A device for detecting the diagonal alignment of wound bare battery cells

Abstract

The present invention discloses a device for detecting the alignment of the diagonals of wound bare battery cells, comprising a first transport device, a second transport device, a detection device, and a defective battery cell conveyor line. The battery cells are placed on a pallet, and the battery cells are placed diagonally on the pallet. The pallet is provided with a transversely arranged detection slot, and two diagonal ends of the battery cells are placed in the detection slot. The detection device is provided on the second transport device, and the detection device includes a movable X-ray source and a movable industrial flat-panel detector. By arranging a transversely arranged detection slot on the pallet, wherein the detection slot and the transport device are horizontal, when the detection slot passes through the detection device, the X-ray source and the industrial flat-panel detector are relatively arranged just opposite to the detection slot, so that a single detection device can detect two diagonals of the battery cell in a single direction, thereby obtaining two data. By reducing the number of detection devices, the production cost of the entire machine is reduced, and at the same time, the detection efficiency is high and the device is smaller.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery testing, and in particular to a device for detecting the alignment of diagonal lines of wound bare cells. Background Art

[0002] Lithium battery, a battery composed of cells formed by winding is called a wound battery. Cell (the difference between a cell and a bare cell. A bare cell is called a cell when it is placed in a cup, trough or other container or part of the space of a composite container, of which the term "bare cell" is used in this application): refers to a single electrochemical cell containing positive and negative electrodes, which is not used directly. 2. Battery: refers to a cup, trough or other container or part of the space of a composite container that contains an electrolyte solution and a metal electrode to generate an electric current, and is a device that can convert chemical energy into electrical energy. The station or workstation that combines the positive electrode, negative electrode, and diaphragm paper of the battery in a winding manner is called a winding station. In addition to the winding method, there are also batteries that are combined and formed in a stacking manner.

[0003] The alignment of lithium batteries is one of the most important factors in testing the quality of lithium battery products. When a lithium battery is folded or poorly aligned, it is prone to damage (such as battery short circuit and fire) under the influence of external factors.

[0004] However, there is currently no economical and efficient offline equipment for testing the alignment of wound bare cells on the market. Existing manual testing equipment is inefficient, and the testing mechanisms typically emit radiation, posing a health risk to workers. Automated testing equipment is also expensive to produce (typically requiring two testing mechanisms to test both parts of a lithium battery, with the testing machine being the most expensive component of the entire system) and relatively bulky. Summary of the Invention

[0005] The main purpose of this invention is to propose a device for detecting the diagonal alignment of wound bare battery cells, which aims to meet market demand. The structural layout is designed with a set of light tubes to detect the two corners of the battery cell, and the semi-automatic equipment can complete the inspection of one battery cell in 6 seconds (manual loading and unloading, automatic detection, analysis and judgment, and automatic selection of defective products).

[0006] To achieve the above-mentioned object, the present invention proposes a device for detecting the diagonal alignment of wound bare cells, comprising:

[0007] a first transport device, the first transport device being used to transport a pallet, the battery cells being placed on the pallet, the battery cells being placed diagonally on the pallet, the pallet being provided with a transversely arranged inspection slot, two diagonal ends of the battery cells being placed in the inspection slot;

[0008] a second transport device, the second transport device being used to transport the pallet on which the battery cells are placed;

[0009] The first and second transport devices are provided with a first clamping device and a second clamping device at the rear end and the front end, respectively, wherein the first clamping device is used to move the pallet from the first transport device to the second transport device, and the second clamping device is used to move the pallet from the second transport device to the first transport device;

[0010] A loading position is provided in the middle of the first transport device, and a unloading position is provided at the front end of the first transport device;

[0011] a detection device, the detection device being disposed on the second transport device, the detection device comprising a movable X-ray source and a movable industrial flat panel detector, the X-ray source and the movable industrial flat panel detector being disposed opposite each other and respectively located above and below the detection tank;

[0012] A defective battery cell conveyor line, wherein the defective battery cell conveyor line is located between the detection device and the second clamping device, the defective battery cell conveyor line is used to place unqualified products, and the defective battery cell conveyor line is provided with a third clamping device, the third clamping device is used to move unqualified products to the defective battery cell conveyor line, the front and rear ends of the defective battery cell conveyor line are respectively located at the first transport device and the second transport device and can move the pallet from the second transport device to the first transport device, and the front end of the defective battery cell conveyor line is connected to the loading position.

[0013] Technical solution of the present invention:

[0014] 1. By setting up a horizontal inspection slot on the pallet, where the inspection slot and the transport device are horizontal, when the inspection slot passes through the inspection device, the X-ray source and the industrial flat-panel detector are arranged opposite to the inspection slot, so that a single inspection device can detect two diagonal corners of the battery cell in a single direction (if the battery cell is placed parallel to the conveyor line, it is necessary to add an X-ray source and an industrial detector to add a motion mechanism perpendicular to the conveyor line to meet the requirements of diagonal inspection of the battery cell. The diagonal line of the battery cell is parallel to the direction of movement of the conveyor line, which can reduce the motion mechanism and make the machine operation more stable and reliable). In this way, two data are obtained, and the production cost of the whole machine is reduced by reducing the number of inspection devices. At the same time, the inspection efficiency is higher and the equipment size is smaller. (X-rays are a kind of ionizing radiation. Long-term exposure can cause mutations in normal human cells and reduce immunity. As a controlled device, there are relatively more purchase and restrictions).

[0015] 2. The detection slot can be set according to actual requirements so that different battery cells can be used, and the X-ray source and industrial flat-panel detector are both movable. Therefore, during the actual detection process, they can be adjusted according to the thickness of the battery cells, thereby improving the applicability of the detection; that is, the replaceable tray and the price advantage can achieve an increase in the applicable range of the detection equipment (such as thickness, length, width, etc.). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of the present invention Figure 1 ;

[0017] Figure 2 A top view of the present invention;

[0018] Figure 3 A three-dimensional diagram of the present invention Figure 2 ;

[0019] Figure 4 A three-dimensional diagram of the present invention Figure 3 ;

[0020] Figure 5 Schematic diagram of the detection device Figure 1 ;

[0021] Figure 6 Schematic diagram of the detection device Figure 2 ;

[0022] Figure 7 Schematic diagram of the detection device Figure 3 ;

[0023] Figure 8 Schematic diagram of the clamping device Figure 1 ;

[0024] Figure 9 Schematic diagram of the clamping device Figure 2 ;

[0025] Figure 10 Schematic diagram of the clamping device Figure 3 ;

[0026] Figure 11 This is a schematic diagram of the defective battery cell transmission line;

[0027] Figure 12 Schematic diagram of the transport device;

[0028] Figure 13 This is a schematic diagram of the fixture;

[0029] Figure 14 Schematic diagram of the detection process.

[0030] In the figure, 11 is a first transport device, 12 is a second transport device, 13 is a tray, 131 is a testing tank, 14 is a fixture, 141 is an air avoidance tank, and 15 is a battery cell;

[0031] 21 is a first clamping device, 22 is a second clamping device;

[0032] 3 is a support frame, 31 is a horizontal roller, 32 is a lateral roller, 33 is a conveyor belt, 331 is a driving part, 332 is a driving groove, 34 is a driving roller, 35 is a driven roller, and 36 is a first rotating motor;

[0033] 41 is a positioning hole, 42 is a positioning block;

[0034] 51 is an arc chamfer, 52 is a hook groove;

[0035] 6 is a detection device, 60 is a shielding shell, 61 is an X-ray source, and 62 is an industrial flat panel detector;

[0036] 71 is a first mobile rack, 72 is a second mobile rack;

[0037] 8 is a frame, 81 is a horizontal movable frame, 82 is a vertical movable frame, 83 is a base, 84 is a bidirectional telescopic motor, 85 is a guide rail, 86 is a slider, and 87 is a clamping claw;

[0038] 9 is a defective battery cell transmission line. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] like Figures 1 to 14As shown, a device for detecting the diagonal alignment of wound bare cells comprises:

[0043] a first transport device 11 for transporting a pallet 13 on which the battery cells 15 are disposed, the battery cells 15 being placed diagonally on the pallet 13 (horizontally, as shown in the figure), the pallet 13 being provided with a transversely disposed detection slot 131, two diagonal ends of the battery cells 15 being placed in the detection slot 131;

[0044] A second transport device 12, the second transport device 12 is used to transport the tray 13 on which the battery cells 15 are placed;

[0045] A first clamping device 21 and a second clamping device 22 are respectively provided at the rear end and the front end of the first transport device 11 and the second transport device 12. The first clamping device 21 is used to move the pallet 13 from the first transport device 11 to the second transport device 12. The second clamping device 22 is used to move the pallet 13 from the second transport device 12 to the first transport device 11.

[0046] A loading position 100 is provided in the middle of the first transport device 11, and a unloading position 200 is provided at the front end of the first transport device 11;

[0047] A detection device 6 is provided on the second transport device 12 and includes a movable X-ray source 61 and a movable industrial flat panel detector 62. The X-ray source 61 and the movable industrial flat panel detector 62 are disposed opposite each other and are located above and below the detection slot 131, respectively.

[0048] The defective battery cell conveyor line 9 is located between the detection device 6 and the second clamping device 22. The defective battery cell conveyor line 9 is used to place unqualified products, and the defective battery cell conveyor line 9 is provided with a third clamping device 23. The third clamping device is used to move unqualified products to the defective battery cell conveyor line 9. The front and rear ends of the defective battery cell conveyor line 9 are respectively located at the first transport device 11 and the second transport device 12 and can move the pallet 13 from the second transport device 12 to the first transport device 11. The front end of the defective battery cell conveyor line 9 is connected to the loading position.

[0049] In the specific detection process, the battery cell 15 is placed on the tray 13 by manual loading, and then the first transport device 11 drives the tray 13 to move toward the position of the first clamping device 21, and the tray 13 is moved to the second transport device 12 through the first clamping device 21. When the tray 13 moves to the position of the detection device 6, because the opposite ends of the battery cell 15 are located on the detection slot 131, the X-ray source 61 and the movable industrial flat panel detector 62 move relative to each other, so that the X-ray passes through the image of the angle A of the battery cell 15, and then the first data is obtained through the detection algorithm, and then the tray 13 is moved to the position of the detection device 6. As the second transport device moves, the tray 13 causes the X-ray to pass through the image of the B corner of the battery cell 15, and then obtains the first data through the detection algorithm, and then determines whether the comprehensive judgment data of the first data and the second data meets the corresponding standard threshold, thereby determining whether the battery cell 15 meets the requirements; the qualified products are transported to the rear end of the second transport device 12, and the unqualified products are moved to the defective battery cell conveyor line 9 through the first clamping device 21; when the qualified products are moved to the first transport device through the second clamping device 22, the battery cell 15 can be taken out by the robot, and then the tray 13 continues to move in a cycle.

[0050] 1. By providing a transverse detection slot 131 on the tray 13, wherein the detection slot 131 is horizontal with the transport device, when the detection slot 131 passes through the detection device 6, the X-ray source 61 and the industrial flat panel detector 62 are arranged opposite to the detection slot 131, so that a single detection device 6 can simultaneously detect two diagonal corners of the battery cell 15, thereby obtaining two data. By reducing the number of detection devices 6, the production cost of the entire machine is reduced, the detection efficiency is higher, and the equipment size is smaller; (X-rays are a type of ionizing radiation. Long-term exposure can cause normal human cells to mutate and lead to a decrease in immunity. As a controlled device, they are relatively more expensive and have more purchase restrictions and are more expensive);

[0051] 2. The detection slot 131 can be configured according to actual requirements so that different battery cells 15 can be used. The X-ray source 61 and the industrial flat panel detector 62 are both movable. Therefore, during the actual detection process, they can be adjusted according to the thickness of the battery cells 15, thereby improving the applicability of the detection. That is, the tray 13 is replaceable and has a price advantage, which can increase the applicability of the detection equipment (such as thickness, length, width, etc.).

[0052] In this embodiment of the present invention, the first transport device 11 and the second transport device 12 have the same structure, comprising two spaced-apart support frames 3, horizontal rollers 31 and lateral rollers 32 disposed on the support frames 3, a conveyor belt 33 disposed between the two support frames 3, and a first drive device for driving the conveyor belt 33. The provision of the horizontal rollers 31 and lateral rollers 32 ensures smoother movement of the pallet 13, serves as a guide, effectively extends the service life of the transport device, and reduces the weight of the pallet 13 and the load on the conveyor belt 33.

[0053] The first transport device may be provided with a barcode scanner to obtain the corresponding code of the battery cell.

[0054] Specifically, the outer wall of the conveyor belt 33 is provided with spaced apart drive portions 331. The two drive portions 331 form a drive slot 332 corresponding to the length of the tray 13. The first drive device includes a driving roller 34 pivotally mounted between the two support frames 3, a driven roller 35, and a first rotary motor 36 connected to the driving roller 34. The conveyor belt 33 is disposed between the driving roller 34 and the driven roller 35. The predetermined spacing between the drive portions 331 drives the tray 13 to move, thereby limiting and guiding the tray 13. This also prevents collisions caused by the trays 13 abutting against each other, thereby preventing collisions or deformation of the battery cells 15.

[0055] More specifically, the battery cell 15 is placed in the positioning slot of the jig 14, which is placed diagonally on the tray 13. The diagonal ends of the jig 14 are provided with airtight slots 141, which are used to expose the diagonal ends of the battery cell 15. Because the battery cell 15 is placed exposed, the battery cell 15 is placed on the jig 14. Then, during testing, the jig 14 is placed on the tray 13. After the test is completed, the jig 14 can be removed.

[0056] Furthermore, the tray 13 is provided with multiple positioning holes 41 at diagonal positions, each of which is provided with a positioning block 42 for limiting the position of the two sides of the jig 14. The provision of multiple positioning holes 41 allows different positioning blocks 42 to be installed as needed to limit the position of the jig 14 to meet different requirements, while also ensuring that the diagonal positions of the battery cells 15 are aligned with the detection slots 131, thereby increasing the applicability of the tray 13.

[0057] Furthermore, the inner sidewall of the fixture 14 at the upper end of the positioning slot is provided with an arc-shaped chamfer 51, and the lower wall of the tray 13 is provided with recessed hooking slots 52 spaced apart. The detection slots 131 can be arranged in a continuous or spaced arrangement. The arc-shaped chamfer 51 facilitates placement of the battery cell 15 into the positioning slot, while the hooking slots 52 facilitate movement of the clamping device. Specifically, the positioning block 42 can also be provided as a positioning post. The shape of the detection slots 131 can be customized according to actual requirements, with a continuous arrangement enabling a larger detection range.

[0058] In an embodiment of the present invention, the detection device 6 includes a shielding shell 60 and a first movable frame 71 and a second movable frame 72 arranged on the shielding shell 60, and the X-ray source 61 and the industrial flat panel detector 62 are respectively arranged on the first movable frame 71 and the second movable frame 72; the first movable frame 71 and the second movable frame 72 have the same structure.

[0059] The first movable frame 71 includes a vertical guide rail, a vertical slider slidably mounted on the vertical guide rail, and a screw pair for driving the vertical slider, wherein the screw pair is arranged on the vertical guide rail;

[0060] The second movable frame 72 includes a telescopic motor provided on a vertical slider, and the X-ray source 61 and the industrial flat panel detector 62 are respectively provided on corresponding telescopic motors.

[0061] The setting of the first movable frame 71 can adjust the relative distance between the X-ray source 61 and the industrial flat-panel detector 62 according to the thickness of the battery cell 15, thereby improving the applicability and testing battery cells 15 of different thicknesses; the setting of the second movable frame 72 can adjust the relative horizontal position of the X-ray source 61 and the industrial flat-panel detector 62. Of course, it can also be specifically not set, and the relative position of the detection slot 131 and the X-ray irradiation can also be adjusted by the second transport device 12.

[0062] Specifically, the first clamping device 21 and the second clamping device 22 have the same structure, including a horizontal movable frame 81 provided on the frame 8, a vertical movable frame 82 provided on the horizontal movable frame 81, and a base 83 provided on the vertical movable frame 82. The upper wall of the base 83 is provided with a transversely arranged guide rail 85, and sliders 86 are respectively provided at both ends of the guide rail 85. The slider 86 has a clamping claw 87 extending downward, and a bidirectional telescopic motor 84 is provided in the middle of the two sliders 86. The bidirectional telescopic motor 84 can drive the sliders 86 to move relative to each other.

[0063] Thus, the clamping tray 13 is driven by the clamping claw 87, and the tray 13 is driven to move vertically and horizontally. The slider 86 can be driven to move by the bidirectional telescopic motor, and the clamping claw 87 can be driven to move relative to each other, thereby clamping the tray 13 or lowering the tray 13. By arranging the guide rail 85 above the base 83, it can play a better supporting role, and at the same time the clamping is more stable, reducing the load on the guide rail 85 and the slider 86. The weight of the tray 13 is generally heavier, thereby ensuring the stable movement of the battery cell 15.

[0064] Specifically, the defective cell conveyor line 9 includes two spaced-apart gantries, a first rotating shaft and a second rotating shaft provided on the gantries, and a belt provided between the first and second rotating shafts. The belts are provided in at least two positions, and the first rotating shaft is connected to the second rotating motor. Of course, other existing transmission methods can also be used, wherein the belt is used to support the jig 14, so that the third clamping device can move the jig 14.

[0065] In the embodiment of the present invention, two guide rails 85 are provided, and positioning plates are extended to both sides of the upper wall of the slider 86. The width of the positioning plates is greater than the width of the base 83, and the clamping claws 87 are arranged in a bent shape.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A device for detecting the diagonal alignment of wound bare cells, characterized in that: include: a first transport device, the first transport device being used to transport a pallet, the battery cells being placed on the pallet, the battery cells being placed diagonally on the pallet, the pallet being provided with a transversely arranged inspection slot, two diagonal ends of the battery cells being placed in the inspection slot; a second transport device, the second transport device being used to transport the pallet on which the battery cells are placed; The first and second transport devices are provided with a first clamping device and a second clamping device at the rear end and the front end, respectively, wherein the first clamping device is used to move the pallet from the first transport device to the second transport device, and the second clamping device is used to move the pallet from the second transport device to the first transport device; A loading position is provided in the middle of the first transport device, and a unloading position is provided at the front end of the first transport device; a detection device, the detection device being disposed on the second transport device, the detection device comprising a movable X-ray source and a movable industrial flat-panel detector, the X-ray source and the movable industrial flat-panel detector being disposed opposite each other and respectively located above and below the detection tank; A defective battery cell conveyor line, wherein the defective battery cell conveyor line is located between the detection device and the second clamping device, the defective battery cell conveyor line is used to place defective products, and the defective battery cell conveyor line is provided with a third clamping device, the third clamping device is used to move the defective products to the defective battery cell conveyor line, the front end and the rear end of the defective battery cell conveyor line are respectively located at the first transport device and the second transport device and can move the pallet from the second transport device to the first transport device, and the front end of the defective battery cell conveyor line is connected to the loading position; The battery cell is placed on the positioning groove of the jig, and the jig is placed diagonally on the tray. The diagonal end of the jig is provided with an air-avoidance groove, and the air-avoidance groove is used to expose the diagonal end of the battery cell; The tray is provided with a plurality of positioning holes at the diagonal positions, and the positioning holes are provided with positioning blocks, and the positioning blocks are used to limit the two sides of the fixture; The inner side wall of the jig at the upper end of the positioning groove is provided with an arc chamfer, and the lower wall of the tray is provided with hooking grooves at intervals; the detection groove is provided through.

2. The device for detecting the diagonal alignment of wound bare cells according to claim 1, characterized in that: The first transport device and the second transport device have the same structure, including two support frames arranged at intervals, horizontal rollers and lateral rollers arranged on the support frames, a transport belt arranged between the two support frames, and a first driving device for driving the transport belt to move.

3. The device for detecting the diagonal alignment of wound bare cells according to claim 2, characterized in that: The outer wall of the conveyor belt is provided with drive parts arranged at intervals, and the two drive parts form a drive groove suitable for the length of the pallet. The first driving device includes a driving roller pivotally mounted between two supporting frames, a driven roller and a first rotating motor connected to the driving roller, and the conveyor belt is arranged between the driving roller and the driven roller.

4. The device for detecting the diagonal alignment of wound bare cells according to claim 1, wherein: The first clamping device and the second clamping device have the same structure, including a horizontal movable frame arranged on the frame, a vertical movable frame arranged on the horizontal movable frame, and a base arranged on the vertical movable frame. The upper wall of the base is provided with a transversely arranged guide rail, and sliders are provided at both ends of the guide rails. The sliders have clamping claws extending downward, and a bidirectional telescopic motor is provided in the middle of the two sliders. The bidirectional telescopic motor can drive the sliders to move relative to each other.

5. The device for detecting the diagonal alignment of wound bare cells according to claim 1, wherein: The defective battery cell conveyor line includes two spaced-apart gantries, a first rotating shaft and a second rotating shaft provided on the gantries, and a belt provided between the first rotating shaft and the second rotating shaft. There are at least two belts, and the first rotating shaft is connected to the second rotating motor.

6. The device for detecting the diagonal alignment of wound bare cells according to claim 4, characterized in that: There are two guide rails, and positioning plates are extended to both sides of the upper wall of the sliding block. The width of the positioning plates is greater than the width of the base, and the clamping claws are arranged in a bent shape.

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