Fuel cell injection end plate insulation detection device
An insulation testing device with a full-area conductive path and a three-cavity water injection structure designed on the fuel cell injection molded endplate solves the problem that existing technologies cannot fully test the insulation of the injection molded endplate, achieving efficient dry and wet insulation testing and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI H RISE NEW ENERGY TECH CO LTD
- Filing Date
- 2025-07-08
- Publication Date
- 2026-06-19
AI Technical Summary
Existing insulation testing methods can only test the dry insulation of a single injection point on the fuel cell injection endplate, and cannot check the wet insulation, nor can they be effectively tested in high humidity environments.
An insulation testing device for fuel cell injection molded endplate is provided, including a bottom support plate, an insulating container, a load current collector, a clamp mounting bracket, and a comprehensive amperometer. The load current collector covers the entire injection molded mounting surface to form a full-area conductive path. Combined with the injection of deionized water through three ports to simulate a wet environment, the device can detect the insulation resistance in both dry and wet states.
It enables the detection of the insulation resistance of the fuel cell injection molded endplate in both dry and wet states, improving detection efficiency. The device has a simple structure, is easy to install, and has a low cost.
Smart Images
Figure CN224383376U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of fuel cell technology, specifically to a fuel cell injection molded end plate insulation detection device. Background Technology
[0002] A hydrogen fuel cell is an energy conversion device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of water electrolysis. Hydrogen and oxygen are supplied to the anode and cathode, respectively. After hydrogen diffuses outward through the anode and reacts with the electrolyte, it releases electrons and reaches the cathode through an external load. During the reaction, the hydrogen cavity and air cavity of the injection-molded end plate of the hydrogen fuel cell are filled with high-pressure hydrogen and oxygen. Under high pressure, hydrogen and oxygen react through the proton exchange membrane to produce water and generate a large amount of heat. At the same time, coolant or deionized water is introduced into the water cavity for cooling. Thus, during the operation of the fuel cell, the injection-molded surface of the end plate is in complete contact with the load current collector. Moreover, the three-cavity injection-molded part of the end plate is always in a high-humidity environment. Therefore, the dry and wet insulation of the injection-molded end plate of the hydrogen fuel cell is crucial. The insulation of the injection-molded end plate must be guaranteed. However, the existing insulation testing methods can only test the insulation from a single injection point of the injection-molded end plate to the metal part and cannot test the wet insulation. Summary of the Invention
[0003] The purpose of this application is to provide a fuel cell injection molded endplate insulation testing device that can detect the dry and wet insulation of the entire injection molding mounting surface to the metal part, and is easy to operate, easy to install, and low in cost.
[0004] To address the aforementioned technical problems, one embodiment of this application provides a fuel cell injection-molded endplate insulation testing device, comprising: a bottom support plate; an insulating container fixed to the bottom support plate, the insulating container having a slot; a load current collector disposed within the slot for contacting the injection molding mounting surface of the injection-molded endplate to be tested; multiple clamp mounting brackets fixed to the bottom support plate for fixing the injection-molded endplate to be tested, ensuring its injection molding mounting surface is tightly contacted with the load current collector; a comprehensive amperometric meter, its positive terminal connected to the load current collector and its negative terminal connected to the metal portion of the injection-molded endplate to be tested, for detecting the dry-state insulation resistance of the injection-molded endplate to be tested; the injection-molded endplate to be tested has three cavities into which deionized water can be injected to detect the wet-state insulation resistance of the injection-molded endplate to be tested.
[0005] Optionally, the clamp mounting bracket includes a clamp flipping structure for opening and closing the clamp.
[0006] Optionally, the clamp mounting bracket includes an insulating locking pad for enhancing contact pressure during clamping.
[0007] Optionally, the clamp mounting bracket includes an insulating block for isolating metal contact.
[0008] Optionally, the clamp mounting bracket includes an L-shaped reinforcing member to enhance the structural strength of the clamp mounting bracket.
[0009] Optionally, the integrated ampere tester includes a positive clamp and a negative clamp. The positive clamp connects the positive terminal of the integrated ampere tester to the load current collector, and the negative clamp connects the negative terminal of the integrated ampere tester to the metal part of the injection-molded end plate to be tested.
[0010] Optionally, both the positive and negative clamps are alligator clips.
[0011] Optionally, there are four clamp mounting brackets, and the four clamps are arranged diagonally or in a cross-shaped symmetrical layout.
[0012] Optionally, the integrated ampere tester includes a parameter setting module, which is used to set parameters such as test voltage, test time, insulation voltage rise and fall time, and upper and lower limits of insulation requirements.
[0013] Compared to existing technologies, the embodiments of this application feature a load current collector covering the entire injection molding mounting surface, forming a full-area conductive path, which facilitates the detection of dry-state insulation resistance of the injection molding end plate. A three-chamber water injection design injects deionized water into the end plate cavity to simulate a humid environment, and the end plate insulation container prevents liquid leakage from interfering with the detection, facilitating the detection of wet-state insulation resistance of the injection molding end plate. The detection device of this application embodiment can detect both dry and wet insulation, improving detection efficiency. Furthermore, the device has a simple structure, is easy to install and operate, and is low in cost. Attached Figure Description
[0014] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0015] Figure 1 This is a schematic diagram of a fuel cell injection molded endplate insulation detection device according to an embodiment of this application;
[0016] Figure 2 This is a schematic diagram of an insulation detection device for a fuel cell injection molded end plate according to another embodiment of this application.
[0017] Figure label:
[0018] 1-Bottom support plate; 2-Insulated container box; 3-Load current collector; 4-Clamp mounting bracket; 5-Comprehensive amperometer; 10-Injection molded end plate to be tested; 101-Injection part; 102-Metal part; 103-Three-cavity port; 41-Clamp flipping structure; 42-Insulated locking gasket; 43-Insulating block; 44-L-Reinforcing member. Detailed Implementation
[0019] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0020] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.
[0021] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0022] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.
[0023] One embodiment of this application provides a fuel cell injection molded endplate insulation detection device, referencing... Figure 1 and Figure 2The device includes: a bottom support plate 1; an insulating container 2 fixed on the bottom support plate 1, the insulating container 2 having a slot; a load current collector 3 disposed in the slot of the insulating container 2, for fitting with the injection molding mounting surface of the injection molded end plate 10 to be tested, the injection molding mounting surface being the bottom surface of the injection molding part 101 of the injection molded end plate 10 to be tested; the load current collector 3 covers the entire injection molding mounting surface, forming a full-area conductive path, facilitating the detection of the dry state insulation resistance of the injection molded end plate 10. Multiple clamp mounting brackets 4 are fixed to the bottom support plate 1 to fix the injection molded end plate 10 to be tested, so that its injection molding mounting surface is in close contact with the load current collector 3; a comprehensive amperometric tester 5 is connected to the load current collector 3 with its positive terminal connected to the metal part 102 of the injection molded end plate 10 to be tested, and is used to detect the dry insulation resistance of the injection molded end plate 10 to be tested; the injection molded end plate 10 to be tested has a three-chamber port 103, and deionized water can be injected into the three-chamber port 103 to simulate the high humidity environment during actual operation of the fuel cell, so as to detect the wet insulation resistance of the injection molded end plate 10 to be tested.
[0024] Optionally, the clamp mounting bracket 4 includes: a clamp flipping structure 41, an insulating locking pad 42, an insulating block 43, and an L-shaped reinforcing member 44.
[0025] The clamp flipping structure 41 can achieve rapid flipping from 0 to 90° via a hinge or pivot design (see attached). Figure 2 (Middle clamp open / closed state), significantly shortening clamping time. When the clamp flipping structure 41 flips up, the clamp opens, facilitating the placement of the injection-molded end plate 10 to be tested into the insulating container 2. When the clamp flipping structure 41 flips down, it clamps and fixes the injection-molded end plate 10 to be tested, ensuring that the injection-molded mounting surface of the end plate 10 is tightly fitted with the load current collector 3 located in the slot of the end plate insulating container 2. The clamp flipping structure 41 allows for convenient opening and closing of the clamp. The clamp flipping structure 41 can have a built-in spring or torque limiter to prevent excessive clamping force from damaging the injection-molded end plate 10 to be tested.
[0026] The insulating locking pad 42 can be set at the locking part of the clamp. When clamping, it increases the contact pressure through elastic deformation, which not only ensures a secure fixation, but also avoids direct metal-to-metal contact.
[0027] The insulating block 43 can be placed under the insulating locking pad 42. The overall insulation of the insulating block 43 and the surface insulation of the pad form a double insulation protection, which is used to isolate metal contact and prevent mechanical wear from causing insulation failure.
[0028] The L-shaped reinforcing member 44 can be used as a connector. One side can be fixedly connected to the clamp flipping structure 41 by bolts, and the other side can be vertically fixed to the side of the bottom support plate 1 by bolts, providing a support base for the clamp mounting bracket 4 and enhancing the structural strength of the clamp mounting bracket 4.
[0029] Preferably, the integrated ampere meter 5 includes a positive clamp and a negative clamp. The positive clamp connects the positive terminal of the integrated ampere meter 5 to the load current collector 3, and the negative clamp connects the negative terminal of the integrated ampere meter 5 to the metal part 102 of the injection molded end plate 10 to be tested. More preferably, both the positive and negative clamps are alligator clips. The spring structure of the alligator clips allows for one-handed operation, quickly clamping the load current collector 3 or the metal part 102 of the injection molded end plate 10 to be tested without tools, significantly improving testing efficiency (clamping time < 5 seconds). Furthermore, alligator clips are inexpensive, and if the clamping jaws are worn or contaminated, they can be quickly replaced without affecting the main structure of the tooling.
[0030] Preferably, there are four clamp mounting brackets 4, as shown in the reference. Figure 2 The four clamps are arranged diagonally or symmetrically in a cross shape. This ensures that the injection-molded end plate 10 under test is subjected to uniform pressure when clamped, so that the injection-molded mounting surface and the load current collector 3 are tightly fitted without gaps throughout the entire area, avoiding local stress concentration that could lead to deformation and fluctuations in the insulation resistance test value.
[0031] Optionally, the integrated ampere tester of this application includes a parameter setting module, which can be used to set the test voltage, test time, insulation voltage rise and fall time, and upper and lower limits of insulation requirements. The parameters in this application can be set according to the insulation testing requirements of the injection-molded end plate 10 to be tested.
[0032] In one application scenario, when using the insulation testing device of this embodiment to perform insulation testing on the injection-molded end plate 10 of a fuel cell, the clamps of the multiple clamp mounting brackets 4 can be fully opened first, and the load current collector 3 can be placed into the slot of the end plate insulation holding box 2; then, after installing the inner sealing ring, the injection-molded end plate 10 to be tested is placed on the load current collector 3 with its horizontal edges aligned; the multiple clamp mounting brackets 4 are clamped in sequence to fix the injection-molded end plate 10 to be tested, so that its injection-molded mounting surface is tightly attached to the load current collector 3 below; then, the positive alligator clip of the integrated ampere meter 5 is clamped onto the load current collector 3, and the negative alligator clip is clamped onto the injection-molded end plate 10 to be tested. The metal part 102 of the end plate 10; using the insulation testing function of the integrated amperometric tester 5, set the insulation test voltage, test time, insulation voltage rise and fall time, upper and lower limits of insulation requirements, and other parameters according to the insulation testing requirements of the injection molded end plate 10 to be tested; press the measurement start button of the integrated amperometric tester 5; after the test, the resistance value shown by the integrated amperometric tester 5 is the dry state insulation resistance value of the injection molded end plate 10 to be tested for the fuel cell; then fill the three-chamber port 103 of the injection molded end plate 10 to be tested with deionized water, and press the measurement start button of the integrated amperometric tester 5 again, and the measured resistance is the wet state insulation resistance of the injection molded end plate 10 to be tested for the fuel cell.
[0033] Compared to existing technologies, the embodiment of this application features a load current collector 3 covering the entire injection molding mounting surface, forming a full-area conductive path, which facilitates the detection of the dry-state insulation resistance of the injection molding end plate 10. A three-cavity water injection design directly injects deionized water into the cavity of the injection molding end plate 10 to simulate a humid environment. The end plate insulation container 2 prevents liquid leakage from interfering with the detection, facilitating the detection of the wet-state insulation resistance of the injection molding end plate 10. The injection molding end plate insulation detection device of this embodiment can detect both the dry-state and wet-state insulation resistance of the injection molding end plate, improving detection efficiency. Furthermore, the device has a simple structure, is easy to install and operate, and has a low cost.
[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0035] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
[0036] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.
Claims
1. A fuel cell injection end plate insulation detection device, characterized by, include: Bottom support plate; An insulating container is fixed to the bottom support plate, and the insulating container has a slot. A load collector plate is disposed in the slot and is used to fit against the injection mounting surface of the injection molded end plate to be tested; Multiple clamp mounting brackets are fixed to the bottom support plate to fix the injection molded end plate to be tested, so that its injection molded mounting surface is in close contact with the load collector plate; The integrated amperometric tester has its positive terminal connected to the load current collector and its negative terminal connected to the metal part of the injection molded end plate to be tested, and is used to detect the dry-state insulation resistance of the injection molded end plate to be tested. The injection-molded end plate under test has three cavities, into which deionized water can be injected to detect the wet insulation resistance of the injection-molded end plate under test.
2. The fuel cell injection end plate insulation detection apparatus according to claim 1, characterized by The clamp mounting bracket includes: The clamp flipping structure is used to open and close the clamp.
3. The fuel cell injection end plate insulation detection apparatus of claim 1, wherein The clamp mounting bracket includes: An insulating locking pad is used to enhance the contact pressure when the clamp mounting bracket is clamped.
4. The fuel cell injection end plate insulation detection apparatus of claim 1, wherein The clamp mounting bracket includes an insulating block for isolating metal contact.
5. The fuel cell injection-molded endplate insulation testing device according to claim 1, characterized in that, The clamp mounting bracket includes: an L-shaped reinforcing member, used to enhance the structural strength of the clamp mounting bracket.
6. The fuel cell injection molded endplate insulation detection device according to claim 1, characterized in that, The integrated ampere tester includes a positive clamp and a negative clamp. The positive clamp connects the positive terminal of the integrated ampere tester to the load current collector, and the negative clamp connects the negative terminal of the integrated ampere tester to the metal part of the injection molded end plate to be tested.
7. The fuel cell injection end plate insulation detection apparatus of claim 6, wherein Both the positive and negative clamps are alligator clips.
8. The fuel cell injection end plate insulation detection apparatus of claim 1, wherein The clamp mounting bracket consists of four clamps, which are arranged diagonally or in a cross-shaped symmetrical layout.
9. The fuel cell injection end plate insulation detection apparatus of claim 1, wherein The integrated ampere tester includes a parameter setting module, which is used to set parameters such as test voltage, test time, insulation voltage rise and fall time, and upper and lower limits of insulation requirements.