CN214280019U - Bipolar plate of fuel monocell, inspection plug-in and fuel cell stack - Google Patents

Abstract

The utility model provides a bipolar plate of fuel monocell, patrol and examine the plug-in components and include this bipolar plate and patrol and examine the fuel cell pile of plug-in components. The bipolar plate comprises a bipolar plate body, a connecting piece and a conductive clamp. The inspection plug-in comprises a pluggable conductive clip. Because the conductive clip has certain thickness in the thickness direction of the bipolar plate, the contact part clamped with the conductive clip can be more accurately and more quickly inserted into the slot of the inspection plug-in unit, thereby effectively improving the assembly efficiency of the fuel cell stack and also improving the inspection precision. In addition, the fuel cell stack has a simple structure and is particularly easy to assemble and disassemble.

Description

Bipolar plate of fuel monocell, inspection plug-in and fuel cell stack

Technical Field

The utility model belongs to the technical field of the fuel cell technique and specifically relates to a bipolar plate of fuel cell, patrol and examine the plug-in components and include this bipolar plate and patrol and examine the fuel cell pile of plug-in components.

Background

As one of new energy batteries, fuel cells have been the hot spot of research in new energy industry. In a fuel cell stack, bipolar plates and Membrane Electrodes (MEAs) constituting a fuel cell are important components and play important roles in distributing gas, draining water, conducting heat, conducting electricity, and the like. It is extremely important to investigate whether or not the operating voltage of the fuel cell is normal. And detecting a voltage signal of the fuel single cell in the working state, and electrically connecting the routing inspection harness with the conductive bipolar plate. At present, various connection forms exist in the market, but the connection forms have many defects, such as unstable connection, complex structure, complex installation and disassembly steps and the like.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of an aspect of the present invention provides a bipolar plate for a fuel cell. An embodiment of another aspect of the present invention provides an inspection plug-in unit, which is used for connecting with the bipolar plate to detect the voltage of the bipolar plate. Yet another aspect of the present invention provides a fuel cell stack.

According to an aspect of the present invention, a bipolar plate of a fuel cell includes: the bipolar plate comprises a bipolar plate body, wherein notches are formed at the corners of the bipolar plate body; and a connector located in the notch and connected to a first edge of the notch, the connector including a contact portion protruding from the first edge in a first direction.

A bipolar plate for a fuel cell according to an embodiment of the present invention includes a connector located in a notch of a bipolar plate body and connected to a first edge of the notch. The contact portion of the connector protrudes from the first edge of the notch in the first direction so that at least a portion of the connector is located in the notch, making the size of the bipolar plate of the fuel cell smaller and the structure more reasonable.

In addition, the bipolar plate of the fuel cell according to the present invention has the following additional technical features:

according to the utility model discloses an on the other hand embodiment provide patrol and examine the plug-in components be used for with the utility model discloses an in any one of the above-mentioned embodiment fuel cell's bipolar plate connect so that carry out voltage detection to it, should patrol and examine the plug-in components and include: a plurality of conductive clips; the insulating body is provided with a plurality of parallel inserting grooves, the inserting grooves are arranged at intervals along a preset direction, the conductive clamps can be pulled out and inserted and are matched in the inserting grooves in a one-to-one correspondence mode, and the conductive clamps can clamp the contact parts.

In some embodiments, the conductive clip includes a first conductive sheet and a second conductive sheet that are disposed at intervals in the preset direction, the first conductive sheet includes a first body and a first protrusion disposed on the first body, the first protrusion is located between the first conductive sheet and the second conductive sheet in the preset direction, or the first conductive sheet includes a first body and a first protrusion disposed on the first body, the second conductive sheet includes a second body and a second protrusion disposed on the second body, the first protrusion and the second protrusion are opposite in the preset direction, and the contact portion can be sandwiched between the first protrusion and the second protrusion.

In some embodiments, the conductive clip further comprises a connecting tab, a first end of the connecting tab is connected to the first conductive tab, and a first end of the connecting tab is connected to the second conductive tab, so that the conductive clip is U-shaped.

In some embodiments, the slot has a first sidewall surface and a second sidewall surface opposite to each other in the predetermined direction, the first conductive sheet is located between the first sidewall surface and the second conductive sheet in the predetermined direction, wherein the first side wall surface is provided with a third convex part, the second side wall surface is provided with a fourth convex part, a first groove is arranged on the side surface of the first conducting plate, a second groove is arranged on the side surface of the second conducting plate, at least a portion of the third projection fits within the first recess, at least a portion of the fourth projection fits within the second recess, a part of the first conductive sheet protrudes in a direction adjacent to the second conductive sheet so as to form the first protrusion and the first groove, a portion of the second conductive sheet protrudes in a direction adjacent to the first conductive sheet so as to form the second protrusion and the second groove.

In some embodiments, one side of slot is opened so that construct the opening, bipolar plate the joint portion is followed the opening stretches out the slot, it further includes joint spare to patrol and examine the plug-in components, joint spare movably is established between joint position and disengagement position on the insulator, be provided with second draw-in groove or second arch on the joint spare, wherein be located the joint position the second arch of joint spare is located in the first draw-in groove of joint portion or the first arch of joint portion is located the joint position the joint spare the second draw-in groove.

In some embodiments, the joint spare is in the joint position with break away from the position between rotationally establish on the insulator, it further includes the torsional spring to patrol and examine the plug-in components, the torsional spring with the joint spare links to each other and will the joint spare is often pushed to the joint position.

According to the utility model discloses a fuel cell pile that still another aspect embodiment provided includes according to the utility model discloses an according to the plug-in components of patrolling and examining that any embodiment provided to and a plurality of fuel monocell, every the fuel monocell includes according to any embodiment the bipolar plate of fuel monocell, it is a plurality of bipolar plate contact portion centre gripping is in patrol and examine a plurality of plug-in components in the electrically conductive clamp, preset the direction be the thickness direction of bipolar plate body.

According to the utility model discloses a bipolar plate in fuel cell pile includes the contact site, patrols and examines plug-in components and includes pluggable conductive clamp. Because the conductive clip has certain thickness in the thickness direction of the bipolar plate, the contact part clamped with the conductive clip can be more accurately and more quickly inserted into the slot of the inspection plug-in unit, thereby effectively improving the assembly efficiency of the fuel cell stack and also improving the inspection precision. In addition, the fuel cell stack has a simple structure and is particularly easy to assemble and disassemble.

Therefore, the utility model discloses a fuel cell galvanic pile of embodiment has simple structure, easily equipment, packaging efficiency height, the high advantage of precision of patrolling and examining.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural view of a fuel cell stack according to an embodiment of the present invention.

Fig. 2 is an enlarged schematic view at a in fig. 1.

Figure 3 is a partial schematic view of a bipolar plate according to an embodiment of the present invention.

Fig. 4 is an enlarged schematic view at B in fig. 3.

Fig. 5 is a partially enlarged schematic view of fig. 4.

Fig. 6 is a partial schematic view of a fuel cell stack according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a conductive clip according to an embodiment of the present invention.

Fig. 8 is an assembly schematic diagram of the inspection plug-in and the conductive clip according to the embodiment of the present invention.

Fig. 9 is a three-dimensional schematic diagram of an inspection plug-in according to an embodiment of the present invention.

Fig. 10 is a three-dimensional schematic view of an insulator according to an embodiment of the invention.

Fig. 11 is a two-dimensional schematic view of an insulator according to an embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

A fuel cell stack 100, a bipolar plate 200 of a fuel cell 110, and an inspection card 300 according to an embodiment of the present invention will be described below with reference to fig. 1 to 11.

The fuel cell stack 100 provided according to the embodiment of the present invention includes a plurality of fuel cells 110 and an inspection plug 300. Each fuel cell 110 includes a bipolar plate 200. The routing inspection insert 300 is coupled to the bipolar plate 200 of the fuel cell 110 to perform voltage detection on the bipolar plate 200.

The bipolar plate 200 of the fuel cell 110 includes a bipolar plate body 210 and a connection member 220. The connector 220 includes a contact portion 221. A notch 211 is formed at a corner (i.e., a corner) of the bipolar plate body 210, the connection member 220 is positioned in the notch 211, and the contact portion 221 is connected to a first edge 2111 of the notch 211 and protrudes from the first edge 2111 in a first direction. The first direction is perpendicular to the thickness direction of the bipolar plate body 210. It can also be said that the contact portion 121 is connected to the edge of the bipolar plate body 110 and protrudes from the edge of the bipolar plate body 110 in the first direction. It is understood that the thickness direction of the bipolar plate body 210 and the thickness direction of the coupling member 220 are the same as the thickness direction of the bipolar plate 200.

The routing inspection insert 300 includes a plurality of conductive clips 230 and an insulator 310. The insulator 310 has a plurality of insertion grooves 311 parallel to each other, and the plurality of insertion grooves 311 are arranged at intervals in a predetermined direction (the thickness direction of the bipolar plate body 210). The plurality of conductive clips 230 are pluggable and fit into the plurality of slots 311 in a one-to-one correspondence, and the contact portions 221 of the plurality of bipolar plates 200 are clamped in the plurality of conductive clips 230 in a one-to-one correspondence. That is, the contact portion 221 of each bipolar plate 200 and the conductive clip 230 clamped on the contact portion 221 are fitted into the corresponding insertion groove 311. The insulator 310 has insulating property, the conductive clip 230 extends into the slot 311, and the insulator 310 ensures that the bipolar plates 200 are all in an insulating state, thereby ensuring the accuracy of inspection work.

Due to the large number of bipolar plates and the thin thickness of the bipolar plates in the fuel cell stack. Therefore, in the related technology, the wiring terminal is installed in the slot of the inspection plug-in unit, and the technical scheme of directly inserting the inspection plug-in unit on the bipolar plate easily causes the insertion dislocation of the bipolar plate, so that the installation of the inspection plug-in unit is inaccurate, and even the inspection result is invalid.

When the fuel cell stack 100 of the present application is assembled, the conductive clip 230 is first clamped on the contact portion 221, and then the conductive clip 230 and the contact portion 221 clamped by the conductive clip are fitted into the insertion groove 311 so as to mount the inspection card 300 on the plurality of fuel cells 110. Since the conductive clip 230 has a certain thickness in the thickness direction of the bipolar plate body 210, the conductive clip 230 and the contact portion 221 clamped by the conductive clip are more easily inserted into the insertion groove 311 of the insulator 310.

According to the utility model discloses a bipolar plate in fuel cell pile includes the contact site, patrols and examines plug-in components and includes pluggable conductive clamp. Because the conductive clip has certain thickness in the thickness direction of the bipolar plate, the contact part clamped with the conductive clip can be more accurately and more quickly inserted into the slot of the inspection plug-in unit, thereby effectively improving the assembly efficiency of the fuel cell stack and also improving the inspection precision. In addition, the fuel cell stack has a simple structure and is particularly easy to assemble and disassemble.

Therefore, the utility model discloses a fuel cell galvanic pile of embodiment has simple structure, easily equipment, packaging efficiency height, the high advantage of precision of patrolling and examining.

A bipolar plate for a fuel cell according to an embodiment of the present invention includes a connector located in a notch of a bipolar plate body and connected to a first edge of the notch. The contact portion of the connector protrudes from the first edge of the notch in the first direction so that at least a portion of the connector is located in the notch, making the size of the bipolar plate of the fuel cell smaller and the structure more reasonable.

For convenience, the following description will take the thickness direction (predetermined direction) of the bipolar plate body 210 as the front-back direction, and the first direction as the up-down direction as an example, to describe the technical solution of the present application. The front-back direction and the up-down direction are shown by arrows in fig. 1.

As shown in fig. 1 and 2, the fuel cell stack 100 of the present embodiment includes a plurality of first fuel unit cells and a plurality of second fuel unit cells stacked in the thickness direction (front-rear direction) of the bipolar plate body 210. The bipolar plate in the first fuel cell is the bipolar plate 200 described in the above embodiment of the present invention.

In some embodiments, the first fuel cells and the second fuel cells are arranged alternately, the second fuel cells including bipolar plate bodies.

In other embodiments, the first fuel cells and the second fuel cells are alternately arranged, the bipolar plate of the second fuel cell includes a bipolar plate body and a connecting member connected to the bipolar plate body, and the connecting member of the bipolar plate of the second fuel cell and the connecting member of the bipolar plate of the first fuel cell are opposed in the front-rear direction. The routing insert 300 is also provided with a receiving groove capable of receiving the coupling member of the bipolar plate of the second fuel cell, which is understood to be located between two adjacent insertion grooves 311 in the front-rear direction.

It will be understood by those skilled in the art that in other embodiments, the arrangement of the slots 311 and the accommodating grooves on the routing inspection insert 300 may be designed according to the design of the stacked fuel cells, and will not be described herein.

In some embodiments, the bipolar plate body 210 and the connection member 220 of the bipolar plate 200 are located on the same plane, and the plane of the bipolar plate 200 is parallel to the up-down direction. The bipolar plate body 210 serves as the main portion of the plate, having an anode reaction zone and a cathode reaction zone. A contact portion 221 extends upwardly from its connection with the bipolar plate body 210, the contact portion 221 protruding relative to the bipolar plate body 210. Therefore, the longitudinal direction of the contact portion 221 may be considered as a first direction, i.e., a vertical direction. Further, the width direction of the contact portion 221 is defined as a second direction, and the second direction is taken as a left-right direction as an example to describe the technical solution of the present application. The left-right direction is indicated by arrows in fig. 1.

Specifically, the contact portion 221 is connected to a first edge 2111 of the notch 211, the first edge 2111 being a portion of the upper edge of the bipolar plate body 210, the contact portion 221 can be considered to extend upwardly from the upper edge of the bipolar plate body 210. It will be appreciated that the one portion of the upper edge of the bipolar plate body 210 is located below the other portion of the upper edge. Further, the upper edge of the connection member 220 is positioned below the other portion of the upper edge of the bipolar plate body 210, whereby the connection member 220 can be completely positioned in the notch 211.

Optionally, the size of the notch 211 is 20mm by 20 mm.

Further, as shown in fig. 4, the notch 211 has a second edge 2112, the second edge 2112 is perpendicular to the first edge 2111, and the connection member 220 and the second edge 2112 have a certain distance in the left-right direction, so that the inspection card 300 can be smoothly inserted.

As shown in fig. 6, the notches 211 of the plurality of bipolar plates 200 of the fuel cell stack 100 are opposed in the front-rear direction, and the coupling members 220 of the plurality of bipolar plates 200 are opposed in the front-rear direction. Since a membrane electrode is interposed between two adjacent bipolar plates 200, two adjacent coupling members 220 are spaced apart in the front-rear direction, and the conductive clip 230 is interposed between the coupling members 220.

In some embodiments, the conductive clip 230 includes a first conductive tab 231 and a second conductive tab 232 disposed spaced apart in a thickness direction of the bipolar plate body 210. The conductive clip 230 is sandwiched between the contact portion 221 and the second conductive sheet 232, and the contact portion 221 is located between the first conductive sheet 231 and the second conductive sheet 232 in the thickness direction of the bipolar plate body 210.

The first conductive sheet 231 includes a first body and a first protrusion 233 provided on the first body, the first protrusion 233 being located between the first conductive sheet 231 and the second conductive sheet 232 in the thickness direction of the bipolar plate body 210. The contact portion 221 is sandwiched between the first protrusion 233 and the second conductive sheet 232. That is, both side surfaces of the contact portion 221 in the thickness direction of the bipolar plate body 210 are respectively abutted against the first protrusion 233 and the second conductive sheet 232, so that the bipolar plate 200 is electrically connected to the conductive clip 230.

Alternatively, the first conductive sheet 231 includes a first body and a first projection 233 provided on the first body, the second conductive sheet 232 includes a second body and a second projection 234 provided on the second body, and each of the first projection 233 and the second projection 234 is located between the first conductive sheet 231 and the second conductive sheet 232 in the thickness direction of the bipolar plate body 210. The first and second projections 233 and 234 are opposed in the thickness direction of the bipolar plate body 210. The contact portion 221 is sandwiched between the first convex portion 233 and the second convex portion 234. That is, both side surfaces of the contact portion 221 in the thickness direction of the bipolar plate body 210 are respectively abutted against the first and second convex portions 233 and 234, so that the bipolar plate 200 is electrically connected to the conductive clip 230.

Since the conductive clip 230 is provided with the first protruding portion 233 (or the first protruding portion 233 and the second protruding portion 234), so that the conductive clip 230 has a certain thickness in the thickness direction of the bipolar plate body 210, the conductive clip 230 and the connecting member 220 clamped by the conductive clip can be easily inserted into the slot 311 of the insulator 310.

As shown in fig. 2 and 8, the slot 311 of the insulator 310 of the present embodiment is opened downward, and the insulator 310 is mounted to the plurality of bipolar plates 200 from top to bottom. The inspection plug-in 300 further comprises inspection harnesses, wherein the inspection harnesses are connected with each conductive clip 230 in a one-to-one correspondence manner, and extend out of the insulator 310 from an inspection harness outlet formed in the insulator 310. As an example, as shown in fig. 2 and 8, the inspection harness outlet in the present embodiment is located on the upper surface of the insulator 310.

In some embodiments, as shown in FIG. 7, the conductive clip 230 further includes a connecting tab 236. The first end 2211 of the connecting tab 236 is connected to the first conductive tab 231 and the first end 2211 of the connecting tab 236 is connected to the second conductive tab 232 so that the conductive clip 230 is U-shaped. The length direction of the conductive clip 230 is the vertical direction, the width direction of the conductive clip 230 (the width direction of the first conductive sheet 231, the width direction of the second conductive sheet 232) is the horizontal direction, and the thickness direction of the conductive clip 230 is the front-back direction. The conductive clip 230 clips onto the connector 220 from top to bottom, and the tab 236 of the conductive clip 230 is located above the top end of the connector 220. Optionally, the connecting tab 236 of the conductive clip 230 may abut against the top end of the connector 220 to limit the installation of the conductive clip 230.

Further, as shown in fig. 7, the conductive clip 230 is provided with a plurality of first protrusions 233 and a plurality of second protrusions 234. The plurality of first protrusions 233 constitute a plurality of first protrusion groups, which are arranged at intervals in the left-right direction, and each first protrusion group includes a plurality of first protrusions 233 arranged at intervals in the up-down direction. The plurality of second protrusions 234 constitute a plurality of second protrusion groups, which are arranged at intervals in the left-right direction, and each second protrusion group includes a plurality of second protrusions 234 arranged at intervals in the up-down direction. Thereby, the conductive clip 230 can be more firmly clamped on the connection member 220.

Alternatively, the distance between the first convex portion 233 and the second convex portion 234 opposite thereto in the front-rear direction is smaller than the thickness of the connecting member 220 (the contact portion 221), so that the conductive clip 230 can better grip the connecting member 220, so that the conductive clip 230 and the connecting member 220 can be more firmly clamped (clamped) and the connecting member 220 can also form a more firm electrical connection relationship between the connecting member 220 and the first convex portion 233 and the second convex portion 234, so as to ensure inspection stability. It is understood that the conductive clip 230 has elasticity.

Alternatively, the thickness of the first conductive sheet 231 is 0.2mm, and the thickness of the second conductive sheet 232 is 0.2mm. The first conductive sheet 231 and the second conductive sheet 232 have a pitch of 0.4mm in the thickness direction of the bipolar plate body 210. The first convex portion 233 has a thickness of 0.15mm in the thickness direction of the bipolar plate body 210. The thickness of the second protrusion 234 in the thickness direction of the bipolar plate body 210 is 0.15 mm. The coupling member 220 has a thickness of 0.2mm in the thickness direction of the bipolar plate body 210.

In some embodiments, the slots 311 have a first sidewall surface (not shown) and a second sidewall surface (not shown) that are opposite in the thickness direction (front-to-back direction) of the bipolar plate body 210. The conductive clip 230 is located between the first sidewall surface and the second sidewall surface.

Wherein the first conductive sheet 231 is located between the first sidewall surface and the second conductive sheet 232 in the thickness direction of the bipolar plate body 210. It can also be said that the second conductive sheet 232 is located between the second sidewall surface and the first conductive sheet 231 in the thickness direction of the bipolar plate body 210.

Wherein the first side wall surface is provided with a third convex part, and the second side wall surface is provided with a fourth convex part. A first groove is formed in the side surface of the first conductive plate 231, a second groove 235 is formed in the side surface of the second conductive plate 232, at least a part of the third protrusion fits in the first groove, and at least a part of the fourth protrusion fits in the second groove 235. Through the cooperation as above of first recess and third convex part, second recess 235 and fourth convex part, electrically conductive clamp 230 can realize spacing each other with patrolling and examining plug-in components 300, has improved fuel cell stack 100's structural stability. In addition, the third protrusion and the fourth protrusion can position the inspection plug-in 300 for installation, and when the third protrusion is engaged with the first groove and the fourth protrusion is engaged with the second groove 235, the inspection plug-in 300 is installed in place.

In the embodiment shown in fig. 7, a portion of the first conductive sheet 231 protrudes in a direction adjacent to the second conductive sheet 232 to form a first protrusion 233 and a first groove, and a portion of the second conductive sheet 232 protrudes in a direction adjacent to the first conductive sheet 231 to form a second protrusion 234 and a second groove 235. The structures of the first conductive sheet 231 and the second conductive sheet 232 can be made more reasonable.

Alternatively, the first protrusion 233 and the second protrusion 234 may be press-formed, that is, the first protrusion 233 and the first groove and the second protrusion 234 and the second groove 235 are simultaneously formed by pressing, so that the processing difficulty of the first conductive sheet 231 and the second conductive sheet 232 may be reduced, and the processing efficiency of the first conductive sheet 231 and the second conductive sheet 232 may be improved.

In some embodiments, as shown in fig. 3-6, the connecting element 220 further includes a clamping portion 222, and the clamping portion 222 is provided with a first clamping slot 2221. The inspection plug-in 300 further comprises a clamping piece 320, the clamping piece 320 is movably arranged on the insulator 310 between a clamping position and a disengaging position, and a second protrusion 321 is arranged on the clamping piece 320. The second protrusion 321 of the clamping member 320 located at the clamping position is located in the first clamping groove 2221 of the clamping portion 222, so that the inspection plug-in 300 and the bipolar plate 200 are limited from each other, and further, the inspection plug-in 300 is limited in the pulling direction (e.g., upward direction) thereof, so that the inspection plug-in 300 is prevented from falling off, and the structural stability of the fuel cell stack 100 is improved. Further, the second protrusion 321 of the catching member 320 located at the disengaged position is disengaged from the first catching groove 2221 of the catching portion 222, so that the inspection plug-in 300 can be smoothly removed.

In other embodiments, the connecting member 220 further includes a clamping portion 222, and the clamping portion 222 is provided with a first protrusion. The inspection plug-in 300 further comprises a clamping piece 320, the clamping piece 320 is movably arranged on the insulator 310 between a clamping position and a separation position, and a second clamping groove is formed in the clamping piece 320. The first protrusion of the clamping portion 222 is fitted in the second clamping groove of the clamping member 320 located at the clamping position, so that the inspection plug-in 300 and the bipolar plate 200 are mutually limited, the inspection plug-in 300 is prevented from falling off, and the structural stability of the fuel cell stack 100 is improved.

As an example, the snap-in portion 222 is connected to the contact portion 221. The contact portion 221 and the clamping portion 222 are located on the same plane as the bipolar plate body 210.

Specifically, as shown in fig. 5, the contact portion 221 has a first end 2211 and a second end 2212 opposite to each other in the first direction (up-down direction), the second end 2212 is connected to the bipolar plate body 210 (the first edge 2111 of the notch 211), and the contact portion 221 has a third end 2213 and a fourth end 2214 opposite to each other in the second direction (left-right direction).

The clamping portion 222 is connected to the third end 2213. The clamping portion 222 has opposite fifth and sixth ends 2222 and 2223 in the first direction. The fifth end 2222 of the snap-in portion 222 is flush with the first end 2211 of the contact portion 221. The sixth end 2223 is located between the fifth end 2222 and the second end 2212 in the first direction. The sixth end 2223 may be provided with a first engaging groove 2221 or a first protrusion. In this embodiment, the sixth end 2223 is provided with a first card slot 2221.

Further, first end 2211, second end 2212, fifth end 2222, and sixth end 2223 are parallel to one another. The clamping portion 222 further includes a seventh end 2224 opposite to the third end 2213 in the second direction. An inner edge of the seventh end 2224 is connected to an outer edge of the fifth end 2222, and an outer edge of the seventh end 2224 is connected to an outer edge of the sixth end 2223, i.e., the seventh end 2224 is inclined upward and rightward. The design makes the structure of the connecting member 220 more reasonable, and also makes the structure of the bipolar plate 200 more concise, further enabling the clamping portion 222 to be more conveniently matched with the clamping member 320.

As an example, the catching member 320 is rotatably provided on the insulator 310 between the catching position and the disengaging position. The inspection plug 300 further includes a torsion spring 330, and the torsion spring 330 is connected to the latch 320 and normally pushes the latch 320 to the latching position. Exerting force to joint piece 320 can make joint piece 320 move from the joint position with joint portion 222 complex to the position that breaks away from, when releasing this force, joint piece 320 can get back to the joint position automatically under the effect of torsional spring 330, and torsional spring 330 can exert pressure to the joint piece 320 that is in the joint position so that the cooperation is tighter between joint piece 320 and the joint portion 222 to the steadiness of patrolling and examining plug-in 300 is further improved.

Specifically, as shown in fig. 5, the clip 320 is provided on the left side surface of the insulator 310, the clip 320 includes a pressing portion extending in the up-down direction and a catching portion connected to the bottom of the pressing portion and extending in a direction approaching the insulator 310, the second protrusion 321 is provided on the upper surface of the catching portion, and the second protrusion 321 extends in the front-rear direction so as to be fitted with the first catching groove 2221 on the sixth end 2223 of each clip portion 222. In other embodiments, the upper surface of the engaging portion may further be provided with a plurality of second protrusions 321, which can correspond to the first card slots 2221 of the plurality of card connecting portions 222 one to one.

Through pressing the splenium, thereby joint piece 320 can break away from the cooperation with joint portion 222 around pivot clockwise rotation for the dismouting process of patrolling and examining plug-in components 300 is simple convenient more. The installation manner of the torsion spring 330, the rotating shaft and the clamping member 320 is well known to those skilled in the art and will not be described herein.

Further, in order to allow the clamping member 320 and the clamping portion 222 to be clamped better. One side of the insertion groove 311 is opened to configure an opening 312, and the chucking part 222 of the bipolar plate 200 protrudes from the insertion groove 311 through the opening 312. In the embodiment shown in fig. 10, the left side of the slot 311 is open to form an opening 312. When the inspection card 300 is mounted on the bipolar plate 200, the clamping portion 222 of the bipolar plate 200 extends out of the slot 311 from the opening 312 and moves upward relative to the inspection card 300 along the opening 312. When the inspection plug-in 300 is installed in place, the clamping piece 320 can be clamped with the clamping portion 222 extending out of the slot 311.

As shown in fig. 5, the first engaging groove 2221 is disposed on the engaging portion 222, and the second protrusion 321 is disposed on the engaging member 320. A part of the left side surface of the insulator 310 protrudes leftward to form a protrusion 340, at least one third slot 341 capable of being clamped with the second protrusion 321 is disposed on the protrusion 340, and the third slot 341 is opposite to the first slot 2221 in the front-rear direction. When the clamping portion 222 is located at the clamping position, the second protrusion 321 is simultaneously matched with each of the first clamping groove 2221 and the third clamping groove 341, so that the inspection plug-in 300 is clamped with the bipolar plate 200, and the inspection plug-in 300 is self-clamped, so that the connection between the inspection plug-in 30 and the bipolar plate 200 is firmer and more reliable, and the structural stability of the fuel cell stack 100 is further improved.

In some embodiments, the insulator 310 is further provided with an access opening 313 for accessing the inspection harness. In the event of an accident with a certain fuel cell, maintenance can be quickly dealt with through the access opening 313. Alternatively, as shown in fig. 8, the service opening 313 is provided on an end of the insulator 310 away from the contact portion 221.

In some embodiments, at least one reinforcing rib 223 is disposed on the connecting element 220, and optionally, the reinforcing rib 223 includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, the first reinforcing ribs are disposed along the width direction of the connecting element 220, that is, the extending direction of the first reinforcing ribs is perpendicular to the inserting and pulling direction of the inspection plug-in 300. The extending direction of the second reinforcing rib is parallel to the inserting and pulling direction of the inspection plug-in 300.

The beads 223 serve to improve the structural strength of the connection member 220, improve the load-bearing capacity and rigidity thereof, and thus improve the reliability and durability of the bipolar plate 200.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do 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, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A bipolar plate for a fuel cell, comprising:

the bipolar plate comprises a bipolar plate body, wherein notches are formed at the corners of the bipolar plate body; and

a connector located in the notch and connected to a first edge of the notch, the connector including a contact portion protruding from the first edge in a first direction.

2. The bipolar plate for a fuel cell as claimed in claim 1, wherein the connection member further comprises a catching portion provided with a first catching groove or a first protrusion.

3. The bipolar plate for a fuel cell according to claim 2, wherein the contact portion has a first end and a second end opposite to each other in the first direction, the second end is connected to the bipolar plate body, the contact portion has a third end and a fourth end opposite to each other in the second direction, the clamping portion is connected to the third end, the clamping portion has a fifth end and a sixth end opposite to each other in the first direction, the sixth end is located between the fifth end and the second end in the first direction, and the first clamping groove or the first protrusion is provided on the sixth end.

4. An inspection insert for connection with a bipolar plate of a fuel cell according to any one of claims 1 to 3 for voltage detection thereof, comprising:

a plurality of conductive clips; and

the insulating body is provided with a plurality of parallel inserting grooves, the inserting grooves are arranged at intervals along a preset direction, the conductive clamps can be pulled out and inserted and are matched in the inserting grooves in a one-to-one correspondence mode, and the conductive clamps can clamp the contact parts.

5. The inspection insert of claim 4, wherein the conductive clip includes a first conductive tab and a second conductive tab spaced apart in the predetermined direction, the first conductive tab including a first body and a first protrusion provided on the first body, the first protrusion being positioned between the first conductive tab and the second conductive tab in the predetermined direction,

or, the first conducting strip comprises a first body and a first convex part arranged on the first body, the second conducting strip comprises a second body and a second convex part arranged on the second body, the first convex part and the second convex part are opposite to each other in the preset direction, and the contact part can be clamped between the first convex part and the second convex part.

6. The inspection insert of claim 5, wherein the conductive clip further includes a connecting tab, a first end of the connecting tab being connected to the first conductive tab and a first end of the connecting tab being connected to the second conductive tab such that the conductive clip is U-shaped.

7. The inspection plug-in unit of claim 5, wherein the slot has a first sidewall surface and a second sidewall surface opposite to each other in the preset direction, the first conductive sheet is located between the first sidewall surface and the second conductive sheet in the preset direction, wherein a third protrusion is arranged on the first sidewall surface, a fourth protrusion is arranged on the second sidewall surface, a first groove is arranged on a side surface of the first conductive sheet, a second groove is arranged on a side surface of the second conductive sheet, at least a part of the third protrusion is matched in the first groove, and at least a part of the fourth protrusion is matched in the second groove.

8. The inspection plug-in of claim 4, wherein the inspection plug-in is used for being connected with the bipolar plate of the fuel cell of claim 2 or 3 so as to detect the voltage of the bipolar plate, one side surface of the slot is opened so as to form an opening, the clamping portion of the bipolar plate extends out of the slot from the opening, the inspection plug-in further comprises a clamping piece, the clamping piece is movably arranged on the insulator between a clamping position and a disengaging position, a second clamping groove or a second protrusion is arranged on the clamping piece, and the second protrusion of the clamping piece located in the clamping position is located in the first clamping groove of the clamping portion or the first protrusion of the clamping portion is located in the second clamping groove of the clamping piece located in the clamping position.

9. The inspection plug-in of claim 8, wherein the snap member is rotatably disposed on the insulator between the snap position and the disengaged position, the inspection plug-in further comprising a torsion spring coupled to the snap member and urging the snap member toward the snap position.

10. A fuel cell stack, comprising:

a plurality of fuel cells, each of which comprises the bipolar plate of the fuel cell according to any one of claims 1 to 3; and

the inspection plug-in unit is according to any one of claims 4 to 9, the contact parts of the bipolar plates are clamped in the conductive clamps of the inspection plug-in unit in a one-to-one correspondence manner, and the preset direction is the thickness direction of the bipolar plate body.

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