CN212113894U

CN212113894U - Bipolar plate, fuel cell and vehicle

Info

Publication number: CN212113894U
Application number: CN202020935699.1U
Authority: CN
Inventors: 付宇; 李春峰
Original assignee: Shanghai Jiyi Hydrogen Energy Technology Co ltd
Current assignee: Shanghai Jiyi Hydrogen Energy Technology Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-12-08
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a bipolar plate, fuel cell and vehicle relates to fuel cell technical field. This bipolar plate includes positive pole veneer and negative pole veneer, be equipped with first grafting recess on the positive pole veneer, be equipped with the second grafting recess that corresponds with first grafting recess position on the negative pole veneer, first grafting recess forms the spliced eye with second grafting recess, it pegs graft in the spliced eye to patrol and examine the contact pin, be equipped with the pin hole on one in first grafting recess and the second grafting recess, the pin hole setting is worn out to the pin end of patrolling and examining the contact pin, and will patrol and examine the pin end riveting of contact pin in pin hole department. This bipolar plate is through establishing first grafting recess and second grafting recess and forming the spliced eye respectively on positive pole veneer and negative pole veneer, patrols and examines the contact pin and can peg graft in the spliced eye, further establishes the pin hole and draws forth and rivet it in pin hole department from the pin hole with the pin end of patrolling and examining the contact pin, has strengthened the steadiness that patrols and examines contact pin and bipolar plate and be connected.

Description

Bipolar plate, fuel cell and vehicle

Technical Field

The utility model relates to a fuel cell technical field, concretely relates to bipolar plate, fuel cell and vehicle.

Background

A fuel cell is a power generation device that directly converts chemical energy in a fuel (e.g., hydrogen) and an oxidant (e.g., oxygen in air) into electrical energy. Because the electrochemical reaction is adopted, no combustion heat release exists, and the restriction of a Carnot cycle is avoided, the energy conversion efficiency is much higher than that of a common heat engine. In addition, the fuel cell has the advantages of no pollution, low noise, high reliability and the like, and has very wide market prospect in the fields of transportation, fixed power generation, portable power generation and the like.

In a fuel cell, bipolar plates, membrane electrodes, seal assemblies, etc. are key components thereof. The metal bipolar plate has high mechanical strength, good thermal conductivity, strong gas barrier property, low manufacturing cost and the like, and is gradually used in fuel cell stacks instead of graphite bipolar plates. The fuel cell is formed by assembling hundreds of bipolar plates and a membrane electrode in a laminated mode, wherein a single cell is formed between the two bipolar plates by the membrane electrode, and the single cells are connected in series to form the whole electric pile. The voltage of the electric pile is formed by the accumulation of the voltage of the single cells forming the electric pile, and the performance of each single cell is an important factor influencing the performance of the electric pile of the fuel cell, so that the voltage of each cell needs to be detected, the integral safe and reliable operation of the electric pile is ensured, and meanwhile, when the fuel cell has a fault problem, which cell has the fault can be accurately judged. The operative connection of the battery routing inspection system to the individual cells of the fuel cell plays a critical role.

At present, a fuel cell connects an inspection system and a bipolar plate through an inspection terminal wiring, so that the voltage of a single cell can be monitored in real time. The inspection terminal and the bipolar plate are firmly connected well, so that accurate detection of the single-section voltage can be ensured. In the prior art, a routing inspection terminal is connected with a bipolar plate in a welding mode or a plug-in mode; for the welding type, because the metal bipolar plate is thin, the welding point is easy to fall off when the inspection terminal and the bipolar plate are directly welded, and the welding point can damage the bipolar plate and can cause short circuit and other adverse effects on the fuel cell. The plug-in type has the defects that the falling of the inspection terminal is caused by the condition that the jack and the plug are not clamped or the non-clamping condition exists, the voltage drop of the single battery to be detected is directly caused to be zero, and the adverse effect is caused to a voltage detection system.

Accordingly, there is a need for a bipolar plate, a fuel cell and a vehicle to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bipolar plate, fuel cell and vehicle, this bipolar plate have strengthened the steadiness of patrolling and examining contact pin and bipolar plate and being connected, have guaranteed single pond voltage real-time supervision's stability.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a bipolar plate, includes positive pole veneer and negative pole veneer, be equipped with first grafting recess on the positive pole veneer, be equipped with on the negative pole veneer with the second grafting recess that first grafting recess position corresponds, first grafting recess forms the spliced eye with second grafting recess, patrol and examine the contact pin peg graft in the spliced eye, first grafting recess with be equipped with the pin hole on one of second grafting recess, the pin end of patrolling and examining the contact pin is worn out the pin hole sets up, and will the pin end riveting of patrolling and examining the contact pin in pin hole department.

Optionally, the first inserting groove is formed in the edge of the anode single plate, and the second inserting groove corresponding to the first inserting groove is formed in the edge of the cathode single plate.

Optionally, the first inserting groove extends from the edge of the anode single plate, and the second inserting groove corresponding to the first inserting groove extends from the edge of the cathode single plate.

Optionally, the lead terminal forms a rivet point at the lead hole, the rivet point is located outside the insertion hole, and the size of the rivet point is larger than that of the lead hole.

Optionally, the inspection contact pin abuts against the inner wall of the plug hole.

Optionally, the cross-sectional area of the plug hole is circular or rectangular.

Optionally, the shape of the lead hole is circular, elliptical or rectangular.

A fuel cell comprising a bipolar plate as described above.

Optionally, the bipolar plate is provided in plurality, and a plurality of the bipolar plates are stacked in the current flowing direction.

A vehicle comprising a fuel cell as described above.

The utility model has the advantages that:

the utility model provides a pair of bipolar plate, fuel cell and vehicle, this bipolar plate is through establishing first grafting recess and second grafting recess and forming the spliced eye respectively on positive pole veneer and negative pole veneer, it can peg graft in the spliced eye to patrol and examine the contact pin, further establish the pin hole and draw forth and rivet it in pin hole department from the pin hole with the pin end that will patrol and examine the contact pin, strengthened the fastness of patrolling and examining contact pin and bipolar plate connection, consequently guaranteed single cell voltage real-time supervision's stability.

Drawings

Fig. 1 is a schematic view of an overall structure of a bipolar plate according to an embodiment of the present invention;

fig. 2 is a schematic view of an overall structure of a bipolar plate according to a first embodiment of the present invention;

fig. 3 is a schematic partial structural view of a plug hole of a bipolar plate according to an embodiment of the present invention;

fig. 4 is a schematic partial structural view of a plug hole of a bipolar plate according to a first embodiment of the present invention;

fig. 5 is a schematic view of a matching structure between a plugging hole of a bipolar plate and a polling pin according to an embodiment of the present invention.

In the figure:

100. pin inspection is carried out; 200. riveting points;

1. an anode single plate; 11. a first insertion groove; 111. a wire hole; 2. a cathode single plate; 21. a second insertion groove; 3. and (7) inserting holes.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Example one

As shown in fig. 1 to 5, the bipolar plate disclosed in this embodiment includes an anode single plate 1 and a cathode single plate 2, and the anode single plate 1 and the cathode single plate 2 are fixedly connected. Further, the anode single plate 1 is provided with a first inserting groove 11. Be equipped with second grafting recess 21 on the negative pole veneer 2, second grafting recess 21 corresponds with the position of first grafting recess 11, and first grafting recess 11 forms spliced eye 3 with the cooperation of second grafting recess 21, patrols and examines contact pin 100 and pegs graft in spliced eye 3, patrols and examines contact pin 100 other end and connects the system of patrolling and examining in order to carry out voltage detection to fuel cell. Be equipped with pin hole 111 on one in first grafting recess 11 and the second grafting recess 21, the pin end that patrols and examines contact pin 100 wears out pin hole 111 and sets up, and will patrol and examine the pin 100 the pin end riveting in pin hole 111 department to the further reinforcing is patrolled and examined contact pin 100 and plug hole 3's the steadiness of being connected.

An anode flow field is engraved on the anode single plate 1, hydrogen is introduced to the anode side of the membrane electrode through the anode flow field, and the hydrogen generates a chemical reaction of electron losing in the anode catalyst layer. Further, as shown in fig. 3, a first inserting groove 11 extends from an edge of the anode single plate 1, and the first inserting groove 11 and the anode single plate 1 are integrally disposed to enhance the connection stability between the first inserting groove 11 and the anode single plate 1.

Correspondingly, a cathode flow field is engraved on the cathode single plate 2, oxygen is introduced to the cathode side of the membrane electrode through the cathode flow field, and the oxygen generates an electronic chemical reaction on the cathode catalyst layer. As shown in fig. 4, a second inserting groove 21 corresponding to the first inserting groove 11 extends from the edge of the cathode single plate 2, and the second inserting groove 21 is also integrally formed with the cathode single plate 2 to enhance the connection stability between the second inserting groove 21 and the cathode single plate 2. The formation of the plug-in hole 3 by the extended first plug-in groove 11 and the second plug-in groove 21 avoids direct welding on the bipolar plate, ensuring the integrity of the bipolar plate.

Illustratively, the cross-sectional area of the insertion hole 3 is circular or rectangular to facilitate insertion of the inspection pin 100 of a corresponding shape, and the cross-sectional area of the insertion hole 3 of the present embodiment is set to be rectangular to facilitate insertion of the inspection pin 100 of a rectangular shape.

The shape of the lead hole 111 may be set to be circular, elliptical or rectangular to facilitate the leading-out of the corresponding lead terminal.

As shown in fig. 5, the inspection pin 100 is made of brass, and its surface is plated with tin, and the inspection pin 100 has a lead end, and the lead end is led out from the lead hole 111 by soldering after the inspection pin 100 is inserted into the insertion hole 3. The pin terminals in this embodiment are soldering tin, and adopt the soldering pen to weld in pin hole 111 department and form riveting point 200, rivet structure promptly, riveting point 200 is located the outside of spliced eye 3, and riveting point 200's size is greater than pin hole 111's size, realizes not hindering under the condition of bipolar plate, will patrol and examine contact pin 100 and be connected fixedly with the bipolar plate, further strengthens patrolling and examining the steadiness that contact pin 100 and bipolar plate are connected.

When the voltage of a single fuel cell needs to be detected, the inspection contact pins 100 are respectively inserted into the insertion holes 3 on the two adjacent bipolar plates, and the other ends of the inspection contact pins 100 are connected into an inspection system to realize voltage detection.

The present embodiment also provides a fuel cell including the bipolar plate as described above.

Alternatively, the bipolar plate is provided in plural, and the plural bipolar plates are stacked in the direction of current flow to form a fuel cell.

The present embodiment also provides a vehicle including the fuel cell as described above.

Example two

In this embodiment, the same portions as those in the first embodiment are given the same reference numerals, and the same description is omitted.

With respect to the first embodiment, the present embodiment provides a bipolar plate having such differences: a first inserting groove 11 is formed in the edge of the anode single plate 1, and the first inserting groove 11 is formed integrally with the anode single plate 1 by punch forming; the edge of the cathode single plate 2 is provided with a second inserting groove 21 corresponding to the position of the first inserting groove 11, the second inserting groove 21 is also integrally formed with the cathode single plate 2 by adopting punch forming, and the first inserting groove 11 and the second inserting groove 21 are matched to form an inserting hole 3.

Other structures in this embodiment are the same as those in the first embodiment, and are not described herein again.

The embodiment of the utility model provides a bipolar plate, through establish first grafting recess 11 and second grafting recess 21 respectively and form spliced eye 3 on positive pole veneer 1 and negative pole veneer 2, it can peg graft in spliced eye 3 to patrol and examine contact pin 100, further establish lead hole 111 in order to draw forth and rivet it in lead hole 111 department from lead hole 111 the pin end of patrolling and examining contact pin 100, and the pin end of patrolling and examining contact pin 100 forms riveting point 200 in lead hole 111 department, riveting point 200 is located the outside of spliced eye 3, and the size of riveting point 200 is greater than the size of lead hole 111, the fastness of patrolling and examining contact pin 100 and bipolar plate connection has been strengthened, consequently, single cell voltage real-time supervision's stability has been guaranteed.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a bipolar plate, includes positive pole veneer (1) and negative pole veneer (2), its characterized in that, be equipped with first grafting recess (11) on positive pole veneer (1), be equipped with on negative pole veneer (2) with second grafting recess (21) that first grafting recess (11) position corresponds, first grafting recess (11) and second grafting recess (21) form spliced eye (3), patrol and examine contact pin (100) peg graft in spliced eye (3), first grafting recess (11) with be equipped with pin hole (111) on one in second grafting recess (21), the pin end of patrolling and examining contact pin (100) is worn out pin hole (111) set up, and will the pin end riveting in pin hole (111) department.

2. The bipolar plate of claim 1, wherein the edge of the anode single plate (1) is provided with the first insertion groove (11), and the edge of the cathode single plate (2) is provided with the second insertion groove (21) corresponding to the first insertion groove (11).

3. The bipolar plate of claim 1, wherein the first insertion groove (11) extends from the edge of the anode single plate (1), and the second insertion groove (21) corresponding to the first insertion groove (11) extends from the edge of the cathode single plate (2).

4. A bipolar plate as claimed in any one of claims 1 to 3, wherein the terminal ends form rivet joints (200) at the terminal holes (111), the rivet joints (200) are located outside the insertion holes (3), and the size of the rivet joints (200) is larger than the size of the terminal holes (111).

5. A bipolar plate according to claim 1, wherein the routing pin (100) abuts against the inner wall of the insertion hole (3).

6. A bipolar plate according to any one of claims 1 to 3, wherein the cross-sectional area of the plug hole (3) is circular or rectangular.

7. A bipolar plate according to any one of claims 1 to 3, wherein the lead holes (111) have a circular, oval or rectangular shape.

8. A fuel cell comprising the bipolar plate according to any one of claims 1 to 7.

9. The fuel cell according to claim 8, wherein the bipolar plate is provided in plurality, and a plurality of the bipolar plates are stacked in a current flowing direction.

10. A vehicle characterized by comprising the fuel cell according to any one of claims 8 to 9.