Voltage inspection structure, bipolar plate and hydrogen fuel cell

Abstract

The invention discloses a voltage inspection structure, a bipolar plate and a hydrogen fuel cell, and relates to the technical field of hydrogen fuel cells. The voltage inspection structure comprises a body, the body is in a long sheet shape and extends in the first direction, the first end of the body in the first direction is provided with a signal output part which can extend out of the bipolar plate, and the second end, away from the first end, of the body is provided with at least three limiting parts at intervals. The at least three limiting parts and the first direction have the same or different preset included angles, so that the limiting parts and the second end of the body can be limited to the mounting structure of the bipolar plate. The problems that in the prior art, deviation and loosening are prone to occurring when a voltage inspection structure is installed between a cathode plate and an anode plate of a bipolar plate between single cells, the accuracy of a detection result is affected, potential safety hazards are brought, and the operation and maintenance cost is increased are solved.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen fuel cells, and in particular to a voltage inspection structure, a bipolar plate and a hydrogen fuel cell. Background Art

[0002] As the global demand for clean energy continues to grow, hydrogen fuel cells have broad application prospects as an efficient and environmentally friendly power source. In hydrogen fuel cells, multiple single-chip cells are usually connected in series to achieve the required voltage and power output.

[0003] In order to ensure the performance and safety of hydrogen fuel cells, it is necessary to monitor the working status of the single-chip battery in real time. Usually, a voltage inspection structure is set between the cathode plate and the anode plate of the bipolar plate between the single-chip batteries to detect the voltage. However, in the prior art, the installation of the voltage inspection structure between the cathode plate and the anode plate of the bipolar plate between the single-chip batteries is prone to displacement and loosening, which affects the accuracy of the detection results, brings safety hazards, and increases the operation and maintenance costs.

[0004] Therefore, the above problems need to be solved urgently. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a voltage inspection structure, a bipolar plate and a hydrogen fuel cell to solve the problem in the prior art that the voltage inspection structure is easily displaced and loosened during installation between the cathode plate and the anode plate of the bipolar plate between monolithic batteries, thus affecting the accuracy of the detection results, bringing safety hazards and increasing operation and maintenance costs.

[0006] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0007] The first aspect of the present application provides a voltage inspection structure, including:

[0008] The main body is in the shape of a long sheet and extends along a first direction. A signal output portion is provided at the first end of the main body in the first direction and the signal output portion can extend out of the bipolar plate. At least three limiting portions are provided at intervals at the second end of the main body away from the first end. At least three limiting portions have the same or different preset angles with the first direction so that the limiting portion and the second end of the main body can be limited to the mounting structure of the bipolar plate.

[0009] In some embodiments, in the aforementioned voltage inspection structure, there are four limit portions, which are symmetrically arranged in pairs on both sides of the second end of the body in a second direction perpendicular to the first direction.

[0010] In some embodiments, the aforementioned voltage inspection structure has three limiting parts, two of which are symmetrically arranged on both sides of the second end in a second direction perpendicular to the first direction, and the other limiting part is arranged on one side of the second end in the second direction and is spaced apart from the limiting part on the corresponding side.

[0011] In some embodiments, the aforementioned voltage inspection structure has three limiting parts, which are alternately arranged along the first direction on both sides of the second end in a second direction perpendicular to the first direction, and the three limiting parts are spaced the same between two adjacent connection points of the three connection points of the second end.

[0012] In some embodiments, in the aforementioned voltage inspection structure, the limiting portion is in the shape of a long sheet, and the limiting portion extends along a second direction perpendicular to the first direction, or is inclined toward the first end of the body relative to the second direction.

[0013] In some embodiments, in the aforementioned voltage inspection structure, an arc-shaped transition surface is provided at the end of the limiting portion away from the second end.

[0014] In some embodiments, in the aforementioned voltage inspection structure, the limiting portion is provided with at least one first through hole along the thickness direction of the main body, and the second end of the main body is provided with at least one second through hole along the thickness direction, and the first through hole and the second through hole are used to prevent glue overflow between the limiting portion and the second end of the main body and the mounting structure of the bipolar plate.

[0015] In some embodiments, in the aforementioned voltage inspection structure, the limiting portion, the signal output portion and the body are integrally formed.

[0016] A second aspect of the present application provides a bipolar plate, comprising a mounting structure and the above-mentioned voltage inspection structure; the limiting portion of the voltage inspection structure and the second end of the body are limited to the mounting structure.

[0017] A third aspect of the present application provides a hydrogen fuel cell, comprising the above-mentioned bipolar plate.

[0018] Through the above technical solution, a voltage inspection structure, a bipolar plate and a hydrogen fuel cell provided by the present application have at least the following advantages:

[0019] The first aspect of the present application provides a voltage inspection structure, including a body, the body is in the shape of a long sheet and extends along a first direction, a signal output portion is arranged at a first end of the body in the first direction and the signal output portion can extend out of the bipolar plate, and at least three limiting portions are arranged at intervals at a second end of the body away from the first end, and at least three limiting portions have the same or different preset angles with the first direction so that the limiting portion and the second end of the body can be limited to the mounting structure of the bipolar plate. The present application provides at least three limiting portions at the second end of the body, so that the at least three limiting portions provide sufficient contact area with the bipolar plate mounting structure, and at the same time, by setting at least three limiting portions to have the same or different preset angles with the first direction, the connection between the limiting portion and the mounting structure is constrained by the preset angle, thereby improving the stability of the limiting portion and the second end being limited in the mounting structure, avoiding the occurrence of offset loosening, thereby ensuring the accuracy of voltage detection results and monitoring the working state of the single cell in the hydrogen fuel cell, improving the safety of the operation of the hydrogen fuel cell, and reducing the operation and maintenance costs. Through the application of the present application, the problem in the prior art that the voltage inspection structure is easily offset and loosened during installation between the cathode plate and the anode plate of the bipolar plate between the monolithic batteries is solved, which affects the accuracy of the detection results, brings safety hazards, and increases the operation and maintenance costs.

[0020] The bipolar plate provided in the second aspect of the present application and the hydrogen fuel cell provided in the third aspect have the same or similar technical effects as the voltage inspection structure provided in the first aspect of the present application.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 The schematic diagram of the structure of the first voltage inspection structure provided in the embodiment of the present application is shown schematically;

[0024] Figure 2 The schematic diagram of the structure of the second voltage inspection structure provided in the embodiment of the present application is shown schematically;

[0025] Figure 3 The schematic diagram of the structure of the third voltage inspection structure provided in the embodiment of the present application is shown schematically;

[0026] Figure 4 The schematic diagram of the structure of the fourth voltage inspection structure provided in the embodiment of the present application is shown schematically;

[0027] Figure 5 A schematic diagram of an exploded structure of a bipolar plate provided in an embodiment of the present application is shown schematically;

[0028] Figure 6 A schematic diagram of a partial explosion structure of a bipolar plate provided in an embodiment of the present application is shown schematically.

[0029] Description of reference numerals:

[0030] 1. bipolar plate; 11. mounting structure; 12. voltage inspection structure; 121. body; 122. first end; 123. second end; 124. signal output part; 125. limit part; 1231. second through hole; 1251. arc-shaped transition surface; 1252. first through hole;

[0031] A, first direction; B, second direction; R, preset angle. DETAILED DESCRIPTION

[0032] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0033] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specified, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as merely exemplary, rather than as limiting.

[0034] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply 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 of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0035] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0036] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a component connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific situation. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0037] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0038] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0039] Embodiment 1

[0040] like Figure 1 , Figure 5 and Figure 6 As shown, the first aspect of the present application provides a voltage inspection structure 12, including a main body 121, the main body 121 is in the shape of a long sheet and extends along a first direction A, a first end 122 of the main body 121 in the first direction A is provided with a signal output portion 124 and the signal output portion 124 can extend out of the bipolar plate 1, and a second end 123 of the main body 121 away from the first end 122 is provided with at least three limiting portions 125 at intervals, and at least three limiting portions 125 have the same or different preset angles R with the first direction A so that the limiting portion 125 and the second end 123 of the main body 121 can be limited to the mounting structure 11 of the bipolar plate 1.

[0041] Specifically, the present application provides a voltage inspection structure 12, including a main body 121, which is in the shape of a long sheet so that the gap or groove between the anode plate and the cathode plate in the bipolar plate 1 can be used to form a mounting structure 11 for installation and connection. At the same time, the long sheet-shaped main body 121 can occupy a smaller space while realizing voltage detection, saving the layout cost required for the hydrogen fuel cell to realize real-time voltage detection, and the long sheet-shaped main body 121 is convenient for mass production.

[0042] The first end 122 of the body 121 in the first direction A is provided with a signal output part 124, and the signal output part 124 can extend out of the bipolar plate 1, so as to obtain the voltage value of the single cell through the voltage difference between the voltage inspection structures 12 provided in the bipolar plates 1 on both sides of the single cell of the hydrogen fuel cell, and the signal output part 124 extends out of the bipolar plate 1 so as to be connected to the voltage test structure, and the signal output part 124 can be a cable connector, a conductive electric shock or a conductive probe, etc., connected to a data acquisition card, a wiring harness integrated connector, etc. outside the bipolar plate 1, to achieve signal transmission and voltage detection. In the present application, the signal output part 124 is located at the first end 122 of the body 121, and can be a square sheet integrally formed with the body 121, and grooves can be provided on both sides of the square sheet output part for accommodating and connecting cables or wiring harnesses, without specific limitation.

[0043] In the present application, at least three limiting portions 125 are arranged at intervals at the second end 123 of the body 121 away from the first end 122, so that the at least three limiting portions 125 provide sufficient contact area with the mounting structure 11 of the bipolar plate 1. The second end 123 of the body 121 is usually arranged at the edge end side of the bipolar plate 1. In order to improve space utilization, increase the contact area between the limiting portion 125 and the mounting structure 11 of the bipolar plate 1 in a limited space, and improve the structural strength and installation stability through the limiting connection. The limiting portions 125 can be partially symmetrically arranged on both sides of the second end 123 of the body 121. For example, three limiting portions 125 can be arranged in the present application, wherein two limiting portions 125 are symmetrically arranged on both sides of the second end 123, and another limiting portion 125 is arranged at intervals of the limiting portion 125 on either side; four limiting portions 125 can also be arranged so that The four limiting parts 125 are symmetrically arranged on both sides of the second end 123 in pairs, and multi-directional positioning is provided by the four limiting parts 125, and the stress is evenly distributed when subjected to vibration or impact, thereby improving the overall strength of the structure; five limiting parts 125 can also be set, four of the five limiting parts 125 are symmetrical in pairs, and another limiting part 125 is arranged at intervals from the limiting parts 125 on either side; six limiting parts 125 can also be set, and the six limiting parts 125 are symmetrically arranged on both sides of the second end 123 so that there are three limiting parts 125 on either side of the second end 123. The above examples are only some embodiments of the number and position settings of the limiting parts 125 of the present application, which can be adjusted according to actual needs to ensure the stability of the limiting parts 125 and the second end 123 being limited in the mounting structure 11 to avoid the occurrence of offset loosening.

[0044] The present application provides at least three limiting portions 125 having the same or different preset angles R with the first direction A so that the limiting portion 125 and the second end 123 of the main body 121 can be limited to the mounting structure 11 of the bipolar plate 1. The preset angle R constrains the connection between the limiting portion 125 and the mounting structure 11, thereby improving the stability of the limiting portion 125 and the second end 123 being limited in the mounting structure 11. In one embodiment, the limiting portions 125 provided in the present application extend in a direction perpendicular to the first direction A, so that the matching connection between the limiting portions 125 and the mounting structure 11 has a preset angle R of 90° to achieve limiting constraint; in one embodiment, the limiting portions 125 provided in the present application are inclined toward the first end 122 of the main body 121 relative to the direction perpendicular to the first direction A, so that the preset angle R is an acute angle, such as the preset angle R is 60°, 70°, 80°, etc., and the specific details are not limited. The preset angle R at an acute angle can form a limiting constraint between the limiting portion 125 and the mounting structure 11. The limiting portion 125 is inclined so that the barb of the limiting portion 125 can achieve stable limiting installation in the mounting structure 11, and when the limiting portion 125 can be symmetrically arranged relative to the second end 123, the preset angle R at an acute angle The two symmetrical limiting parts 125 are hinged to form a V-shaped structure on the main body 121, and the V-shaped structure is connected in the mounting structure 11, which is not easy to deviate and loosen; in another embodiment, the limiting part 125 provided in the present application partially extends in a direction perpendicular to the first direction A, and partially tilts toward the first end 122 of the main body 121 relative to the direction perpendicular to the first direction A. The above examples are only some embodiments of the present application in which the limiting part 125 has the same or different preset angle R with the first direction A, and there is no specific limitation. The limiting part 125 can be stably limited and installed in the mounting structure 11 to avoid the occurrence of deviation and looseness, thereby ensuring the accuracy of voltage detection results and monitoring the working status of single-chip batteries in hydrogen fuel cells, improving the safety of hydrogen fuel cell operation, and reducing operation and maintenance costs.

[0045] In a first aspect of the present application, a voltage inspection structure 12 is provided, comprising a main body 121, the main body 121 is in the shape of a long sheet and extends along a first direction A, a first end 122 of the main body 121 in the first direction A is provided with a signal output portion 124 and the signal output portion 124 can extend out of the bipolar plate 1, and a second end 123 of the main body 121 away from the first end 122 is provided with at least three limiting portions 125 at intervals, and at least three limiting portions 125 have the same or different preset angles R with the first direction A so that the limiting portion 125 and the second end 123 of the main body 121 can be limited to the mounting structure 11 of the bipolar plate 1. The present application sets at least three limiting parts 125 at the second end 123 of the body 121, so that the at least three limiting parts 125 provide sufficient contact area with the bipolar plate 1 mounting structure 11. At the same time, by setting at least three limiting parts 125 with the same or different preset angles R with the first direction A, the connection between the limiting part 125 and the mounting structure 11 is constrained by the preset angle R, thereby improving the stability of the limiting part 125 and the second end 123 being limited in the mounting structure 11, avoiding the occurrence of offset looseness, thereby ensuring the accuracy of voltage detection results and monitoring the working status of single-chip cells in hydrogen fuel cells, improving the safety of hydrogen fuel cell operation, and reducing operation and maintenance costs. Through the application of the present application, the problem of the prior art that the voltage inspection structure 12 is easily offset and loosened when installed between the cathode plate and the anode plate of the bipolar plate 1 between single-chip cells, affecting the accuracy of the detection results, bringing safety hazards, and increasing operation and maintenance costs is solved.

[0046] like Figure 1 As shown, in some embodiments, there are four limiting portions 125 and they are symmetrically arranged in pairs on both sides of the second end 123 of the body 121 in the second direction B perpendicular to the first direction A.

[0047] Specifically, in one embodiment of the present application, four limiting portions 125 are provided, and the four limiting portions 125 are symmetrically arranged in pairs at the second end 123 of the main body 121, and are located on both sides of the second end 123 in a second direction B perpendicular to the first direction A, so that the contact area with the mounting structure 11 of the bipolar plate 1 is further increased through the arrangement of the four limiting portions 125, and the stability and reliability after connection are improved, and it is not easy to loosen and shift; and the four symmetrically arranged limiting portions 125 can evenly distribute stress when the voltage inspection structure 12 is subjected to vibration or impact, thereby improving the impact resistance of the entire structure, resisting torques in different directions, and improving the overall strength of the structure; and the four symmetrically arranged limiting portions 125 can provide positioning in multiple directions during the connection process between the voltage inspection structure 12 and the mounting structure 11 of the bipolar plate 1, and the symmetrical arrangement can reduce the offset and dislocation during the connection process, which is convenient for operators to perform installation operations.

[0048] like Figure 2As shown, in some embodiments, there are three limiting portions 125, wherein two limiting portions 125 are symmetrically arranged on both sides of the second end 123 in a second direction B perpendicular to the first direction A, and another limiting portion 125 is arranged on one side of the second end 123 in the second direction B and is spaced apart from the limiting portion 125 on the corresponding side.

[0049] Specifically, in one embodiment of the present application, three limiting parts 125 are provided, wherein two limiting parts 125 are symmetrically arranged on both sides of the second end 123 in the second direction B perpendicular to the first direction A, and another limiting part 125 is arranged on one side of the second end 123 in the second direction B and is spaced from the limiting part 125 on the corresponding side. By combining the two symmetrically arranged limiting parts 125 with the asymmetrically arranged limiting part 125, the three limiting parts 125 provide sufficient contact area with the bipolar plate 1 mounting structure 11, thereby improving the stability of the limiting part 125 and the second end 123 being limited in the mounting structure 11 under the constraint of the preset angle R. Moreover, the three limiting parts 125 combined with symmetry and asymmetry can provide guidance for the connection between them and the bipolar plate 1 mounting structure 11 through the two symmetrically arranged limiting parts 125, which is convenient for assembly positioning. At the same time, the asymmetrically arranged limiting parts 125 enable the voltage inspection structure 12 to have a foolproof function, thereby ensuring the correct installation direction and improving the assembly accuracy.

[0050] like Figure 3 As shown, in some embodiments, there are three limiting portions 125, and the three limiting portions 125 are alternately arranged along the first direction A on both sides of the second end 123 in the second direction B perpendicular to the first direction A, and the three limiting portions 125 are spaced the same between two adjacent connection points of the three connection points of the second end 123.

[0051] Specifically, in another embodiment of the present application, there are also three limit portions 125, and the three limit portions 125 are alternately arranged along the first direction A on both sides of the second end 123 in the second direction B perpendicular to the first direction A. In one embodiment, the left side of the second end 123 of the body 121 has two spaced limit portions 125, and the right side of the second end 123 has one limit portion 125; in another embodiment, the left side of the second end 123 of the body 121 has one limit portion 125, and the right side of the second end 123 has two spaced limit portions 125. The present application provides sufficient contact area with the bipolar plate 1 mounting structure 11 through the three alternately arranged limit portions 125, and at the same time, the alternately arranged limit portions 125 make the voltage inspection structure 12 have a foolproof function, ensuring the correct installation direction. After the three alternately arranged limit parts 125 are limited by the mounting structure 11, each limit part 125 is limited at a different position, and is not prone to deflection and loosening, thereby ensuring the accuracy of voltage detection results and monitoring the working status of single-chip batteries in the hydrogen fuel cell, improving the safety of hydrogen fuel cell operation, and reducing operation and maintenance costs.

[0052] The present application also sets three limiting portions 125 with the same spacing between two adjacent connection points among the three connection points of the second end 123, so that the three limiting portions 125 are evenly spaced and alternately arranged in the first direction A, so that the voltage inspection structure 12 has better symmetry, which is convenient for maintaining the stability of the connection with the mounting structure 11 and facilitating the manufacturing process.

[0053] like Figures 1 to 4 As shown, in some embodiments, the limiting portion 125 is in the shape of a long sheet, and the limiting portion 125 extends along a second direction B perpendicular to the first direction A, or is inclined relative to the second direction B toward the first end 122 of the body 121.

[0054] Specifically, in order to enable the limiting portion 125 to increase the contact area with the bipolar plate 1 mounting structure 11, the present application arranges the limiting portion 125 to be in the shape of a long sheet. The long sheet-shaped limiting portion 125 can be arranged perpendicular to the long sheet-shaped main body 121, or can have a certain inclination angle with the first direction A of the length of the main body 121, and be inclined toward the first end 122 of the main body 121 relative to the second direction B.

[0055] When the limiting portion 125 extends along the second direction B perpendicular to the first direction A, the preset angle R is 90°, so that the mating connection between the limiting portion 125 and the mounting structure 11 has a preset angle R of 90° to achieve limiting constraint, and the limiting portion 125 extends along the second direction B perpendicular to the first direction A, which is convenient for production and processing, and reduces the manufacturing cost of the voltage inspection structure 12.

[0056] When the limiting portion 125 is inclined relative to the second direction B toward the first end 122 of the body 121, the preset angle R is an acute angle, such as 60°, 70°, 80°, etc., with no specific limitation. Usually, the voltage inspection structure 12 is arranged on the edge end side of the bipolar plate 1. When the limiting portion 125 and the second end 123 of the body 121 are limited to the mounting structure 11 of the bipolar plate 1, the acute preset angle R can form a limiting constraint between the limiting portion 125 and the mounting structure 11. The limiting portion 125 is inclined relative to the second direction B toward the first end 122 of the body 121 so that the limiting portion 125 is hooked in the mounting structure 11 to achieve stable limiting installation, avoiding the occurrence of offset loosening, thereby ensuring the accuracy of the voltage detection results and the monitoring of the working state of the single-chip battery in the hydrogen fuel cell, improving the safety of the operation of the hydrogen fuel cell, and reducing the operation and maintenance costs.

[0057] like Figure 1 As shown, in some embodiments, an arc-shaped transition surface 1251 is provided at the end of the limiting portion 125 away from the second end 123 .

[0058] Specifically, in order to reduce stress concentration and improve assembly accuracy during the process in which the limiting portion 125 of the voltage inspection structure 12 is limited to the mounting structure 11, the present application provides an arc-shaped transition surface 1251 at the end of the limiting portion 125 away from the second end 123. The setting of the arc-shaped transition surface 1251 enables the limiting portion 125 to effectively disperse the force at the contact position when cooperating with the mounting structure 11, reduce stress concentration, and thus improve the durability and stability of the overall structure after the limiting portion 125 is assembled in the bipolar plate 1. In addition, the setting of the arc-shaped transition surface 1251 makes it easier to locate and install the limiting portion 125 in the mounting structure 11, which is convenient for operators to accurately locate and install, and at the same time provides sufficient buffer transition to avoid damage caused by collision, ensuring the high-quality assembly of the limiting portion 125 and the voltage inspection structure 12 in the bipolar plate 1, thereby avoiding the occurrence of offset loosening, ensuring the accuracy of the voltage detection results and the monitoring of the working state of the single-chip battery in the hydrogen fuel cell, improving the safety of the operation of the hydrogen fuel cell, and reducing the operation and maintenance costs.

[0059] like Figure 1 As shown, in some embodiments, the limiting portion 125 is provided with at least one first through hole 1252 along the thickness direction of the main body 121, and the second end 123 of the main body 121 is provided with at least one second through hole 1231 along the thickness direction, and the first through hole 1252 and the second through hole 1231 are used for glue overflow between the limiting portion 125 and the second end 123 of the main body 121 and the mounting structure 11 of the bipolar plate 1.

[0060] Specifically, in order to improve the stability of the limiting portion 125 and the second end 123 being limited in the mounting structure 11, the present application can use silver-based, copper-based, nickel-based or other conductive adhesives to glue the limiting portion 125 and the second end 123 of the main body 121 to the mounting structure 11, so as to achieve a stable connection while enabling good electrical conductivity between the mounting structure 11 and the voltage inspection structure 12 of the cathode plate and the anode plate of the bipolar plate 1.

[0061] In order to allow the conductive glue to fully fill the space between the voltage inspection structure 12 and the mounting structure 11, the present application provides at least one first through hole 1252 in the limiting portion 125 along the thickness direction of the body 121, and at least one second through hole 1231 in the thickness direction of the second end 123 of the body 121. The first through hole 1252 and the second through hole 1231 provide multiple flow channels as overflow holes so that the conductive glue can flow and fill into the hole and between the voltage inspection structure 12 and the mounting structure 11 during the assembly process, and the outer edges of the first through hole 1252 and the second through hole 1231 form additional fixed points with the mounting structure 11 after the conductive glue is cured, thereby improving the connection strength between the voltage inspection structure 12 and the mounting structure 11, thereby avoiding the occurrence of offset loosening, ensuring the accuracy of the voltage detection results and the monitoring of the working status of the single-chip battery in the hydrogen fuel cell, improving the safety of the operation of the hydrogen fuel cell, and reducing the operation and maintenance cost. The number of the first through hole 1252 and the second through hole 1231 is adaptively adjusted according to the actual overflow effect required, and there is no specific limit.

[0062] In some embodiments, the limiting portion 125 , the signal output portion 124 and the body 121 are integrally formed.

[0063] Specifically, in order to enhance the structural strength of the voltage inspection structure 12 and ensure the stability and reliability during the voltage detection process, the present application sets a limit part 125 and a signal output part 124 to be integrally formed with the main body 121. The limit part 125 and the signal output part 124 can be in the form of long sheets together with the main body 121, and in order to ensure the conductive performance, they can be made of copper or stainless steel. They can be integrally formed by stamping, die-casting, etc., or they can be welded together by laser welding or electron beam welding. There is no specific limit as long as the overall structural strength of the voltage inspection structure 12 can be guaranteed.

[0064] Embodiment 2

[0065] like Figure 5 and Figure 6 As shown, the second aspect of the present application provides a bipolar plate 1, including a mounting structure 11 and a voltage inspection structure 12; the limiting portion 125 of the voltage inspection structure 12 and the second end 123 of the body 121 are limited to the mounting structure 11.

[0066] Specifically, please refer to the first embodiment for the specific structure of the voltage inspection structure 12, which will not be described in detail here.

[0067] Specifically, the mounting structure 11 can be formed by opening half grooves on the sides of the cathode plate and the anode plate of the bipolar plate 1 that are close to each other, so that the limiting portion 125 of the voltage inspection structure 12 and the second end 123 of the main body 121 are limitedly connected through the two half grooves to form a whole groove; the groove can also be set separately on the side of the anode plate facing the cathode plate, or on the side of the cathode plate facing the anode plate, without specific restrictions, and it should be noted that the signal output part 124 is extended out of the bipolar plate 1 to facilitate the connection of the wiring harness integrated connector to realize integrated voltage detection.

[0068] The second aspect of the present application provides a bipolar plate 1, comprising a mounting structure 11 and a voltage inspection structure 12; a limiting portion 125 of the voltage inspection structure 12 and a second end 123 of a body 121 are limited to the mounting structure 11. The voltage inspection structure 12 comprises a body 121, the body 121 is in the shape of a long sheet and extends along a first direction A, a first end 122 of the body 121 in the first direction A is provided with a signal output portion 124 and the signal output portion 124 can extend out of the bipolar plate 1, and a second end 123 of the body 121 away from the first end 122 is provided with at least three limiting portions 125 at intervals, and at least three limiting portions 125 have the same or different preset angles R with the first direction A so that the limiting portion 125 and the second end 123 of the body 121 can be limited to the mounting structure 11 of the bipolar plate 1. The present application sets at least three limiting parts 125 at the second end 123 of the body 121, so that the at least three limiting parts 125 provide sufficient contact area with the bipolar plate 1 mounting structure 11. At the same time, by setting at least three limiting parts 125 with the same or different preset angles R with the first direction A, the connection between the limiting part 125 and the mounting structure 11 is constrained by the preset angle R, thereby improving the stability of the limiting part 125 and the second end 123 being limited in the mounting structure 11, avoiding the occurrence of offset looseness, thereby ensuring the accuracy of voltage detection results and monitoring the working status of single-chip cells in hydrogen fuel cells, improving the safety of hydrogen fuel cell operation, and reducing operation and maintenance costs. Through the application of the present application, the problem of the prior art that the voltage inspection structure 12 is easily offset and loosened when installed between the cathode plate and the anode plate of the bipolar plate 1 between single-chip cells, affecting the accuracy of the detection results, bringing safety hazards, and increasing operation and maintenance costs is solved.

[0069] Embodiment 3

[0070] A third aspect of the present application provides a hydrogen fuel cell, comprising a bipolar plate 1 .

[0071] Specifically, please refer to the second embodiment for the specific structure of the bipolar plate 1, which will not be described in detail here.

[0072] The third aspect of the present application provides a hydrogen fuel cell, comprising a bipolar plate 1; the bipolar plate 1 comprises a mounting structure 11 and a voltage inspection structure 12; a limiting portion 125 of the voltage inspection structure 12 and a second end 123 of a body 121 are limited to the mounting structure 11. The voltage inspection structure 12 comprises a body 121, the body 121 is in the shape of a long sheet and extends along a first direction A, a signal output portion 124 is provided at a first end 122 of the body 121 in the first direction A, and the signal output portion 124 can extend out of the bipolar plate 1, and at least three limiting portions 125 are provided at intervals at a second end 123 of the body 121 away from the first end 122, and at least three limiting portions 125 have the same or different preset angles R with the first direction A so that the limiting portion 125 and the second end 123 of the body 121 can be limited to the mounting structure 11 of the bipolar plate 1. The present application sets at least three limiting parts 125 at the second end 123 of the body 121, so that the at least three limiting parts 125 provide sufficient contact area with the bipolar plate 1 mounting structure 11. At the same time, by setting at least three limiting parts 125 with the same or different preset angles R with the first direction A, the connection between the limiting part 125 and the mounting structure 11 is constrained by the preset angle R, thereby improving the stability of the limiting part 125 and the second end 123 being limited in the mounting structure 11, avoiding the occurrence of offset looseness, thereby ensuring the accuracy of voltage detection results and monitoring the working status of single-chip cells in hydrogen fuel cells, improving the safety of hydrogen fuel cell operation, and reducing operation and maintenance costs. Through the application of the present application, the problem of the prior art that the voltage inspection structure 12 is easily offset and loosened when installed between the cathode plate and the anode plate of the bipolar plate 1 between single-chip cells, affecting the accuracy of the detection results, bringing safety hazards, and increasing operation and maintenance costs is solved.

[0073] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0074] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A voltage inspection structure, characterized in that: include: A body (121), the body (121) is in the shape of a long sheet and extends along a first direction (A), a first end (122) of the body (121) in the first direction (A) is provided with a signal output portion (124), and the signal output portion (124) can extend out of the bipolar plate (1), and at least three limiting portions (125) are arranged at intervals at a second end (123) of the body (121) away from the first end (122), and at least three limiting portions (125) have the same or different preset angles (R) with the first direction (A) so that the limiting portions (125) and the second end (123) of the body (121) can be limited to the mounting structure (11) of the bipolar plate (1).

2. The voltage inspection structure according to claim 1, characterized in that: There are four limiting portions (125) which are symmetrically arranged in pairs on both sides of the second end (123) of the body (121) in a second direction (B) perpendicular to the first direction (A).

3. The voltage inspection structure according to claim 1, characterized in that: There are three limiting portions (125), wherein two limiting portions (125) are symmetrically arranged on both sides of the second end (123) in a second direction (B) perpendicular to the first direction (A), and another limiting portion (125) is arranged on one side of the second end (123) in the second direction (B) and is spaced apart from the limiting portion (125) on the corresponding side.

4. The voltage inspection structure according to claim 1, characterized in that: There are three limiting portions (125), and the three limiting portions (125) are alternately arranged along the first direction (A) on both sides of the second end (123) in a second direction (B) perpendicular to the first direction (A), and the intervals between the three limiting portions (125) and two adjacent connection points of the three connection points of the second end (123) are the same.

5. The voltage inspection structure according to any one of claims 1 to 4, characterized in that: The limiting portion (125) is in the shape of a long sheet, and the limiting portion (125) extends along a second direction (B) perpendicular to the first direction (A), or is inclined relative to the second direction (B) toward the first end (122) of the body (121).

6. The voltage inspection structure according to claim 5, characterized in that: An arc-shaped transition surface (1251) is provided at the end of the limiting portion (125) away from the second end (123).

7. The voltage inspection structure according to claim 6, characterized in that: The limiting portion (125) is provided with at least one first through hole (1252) along the thickness direction of the body (121), and the second end (123) of the body (121) is provided with at least one second through hole (1231) along the thickness direction, and the first through hole (1252) and the second through hole (1231) are used to prevent glue overflow between the limiting portion (125), the second end (123) of the body (121) and the mounting structure (11) of the bipolar plate (1).

8. The voltage inspection structure according to claim 7, characterized in that: The limiting portion (125), the signal output portion (124) and the main body (121) are integrally formed.

9. A bipolar plate, characterized in that: include: Mounting structure (11); According to the voltage inspection structure (12) as described in any one of claims 1 to 8, the limiting portion (125) of the voltage inspection structure (12) and the second end (123) of the body (121) are limited to the mounting structure (11).

10. A hydrogen fuel cell, characterized in that: include: The bipolar plate (1) as claimed in claim 9.

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