CN2854819Y

CN2854819Y - Sealing device of proton exchange film fuel cell

Info

Publication number: CN2854819Y
Application number: CNU2005200936338U
Authority: CN
Inventors: 阳贻华; 孙佰文; 李丹; 藏振明
Original assignee: DALIAN XINYUAN POWER Co Ltd
Current assignee: DALIAN XINYUAN POWER Co Ltd
Priority date: 2005-11-16
Filing date: 2005-11-16
Publication date: 2007-01-03
Anticipated expiration: 2015-11-16

Abstract

The utility model relates to a proton exchange membrane fuel cell, in particular to a seal member structure of proton exchange membrane fuel cell, which comprises middle annular hard skeleton wrapped by soft colloid. The utility model has the advantages of greatly improved effective area of bipolar plate, enlarged effective area of membrane electrode, and greatly improved volumetric specific power and gravimetric specific power due to the improved effective area of bipolar plate. In comparison with existing technology, the utility model has the advantages of reliable seal, simple structure, good process property, greatly simplified assembling process of battery, and suitability for batch production.

Description

The seal of one proton exchanging film fuel battery

Technical field

The utility model relates to Proton Exchange Membrane Fuel Cells, is the seal configuration of a proton exchanging film fuel battery specifically.

Background technology

The Proton Exchange Membrane Fuel Cells power density is big, compact conformation, and environmental friendliness can be widely used in fields such as communications and transportation, portable power supplies and dispersion generating.But the single battery voltage that has only a pair of anodic-cathodic to constitute is very low, has only 0.6～0.8V, can not satisfy the voltage needs of practical application, therefore, and need be a plurality of monocells formation battery pile that is together in series, to obtain the needed voltage of practical application.(as shown in Figure 1) such as seals that the basic composition of battery pile comprises membrane electrode, bipolar plates and prevents gas leakage and go here and there mutually.Traditional seal mainly is to be made by silicon rubber, and its shore hardness is 35 ~ 45%.Because this traditional seal is very soft, also very thin, for it is fixed on bipolar plates on sealing station on, just need on bipolar plates, be provided with the spacing groove of seal, as shown in Figure 2.This seal very big a part of area of bipolar plates that will account for has reduced the utilance of bipolar plates, thereby has reduced the volumetric specific power of fuel cell pack.On the other hand, this conventional seals part is very soft, is difficult to fix, and therefore, has increased the workload of assembled battery heap.

The utility model content

The purpose of this utility model is to provide a kind of seal of the Proton Exchange Membrane Fuel Cells that is easy to fix, and what it can significantly improve bipolar plates effectively utilizes area.

For achieving the above object, the technical solution adopted in the utility model is:

The seal of one proton exchanging film fuel battery is made of the annular hard skeleton of centre and the soft colloid of its outer coating.

The sidewall of described seal is provided with the hole that fluid passes through; Described hard skeleton is that metal maybe can bear side's ring or the annulus that the nonmetallic materials of temperature of fuel cell are made; Metal material can be stainless steel, aluminium or titanium etc.; Nonmetallic materials can be ABS, PET or PC etc.; Soft colloid can be silicon rubber or Ethylene Propylene Terpolymer etc.; The thickness of hard skeleton is generally 0.1～0.2mm, and width is 2～3mm; The coating thickness of soft colloid is generally 0.2～0.3mm.

The utlity model has following advantage:

1. what the utility model had significantly improved bipolar plates effectively utilizes area, and has enlarged the effective area of membrane electrode; Because the raising of bipolar plates effective area makes volume of battery specific power and quality all be significantly increased than power.

2. the utility model elastic gel hermetically-sealed construction of having a skeleton has limit effect preferably, has guaranteed respectively to save the stressed uniformity of monocell.

3. compared with prior art, it is reliable, simple in structure to the utlity model has sealing, and good manufacturability has been simplified the packaging technology of battery greatly, helps advantages such as batch process.

Description of drawings

Fig. 1 is the building block schematic diagram of battery pile;

Fig. 2 is the electrode plate structure end view of prior art battery pile;

Fig. 3 is the utility model seal configuration schematic diagram;

Fig. 4 is a conventional seals part bipolar plates utilance schematic diagram;

Fig. 5 is the utility model seal bipolar plates utilance schematic diagram.

Among the figure: 1 is bipolar plates, and 2 is membrane electrode, and 3 is seal, and 4 are sealing limit plate, and 5 is hard skeleton, and 6 is soft colloid, and 7 is the sealing ring limitting casing, and 8 are membrane electrode reaction size, and 9 is pole plate I, and 10 is pole plate II.

Embodiment

As shown in Figure 3, the utility model seal is to be made of hard skeleton 5 and soft colloid 6, and hard skeleton 5 is in the centre, and soft colloid 6 newspapers apply the outside at hard skeleton, and 5 of hard skeletons strengthen and position-limiting action, and soft colloid 6 seals; Hard skeleton can be a metal, as stainless steel, aluminium and titanium etc., also can be can bear temperature of fuel cell nonmetal, as ABS, PET and PC etc.; Soft colloid can be silicon rubber, Ethylene Propylene Terpolymer etc.; The thickness of hard skeleton is 0.1～0.2mm, and width is 2～3mm; It is 0.2～0.3mm that the newspaper of soft colloid applies thickness.

Fig. 4 is the bipolar plates with identical overall dimensions with Fig. 5, the bipolar plates utilance when adopting the conventional seals part respectively and adopting the utility model seal, and adopting conventional seals part, the area utilization of bipolar plates as can be known by calculating is 65.95%; Adopting the area utilization of the utility model bipolar plates is 75.98%, therefore adopts the utility model can improve the area utilization 10.03% of bipolar plates.

Claims

1. the seal of a proton exchanging film fuel battery is characterized in that: by annular hard skeleton (5) and its outer soft colloid (6) formation that coats of centre.

2. according to the seal of the described Proton Exchange Membrane Fuel Cells of claim 1, it is characterized in that: the sidewall of described seal is provided with the hole that fluid passes through.

3. according to the seal of the described Proton Exchange Membrane Fuel Cells of claim 1, it is characterized in that: described hard skeleton is that metal maybe can bear side's ring or the annulus that the nonmetallic materials of temperature of fuel cell are made.

4. according to the seal of the described Proton Exchange Membrane Fuel Cells of claim 1, it is characterized in that: described soft colloid is silicon rubber or Ethylene Propylene Terpolymer.

5. according to the seal of the described Proton Exchange Membrane Fuel Cells of claim 1, it is characterized in that: the thickness of described hard skeleton is 0.1～0.2mm, and width is 2～3mm; It is 0.2～0.3mm that the newspaper of soft colloid applies thickness.