CN220963408U - Integrated gas distributor for fuel cell - Google Patents

Abstract

The utility model belongs to the technical field of fuel cell design and manufacture, and in particular relates to an integrated gas distributor for a fuel cell, which comprises the following components: the utility model relates to a fuel cell end plate and two gas distributor bodies communicated with a gas inlet channel and a gas outlet channel on the fuel cell end plate, wherein each gas distributor body is provided with a gas inlet end hole and a plurality of gas outlet end holes communicated with the gas inlet end holes, and the plurality of gas outlet end holes are respectively communicated with the corresponding gas inlet channel or the gas outlet channel.

Description

An integrated gas distributor for fuel cells

Technical Field

The utility model belongs to the technical field of fuel cell design and manufacturing, and specifically relates to an integrated gas distributor for a fuel cell.

Background technique

A fuel cell is an electrochemical conversion device that converts the chemical energy in a fuel into direct current. In addition to the fuel cell stack, the fuel cell system also includes a hydrogen supply system, an air supply system, a temperature control system, and an electronic control system. In the hydrogen supply system, hydrogen enters the hydrogen inlet of the fuel cell from the gas storage device through the bottle mouth valve, solenoid valve, pressure reducing valve, and pressure regulating valve, and then enters the hydrogen common channel of the stack, and then enters the anode flow channel through the gas inlet of each single cell anode plate to supply the required hydrogen to the fuel cell single cell. The hydrogen inlet of the fuel cell stack has a variety of cross-sections, including circular cross-sections, rectangular cross-sections, and special-shaped cross-sections. The most common one is the circular cross-section inlet, because it is more convenient to connect, and a standard pipe joint can be selected to connect it. According to the design and calculation requirements, there are single inlet and multi-channel inlet. Among them, multi-channel inlet also means that multiple hydrogen inlets need to be set up on the end plate of the fuel cell stack. Therefore, there are multiple common channels from the pressure regulating valve to the hydrogen supply system, and there are many inlets side by side, many pipes and pipe joints, the whole system is relatively messy, and there are many corresponding accessories, and it will also increase the difficulty of fuel cell sealing. Currently, there are distributors for hydraulic fluid distribution, which can achieve multiple outlets from a single inlet, and then cooperate with the fuel cell end plate to distribute hydrogen to the hydrogen supply common channel through a sealing structure, but there is still the problem of difficult sealing.

Utility Model Content

The purpose of the utility model is to provide an integrated gas distributor for a fuel cell, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an integrated gas distributor for a fuel cell, comprising: a fuel cell end plate and two gas distributor bodies connected to the air inlet channel and the air outlet channel on the fuel cell end plate, each of the gas distributor bodies is provided with an air inlet end hole and a plurality of air outlet end holes connected to the air inlet end hole, and the plurality of air outlet end holes are respectively connected to the corresponding air inlet channel or the air outlet channel.

Preferably, at least one air guide hole penetrates both ends of the fuel cell end plate, and the air inlet channel or the air outlet channel is respectively formed in the air guide holes on the same side.

Preferably, a hollow sealing ring is filled between each of the air outlet holes and the corresponding air guide hole.

Preferably, a gas distribution hole for gas distribution is provided in the gas distributor body, one end of the plurality of gas outlet holes and one gas inlet hole all extend into the gas distribution hole, and a filtering mechanism for filtering the gas is installed in the gas distribution hole.

Preferably, the filtering mechanism comprises a filter cotton column and a blocking piece which are sequentially installed in the air distribution hole, and the blocking piece is detachably installed at the end of the air distribution hole.

Preferably, one end of the blocking member is a rotating portion and the other end is a threaded portion, an end of the air distribution hole is provided with an internal thread, and one end of the threaded portion is screwed into the internal thread.

Preferably, a plurality of fastening bolts are installed on the gas distributor body, and a plurality of threaded holes for accommodating corresponding fastening bolts are provided at both ends of the fuel cell end plate.

Preferably, a plurality of screw connection holes are provided at equal distances on two symmetrical sides of the fuel cell end plate.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The utility model adds a gas distributor body and a fuel cell end plate, and the two-in-one arrangement of the gas distributor body and the fuel cell end plate not only enables a single-inlet air intake to be distributed in multiple ways into the fuel cell within a limited size range, but also reduces the design of additional gas parts and structures to seal the hydrogen between the gas distributor and the end plate.

(2) The utility model adds a filter mechanism in the gas distribution hole, and uses a filter cotton column to filter the gas passing through the gas distribution hole. At the same time, the filter cotton column is easy to replace through a blocking piece.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a top view of the utility model;

FIG2 is a top view of the fuel cell end plate of the utility model;

FIG3 is a schematic diagram of the cooperation between the gas distributor body and the fuel cell end plate of the utility model;

In the figure: 1. fuel cell end plate; 2. screw connection hole; 3. fastening bolt; 4. gas distributor body; 5. air inlet hole; 6. sealing piece; 7. threaded hole; 8. air guide hole; 9. air outlet hole; 10. filter cotton column; 11. rotating part; 12. threaded part; 13. internal thread; 14. air distribution hole; 15. sealing ring.

Detailed ways

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Referring to Figure 2, the utility model provides an integrated gas distributor for a fuel cell, comprising: a fuel cell end plate 1 and two gas distributor bodies 4 connected to the air inlet channel and the air outlet channel on the fuel cell end plate 1, each gas distributor body 4 is provided with an air inlet end hole 5 and a plurality of air outlet end holes 9 connected to the air inlet end hole 5, and the plurality of air outlet end holes 9 are respectively connected to the corresponding air inlet channel or the air outlet channel.

In the present invention, as shown in FIG. 2-3 , at least one air guide hole 8 is passed through both ends of the fuel cell end plate 1 of the present embodiment, and an air inlet channel or an air outlet channel is respectively formed in the air guide hole 8 on the same side.

As mentioned above, when using the fuel cell end plate 1 and the gas distributor body 4 provided by the utility model, when the gas distributor body 4 is installed on the fuel cell body, the gas outlet end hole 9 on the gas distributor body 4 is connected to the gas guide hole 8 on the fuel cell end plate 1 in a corresponding manner, so that the gas distributor body 4 and the fuel cell end plate 1 are combined into one, which not only enables the single-inlet air intake to perform multi-path gas distribution into the interior of the fuel cell within a limited size range, but also reduces the design of additional gas parts and structures for sealing the hydrogen between the gas distributor and the end plate.

The principle adopted by the utility model is to use as few parts as possible to achieve the same function, improve the reliability of the parts, and avoid the more difficult sealing problem. If the common channel for hydrogen supply to the fuel cell stack is multi-channel, the anode plate needs to be designed with multiple air inlets, and the end plate also needs to have multiple air inlets. If the size of the end plate itself is limited, the distance between the air inlets will be small, and there will not be enough operating space for installing the pipe joints separately. When encountering this problem, one consideration is to design a special gas distributor. The distributor adopts a one-inlet and multiple-outlet structure to solve the problem of insufficient space for the pipe joints. However, because the gas distributor is added, there will be a corresponding reliable connection between the gas distributor and the end plate, and the multiple outlets of the gas distributor are reliably connected to the corresponding number of air inlets on the end plate, and a sealing structure is designed to ensure that hydrogen cannot leak. A possible method is to add corresponding seals and design corresponding structures. These will make the design of the fuel cell more complicated. The present invention will not adopt the above solution, but will combine the structural characteristics of the gas distributor and the hydrogen plate with multiple gas inlets, and propose a design idea that combines the advantages of the two, combining the gas distributor and the fuel cell end plate 1 into one, and through the consideration of the processing technology, it can realize a single inlet and redistribute the gas through the internal structure at the same time to the required fuel cell stack multiple inlets to input hydrogen into the fuel cell common channel, and realize the reliability of hydrogen supply. At the same time, consider gas distribution from the hydrogen tank into the end plate multiple holes.

Furthermore, in order to install the gas distributor body 4 on the fuel cell end plate 1, as shown in Figure 1, a plurality of fastening bolts 3 are also installed on the gas distributor body 4, and a plurality of threaded holes 7 for accommodating the corresponding fastening bolts 3 are provided at both ends of the fuel cell end plate 1. When the gas distributor body 4 is installed on the fuel cell end plate 1, the fastening bolts 3 are located on the outside of the corresponding threaded holes 7. The fastening bolts 3 are tightened so that one end of the fastening bolts 3 is screwed into the corresponding threaded hole 7 to prevent the gas distributor body 4 from detaching from the fuel cell end plate 1.

Furthermore, in order to install the fuel cell end plate 1 on the fuel cell, as shown in Figure 2, a plurality of screw connection holes 2 are symmetrically provided on both sides of the fuel cell end plate 1 at equal distances. When the fuel cell is placed at the installation position on the fuel cell, the screws are fastened to the fuel cell through the corresponding screw connection holes 2.

In the present invention, as shown in FIG. 3 , a hollow sealing ring 15 is filled between each air outlet hole 9 and the corresponding air guide hole 8 of the present embodiment.

As mentioned above, when using the sealing ring 15 provided by the utility model, before the gas distributor body 4 is installed on the fuel cell end plate 1, multiple sealing rings 15 are placed in the corresponding gas guide holes 8 in sequence. When the gas distributor body 4 is installed on the fuel cell end plate 1, each sealing ring 15 is respectively in the corresponding gas outlet hole 9. The sealing ring 15 is pressurized and filled in the gap in the corresponding gas outlet hole 9 and the gas guide hole 8 to avoid leakage between the gas distributor body 4 and the fuel cell end plate 1.

In the utility model, as shown in FIG. 3 , a gas distribution hole 14 for gas distribution is provided in the gas distributor body 4 of the present embodiment, a plurality of gas outlet holes 9 and one end of an gas inlet hole 5 extend into the gas distribution hole 14 , and a filtering mechanism for filtering the gas is installed in the gas distribution hole 14 .

As shown in FIG. 3 , the filter mechanism includes a filter cotton column 10 and a blocking member 6 which are sequentially installed in the air distribution hole 14 , and the blocking member 6 is detachably installed at the end of the air distribution hole 14 .

As shown in FIG. 3 , one end of the blocking member 6 is a rotating portion 11 and the other end is a threaded portion 12 . An end of the air distribution hole 14 is provided with an internal thread 13 , and one end of the threaded portion 12 is screwed into the internal thread 13 .

As mentioned above, when using the gas distribution hole 14 and the filtering mechanism provided by the utility model, when the blocking member 6 is installed in the gas distribution hole 14, the gas distribution hole 14 forms a sealed gas storage space, and the gas introduced into the gas distributor body 4 through the gas inlet end hole 5 is conveniently distributed in the multiple gas outlet end holes 9 through the gas storage space, and the gas is conveniently evenly ventilated to the fuel cell through the multiple gas outlet end holes 9. The rotating part 11 can drive the threaded part 12 to rotate in the internal thread 13 in the gas distribution hole 14, so as to facilitate the blocking of the gas distribution hole 14, and the gas in the gas distribution hole 14 is filtered by the filter cotton column 10.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. An integrated gas distributor for a fuel cell, characterized in that it comprises: a fuel cell end plate (1) and two gas distributor bodies (4) connected to an air inlet channel and an air outlet channel on the fuel cell end plate (1), each of the gas distributor bodies (4) being provided with an air inlet end hole (5) and a plurality of air outlet end holes (9) connected to the air inlet end hole (5), and the plurality of air outlet end holes (9) being respectively connected to corresponding air inlet channels or air outlet channels. 2. An integrated gas distributor for a fuel cell according to claim 1, characterized in that: both ends of the fuel cell end plate (1) are penetrated by at least one air guide hole (8), and the air inlet channel or the air outlet channel is respectively formed in the air guide hole (8) on the same side. 3. An integrated gas distributor for a fuel cell according to claim 2, characterized in that a hollow sealing ring (15) is filled between each of the gas outlet holes (9) and the corresponding gas guide holes (8). 4. An integrated gas distributor for a fuel cell according to claim 2, characterized in that: a gas distribution hole (14) for gas distribution is opened in the gas distributor body (4), one end of the plurality of gas outlet holes (9) and one gas inlet hole (5) all extend into the gas distribution hole (14), and a filtering mechanism for filtering the gas is installed in the gas distribution hole (14). 5. An integrated gas distributor for a fuel cell according to claim 4, characterized in that the filtering mechanism comprises a filter cotton column (10) and a plugging member (6) which are sequentially installed in the gas distribution hole (14), and the plugging member (6) is detachably installed at the end of the gas distribution hole (14). 6. An integrated gas distributor for a fuel cell according to claim 5, characterized in that one end of the sealing member (6) is a rotating portion (11) and the other end is a threaded portion (12), an end of the gas distribution hole (14) is provided with an internal thread (13), and one end of the threaded portion (12) is screwed into the internal thread (13). 7. An integrated gas distributor for a fuel cell according to claim 1, characterized in that: a plurality of fastening bolts (3) are also installed on the gas distributor body (4), and a plurality of threaded holes (7) for accommodating corresponding fastening bolts (3) are provided at both ends of the fuel cell end plate (1). 8. An integrated gas distributor for a fuel cell according to claim 1, characterized in that: a plurality of screw connection holes (2) are provided at equal distances on two symmetrical sides of the fuel cell end plate (1).