CN105655609A

CN105655609A - Internal positioning structure used for assembly of fuel cell electric pile

Info

Publication number: CN105655609A
Application number: CN201410696803.5A
Authority: CN
Inventors: 耿江涛; 陈中岩; 洪有陆; 侯明; 邵志刚
Original assignee: Dalian Institute of Chemical Physics of CAS
Current assignee: Dalian Institute of Chemical Physics of CAS
Priority date: 2014-11-26
Filing date: 2014-11-26
Publication date: 2016-06-08

Abstract

The invention relates to an internal positioning structure used for assembly of a fuel cell electric pile and used for accurate positioning of various components in an assembly process of the electric pile. The internal positioning structure is relatively convenient to both install and disassemble, does not need repeated plugging in the fuel cell electric pile assembly or maintenance process, improves the electric pile assembly efficiency and also reduces the wear of a positioning rod.

Description

A kind of internal positioning structure for fuel cell pile assembling

Technical field

The present invention relates to fuel cell field, particularly relate to fuel cell pile assembly method.

Background technology

Fuel cell is a kind of TRT that fuel and the chemical energy in oxidant are directly and efficiently converted into electric energy by the electrocatalytic reaction on membrane electrode. More piece fuel cell list pond is assembled together with pressure filter mode superposition and forms fuel cell pile (or being called " set of cells ").

In fuel cell pile assembling process, typically require use positioner by member align such as the membrane electrode assembly (MEA) within pile, sealing member, bipolar plates and end plates, occur without relative displacement, thus forming the public duct for reacting gas or cooling medium flowing and distribution of smoother. If without positioner or position inaccurate, during pile assembling, each parts easily misplace, and cause poorly sealed, and gas blowby, gas leak phenomenon occurs in pile, and pile internal-response gas is also uneven with cooling medium distribution, and pile will be unable to normal operation. Therefore the quality of fuel cell pile, the location in pile assembling plays a crucial role.

The location of fuel cell pile mainly has two kinds: inner position and outside fix (CN17255A, CN1787263A, CN1750303A). Inner position is normally used is whole location bar, and bar is grown up in pile its length, and pile needs after having assembled to take out inner position bar. Additionally, in the successful fuel cell pile of first assembling, each single pond or other parts are likely not to have and reach designing technique index, or some component capabilities decays, even breaks down after pile uses a period of time, need to disassemble whole fuel cell pile, replace single pond or the parts of quality time, ressemble. This assembling repeatedly needs repeatedly to insert, take out inner position bar, wastes valuable time, energy, and Reusability causes inner position bar serious wear, being accurately positioned when impact uses next time.

Summary of the invention

It is contemplated that overcome the shortcoming and defect of above-mentioned prior art, it is provided that a kind of internal positioning structure for fuel cell pile assembling, for fuel cell each parts being accurately positioned in assembling process, it is described in detail as follows:

A kind of internal positioning structure for fuel cell pile assembling, is made up of multiple location joint. Joint one end, described location is projective structure, other end recessed structures, and projective structure can be completely embedded into recessed structures, and multiple location joint may make up location bar one section longer after connecting.

Described location joint can be inserted in hole, fuel cell pile location, and its cross sectional shape is identical with location hole shape, it is possible to is circular or polygon.

Described location joint length is 1��100mm, it is preferable that length is fuel cell list pond thickness.

The projective structure of described location joint is identical with recessed structures cross sectional shape, it is possible to be circular or polygon.

The projective structure of described location joint is smooth or with corresponding screw thread with recessed structures surface.

Described location material-saving matter is high-strength non-metallic or metal, and when using metal location to save, near the reply each positioning parts hole of fuel cell, conducting position does insulation processing, it is prevented that each parts are by positioning joint formation electronics path.

Using internal positioning structure of the present invention to carry out in pile assembling process, location joint can inserted in the hole, location no less than 1, then place each parts of fuel cell again; After pile has assembled, location joint does not take out, and stays inside pile; Pile directly can be taken apart at trouble location when needing repairing or change parts, it is not necessary to again insertable into location joint.

It is to be noted, in assembling process, it is highly continually changing fuel cell pile: pile compaction process camber is gradually reduced, disassemble the reduction of pile inner resilient members pressure, stack height in process to be gradually increased, it is thus desirable to suitably remove or increase the quantity of inner position joint, normally assemble not affecting pile.

Advantages of the present invention:

Internal positioning structure of the present invention is installed, dismounting is all more convenient, need not repeatedly plug, improve pile efficiency of assembling, can reduce again the abrasion of location bar simultaneously in fuel cell pile assembling or maintenance process.

Accompanying drawing explanation

Inner position joint front view in Fig. 1 embodiment;

Inner position joint side view in Fig. 2 embodiment;

Interior 5 location joint attachment structure schematic diagrams in Fig. 3 embodiment;

Fig. 4 embodiment is provided with the fuel cell pile schematic diagram of location joint.

Detailed description of the invention

The purpose of the present invention, feature and effect is understood, by following specific embodiment, to elaborate of the present invention for making to be familiar with these those skilled in the art.

Embodiment:

In the present embodiment, fuel cell pile totally 100 joint, employs internal positioning structure of the present invention. Inner position joint is politef material, and length is about 5mm for single pond thickness, and front view is as shown in Figure 1. Location joint is cylinder, and one end is bulge-structure, and one end is recessed structures, and protruding, recessed structures cross section is circle, and Fig. 2 is location joint side view. Multiple location joint embeds mutually connection, constitutes an entirety, as shown in Figure 3.

Fig. 4 is 100 joint fuel cell pile (10) structural representations using location joint. In Fig. 4, pile is made up of first, second end plate (1a, 1b), first, second collector plate (2a, 2b), bipolar plates 3, membrane electrode assembly 4 and location joint 5. Totally two groups of location joint in Fig. 4, it is all entirely embedded in the hole, location of the pile parts such as end plate, collector plate, bipolar plates, membrane electrode assembly (hole, location is positioned at each parts diagonal angle), so that each parts are accurately positioned, without relative movement, it is ensured that fuel cell pile performance.

Pile because of certain unit failure need to disassemble time, it is not necessary to additionally insert inner position bar again, can directly open from trouble location, as shown in Figure 4, due to the existence of inner position joint, other normal battery is still held in place putting relatively, do not misplace, improve and again assemble successful probability.

Claims

1. the internal positioning structure for fuel cell pile assembling, it is characterised in that: saved by the location of more than 2 and form;Described location joint is column, and a side end face of column is provided with a projective structure, opposite side end face is provided with a recessed structures, and projective structure can be completely embedded in recessed structures, and the location joint of more than 2 constitutes the location bar of a segment length after being connected in series in successively.

2. internal positioning structure according to claim 1, it is characterised in that: described location joint inserts when pile assembles in hole, fuel cell pile location, and its radial cross-sectional shape is identical with location hole radial shape and size, it is possible to be circular or polygon.

3. internal positioning structure according to claim 1, it is characterised in that: described location joint axial length is 1��100mm, it is preferable that length is fuel-cell single-cell thickness.

4. the internal positioning structure according to claim 1,2 or 3, it is characterised in that: the projective structure of described location joint is identical with recessed structures radial cross-sectional shape and size, it is possible to be circular or polygon.

5. internal positioning structure according to claim 1, it is characterised in that: projective structure outer surface and the recessed structures inner surface of described location joint is smooth surface or with corresponding thread surface.

6. internal positioning structure according to claim 1, it is characterised in that: described location material-saving matter is high-strength non-metallic or metal; When using metal location joint, near the reply each positioning parts hole of fuel cell, conducting position does insulation processing, it is prevented that each parts form electronics path by positioning joint.

7. internal positioning structure according to claim 1, it is characterised in that: described projective structure and recessed structures are in the opposite position place of column two side end face.