CN2879433Y

CN2879433Y - Tunnel type fuel battery bipolar plate

Info

Publication number: CN2879433Y
Application number: CNU2006200693082U
Authority: CN
Inventors: 钱建东; 沈建跃; 曲平; 康新
Original assignee: NANJING BONENG FUEL BATTERY CO Ltd
Current assignee: NANJING BONENG FUEL BATTERY CO Ltd
Priority date: 2006-02-15
Filing date: 2006-02-15
Publication date: 2007-03-14
Anticipated expiration: 2016-02-15

Abstract

The present utility model discloses a tunnel type fuel battery bipolar plate, which includes two upper and lower electrode plate bodies. The surfaces of the two electrode plate bodies are disposed with a guide groove and a guide hole through them. The guide groove and the guide hole are communicated with each other. The periphery of the guide groove and the guide hole is disposed with a sealing ring. The guide groove on the surface of the bipolar plate turns inward in vicinity of the guide hole to pass the sealing ring on the surface and connects to the guide hole at another side of the bipolar plate. The utility model removes the auxiliary support component which chooses strip flat piece as sealing ring to span the guide groove, improves the sealing performance, simplifies the work procedure, and is favor of volume production.

Description

The tunnel type fuel battery double plates

One, technical field

The utility model relates to a kind of fuel cell, the bipolar plates of using on specifically a kind of fuel cell.

Two, background technology

Fuel cell is a kind of device that the chemical energy of hydrogen and oxygen is directly changed into electric energy by electrode reaction.The maximum characteristics of this device are owing to do not relate to burning in the reflection process, therefore its energy conversion efficiency is not subjected to the restriction of " Carnot cycle ", the efficient of the fuel cell of most of type is up to 50%-60%, by second use to waste heat, gross efficiency can be up to 80%-85%, as power source, the 2-3 that its actual efficiency of energy utilization is an ordinary internal combustion engine doubly.Produce to pollute hardly in its course of work, power bracket from several watts to the number megawatts, range of application is very vast.

The type of fuel cell has multiple, the advantage that wherein Proton Exchange Membrane Fuel Cells has low-temperature operation, starts fast, power density is high, be acknowledged as the most promising, energy replace internal combustion engines, storage battery become the ideal power source and the military civilian portable power supplies of electric automobile, and market is very extensive.

The Proton Exchange Membrane Fuel Cells monomer mainly comprises membrane electrode and pole plate.The centre of battery cell is a membrane electrode, is made up of proton exchange membrane and gas diffusion layers, catalyst, and the membrane electrode both sides are pole plates, and the electronics that electrochemical reaction generates can lead to external circuit by pole plate.The pod apertures and the guiding gutter of plate provide hydrogen fuel, and it is oxidant that cathode plate then provides air.Produce hydrogen cation (proton) in anode hydrogen gas through catalytic reaction, proton exchange membrane helps the hydrogen cation to move to negative electrode.Oxygen in cathode air obtains electronics through catalytic reaction and forms anion, the hydrogen cation water generation reaction of coming with migration.In whole electrochemical reaction, the electric current that pole plate is drawn is the generating result of fuel cell just.A plurality of battery cells are connected as required, form the battery pack (pile) of different capacity.In battery pack, the pole plate overlapped in series, its one side is as the anode guide face, and another side can be used as the cathode diversion face of adjacent monomer battery, and this pole plate is called bipolar plates.Also have a kind of bipolar plates to be bonded by two yin, yang pole plates, the cooling launder of air or water is made in middle abutting edge.

Fuel battery double plates is provided with pod apertures, guiding gutter and the sealing ring of the reacting gas that is used to circulate, and after the stack of polylith bipolar plates, the pod apertures of same position just forms a flow-guiding channel, so that the turnover of reacting gas.Guiding gutter then is covered with pole plate and is close to membrane electrode to provide reacting gas to it.Problem is must cross the sealing ring on the bipolar plates when guiding gutter is connected with pod apertures, and on existing bipolar plates, both are processed to directly intersect, and so just make sealing ring lose supporting at this place, cause losing sealing.Existing solution is to build bridge on guiding gutter, promptly serve as interrupted sealing ring supporting across guiding gutter place mat one bar shaped plain film (as stainless steel substrates), this structure is processed complex not only, there is hidden danger in its airtight quality, and the bar shaped plain film is installed is adopted manual finishing, be unfavorable for producing in enormous quantities.

Three, summary of the invention

1, goal of the invention: the purpose of this utility model provides a kind of good seal performance, and has simplified the tunnel type fuel battery double plates of manufacturing procedure.

2, technical scheme: the utility model is to be achieved through the following technical solutions above-mentioned purpose:

A kind of tunnel type fuel battery double plates, comprise two pole plate bodies up and down, be provided with the pod apertures of guiding gutter and two pole plate bodies of perforation on the surface of two pole plate bodies, guiding gutter communicates with pod apertures, periphery in guiding gutter and pod apertures is provided with sealing ring, it is characterized in that guiding gutter on the pole plate body surface is inwardly made a detour near pod apertures crosses its surperficial sealing ring, and is communicated with pod apertures at the another side of pole plate body.

In the work, reacting gas flows along guiding gutter, inwardly make a detour with guiding gutter in the time of near near pod apertures, wear to the reverse side of pole plate body, cross sealing ring at reverse side, communicate with pod apertures more afterwards, adopt this tunnel type structure, removed with the bar shaped plain film and crossed over the auxiliary component of guiding gutter, thereby guaranteed the integrality of sealing ring supporting and the airtight quality of fuel cell as sealing ring.

For the ease of sealing ring location and fixing, can also on the surface of pole plate body, groove be set, sealing ring places in the groove.

Guiding gutter can form passage one to one after inwardly making a detour near the pod apertures, also can merge into a passage.Adopt many passages one to one, under the situation that satisfies the reacting gas circulation, improved the structural strength of pole plate; Adopt a passage then to make processing more convenient.In addition, the cross sectional shape of guiding gutter can be square or semicircle, and the cross sectional shape of passage can be square or circular.

3, beneficial effect: the utility model compared with prior art has the following advantages: it is directly crossing with sealing ring that (1) has changed on original bipolar plates guiding gutter, must adopt the aiding support of bar shaped plain film, remove the cost of parts of this bar shaped plain film as sealing ring leap guiding gutter; (2) guiding gutter crosses sealing ring by turning to from the back side of pole plate body, and the supporting position of sealing ring on the body is not interrupted continuously, has overcome the sealing hidden danger that original metal plain film and sealing ring supporting lap-joint may exist, and has improved sealing property greatly; (3) there is the low problem of product percent of pass in the manual metal plain film of installing in the conventional processes, has then saved this road manufacturing procedure behind employing the utility model, not only helps producing in enormous quantities, and has improved the qualification rate of product.

Four, description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a vertical view of the present utility model.

Five, embodiment

As Fig. 1, shown in Figure 2, a kind of tunnel type fuel battery double plates described in the utility model, comprise two pole plate bodies 1 up and down, be provided with the pod apertures 3 of guiding gutter 2 and two pole plate bodies of perforation on the surface of two pole plate bodies 1, guiding gutter 2 is common to the circulation reacting gas mutually with pod apertures 3, periphery in guiding gutter 2 and pod apertures 3 is provided with sealing ring 4, sealing ring 4 is placed in the body 1 lip-deep groove 5, pole plate body 1 lip-deep guiding gutter 2 is inwardly made a detour near pod apertures 3 and is crossed its surperficial sealing ring 4, and is communicated with pod apertures 3 at the another side of body 1.In order to improve the structural strength of pole plate, near guiding gutter 2 back of inwardly making a detour pod apertures 3 forms one to one that many passages are communicated with it, can certainly only adopt a passage in this example, and it processes more convenient; The cross sectional shape of passage can be square or circular; The cross sectional shape of guiding gutter 2 can be square or semicircle.

Claims

1, a kind of tunnel type fuel battery double plates, comprise two pole plate bodies (1) up and down, be provided with the pod apertures (3) of guiding gutter (2) and two pole plate bodies of perforation on the surface of two pole plate bodies (1), guiding gutter (2) communicates with pod apertures (3), periphery in guiding gutter (2) and pod apertures (3) is provided with sealing ring (4), it is characterized in that the lip-deep guiding gutter of pole plate body (1) (2) is inwardly made a detour near pod apertures (3) crosses its surperficial sealing ring (4), and is communicated with pod apertures (3) at the another side of pole plate body (1).

2, tunnel type fuel battery double plates according to claim 1 is characterized in that sealing ring (4) is placed in the lip-deep groove of pole plate body (1) (5).

3, tunnel type fuel battery double plates according to claim 1 is characterized in that guiding gutter (2) forms one to one passage or merges into a passage after inwardly making a detour near the pod apertures (3).