On-line defect detection device for pole piece coating of new energy battery

Abstract

The invention discloses a pole piece coating online defect detection device for a new energy battery, and relates to the field of defect detection. The precision problem is solved. The device specifically comprises a box body, a slidable protective door is arranged on the end face of the box body, a testing mechanism used for detection is arranged on the lower surface of the top of the box body, a bearing mechanism used for fixing is slidably arranged on the upper surface of the bottom of the box body, and the bearing mechanism is in transmission fit with the protective door through a linkage mechanism. The infrared microscope is used for emitting infrared light to carry out heat radiation on the pole piece, then the characteristic that the defective pole piece usually shows abnormal local power consumption distribution and finally causes local temperature rise is utilized, and temperature acquisition locking is carried out through the macro lens; according to the pole piece fault testing and positioning device, a plurality of macro lenses are arranged, so that the resolution of an obtained image can be changed, and the fault locking precision can be further improved.

Description

Technical Field

[0001] The present invention relates to the field of testing technology, and in particular to an online defect detection device for electrode coating of new energy batteries. Background Art

[0002] The pole piece of new energy battery is the core electrode structural component inside the battery. It is essentially a conductive metal current collector covered with an active material coating. Its main function is to provide a place for electrochemical reactions to occur, realize electron conduction and collect and transmit current during the charging and discharging process of the battery (forming a loop through external circuits and internal ion conduction). At the same time, its structure supports the active material coating. According to the different electrochemical effects, pole pieces are divided into two main types: positive pole pieces and negative pole pieces. Positive pole pieces usually use aluminum foil as the current collector, on which the positive active material (such as lithium cobalt oxide, lithium iron phosphate, ternary material lithium nickel cobalt manganese oxide or lithium nickel cobalt aluminum oxide) is coated. Negative pole pieces usually use copper foil as the current collector, on which the negative active material (mainly graphite, but also silicon-based materials or lithium titanate, etc.) is coated. In addition, in order to improve performance, there are also special types of pole piece substrates such as carbon-coated aluminum foil / copper foil with a conductive carbon layer pre-coated on the current collector.

[0003] Electrode is a major advancement in modern science and technology, but it has stagnated due to various reasons. Among them, the problem of electrode failure has always been a hot issue in the industry.

[0004] Therefore, how to quickly and accurately detect defects in electrodes is a technical problem that needs to be solved urgently.

[0005] To this end, the present invention proposes an online defect detection device for electrode coating of new energy batteries. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an online defect detection device for electrode coating of new energy batteries.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: An online defect detection device for electrode coating of new energy batteries, comprising a box, The end surface of the box body is provided with a slidable protective door, the top lower surface of the box body is provided with a testing mechanism for detection, the bottom upper surface of the box body is provided with a sliding bearing mechanism for fixing, and the bearing mechanism and the protective door are matched through a linkage mechanism; The testing mechanism includes an infrared microscope fixed to the lower surface of the top of the box body and a plurality of macro lenses that can cooperate with the infrared microscope. The plurality of macro lenses are arranged in a circular array, and the outer walls of the plurality of macro lenses are fixed with the same turntable. The inner wall of the turntable is movably fitted with a connecting shaft. The top outer wall of the connecting shaft is connected to a motor through a coupling, and the motor is fixed to the top outer wall of the box body by bolts; The sizes of the plurality of macro lenses are different; A key-shaped groove is formed in the outer wall of the connecting shaft, and the turntable is fitted in the inner side of the key-shaped groove with a clearance through a key-shaped protrusion welded to its inner wall.

[0008] Preferably: The testing mechanism further includes an electromagnet I and an electromagnet II. The electromagnet I is fixed to the outer wall of the connecting shaft, the electromagnet II is fixed to the top outer wall of the turntable, and the opposite sides of the electromagnet I and the electromagnet II have the same magnetic poles. A spring I is buckled to the bottom outer wall of the turntable, and the other end of the spring I is buckled to the bottom end of the connecting shaft; The electromagnet I and the electromagnet II are connected in series to the power supply circuit of the motor.

[0009] Further: The carrying mechanism includes a telescopic rod, a guiding slide rail and a carrying plate. The carrying plate is slidably connected to the bottom of the box body through the guiding slide rail. The telescopic rod is fixed to the inner side wall of the box body by bolts, and the telescopic end of the telescopic rod is fixed to the side wall of the carrying plate by bolts.

[0010] On the basis of the foregoing solution: The linkage mechanism includes a hinge shaft, a transition rod I and a transition rod II. The hinge shaft, the transition rod I and the transition rod II are all rotatably connected to the inner wall of the box body, and the ends of the transition rod I and the transition rod II are both connected to the box body through torsion springs. A winding drum I is connected to the outer walls of the hinge shaft, the transition rod I and the transition rod II through keys. The three winding drums I are connected and cooperated through a cable I.

[0011] A better solution in the foregoing solution is: A winding drum II is connected to the outer walls of the transition rod I and the transition rod II through keys. The two winding drums II are connected and cooperated through a cable II, and one end of the cable II is fixed to the side wall of the carrying plate. A gear is in transmission cooperation with the outer wall of the hinge shaft, and a tooth groove I and a tooth groove II that can be engaged with the gear are respectively arranged on the side wall of the protective door and the side wall of the box body.

[0012] As a further solution of the present invention: A ratchet claw groove and a smooth groove are formed in the outer wall of the hinge shaft. The gear is movably sleeved on the outer wall of the hinge shaft, and a ratchet claw that can be engaged with the ratchet claw groove is arranged inside the gear. A transition ring is rotatably connected to the end face of the gear, the other end of the transition ring is fixed with a telescopic airbag, and the other end of the telescopic airbag is fixed to the inner wall of the box body.

[0013] Meanwhile, a plurality of extrusion rollers are rotatably connected to the outer wall of the hinge shaft through a rotating shaft. A flexible hose is adhesively bonded to the inner wall of the box body. The extrusion rollers are in rolling and extrusion fit with the flexible hose. The two ends of the flexible hose are respectively provided with an air outlet and an air inlet, and the air outlet and the air inlet are respectively communicated with the telescopic airbag and the atmosphere.

[0014] As a preferred embodiment of the present invention: A plurality of arc-shaped head blocks are slidably connected to the outer wall of the output shaft of the motor. The arc-shaped head blocks are connected to the inner wall of the motor through a second spring. An induction groove that can be engaged with the arc-shaped head blocks is provided on the inner wall of the box body, and a switch assembly is fixed to the inner wall of the induction groove.

[0015] Meanwhile, the switch assembly includes an insulating shell and an end plate slidably fitted to the inner wall of the insulating shell. An electrode plate A is fixed to the end face of the end plate. The other side of the electrode plate A is fitted with an electrode plate B, and the electrode plate B is fixed to the inner wall of the insulating shell. The other end of the end plate is fixed with a contact rod through a bolt, and a third spring is buckled on the opposite side of the end plate and the insulating shell. An electrode plate B is adhesively bonded to the bottom of the protective door, and an electrode plate B is adhesively bonded to the outer wall of the box body that cooperates with the bottom of the protective door. The electrode plate A, the electrode plate B, the electrode plate A, and the electrode plate B are connected in series to the power supply circuit of the infrared microscope.

[0016] As a more optimal solution of the present invention: An induction coil is further connected in series to the power supply circuit of the infrared microscope. The inner wall of the induction coil is wound and fitted with an iron core. The other side of the iron core is wound and fitted with an induction coil. The induction coil is electrically connected to an electromagnetic switch, and the electromagnetic switch is connected in series to the power supply circuits of the electromagnet, the electromagnet, and the motor.

[0017] The beneficial effects of the present invention are as follows: 1. In the present invention, by using the infrared microscope to emit infrared light for thermal radiation on the pole piece, and then using the characteristic that the pole piece with defects usually exhibits abnormal local power consumption distribution, which will ultimately lead to an increase in local temperature, the temperature is obtained and locked through the macro lens, so that the fault of the pole piece can be quickly and accurately tested and located. And by setting a plurality of macro lenses in this device, the image resolution can be changed, thereby further increasing the accuracy of fault locking.

[0018] 2. In the present invention, by setting the turntable and the connecting shaft as a drivable movable connection, it can be ensured that the macro lens and the infrared microscope do not contact during switching, preventing wear caused by contact or damage to the infrared microscope due to force. At the same time, it can also ensure the reliable cooperation between the macro lens and the infrared microscope in the test state. And by using the position control of the electromagnet, the electromagnet, and the electromagnet on the turntable, and then using the circuit connection between the electromagnet, the electromagnet, and the motor, the entire control process can be fully automated.

[0019] 3. In the present invention, by providing a linkage mechanism, on the one hand, through the use of the first winch rope and the first reel, and the first transition rod and the second winch rope, the linkage integration of the movement of the protective door and the bearing plate is achieved, increasing the synchronization of the device while reducing the power arrangement. Additionally, by setting the hinge shaft and the gear to be axially slidable connections, and simultaneously cooperating with the engagement and switching states of the hinge shaft with the first tooth groove a and the second tooth groove b, and the pawl with the pawl groove, the movement states of the protective door and the bearing plate are made non-fully synchronous, thereby increasing the reliability of the device.

[0020] 4. In the present invention, by providing the extrusion roller and the hose, the "pumping" effect is achieved through the cooperation of the extrusion roller and the hose, thereby controlling the air pressure in the telescopic airbag. On this basis, based on the synchronization of the movement of the bearing plate and the rotation of the hinge shaft, the air intake and exhaust in the telescopic airbag can be made to match the movement direction of the bearing plate, thereby realizing the automatic control in the entire switching process.

[0021] 5. In the present invention, by using the first electrode plate A and the first electrode plate B to sense the switching position of the macro lens, and the second electrode plate A and the second electrode plate B to sense the closed position of the protective door, the infrared microscope can be started only when the protective door is completely closed and the macro lens is in place in cooperation with the infrared microscope, increasing both safety and accuracy. Additionally, on this basis, by providing the electromagnetic switch, the first induction coil, the iron core, and the second induction coil, and using the characteristic that the second induction coil generates current when the infrared microscope is started, the disconnection of the motor is controlled by the electromagnetic switch, thereby preventing image defects caused by the accidental start of the motor during the test and further increasing the accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of an on-line defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 2 is a schematic diagram of the test mechanism structure of an on-line defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 3 is a schematic cross-sectional view of the test mechanism of an on-line defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 4 is a schematic longitudinal-sectional view of the test mechanism of an on-line defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 5 is a schematic diagram of the installation structure of the switch assembly of an on-line defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 6 is a schematic diagram of the bearing mechanism structure of an on-line defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 7 Schematic structural diagram of the linkage mechanism of an online defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 8 Schematic structural diagram of the first tooth groove and the second tooth groove of an online defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 9 Schematic exploded view of the hinge shaft and the gear of an online defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 10 Schematic structural diagram of the extrusion roller and the hose of an online defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 11 Schematic sectional view of the switch assembly of an online defect detection device for pole piece coating of new energy batteries proposed by the present invention; Figure 12 Schematic circuit diagram of an online defect detection device for pole piece coating of new energy batteries proposed by the present invention.

[0023] In the figure: 1, box body; 2, testing mechanism; 3, protective door; 4, carrying mechanism; 5, linkage mechanism; 6, motor; 7, connecting shaft; 8, turntable; 9, macro lens; 10, infrared microscope; 11, key-shaped protrusion; 12, key-shaped groove; 13, electromagnet one; 14, electromagnet two; 15, spring one; 16, arc head chuck; 17, switch assembly; 18, spring two; 19, telescopic rod; 20, guiding slide rail; 21, carrying plate; 22, hinge shaft; 23, gear; 24, cable one; 25, reel one; 26, reel two; 27a, first tooth groove; 27b, second tooth groove; 28, transition rod one; 29, cable two; 30, transition rod two; 31, rotating shaft; 32, extrusion roller; 33, hose; 34, air outlet; 35, air inlet; 36, insulating shell; 37, spring three; 38, end plate; 39, electrode plate one A; 40, electrode plate one B; 41, contact rod; 42, electrode plate two A; 43, electrode plate two B; 44, electromagnetic switch; 45, induction coil one; 46, iron core; 47, induction coil two; 48, ratchet groove; 49, light groove; 50, ratchet; 51, transition ring; 52, telescopic airbag. Detailed implementation manners

[0024] The technical solutions of the present invention will be further described in detail below in conjunction with the specific implementation manners.

[0025] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0026] Embodiment 1: An in-line defect detection device for pole piece coating of new energy batteries, as Figures 1-12 shown, includes a box body 1. A slidable protective door 3 is provided on the end face of the box body 1. A testing mechanism 2 for detection is provided on the lower surface of the top of the box body 1. A carrying mechanism 4 for fixation slides on the upper surface of the bottom of the box body 1, and the carrying mechanism 4 and the protective door 3 are in transmission cooperation through a linkage mechanism 5.

[0027] The testing mechanism 2 includes an infrared microscope 10 fixed to the lower surface of the top of the box body 1 and a plurality of macro lenses 9 that can cooperate with the infrared microscope 10. The plurality of macro lenses 9 are arranged in a circular array, and the outer walls of the plurality of macro lenses 9 are fixed with the same turntable 8. The inner wall of the turntable 8 is movably fitted with a connecting shaft 7. The top outer wall of the connecting shaft 7 is connected by a coupling to a motor 6, and the motor 6 is fixed to the outer wall of the top of the box body 1 by bolts.

[0028] The sizes of the plurality of macro lenses 9 are different. Preferably in this embodiment: the sizes of the plurality of macro lenses 9 are 1μm, 5μm, and 20μm respectively.

[0029] A key-shaped groove 12 is provided on the outer wall of the connecting shaft 7, and the turntable 8 is in clearance fit with the inside of the key-shaped groove 12 through a key-shaped protrusion 11 welded to its inner wall.

[0030] When this device is in use, the pole piece to be tested can be carried on the top of the carrying mechanism 4. Subsequently, the carrying mechanism 4 slides from the outside of the box body 1 to the inside of the box body 1. At the same time, the carrying mechanism 4 drives the protective door 3 to close through the linkage mechanism 5. Subsequently, the infrared microscope 10 can emit infrared light to the workpiece. The workpiece is heated up by the infrared light radiation. The pole piece with defects usually shows abnormal local power consumption distribution, which will ultimately lead to an increase in local temperature. Thus, the infrared microscope 10 performs infrared induction through the macro lens 9 to lock the area with abnormal temperature, thereby realizing the fault detection function.

[0031] In this device, by using the infrared microscope 10 to emit infrared light to perform thermal radiation on the pole piece, and then utilizing the characteristic that the pole piece with defects usually shows abnormal local power consumption distribution, which will ultimately lead to an increase in local temperature, the temperature is obtained and locked through the macro lens 9. Thus, the fault of the pole piece can be tested and located quickly and accurately. And by setting a plurality of macro lenses 9 in this device, the image acquisition resolution can be changed, thereby further increasing the accuracy of fault locking.

[0032] To solve the reliability problem; as Figure 4 shown, the testing mechanism 2 further includes an electromagnet 13 and an electromagnet 14. The electromagnet 13 is fixed to the outer wall of the connecting shaft 7, and the electromagnet 14 is fixed to the top outer wall of the turntable 8. The opposite sides of the electromagnet 13 and the electromagnet 14 have the same magnetic poles. A first spring 15 is buckled to the bottom outer wall of the turntable 8, and the other end of the first spring 15 is buckled to the bottom end of the connecting shaft 7.

[0033] The electromagnet 13 and the electromagnet 14 are connected in series in the power supply circuit of the motor 6.

[0034] When the resolution needs to be switched, the motor 6 is started. At this time, the electromagnet 13 and the electromagnet 14 are also energized. The magnetic fields of the electromagnet 13 and the electromagnet 14 are used to lower the turntable 8. At this time, the macro lens 9 is not in contact with the infrared microscope 10. The motor 6 drives the turntable 8 to rotate through the connecting shaft 7, so as to switch the macro lens 9. When the required macro lens 9 is switched, the motor 6 is powered off. At this time, the magnetic force of the electromagnet 13 and the electromagnet 14 disappears. When the turntable 8 rebounds under the elastic force of the first spring 15, the macro lens 9 is in contact with the infrared microscope 10.

[0035] In this device, by setting the turntable 8 and the connecting shaft 7 as a drivable movable connection, the macro lens 9 and the infrared microscope 10 can be made not to contact during the switching process, preventing wear caused by contact or damage to the infrared microscope 10 due to force. At the same time, it can also ensure the reliable cooperation between the macro lens 9 and the infrared microscope 10 in the test state. And by using the position control of the electromagnet 13, the electromagnet 14 and the electromagnet 13 on the turntable 8, and then using the circuit connection between the electromagnet 13, the electromagnet 14 and the motor 6, the entire control process can be fully automated.

[0036] To solve the problem of workpiece movement; as Figure 6 shown, the carrying mechanism 4 includes a telescopic rod 19, a guiding slide rail 20 and a carrying plate 21. The carrying plate 21 is slidably connected to the bottom of the box body 1 through the guiding slide rail 20. The telescopic rod 19 is fixed to the inner side wall of the box body 1 by bolts, and the telescopic end of the telescopic rod 19 is fixed to the side wall of the carrying plate 21 by bolts.

[0037] The carrying plate 21 can be used to carry and fix the workpiece. And when the telescopic rod 19 expands and contracts, it can drive the carrying plate 21 to move, so that the picking and placing of the workpiece are located outside the box body 1, increasing safety and convenience.

[0038] To solve the problem of linkage; as Figure 7 , 8As shown, the linkage mechanism 5 includes a hinge shaft 22, a first transition rod 28, and a second transition rod 30. The hinge shaft 22, the first transition rod 28, and the second transition rod 30 are all rotatably connected to the inner wall of the box body 1. The ends of the first transition rod 28 and the second transition rod 30 are both connected to the box body 1 through torsion springs. A first winding drum 25 is connected to the outer walls of the hinge shaft 22, the first transition rod 28, and the second transition rod 30 by keys. The three first winding drums 25 are connected and cooperated through a first cable 24.

[0039] A second winding drum 26 is connected to the outer walls of the first transition rod 28 and the second transition rod 30 by keys. The two second winding drums 26 are connected and cooperated through a second cable 29. One end of the second cable 29 is fixed to the side wall of the bearing plate 21. The outer wall of the hinge shaft 22 is in transmission cooperation with a gear 23. A first tooth groove 27a and a second tooth groove 27b that can mesh with the gear 23 are respectively provided on the side wall of the protective door 3 and the side wall of the box body 1.

[0040] A pawl groove 48 and a smooth groove 49 are formed on the outer wall of the hinge shaft 22. The gear 23 is movably sleeved on the outer wall of the hinge shaft 22. A pawl 50 that can engage with the pawl groove 48 is provided on the inner side of the gear 23. A transition ring 51 is rotatably connected to the end face of the gear 23. The other end of the transition ring 51 is fixed with a telescopic airbag 52. The other end of the telescopic airbag 52 is fixed to the inner wall of the box body 1.

[0041] When the supporting plate 21 moves from the inside to the outside, the supporting plate 21 will pull the rope 29, thereby rotating the drum 26, thereby rotating the transition rod 1 28 and the transition rod 2 30, and the transition rod 1 28 and the transition rod 2 30 drive the hinge shaft 22 to rotate through the cooperation of the rope 1 24 and the drum 1 25. At this time, the pawl 50 engages with the pawl groove 48, thereby rotating the gear 23, and then the engagement of the gear 23 with the tooth groove 1 27a is used to realize the rising of the protective door 3. When the protective door 3 rises to the top, the telescopic airbag 52 is inflated, and the thrust of the telescopic airbag 52 on the transition ring 51 increases. When the pressure is greater than the maximum static friction between the pawl 50 and the pawl groove 48, and the gear 23 and the tooth groove 1 27a, the gear 23 slides axially along the hinge shaft 22. At this time, the pawl 50 and the pawl groove 48 disengages, and the hinge shaft 22 and the gear 23 are rotationally connected. The gear 23 simultaneously engages with the tooth groove 1 27a and the tooth groove 2 27b, so that the protective door 3 is fixed to the box body 1. Then the carrying plate 21 continues to slide until it reaches the position for taking and releasing materials and stops. When the taking and releasing of materials is completed, the carrying plate 21 slides inward. At this time, the telescopic airbag 52 is deflated and contracted, and the thrust of the telescopic airbag 52 on the transition ring 51 gradually changes to a pulling force. Until the pulling force is greater than the maximum static friction between the pawl 50 and the pawl groove 48, and the gear 23 and the tooth groove 1 27a, the gear 23 slides axially along the hinge shaft 22. At this time, the gear 23 engages with the tooth groove 1 27a, and the pawl groove 48 engages with the pawl 50. The carrying plate 21 continues to slide inward until the carrying plate 21 and the protective door 3 reach the desired position.

[0042] This device, by setting up a linkage mechanism 5, on the one hand realizes the linkage integration of the movement of the protective door 3 and the supporting plate 21 by utilizing the rope 1 24 and the drum 1 25, the transition rod 1 28 and the rope 2 29, thereby increasing the synchronization of the device while reducing the power layout. In addition, by setting the hinge shaft 22 and the gear 23 as an axially slidable connection, and coordinating the engagement switching state of the hinge shaft 22 and the tooth groove 1 27a and the tooth groove 27b, and the pawl 50 and the pawl groove 48, the movement state of the protective door 3 and the supporting plate 21 is not completely synchronized, thereby increasing the reliability of the device.

[0043] That is, at the initial stage of the movement of the supporting plate 21 from the outside to the inside, the protective door 3 opens synchronously. When the protective door 3 is opened to the maximum, the protective door 3 stops moving. At this time, the supporting plate 21 continues to move outward, which can make the supporting plate 21 extend out of the box body 1, making it safer and more convenient to take and put materials. When the taking and putting of materials is completed, the supporting plate 21 first shrinks, and the protective door 3 will not drop until the supporting plate 21 shrinks to the inside of the box body 1, thereby preventing the two from interfering with each other in movement.

[0044] In order to solve the automation control problem; Figure 10As shown, a plurality of extrusion rollers 32 are rotatably connected to the outer wall of the hinge shaft 22 through a rotating shaft 31. A flexible hose 33 is adhesively bonded to the inner wall of the box body 1. The extrusion rollers 32 are in rolling and extrusion fit with the flexible hose 33. Two ends of the flexible hose 33 are respectively provided with an air outlet 34 and an air inlet 35. The air outlet 34 and the air inlet 35 are respectively communicated with the telescopic airbag 52 and the atmosphere.

[0045] When the bearing plate 21 moves from the inside to the outside, the hinge shaft 22 will rotate, so that the extrusion rollers 32 roll along the flexible hose 33, thereby squeezing the gas in the flexible hose 33 into the telescopic airbag 52, causing the air pressure in the telescopic airbag 52 to gradually increase. When the bearing plate 21 moves from the outside to the inside, the hinge shaft 22 rotates in the reverse direction, so that the extrusion direction of the extrusion rollers 32 on the flexible hose 33 is opposite, and then the gas in the telescopic airbag 52 is sucked out, causing the air pressure in the telescopic airbag 52 to gradually decrease.

[0046] In this device, by setting the extrusion rollers 32 and the flexible hose 33, the "pumping" effect is realized by the cooperation of the extrusion rollers 32 and the flexible hose 33, so as to control the air pressure in the telescopic airbag 52. On this basis, on the basis of the synchronous movement of the bearing plate 21 and the rotation of the hinge shaft 22, the air intake and exhaust in the telescopic airbag 52 can be made to fit the movement direction of the bearing plate 21, thus realizing the automatic control in the whole switching process.

[0047] In use, the electrode to be tested can be carried on the top of the carrying mechanism 4. Subsequently, the carrying mechanism 4 slides from the outside of the box body 1 to the inside of the box body 1. At the same time, the carrying mechanism 4 drives the protective door 3 to close through the linkage mechanism 5. Subsequently, the infrared microscope 10 can emit infrared light to the workpiece. The workpiece is heated up by the infrared light radiation. The electrode with defects usually shows abnormal local power consumption distribution, which will eventually lead to an increase in local temperature. Thus, the infrared microscope 10 performs infrared induction through the macro lens 9 to lock the area with abnormal temperature, thereby realizing the fault detection function. When the resolution needs to be switched, the motor 6 starts. At this time, the electromagnet 13 and the electromagnet 14 are also energized. The magnetic fields of the electromagnet 13 and the electromagnet 14 are used to make the turntable 8 descend. At this time, the macro lens 9 and the infrared microscope 10 are not in contact. The motor 6 drives the turntable 8 to rotate through the connecting shaft 7, thereby switching the macro lens 9. When the required macro lens 9 is switched, the motor 6 is powered off. At this time, the magnetic force of the electromagnet 13 and the electromagnet 14 disappears. When the turntable 8 rebounds under the elastic force of the spring 15, the macro lens 9 is in contact with the infrared microscope again. When the carrier plate 21 moves from the inside to the outside, the carrier plate 21 will pull the cable 29, thereby making the reel 26 rotate, and then making the transition rod 28 and the transition rod 30 rotate. The transition rod 28 and the transition rod 30 drive the hinge shaft 22 to rotate through the cooperation of the cable 24 and the reel 25. At this time, the pawl 50 engages with the pawl groove 48, thereby making the gear 23 rotate. Then, the gear 23 engages with the tooth groove 27a to lift the protective door 3. At the same time, the hinge shaft 22 will rotate, so that the extrusion roller 32 rolls along the hose 33, thereby squeezing the gas in the hose 33 into the expansion airbag 52, making the air pressure in the expansion airbag 52 gradually increase. The thrust of the expansion airbag 52 on the transition ring 51 increases. When the pressure is greater than the maximum static friction between the pawl 50 and the pawl groove 48, and between the gear 23 and the tooth groove 27a, the gear 23 slides axially along the hinge shaft 22. At this time, the pawl 50 disengages from the pawl groove 48, and the connection between the hinge shaft 22 and the gear 23 is a rotational connection. The gear 23 engages with both the tooth groove 27a and the tooth groove 27b at the same time, fixing the protective door 3 to the box body 1. Then, the carrier plate 21 continues to slide until it stops at the position for loading and unloading. After the loading and unloading are completed, the carrier plate 21 slides inward, and at the same time, the hinge shaft 22 rotates in the opposite direction, so that the extrusion direction of the extrusion roller 32 on the hose 33 is opposite, and the gas in the expansion airbag 52 is sucked out, making the air pressure in the expansion airbag 52 gradually decrease. The thrust of the expansion airbag 52 on the transition ring 51 gradually becomes a pulling force. Until the pulling force is greater than the maximum static friction between the pawl 50 and the pawl groove 48, and between the gear 23 and the tooth groove 27a, the gear 23 slides axially along the hinge shaft 22. At this time, the gear 23 engages with the tooth groove 27a, and the pawl groove 48 engages with the pawl 50. The carrier plate 21 continues to slide inward until the carrier plate 21 and the protective door 3 reach the required positions.

[0048] Embodiment 2: An on-line defect detection device for pole piece coating of new energy batteries, as Figures 1-12 shown; the following improvements are made on the basis of Embodiment 1: A plurality of arc-headed blocks 16 are slidably connected to the outer wall of the output shaft of the motor 6. The arc-headed blocks 16 are connected to the inner wall of the motor 6 through the second spring 18, and an induction groove that can be engaged with the arc-headed blocks 16 is provided on the inner wall of the box body 1, and a switch assembly 17 is fixed on the inner wall of the induction groove.

[0049] The switch assembly 17 includes an insulating shell 36 and an end plate 38 slidably fitted on the inner wall of the insulating shell 36. An electrode piece A39 is fixed to the end face of the end plate 38. The other side of the electrode piece A39 is fitted with an electrode piece B40, and the electrode piece B40 is fixed to the inner wall of the insulating shell 36. A contact rod 41 is fixed to the other end of the end plate 38 through a bolt, and a third spring 37 is buckled on the opposite side of the end plate 38 and the insulating shell 36.

[0050] An electrode piece B42 is bonded to the bottom of the protective door 3, and an electrode piece B43 is bonded to the outer wall of the box body 1 that cooperates with the bottom of the protective door 3. The electrode piece A39, the electrode piece B40, the electrode piece A42, and the electrode piece B43 are connected in series to the power supply circuit of the infrared microscope 10.

[0051] And an induction coil 47 is also connected in series to the power supply circuit of the infrared microscope 10. An iron core 46 is wound and fitted inside the induction coil 47. The other side of the iron core 46 is wound and fitted with an induction coil 45. The induction coil 45 is electrically connected to an electromagnetic switch 44, and the electromagnetic switch 44 is connected in series to the power supply circuits of the electromagnet 13, the electromagnet 14, and the motor 6.

[0052] When in use in this embodiment, when switching the macro lens 9, the output shaft of the motor 6 will rotate relatively, so that an arc-headed block 16 is pulled out from the induction groove until another arc-headed block 16 is inserted into the induction groove. The contact rod 41 moves under the extrusion of the arc-headed block 16, so that the electrode piece A39 is matched with the electrode piece B40. At the same time, when the protective door 3 is completely closed, the electrode piece A42 is matched with the electrode piece B43. At this time, the power supply circuit of the infrared microscope 10 is turned on and can be controlled to be turned on. And when the infrared microscope 10 is turned on, a current is generated in the induction coil 47, thereby generating a magnetic field. The magnetic field is transmitted to the induction coil 45 by using the iron core 46, and an induced current is generated in the induction coil 45, so that the electromagnetic switch 44 is energized and closed. At this time, the motor 6, the electromagnet 13, and the electromagnet 14 are all turned off.

[0053] In this device, by using the electrode sheet A39 and the electrode sheet B40 to sense the switching position of the macro lens 9, and by using the electrode sheet A42 and the electrode sheet B43 to sense the closing position of the protection door 3, it can be ensured that the infrared microscope 10 can only be started when the protection door 3 is completely closed and the macro lens 9 is properly coordinated with the infrared microscope 10. This not only increases the safety but also improves the precision. Additionally, on this basis, by setting the electromagnetic switch 44, the induction coil 1 45, the iron core 46, and the induction coil 2 47, and utilizing the characteristic that the induction coil 2 47 generates current when the infrared microscope 10 is started, the electromagnetic switch 44 is used to control the disconnection of the motor 6, thereby preventing image defects caused by the accidental start of the motor 6 during the test and further increasing the precision.

[0054] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered by the protection scope of the present invention.

Claims

1. An on-line defect detection device for electrode coating of new energy batteries, including a box body (1), characterized in that, A slidable protective door (3) is arranged on the end face of the box body (1), a testing mechanism (2) for detection is arranged on the lower surface of the top of the box body (1), a bearing mechanism (4) for fixing slides on the upper surface of the bottom of the box body (1), and the bearing mechanism (4) and the protective door (3) are in transmission cooperation through a linkage mechanism (5); The testing mechanism (2) includes an infrared microscope (10) fixed on the lower surface of the top of the box body (1) and a plurality of macro lenses (9) that can cooperate with the infrared microscope (10). The plurality of macro lenses (9) are arranged in a circular array, and the outer walls of the plurality of macro lenses (9) are fixed with the same turntable (8). The inner wall of the turntable (8) is movably fitted with a connecting shaft (7). The top outer wall of the connecting shaft (7) is connected by a coupling to a motor (6), and the motor (6) is fixed to the outer wall of the top of the box body (1) by bolts; The sizes of the plurality of macro lenses (9) are different; A key-shaped groove (12) is formed on the outer wall of the connecting shaft (7), and the turntable (8) is fitted in the inner side of the key-shaped groove (12) through a key-shaped protrusion (11) welded to its inner wall with a clearance.

2. The on-line defect detection device for pole piece coating of new energy battery according to claim 1, characterized in that, The testing mechanism (2) further includes an electromagnet one (13) and an electromagnet two (14). The electromagnet one (13) is fixed on the outer wall of the connecting shaft (7), the electromagnet two (14) is fixed on the top outer wall of the turntable (8), and the opposite sides of the electromagnet one (13) and the electromagnet two (14) have the same magnetic poles. A spring one (15) is buckled on the bottom outer wall of the turntable (8), and the other end of the spring one (15) is buckled on the bottom end of the connecting shaft (7); The electromagnet one (13) and the electromagnet two (14) are connected in series in the power supply circuit of the motor (6).

3. The in-line defect detection device for electrode coating of new energy batteries according to claim 1, characterized in that The bearing mechanism (4) includes a telescopic rod (19), a guide rail (20) and a bearing plate (21). The bearing plate (21) is slidably connected to the bottom of the box body (1) through the guide rail (20). The telescopic rod (19) is fixed to the inner side wall of the box body (1) by bolts, and the telescopic end of the telescopic rod (19) is fixed to the side wall of the bearing plate (21) by bolts.

4. The on-line defect detection device for pole piece coating of new energy battery according to claim 2, characterized in that, The linkage mechanism (5) includes a hinge shaft (22), a transition rod one (28) and a transition rod two (30). The hinge shaft (22), the transition rod one (28) and the transition rod two (30) are all rotatably connected to the inner wall of the box body (1), and the ends of the transition rod one (28) and the transition rod two (30) are both connected to the box body (1) through torsion springs. A reel one (25) is connected to the outer walls of the hinge shaft (22), the transition rod one (28) and the transition rod two (30) through keys. The three reels one (25) are connected and cooperated through a wire rope one (24).

5. The in-line defect detection device for electrode coating of new energy batteries according to claim 4, characterized in that A drum II (26) is key-connected to the outer walls of the first transition rod (28) and the second transition rod (30). The two drums II (26) are connected and cooperated through a second cable (29). One end of the second cable (29) is fixed to the side wall of the bearing plate (21). A gear (23) is in transmission cooperation with the outer wall of the hinge shaft (22). A first tooth groove (27a) and a second tooth groove (27b) that can mesh with the gear (23) are respectively arranged on the side wall of the protection door (3) and the side wall of the box body (1).

6. The in-line defect detection device for electrode coating of new energy batteries according to claim 5, wherein A pawl groove (48) and a smooth groove (49) are formed on the outer wall of the hinge shaft (22). The gear (23) is movably sleeved on the outer wall of the hinge shaft (22). A pawl (50) that can engage with the pawl groove (48) is arranged on the inner side of the gear (23). A transition ring (51) is rotatably connected to the end face of the gear (23). The other end of the transition ring (51) is fixed with a telescopic airbag (52). The other end of the telescopic airbag (52) is fixed to the inner wall of the box body (1).

7. An on-line defect detection device for pole piece coating of new energy batteries according to claim 6, characterized in that, A plurality of pressing rollers (32) are rotatably connected to the outer wall of the hinge shaft (22) through a rotating shaft (31). A hose (33) is adhesively bonded to the inner wall of the box body (1). The pressing rollers (32) are in rolling and pressing cooperation with the hose (33). Air outlets (34) and air inlets (35) are respectively arranged at both ends of the hose (33). The air outlets (34) and the air inlets (35) are respectively communicated with the telescopic airbag (52) and the atmosphere.

8. An on-line defect detection device for electrode coating of new energy batteries according to claim 2, characterized in that, A plurality of arc-headed blocks (16) are slidably connected to the outer wall of the output shaft of the motor (6). The arc-headed blocks (16) are connected to the inner wall of the motor (6) through a second spring (18). An induction groove that can be engaged with the arc-headed blocks (16) is formed in the inner wall of the box body (1). A switch assembly (17) is fixed to the inner wall of the induction groove.

9. The in-line defect detection device for electrode coating of new energy batteries according to claim 8, characterized in that, The switch assembly (17) includes an insulating shell (36) and an end plate (38) slidably fitted to the inner wall of the insulating shell (36). An electrode plate I A (39) is fixed to the end face of the end plate (38). The other side of the electrode plate I A (39) is cooperated with an electrode plate I B (40). The electrode plate I B (40) is fixed to the inner wall of the insulating shell (36). A contact rod (41) is fixed to the other end of the end plate (38) through a bolt. A third spring (37) is buckled on the opposite side of the end plate (38) and the insulating shell (36). An electrode plate II A (42) is adhesively bonded to the bottom of the protection door (3). An electrode plate II B (43) is adhesively bonded to the outer wall of the box body (1) that is in cooperation with the bottom of the protection door (3). The electrode plate I A (39), the electrode plate I B (40), the electrode plate II A (42), and the electrode plate II B (43) are connected in series to the power supply circuit of the infrared microscope (10).

10. The online defect detection device for pole piece coating of new energy batteries according to claim 9, characterized in that, The power supply circuit of the infrared microscope (10) is also connected in series with a second induction coil (47). The inner wall of the second induction coil (47) is wound and fitted with an iron core (46). The other side of the iron core (46) is wound and fitted with a first induction coil (45). The first induction coil (45) is electrically connected to an electromagnetic switch (44), and the electromagnetic switch (44) is connected in series to the power supply circuits of the first electromagnet (13), the second electromagnet (14), and the motor (6).

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