Battery measurement equipment using X-rays

Abstract

The present invention is used to analyze the activity of active materials in a state where the battery is actually working to confirm the performance of the active materials of the battery, and in particular, the purpose of the present invention is to provide a battery measuring device using X-rays for measuring the battery by transmitting X-rays through the battery. The battery measuring device using X-rays according to the present invention includes: a first plate that contacts the first battery surface and presses the battery; a second plate that contacts the second battery surface and supports the battery; and a pressing unit for pressing the first plate toward the second plate, wherein a first hole for X-rays to pass through is formed in the first plate, and a second hole for X-rays to pass through is formed in the second plate, and the first hole and the second hole can be formed in a position facing each other.

Description

Technical Field

[0001] This application claims priority to Korean Patent Application No. 10-2019-0050425, filed on April 30, 2019, and Korean Patent Application No. 10-2019-0172991, filed on December 23, 2019, which are hereby incorporated by reference in their entirety.

[0002] The present invention is used to analyze the behavior of active materials in a battery in a state where the battery is actually operating to check the performance of the active materials, and more particularly, to a battery measuring device using X-rays for measuring the battery by passing the X-rays through the battery. Background Art

[0003] Generally, a secondary battery is a battery that can be repeatedly used through a discharge process for converting chemical energy into electrical energy and a reverse charge process, and types of such secondary batteries include nickel-cadmium (Ni-Cd) batteries, nickel-metal hydride (Ni-MH) batteries, lithium metal batteries, lithium-ion (Li-ion) batteries, lithium-ion polymer batteries (Li-ion Polymer Battery), etc. Among these secondary batteries, lithium secondary batteries are commercialized and widely used due to their high energy density and high voltage, long cycle life, and low self-discharge rate.

[0004] The active material in the battery is a material that actually participates in the reaction at the battery electrode, and the performance of the battery (such as battery capacity and voltage, etc.) can be determined by the performance of the active material. Therefore, it is important to analyze the active material in the battery to indicate the performance of the battery.

[0005] Measuring a battery using X-rays may be one of the methods for measuring active materials in a battery. The measurement of a battery may be performed while changing various conditions (e.g., charge and discharge, temperature, voltage, etc.). In this case, gas may be generated in the battery, and if this gas generation causes a voltage drop, a bag expansion phenomenon, etc., an error may occur in the measurement.

[0006] In order to prevent this phenomenon, a jig for pressing the battery can be used. However, the jig is required to have a form consistent with the size and shape corresponding to the type of secondary battery sold for various purposes (EV, ESS, mobile phone, etc.). In other words, since secondary batteries have various sizes such as surface area, thickness, etc., in conventional equipment, the jig must be replaced every time the shape and size of the secondary battery to be inspected changes.

[0007] Korean Patent Registration No. 10-1274730 discloses a technology for an "in-situ battery frame capable of X-ray diffraction analysis". Summary of the invention

[0008] Technical issues

[0009] The present invention is designed to analyze the behavior of active materials in a battery in a state where the battery is actually operating to examine the performance of the active materials, and more specifically, to provide a battery measuring device for measuring a battery by passing X-rays through the battery.

[0010] The objectives to be achieved by the present invention are not limited to the above objectives, and through the following description, ordinary technicians in the field to which the present invention belongs will clearly understand other objectives not mentioned above.

[0011] Technical Solution

[0012] When one face of a battery is defined as a first battery face and the other face of the battery opposite to the first battery face is defined as a second battery face, a battery measuring device using X-rays according to the present invention may include: a first plate for making contact with the first battery face and pressing the battery; a second plate for making contact with the second battery face and supporting the battery; and a pressing unit for pressing the first plate toward the second plate, wherein the first plate may be provided with a first hole formed therein, through which the X-rays pass, the second plate may be provided with a second hole formed therein, through which the X-rays pass, and the first hole and the second hole may be formed at positions facing each other.

[0013] Beneficial Effects

[0014] The battery measuring device using X-rays according to the present invention can be applied to an X-ray measuring system, and more specifically, can be coupled to a battery to suppress battery changes caused by internal gas generated in the battery. In addition, the battery measuring device using X-rays can press the battery by making contact with only one surface of the battery and another surface opposite to the one surface, so the battery measuring device using X-rays is coupled to the battery regardless of the size of the battery.

[0015] Since the battery measuring device using X-rays according to the present invention only needs to press the required area, only a portion of the surface area of ​​the battery can be contacted and pressed. Therefore, even when the clamp is coupled to the battery, the battery can still have an exposed area that is not coupled to the clamp, and these exposed areas can be used to connect accessories such as insulation materials, heaters, charge and discharge terminals, etc., to perform various analyses. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a conceptual diagram schematically showing an X-ray measurement system;

[0017] Figure 2is a perspective view showing a battery measuring device using X-rays according to the present invention;

[0018] Figure 3 is a front view showing a battery measuring device using X-rays according to the present invention;

[0019] Figure 4 is a rear view showing a battery measuring device using X-rays according to the present invention;

[0020] Figure 5 is a plan view showing a state in which the auxiliary pressing unit is spaced apart from the first plate and the second plate; and

[0021] Figure 6 is a plan view showing a state in which the auxiliary pressing unit is coupled to the first plate and the second plate. DETAILED DESCRIPTION

[0022] When one face of a battery is defined as a first battery face and the other face of the battery opposite to the first battery face is defined as a second battery face, a battery measuring device using X-rays according to the present invention may include: a first plate for making contact with the first battery face and pressing the battery; a second plate for making contact with the second battery face and supporting the battery; and a pressing unit for pressing the first plate toward the second plate, wherein the first plate may be provided with a first hole formed therein, through which the X-rays pass, the second plate may be provided with a second hole formed therein, through which the X-rays pass, and the first hole and the second hole may be formed at positions facing each other.

[0023] In the battery measuring device using X-rays according to the present invention, the materials of the first plate and the second plate may include one or more of Al and SUS, the first plate and the second plate may have a thickness of 5 mm to 15 mm, and the first hole and the second hole may have a longitudinal width of 15 mm to 30 mm and a lateral width of 5 mm to 25 mm.

[0024] In a battery measuring device using X-rays according to the present invention, when a surface of a first plate that contacts a battery is defined as a second surface, another surface of the first plate opposite to the second surface is defined as a first surface, a surface of the second plate that contacts the battery is defined as a third surface, and another surface of the second plate opposite to the third surface is defined as a fourth surface, a pressing unit may include: a pressing device for pressing the first surface of the first plate so that the second surface of the first plate presses the battery; a guide plate, the guide plate being located on the first surface side of the first plate and provided with a guide hole, the pressing device being inserted into the guide hole and guided by the guide hole; and a fixing plate, one end of the fixing plate being coupled to the second plate, and the other end of the fixing plate being coupled to the guide plate, so as to fix the second plate and the guide plate in parallel to each other in a state where they are spaced apart from each other.

[0025] In the battery measuring apparatus using X-rays according to the present invention, a spacing distance between the second plate and the guide plate may be 10 mm to 30 mm.

[0026] In the battery measuring apparatus using X-rays according to the present invention, the first plate may be disposed between the guide plate and the second plate such that an edge of one end of the first plate comes into contact with a surface of the fixing plate.

[0027] The battery measuring apparatus using X-rays according to the present invention may further include an auxiliary pressing unit for pressing the first plate and the second plate to be in close contact with the battery at a position different from that of the pressing unit.

[0028] In the battery measuring device using X-rays according to the present invention, the auxiliary pressing unit may include: a second auxiliary plate, the second auxiliary plate being used to contact the fourth surface of the second plate and thereby support the second plate; a first auxiliary plate, the first auxiliary plate being on the first surface side, facing the first surface of the first plate; an auxiliary pressing device, the auxiliary pressing device being used to be inserted into an auxiliary guide hole provided in the first auxiliary plate and to press the first plate toward the battery; and a columnar portion, one end of the columnar portion being coupled to the first auxiliary plate, and the other end of the columnar portion being coupled to the second auxiliary plate, so as to fix the first auxiliary plate and the second auxiliary plate in parallel to each other in a state where they are spaced apart from each other.

[0029] In the battery measuring apparatus using X-rays according to the present invention, a spacing distance between the first auxiliary plate and the second auxiliary plate may be 15 mm to 45 mm.

[0030] In the battery measuring device using X-rays according to the present invention, one end of the pressing device and one end of the auxiliary pressing device can contact the first plate and press the first plate, and a virtual straight line connecting the point where the pressing device contacts the first plate and the point where the auxiliary pressing device contacts the first plate can pass through the first hole.

[0031] Example

[0032] Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the course of this description, for the sake of clarity and convenience of description, the sizes or shapes of the components shown in the accompanying drawings may not be shown to scale. In addition, the terms specifically defined in consideration of the structure and operation of the present invention may vary according to the conventions or intentions of the user or operator. The definitions of these terms should be based on the entire content of this disclosure.

[0033] In the description of the present invention, it should be noted that the directions or positional relationships expressed by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inward", "outward", etc. are based on the directions or positional relationships shown in the accompanying drawings, or based on the directions or positional relationships typically presented when the products of the present invention are used, and are only used for the purpose of illustration and brief description of the present invention, and are not intended to present or imply that the devices or elements shown must have a specific direction and be constructed or operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] In the following, reference will be made to Figures 1 to 6 The structure and function of a battery measuring apparatus using X-rays according to the present invention are described in detail.

[0035] Figure 1 is a conceptual diagram schematically showing an X-ray measurement system. Figure 2 is a perspective view showing a battery measuring apparatus using X-rays according to the present invention. Figure 3 is a front view showing a battery measuring device using X-rays according to the present invention. Figure 4 is a rear view showing a battery measuring device using X-rays according to the present invention. Figure 5 is a plan view illustrating a state in which the auxiliary pressing unit 300 is spaced apart from the first plate 110 and the second plate 120 . Figure 6 1 is a plan view illustrating a state in which the auxiliary pressing unit 300 is coupled to the first plate 110 and the second plate 120 .

[0036] like Figure 1 As shown in FIG. 1 , a system using a battery measuring apparatus using X-rays according to the present invention can irradiate a battery 11 with X-rays through an X-ray light source 13 and receive the X-rays transmitted through the battery 11 at a light receiving unit 15 to analyze the battery 11. For example, in a 2θ scanning measurement method, a wavelength of The light receiving unit 15 can measure the diffraction angle within the range of 5° to 25°.

[0037] The battery 11 to be analyzed may include an electrode assembly and a flexible housing case for accommodating the electrode assembly therein. In the analysis of the battery 11, the X-ray measurement system may analyze the battery 11 in various states while changing variables such as charge and discharge, temperature, voltage, etc. In the case of a flexible housing case, gas may be generated in the electrode assembly while the state of the battery 11 is changed, and the gas generated thereby may expand the housing case, thereby interfering with the analysis of the battery 11.

[0038] The battery measuring device using X-rays according to the present invention can be applied to an X-ray measuring system, and more specifically, can be coupled to the battery 11 to suppress changes in the battery 11 due to internal gas generated in the battery 11. In addition, the battery measuring device using X-rays can press the battery 11 by coming into contact with only one face of the battery 11 and another face opposite to the one face, and thus can be coupled to the battery 11 regardless of the size of the battery.

[0039] In the following description, one surface of the battery 11 is defined as a first battery surface 11 a , and the other surface of the battery 11 opposite to the first battery surface 11 a is defined as a second battery surface 11 b .

[0040] like Figure 2 As shown, the battery measuring device using X-rays according to the present invention may include: a first plate 110 for making contact with the first battery face 11a and pressing the battery 11; a second plate 120 for making contact with the second battery face 11b and supporting the battery 11; and a pressing unit 200 for pressing the first plate 110 toward the second plate 120. In other words, the battery measuring device using X-rays according to the present invention may be in a state where the first plate 110 and the second plate 120 make contact and press only two opposite faces of the battery 11, and the surfaces of the battery 11 other than the faces pressed by the first plate 110 and the second plate 120 are exposed to the outside. Therefore, the size of the battery 11 other than the faces in contact with the first plate 110 and the second plate 120 may not be limited.

[0041] It may be expected that the first plate 110 and the second plate 120 do not transmit short-wavelength X-rays in the area outside the first hole 115 and the second hole 125. Therefore, it may be expected that the first plate 110 and the second plate 120 are made of a high-density metal material. In addition, it may be expected that the first plate 110 and the second plate 120 have excellent properties such as heat resistance, heat dissipation, rigidity, etc., for use in various analysis environments. Therefore, the first plate 110 and the second plate 120 can be a metal including one or more of Al and SUS. The first plate 110 and the second plate 120 can have a thickness of 5mm to 15mm. Materials such as Al, SUS, etc. can effectively block short-wavelength X-rays when the thickness is 5mm to 15mm.

[0042] The first plate 110 may be provided with a first hole 115 formed therein, through which the X-ray passes, and the second plate 120 may be provided with a second hole 125 formed therein, through which the X-ray passes, and the first hole 115 and the second hole 125 may be formed at positions facing each other. For example, the first hole 115 and the second hole 125 may be formed as follows: Figure 3 and 4 The square shown. In a system to which a battery measuring device using X-rays according to the present invention is applied, the X-ray light source 13 is capable of irradiating a wire bundle having a length of 20 mm. The lateral length and longitudinal length of the first hole 115 and the second hole 125 can be determined without reducing the length of the wire bundle, the wavelength of the X-rays, the measurement method, the effective range, and the pressing ability. In other words, if the sizes of the first hole 115 and the second hole 125 are small, the pressing ability may be excellent, but it may be difficult to measure, and if the sizes are large, the interference in the measurement caused by the first plate 110 and the second plate 120 may be reduced, but the pressing ability may be reduced. Therefore, the sizes of the first hole 115 and the second hole 125 can be limited to an appropriate level.

[0043] Specifically, when the wavelength of X-rays is smaller than When an effective 2θ range (5° to 25° of 2θ) is advantageously obtained in the 2θ scanning measurement method, the longitudinal width of the first hole 115 and the second hole 125 can be 15 mm to 30 mm. The transverse width can preferably be similar to the width of the beam irradiated from the X-ray, which can be 5 mm to 25 mm. For example, the first hole 115 and the second hole 125 can be formed to have a longitudinal length of 20 mm and a transverse length of 15 mm.

[0044] For the purpose of description, a surface of the first plate 110 in contact with the battery 11 is defined as a second surface 113, the other surface of the first plate 110 opposite to the second surface 113 is defined as a first surface 111, a surface of the second plate 120 in contact with the battery 11 is defined as a third surface 121, and the other surface of the second plate 120 opposite to the third surface 121 is defined as a fourth surface 123.

[0045] like Figures 5 and 6 As shown, the pressing unit 200 may include: a pressing device 210, the pressing device 210 is used to press the first surface of the first plate 110 so that the second surface 113 of the first plate 110 presses the battery 11; a guide plate 230, the guide plate 230 is located on the first surface 111 side of the first plate 110 and is provided with a guide hole 231, the pressing device 210 is inserted into the guide hole 231 and is guided; and a fixing plate 250, one end of the fixing plate 250 is coupled to the second plate 120, and the other end of the fixing plate 250 is coupled to the guide plate 230 to fix the second plate 120 and the guide plate 230 in parallel with each other in a state where they are spaced apart from each other.

[0046] In other words, the second plate 120 and the guide plate 230 may be parallel to each other and fixed to the fixing plate 250, and the coupling shape of the second plate 120, the guide plate 230 and the fixing plate 250 may be a "" shape, such as Figure 5 and 6 As shown. The guide plate 230, the first plate 110, the battery 11 and the second plate 120 can be stacked in this order, wherein the guide plate 230, the second plate 120 and the fixing plate 250 can be manufactured as one piece. The pressing device 210 can apply force in the direction in which the first plate 110 moves closer to the second plate 120 when the application point of the force for pressing is located on the guide plate 230. Therefore, the guide hole 231 can also be formed to guide the pressing device 210 in a direction perpendicular to the first battery surface 11a. For example, the pressing device 210 can be a bolt. A thread can be formed on the inner circumferential surface of the guide hole 231, and the pressing device 210 can be fastened to the guide hole 231 by a threaded connection. Specifically, the pressing device 210 can be coupled to the guide hole 231 by a threaded connection by applying force with a torque wrench. The torque wrench may apply a force of 0 to 10 kgfcm or less or a force of 5 to 6 kgfcm to the pressing device 210 , thereby coupling the pressing device 210 and the guide hole 231 to each other through the threaded connection.

[0047] In other words, as the pressing device 210 rotates, the pressing device 210 can be further inserted into the guide hole 231 , the pressing device 210 can extend from the surface of the guide plate 230 opposite to the surface into which the pressing device 210 is inserted, and the extended end of the pressing device 210 can press the first plate 110 .

[0048] The spacing distance between the second plate 120 and the guide plate 230 may be 10 mm to 30 mm. The lower limit of the distance between the second plate 120 and the guide plate 230 may be set in consideration of the thickness of the first plate 110 and the thickness of the battery 11. Although there is no limitation on the upper limit thereof, it may be considered at a level to prevent the device from being unnecessarily large.

[0049] The first plate 110 may be disposed between the guide plate 230 and the second plate 120 so that an edge of one end of the first plate 110 may contact the surface of the fixing plate 250. The edge of one end of the first plate 110 may be one of the edges of the first face 111 or the second face 113, and may be an edge further extending toward the periphery or a portion extending most toward the periphery. In order for the X-ray output from the X-ray light source 13 to reach the light receiving unit 15, the first hole 115 and the second hole 125 must be aligned. Therefore, the first plate 110 may always have to press the position based on the second plate 120. By aligning the first plate 110 at an appropriate position relative to the fixing plate 250 coupled as one body with the second plate 120, the first plate 110 may be aligned at an appropriate position relative to the second plate 120. Specifically, by arranging the position of the first hole 115 formed in the first plate 110 based on the edge in contact with the fixing plate 250 and by contacting the edge of the first plate 110 with the fixing plate 250, the first hole 115 and the second hole 125 may be aligned.

[0050] like Figures 5 and 6 As shown, the battery measuring device using X-rays according to the present invention may further include an auxiliary pressing unit 300 for pressing the first plate 110 and the second plate 120 to be in close contact with the battery 11 at a position different from that of the pressing unit 200. For example, the pressing unit 200 may press the first plate 110 at one end side of the first plate 110, and the auxiliary pressing unit 300 may press the first plate 110 at the other end side of the first plate 110.

[0051] The auxiliary pressing unit 300 may include: a second auxiliary plate 340, the second auxiliary plate 340 is used to contact the fourth surface 123 of the second plate 120 and thereby support the second plate 120; a first auxiliary plate 330, the first auxiliary plate 330 is on the side of the first surface 111, facing the first surface 111 of the first plate 110; an auxiliary pressing device 310, the auxiliary pressing device 310 is used to be inserted into the auxiliary guide hole 331 set in the first auxiliary plate 330 and to press the first plate 110 toward the battery 11; and a columnar portion 350, one end of the columnar portion 350 is coupled to the first auxiliary plate 330, and the other end of the columnar portion 350 is coupled to the second auxiliary plate 340, so as to fix the first auxiliary plate 330 and the second auxiliary plate 340 in parallel with each other in a state where the first auxiliary plate 330 and the second auxiliary plate 340 are spaced apart from each other.

[0052] The first auxiliary plate 330 and the second auxiliary plate 340 may be parallel to each other and fixed to the columnar portion 350, and the coupling shape of the first auxiliary plate 330, the second auxiliary plate 340 and the columnar portion 350 may be a "" shape, such as Figure 5 and Figure 6 As shown. The first auxiliary plate 330, the first plate 110, the battery 11, the second plate 120, and the second auxiliary plate 340 can be stacked in this order, wherein the first auxiliary plate 330, the second auxiliary plate 340, and the columnar portion 350 can be manufactured as one body. The auxiliary pressing unit 300 can have a body separated from the first plate 110, the second plate 120, and the pressing unit 200. Therefore, the auxiliary pressing unit 300 can be freely detached from the first plate 110 and the second plate 120 and freely coupled to the first plate 110 and the second plate 120. The coupling position of the auxiliary pressing unit 300 can be freely set according to the shape and size of the battery 11.

[0053] The auxiliary pressing device 310 can apply force in a direction in which the first plate 110 moves closer to the second plate 120 in a state where the application point of the force for pressing is located on the first auxiliary plate 330. Therefore, the auxiliary guide hole 331 can also be formed to guide the auxiliary pressing device 310 in a direction perpendicular to the first battery surface 11a. For example, the auxiliary pressing device 310 can be a bolt. A thread can be formed on the inner circumferential surface of the auxiliary guide hole 331, and the auxiliary pressing device 310 can be fastened to the auxiliary guide hole 331 by threading. Specifically, the auxiliary pressing device 310 can be coupled to the auxiliary guide hole 331 by threading by bearing force with a torque wrench. The torque wrench can apply a force of 0kgfcm to 10kgfcm or less or a force of 5kgfcm to 6kgfcm to the auxiliary pressing device 310, thereby coupling the auxiliary pressing device 310 and the auxiliary guide hole 331 by threading.

[0054] In other words, as the auxiliary pressing device 310 rotates, the auxiliary pressing device 310 can be further inserted into the auxiliary guide hole 331, the auxiliary pressing device 310 can extend from the surface opposite to the surface of the first auxiliary plate 330 for inserting the auxiliary pressing device 310, and the extended end of the auxiliary pressing device 310 can press the first plate 110.

[0055] The spacing distance between the first auxiliary plate 330 and the second auxiliary plate 340 may be 15 mm to 45 mm. The first plate 110, the second plate 120, and the battery 11 may be inserted between the first auxiliary plate 330 and the second auxiliary plate 340, and the distance between the first auxiliary plate 330 and the second auxiliary plate 340 may be determined in consideration of the thickness of the first plate 110, the second plate 120, and the battery 11.

[0056] One end of the pressing device 210 and one end of the auxiliary pressing device 310 may simultaneously contact and press the first plate 110. In other words, the first plate 110 may be pressed through two pressure points.

[0057] like Figure 3 As shown, an imaginary straight line connecting the point where the pressing device 210 contacts the first plate 110 and the point where the auxiliary pressing device 310 contacts the first plate 110 may pass through the first hole 115. By setting the pressing positions of the pressing device 210 and the auxiliary pressing device 310 in this manner, the first plate 110 may be prevented from being lifted from the battery 11 around the first hole 115.

[0058] The pressing device 210 and the auxiliary pressing device 310 can be threadedly connected by a torque wrench, and are respectively coupled to the guide hole 231 and the auxiliary guide hole 331 with a force of 3kgfcm to 5kgfcm when the battery 11 is a single battery, and are respectively coupled to the guide hole 231 and the auxiliary guide hole 331 with a force of 6kgfcm to 7kgfcm when the battery 11 is a dual battery.

[0059] When the end of the pressing device 210 and the end of the auxiliary pressing device 310 apply force to the first plate 110 at two points, the first plate 110 can be subjected to the force from the pressing device 210 and the auxiliary pressing device 310, and press the battery 10 with a uniform pressure. 2 Up to 2700mm 2 The corresponding total surface area.

[0060] Although the embodiments according to the present invention have been described above, they are only for illustration, and those skilled in the art will appreciate that various modifications and equivalent embodiments may be made therefrom. The true scope of the technical protection of the present invention shall be defined by the appended claims.

[0061] Industrial Applicability

[0062] The battery measuring device using X-rays according to the present invention can be applied to an X-ray measuring system, and more specifically, can be coupled to a battery to suppress battery changes caused by internal gas generated in the battery. In addition, the battery measuring device using X-rays can press the battery by contacting only one face of the battery and another face opposite to the one face, and thus can be coupled to the battery regardless of the size of the battery.

[0063] Since the battery measuring device using X-rays according to the present invention only needs to press the required area, only a portion of the surface area of ​​the battery can be contacted and pressed. Therefore, even when the clamp is coupled to the battery, the battery can still have an exposed area that is not coupled to the clamp, and these exposed areas can be used to connect auxiliary components such as insulation materials, heaters, charge and discharge terminals, etc. for various analyses.

Claims

1. A battery measuring device using X-rays, wherein when one surface of a battery is defined as a first battery surface and another surface of the battery opposite to the first battery surface is defined as a second battery surface, the battery measuring device comprises: A first plate, the first plate being used to contact the first battery surface and press the battery; a second plate, the second plate being used to contact the second battery surface and support the battery; as well as A pressing unit is used to press the first plate toward the second plate, wherein: The first plate is provided with a first hole formed in the first plate, and the X-ray passes through the first hole, The second plate is provided with a second hole formed in the second plate, and the X-ray passes through the second hole, The first hole and the second hole are formed at positions facing each other, and The battery measuring device further includes: an auxiliary pressing unit for pressing the first plate and the second plate into close contact with the battery at a position different from that of the pressing unit, wherein the auxiliary pressing unit has a body separated from the first plate, the second plate and the pressing unit, Wherein, when a surface of the first plate for making contact with the battery is defined as the second surface, Another surface of the first plate opposite to the second surface is defined as a first surface, One surface of the second plate for making contact with the battery is defined as a third surface, and When the other surface of the second plate opposite to the third surface is defined as a fourth surface, The pressing unit comprises: A pressing device, the pressing device is used to press the first surface of the first plate, so that the second surface of the first plate presses the battery; a guide plate located on the first surface side of the first plate and provided with a guide hole into which the pressing device is inserted and guided; and a fixing plate, one end of which is coupled to the second plate, and the other end of which is coupled to the guide plate, so as to fix the second plate and the guide plate in parallel with each other in a state where they are spaced apart from each other, Wherein, the auxiliary pressing unit comprises: a second auxiliary plate, the second auxiliary plate being used to contact the fourth surface of the second plate so as to support the second plate; a first auxiliary plate facing the first surface on the first surface side of the first plate; an auxiliary pressing device for being inserted into an auxiliary guide hole provided in the first auxiliary plate and for pressing the first plate toward the battery; and A columnar portion having one end coupled to the first auxiliary plate and the other end coupled to the second auxiliary plate to fix the first auxiliary plate and the second auxiliary plate in parallel with each other in a state of being spaced apart from each other.

2. The battery measuring device using X-rays according to claim 1, wherein The materials of the first plate and the second plate include one or more of Al and SUS, The first plate and the second plate have a thickness of 5 mm to 15 mm, and The first hole and the second hole have a longitudinal width of 15 mm to 30 mm and a lateral width of 5 mm to 25 mm.

3. The battery measuring device using X-rays according to claim 1, wherein The spacing distance between the second plate and the guide plate is 10 mm to 30 mm.

4. The battery measuring device using X-rays according to claim 1, wherein The first plate is disposed between the guide plate and the second plate such that an edge of one end of the first plate comes into contact with a surface of the fixing plate.

5. The battery measuring device using X-rays according to claim 1, wherein The spacing distance between the first auxiliary plate and the second auxiliary plate is 15 mm to 45 mm.

6. The battery measuring device using X-rays according to claim 1, wherein One end of the pressing device and one end of the auxiliary pressing device come into contact with the first plate and press the first plate, and An imaginary straight line connecting a point where the pressing device comes into contact with the first plate and a point where the auxiliary pressing device comes into contact with the first plate passes through the first hole.

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