Characterization jig for secondary battery cells and measuring apparatus including the same

Abstract

To provide a device for measuring the characteristics of battery cells with which it is possible to minimize the impact of inductance when measuring the impedance of the battery cells.SOLUTION: A characteristics measurement jig according to the present disclosure comprises: a support table on which a battery cell is placed; an impedance measurement unit attached and removed to and from the cathode and anode terminals of the battery cell; and an elevating unit for lifting and lowering the impedance measurement unit. The impedance measurement unit includes a first and a second contact for the cathode contacted with the cathode terminal, a first and a second contact for the anode arranged facing the first and second contacts for the cathode, a first and a second current terminal for applying a current to the battery cell, and a first and a second voltage terminal for measuring the voltage of the battery cell. The elevating unit is constituted to lift and lower the first and second contacts for the cathode or the first and second contacts for the anode to and from the battery cell. The first current terminal is located facing the first voltage terminal, and the second current terminal is located facing the second voltage terminal.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to an apparatus for measuring characteristics of a battery cell, and more particularly to an apparatus for measuring the impedance of a battery cell.

Background Art

[0002] A rechargeable battery is different from a primary battery in that it can be repeatedly charged and discharged. Small-sized rechargeable batteries are used in portable electronic devices such as mobile phones, laptop computers, and camcorders. Large-capacity and high-density rechargeable batteries are used as power sources for driving motors in hybrid vehicles and electric vehicles, and for energy storage.

[0003] Such rechargeable batteries can be provided to consumers after undergoing characteristic inspections for stability and performance with respect to the battery cells. One of the characteristic inspections is an impedance inspection of the battery cells of the rechargeable battery.

[0004] When measuring the impedance of a battery cell, it is important to prevent distortion in the measured impedance due to an increase in inductance according to the structure and arrangement of measurement equipment components (e.g., current lines, voltage lines).

[0005] The above-described information disclosed in the background art of the invention is for deepening the understanding of the background of the present invention and may also include information that does not constitute the prior art.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention provides a battery cell characteristic measurement apparatus capable of minimizing the influence of inductance when measuring the impedance of a battery cell.

[0007] However, the technical problems that the present invention aims to solve are not limited to those described above, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention below. [Means for solving the problem]

[0008] A characteristic measuring jig for a secondary battery cell according to one embodiment of the present invention includes a support base on which a battery cell including positive and negative terminals is provided, an impedance measuring unit that is attached to and detached from the positive and negative terminals of the battery cell, and a lifting unit connected to the impedance measuring unit, fixed to the support base, and configured to raise and lower the impedance measuring unit.

[0009] The impedance measuring unit includes a first positive electrode contact portion and a second positive electrode contact portion that contact the positive electrode terminal, a first negative electrode contact portion and a second negative electrode contact portion that contact the negative electrode terminal and are arranged opposite to the first positive electrode contact portion and the second positive electrode contact portion, a first current terminal connected to the first positive electrode contact portion for applying current to the battery cell, a first voltage terminal connected to the second positive electrode contact portion for measuring the voltage of the battery cell, a second current terminal connected to the first negative electrode contact portion for applying current to the battery cell, and a second voltage terminal connected to the second negative electrode contact portion for measuring the voltage of the battery cell.

[0010] The lifting mechanism is connected to the first positive electrode contact, the second positive electrode contact, or the first negative electrode contact, the second negative electrode contact, and is configured to raise and lower the first and second positive electrode contacts or the first and second negative electrode contacts relative to the battery cell.

[0011] The first current terminal is positioned opposite the first voltage terminal, and the second current terminal is positioned opposite the second voltage terminal.

[0012] The impedance measuring unit may include a first body to which the first and second positive electrode contact portions, the first current terminal, and the first voltage terminal are coupled, and a second body to which the first and second negative electrode contact portions, the second current terminal, and the second voltage terminal are coupled.

[0013] The first current terminal and the first voltage terminal can be arranged on the first body on the same line but not superimposed.

[0014] The second current terminal and the second voltage terminal can be arranged on the second body on the same line but not superimposed.

[0015] The width of the first positive electrode contact area may be the same as or greater than the width of the second positive electrode contact area.

[0016] The area of ​​the first negative electrode contact portion may be the same as or larger than the area of ​​the second negative electrode contact portion.

[0017] The second main body is fixedly installed on the support base, and the first main body is connected to the lifting mechanism.

[0018] The support base includes a base plate and a vertical plate extending from one side of the base plate, and the second body is positioned on the base plate.

[0019] The aforementioned battery cell may be cylindrical in shape.

[0020] Another embodiment of the present invention provides a characteristic measuring device for a secondary battery cell, which includes a housing having a chamber that houses the aforementioned measuring jig and is provided with current lines for applying current to the first current terminal and the second current terminal, and voltage lines for sensing the voltage of the battery cell from the first voltage terminal and the second voltage terminal.

[0021] According to an embodiment of the present invention, the current terminal and voltage terminal of the measuring jig are arranged in a non-superimposed manner, thereby reducing the inductance when measuring the impedance of a battery cell.

[0022] This reduces the resistance that obstructs the flow of current, and can improve the distortion of the impedance of the measured battery cell.

Brief Description of the Drawings

[0023] The drawings attached to this specification illustrate preferred embodiments of the present invention and serve to better understand the technical idea of the present invention together with the detailed description of the invention to be described later. Therefore, the present invention should not be construed as being limited only to the matters described in such drawings. [Figure 1] It is a perspective view schematically showing a battery cell characteristic measuring device for a secondary battery according to an embodiment. [Figure 2] It is a perspective view schematically showing a measurement jig according to an embodiment. [Figure 3] It is a partially enlarged view of FIG. 2. [Figure 4] It is a perspective view showing a battery cell according to an embodiment [Figure 5a] It is a drawing shown to explain an impedance measurement unit according to an embodiment. [Figure 5b] It is a drawing shown to explain an impedance measurement unit according to an embodiment. [Figure 5c] It is a drawing shown to explain an impedance measurement unit according to an embodiment. [Figure 5d] It is a drawing shown to explain an impedance measurement unit according to an embodiment. [Figure 6a] It is a graph shown to explain the effect of the measurement jig according to an embodiment. [Figure 6b] It is a graph shown to explain the effect of the measurement jig according to an embodiment.

Mode for Carrying Out the Invention

[0024] Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. Prior to this, terms and words used herein and in the claims should not be interpreted in a manner limited to their usual or dictionary meanings, but rather in a manner consistent with the technical idea of ​​the present invention, based on the principle that inventors may appropriately define the concepts of terms in order to best describe their invention. Accordingly, it should be understood that the embodiments described herein and the configurations shown in the drawings represent only some of the most preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and that there may be various equivalents and modifications that replace them at the time of filing.

[0025] Furthermore, as used herein, “comprise, include” and / or “comprising, including” identify the presence of the shapes, figures, stages, actions, members, elements and / or groups thereof mentioned, and do not exclude the presence or addition of one or more other shapes, figures, actions, members, elements and / or groups.

[0026] Furthermore, to aid in understanding the invention, the attached drawings may not be shown to actual scale, and the dimensions of some components may be exaggerated. Also, the same component may be given the same reference numeral in different embodiments.

[0027] When two things being compared are described as "the same," it means they are "substantially the same." Therefore, being substantially the same can include having deviations that are considered low in the industry, for example, deviations of 5% or less. Furthermore, the uniformity of certain parameters within a given domain can mean uniformity from an average perspective.

[0028] Even if terms like "first," "second," etc., are used to describe various components, these components are certainly not limited by these terms. These terms are simply used to distinguish one component from another, and unless otherwise stated, the first component may be the second component.

[0029] Throughout the specification, unless otherwise stated, each component may be singular or plural.

[0030] The placement of any configuration "above (or below)" or "above (or below)" a component can mean not only that the configuration is placed in contact with the upper (or lower) surface of the component, but also that another configuration may be interposed between the component and any configuration placed on (or below) it.

[0031] Furthermore, when one component is described as being "on," "connected to," or "coupled to" another component, it should be understood that the components may be directly connected to or linked to one another, but may also be "interposed" between them by other components, or each component may be "connected," "coupled," or "linked" through other components.

[0032] As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items. Furthermore, the use of “may” when describing embodiments of this disclosure refers to “one or more embodiments of this disclosure.” Expressions such as “one or more” and “one or more” preceding an element list modify the entire element list, not individual elements of the list.

[0033] Throughout the specification, "A and / or B" means A, B, or A and B unless otherwise specified, and "C to D" means C or greater and D or less unless otherwise specified.

[0034] When syntax such as "at least one of A, B, and C", "at least one of A, B, or C", "at least one selected from the group A, B, and C", or "at least one selected from A, B, and C" is used to specify a catalog of elements A, B, and C, the syntax can refer to any suitable combination.

[0035] The term “use” can be considered synonymous with the term “utilize.” As used herein, “substantially,” “about,” and similar terms may be used as approximations rather than terms of degree, to account for the intrinsic variability of measured or calculated values ​​as perceived by an ordinary person skilled in the art.

[0036] In this specification, terms such as first, second, third, etc., may be used to describe various elements, components, regions, layers, and / or sections, but these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, drawing layer, or section from other elements, components, regions, drawing layers, or sections. Accordingly, the first elements, components, regions, layers, or sections discussed below may be named second elements, components, regions, layers, or sections without departing from the teachings of the exemplary embodiments.

[0037] As illustrated in the drawings, spatially relative terms such as “beneath,” “below,” “lower,” “above,” and “upper” may be used herein to describe the relationship between one element or feature and another element or feature, in order to facilitate explanation. Spatially relative positions will be understood to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figure. For example, if the device in the drawing is inverted, an element described as “beneath” or “below” will be understood as “above” or “upper” of another element. Thus, the term “beneath” can encompass both the aforementioned up and down directions.

[0038] The terms used herein are for the purpose of describing the embodiments of this disclosure and are not intended to limit this disclosure.

[0039] In the exemplary embodiments of prismatic and pouch-type secondary batteries relating to the embodiments of this disclosure, one of the prismatic and pouch-type secondary batteries is selected and described as having a general structure, and in the case of generally applicable technology, the general structure of the prismatic and pouch-type secondary battery is described.

[0040] Figure 1 is a schematic perspective view of a battery cell characteristic measuring device for secondary batteries according to an embodiment of the present invention (hereinafter referred to as the measuring device for convenience).

[0041] The measuring device 1 is configured to measure the characteristics of a secondary battery via a battery cell characteristic measuring jig 3 (hereinafter referred to as the measuring jig for convenience) placed inside the measuring chamber 10. In this embodiment, the measuring jig 3 is configured to measure the impedance of the battery cell.

[0042] The measurement chamber 10 can be provided in multiple configurations by a frame 14 placed inside the main body 12 of the measuring device 1 and a separation plate 16 connected to this frame 14.

[0043] Furthermore, the main body 12 of the measuring device 1 is equipped with an operation panel 18 for electrical operations such as adjusting the temperature and humidity inside the measuring chamber 10 and applying current to the battery cell 5 in order to measure the impedance of the battery cell 5 provided to the measuring jig 3.

[0044] Furthermore, the measurement chamber 10 is provided with current lines (not shown) for applying current to the battery cell 5 and voltage lines (not shown) for sensing voltage from the battery cell 5, which are electrically connected to the measurement jig 3.

[0045] Figure 2 is a schematic perspective view of a measuring jig according to an embodiment, and Figure 3 is a partial enlargement view of Figure 2. As shown in Figures 2 and 3, the measuring jig 3 of the embodiment includes a support base 30 on which the battery cell 5 is placed.

[0046] In this embodiment, the battery cell 5 may be a cylindrical battery cell, as can be further seen from Figure 4. The battery cell 5 is constructed by housing an electrode assembly including a positive electrode, a negative electrode, and a separator plate within a cylindrical case 50a, and sealing the opening of the case 50a with a cap assembly 52a that is electrically connected to the positive electrode. A portion protruding from the cap assembly 52a, such as a cap included in the cap assembly 52a, is the positive electrode terminal 520a of the battery cell 5, and a portion of the case 50a that is electrically connected to the negative electrode of the electrode assembly (e.g., the bottom of the case) can function as the negative electrode terminal 500a of the battery cell 5.

[0047] Referring again to Figures 2 and 3, the support base 30 on which the battery cell 5 is placed for impedance measurement includes a base plate 300a and a vertical plate 302a extending from one side edge of the base plate 300a. The vertical plate 302a houses the first section of the impedance measuring unit 34 for measuring the impedance of the battery cell 5 (e.g., the positive electrode contact and first terminal, which will be described later), and the base plate 300a houses the second section of the impedance measuring unit 34 (e.g., the negative electrode contact and second terminal, which will be described later).

[0048] The number of impedance measuring units 34 arranged on the support base 30, in other words, the number of battery cells 5, can be appropriately adjusted. In this embodiment, each of the two impedance measuring units 34 is provided with a battery cell 5 (only one battery cell is shown in Figure 2 for convenience), but this does not limit the structure of the measuring jig 3.

[0049] Furthermore, a lifting mechanism 36 is fixedly positioned on the vertical plate 302a, which is configured to allow the first section of the impedance measuring unit 34 to be raised and lowered while being attached to and detached from the terminals of the battery cell 5, for example, the positive terminal 520a.

[0050] The impedance measuring unit 34 includes a positive contact portion 340a that contacts the positive terminal 520a and a negative contact portion 342a that contacts the negative terminal 500a.

[0051] Figures 5a to 5d are diagrams illustrating the positive electrode contact portion 340a. Referring to Figures 5a to 5d, the positive electrode contact portion 340a includes a first body 3400a which is substantially rectangular in shape. The first body 3400a includes a lower body 3402a and an upper body 3404a which can be attached to and detached from each other. The lower body 3402a is provided with first and second positive electrode contact portions 3406a and 3408a which contact the positive electrode terminal 520a, respectively, at arbitrary intervals. The tips of the first and second positive electrode contact portions 3406a and 3408a are exposed outside the lower body 3402a and are provided on the lower body 3402a so as to be able to move up and down within the lower body 3402a.

[0052] The first positive electrode contact portion 3406a and the second positive electrode contact portion 3408a are connected to the first current terminal 3410a and the first voltage terminal 3412a, respectively. The first current terminal 3410a is connected to the first positive electrode contact portion 3406a, so that current (AC) is applied to the battery cell 5. The first voltage terminal 3412a is connected to the second positive electrode contact portion 3408a, so that a voltage can be measured from the battery cell 5.

[0053] In this embodiment, the first current terminal 3410a and the first voltage terminal 3412a each include opposing rod-shaped lead portions 3414a and 3416a, and cylindrical connecting portions 3418a and 3420a that are perpendicularly connected from one end of the lead portions 3414a and 3416a.

[0054] In this embodiment, both lead portions 3414a and 3416a are arranged parallel to each other on non-collinear planes. That is, with the first positive electrode contact portion 3406a and the second positive electrode contact portion 3408a positioned approximately in the center of the first body 3400a, both lead portions 3414a and 3416a are arranged on the first body 3400a such that their respective connection portions 3418a and 3420a are positioned opposite each other. As a result, the angle between the two lead portions 3414a and 3416a, in other words, the angle between the first current terminal 3410a and the first voltage terminal 3412a, can be seen as 180°. This arrangement of the first current terminal 3410a and the first voltage terminal 3412a is effective in preventing distortion of the measured impedance by minimizing the overlapping region between the two terminals and reducing the increase in inductance due to the magnetic field.

[0055] In this embodiment, the two lead portions 3414a and 3416a are arranged not on the same line as described above, but in other embodiments, the two lead portions can also be arranged on the same line.

[0056] Furthermore, in this embodiment, the two lead portions 3414a and 3416a are arranged at an angle of 180° as described above, but they can also be arranged at an angle selected between 90° and 180°.

[0057] A current line (not shown) for applying current to the first current terminal 3410a and a voltage line (not shown) for sensing the voltage of the battery cell 5 from the first voltage terminal 3412a are connected to the connection parts 3418a and 3420a, respectively.

[0058] Parts of the lead portions 3414a and 3416a, including the connecting portions 3418a and 3420a, are exposed outside the first body 3400a, while the remaining parts of the lead portions 3414a and 3416a, including the first positive electrode contact portion 3406a and the second positive electrode contact portion 3408a connected to the other end of the lead portions 3414a and 3416a, are located inside the first body 3400a.

[0059] At the other end of the lead portions 3414a and 3416a to which the first positive electrode contact portion 3406a and the second positive electrode contact portion 3408a are connected, springs 3422a and 3424a are installed facing the first and second positive electrode contact portions 3406a and 3408a. These springs 3422a and 3424a enable the first and second positive electrode contact portions 3406a and 3408a to elastically contact the positive electrode terminal 520a due to the force exerted by the lifting mechanism described later.

[0060] In this embodiment, the area of ​​the first positive electrode contact portion 3406a may be the same as or larger than the area of ​​the second positive electrode contact portion 3408a. This is to reduce the contact resistance of the current terminals and decrease the heat generated when actual current flows.

[0061] On the other hand, the negative electrode contact portion 342a is configured similarly to the positive electrode contact portion 340a. That is, the negative electrode contact portion 342a can also include a second body (lower body / upper body), first and second negative electrode contact portions, a second current terminal (lead portion and connection portion), a second voltage terminal (lead portion and connection portion), and a spring. Here, the first and second negative electrode contact portions contact the negative electrode terminal 500a of the battery cell 5. A detailed explanation of this will be replaced by the explanation of the positive electrode contact portion 340a mentioned above.

[0062] The impedance measuring unit 34 configured in this way is connected to a lifting unit 36 ​​fixedly installed on the vertical plate 302a of the support base 30, so as to be able to move up and down.

[0063] As can be seen from Figure 2, in this embodiment, the lifting unit 36 ​​is configured to allow the positive electrode contact portion 340a to be raised and lowered by a screw mechanism.

[0064] To this end, the lifting section 36 includes a pressing section 360a connected (e.g., screw-connected) to a positive electrode contact section 340a, a lifting shaft 362a connected to the pressing section 360a and provided with screw threads, a base 364a fixed to a vertical plate 302a and coupled to allow the lifting shaft 362a to be raised and lowered and guided by a screw mechanism, and a handle section 366a coupled to one end of the lifting shaft 362a. Meanwhile, the negative electrode contact section 342a is fixed to the bottom plate 300a of the support base 30.

[0065] As a result, with the battery cell 5 placed on the negative electrode contact portion 342a so that the negative electrode terminal 500a of the battery cell 5 is in contact with the first and second negative electrode contact portions, when the user rotates the handle portion 366a clockwise, the lifting shaft 362a descends, and in conjunction with it, the pressing portion 360a and the positive electrode contact portion 340a also descend.

[0066] As a result, the first positive electrode contact portion 3406a and the second positive electrode contact portion 3408a can contact the positive electrode terminal 520a of the battery cell 5. In this state, current can be applied to the first current terminal 3410a and the second terminal, and the impedance of the battery cell 5 can be measured by sensing the voltage through the first voltage terminal 3412a and the second terminal. At this time, the first current terminal 3410a and the first voltage terminal 3412a are arranged substantially in a straight line so as not to overlap each other, and the second current terminal and the second voltage terminal are also arranged substantially in a straight line so as not to overlap each other, so the increase in inductance due to the magnetic field can be reduced, and the impedance of the battery cell 5 can be measured without distortion.

[0067] Once the impedance measurement is complete, the user can rotate the handle 366a counterclockwise so that the first positive electrode contact 3406a and the second positive electrode contact 3408a are separated from the positive terminal 520a of the battery cell 5, and the first and second negative electrode contacts are separated from the negative terminal 500a of the battery cell 5. Subsequently, the battery cell whose impedance measurement has been completed is replaced with a new battery cell whose impedance measurement is to be performed.

[0068] On the other hand, in this embodiment, it was illustrated that the positive electrode contact portion 340a is raised and lowered by the lifting portion 36 and the negative electrode contact portion 342a is fixed to the support base 30, but the reverse is also possible. That is, it is also possible that the negative electrode contact portion 342a is raised and lowered by the lifting portion 36 and the positive electrode contact portion 340a is fixed to the support base 30.

[0069] Figures 6a and 6b are graphs showing the results of measuring the charge exchange resistance (Rct) and inductance of a battery cell using the measurement jig according to the embodiment and the measurement jig according to the comparative example, respectively. In the case of the measurement jig according to the comparative example, the first and second current terminals and the first and second voltage terminals for the positive and negative terminals of the battery cell are configured to overlap and form a single unit, unlike in the embodiment. The battery cell measured with each measurement jig is the cylindrical battery cell shown in Figure 4.

[0070] As can be seen from Figures 6a and 6b, when measuring the impedance of a battery cell using the measurement fixture in the embodiment, the improved current and voltage terminals reduce inductance, allowing the impedance to be measured without (or with reduced) distortion of the charge exchange resistance (Rct).

[0071] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it goes without saying that various modifications and variations are possible within the equivalent scope of the technical concept of the present invention and the claims described below by persons with ordinary skill in the art to which the present invention pertains. [Explanation of Symbols]

[0072] 3: Measuring jig 5: Battery cell 30: Support stand 34: Impedance measurement section 36: Elevator 340a: Positive electrode contact part 342a: Negative electrode contact part 3406a: First positive electrode contact part 3408a: Contact part for second positive electrode 3410a: 1st terminal for current 3412a: Voltage terminal 1 3414a, 3416a: Lead section 3418a, 3420a: Connection part

Claims

1. A support base is provided which a battery cell including positive and negative terminals is provided, An impedance measuring unit that is detachable from the positive and negative terminals of the battery cell, including a first positive electrode contact portion that contacts the positive electrode terminal, a second positive electrode contact portion that contacts the negative electrode terminal and is positioned opposite to the first positive electrode contact portion and the second positive electrode contact portion, a first negative electrode contact portion that contacts the negative electrode terminal and is positioned opposite to the first positive electrode contact portion and the second positive electrode contact portion, a first current terminal connected to the first positive electrode contact portion and for applying current to the battery cell, a first voltage terminal connected to the second positive electrode contact portion and for measuring the voltage of the battery cell, a second current terminal connected to the first negative electrode contact portion and for applying current to the battery cell, and a second voltage terminal connected to the second negative electrode contact portion and for measuring the voltage of the battery cell, A lifting mechanism is fixed to the support base and connected to the first positive electrode contact portion, the second positive electrode contact portion, or the first negative electrode contact portion, the second negative electrode contact portion, and is configured to raise and lower the first positive electrode contact portion, the second positive electrode contact portion, or the first negative electrode contact portion, the second negative electrode contact portion relative to the battery cell. Includes, The first current terminal is positioned opposite the first voltage terminal, and the second current terminal is positioned opposite the second voltage terminal. The impedance measuring unit is The first positive electrode contact portion, the second positive electrode contact portion, the first current terminal, and the first voltage terminal are connected to a first body, A characterization jig for a secondary battery cell, wherein the first current terminal and the first voltage terminal are arranged in the first main body parallel to each other and on different straight lines.

2. The impedance measuring unit is The first negative electrode contact portion, the second negative electrode contact portion, the second current terminal, and the second voltage terminal are connected to a second body. A jig for measuring the characteristics of a battery cell for a secondary battery according to claim 1, including the features of a battery cell for a secondary battery.

3. The characteristic measuring jig for a secondary battery cell according to claim 2, wherein the second current terminal and the second voltage terminal are arranged in the second body parallel to each other and on different straight lines.

4. The characteristic measuring jig for a secondary battery cell according to claim 1, wherein the area of ​​the first positive electrode contact portion is the same as or larger than the area of ​​the second positive electrode contact portion.

5. The characteristic measuring jig for a secondary battery cell according to claim 1, wherein the area of ​​the first negative electrode contact portion is the same as or larger than the area of ​​the second negative electrode contact portion.

6. The characteristic measuring jig for a secondary battery cell according to claim 2, wherein the second main body is fixedly installed on the support base and the first main body is connected to the lifting section.

7. The support base includes a bottom plate and a vertical plate extending from one side of the bottom plate, and the second body is positioned on the bottom plate, wherein this is the characteristic measuring jig for a secondary battery cell according to claim 2.

8. The battery cell is cylindrical, the characteristic measuring jig for a secondary battery according to claim 1.

9. A battery cell characteristic measuring device for a secondary battery, comprising a housing having a chamber that accommodates a measuring jig according to any one of claims 1 to 8, and which is provided with current lines for applying current to the first current terminal and the second current terminal, and voltage lines for sensing the voltage of the battery cell from the first voltage terminal and the second voltage terminal.

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