of connecting a first pole and a second pole of an impedance spectrum measuring device 1 to a first connecting portion 110 and a second connecting portion 210 of a correction device 10, respectively, applying a current or a voltage as a sinusoidal input signal to a reference unit 300 that electrically connects the first connecting portion 110 and the second connecting portion 210 via the measuring device 1, and outputting an output signal including an impedance spectrum according to the applied input signal. The correction method may further include the step of calculating a correction value by comparing the output signal with a predetermined electrical value of the reference unit, and correcting the measuring device.

[0095] Referring to FIG. 1 , the impedance spectrum measuring device 1 may include a fixture structure 2, and various types of pouch-shaped battery cells C having various sizes may be mounted on the fixture structure 2. A first pole and a second pole of the battery cell C may be mounted on the fixture structure 2 so as to correspond to the first pole and the second pole of the fixture structure 2, respectively. The impedance spectrum measuring device 1 may input a sinusoidal AC voltage and current to the battery cell C, and thereby the measuring device 1 may display an output signal that passes through the battery cell, thereby measuring the impedance value of the battery cell C. The displayed output signal may include a Bode plot, a Nyquist plot, etc.

[0096] However, before measuring the impedance of a battery cell C using the impedance spectrum measuring device 1, it is essential to confirm that the initial value of the impedance spectrum measuring device 1 is set correctly in order to measure the impedance accurately. Therefore, before measuring the impedance of a battery cell C, the correction device 10 according to the present invention is connected to the impedance spectrum measuring device 1, and the impedance of the reference unit 300 connected to the correction device 10 is measured. The measured impedance is then compared with the impedance, which is a predetermined inherent electrical value of the reference unit 300. If the measured impedance matches the inherent electrical value, the initial value of the measuring device 1 can be considered to be set correctly. However, if the measured impedance of the reference unit 300 does not match the inherent electrical value, a correction value can be calculated based on the difference between the values. The calculated correction value can be used to correct the initial value of the measuring device 1.

[0097] Referring to FIG. 2, in yet another embodiment of the present invention, a measuring device assembly may be provided, including an impedance spectrum measuring device 1, a fixture structure 2 electrically connected to a first pole and a second pole of the measuring device, and a compensation device 10 coupled to the fixture structure 2, the compensation device 10 including a first plate 100 including a first connection part 110 electrically connected to the first pole of the impedance spectrum measuring device 1, a second plate 200 including a second connection part electrically connected to the second pole of the measuring device 1, and a reference unit 300 attached to the first plate 100 and having a predetermined electrical value, the first connection part 110 and the second connection part 210 being electrically connected to each other via the reference unit 300. The compensation device 10 coupled to the fixture structure 2 is the same as that described above.

[0098] The jig structure 2 may include a first pole connecting portion 3, a second pole connecting portion 4, and a mounting portion 5.

[0099] The first electrode connector 3 is disposed at one end of the fixture structure 2 and may be electrically connected to the first electrode of the measuring device 1. The first electrode connector 3 may be coupled to and electrically connected to the connection unit 112 of the correction device 10. The first electrode connector 3 may be electrically connected to the reference unit 300 via a four-wire resistance connection method. The first electrode connector 3 may include a first lower plate including an electrically conductive metal material and a plurality of first upper plates. A plurality of connection units 112 may be disposed on the first lower plate, and the plurality of first upper plates may be disposed on upper surfaces of the connection units 112. The first lower plate and the first upper plate may be coupled to and electrically connected to the connection units 112 by pressing the connection units 112 disposed therebetween. The plurality of second upper plates may be spaced apart from each other by a predetermined distance. An electrical insulator may be attached to the lower surface of any one of the plurality of connection units 112 so that the plurality of connection units 112 are not electrically connected to each other via the first lower plate and the four-wire resistance connection method can be maintained. The second electrode connector 4 is disposed at the other end of the fixture structure 2 and may be electrically connected to the second electrode of the measuring device 1. The second electrode connector 4 may be coupled to and electrically connected to the second connector 210 of the correction device 10. The second electrode connector 4 may be electrically connected to the reference unit 300 using a four-wire resistor connection method. The second electrode connector 4 may include a second lower plate including an electrically conductive metal material and a plurality of second upper plates. A plurality of second connectors 210 may be disposed on the second lower plate, and the plurality of second upper plates may be disposed on upper surfaces of the second connectors 210. The second lower plate and the second upper plate may be coupled to and electrically connected to the second connector 210 by pressing the second connector 210 disposed therebetween. The plurality of second upper plates may be spaced apart from each other by a predetermined distance. The plurality of second connecting portions 210 are not electrically connected to each other through the second lower plate, and an electrical insulator may be attached to the lower surface of any one of the plurality of second connecting portions 210 so that the 4-wire resistor connection method can be maintained.

[0100] The mounting portion 5 is disposed between the first electrode connecting portion 3 and the second connecting portion 4, and may be a place for mounting the correction device 10 or the battery cell C. The mounting portion 5 has a flat upper surface, allowing the correction device 10 or the battery cell to be stably mounted thereon.

[0101] Although the present technology has been described above using embodiments, the present technology is not limited thereto. The above embodiments can be modified or changed within the scope without departing from the spirit and scope of the present technology, and those skilled in the art will understand that such modifications and changes also belong to the present technology. [Explanation of symbols]

[0102] 1: Measuring equipment 10: Correction device 100: First plate 110: 1st connection part 111: Support unit 112: Connecting unit 113: Fastening unit 113a: Head section 113b: Torso 120: Fixed unit 130: Coupling unit 130a: Head section 130b: Torso 140: Guide unit 150: Mounting part 200: Second plate 210:Second connection part 220: Connection unit 221: Slide hole 300: Reference unit

Claims

1. A correction device for correcting an impedance spectrum measuring device, comprising: a first plate including a first connection portion electrically connected to a first electrode of the impedance spectrum measuring device; a second plate including a second connection portion electrically connected to a second electrode of the impedance spectrum measuring device; a reference unit attached to the first plate and having a predetermined electrical value; The first connecting portion and the second connecting portion are electrically connected to each other via the reference unit.

2. The correction device according to claim 1 , wherein the reference unit is configured so that an impedance spectrum is measured by the impedance spectrum measuring device.

3. The first plate is The electronic device further includes a fixing unit electrically connected to the first connecting portion through the reference unit, The second plate is The correction device according to claim 1 , further comprising a connection unit in contact with the fixing unit to electrically connect with the second connecting portion.

4. The correction device according to claim 3 , wherein the connection unit abuts the fixed unit.

5. The connection unit has a slide hole formed along its length, The correction device according to claim 3 , wherein a coupling unit is inserted into the slide hole, and the inserted coupling unit is coupled to the fixing unit.

6. 2. The correction device of claim 1, wherein the reference unit is a capacitor.

7. The first plate is The correction device according to claim 1 , further comprising a mounting portion having an accommodation space in which the reference unit is mounted.

8. The first plate is The correction device according to claim 3 , further comprising a guide unit disposed along the length of the first plate and below the connection unit.

9. The correction device according to claim 8 , wherein the height of the guide unit is the same as the height of the fixing unit.

10. The correction device according to claim 3 , wherein the fixing unit and the connecting unit include metal members.

11. A correction method for correcting an impedance spectrum measuring device, comprising: connecting a first pole and a second pole of the impedance spectrum measuring device to a first connecting portion and a second connecting portion of a correction device; applying a sinusoidal input signal to a reference unit that electrically connects the first connection unit and the second connection unit via the impedance spectrum measuring device; and outputting an output signal comprising an impedance spectrum according to the applied input signal.

12. The correction method according to claim 11, further comprising the step of calculating a correction value by comparing the output signal with a predetermined electrical value of the reference unit, and correcting the impedance spectrum measuring device with the correction value.

13. The correction method of claim 11 , wherein the output signal includes at least one of a Bode plot and a Nyquist plot.

14. an impedance spectrum measuring device; a fixture structure electrically connected to the first and second electrodes of the impedance spectrum measuring device; a correction device coupled to the fixture structure; The correction device a first plate including a first connection portion electrically connected to a first electrode of the impedance spectrum measuring device; a second plate including a second connection portion electrically connected to a second electrode of the impedance spectrum measuring device; a reference unit attached to the first plate and having a predetermined electrical value; The first connecting portion and the second connecting portion are electrically connected to each other via the reference unit.

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