Battery cell detection device, battery cell detection method and battery cell detection system

Abstract

The cell detection device according to an embodiment of the present invention may comprise: a cell detection unit for detecting a cell; the plurality of battery cell accommodating parts are used for receiving battery cells from the outside, the plurality of battery cell accommodating parts are arranged at intervals, and the battery cell detection part is positioned among the plurality of battery cell accommodating parts; and a table including a first portion and a second portion on which the cells supplied to the cell accommodating portions are disposed, the table reciprocating between the plurality of cell accommodating portions to move the cells supplied to the cell accommodating portions, the table moving the cells supplied to the cell accommodating portions while the second portion on which the cells are disposed is located in the cell detection portion, and the table moving the cells supplied to the cell accommodating portions while the second portion on which the cells are disposed is located in the cell detection portion. The battery cell supplied to a first battery cell accommodating portion of the plurality of battery cell accommodating portions may be provided in the second portion, and the battery cell supplied to a second battery cell accommodating portion of the plurality of battery cell accommodating portions may be provided in the second portion while the first portion in which the battery cell is provided is located in the battery cell detection portion.

Description

Technical Field

[0001] Embodiments of the present invention relate to a battery cell detection device, a battery cell detection method and a battery cell detection system. Background Art

[0002] With the development of electronics, communications and aerospace industries, the demand for lithium secondary batteries as energy sources has increased dramatically. In particular, with the emphasis on the importance of global environmental protection policies, the electric vehicle market is growing rapidly, and research and development of lithium secondary batteries is being actively carried out both at home and abroad.

[0003] After such a secondary battery is manufactured, various forms of testing can be performed to confirm whether the secondary battery is defective. At this time, since the secondary battery needs to be supplied to a testing device for performing the test, the test execution time increases, so a new secondary battery testing device that can shorten the test execution time is needed. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] Embodiments of the present invention provide a battery cell detection device, a battery cell detection method and a battery cell detection system capable of shortening the detection time.

[0006] (II) Technical solution

[0007] The battery cell detection device according to the present invention may include: a battery cell detection part, which detects battery cells; a plurality of battery cell accommodating parts, which receive battery cells from the outside, and the plurality of battery cell accommodating parts are arranged to be separated from each other, and the battery cell detection part is located between the plurality of battery cell accommodating parts; and a workbench, including a first part and a second part for arranging battery cells supplied to the battery cell accommodating parts, the workbench reciprocates between the plurality of battery cell accommodating parts to move the battery cells supplied to the battery cell accommodating parts, and while the second part where the battery cells are arranged is located in the battery cell detection part, the battery cells supplied to the first battery cell accommodating part among the plurality of battery cell accommodating parts can be arranged in the second part, and while the first part where the battery cells are arranged is located in the battery cell detection part, the battery cells supplied to the second battery cell accommodating part among the plurality of battery cell accommodating parts can be arranged in the second part.

[0008] The battery cell detection method according to the present invention may include the following steps: supplying a first battery cell to a first battery cell accommodating portion; setting the first battery cell on a first portion of a workbench, and moving the workbench so that the first portion is located in the battery cell detection portion; detecting the first battery cell located in the battery cell detection portion; during the detection of the first battery cell, setting a second battery cell supplied to a second battery cell accommodating portion on a second portion of the workbench; moving the workbench so that the second portion is located in the battery cell detection portion; and detecting the second battery cell located in the battery cell detection portion.

[0009] According to the present invention, the battery cell detection system may include: a battery cell supply device that supplies battery cells; a battery cell detection device that receives battery cells from the battery cell supply device and performs detection, and discharges the battery cells after the detection; and a battery cell classification device that classifies the battery cells discharged from the battery cell detection device according to the detection results, and the battery cell detection device may include: a battery cell detection unit that detects battery cells; a plurality of battery cell accommodating units that receive battery cells from the battery cell supply device, and the plurality of battery cell accommodating units are arranged to be separated from each other, and the battery cell detection unit is located between the plurality of battery cell accommodating units; and a workbench including a first part and a second part for arranging battery cells supplied to the battery cell accommodating units, the workbench reciprocates between the plurality of battery cell accommodating units to move the battery cells supplied to the battery cell accommodating units, and while the second part for arranging battery cells is located in the battery cell detection unit, the battery cells supplied to the first battery cell accommodating unit among the plurality of battery cell accommodating units can be arranged in the second part, and while the first part for arranging battery cells is located in the battery cell detection unit, the battery cells supplied to the second battery cell accommodating unit among the plurality of battery cell accommodating units can be arranged in the second part.

[0010] (III) Beneficial effects

[0011] According to the present technology, a battery cell detection device, a battery cell detection method and a battery cell detection system capable of shortening the detection time can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a diagram for explaining a battery cell detection device according to an embodiment of the present invention.

[0013] Figure 2 FIG. 1 is a diagram for explaining a battery cell detection system according to an embodiment of the present invention.

[0014] Figure 3a to Figure 3d FIG. 1 is a diagram for explaining a cell detection process by a cell detection system according to an embodiment of the present invention.

[0015] Figure 4 It is a diagram for explaining a cell detection unit in a cell detection device according to an embodiment of the present invention.

[0016] Figure 5 It is used to illustrate Figure 4 A diagram of an example of an X-ray detection unit within a cell detection unit.

[0017] Figures 6a to 6c It is used to illustrate Figure 4 A diagram of another example of an X-ray detection unit within a cell detection unit.

[0018] Figure 7 is a flow chart for illustrating a cell detection method according to an embodiment of the present invention.

[0019] Figure 8 is a flowchart for explaining in more detail a partial process of a battery cell detection method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The structural or functional descriptions of the embodiments disclosed in this specification or application are merely illustrative for the purpose of illustrating the embodiments of the technical ideas according to the present invention. The embodiments of the technical ideas according to the present invention may be implemented in various forms other than the embodiments disclosed in this specification or application, and should not be construed as limiting the technical ideas of the present invention to the embodiments described in this specification or application.

[0021] Figure 1 It is a diagram for explaining a battery cell detection device according to an embodiment of the present invention.

[0022] Reference Figure 1 The battery cell detection device 100 may include a plurality of battery cell accommodating portions 110 a and 110 b , a battery cell detection portion 120 and a stage 130 .

[0023] The plurality of battery cell accommodation portions 110 a and 110 b may be disposed to be spaced apart from each other.

[0024] In one embodiment, the plurality of battery cell receiving portions may include a first battery cell receiving portion 110 a and a second battery cell receiving portion 110 b .

[0025] Each of the cell accommodating portions 110 a and 110 b may include a cell supply region 111 at one side thereof, to which the battery cells 10 are supplied from the outside.

[0026] Each of the cell housing portions 110 a and 110 b may include a cell discharge region 112 on the other side thereof, and the cell 10 may be discharged to the outside from the cell discharge region 112 .

[0027] The cell supply region 111 and the cell discharge region 112 may be located at different sides of the cell receiving portion. In one embodiment, the cell supply region 111 and the cell discharge region 112 may be located at opposite sides of the cell receiving portion.

[0028] In one embodiment, each of the cell receiving portions 110 a and 110 b may include a cell sensing sensor so as to detect whether the battery cell 10 is supplied into each of the cell receiving portions 110 a and 110 b .

[0029] The cell detection portion 120 may be located between the plurality of cell accommodating portions 110 a and 110 b .

[0030] In one embodiment, the cell detection portion 120 may be located between the first cell receiving portion 110 a and the second cell receiving portion 110 b .

[0031] In one embodiment, the battery cell inspection unit 120 can perform live inspection for measuring live resistance, short circuit inspection for detecting short circuit, appearance inspection for detecting appearance, X-ray inspection for detection by using X-ray imaging, etc., but is not limited to specific inspections and can perform various forms of inspections used in the battery manufacturing process.

[0032] In one embodiment, the battery cell detection unit 120 can perform X-ray detection, and therefore, the battery cell detection unit 120 may include an X-ray detection device. The X-ray detection device may include an X-ray output unit and an X-ray detection unit. The battery cell detection unit 120 may obtain an X-ray image of the battery cell 10 through the X-ray detection device, and perform detection of the battery cell 10 based on the X-ray image. The battery cell detection unit 120 may perform detection by photographing the battery cell 10 disposed inside multiple times through the X-ray detection device.

[0033] The battery cell detection unit 120 may include a shielding portion 140a. The shielding portion 140a may be formed in a manner surrounding the outer periphery of the battery cell detection unit 120. The shielding portion 140a may include various shielding materials that can prevent X-rays from radiating to the outside, for example, it may include lead, tungsten, bismuth, barium sulfate, boron, etc. The shielding portion 140a does not have to cover the entire battery cell detection device 100, as long as it covers the battery cell detection unit 120, which can minimize the shielding portion installation area. As needed, an additional shielding portion 140b may be further formed on a portion of the exterior of the battery cell detection device 100.

[0034] The workbench 130 may reciprocate between the plurality of cell accommodating portions 110a and 110b. When reciprocating between the plurality of cell accommodating portions 110a and 110b, the workbench 130 may pass through the cell detection portion 120 located between the plurality of cell accommodating portions 110a and 110b.

[0035] The battery cells 10 supplied to the plurality of battery cell receiving portions 110a and 110b may be disposed on the workbench 130. In one embodiment, the workbench 130 may include a first portion 131 and a second portion 132 where the battery cells 10 are disposed. For example, the first portion 131 may be a portion where the battery cells 10 supplied to the first battery cell receiving portion 110a are disposed, and the second portion 132 may be a portion where the battery cells 10 supplied to the second battery cell receiving portion 110b are disposed.

[0036] In one embodiment, when the first portion 131 is located in the first battery cell accommodating portion 110a, the portion of the workbench 130 located in the battery cell detection portion 120 may be the second portion 132, and when the second portion 132 is located in the second battery cell accommodating portion 110b, the portion of the workbench 130 located in the battery cell detection portion 120 may be the first portion 131.

[0037] In one embodiment, while the first portion 131 in which the battery cells 10 are disposed is located in the battery cell detection portion 120, the battery cells supplied to the second battery cell receiving portion 110b may be disposed in the second portion 132. In addition, while the second portion 132 in which the battery cells 10 are disposed is located in the battery cell detection portion 120, the battery cells supplied to the first battery cell receiving portion 110a may be disposed in the first portion 131. That is, while the battery cell detection portion 120 performs detection on the battery cells 10, the battery cells 10 may be supplied and disposed in a portion of the workbench located in the battery cell receiving portions 110a, 110b.

[0038] Before new battery cells 10 are supplied to a portion of the workbench located in the battery cell accommodating portions 110a, 110b, the battery cells 10 that have been inspected may be discharged to the outside from the battery cell accommodating portions 110a, 110b. More specifically, the battery cells 10 may be discharged to the outside through the battery cell discharge area 112 of the battery cell accommodating portions 110a, 110b. In one embodiment, while the first portion 131 where the battery cells are disposed is located in the battery cell inspection portion 120, the battery cells 10 that are located in the second portion 132 and moved from the battery cell inspection portion 120 may be discharged. In addition, while the second portion 132 where the battery cells are disposed is located in the battery cell inspection portion 120, the battery cells 10 that are located in the first portion 131 and moved from the battery cell inspection portion 120 may be discharged.

[0039] In one embodiment, a plurality of cell accommodating portions, such as the first cell accommodating portion 110 a, the second cell accommodating portion 110 b, and the cell detection portion 120 may be located in a straight line. Therefore, the workbench 130 may reciprocate between the first cell accommodating portion 110 a and the second cell accommodating portion 110 b, and the workbench 130 may pass through the cell detection portion 120 .

[0040] Figure 2FIG. 1 is a diagram for explaining a battery cell detection system according to an embodiment of the present invention.

[0041] Reference Figure 1 and Figure 2 The battery cell detection system 1000 may include a battery cell detection device 100 , a battery cell supply device 200 and a battery cell classification device 300 .

[0042] The battery cell inspection device 100 may receive the battery cells 10 from the battery cell supply device 200 and perform inspection. The battery cell inspection device 100 may discharge the inspected battery cells 10 to the battery cell sorting device 300 .

[0043] In one embodiment, the battery cell detection device may be Figure 1 The battery cell detection device 100 described in the embodiment.

[0044] The battery cell supply device 200 may supply the battery cells 10 to the battery cell detection device 100. More specifically, the battery cells 10 may be supplied to the battery cell receiving parts 110a, 110b of the battery cell detection device 100.

[0045] The battery cell sorting device 300 can sort the battery cells 10 discharged from the battery cell detection device 100 according to the detection results. In one embodiment, the battery cell sorting device 300 may include a defective product discharge unit and a good product discharge unit. According to the detection results performed by the battery cell detection device 100, the battery cells 10 determined to be defective products can be transported to the defective product discharge unit, and the battery cells 10 determined to be good products can be transported to the good product discharge unit.

[0046] Figure 3a to Figure 3d FIG. 1 is a diagram for explaining a cell detection process by a cell detection system according to an embodiment of the present invention.

[0047] Reference Figure 1 , Figure 2 and Figure 3a , the first battery cell 10a may be prepared in the battery cell supply device 200 to be supplied to the battery cell detection device 100. The battery cell supply device 200 may be prepared to supply the first battery cell 10a to the first battery cell receiving portion 110a in the battery cell detection device 100.

[0048] Reference Figure 1 , Figure 2 and Figure 3b, the first battery cell 10a may be supplied to the first battery cell receiving portion 110a in the battery cell detection device 100, so that the first battery cell 10a may be set on the first portion 131 of the workbench 130 located in the first battery cell receiving portion. On the other hand, the second battery cell 10b may be prepared to be supplied to the battery cell detection device 100 in the battery cell supply device 200. The battery cell supply device 200 may prepare to supply the second battery cell 10b to the second battery cell receiving portion 110b in the battery cell detection device 100.

[0049] Reference Figure 1 , Figure 2 and Figure 3c , the workbench 130 can be moved toward the second battery cell accommodating portion 110b, so that the first portion 131 of the workbench 130 can be located in the battery cell detection portion 120, and the second portion 132 can be located in the second battery cell accommodating portion 110b. The first battery cell 10a disposed on the first portion 131 can be detected in the battery cell detection portion 120. At the same time, the second battery cell 10b can be supplied to the second battery cell accommodating portion 110b in the battery cell detection device 100, so that the second battery cell 10b can be disposed on the second portion 132 of the workbench 130 located in the second battery cell accommodating portion. On the other hand, the third battery cell 10c can be prepared to be supplied to the battery cell detection device 100 in the battery cell supply device 200. The battery cell supply device 200 can prepare to supply the third battery cell 10c to the first battery cell accommodating portion 110a in the battery cell detection device 100.

[0050] Reference Figure 1 , Figure 2 and Figure 3d , the workbench 130 can be moved toward the first battery cell accommodating portion 110a, so that the second portion 132 of the workbench 130 can be located in the battery cell detection portion 120, and the first portion 131 can be located in the first battery cell accommodating portion 110a. The second battery cell 10b disposed in the second portion 132 can be detected in the battery cell detection portion 120. At the same time, the first battery cell 10a that has been detected can be discharged from the first battery cell accommodating portion 110a to the battery cell classification device 300 side through the battery cell discharge area 112. In addition, after the discharge of the first battery cell 10a is completed, the third battery cell 10c can be supplied to the first battery cell accommodating portion 110a in the battery cell detection device 100, so that the third battery cell 10c can be set on the first portion 131 of the workbench 130 located in the second battery cell accommodating portion. On the other hand, the fourth battery cell 10d can be prepared to be supplied to the battery cell detection device 100 in the battery cell supply device 200. The cell supply device 200 may prepare to supply the fourth cell 10 d to the second cell receiving portion 110 b in the cell detection device 100 .

[0051] By repetition Figure 3a to Figure 3dIn the process described in the above, the workbench 130 may reciprocate between the first cell receiving portion 110 a and the second cell receiving portion 110 b to perform inspection on the supplied cell 10 .

[0052] Figure 4 It is a diagram for explaining a cell detection unit in a cell detection device according to an embodiment of the present invention.

[0053] Reference Figure 4 The battery cell detection unit 140 may include an X-ray output unit 121 and an X-ray detection unit 122 .

[0054] The X-ray output unit 121 can generate X-rays. X-rays are electromagnetic waves that have the property of penetrating objects. For example, X-rays can be electromagnetic waves with a wavelength of 0.01 to 10 nanometers.

[0055] The X-ray output unit 121 may irradiate X-rays to the battery cell 10. The battery cell 10 may be a secondary battery that can be repeatedly used by charging after being discharged. For example, the battery cell 10 may be a lithium-ion battery. The battery cell 10 may include a plurality of electrode layers and a plurality of separators between the electrode layers. The plurality of electrode layers may include at least one negative electrode layer and at least one positive electrode layer.

[0056] The X-ray output unit 121 can irradiate X-rays in a specific direction. For example, the specific direction can be a direction in which multiple electrode layers are stacked. For example, the specific direction can be a direction perpendicular to the multiple electrode layers. For example, the specific direction can be a direction that transmits all electrode layers. To this end, the X-ray output unit 121 can be located at the upper part or the lower part of the battery cell 10.

[0057] In one embodiment, the X-ray output part 121 may include an X-ray tube, a voltage generator, and a current source.

[0058] The X-ray tube may include a cathode, a cathode and a vacuum tube. The cathode and the cathode may be arranged in the vacuum tube. For example, each of the cathode and the cathode may be made of a metal such as tungsten (W), molybdenum (Mo), chromium (Cr), rhenium (Re), copper (Cu), cobalt (Co), iron (Fe), tantalum (Ta), zirconium (Zr), nickel (Ni) or an alloy thereof. The X-ray tube may be one of a closed type and an open type, wherein the closed type has a structure in which the interior of the vacuum tube is sealed in a vacuum state, and the open type has a structure in which the interior of the vacuum tube maintains a vacuum state when a separate vacuum pump is working. If the X-ray output unit 121 is an open type, the X-ray output unit 121 may further include a vacuum pump. The vacuum pump may make the interior of the vacuum tube a vacuum state.

[0059] The current source may apply a current for heating the filament of the negative electrode to generate thermal electrons at the negative electrode. The voltage generator may apply a high voltage between the negative electrode and the positive electrode to accelerate the thermal electrons. For example, the high voltage may be a voltage in the unit of kilovolts (kV). In this case, the accelerated thermal electrons may collide with the positive electrode to generate X-rays. The generated X-rays may be irradiated onto the object to be detected.

[0060] The X-ray detection unit 122 may detect X-rays of the transmission battery cell 10. To this end, the X-ray detection unit 122 may be located in the traveling direction of the X-rays of the transmission battery cell 10. In one embodiment, the X-ray detection unit 122 may obtain a grayscale value based on the intensity of the X-rays of the transmission battery cell 10. For example, the X-ray detection unit 122 may receive X-rays of the transmission battery cell 10. The X-ray detection unit 122 may obtain a grayscale value based on the intensity of the received X-rays.

[0061] The X-ray detection unit 122 may include a plurality of pixels. Each of the plurality of pixels may receive X-rays of a corresponding unit area in a unit area of ​​the transmission cell 10. After receiving the X-rays, each pixel may convert the X-rays to obtain a sensing signal.

[0062] In one embodiment, the X-ray detection unit 122 can obtain grayscale values ​​using a time delay integration (TDI) method. In this case, the X-ray detection unit 122 may include multiple line scanners. The line scanner may include multiple pixels arranged in a row direction or a column direction. In this case, the sensing signals obtained by allowing the X-rays to pass through the unit area of ​​the battery cell 10 multiple times in one direction can be accumulated. The accumulated sensing signals can be regarded as a sensing signal of the unit area. That is, an image can be formed by superimposing the sensing signals corresponding to the number of line scanners obtained, thereby obtaining a clearer image. In another embodiment, the X-ray detection unit 122 can obtain grayscale values ​​using a flat panel detection (FPD) method. In this case, the X-ray detection unit 122 may include multiple pixels arranged in row and column directions.

[0063] In addition, the battery cell detection unit 140 may further include a conveying unit 123. The conveying unit 123 may move the battery cell 10 in a specific direction. For example, the specific direction may be a horizontal direction. For example, the specific direction may be a direction perpendicular to the X-ray irradiation direction. For example, the horizontal direction may be a direction parallel to the direction in which the above-mentioned workbench moves. In one embodiment, the conveying unit 123 may include a conveyor belt and a conveying motor. The conveying motor may transmit a rotational force to the conveyor belt. After receiving the rotational force, the conveyor belt may move the battery cell 10 located at a specific point on the conveyor belt to another point.

[0064] In one embodiment, the conveying portion 123 may refer to at least a portion of the above-mentioned workbench. In another embodiment, the conveying portion 123 may be a component different from the above-mentioned workbench, and the conveying portion 123 may also be disposed on the workbench.

[0065] Figure 5 It is used to illustrate Figure 4 A diagram of an example of an X-ray detection unit within a cell detection unit.

[0066] Reference Figure 5 The X-ray detection unit 122 may include a plurality of line scanners 122a-1, 122a-2, and 122a-3.

[0067] Each of the plurality of line scanners 122a-1, 122a-2, and 122a-3 may include a plurality of pixels. For example, each of the line scanners 122a-1, 122a-2, and 122a-3 may include a plurality of pixels arranged in a line along the Y-axis direction. For example, each of the line scanners 122a-1, 122a-2, and 122a-3 may include pixels arranged in 1 xn. Here, n is a natural number.

[0068] The pixel 122b can detect the transmitted X-ray of the unit area of ​​the transmission battery cell 10 and obtain a sensing signal about the transmitted X-ray. For example, the sensing signal can be a charge, a current, or a voltage. The level of the sensing signal can represent the intensity of the transmitted X-ray. The pixel 122b can correspond to the unit area of ​​the battery cell 10.

[0069] In one embodiment, the level of the sensing signal may be inversely proportional to the intensity of the X-ray. For example, the lower the intensity of the X-ray, the greater the level of the sensing signal may be. In another embodiment, the level of the sensing signal may be directly proportional to the intensity of the X-ray.

[0070] In one embodiment, the pixel 122b may include a photoconductor that directly converts X-rays into electrical signals. In another embodiment, the pixel 122b may include a scintillator that converts X-rays into visible light and a photodiode that converts visible light into electrical signals.

[0071] In one embodiment, the X-ray detection unit 122 may include a pixel calculation unit. The pixel calculation unit may receive the sensing signal and obtain a grayscale value corresponding to the level of the sensing signal. For example, the pixel calculation unit may include an analog-to-digital converter that converts an analog signal into a digital signal.

[0072] In one embodiment, a plurality of line scanners 122a-1, 122a-2, 122a-3 may be arranged along the X-axis direction. The plurality of line scanners 122a-1, 122a-2, 122a-3 may include a first line scanner 122a-1, a second line scanner 122a-2, and a third line scanner 122a-3. When the battery cell 10 moves along the X-axis direction, the pixels of the first line scanner 122a-1 may transmit the acquired sensing signals to the corresponding pixels of the second line scanner 122a-2, the pixels of the second line scanner 122a-2 may transmit the acquired sensing signals to the corresponding pixels of the third line scanner 122a-3, and the pixels of the third line scanner 122a-3 may transmit the final sensing signals to the pixel calculation unit.

[0073] In one embodiment, the X-ray detection unit 122 can use multiple line scanners 122a-1, 122a-2, and 122a-3 to obtain grayscale values ​​by TDI. Therefore, the sensing signals obtained by allowing the X-rays to pass through the unit area of ​​the battery cell 10 multiple times in one direction can be accumulated. The accumulated sensing signals can be regarded as one sensing signal of the unit area. That is, an image can be formed by superimposing the sensing signals corresponding to the number of line scanners, thereby obtaining a clearer image.

[0074] Figures 6a to 6c It is used to illustrate Figure 4 A diagram of another example of an X-ray detection unit within a cell detection unit.

[0075] Reference Figure 6a and Figure 6b The X-ray detection unit 122 may include a flat panel detector (Flat Panel Detector) 122c. The flat panel detector may include a pixel array, and the pixel array includes a plurality of pixels. For example, the pixel array may include pixels arranged in mxn.

[0076] Each pixel can detect the transmitted X-ray of the unit area of ​​the transmission cell 10 and obtain a sensing signal about the transmitted X-ray. For example, the sensing signal can be a charge, a current or a voltage. The level of the sensing signal can represent the intensity of the transmitted X-ray. The pixel can correspond to the unit area of ​​the cell 10.

[0077] In one embodiment, the level of the sensing signal may be inversely proportional to the intensity of the X-ray. For example, the lower the intensity of the X-ray, the greater the level of the sensing signal may be. In another embodiment, the level of the sensing signal may be directly proportional to the intensity of the X-ray.

[0078] In one embodiment, the pixel may include a photoconductor that directly converts X-rays into electrical signals. In another embodiment, the pixel may include a scintillator that converts X-rays into visible light and a photodiode that converts visible light into electrical signals.

[0079] In one embodiment, the X-ray detection unit 122 may include a pixel calculation unit. The pixel calculation unit may receive the sensing signal and obtain a grayscale value corresponding to the level of the sensing signal. For example, the pixel calculation unit may include an analog-to-digital converter that converts an analog signal into a digital signal.

[0080] In one embodiment, the first length L1 of the flat panel detector may be shorter than the length L of the electrode tab of the battery cell 10 in the protruding direction. cell .

[0081] Therefore, an image of the entire cell 10 can be obtained by obtaining images of the cell 10 multiple times while moving the cell 10 in one direction using the conveyor (or stage). That is, an X-ray image of the cell 10 can be obtained by combining multiple images obtained while moving the cell 10.

[0082] In another embodiment, if Figure 6c As shown, the first length L1 of the flat panel detector may be longer than the length L of the electrode tab of the battery cell 10 in the protruding direction. cell Here, the first length L1 direction may be parallel to the protruding direction of the electrode tab of the battery cell 10 .

[0083] In addition, the first length L1 of the flat panel detector may be longer than the second length L2 of the flat panel detector. Here, the second length L2 direction may be a direction perpendicular to the first length L1 direction and the stacking direction of the electrode layers in the battery cell 10 .

[0084] For example, Figure 6c As shown, the first length L1 and the second length L2 of the flat panel detector can be optimized to adapt to the shape of the battery cell 10, thereby increasing the X-ray shooting area, so that the image of the entire battery cell 10 can be obtained even without moving the battery cell 10. That is, the number of measurements and the measurement time required to obtain the X-ray image of the entire battery cell 10 can be reduced.

[0085] Figure 7 is a flow chart for illustrating a cell detection method according to an embodiment of the present invention.

[0086] Reference Figure 1 , Figure 2 and Figure 7, the cell supply device 200 may supply the first cell to the first cell receiving section 110a in the cell detection device 100 (step S100). Therefore, the first cell may be set on the first portion 131 of the workbench 130, and the workbench 130 moves so that the first portion 131 may be located in the cell detection section 120 (step S200). The cell detection section 120 may detect the first cell located in the cell detection section 120, and at the same time, the cell supply device 200 may supply the second cell to the second cell receiving section 110b, so that the second cell may be set on the second portion 132 of the workbench 130 located in the second cell receiving section 110b (step S300). After the detection of the first cell is completed, the workbench 130 may move again so that the first portion 131 of the workbench 130 is located in the first cell receiving section 110a, and the second portion 132 is located in the cell detection section 120 (step S400). The battery cell detection unit 120 can detect the second battery cell located in the battery cell detection unit 120, and at the same time, the battery cell supply device 200 can supply the third battery cell to the first battery cell accommodating unit 110a, so that the third battery cell can be set on the first part 131 of the workbench 130 located in the first battery cell accommodating unit 110a (step S500).

[0087] Figure 8 is a flowchart for explaining in more detail a partial process of a battery cell detection method according to an embodiment of the present invention.

[0088] Reference Figure 7 and Figure 8 , Figure 8 It can be described in more detail Figure 7 Flowchart of steps S400 and S500. First, in step S400, the workbench 130 moves so that the first part 131 of the workbench 130 can be located in the first battery cell accommodating section 110a, and the second part 132 can be located in the battery cell detection section 120. The first battery cell that has been inspected can be located on the first part 131 of the workbench 130, and the second battery cell that is about to be inspected can be located on the second part 132. The first battery cell that has been inspected can be discharged from the first battery cell accommodating section 110a to the battery cell sorting device 300 side (step S510). Thereafter, the battery cell supply device 200 can supply the third battery cell to the first battery cell accommodating section 110a, so that the third battery cell can be set on the first part 131 of the workbench 130 located in the first battery cell accommodating section 110a (step S520). During the execution of step S510 and step S520 , the cell inspection unit 120 may inspect the second cell disposed on the second portion 132 of the workbench 130 in the cell inspection unit 120 (step S530 ).

Claims

1. A battery cell detection device, comprising: Battery cell testing department, testing battery cells; A plurality of battery cell accommodating parts, receiving battery cells from the outside, wherein the plurality of battery cell accommodating parts are arranged to be separated from each other, and the battery cell detection part is located between the plurality of battery cell accommodating parts; as well as a workbench including a first portion and a second portion for arranging cells supplied to the cell accommodating portions, wherein the workbench reciprocates between the plurality of cell accommodating portions to move the cells supplied to the cell accommodating portions, While the second portion in which the battery cells are arranged is located in the battery cell detection portion, the battery cells supplied to the first battery cell receiving portion among the plurality of battery cell receiving portions are arranged in the second portion, While the first portion in which the battery cells are disposed is located in the battery cell detection portion, the battery cells supplied to a second battery cell receiving portion among the plurality of battery cell receiving portions are disposed in the second portion.

2. The battery cell detection device according to claim 1, wherein: Each of the battery cell accommodating portions includes a battery cell supply region on one side, and batteries are supplied to the battery cell supply region from the outside.

3. The battery cell detection device according to claim 2, wherein: Each of the battery cell accommodating portions includes a battery cell discharge area on the other side where the battery cell supply area is not provided, and the battery cells are discharged to the outside from the battery cell discharge area.

4. The battery cell detection device according to claim 3, wherein: While the second portion where the battery cells are arranged is located in the battery cell detection portion, the battery cells located in the first portion and moved from the battery cell detection portion are discharged to the battery cell discharge area of ​​the first battery cell accommodation portion, While the first portion where the cells are arranged is located in the cell detection portion, the cells located in the second portion and moved from the cell detection portion are discharged to the cell discharge region of the second cell accommodation portion.

5. The battery cell detection device according to claim 3, wherein: The cell supply region and the cell discharge region are located on opposite sides of each of the cell accommodating portions.

6. The battery cell detection device according to claim 1, wherein: The first battery cell accommodating portion, the second battery cell accommodating portion, and the battery cell detecting portion are located on a straight line.

7. The battery cell detection device according to claim 6, wherein: The workbench reciprocates in a linear direction between the first battery cell accommodating portion and the second battery cell accommodating portion.

8. The battery cell detection device according to claim 1, wherein: The battery cell detection unit includes an X-ray detection device.

9. The battery cell detection device according to claim 8, wherein: The X-ray detection device includes an X-ray output unit and an X-ray detection unit.

10. The battery cell detection device according to claim 9, wherein: The X-ray detection unit includes one or more line scanners, wherein a plurality of pixels are arranged in a line form.

11. The battery cell detection device according to claim 9, wherein: The X-ray detection section includes a flat panel detector including a plurality of pixels that respectively detect X-rays.

12. The battery cell detection device according to claim 11, wherein: In the X-ray detection unit, a first length of the flat panel detector in a first direction is longer than a length of the battery cell in the first direction, and the first direction is a direction in which an electrode tab protrudes from the battery cell.

13. The battery cell detection device according to claim 12, wherein: A second length of the flat panel detector in a second direction is shorter than the first length of the flat panel detector, and the second direction is a direction perpendicular to the first direction and the stacking direction of the electrode layers in the battery cell.

14. The battery cell detection device according to claim 8, wherein: The cell detection unit includes a shielding unit for preventing X-rays from being radiated to the outside.

15. The battery cell detection device according to claim 14, wherein: The shielding portion is formed so as to surround an outer peripheral portion of the cell detecting portion.

16. A method for detecting a battery cell, comprising the following steps: supplying a first battery cell to a first battery cell receiving portion; The first battery cell is arranged on a first part of a workbench, and the workbench is moved so that the first part is located at a battery cell detection part; Detecting the first battery cell located in the battery cell detection unit; During the testing of the first battery cell, placing the second battery cell supplied to the second battery cell receiving portion on the second portion of the workbench; The workbench moves so that the second portion is located at the battery cell detection portion; as well as The second battery cell located in the battery cell detection unit is detected.

17. The battery cell detection method according to claim 16 further comprises the following steps: During the inspection of the second battery cell, the third battery cell supplied to the first battery cell accommodation portion is disposed on the first portion.

18. The battery cell detection method according to claim 17, wherein: The step of disposing the third battery cell on the first portion comprises the following steps: The first battery cell disposed on the first portion is discharged to the outside of the first battery cell housing portion.

19. A battery cell detection system, comprising: A battery cell supply device for supplying battery cells; A battery cell detection device receives the battery cells from the battery cell supply device, performs detection, and discharges the detected battery cells; as well as A cell sorting device is used to sort the cells discharged from the cell detection device according to the detection results. The battery cell detection device comprises: Battery cell testing department, testing battery cells; a plurality of cell accommodating parts, receiving the cells from the cell supply device, wherein the plurality of cell accommodating parts are spaced apart from each other, and the cell detection part is located between the plurality of cell accommodating parts; and a workbench including a first portion and a second portion for arranging cells supplied to the cell accommodating portions, wherein the workbench reciprocates between the plurality of cell accommodating portions to move the cells supplied to the cell accommodating portions, While the second portion in which the battery cells are arranged is located in the battery cell detection portion, the battery cells supplied to the first battery cell receiving portion among the plurality of battery cell receiving portions are arranged in the second portion, While the first portion in which the battery cells are disposed is located in the battery cell detection portion, the battery cells supplied to a second battery cell receiving portion among the plurality of battery cell receiving portions are disposed in the second portion.

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