A lithium battery diaphragm breakdown voltage detection device

Abstract

The present invention discloses a lithium battery diaphragm breakdown voltage detection device, which relates to the field of lithium battery diaphragm detection, including a box body and a detection plate, a mounting plate is symmetrically fixed to the outer wall of one side of the box body, a lithium battery diaphragm roller is installed between the two mounting plates, the diaphragm end of the lithium battery diaphragm roller passes through the box body and extends to the interior, a vertical partition is fixed inside the box body, two first transmission rollers and two second transmission rollers are both sleeved with wiping cloths, the first transmission roller and the second transmission roller are connected by a driving assembly, a drying assembly is provided inside the box body below the driving assembly, the actuator of the drying assembly is located above the first transmission roller and below the second transmission roller, and the drying assembly is used to dry the wiping cloth. The present application can remove dust, impurities or other impurities that may exist on the surface by soaking and wiping with cleaning liquid when performing breakdown voltage detection on the lithium battery diaphragm, so as to avoid interference with the detection result and ensure the reliability of the detection result.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of lithium battery diaphragm detection, and specifically to a lithium battery diaphragm breakdown voltage detection device. Background Art

[0002] In the structure of lithium batteries, the diaphragm is one of the key internal components. The performance of the diaphragm determines the battery's interface structure, internal resistance, and other characteristics, directly affecting the battery's capacity, cycle life, and safety performance. A high-performance diaphragm plays an important role in improving the battery's overall performance. If the diaphragm's breakdown voltage is too low, it is easy to break down during the use of the lithium battery, causing a short circuit in the battery cell and posing a safety hazard. Therefore, it is necessary to perform a breakdown voltage test on the lithium battery diaphragm.

[0003] The diaphragm breakdown voltage test device described in the prior art includes: upper and lower electrode plates and a boost test circuit; the boost test circuit is electrically connected to the upper and lower electrode plates; the boost test circuit is adapted to apply a boost voltage to a diaphragm placed between the upper and lower electrode plates through the upper and lower electrode plates to cause the diaphragm to break down; and the boost test circuit is adapted to detect the breakdown voltage value of the diaphragm when it is broken down;

[0004] Although the above technology can measure the breakdown voltage of the diaphragm between the two electrode plates and detect the breakdown voltage value, it can realize the function of rapid detection of the breakdown voltage data of the tested area of ​​a roll of diaphragm, and can calculate the lowest breakdown voltage in the surface area of ​​the diaphragm. However, when testing the lithium battery diaphragm, there may be dust, grease or other impurities on the surface of the diaphragm. These substances will affect the dielectric constant of the diaphragm, resulting in inaccurate detection values. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a lithium battery diaphragm breakdown voltage detection device to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The cam is provided with a plurality of guide wheels, and the guide wheels are provided with a plurality of guide wheels, and the guide wheels are provided with a plurality of guide wheels. The guide wheels are provided with a plurality of guide wheels, and the guide wheels are provided with a plurality of guide wheels. The guide wheels are provided with a plurality of guide wheels, and the guide wheels are provided with a plurality of guide wheels. The guide wheels are provided with a plurality of guide wheels. The guide wheels are provided with a plurality of guide wheels. The guide wheels are provided with a plurality of guide wheels. The guide wheels are provided with a plurality of guide wheels. The guide wheels are provided with a plurality of guide wheels. The guide wheels are provided with a plurality of guide wheels.

[0008] The two groups of transmission rollers are respectively arranged above and below the diaphragm, and the two groups of transmission rollers are respectively composed of two first transmission rollers and two second transmission rollers, and the two first transmission rollers and the two second transmission rollers are both provided with wiping cloths, and the first transmission rollers and the second transmission rollers are connected by a driving assembly. A drying assembly is provided inside the box below the driving assembly, and the actuator of the drying assembly is located above the first transmission roller and below the second transmission roller. The drying assembly is used to dry the wiping cloth.

[0009] Specifically, the import wheel and the export wheel are on the same horizontal line, the two guide wheels are located below the import wheel and the export wheel, both ends of the import wheel and the export wheel are rotatably connected to the inner wall of the box, and both ends of the two guide wheels are movably installed with fixed plates, and the top of each fixed plate is fixedly connected to the inner top wall of the box.

[0010] Specifically, the lifting plate is provided with a push-in groove, the liquid storage tank is slidably installed in the push-in groove, the end face of the liquid storage tank is fixedly connected to the end of the lifting plate by a bolt, a limiting plate is welded on the side of the lifting plate away from the moving block, and the inner wall of the box body is provided with a limiting groove, the limiting plate is slidably installed in the limiting groove, a sliding rod is passed through the limiting plate, and both ends of the sliding rod are fixedly connected to the groove wall of the limiting groove.

[0011] Specifically, the two wiping cloths are in contact with the upper surface and the lower surface of the diaphragm respectively, and the two first transmission rollers and the two second transmission rollers are respectively fixed with shafts at both ends, and the ends of each shaft are respectively rotatably connected to the partition and the box body;

[0012] The drive assembly includes a drive motor, a first sprocket is fixed on the output end of the drive motor and the shaft of the second transmission roller, the two first sprockets are connected by a first transmission chain, a second sprocket is fixed on the other side shaft of the second transmission roller and the shaft of the first transmission roller, the two second sprockets are connected by a second transmission chain, and the drive motor is fixedly connected to the box by bolts.

[0013] The technical solution is specific, and the drying component includes two drying plates, which are respectively located on the side of the two wiping cloths away from the diaphragm, and a plurality of nozzles are provided on the side of the two drying plates close to the wiping cloths, and the side walls of the two drying plates are connected to a vertical air inlet main pipe through an air inlet branch pipe, and a heating box is provided at the bottom end of the air inlet main pipe, and an insulation plate is horizontally fixed in the heating box, and a serpentine elbow is installed above the insulation plate, and a plurality of electromagnetic heating coils are provided on the serpentine elbow, and the bottom end of the air inlet main pipe is connected to the top end of the serpentine elbow.

[0014] The technical solution is specific. The bottom wall of the heating box is installed with an air pump by bolts. The bottom end of the serpentine elbow passes through the insulation board and is connected to the output port of the air pump. The air inlet of the air pump is connected to the suction pipe. The suction pipe passes through the wall of the box and communicates with the outside. A filter is installed on the outer wall of the box at the suction pipe. Multiple groups of electromagnetic heating coils are fixedly connected to the wall of the heating box through brackets. Connecting rods are symmetrically fixed to the two side walls of the two drying plates, and the ends of each connecting rod are fixedly connected to the partition and the box respectively.

[0015] Specifically, the upper surface of the movable block is fixed with a first conductive block, a fixed block is provided above the first conductive block, the fixed block is fixedly connected to the partition, the lower surface of the fixed block is fixed with a second conductive block, and the first conductive block and the second conductive block are connected.

[0016] The technical solution is specific, the detection plate is composed of an upper plate and a lower plate, the upper plate and the lower plate are located above and below the diaphragm, and the upper plate and the lower plate are provided with metal positioning plates on the side away from the diaphragm, an electrical voltage tester is bolted to one side of the top of the box body, the two metal positioning plates are electrically connected to the electrical voltage tester through wires, and the upper plate and the lower plate are connected to the outer wall of the box body through an adjustment component.

[0017] Specifically, the two adjustment components of the present technical solution include L-shaped plates, one end face of the two L-shaped plates is fixedly connected to the outer wall of the box, the two L-shaped plates are fixed with electric slide rails close to the inner wall of the box, sliders are slidably installed on the two electric slide rails, connecting plates are fixedly installed on the two sliders, insulating blocks are fixed at the center of the side of the upper electrode plate and the lower electrode plate away from the diaphragm, and the ends of the two connecting plates are fixedly connected to the two insulating blocks respectively.

[0018] Specifically, the other end faces of the two L-shaped plates are each provided with a guide rod, the ends of the two guide rods are fixedly connected to the connecting plate, and the two guide rods are each provided with a support spring, and the two ends of the two support springs are respectively fixedly connected to the L-shaped plate and the connecting plate.

[0019] In summary, the present invention has the following beneficial effects: when performing breakdown voltage testing on a lithium battery diaphragm, the present invention can remove dust, impurities or other impurities that may exist on the surface by soaking and wiping with a cleaning solution, thereby avoiding interference with the test results and ensuring the reliability of the test results;

[0020] First, the diaphragm end on the lithium battery diaphragm roll is introduced into the box body, passes through the guide wheel group and between the first transmission roller and the second transmission roller, passes through the box body, passes between the upper plate and the lower plate, and connects to the winding roller. Then the hydraulic cylinder works, and its telescopic end pushes the lifting plate upward. The upward lifting plate drives the installed liquid storage tank to move upward until the two guide wheels are located in the liquid storage tank, and the diaphragm passing through is immersed in the cleaning liquid in the liquid storage tank. Then the winding roller connected at the end rotates to drive the diaphragm to move intermittently. At this time, the soaked part moves to the wiping cloth under the action of the guide wheel and the lead-out wheel.

[0021] When the lifting plate moves up, the first conductive block on the moving block contacts the second conductive block, so that the driving assembly and the drying assembly work. The driving motor in the driving assembly drives the second transmission roller to rotate through the transmission connection between the first sprockets, and the second transmission roller drives the first transmission roller to rotate through the transmission connection between the second sprockets. The two first transmission rollers and the second transmission rollers both drive the wiping cloth to move by friction, and the moving wiping cloth wipes the surface of the diaphragm it passes through. At this time, the air pump and the electromagnetic heating ring work. The air pump draws in external air and heats it through the electromagnetic heating ring at the serpentine bend. The heated air enters the drying plate through the air inlet main pipe and the air inlet branch pipe, and is sprayed from a number of nozzles to the moving wiping cloth, ensuring that the wiping cloth remains dry and can always wipe the diaphragm dry.

[0022] Finally, the wiped-dried diaphragm is moved between the detection plates, and the upper and lower plates are started by the electrical voltage tester. An increasing voltage is applied to the diaphragm through the two plates to test the breakdown voltage of the diaphragm. The breakdown voltage value after the test is displayed on the electrical voltage tester, and the intermittent movement of the diaphragm can realize continuous detection of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the device of the present invention;

[0024] Figure 2 It is a main cross-sectional structural diagram of the present invention;

[0025] Figure 3 This is an enlarged view of point A of the present invention;

[0026] Figure 4 It is a schematic structural diagram of the liquid storage tank of the present invention;

[0027] Figure 5 This is a schematic structural diagram of the wiping cloth of the present invention;

[0028] Figure 6 Schematic diagram of a drying plate of the present invention.

[0029] Description of the drawings: 1. Box; 101. Partition; 1011. Moving slot; 1012. Fixed block; 1013. Second conductive block; 1014. Square perforation; 102. Electrical voltage tester; 103. Mounting plate; 104. Limiting slot; 2. Lithium battery diaphragm roll; 3. Detection plate; 301. Upper plate; 302. Lower plate; 303. Metal positioning piece; 4. Adjustment assembly; 401. L-shaped plate; 402. Electric slide rail; 403. Slider; 404. Connecting plate; 405. Insulating block; 406. Guide rod; 407. Support spring; 5. Guide wheel assembly; 501. Introducing wheel; 502. Guide wheel; 5021. Fixed plate; 503. Derivative wheel; 6. Liquid storage tank; 601 , lifting plate; 6011, pushing groove; 602, hydraulic cylinder; 603, limiting plate; 6031, sliding rod; 604, moving block; 6041, first conductive block; 7, first transmission roller; 701, second transmission roller; 702, wiping cloth; 703, shaft; 8, driving assembly; 801, driving motor; 802, first sprocket; 803, first transmission chain; 804, second sprocket; 805, second transmission chain; 9, drying assembly; 901, drying plate; 9011, connecting rod; 902, air inlet branch pipe; 903, air inlet main pipe; 904, heating box; 9041, heat insulation board; 905, serpentine elbow; 9051, electromagnetic heating coil; 906, vacuum pump; 9061, suction pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0031] The following describes an embodiment of the present invention based on its overall structure. Example

[0032] After passing through the box body 1, the end of the diaphragm will be connected to the winding roller, and the winding roller will intermittently wind the diaphragm to move the diaphragm. All electrical components in this application are controlled by the controller, and the installation between the lithium battery diaphragm roller 2 and the mounting plate 103 adopts existing technology and can be rotated.

[0033] See also Figure 1-6 As shown, a lithium battery diaphragm breakdown voltage detection device includes a box body 1 and a detection plate 3. A mounting plate 103 is symmetrically fixed to the outer wall of one side of the box body 1. A lithium battery diaphragm roll 2 is installed between the two mounting plates 103. The diaphragm end of the lithium battery diaphragm roll 2 extends through the box body 1 to the interior. A vertical partition 101 is fixed inside the box body 1. The top and bottom of the partition 101 are respectively provided with a square through-hole 1014 and a movable through-slot 1011. The inside of the box body 1 is provided with a guide wheel group 5 and two sets of transmission rollers on both sides of the partition 101. The guide wheel group 5 consists of an introduction wheel 501 and two guide wheels. The guide wheel 502 and the output wheel 503 are composed of a liquid storage tank 6 with a top opening, and a lifting plate 601 is provided below the liquid storage tank 6. A moving block 604 is welded to one side wall of the lifting plate 601. The moving block 604 extends through the moving groove 1011 to the other side of the partition 101. Hydraulic cylinders 602 are symmetrically installed on the lower surface of the lifting plate 601. The two hydraulic cylinders 602 are embedded in the bottom wall of the box body 1. The two guide wheels 502 are located in the liquid storage tank 6. The diaphragm end of the lithium battery diaphragm roller 2 passes through the guide wheel group 5 and the square through-hole 1014 to pass through the other side of the box body 1.

[0034] The inlet wheel 501 and the outlet wheel 503 are on the same horizontal line, and the two guide wheels 502 are located below the inlet wheel 501 and the outlet wheel 503. Both ends of the inlet wheel 501 and the outlet wheel 503 are rotatably connected to the inner wall of the box body 1. Both ends of the two guide wheels 502 are movably installed with fixed plates 5021. The top of each fixed plate 5021 is fixedly connected to the inner top wall of the box body 1. A push-in groove 6011 is opened on the lifting plate 601, and the liquid storage tank 6 is slidably installed in the push-in groove 6011. The end face of the liquid storage tank 6 is fixedly connected to the end of the lifting plate 601 by bolts, and the lifting plate 601 is away from the moving block 6 A limiting plate 603 is welded to one side of the movable block 604. A limiting groove 104 is formed on the inner wall of the box body 1. The limiting plate 603 is slidably installed in the limiting groove 104. A sliding rod 6031 is passed through the limiting plate 603. Both ends of the sliding rod 6031 are fixedly connected to the groove wall of the limiting groove 104. A first conductive block 6041 is fixed to the upper surface of the movable block 604. A fixed block 1012 is provided above the first conductive block 6041. The fixed block 1012 is fixedly connected to the partition 101. A second conductive block 1013 is fixed to the lower surface of the fixed block 1012. The first conductive block 6041 and the second conductive block 1013 are connected.

[0035] Two groups of transmission rollers are respectively arranged above and below the diaphragm, and the two groups of transmission rollers are respectively composed of two first transmission rollers 7 and two second transmission rollers 701. The two first transmission rollers 7 and the two second transmission rollers 701 are both provided with wiping cloths 702. The first transmission rollers 7 and the second transmission rollers 701 are connected by a driving assembly 8. A drying assembly 9 is provided below the driving assembly 8 inside the box 1. The actuator of the drying assembly 9 is located above the first transmission roller 7 and below the second transmission roller 701. The drying assembly 9 is used to dry the wiping cloths 702.

[0036] When performing a lithium battery diaphragm breakdown voltage test, the diaphragm on the lithium battery diaphragm reel 2 is introduced into the box body 1, passes through the guide wheel group 5 and the two wiping cloths 702, passes through the box body 1, passes between the upper electrode plate 301 and the lower electrode plate 302, and is connected to the winding roller. Then, the hydraulic cylinder 602 is activated by the controller, and the telescopic end of the device pushes the lifting plate 601 to move upward. The upward lifting plate 601 drives the installed liquid storage tank 6 to move upward until the two guide wheels 502 are located in the liquid storage tank 6, and the passing diaphragm is immersed in the cleaning liquid (such as ethanol, acetone, etc.) in the liquid storage tank 6. The movement of the lifting plate 601 also drives the limiting plate 603 and the moving block 604 to move. The limiting plate 603 slides along the sliding rod 6031 in the limiting groove 104, and the moving block 604 moves along the moving through groove 1011 until the first conductive block 6041 contacts the second conductive block 1013, so that the driving components in the driving assembly 8 and the drying assembly 9 are working;

[0037] The driving assembly 8 causes the two first transmission rollers 7 and the two second transmission rollers 701 to drive the wiping cloths 702 to move, so that the two wiping cloths 702 dry the surface of the diaphragm they pass through, and the drying assembly 9 draws in external air and heats it, and then sprays the heated air toward the wiping cloths 702, thereby ensuring that the wiping cloths 702 remain dry and can always dry the diaphragm;

[0038] Finally, the wiped-off diaphragm is moved between the detection plates 3. The upper plate 301 and the lower plate 302 are activated by the electrical voltage tester 102. An increasing voltage is applied to the diaphragm through the two plates to test the breakdown voltage of the diaphragm. The breakdown voltage value after the test is displayed on the electrical voltage tester 102. The intermittent movement of the diaphragm can realize the continuous detection of the diaphragm.

[0039] Therefore, when performing breakdown voltage testing on lithium battery diaphragms, the present application can remove dust, impurities or other impurities that may exist on the surface by soaking and wiping with cleaning fluid, thereby avoiding interference with the test results and ensuring the reliability of the test results.

[0040] See also Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the two wiping cloths 702 are in contact with the upper surface and the lower surface of the diaphragm respectively, and the two first transmission rollers 7 and the two second transmission rollers 701 are respectively fixed with shafts 703 at both ends, and the ends of each shaft 703 are respectively rotatably connected with the partition 101 and the box body 1, and the driving assembly 8 includes a driving motor 801, and the output end of the driving motor 801 and the shaft 703 of the second transmission roller 701 are both fixed with a first sprocket 802, and the two first sprockets 802 are connected to each other through a first transmission chain 803, and the shaft 703 on the other side of the second transmission roller 701 and the shaft 703 of the first transmission roller 7 are both fixed with a second sprocket 804, and the two second sprockets 804 are connected to each other through a second transmission chain 805, and the driving motor 801 is fixed to the box body 1 by bolts;

[0041] The drying assembly 9 includes two drying plates 901, and the two drying plates 901 are respectively located on the side of the two wiping cloths 702 away from the diaphragm. The side of the two drying plates 901 close to the wiping cloth 702 is provided with a plurality of nozzles, and the side walls of the two drying plates 901 are connected to a vertical air inlet main pipe 903 through an air inlet branch pipe 902. The bottom end of the air inlet main pipe 903 is provided with a heating box 904, and a heat insulation board 9041 is fixed horizontally in the heating box 904. A serpentine elbow 905 is installed above the heat insulation board 9041. A plurality of electromagnetic heating coils 9051 are provided on the serpentine elbow 905. The bottom end of the air inlet main pipe 903 and the top end of the serpentine elbow 905 are connected. The bottom wall of the heating box 904 is fixed with an air pump 906 by bolts, the bottom end of the serpentine elbow 905 passes through the insulation board 9041 and is connected to the output port of the air pump 906, the air inlet of the air pump 906 is connected to the air intake pipe 9061, the air intake pipe 9061 passes through the wall of the box body 1 and communicates with the outside, a filter is installed on the outer wall of the box body 1 at the air intake pipe 9061, and multiple groups of electromagnetic heating coils 9051 are fixedly connected to the box wall of the heating box 904 through brackets, and connecting rods 9011 are symmetrically fixed to the two side walls of the two drying plates 901, and the ends of each connecting rod 9011 are fixedly connected to the partition 101 and the box body 1 respectively.

[0042] The driving motor 801 in the driving assembly 8 works, and the output end of the driving motor 801 drives the installed first sprocket 802 to rotate. The first sprocket 802 drives another first sprocket 802 to rotate through the first transmission chain 803, and the other first sprocket 802 drives the inserted shaft 703 to rotate. The shaft 703 drives the connected second transmission roller 701 to rotate. At this time, the other shaft 703 of the second transmission roller 701 drives the second sprocket 804 to rotate. The second sprocket 804 drives another second sprocket 804 to rotate through the second transmission chain 805. The other second sprocket 804 drives the inserted shaft 703 to rotate. The shaft 703 drives the connected first transmission roller 7 to rotate, and then the second transmission roller 701 and the first transmission roller 7 both drive the wiping cloth 702 to move through friction, and make the other first transmission roller 7 and the second transmission roller 701 also rotate, and the moving wiping cloth 702 wipes the surface of the diaphragm it passes through;

[0043] At this time, the vacuum pump 906 in the drying component 9 is working, and the external air is sucked into the serpentine bend 905 through the suction pipe 9061. At this time, the electromagnetic heating coil 9051 works to generate heat to heat the passing air. The heated air enters the two drying plates 901 through the air inlet main pipe 903 and the air inlet branch pipe 902, and is sprayed toward the wiping cloth 702 from several nozzles, so that the wiping cloth 702 is dried by the ejected hot air after wiping the diaphragm, so as to keep the diaphragm dry.

[0044] See also Figure 1-3As shown, the detection plate 3 is composed of an upper plate 301 and a lower plate 302, the upper plate 301 and the lower plate 302 are located above and below the diaphragm, and the upper plate 301 and the lower plate 302 are provided with a metal positioning piece 303 on the side away from the diaphragm, and an electrical voltage tester 102 is fixed with bolts on one side of the top of the box 1, and the two metal positioning pieces 303 are electrically connected to the electrical voltage tester 102 through wires, and the upper plate 301 and the lower plate 302 are connected to the outer wall of the box 1 through an adjustment component 4, and the two adjustment components 4 include L-shaped plates 401, and one end surface of the two L-shaped plates 401 is fixedly connected to the outer wall of the box 1, and the two L-shaped plates 401 are close to the box. 1 are fixed with electric slide rails 402, and sliders 403 are slidably installed on the two electric slide rails 402. Connecting plates 404 are fixedly installed on the two sliders 403. Insulating blocks 405 are fixed at the center of the upper electrode plate 301 and the lower electrode plate 302 away from the diaphragm. The ends of the two connecting plates 404 are respectively fixedly connected to the two insulating blocks 405. The other end surfaces of the two L-shaped plates 401 are penetrated by guide rods 406, and the ends of the two guide rods 406 are fixedly connected to the connecting plates 404. Support springs 407 are sleeved on the two guide rods 406, and the two ends of the two support springs 407 are respectively fixedly connected to the L-shaped plate 401 and the connecting plate 404.

[0045] When performing breakdown voltage detection, the distance between the upper electrode plate 301 and the lower electrode plate 302 can be adjusted according to the thickness of the diaphragm through the adjustment component 4. By starting the electric slide rails 402 on the two L-shaped plates 401, the two sliders 403 slide along the electric slide rails 402. The two sliders 403 drive the upper electrode plate 301 and the lower electrode plate 302 to move through the connecting plate 404 and the insulating block 405 respectively. At the same time, the movement of the connecting plate 404 will also drive the guide rod 406 to move, and squeeze or stretch the support spring 407, thereby realizing the adjustment of the distance between the two plates, and can make corresponding adjustments according to the thickness of the diaphragm to be detected.

[0046] The working principle of the present invention is:

[0047] When performing a lithium battery diaphragm breakdown voltage test, the diaphragm on the lithium battery diaphragm reel 2 is introduced into the box body 1, passes through the guide wheel group 5 and the two wiping cloths 702, passes through the box body 1, passes between the upper electrode plate 301 and the lower electrode plate 302, and is connected to the winding roller. Then, the hydraulic cylinder 602 is activated by the controller, and the telescopic end of the device pushes the lifting plate 601 to move upward. The upward lifting plate 601 drives the installed liquid storage tank 6 to move upward until the two guide wheels 502 are located in the liquid storage tank 6, and the passing diaphragm is immersed in the cleaning liquid (such as ethanol, acetone, etc.) in the liquid storage tank 6. The movement of the lifting plate 601 also drives the limiting plate 603 and the moving block 604 to move. The limiting plate 603 slides along the sliding rod 6031 in the limiting groove 104, and the moving block 604 moves along the moving through groove 1011 until the first conductive block 6041 contacts the second conductive block 1013, so that the driving components in the driving assembly 8 and the drying assembly 9 are working;

[0048] The drive motor 801 works, and the output end of the drive motor 801 drives the installed first sprocket 802 to rotate. The first sprocket 802 drives another first sprocket 802 to rotate through the first transmission chain 803. The other first sprocket 802 drives the inserted shaft 703 to rotate. The shaft 703 drives the connected second transmission roller 701 to rotate. At this time, the other shaft 703 of the second transmission roller 701 drives the second sprocket 804 to rotate. The second sprocket 804 drives another second sprocket 804 to rotate through the second transmission chain 805. The other second sprocket 804 drives the inserted shaft 703 to rotate. The shaft 703 drives the connected first transmission roller 7 to rotate, and then the second transmission roller 701 and the first transmission roller 7 both drive the wiping cloth 702 to move through friction, and make the other first transmission roller 7 and the second transmission roller 701 also rotate, and the moving wiping cloth 702 wipes the surface of the diaphragm it passes through;

[0049] The vacuum pump 906 in the drying component 9 works, and the external air is sucked into the serpentine bend 905 through the suction pipe 9061. At this time, the electromagnetic heating coil 9051 works to generate heat to heat the passing air. The heated air enters the two drying plates 901 through the air inlet main pipe 903 and the air inlet branch pipe 902, and is sprayed to the wiping cloth 702 from several nozzles, so that the wiping cloth 702 is dried by the ejected hot air after wiping the diaphragm. Finally, the dried diaphragm moves between the detection plates 3, and the upper plate 301 and the lower plate 302 are started by the electrical voltage tester 102. An increasing voltage is applied to the diaphragm through the two plates to test the breakdown voltage of the diaphragm. The breakdown voltage value after the test is displayed on the electrical voltage tester 102.

[0050] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A lithium battery diaphragm breakdown voltage detection device, comprising a housing (1) and a detection plate (3), characterized in that A mounting plate (103) is symmetrically fixed to the outer wall of one side of the box body (1), a lithium battery diaphragm roll (2) is installed between the two mounting plates (103), and the diaphragm end of the lithium battery diaphragm roll (2) passes through the box body (1) and extends to the interior. A vertical partition (101) is fixed inside the box body (1), and the top and bottom of the partition (101) are respectively provided with a square through hole (1014) and a movable through groove (1011). A guide wheel group (5) and two sets of transmission rollers are respectively provided on both sides of the partition (101) inside the box body (1), and the guide wheel group (5) is composed of an import wheel (501), two guide wheels (502) and an export wheel (503). A liquid storage tank (6) with a top opening is provided below the guide wheel group (5), and a lifting plate (601) is provided below the liquid storage tank (6). A moving block (604) is welded to one side wall of the lifting plate (601), and the moving block (604) extends through the moving groove (1011) to the other side of the partition (101). Hydraulic cylinders (602) are symmetrically installed on the lower surface of the lifting plate (601), and the two hydraulic cylinders (602) are embedded in the bottom wall of the box body (1). The two guide wheels (502) are located in the liquid storage tank (6), and the diaphragm end of the lithium battery diaphragm roller (2) passes through the guide wheel group (5) and the square through-hole (1014) and passes out of the other side of the box body (1); The two groups of transmission rollers are respectively arranged above and below the diaphragm, and the two groups of transmission rollers are respectively composed of two first transmission rollers (7) and two second transmission rollers (701), and the two first transmission rollers (7) and the two second transmission rollers (701) are both provided with wiping cloths (702), and the first transmission rollers (7) and the second transmission rollers (701) are connected to each other through a driving component (8), and a drying component (9) is provided inside the box (1) below the driving component (8), and an actuator of the drying component (9) is located above the first transmission roller (7) and below the second transmission roller (701), and the drying component (9) is used to dry the wiping cloths (702).

2. A lithium battery diaphragm breakdown voltage detection device according to claim 1, characterized in that: The inlet wheel (501) and the outlet wheel (503) are on the same horizontal line, and the two guide wheels (502) are located below the inlet wheel (501) and the outlet wheel (503). Both ends of the inlet wheel (501) and the outlet wheel (503) are rotatably connected to the inner wall of the box body (1). Both ends of the two guide wheels (502) are movably mounted with a fixed plate (5021), and the top end of each fixed plate (5021) is fixedly connected to the inner top wall of the box body (1).

3. A lithium battery diaphragm breakdown voltage detection device according to claim 1, characterized in that: The lifting plate (601) is provided with a push-in groove (6011), and the liquid storage tank (6) is slidably installed in the push-in groove (6011). The end surface of the liquid storage tank (6) is fixedly connected to the end of the lifting plate (601) by bolts. A limiting plate (603) is welded to the side of the lifting plate (601) away from the moving block (604). The inner wall of the box body (1) is provided with a limiting groove (104), and the limiting plate (603) is slidably installed in the limiting groove (104). A sliding rod (6031) is passed through the limiting plate (603), and both ends of the sliding rod (6031) are fixedly connected to the groove wall of the limiting groove (104).

4. A lithium battery diaphragm breakdown voltage detection device according to claim 1, characterized in that: The two wiping cloths (702) are in contact with the upper surface and the lower surface of the diaphragm respectively, and shafts (703) are fixed to both ends of the two first transmission rollers (7) and the two second transmission rollers (701), and the end of each shaft (703) is rotatably connected to the partition (101) and the box body (1). The driving assembly (8) includes a driving motor (801), wherein a first sprocket (802) is fixed to the output end of the driving motor (801) and the shaft (703) of the second transmission roller (701), and the two first sprockets (802) are connected to each other via a first transmission chain (803), and a second sprocket (804) is fixed to the shaft (703) on the other side of the second transmission roller (701) and the shaft (703) of the first transmission roller (7), and the two second sprockets (804) are connected to each other via a second transmission chain (805), and the driving motor (801) is fixed to the box (1) via bolts.

5. The lithium battery diaphragm breakdown voltage detection device according to claim 1, characterized in that: The drying assembly (9) includes two drying plates (901), the two drying plates (901) are respectively located on the side of the two wiping cloths (702) away from the diaphragm, and the side of the two drying plates (901) close to the wiping cloths (702) are provided with a plurality of nozzles, and the side walls of the two drying plates (901) are connected to a vertical air inlet main pipe (903) through an air inlet branch pipe (902), and a heating box (904) is provided at the bottom end of the air inlet main pipe (903), and a heat insulation plate (9041) is horizontally fixed in the heating box (904), and a serpentine elbow (905) is installed above the heat insulation plate (9041), and a plurality of electromagnetic heating coils (9051) are provided on the serpentine elbow (905), and the bottom end of the air inlet main pipe (903) is connected to the top end of the serpentine elbow (905).

6. A lithium battery diaphragm breakdown voltage detection device according to claim 5, characterized in that: The bottom wall of the heating box (904) is fixed with an air pump (906) by bolts, the bottom end of the serpentine elbow (905) passes through the heat insulation board (9041) and is connected to the output port of the air pump (906), the air inlet of the air pump (906) is connected to an air intake pipe (9061), the air intake pipe (9061) passes through the wall of the box (1) and communicates with the outside, a filter is installed on the outer wall of the box (1) at the air intake pipe (9061), multiple groups of electromagnetic heating coils (9051) are fixedly connected to the box wall of the heating box (904) through brackets, and connecting rods (9011) are symmetrically fixed to the two side walls of the two drying plates (901), and the ends of each connecting rod (9011) are fixedly connected to the partition (101) and the box (1) respectively.

7. A lithium battery diaphragm breakdown voltage detection device according to claim 1, characterized in that: A first conductive block (6041) is fixed on the upper surface of the movable block (604); a fixed block (1012) is provided above the first conductive block (6041); the fixed block (1012) is fixedly connected to the partition (101); a second conductive block (1013) is fixed on the lower surface of the fixed block (1012); the first conductive block (6041) is in contact with the second conductive block (1013).

8. The lithium battery diaphragm breakdown voltage detection device according to claim 1, characterized in that: The detection electrode plate (3) is composed of an upper electrode plate (301) and a lower electrode plate (302), the upper electrode plate (301) and the lower electrode plate (302) are located above and below the diaphragm, and the upper electrode plate (301) and the lower electrode plate (302) are both provided with a metal positioning piece (303) on the side away from the diaphragm. An electrical voltage tester (102) is fixed to one side of the top of the box (1) by bolts. The two metal positioning pieces (303) are electrically connected to the electrical voltage tester (102) through wires. The upper electrode plate (301) and the lower electrode plate (302) are both connected to the outer wall of the box (1) through an adjustment component (4).

9. The lithium battery diaphragm breakdown voltage detection device according to claim 8, characterized in that: The two regulating assemblies (4) include L-shaped plates (401), one end surface of each of the L-shaped plates (401) is fixedly connected to the outer wall of the box body (1), an electric slide rail (402) is fixed to the inner wall of each of the L-shaped plates (401) close to the box body (1), a slider (403) is slidably mounted on each of the two electric slide rails (402), a connecting plate (404) is fixedly mounted on each of the two sliders (403), an insulating block (405) is fixed at the center of each of the sides of the upper electrode plate (301) and the lower electrode plate (302) away from the diaphragm, and the ends of the two connecting plates (404) are fixedly connected to the two insulating blocks (405), respectively.

10. A lithium battery diaphragm breakdown voltage detection device according to claim 9, characterized in that: The other end surfaces of the two L-shaped plates (401) are each provided with a guide rod (406), the ends of the two guide rods (406) are each fixedly connected to the connecting plate (404), and the two guide rods (406) are each sleeved with a support spring (407), the two ends of the two support springs (407) are respectively fixedly connected to the L-shaped plate (401) and the connecting plate (404).

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