Bipolar plate sealing ring assembly and electric pile thereof

Abstract

The utility model discloses a bipolar plate sealing ring assembly and a galvanic pile thereof, which belong to the technical field of bipolar plate sealing rings, and comprise a bipolar plate and a sealing ring, the sealing ring wraps the periphery of the bipolar plate, the bipolar plate is provided with a positioning groove, the sealing ring is provided with a positioning strip matched with the positioning groove, and the side surface or the end surface of the bipolar plate is provided with a mounting groove. The installation groove is internally and detachably provided with an inspection probe, the sealing ring is provided with a preformed hole for sealing after one end of the inspection probe passes through the preformed hole, and the inspection probe passes through the sealing ring and is inserted into the installation groove. The sealing ring can exert force on the inspection probe to achieve good contact, the defects that the inspection probe is difficult to install, prone to falling off and prone to short circuit are overcome, and then the assembly working time of the assembly and the system is shortened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bipolar plate sealing ring technical field, more specifically, it relates to a bipolar plate sealing ring assembly and electric pile thereof. BACKGROUND

[0002] Hydrogen fuel cell electric pile still has many defects, although hydrogen fuel cell is applied in life increasingly common, such as hydrogen energy bus, hydrogen energy two-wheeled vehicle etc., and most application scenarios are basically in land scene, its main reason is in the application river and sea ship scene, fuel cell needs to cope with more complex environmental change, high humidity, high corrosiveness etc., and change rapidly;In addition, when fuel cell electric pile integrated power generation system, electric pile is integrated into the box that is usually made of aluminum alloy casting processing, then installs insulating gasket, water absorption drying accessory, hydrogen leakage sensor, single cell voltage inspection unit etc. in the electric pile box, and still needs to add ventilation, such as air compressor import air supply pipe etc.;Secondly, the single cell voltage inspection probe of electric pile is difficult to plug in, contact is poor, easy to fall off, easy to short circuit hidden trouble etc. have been the important link that perplexes system assembly process.

[0003] In view of the above defects, if the electric pile itself reaches IP67 or higher protection level, the above defects can be fundamentally solved, but so far there is no electric pile bare pile design reaching protection level IP67 in the market, the main reason is that the bipolar plate of the electric pile of most manufacturers is exposed, and then the inspection probe is connected to the bipolar plate of the electric pile after the assembly of the electric pile, which needs to be frequently plugged in, in addition, the design engineers are used to the sealing ring being divided into the sealing ring of the two surfaces of the negative and positive plates, and the electric pile is designed in the electric pile machine box and the mature machine box accessory design idea, etc. So how to design the bare pile to reach a high protection level, obviously the electric pile is a multi-layer component stacked power generation device, the best solution to improve the protection level is to improve each stacked component and output electrode of the electric pile to the required protection level, because the current collector plate can be hidden in the electric pile insulating plate slot, and the MEA component is exposed to the outside of the electric pile, which is waterproof and insulated, so only the bipolar plate, inspection probe and output electrode in the electric pile need to be designed and sealed. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide a bipolar plate sealing ring assembly and electric pile thereof to solve the problems in the above background technology.

[0005] According to the first aspect of the utility model, provide a kind of bipolar plate sealing ring assembly, including bipolar plate and sealing ring, the sealing ring is wrapped the periphery of the bipolar plate, positioning groove is provided on the bipolar plate, positioning strip is provided on the sealing ring with the positioning groove cooperation, the side surface or end surface of the bipolar plate is provided with installation groove, detachable installation is provided with inspection probe in the installation groove, the reserved hole of the sealing ring is provided with the end of the inspection probe and sealed after passing, the inspection probe passes through the sealing ring and is inserted into the installation groove.

[0006] In a specific embodiment of the utility model, the positioning strips are symmetrically arranged at two ends of the sealing ring, the positioning strips include first positioning strips, second positioning strips and third positioning strips, two ends of the first positioning strips are respectively connected to two sides of the sealing ring, two ends of the second positioning strips are respectively connected to one end of the first positioning strips and the sealing ring, two ends of the third positioning strips are respectively connected to one end of the first positioning strips and the sealing ring, and the second positioning strips and the third positioning strips are arranged at intervals.

[0007] In a specific embodiment of the utility model, the sealing ring is internally provided with positioning protrusions matched with the positioning grooves.

[0008] In a specific embodiment of the utility model, the bipolar plate is respectively provided with a flow field reaction zone, a distribution zone and a three-cavity inlet and outlet zone, the three-cavity inlet and outlet zone is arranged at the edge of two ends of the bipolar plate, the flow field reaction zone is arranged at the middle position of the bipolar plate, the distribution zone is arranged at the left and right sides of the flow field reaction zone, and the three-cavity inlet and outlet zone is arranged at the two sides of the distribution zone.

[0009] In a specific embodiment of the utility model, the flow field reaction zone is arranged between the two distribution zones, and the flow field reaction zone is internally provided with a plurality of first flow channel ridges, second straight flow channel ridges and flow channel grooves, the first flow channel ridges include straight flow channel ridges and two curved flow channel ridges, and the two curved flow channel ridges are symmetrically arranged at two ends of the straight flow channel ridges.

[0010] In a specific embodiment of the utility model, the distribution zone is internally provided with a plurality of first bosses and through grooves, the first bosses are uniformly distributed in the distribution zone, and a gap is arranged between the first bosses and one end of the first flow channel ridges.

[0011] In a specific embodiment of the utility model, from top to bottom, the left side of the three-cavity inlet and outlet zone at the most edge of the two sides of the bipolar plate is in sequence: a cooling liquid inlet and outlet, an air inlet and outlet and a hydrogen gas inlet and outlet; and from top to bottom, the right side is in sequence: a hydrogen gas inlet and outlet, an air inlet and outlet and a cooling liquid inlet and outlet.

[0012] In a specific embodiment of the utility model, the flow field reaction zone is communicated with the cooling liquid inlet and outlet, and is provided with a conveying channel, a plurality of third flow channel ridges are arranged on the conveying channel, the third flow channel ridges are arranged in a curved manner at one end close to the flow field reaction zone, and the other end of the third flow channel ridges is arranged in a horizontal and straight manner.

[0013] According to the second aspect of the utility model, a bipolar plate sealing ring assembly is provided.

[0014] In a specific embodiment of the utility model, the bipolar plate sealing ring assembly further comprises an end plate, a current collecting plate assembly, a cable waterproof bolt joint assembly and a cable tie, the cable tie is arranged outside the plurality of bipolar plate sealing ring assemblies, the end plate and the current collecting plate assembly are fixed outside the outermost bipolar plate sealing ring assembly through the cable waterproof bolt joint assembly, so as to compress and fix the plurality of bipolar plate sealing ring assemblies.

[0015] The technical scheme of the utility model has at least one of the following advantages or beneficial effects:

[0016] The bipolar plate sealing ring assembly and the electric pile can wrap the sealing ring around the outer periphery of the bipolar plate, wrap the bipolar plate, seal the inserted inspection probe, achieve the dustproof and waterproof effect of the bipolar plate, and have a certain anti-collision protection. The positioning strip on the sealing ring cooperates with the positioning groove, so that the sealing ring can be avoided to be pasted, the force can be applied to the inspection probe to achieve good contact, the defects of difficult installation, easy falling and easy short circuit of the inspection probe are avoided, and the assembly and system assembly time are shortened. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described in connection with the drawings and examples.

[0018] Figure 1 It is the structure schematic view of bipolar plate sealing ring assembly in an embodiment of the utility model.

[0019] Figure 2 It is the structure schematic view of bipolar plate in an embodiment of the utility model.

[0020] Figure 3 It is the sectional view of sealing ring in an embodiment of the utility model.

[0021] Figure 4 It is the sectional view of bipolar plate sealing ring assembly in an embodiment of the utility model.

[0022] Figure 5 It is the exploded structure schematic view of electric pile in an embodiment of the utility model. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components have the same reference numerals throughout the several drawings and will not be redundantly described. The embodiments described below are exemplary only, and are not intended to limit the present application.

[0024] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more. Greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described as first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0026] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features.

[0027] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection or movable connection, or detachable connection or non-detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements, indirect communication or the interaction relationship between two elements.

[0028] The following disclosure provides many different embodiments or examples for implementing different aspects of the present application.

[0029] Reference Figures 1 to 5As shown, a bipolar plate sealing ring assembly is provided, including a bipolar plate 1 and a sealing ring 2, the sealing ring 2 wraps the outer periphery of the bipolar plate 1, the bipolar plate 1 is provided with a positioning groove 11, the sealing ring 2 is provided with a positioning strip 21 matched with the positioning groove 11, the side or end surface of the bipolar plate 1 is provided with a mounting groove 12, and a patrol probe 3 is detachably mounted in the mounting groove 12, the sealing ring 2 is provided with a reserved hole through which one end of the patrol probe 3 passes and is sealed, and the patrol probe 3 passes through the sealing ring 2 and is inserted into the mounting groove 12.

[0030] In this embodiment, the sealing ring 2 is sleeved on the outer periphery of the bipolar plate 1, the sealing ring 2 wraps the outer edge and outer corner of the bipolar plate 1, and is connected with the positioning groove 11 on the bipolar plate 1, so as to be securely sleeved on the bipolar plate 1, which can prevent water and dust, and also has a certain anti-collision protection. The sealing ring 2 can directly wrap the bipolar plate 1, which avoids the pasting mode of the bipolar plate sealing ring. The patrol probe 3 is installed first and then the sealing ring 2 is sleeved, which can exert force on the patrol probe 3 to achieve good contact, and avoids the defects of difficult installation, easy falling off and easy short circuit of the patrol probe 3, thereby shortening the assembly time of the assembly and system.

[0031] In the bipolar plate sealing ring assembly, the sealing ring 2 completely wraps the four sides of the bipolar plate 1, and the sealing ring 2 covers the positioning groove 11 on both sides of the bipolar plate 1, so as to achieve the independent sealing of the medium channel after the bipolar plate is pressed, and also wrap the four sides of the bipolar plate 1 to achieve sealing and insulation. At the same time, the material of the four-side sealing ring 2 can also have a certain anti-collision protection. Therefore, the sealing ring 2 of the bipolar plate 1 has only one. Of course, the sealing ring 2 should have the physical and chemical properties of high and low temperature resistance, oxidation resistance, corrosion resistance and long service life. The sealing ring 2 can be pre-made and then sleeved on the bipolar plate 1, or directly generated on the bipolar plate 1 by means of an injection molding machine, so as to avoid the pasting process of the sealing ring.

[0032] Before the sealing ring 2 is formed, the single battery voltage patrol probe 3 needs to be installed in advance. The patrol probe 3 can also be designed as a wire, and the two are integrated during the manufacturing process. For example, the wire insulation layer and the sealing ring 2 are made of different materials, but they must be sealed. In this drawing, a wire is used instead of a patrol probe. The probe installation position is designed on the inside side of the sealing ring 2. The probe is in good contact with the bipolar plate 1 under the condition of the tightening force of the sealing ring 2. Of course, a special-shaped strip or sheet probe can also be used instead. The probe is designed on the upper or lower end surface of the inside of the sealing ring 2. The probe is pressed by the stacking and pressing force of the bipolar plate 1, so as to ensure good contact with the bipolar plate 1. In this way, the waterproof and dustproof and fixing design between the probe and the bipolar plate 1 are solved.

[0033] The inspection probe 3 of the bipolar plate sealing ring assembly is connected with a CVM inspection module (waterproof and dustproof by itself), and the connection can be achieved by using waterproof terminals or waterproof accessories such as soldering rings, so that the waterproof and dustproof connection between the stack and the CVM inspection module is achieved.

[0034] In one embodiment of the utility model, the positioning strips 21 are symmetrically arranged at the two ends of the sealing ring 2, the positioning strip 21 comprises a first positioning strip 211, a second positioning strip 212 and a third positioning strip 213, the two ends of the first positioning strip 211 are connected with the two sides of the sealing ring 2 respectively, the two ends of the second positioning strip 212 are connected with the first positioning strip 211 and one end of the sealing ring 2 respectively, the two ends of the third positioning strip 213 are connected with the first positioning strip 211 and one end of the sealing ring 2 respectively, the second positioning strip 212 and the third positioning strip 213 are arranged at intervals, the hole area formed by the second positioning strip 212, the first positioning strip 211 and the edge of the sealing ring 2 is the largest, the hole area formed by the second positioning strip 212, the first positioning strip 211 and the third positioning strip 213 is the second largest, and the hole area formed by the third positioning strip 213, the first positioning strip 211 and the edge of the sealing ring 2 is the smallest.

[0035] Further, the inside of the sealing ring 2 is provided with a positioning protrusion 22 matched with the positioning groove 11, the positioning protrusion 22 can be embedded in the positioning groove 11, so that the sealing ring 2 is better fixed after being sleeved.

[0036] In one embodiment of the utility model, the bipolar plate 1 is respectively provided with a flow field reaction area 13, a distribution area 14 and a three-cavity inlet and outlet area 15, the three-cavity inlet and outlet area 15 is arranged at the edge of the two ends of the bipolar plate 1, the flow field reaction area 13 is arranged at the middle position of the bipolar plate 1, the distribution area 14 is arranged at the left and right sides of the flow field reaction area 13, and the three-cavity inlet and outlet area 15 is arranged at the two sides of the distribution area 14.

[0037] Further, the flow field reaction area 13 is arranged between the two distribution areas 14, and the flow field reaction area 13 is provided with a plurality of first flow channel ridges 131, second straight flow channel ridges 132 and flow channel grooves 133. Figure 2 The bending directions of the two ends of the straight flow channel ridges 1311 of the upper part are downward, the bending directions of the two ends of the straight flow channel ridges 1311 of the lower part are upward, the first flow channel ridges 131 are adjacent to the second straight flow channel ridges 132, so that the cooling liquid runs smoothly in the flow field reaction area 13.

[0038] The distribution area 14 is provided with a plurality of first bosses 141 and through grooves 142, the first bosses 141 are uniformly distributed in the distribution area 14, and a gap is formed between the first bosses 141 and one end of the first flow channel ridge 131; and a plurality of first bosses 141 are uniformly distributed on the distribution area 14, so that the space of the cooling liquid channel is greatly increased.

[0039] In one embodiment of the utility model, the left side of the three-cavity inlet and outlet area 15 of the most edge of the bipolar plate 1 is sequentially provided from top to bottom with a cooling liquid inlet and outlet, an air inlet and outlet, and a hydrogen gas inlet and outlet; and the right side is sequentially provided from top to bottom with a hydrogen gas inlet and outlet, an air inlet and outlet, and a cooling liquid inlet and outlet.

[0040] Further, the flow field reaction area 13 is connected with the cooling liquid inlet and outlet, and is provided with a conveying channel 134, the conveying channel 134 is provided with a plurality of third flow channel ridges 135, the third flow channel ridges 135 are uniformly distributed on the conveying channel 134, one end of the third flow channel ridges 135 close to the flow field reaction area 13 is arranged in a curved manner, and the other end of the third flow channel ridges 135 is arranged in a horizontal and straight manner, so as to ensure smooth operation of the cooling liquid.

[0041] In the second embodiment of the utility model, an electric pile is provided, which comprises a bipolar plate sealing ring assembly.

[0042] In one embodiment of the utility model, the electric pile further comprises an end plate 71, a current collecting plate assembly, a cable waterproof bolt joint assembly 72, and a cable tie 73, the cable tie 73 is bound and arranged outside the plurality of bipolar plate sealing ring assemblies, the end plate 71 and the current collecting plate assembly are fixed outside the outermost bipolar plate sealing ring assembly through the cable waterproof bolt joint assembly 72, so as to compress and fix the plurality of bipolar plate sealing ring assemblies, the electric pile can be exposed in air, or even put into water of a certain depth, and the electric pile cabinet can be omitted due to its own sealing property, only a hydrogen gas leakage sensor needs to be installed in the electric pile system, high-pressure air does not need to be branched to the electric pile cabinet for purging and dilution, the drying function of the electric pile cabinet is also omitted, and the condensation and dust accumulation hazards of the electric pile are completely eliminated.

[0043] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A bipolar plate gasket assembly comprising a bipolar plate (1) and a gasket (2), characterized in that, The sealing ring (2) wraps the outer periphery of the bipolar plate (1), the bipolar plate (1) is provided with a positioning groove (11), the sealing ring (2) is provided with a positioning strip (21) matched with the positioning groove (11), the side surface or the end surface of the bipolar plate (1) is provided with a mounting groove (12), the mounting groove (12) is detachably mounted with an inspection probe (3), the sealing ring (2) is provided with a reserved hole allowing one end of the inspection probe (3) to pass through and be sealed, and the inspection probe (3) passes through the sealing ring (2) and is inserted into the mounting groove (12).

2. The bipolar plate gasket assembly of claim 1, wherein, The positioning strip (21) is symmetrically arranged at two ends of the sealing ring (2), the positioning strip (21) comprises a first positioning strip (211), a second positioning strip (212) and a third positioning strip (213), two ends of the first positioning strip (211) are connected with two sides of the sealing ring (2) respectively, two ends of the second positioning strip (212) are connected with the first positioning strip (211) and one end of the sealing ring (2) respectively, two ends of the third positioning strip (213) are connected with the first positioning strip (211) and one end of the sealing ring (2) respectively, and the second positioning strip (212) and the third positioning strip (213) are arranged at intervals.

3. The bipolar plate gasket assembly of claim 1, wherein, The inside of the sealing ring (2) is provided with a positioning protrusion (22) matched with the positioning groove (11).

4. The bipolar plate gasket assembly of claim 1, wherein, The bipolar plate (1) is respectively provided with a flow field reaction area (13), a distribution area (14) and a three-cavity inlet and outlet area (15), the three-cavity inlet and outlet area (15) is arranged at the edge of the two ends of the bipolar plate (1), the flow field reaction area (13) is arranged at the middle position of the bipolar plate (1), the distribution area (14) is arranged on the left and right sides of the flow field reaction area (13), and the three-cavity inlet and outlet area (15) is arranged on the left and right sides of the distribution area (14).

5. The bipolar plate gasket assembly of claim 4, wherein, The flow field reaction area (13) is arranged between the two distribution areas (14), and the flow field reaction area (13) is provided with a plurality of first flow channel ridges (131), second straight flow channel ridges (132) and flow channel grooves (133), the first flow channel ridge (131) comprises a straight flow channel ridge (1311) and two curved flow channel ridges (1312), and the two curved flow channel ridges (1312) are symmetrically arranged at two ends of the straight flow channel ridge (1311).

6. The bipolar plate gasket assembly of claim 5, wherein, The distribution area (14) is provided with a plurality of first bosses (141) and through grooves (142), the first bosses (141) are uniformly distributed in the distribution area (14), and a gap is formed between the first boss (141) and one end of the first flow channel ridge (131).

7. The bipolar plate gasket assembly of claim 4, wherein, From top to bottom, the left side of the three-cavity inlet and outlet area (15) of the most edge of the bipolar plate (1) is sequentially the cooling liquid inlet and outlet, the air inlet and outlet and the hydrogen gas inlet and outlet, and from top to bottom, the right side is sequentially the hydrogen gas inlet and outlet, the air inlet and outlet and the cooling liquid inlet and outlet.

8. The bipolar plate gasket assembly of claim 7, wherein, The flow field reaction zone (13) is communicated with the cooling liquid inlet and outlet, and is provided with a conveying channel (134), the conveying channel (134) is provided with a plurality of third flow channel ridges (135), the plurality of third flow channel ridges (135) are uniformly distributed on the conveying channel (134), one end of the third flow channel ridge (135) close to the flow field reaction zone (13) is curved, and the other end of the third flow channel ridge (135) is horizontally straight.

9. A stack, characterized by A bipolar plate seal ring assembly as claimed in any one of claims 1 to 8.

10. The stack of claim 9, wherein, Further comprising an end plate (71), a current collector plate assembly, a cable waterproof bolt joint assembly (72), and a cable tie (73), the cable tie (73) is bundled and arranged outside the plurality of bipolar plate seal ring assemblies, the end plate (71) and the current collector plate assembly are fixed outside the outermost bipolar plate seal ring assembly through the cable waterproof bolt joint assembly (72), so as to compress and fix the plurality of bipolar plate seal ring assemblies.

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