Rapid positioning tool for measuring contact resistance of bipolar plate

Abstract

The utility model discloses a quick-positioning tool for measuring the contact resistance of a bipolar plate, which comprises a detection block, a clamping and positioning mechanism and a fixed seat. According to the rapid positioning tool for measuring the contact resistance of the bipolar plate, the bipolar plate to be detected is clamped and fixed through the two detection blocks and the upper clamping positioning plate and the lower clamping positioning plate in the clamping positioning mechanism; the clamping surfaces of the upper clamping positioning plate and the lower clamping positioning plate are provided with steps used for positioning the bipolar plate in one direction, the steps can position the bipolar plate in one direction, then the limiting baffle at one end of the limiting plate is used for limiting the bipolar plate in the other direction, and limiting of the detection position of the bipolar plate is achieved. And the position of the limiting plate is adjustable, so that the position of the limiting baffle plate is adjustable, and the detection position of the bipolar plate is adjustable.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel cells, and in particular relates to a tool for measuring the contact resistance of a bipolar plate which can be positioned quickly. Background Art

[0002] Bipolar plates are core components of electrochemical devices such as fuel cells and water electrolysis to produce hydrogen. Improving their performance is of great significance to electrochemical devices such as fuel cells and water electrolysis to produce hydrogen.

[0003] The contact resistance of bipolar plates has a great influence on the electrical performance of fuel cells and is the main source of internal resistance of fuel cells. The measurement of bipolar plate contact resistance has always been a research hotspot.

[0004] Since the smooth area of ​​the bipolar plate is large, there are differences in contact resistance when testing different positions of the bipolar plate. In order to ensure that the tested contact resistance of the bipolar plates is comparable, it is very important to test the contact resistance of the bipolar plates at the same position.

[0005] The utility model with the authorization announcement number CN210181125U discloses a contact resistance detection device for a metal bipolar plate of a fuel cell, including a base plate, a pressure plate, a guide rod, a push rod cylinder, a gold-plated copper block, an insulating plate and a weight; the pressure plate is located above the base plate; the push rod cylinder is used to control the distance between the pressure plate and the base plate, and the two ends are respectively fixed to the base plate and the pressure plate; the bottom of the guide rod is fixed to the base plate, and the top passes through the pressure plate and is slidably connected to the pressure plate; the upper surface of the base plate and the lower surface of the pressure plate are respectively fixedly installed with an insulating plate and a gold-plated copper block, and the insulating plate and the gold-plated copper block on the pressure plate correspond to the positions of the insulating plate and the gold-plated copper block on the base plate; the weight is fixedly installed on the upper surface of the pressure plate. However, in this prior art, the detection position of the bipolar plate cannot be well positioned. Utility Model Content

[0006] The utility model aims at the above-mentioned deficiencies existing in the prior art and provides a tool for measuring the contact resistance of a bipolar plate which can be positioned quickly.

[0007] A tool for measuring bipolar plate contact resistance that can be quickly positioned, comprising:

[0008] A detection block, comprising an upper detection block and a lower detection block, wherein the upper detection block and the lower detection block are used to clamp the bipolar plate to be detected from upper and lower sides;

[0009] The clamping and positioning mechanism comprises an upper clamping and positioning plate and a lower clamping and positioning plate, wherein the upper clamping and positioning plate and the lower clamping and positioning plate respectively have avoidance holes for avoiding the detection block, and the upper clamping and positioning plate and the lower clamping and positioning plate cooperate with the detection block to clamp and fix the bipolar plate to be detected, and the clamping surfaces of the upper clamping and positioning plate and the lower clamping and positioning plate are provided with steps for positioning the bipolar plate in one direction; the clamping and positioning mechanism also comprises a limit plate provided on the upper clamping and positioning plate or the lower clamping and positioning plate, and one end of the limit plate is provided with a limit baffle for positioning the bipolar plate in another direction, and the position of the limit plate is adjustable so that the position of the limit baffle is adjustable;

[0010] The fixing seat comprises an upper fixing seat and a lower fixing seat, wherein the bottom surface of the upper fixing seat has an upper receiving groove for installing the upper detection block, and the top surface of the lower fixing seat has a lower receiving groove for installing the lower detection block.

[0011] Preferably, the upper detection block and the lower detection block are both cylindrical structures, and are copper with gold-plated surfaces;

[0012] The sides of the upper detection block and the lower detection block are both provided with detection holes for the probe ends of the contact resistance tester to extend into during detection.

[0013] Preferably, the upper clamping and positioning plate and the lower clamping and positioning plate are both provided with avoidance grooves on the sides facing away from each other for the probe fixture of the contact resistance tester to pass through during testing.

[0014] Preferably, a positioning hole and a positioning column for mutual cooperation in positioning are provided between the upper clamping positioning plate and the lower clamping positioning plate, and the positioning hole is provided on one of the upper clamping positioning plate and the lower clamping positioning plate, and the positioning column is provided on the other one.

[0015] Preferably, the limiting plate has an axially arranged waist-shaped hole, and the limiting plate is fixed to one side of the bottom surface of the lower clamping positioning plate by means of bolts passing through the waist-shaped hole.

[0016] Preferably, the fixing seat further comprises an upper module and a lower module, the bottom surface of the upper module has an upper mounting groove for mounting the upper fixing seat; the top surface of the lower module has a lower mounting groove for mounting the lower fixing seat;

[0017] The clamping and positioning mechanism is detachably mounted and fixed to the upper module or the lower module.

[0018] More preferably, the clamping and positioning mechanism is detachably mounted and fixed to the lower module via a lower clamping and positioning plate, the top surface of the lower module has a mounting hole, and the lower clamping and positioning plate is mounted and fixed via a bolt with one end cooperating with the mounting hole.

[0019] The utility model discloses a tooling for measuring the contact resistance of a bipolar plate that can be positioned quickly. The bipolar plate to be tested is clamped and fixed by two detection blocks and an upper clamping and positioning plate and a lower clamping and positioning plate in a clamping and positioning mechanism. The clamping surfaces of the upper clamping and positioning plates and the lower clamping and positioning plates are provided with steps for positioning the bipolar plate in one direction. The steps can be used to position the bipolar plate in one direction, and then the limiting baffle at one end of the limiting plate can limit the bipolar plate in another direction, so as to limit the detection position of the bipolar plate. The position of the limiting plate is adjustable, so that the position of the limiting baffle is adjustable, and the detection position of the bipolar plate is adjustable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the tooling of the utility model.

[0021] Figure 2 It is a side structural schematic diagram of the tooling of the utility model.

[0022] Figure 3 It is a schematic diagram of the structure of the lower half of the tooling of the utility model in conjunction with the bipolar plate.

[0023] Figure 4 It is a structural schematic diagram of the lower half of the tooling of the utility model.

[0024] Figure 5 This is a schematic diagram of the exploded structure of the tooling of the utility model except the upper fixing seat.

[0025] Figure 6 This is a schematic diagram of the exploded structure of the tooling of the utility model excluding the upper fixing seat from another perspective.

[0026] Figure 7 It is a structural schematic diagram of the upper part of the tooling of the utility model.

[0027] Figure 8 This is a schematic diagram of the structure of the tooling of the utility model except the fixing seat and the cooperation of the remaining structures with the bipolar plate.

[0028] Fig. 9 This is a schematic diagram of the structure of the tooling of the utility model except the fixing seat.

[0029] Reference numerals:

[0030] Bipolar plate 1,

[0031] Upper detection block 2, detection hole 21,

[0032] Lower detection block 3, detection hole 31,

[0033] Upper clamping positioning plate 4, avoidance hole 41, avoidance groove 42, positioning hole 43,

[0034] Lower clamping positioning plate 5, avoidance hole 51, step 52, avoidance groove 53, positioning column 54, bolt 55,

[0035] Limiting plate 6, limiting baffle 61, waist-shaped hole 62, bolt 63,

[0036] Upper fixing seat 7, upper receiving groove 71,

[0037] Lower fixing seat 8, lower receiving groove 81,

[0038] Upper module 9, upper mounting slot 91,

[0039] Lower module 10 , lower mounting groove 101 , mounting hole 102 . DETAILED DESCRIPTION

[0040] like Figures 1 to 9 As shown, a tool for measuring the contact resistance of a bipolar plate that can be quickly positioned is used to detect the contact resistance of the bipolar plate 1 of a fuel cell. After the bipolar plate 1 is clamped and positioned by the tool, the entire structure is placed under a press and a certain pressure is applied to simulate the pressure of the bipolar plate 1 under the actual working state, and then the contact resistance is detected using a contact resistance tester.

[0041] like Figure 1 and 2 As shown, the tooling of the present application includes a detection block, a clamping and positioning mechanism and a fixing seat. The detection block includes an upper detection block 2 and a lower detection block 3, and the upper detection block 2 and the lower detection block 3 are used to clamp the bipolar plate 1 to be detected from the upper and lower sides. In a preferred embodiment, as Figures 4 to 9 As shown, the upper detection block 2 and the lower detection block 3 are both cylindrical structures, and are both made of copper with gold-plated surfaces.

[0042] The side surfaces of the upper detection block 2 are provided with detection holes 21 for the probe end of the contact resistance tester to extend into during detection. The side surfaces of the lower detection block 3 are provided with detection holes 31 for the probe end of the contact resistance tester to extend into during detection.

[0043] The clamping and positioning mechanism includes an upper clamping and positioning plate 4 and a lower clamping and positioning plate 5. The upper clamping and positioning plate 4 has an escape hole 41 for escaping the upper detection block 2; the lower clamping and positioning plate 5 has an escape hole 51 for escaping the lower detection block 3. The upper clamping and positioning plate 4 and the lower clamping and positioning plate 5 cooperate with the upper detection block 2 and the lower detection block 3 to clamp and fix the bipolar plate 1 to be detected.

[0044] The clamping surfaces of the upper clamping positioning plate 4 and the lower clamping positioning plate 5 have steps for positioning the bipolar plate 1 in one direction, and the steps can be provided on any one of the upper clamping positioning plate 4 and the lower clamping positioning plate 5. Figures 2 to 4As shown, the lower clamping and positioning plate 5 is provided with a step 52, and the upper clamping and positioning plate 4 is correspondingly recessed, so that the clamping surfaces between the upper clamping and positioning plate 4 and the lower clamping and positioning plate 5 are kept matched. When clamping the bipolar plate 1, one side of the bipolar plate is against the step 52, so that the bipolar plate 52 is positioned in one direction.

[0045] The clamping and positioning mechanism also includes a limit plate 6 arranged on the upper clamping and positioning plate 4 or the lower clamping and positioning plate 5. One end of the limit plate 6 is provided with a limit baffle 61 for positioning the other direction of the bipolar plate 1. During detection, one side of the bipolar plate 1 abuts against the limit baffle 61, thereby limiting the bipolar plate 1. In the embodiment shown in the figure, the limit plate 6 is arranged on the lower surface of the lower clamping and positioning plate 5. Since the bipolar plate 1 is first placed on the lower clamping and positioning plate 5 during assembly, and then the upper clamping and positioning plate 4 and other components located above are placed, it is more convenient for the limit plate 6 to be arranged on the lower clamping and positioning plate 5. Of course, since the upper surface of the lower clamping and positioning plate 5 needs to be used for clamping, it is not convenient to install the limit plate 6. Therefore, the limit plate 6 is preferably arranged on the side or bottom surface of the lower clamping and positioning plate 5. However, since the lower clamping and positioning plate 5 is thin as a whole, it is not easy to fix when it is arranged on the side, so it is best to arrange it on the bottom surface.

[0046] The upper clamping positioning plate 4 and the lower clamping positioning plate 5 are both provided with avoidance grooves on the sides facing away from each other for the probe fixture of the contact resistance tester to pass through during detection, wherein the upper clamping positioning plate 4 has an avoidance groove 42 and the lower clamping positioning plate 5 has an avoidance groove 53.

[0047] A positioning hole 43 and a positioning column 54 are provided between the upper clamping positioning plate 4 and the lower clamping positioning plate 5 for mutual positioning. One of the upper clamping positioning plate 4 and the lower clamping positioning plate 5 is provided with a positioning hole 43, and the other is provided with a positioning column 54. In the embodiment shown in the figure, the positioning hole 43 is provided on the upper clamping positioning plate 4, the positioning column 54 is provided on the lower clamping positioning plate 5, and both the positioning hole 43 and the positioning column 54 are provided on both sides.

[0048] The position of the limit plate 6 is adjustable, so that the position of the limit baffle 61 is adjustable. The limit plate 6 has an axially arranged waist-shaped hole 62, and the limit plate 6 is fixed to one side of the bottom surface of the lower clamping positioning plate 5 by a bolt 63 passing through the waist-shaped hole 62. By loosening and tightening the bolt 63, the length of the limit plate 6 can be adjusted, so that the distance between the limit baffle 61 and the lower clamping positioning plate 5 can be adjusted, so that the detection position on the bipolar plate 1 can be adjusted.

[0049] The fixing seat comprises an upper fixing seat 7 and a lower fixing seat 8 . The upper fixing seat has an upper receiving groove 71 on the bottom surface for mounting the upper detection block 2 , and the lower fixing seat 8 has a lower receiving groove 81 on the top surface for mounting the lower detection block 3 .

[0050] The fixing seat also includes an upper module 9 and a lower module 10. The bottom surface of the upper module 9 has an upper mounting groove 91 for mounting the upper fixing seat 7; the top surface of the lower module 10 has a lower mounting groove 101 for mounting the lower fixing seat 8. The top of the upper fixing seat 7 has an upper mounting plate, which is placed in the upper mounting groove 91 and fixed by bolts; the bottom of the lower fixing seat 8 has a lower mounting plate, which is placed in the lower mounting groove 101 and fixed by bolts.

[0051] The clamping and positioning mechanism is detachably mounted and fixed to the upper module 9 or the lower module 10. In a preferred embodiment, as shown in the structure in the figure, the clamping and positioning mechanism is detachably mounted and fixed to the lower module 10 through the lower clamping and positioning plate 5, the top surface of the lower module 10 has a mounting hole 102, and the lower clamping and positioning plate 5 is mounted and fixed by a bolt 55 with one end matched with the mounting hole 102.

[0052] During the detection, the utility model provides a tooling for measuring the contact resistance of the bipolar plate that can be quickly positioned. The bipolar plate 1 to be detected is clamped and fixed by two detection blocks (upper detection block 2 and lower detection block 3) and the upper clamping positioning plate 4 and the lower clamping positioning plate 5 in the clamping positioning mechanism. The clamping surfaces of the upper clamping positioning plate 4 and the lower clamping positioning plate 5 are provided with a step 52 for positioning one direction of the bipolar plate 1. The step 51 can position the bipolar plate 1 in one direction, and then the other end of the bipolar plate 1 abuts against the limit baffle 61 at one end of the limit plate 6, thereby limiting the other direction of the bipolar plate 1, realizing the limit of the detection position of the bipolar plate 1, and then placing the whole structure under a press machine to give a certain pressure to simulate the pressure of the bipolar plate 1 in the actual working state, and then using a contact resistance tester to detect the contact resistance. After the detection is completed, when it is necessary to adjust the detection position of the bipolar plate 1, the position of the limit baffle 61 is adjusted by loosening the two bolts 63 and adjusting the position of the limit plate 6.

Claims

1. A tool for measuring the contact resistance of bipolar plates that can be quickly positioned, characterized in that: include: A detection block, comprising an upper detection block and a lower detection block, wherein the upper detection block and the lower detection block are used to clamp the bipolar plate to be detected from upper and lower sides; The clamping and positioning mechanism comprises an upper clamping and positioning plate and a lower clamping and positioning plate, wherein the upper clamping and positioning plate and the lower clamping and positioning plate respectively have avoidance holes for avoiding the detection block, and the upper clamping and positioning plate and the lower clamping and positioning plate cooperate with the detection block to clamp and fix the bipolar plate to be detected, and the clamping surfaces of the upper clamping and positioning plate and the lower clamping and positioning plate are provided with steps for positioning the bipolar plate in one direction; the clamping and positioning mechanism also comprises a limit plate provided on the upper clamping and positioning plate or the lower clamping and positioning plate, and one end of the limit plate is provided with a limit baffle for positioning the bipolar plate in another direction, and the position of the limit plate is adjustable so that the position of the limit baffle is adjustable; The fixing seat comprises an upper fixing seat and a lower fixing seat, wherein the bottom surface of the upper fixing seat has an upper receiving groove for installing the upper detection block, and the top surface of the lower fixing seat has a lower receiving groove for installing the lower detection block.

2. The tooling for measuring bipolar plate contact resistance that can be quickly positioned according to claim 1 is characterized in that: The upper detection block and the lower detection block are both cylindrical structures, and both are copper with gold-plated surfaces; The sides of the upper detection block and the lower detection block are both provided with detection holes for the probe ends of the contact resistance tester to extend into during detection.

3. The tooling for measuring bipolar plate contact resistance capable of rapid positioning according to claim 1, characterized in that: The upper clamping and positioning plate and the lower clamping and positioning plate are both provided with avoidance grooves on the sides facing away from each other for the probe fixture of the contact resistance tester to pass through during detection.

4. The tooling for measuring bipolar plate contact resistance capable of rapid positioning according to claim 1, characterized in that: Positioning holes and positioning columns for mutual positioning are provided between the upper clamping positioning plate and the lower clamping positioning plate. The positioning hole is provided on one of the upper clamping positioning plate and the lower clamping positioning plate, and the positioning column is provided on the other.

5. The tooling for measuring bipolar plate contact resistance capable of rapid positioning according to claim 1, characterized in that: The limiting plate is provided with an axially arranged waist-shaped hole, and the limiting plate is fixed to one side of the bottom surface of the lower clamping positioning plate by means of bolts passing through the waist-shaped hole.

6. The tooling for measuring bipolar plate contact resistance capable of rapid positioning according to claim 1, characterized in that: The fixing seat further comprises an upper module and a lower module, the bottom surface of the upper module has an upper mounting groove for mounting the upper fixing seat; the top surface of the lower module has a lower mounting groove for mounting the lower fixing seat; The clamping and positioning mechanism is detachably mounted and fixed to the upper module or the lower module.

7. The tooling for measuring bipolar plate contact resistance capable of rapid positioning according to claim 6, characterized in that: The clamping and positioning mechanism is detachably mounted and fixed to the lower module via a lower clamping and positioning plate. The top surface of the lower module has a mounting hole. The lower clamping and positioning plate is mounted and fixed via a bolt with one end matched with the mounting hole.

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