Flow battery bipolar plate detection platform and working method thereof

Abstract

The invention relates to a flow battery bipolar plate detection platform and a working method thereof.The detection platform comprises a rack, a transverse driving assembly, a gantry seat frame, an adsorption platform, a meter mounting plate, a dial indicator, a longitudinal driving assembly, a vertical driving assembly and a resistance measuring head, a top panel is horizontally arranged at the top of the rack, and the adsorption platform is arranged in the middle of the top panel; the adsorption platform bears a bipolar plate sheet; the gantry seat frame is longitudinally arranged on the top panel in a spanning mode and transversely slides in a reciprocating mode along the top panel through the transverse driving assembly, the dial indicator installation plate is arranged on the front portion of the gantry seat frame, and the dial indicators are vertically installed on the front side wall of the dial indicator installation plate and arranged at equal intervals; the longitudinal driving assembly drives the vertical driving assembly and the resistance measuring head to move longitudinally, and the vertical driving assembly drives the resistance measuring head to move in the vertical direction and can abut against the upper surface of the bipolar plate sheet. According to the invention, a plurality of items can be clamped and measured at one time on the basis of not damaging the bipolar plate sheet, so that the manpower is saved and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bipolar plates for liquid flow batteries, and in particular to a detection platform for bipolar plates for liquid flow batteries and a working method thereof. Background Art

[0002] Liquid flow energy storage battery is a low-cost, high-efficiency, environmentally friendly liquid flow energy storage battery with the advantages of high energy density and high current efficiency, simple and easy to operate device, long service life and low cost. At present, the mainstream liquid flow batteries mainly include all-vanadium liquid flow battery, zinc-bromine liquid flow battery, iron-chromium liquid flow battery, etc. Liquid flow batteries are mainly used in the fields of power grid peak regulation, wind power and solar energy and other renewable energy power generation, electric vehicles, etc. The industrial-level liquid flow battery is formed in the form of multiple groups of units stacked in series to form a battery stack, in which the electrode plate is both the negative electrode of the previous battery unit and the positive electrode of the next battery unit, so it is called a bipolar plate. At present, in order to improve the toughness of the bipolar plate, more and more liquid flow battery bipolar plates on the market use carbon-added conductive sheets with thermoplastic resin substrates, that is, carbon-plastic composite bipolar plates, and use extrusion calendering technology to facilitate automated mass production.

[0003] The existing carbon-plastic composite bipolar plates are cut into rectangular sheets of 2 meters x 1.2 meters and then supplied to the battery assembly plant for further processing. As a supplier of carbon-plastic composite bipolar plates, the applicant needs to test the thickness, warpage, air tightness and resistivity of the rectangular bipolar plate sheets, but the existing testing methods are relatively simple. For example, measuring thickness and thickness deviation often requires using a micrometer to measure point by point, which is not only cumbersome, but also for such a large sheet, only the edge position can be measured. Because the internal thickness cannot be reached, it often needs to be destroyed and cut before measurement. The applicant's prior application, publication number CN219829828U, discloses a bipolar plate thickness measuring device for a flow battery, including a frame, a vacuum adsorption platform, a sliding guide assembly, a gantry frame, a measuring assembly, a vacuum generating assembly, and an electric control box. The vacuum adsorption platform is horizontally arranged on the top of the frame, and the top surface of the vacuum adsorption platform is a bipolar plate sheet adsorption and discharge area for the flow battery. The gantry frame is horizontally connected to the top of the frame through a sliding guide assembly, and the measuring assembly is vertically arranged on the crossbeam plate of the gantry frame. The measuring end of the measuring assembly slides with the gantry frame and can reciprocate along the long side direction of the bipolar plate sheet; the vacuum generating assembly for generating negative pressure is connected to the bottom of the vacuum adsorption platform through a pipeline, and the electric control box is electrically connected to the measuring assembly and the vacuum generating assembly. The bipolar plate thickness measuring device for a flow battery in the patent performs sliding measurement on the thickness uniformity of the sheet, which improves the inspection quality and efficiency of bipolar plate products to a certain extent. However, it only has one set of measuring components, and each sliding stroke can only measure the thickness deviation on one line, so its detection efficiency is still relatively low. At the same time, the device can only measure the thickness deviation and cannot automatically measure the resistivity of each part of the sheet.

[0004] In order to overcome the above problems, a liquid flow battery bipolar plate detection platform and a working method thereof are needed. Summary of the invention

[0005] The purpose of the present invention is to provide a liquid flow battery bipolar plate detection platform and a working method thereof, which can be equipped with a card to measure multiple items at one time without damaging the bipolar plate sheet, saving manpower and improving detection efficiency.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention discloses a flow battery bipolar plate detection platform, comprising a frame, a transverse drive assembly, a gantry frame, an adsorption platform, a meter mounting plate, a dial indicator, a longitudinal drive assembly, a vertical drive assembly and a resistance measuring head, wherein a top panel is horizontally arranged on the top of the frame, the adsorption platform is embedded in the middle of the top panel, and the adsorption platform is air-floated or adsorbs the bipolar plate sheet to be detected; the gantry frame is longitudinally straddled on the top panel and slides back and forth transversely along the top panel through the transverse drive assembly, the meter mounting plate is arranged at the front of the gantry frame, the dial indicator is vertically mounted on the front side wall of the meter mounting plate, and a plurality of dial indicators are arranged at equal intervals along the length direction of the meter mounting plate; the longitudinal drive assembly, the vertical drive assembly and the resistance measuring head are all mounted on the gantry frame, the longitudinal drive assembly drives the vertical drive assembly and the resistance measuring head to move longitudinally, and the vertical drive assembly drives the resistance measuring head to move vertically and can abut against the upper surface of the bipolar plate sheet.

[0008] Furthermore, the lateral drive assembly includes a linear motor guide rail and a linear motor, the two linear motor guide rails are horizontally laid on both sides of the top panel, the linear motor is mounted on the linear motor guide rails, and the bottom end of the gantry frame is fixedly connected to the top of the linear motor housing.

[0009] Furthermore, the longitudinal drive assembly includes a reduction motor and a slider, a longitudinal long hole is opened in the middle of the gantry frame crossbeam, the slider is guided and slidably connected in the longitudinal long hole, the output end of the reduction motor is connected to a lead screw, the lead screw is horizontally mounted in the middle position of the longitudinal long hole through bearings at both ends, and the lead screw transmission thread is connected to the slider; the vertical drive assembly and the resistance measuring head are installed on the slider.

[0010] Furthermore, the vertical drive assembly includes a cylinder 1 and a bottom mounting block, the cylinder 1 is a double-piston rod cylinder, the cylinder 1 is mounted head down on the slider, the two downward piston rod ends of the cylinder 1 are mounted on the bottom mounting block, and the resistance measuring head is vertically mounted on the side wall of the bottom mounting block.

[0011] Furthermore, it also includes cylinder three; a guide column is vertically arranged at the notch on the front side of the gantry frame, and the two ends of the table mounting plate are installed on the guide column through guide holes, and a compression spring is sleeved on the guide column, and the two ends of the compression spring abut against the bottom surface of the table mounting plate and the groove on the bottom surface of the notch of the gantry frame; the cylinder three is cantilevered on the top surface of the gantry frame crossbeam through a support plate, and the downward piston rod of the cylinder three can abut against the top surface of the table mounting plate.

[0012] Furthermore, it also includes a rotating assembly, which is arranged in the middle position of the rear side wall of the gantry frame beam, and the rotating assembly can clamp the bipolar plate sheet and rotate 90 degrees.

[0013] Furthermore, the rotating assembly includes a turntable support, a turntable, a second cylinder and a suction cup plate. The turntable support is installed at the middle position of the rear side wall of the gantry frame crossbeam by bolts, and the second cylinder is installed on the platform plate of the turntable support through the turntable. The suction cup plate is installed at the bottom of the piston rod of the second cylinder extending downward, and a suction cup for grabbing the bipolar plate sheet is provided at the bottom of the suction cup plate.

[0014] Furthermore, the adsorption platform includes an external adsorption area and a leak detection area, and the leak detection area is located in the middle of the external adsorption area; a rectangular sealing groove is arranged between the external adsorption area and the leak detection area, and a sealing ring is arranged in the sealing groove, and the contour of the sealing groove is smaller than the contour of the four sides of the bipolar plate sheet; the bottom gas collecting hood of the leak detection area is connected to the vacuum generating unit.

[0015] Furthermore, the air holes in the leak detection area include a coaxially arranged square groove and a through hole, a hollow support frame is arranged in the square groove, and the top surface of the hollow support frame is flush with the large surface of the adsorption platform.

[0016] The present invention also discloses a working method of a liquid flow battery bipolar plate detection platform, using any one of the liquid flow battery bipolar plate detection platforms described above to perform bipolar plate sheet detection operations, and the dial indicator and the resistance measuring head perform simultaneous measurements in one stroke of the gantry frame.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] The flow battery bipolar plate detection platform of the present invention is arranged with multiple dial indicators at equal intervals along the length direction of the meter mounting plate. When the gantry frame slides horizontally for one stroke, the thickness deviation of the positions of multiple measuring lines in the width direction of the bipolar plate sheet can be measured; the resistance measuring head adopts the longitudinal drive component and the vertical drive component installation method, so that the resistivity measurement can be achieved by selecting multiple points in any one of the upper surfaces of the bipolar plate sheet. The flow battery bipolar plate detection platform of the present invention can measure multiple items at one time without damaging the bipolar plate sheet, which saves manpower and improves detection efficiency.

[0019] In addition, the slider is driven to move back and forth longitudinally by the lead screw to realize the measurement after the resistance measuring head stops at any position in the width direction of the bipolar plate sheet; the bottom mounting block is driven to move vertically by the cylinder 1, so that the bottom end of the resistance measuring head can measure and contact the bipolar plate sheet and return to reset. The resistance measuring head is installed by the mounting seat 2, which is convenient for adjusting the installation height of the resistance measuring head. By setting the cylinder 3, the guide column and the compression spring, the meter mounting plate can be switched between the high position state and the low position state, thereby realizing the switching of the two states of measurement and non-measurement of the dial indicator. At the same time, when the meter mounting plate is in the high position state, the bottom end of the dial indicator measurement falls off the bipolar plate sheet, so that when the rotating assembly clamps the rotation degree of the bipolar plate sheet, there will be no interference, thereby protecting the dial indicator. By adding a leak detection area in the middle of the adsorption platform, it is not only possible to float or adsorb the bipolar plate sheet, but also to perform a high negative pressure air tightness test on the bipolar plate sheet. The tops of the air holes in the leak detection area are all set as square grooves, which can increase the air extraction area and reduce the blind area where the hole edge cannot effectively detect the leak after the bipolar plate sheet is attached; by adding a hollow support frame in the square groove, the bipolar plate sheet is prevented from being adsorbed, deformed and damaged during the air tightness test. The limit assembly is set in front of the bipolar plate sheet, which can initially limit the bipolar plate sheet to facilitate measurement and centering; two cylinder supports are installed through the guide groove, which can adjust the distance between the two limit assemblies, and even if the bipolar plate sheets of different width specifications are tested, the rear limit can be adjusted.

[0020] The working method of the flow battery bipolar plate detection platform of the present invention performs thickness deviation and resistivity tests simultaneously, thereby improving detection efficiency. By first performing an airtightness test and then measuring the thickness deviation, the bipolar plate sheet can be flattened by adsorbing the negative pressure of a high vacuum degree, thereby reducing excessive thickness deviation caused by warping; by rotating the bipolar plate sheet through the rotating assembly, the bipolar plate sheet can be measured in a grid-like manner, and the data is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the main structure of the bipolar plate detection platform for a flow battery of the present invention;

[0023] Figure 2 This is a schematic diagram of the top view of the structure of the bipolar plate detection platform for a flow battery of the present invention;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the gantry frame of the present invention;

[0025] Figure 4 It is a schematic diagram of the top view of the adsorption platform of the present invention;

[0026] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of part A in the middle.

[0027] Description of reference numerals: 1. frame; 101. top panel; 102. linear motor guide rail; 103. guide groove; 2. gantry frame; 201. linear motor; 202. guide column; 3. adsorption platform; 301. outer adsorption area; 3011. round hole; 302. sealing groove; 303. leak detection area; 3031. hollow support frame; 3032. through hole; 304. gas collecting cover; 305. shield; 4. table Mounting plate; 5. Mounting seat 1; 6. Dial indicator; 7. Reducer motor; 701, Screw; 8. Slider; 9. Cylinder 1; 10. Bottom mounting block; 11. Resistance measuring head; 12. Turntable support; 13. Turntable; 14. Cylinder 2; 15. Suction cup plate; 16. Mounting seat 2; 17. Cylinder 3; 18. Cylinder 4; 19. Limit plate; 20. Cylinder support; 21. Touch screen; 22. Bipolar plate sheet. DETAILED DESCRIPTION

[0028] The core of the present invention is to provide a liquid flow battery bipolar plate detection platform and a working method thereof, which can be equipped with a card to measure multiple items at one time without damaging the bipolar plate sheets, saving manpower and improving detection efficiency.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] With reference to the accompanying drawings, Figure 1 This is a schematic diagram of the main structure of the bipolar plate detection platform for a flow battery of the present invention; Figure 2 This is a schematic diagram of the top view of the structure of the bipolar plate detection platform for a flow battery of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the gantry frame of the present invention; Figure 4 It is a schematic diagram of the top view of the adsorption platform of the present invention; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of part A in the middle.

[0032] In a specific embodiment, Figures 1 to 5 As shown, the flow battery bipolar plate detection platform of the present invention includes a frame 1, a transverse drive assembly, a gantry frame 2, an adsorption platform 3, a meter mounting plate 4, a dial gauge 6, a longitudinal drive assembly, a vertical drive assembly and a resistance measuring head 11. A top panel 101 is horizontally arranged on the top of the frame 1, and the adsorption platform 3 is embedded in the middle of the top panel 101. The adsorption platform 3 floats or adsorbs the bipolar plate sheet 22 to be detected. The area of ​​the adsorption platform 3 is larger than the bipolar plate sheet 22, and the bipolar plate sheet 22 placed horizontally or vertically can be adsorbed. The bottom of the adsorption platform 3 is connected to the fan through multiple air collecting hoods 304, and a protective shield 305 is also provided outside the air collecting hood 304 for protection. When the fan sucks air under negative pressure, the adsorption platform 3 adsorbs the bipolar plate sheet 22 to be measured. When the fan blows air, the adsorption platform 3 blows air to make the bipolar plate sheet 22 suspended for easy movement. The gantry frame 2 is longitudinally arranged across the top panel 101 and slides back and forth transversely along the top panel 101 through the transverse drive assembly. The meter mounting plate 4 is arranged at the front of the gantry frame 2, and the dial gauge 6 is vertically mounted on the front side wall of the meter mounting plate 4. A plurality of dial gauges 6 are arranged at equal intervals along the length direction of the meter mounting plate 4, and the length of the meter mounting plate 4 is greater than the length of the bipolar plate sheet 22. The longitudinal drive assembly, the vertical drive assembly and the resistance measuring head 11 are all installed on the gantry frame 2, and the longitudinal drive assembly drives the vertical drive assembly and the resistance measuring head 11 to move longitudinally. The vertical drive assembly drives the resistance measuring head 11 to move in the vertical direction, and the measuring end of the resistance measuring head 11 can abut against the upper surface of the bipolar plate sheet 22.

[0033] Specifically, if Figure 3 As shown, the resistance measuring head 11 adopts a four-pin resistance measuring terminal, which can measure both square resistance and resistivity.

[0034] Specifically, if Figure 3 As shown, the dial gauge 6 is mounted on the front side wall of the gauge mounting plate 4 through a mounting seat 5, and the vertical cylinder of the mounting seat 5 is sleeved on the top circular tube of the dial gauge 6 and is tightened and installed through a top screw.

[0035] By setting a plurality of dial gauges 6 and arranging them at equal intervals along the length direction of the gauge mounting plate 4, when the gantry frame 2 slides horizontally for one stroke, the thickness deviation of the positions of the plurality of measuring lines in the width direction of the bipolar plate sheet 22 can be measured; the resistance measuring head 11 can select multiple points in any one of the entire upper surface range of the bipolar plate sheet 22 for resistivity measurement by adopting the longitudinal drive assembly and the vertical drive assembly installation method. The flow battery bipolar plate detection platform of the present invention can measure multiple items at one time without damaging the bipolar plate sheet, saving manpower and improving detection efficiency.

[0036] In a specific embodiment of the present invention, Figures 1 to 3 As shown, the lateral drive assembly includes a linear motor guide rail 102 and a linear motor 201. The two linear motor guide rails 102 are horizontally laid on both sides of the top panel 101. The linear motor 201 is installed on the linear motor guide rails 102. The bottom end of the gantry frame 2 is fixedly connected to the top of the outer shell of the linear motor 201.

[0037] Obviously, the lateral drive assembly can also be driven by a hydraulic cylinder. A slider is set at the bottom end of the gantry frame 2 to guide and slide on the lateral guide rail. The two hydraulic cylinders operate synchronously to drive the two bottom ends of the gantry frame 2 to perform lateral reciprocating linear motion.

[0038] In a specific embodiment of the present invention, Figure 2 and Figure 3 As shown, the longitudinal drive assembly includes a reduction motor 7 and a slider 8. A longitudinal long hole is opened in the middle of the crossbeam of the gantry frame 2, and the slider 8 is guided and slidably connected in the longitudinal long hole. The output end of the reduction motor 7 is connected to a lead screw 701, which is horizontally mounted at the middle position of the longitudinal long hole through bearings at both ends, and the lead screw 701 is threadedly connected to the slider 8. The vertical drive assembly and the resistance measuring head 11 are installed on the slider 8. The length of the lead screw 701 is greater than the width of the bipolar plate sheet 22.

[0039] Specifically, if Figure 3 As shown, the slider 8 is provided with protrusions on both the front and rear sides, and a slide rail groove is correspondingly opened on the side wall of the longitudinal long hole, and the protrusion is guided and slidably connected in the slide rail groove.

[0040] Specifically, if Figure 2 and Figure 3 As shown, the vertical drive assembly includes a cylinder 9 and a bottom mounting block 10. The cylinder 9 is a double piston rod cylinder, which is mounted head-down on the slider 8, and the two downward piston rod ends of the cylinder 9 are mounted on the bottom mounting block 10, and the resistance measuring head 11 is vertically mounted on the side wall of the bottom mounting block 10.

[0041] Specifically, if Figure 3 As shown, the resistance measuring head 11 is mounted on the rear side wall of the bottom mounting block 10 through the second mounting seat 16, and the top round rod portion of the resistance measuring head 11 is inserted into the cylinder of the second mounting seat 16 and locked using a top screw.

[0042] The slider 8 is driven to move longitudinally by the lead screw 701 to realize the resistance measuring head 11 to stop and measure at any position in the width direction of the bipolar plate sheet 22; the bottom mounting block 10 is driven to move vertically by the cylinder 1 9, so that the bottom end of the resistance measuring head 11 contacts the bipolar plate sheet 22 and returns to reset. The resistance measuring head 11 is installed by the mounting seat 2 16, so that the installation height of the resistance measuring head 11 can be adjusted.

[0043] In a specific embodiment of the present invention, Figures 1 to 3 As shown, the flow battery bipolar plate detection platform of the present invention also includes a cylinder three 17. A guide column 202 is vertically arranged at the notch on the front side of the gantry frame 2, and both ends of the meter mounting plate 4 are installed on the guide column 202 through guide holes. A compression spring is sleeved on the guide column 202, and both ends of the compression spring abut against the grooves on the bottom surface of the meter mounting plate 4 and the bottom surface of the notch of the gantry frame 2. In other words, the compression spring is semi-buried. Under normal circumstances, the compression spring is reset, and the meter mounting plate 4 is in a high position. At this time, the measuring bottom end of the dial indicator 6 does not contact the bipolar plate sheet 22. The cylinder three 17 is cantilevered on the top surface of the crossbeam of the gantry frame 2 through the support plate, and the downward piston rod of the cylinder three 17 can abut against the top surface of the meter mounting plate 4. That is to say, when cylinder three 17 is pushed downward, the piston rod can abut against the top surface of the meter mounting plate 4 to press the meter mounting plate 4 downward, and the compression spring is pressed into the groove, and the bottom surface of the meter mounting plate 4 contacts the bottom surface of the notch to enter a low stable state. At this time, the measuring bottom end of the dial indicator 6 contacts the bipolar plate sheet 22.

[0044] Specifically, if Figures 1 to 3 As shown, the number of cylinder three 17 is two and they are respectively arranged at both ends of the table mounting plate 4. The two cylinder three 17 act synchronously.

[0045] Specifically, if Figures 1 to 3 As shown, the flow battery bipolar plate detection platform of the present invention also includes a rotating assembly, which is arranged in the middle position of the rear side wall of the crossbeam of the gantry frame 2, and the rotating assembly can clamp the bipolar plate sheet 22 and rotate 90 degrees.

[0046] By setting the cylinder 3 17, the guide column 202 and the compression spring, the meter mounting plate 4 can be switched between the high position state and the low position state, thereby realizing the switching between the measuring state and the non-measuring state of the dial gauge 6. At the same time, when the meter mounting plate 4 is in the high position state, the measuring bottom end of the dial gauge 6 and the bipolar plate sheet 22 fall off, so that when the rotating assembly clamps the bipolar plate sheet 22 and rotates 90 degrees, no interference occurs, thereby protecting the dial gauge 6.

[0047] Specifically, if Figures 1 to 3As shown, the rotating assembly includes a turntable support 12, a turntable 13, a cylinder 2 14 and a suction cup plate 15. The turntable support 12 is installed on the middle position of the rear side wall of the cross beam of the gantry frame 2 by bolts, and the cylinder 2 14 is vertically installed on the platform plate of the turntable support 12 through the turntable 13. The turntable 13 can drive the cylinder 2 14 to rotate horizontally. The suction cup plate 15 is installed at the bottom of the piston rod of the cylinder 2 14 protruding downward. The cylinder 2 14 is a double piston rod cylinder to avoid rotation relative to the cylinder barrel. A suction cup for grabbing the bipolar plate sheet 22 is provided at the bottom of the suction cup plate 15, and the suction cup is connected to the negative pressure generator through a hose. The turntable 13 is an electric turntable.

[0048] Obviously, the rotating assembly can also use a rotating cylinder to replace the rotating disk 13, and the suction cup plate 15 can be directly replaced by a large suction cup. Similar simple replacement methods all fall within the protection scope of the present invention.

[0049] Specifically, if Figure 1 and Figure 2 As shown, the flow battery bipolar plate detection platform of the present invention also includes an electronic control system and a touch screen 21, and the touch screen 21 is installed on the frame 1 and electrically connected to the electronic control system. The electronic control system controls the actions of cylinder 1 9, cylinder 2 14, cylinder 3 17, linear motor 201, reduction motor 7 and turntable 13. The dial gauge 6 is an electronic dial gauge, and the resistance measuring head 11 and the dial gauge 6 are both electrically connected to the electronic control system for data transmission. Of course, wireless connection can also be used for data transmission, such as with Bluetooth function.

[0050] In a specific embodiment of the present invention, Figure 2 , Figure 4 and Figure 5 As shown, the adsorption platform 3 includes an outer adsorption area 301 and a leak detection area 303, and the leak detection area 303 is located in the middle of the outer adsorption area 301. A rectangular sealing groove 302 is provided between the outer adsorption area 301 and the leak detection area 303, and a sealing ring is provided in the sealing groove 302. The sealing ring is an O-ring, and the O-ring is not more than 0.3 mm higher than the large surface of the adsorption platform 3, and can be sucked flat when the adsorption platform 3 is adsorbed. The contour of the sealing groove 302 is smaller than the contour of the four sides of the bipolar plate sheet 22. When the bipolar plate sheet 22 is stacked on the leak detection area 303, the surrounding area of ​​the sealing groove 302 is not less than one centimeter. The bottom gas collecting cover 304 of the leak detection area 303 is also connected to the vacuum generating unit.

[0051] The vacuum generating unit specifically adopts a vacuum pump, and the vacuum pump works only when the air tightness test is performed. When negative pressure adsorption is performed, the fan can just draw negative pressure.

[0052] Specifically, if Figure 4 and Figure 5As shown, the air hole of the leak detection area 303 includes a square groove and a through hole 3032 arranged coaxially, the square groove is located directly above the through hole 3032, a hollow support frame 3031 is arranged in the square groove, and the top surface of the hollow support frame 3031 is flush with the large surface of the adsorption platform 3. The air hole of the outer adsorption area 301 is a circular hole 3011.

[0053] By adding a leak detection area 303 in the middle of the adsorption platform 3, not only can the bipolar plate sheet 22 be floated or adsorbed, but also a high negative pressure air tightness test can be performed on the bipolar plate sheet 22. The tops of the air holes in the leak detection area 303 are all set as square grooves, which can increase the air extraction area and reduce the blind area where the hole edge and the bipolar plate sheet 22 cannot be effectively leaked after being attached; by adding a hollow support frame 3031 in the square groove, the bipolar plate sheet 22 can be prevented from being deformed and damaged by adsorption during the air tightness test.

[0054] In a specific embodiment of the present invention, Figure 1 and Figure 2 As shown, the flow battery bipolar plate detection platform of the present invention further includes a limiting assembly, which is arranged on the front top surface of the top panel 101, and two sets of the limiting assemblies are symmetrically arranged about the transverse center line of the top panel 101. The limiting assembly limits the two right angles of the bipolar plate sheet 22 facing forward.

[0055] Specifically, if Figure 1 and Figure 2 As shown, the limiting assembly includes a cylinder 18, a limiting plate 19 and a cylinder support 20. A guide groove 103 is longitudinally provided on the front top surface of the top panel 101, and a pre-embedded slider is provided in the guide groove 103. The cylinder support 20 is installed on the top panel 101 through the pre-embedded slider, and the end face of the cylinder 18 is installed on the cylinder support 20 and the piston rod faces the bipolar plate sheet 22. The limiting plate 19 is L-shaped, and the inner corner of the limiting plate 19 limits the bipolar plate sheet 22 at a right angle to the front.

[0056] By arranging the limit assembly in front of the bipolar plate sheet 22, the inserted bipolar plate sheet 22 can be initially limited, which is convenient for measurement and centering; by installing two cylinder supports 20 through the guide groove 103, the distance between the two limit assemblies can be adjusted, and the rear limit can be adjusted even when testing bipolar plate sheets 22 of different width specifications.

[0057] In summary, the liquid flow battery bipolar plate detection platform of the present invention is arranged at equal intervals along the length direction of the meter mounting plate 4 by setting a plurality of dial gauges 6. When the gantry frame 2 slides horizontally for a stroke, the thickness deviation of the positions of the plurality of measuring lines in the width direction of the bipolar plate sheet 22 can be measured; the resistance measuring head 11 can realize the resistivity measurement of any item in the entire upper surface range of the bipolar plate sheet 22 by adopting the longitudinal drive component and the vertical drive component installation method. The liquid flow battery bipolar plate detection platform of the present invention can measure multiple items at one time without damaging the bipolar plate sheet, saving manpower and improving the detection efficiency. In addition, the slider 8 is driven to move back and forth longitudinally by the lead screw 701 to realize the measurement after the resistance measuring head 11 stops at any position in the width direction of the bipolar plate sheet 22; the bottom mounting block 10 is driven to move vertically by the cylinder 9, so that the bottom end of the resistance measuring head 11 contacts the bipolar plate sheet 22 and returns to reset. The resistance measuring head 11 is installed through the mounting seat 2 16, which is convenient for adjusting the installation height of the resistance measuring head 11. By setting the cylinder 3 17, the guide column 202 and the compression spring, the meter mounting plate 4 can be switched between the high state and the low state, thereby realizing the switching of the two states of measuring and non-measuring of the dial gauge 6. At the same time, when the meter mounting plate 4 is in the high state, the bottom end of the dial gauge 6 and the bipolar plate sheet 22 fall off, so that when the rotating assembly clamps the bipolar plate sheet 22 and rotates 90 degrees, there will be no interference, thereby protecting the dial gauge 6. By adding a leak detection area 303 in the middle of the adsorption platform 3, not only can the bipolar plate sheet 22 be floated or adsorbed, but also the bipolar plate sheet 22 can be tested for air tightness under high negative pressure. The tops of the air holes in the leak detection area 303 are all set as square grooves, which can increase the air extraction area and reduce the blind area where the hole edge cannot effectively detect the leak after being attached to the bipolar plate sheet 22; by adding a hollow support frame 3031 in the square groove, the bipolar plate sheet 22 is prevented from being adsorbed, deformed and damaged during the air tightness test. The limit assembly is set in front of the bipolar plate sheet 22, and the initial limit of the bipolar plate sheet 22 can be put in, which is convenient for measurement and centering; two cylinder supports 20 are installed through the guide groove 103, and the distance between the two limit assemblies can be adjusted. Even if the bipolar plate sheets 22 of different width specifications are tested, the rear limit can be adjusted.

[0058] The present invention also discloses a working method of a flow battery bipolar plate detection platform, which uses the flow battery bipolar plate detection platform in any of the above embodiments to perform a detection operation of the bipolar plate sheet 22. The working method of the flow battery bipolar plate detection platform of the present invention comprises the following steps:

[0059] Step 1, discharge, operate the touch screen 21, the fan enters the blowing state, the outer adsorption area 301 and the leak detection area 303 of the adsorption platform 3 both exhaust air evenly outward, and enter the air flotation platform state; the cylinder four 18 is pushed out, and the limit plate 19 enters the limit state. The operator places the bipolar plate sheet 22 on the adsorption platform 3, and pays attention to the long side of the bipolar plate sheet 22 along the horizontal direction of the equipment. In the air flotation state, it is only necessary to slightly correct the feeding direction of the bipolar plate sheet 22, and put its two right angles forward between the two limit plates 19. Operate the touch screen 21, the fan enters the exhaust state, the outer adsorption area 301 and the leak detection area 303 of the adsorption platform 3 both exhaust air inward, enter the adsorption platform state, and the bipolar plate sheet 22 is sucked flat on the adsorption platform 3. The cylinder four 18 drives the limit plate 19 to retreat.

[0060] Step 2, air tightness test, the operator observes whether the bipolar plate sheet 22 completely covers the sealing groove 302. After confirming that it is correct, the operator operates the touch screen 21, the vacuum pump enters the working state, and the negative pressure corresponding to the chamber below the leak detection area 303 begins to increase. When the set negative pressure value is reached, the vacuum pump stops working. Observe whether the negative pressure value corresponding to the leak detection area 303 decreases within 12 minutes. If it does not decrease, it is considered qualified.

[0061] Step 3, a thickness deviation and resistivity test, the lower chamber corresponding to the leak detection area 303 releases the test negative pressure, and the fan is used again for suction adsorption; the touch screen 21 is controlled, the linear motor 201 drives the gantry frame 2 to enter the upper rear end of the bipolar plate sheet 22, the cylinder 17 pushes out to press the meter mounting plate 4 down to the low position, and the dial gauge 6 enters the measurement state, at which time the multiple dial gauges 6 in the middle position are in contact with the top surface of the bipolar plate sheet 22. The linear motor 201 drives the gantry frame 2 to slowly move from the rear end to the front end of the bipolar plate sheet 22, and each dial gauge 6 feeds back the measured thickness deviation to the electronic control system. Moreover, this process is an intermittent movement, a temporary interval, according to the set program, the reduction motor 7 drives the lead screw 701 to rotate, the slider 8 slides in the longitudinal long hole to multiple set test positions, the cylinder 1 9 makes a push-out retraction action, and the bottom end of the resistance measuring head 11 measures the resistivity of the contact bipolar plate sheet 22 at this point and feeds back to the electronic control system.

[0062] Step 4, rotating the bipolar plate sheet 22. After step 3, the cylinder three 17 is retracted, the meter mounting plate 4 is reset to the high position under the action of the compression spring, the resistance measuring head 11 is also pulled back by the cylinder one 9, and the linear motor 201 drives the gantry frame 2 to move so that the suction cup plate 15 is located at the center of the bipolar plate sheet 22. The touch screen 21 is operated, and the cylinder two 14 pushes out to press the suction cup plate 15 onto the top surface of the bipolar plate sheet 22, and the suction cup under the suction cup plate 15 grabs the bipolar plate sheet 22. The fan starts to blow air, and the adsorption platform 3 enters the air flotation platform state again. The turntable 13 rotates 90 degrees, and the suction cup plate 15 drives the bipolar plate sheet 22 to rotate 90 degrees on the air flotation platform. The fan starts to exhaust air, and the adsorption platform 3 returns to the adsorption state, and the bipolar plate sheet 22 is sucked flat onto the adsorption platform 3 again. The suction cup of the suction cup plate 15 releases the bipolar plate sheet 22 , and the cylinder 2 14 retracts the suction cup plate 15 .

[0063] Step 4, secondary thickness deviation test, control the touch screen 21, the linear motor 201 drives the gantry frame 2 to enter the upper front end of the longitudinally placed bipolar plate sheet 22, the cylinder 3 17 pushes out to press the meter mounting plate 4 down to the low position, and the dial gauge 6 enters the measuring state, at which time the multiple dial gauges 6 in the middle position are in contact with the top surface of the long side direction of the bipolar plate sheet 22. The linear motor 201 drives the gantry frame 2 to slowly move from the front end to the rear end of the bipolar plate sheet 22, and each dial gauge 6 feeds back the measured thickness deviation to the electronic control system.

[0064] Step 5, unloading, operate the touch screen 21, the fan starts blowing, the adsorption platform 3 enters the air flotation platform state again, and the bipolar plate sheet 22 that has completed the test is taken out from the unloading and loading side of the equipment.

[0065] The working method of the flow battery bipolar plate detection platform of the present invention performs thickness deviation and resistivity tests simultaneously, thereby improving detection efficiency. By first performing an airtightness test and then measuring the thickness deviation, the bipolar plate sheet 22 can be flattened by adsorbing the negative pressure of a high vacuum degree, thereby reducing excessive thickness deviation caused by warping; by rotating the bipolar plate sheet 22 through the rotating assembly, the thickness deviation of the bipolar plate sheet 22 can be measured in a grid format, and the data is more accurate.

[0066] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0067] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A flow battery bipolar plate detection platform, characterized in that: The invention comprises a frame (1), a transverse drive assembly, a gantry frame (2), an adsorption platform (3), a meter mounting plate (4), a dial indicator (6), a longitudinal drive assembly, a vertical drive assembly and a resistance measuring head (11); a top panel (101) is horizontally arranged on the top of the frame (1); the adsorption platform (3) is embedded in the middle of the top panel (101); the adsorption platform (3) floats or adsorbs bipolar plate sheets (22) to be tested; the gantry frame (2) is longitudinally straddled on the top panel (101) and slides back and forth laterally along the top panel (101) through the transverse drive assembly; The meter mounting plate (4) is arranged at the front of the gantry frame (2); the dial gauge (6) is vertically mounted on the front side wall of the meter mounting plate (4); and a plurality of dial gauges (6) are arranged at equal intervals along the length direction of the meter mounting plate (4); the longitudinal drive assembly, the vertical drive assembly and the resistance measuring head (11) are all mounted on the gantry frame (2); the longitudinal drive assembly drives the vertical drive assembly and the resistance measuring head (11) to move longitudinally; and the vertical drive assembly drives the resistance measuring head (11) to move vertically and can abut against the upper surface of the bipolar plate sheet (22).

2. The flow battery bipolar plate detection platform according to claim 1, characterized in that: The lateral drive assembly comprises a linear motor guide rail (102) and a linear motor (201), wherein the two linear motor guide rails (102) are laid transversely on both sides of the top panel (101), the linear motor (201) is mounted on the linear motor guide rails (102), and the bottom end of the gantry frame (2) is fixedly connected to the top of the housing of the linear motor (201).

3. The flow battery bipolar plate detection platform according to claim 1, characterized in that: The longitudinal drive assembly comprises a reduction motor (7) and a slider (8); a longitudinal long hole is opened in the middle of the cross beam of the gantry frame (2); the slider (8) is connected to the longitudinal long hole in a guiding and sliding manner; a lead screw (701) is connected to the output end of the reduction motor (7); the lead screw (701) is horizontally mounted at the middle position of the longitudinal long hole through bearings at both ends; the lead screw (701) is connected to the slider (8) through a transmission thread; the vertical drive assembly and the resistance measuring head (11) are mounted on the slider (8).

4. The flow battery bipolar plate detection platform according to claim 3, characterized in that: The vertical drive assembly comprises a cylinder (9) and a bottom mounting block (10); the cylinder (9) is a double piston rod cylinder; the cylinder (9) is mounted head-down on the slider (8); the two downward piston rod ends of the cylinder (9) are mounted on the bottom mounting block (10); and the resistance measuring head (11) is vertically mounted on the side wall of the bottom mounting block (10).

5. The flow battery bipolar plate detection platform according to claim 1, characterized in that: It also includes a cylinder three (17); a guide column (202) is vertically arranged at the notch on the front side of the gantry frame (2); the two ends of the table mounting plate (4) are mounted on the guide column (202) through guide holes; a compression spring is sleeved on the guide column (202); the two ends of the compression spring abut against the bottom surface of the table mounting plate (4) and the groove on the bottom surface of the notch of the gantry frame (2); the cylinder three (17) is cantilevered on the top surface of the crossbeam of the gantry frame (2) through a support plate, and the downward piston rod of the cylinder three (17) can abut against the top surface of the table mounting plate (4).

6. The flow battery bipolar plate detection platform according to claim 5, characterized in that: It also includes a rotating assembly, which is arranged in the middle of the rear side wall of the crossbeam of the gantry frame (2), and is capable of clamping the bipolar plate sheet (22) and rotating 90 degrees.

7. The flow battery bipolar plate detection platform according to claim 6, characterized in that: The rotating assembly comprises a turntable support (12), a turntable (13), a second cylinder (14) and a suction cup plate (15); the turntable support (12) is mounted on the middle position of the rear side wall of the cross beam of the gantry frame (2) by means of bolts; the second cylinder (14) is mounted on the platform plate of the turntable support (12) through the turntable (13); the suction cup plate (15) is mounted on the bottom of the piston rod of the second cylinder (14) protruding downward; and a suction cup for grabbing the bipolar plate sheet (22) is arranged at the bottom of the suction cup plate (15).

8. The flow battery bipolar plate detection platform according to claim 6, characterized in that: The adsorption platform (3) comprises an outer adsorption area (301) and a leak detection area (303), wherein the leak detection area (303) is located in the middle of the outer adsorption area (301); a rectangular sealing groove (302) is provided between the outer adsorption area (301) and the leak detection area (303), a sealing ring is provided in the sealing groove (302), and the contour of the sealing groove (302) is smaller than the contour of the four sides of the bipolar plate sheet (22); and a gas collecting hood (304) at the bottom of the leak detection area (303) is connected to a vacuum generating unit.

9. The flow battery bipolar plate detection platform according to claim 8, characterized in that: The air hole of the leak detection area (303) comprises a square groove and a through hole (3032) arranged coaxially, a hollow support frame (3031) is arranged in the square groove, and the top surface of the hollow support frame (3031) is flush with the large surface of the adsorption platform (3).

10. A working method of a flow battery bipolar plate detection platform, characterized in that: The bipolar plate inspection platform for liquid flow batteries described in any one of claims 1 to 9 is used to perform inspection operations on bipolar plate sheets (22), and the dial indicator (6) and the resistance measuring head (11) perform simultaneous measurements in one stroke of the gantry frame (2).

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