CN210403915U

CN210403915U - Stacking, bonding and grouping of proton exchange membrane fuel cell

Info

Publication number: CN210403915U
Application number: CN201921573288.6U
Authority: CN
Inventors: 付宇; 傅云峰
Original assignee: Shanghai Jiyi Hydrogen Energy Technology Co ltd
Current assignee: Shanghai Jiyi Hydrogen Energy Technology Co ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-04-24
Anticipated expiration: 2029-09-20

Abstract

The proton exchange membrane fuel cell is stacked, adhered and grouped, a few cells are grouped into at least two cell group units (1) which are overlapped and adhered, and the cell group units (1) are formed by overlapping cathode plates and anode plates of bipolar plates (12) through sealing gaskets (13) and adhering membrane electrodes (11). The stack is assembled by adopting the battery packs, the battery elements are mutually adhered, and then the battery packs are grouped according to the preset battery packs, so that the stacking time is shortened, the stacking success rate is improved, the battery quality is ensured, the operation difficulty is reduced, and the method is particularly suitable for assembling the metal bipolar plate stack of the proton exchange membrane fuel cell.

Description

Stacking, bonding and grouping of proton exchange membrane fuel cell

Technical Field

The utility model relates to a proton exchange membrane fuel cell pile device's institutional advancement technique, especially proton exchange membrane fuel cell pile-up bonding marshalling.

Background

A Proton Exchange Membrane Fuel Cell (PEMFC) is an electrochemical converter which directly converts chemical energy in fuel and oxidant into electric energy, wherein the anode of the PEMFC is fed with hydrogen as fuel, the cathode is fed with air, and oxygen in the air is used as reaction gas of the cathode. The proton exchange membrane fuel cell mainly forms a core component which is a galvanic pile, the galvanic pile comprises a membrane electrode and a bipolar plate, the galvanic pile is a main part forming the volume and the weight of the PEMFC, and the proton exchange membrane fuel cell has the important functions of unique gas resistance, current collection and gas distribution.

The bipolar plate of the proton exchange membrane fuel cell consists of a cathode plate and an anode plate, the bipolar plate is combined with a membrane electrode device, a cathode cavity and an anode cavity are formed between the bipolar plate and the membrane electrode, and the cathode plate and the anode plate or the cathode plate and the anode plate are overlapped to form a coolant cavity. The proton exchange membrane fuel cell is formed by combining a single or multiple bipolar plates and a membrane electrode, oxygen or air is introduced into a cathode cavity, hydrogen is introduced into an anode cavity, the fuel cell reaction is carried out on the membrane electrode to output electric energy, and water is introduced into a coolant cavity to carry out heat management on the cell.

The conventional method for assembling the proton exchange membrane fuel cell stack is to stack three elements of a bipolar plate, a sealing gasket and a membrane electrode assembly in sequence, when the cell is assembled, the bipolar plate, the sealing gasket and the membrane electrode assembly are installed through a positioning device, the bipolar plate, the sealing gasket and the positioning device are mutually independent, the processing precision of the positioning device influences the accuracy of the relative position of each element, dislocation and slippage are caused during assembly, the stack assembly failure is possibly caused, in addition, the cell elements are stacked one by one in sequence, after a certain number of the cell elements are reached, the alignment of the stack assembly is caused due to accumulated deviation, the number of stacked layers of the cell is large, the cell elements are relatively independent, the positioning device is relatively long, and when the stack applies assembly force, the positioning device is easy to deform, so that the inside of the stack is extruded, local stress and deformation are caused, and.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a proton exchange membrane fuel cell piles up the bonding marshalling, solves above technical problem, improves the installation effectiveness, guarantees that the battery performance reaches the settlement standard.

The purpose of the utility model is realized by the following technical measures: the minority of batteries are grouped into at least two battery pack units which are formed by overlapping and bonding, and the battery pack units are formed by overlapping the negative plates and the positive plates of the bipolar plates through sealing gaskets and bonding membrane electrodes.

In particular, a membrane electrode is bonded between the two battery cells.

Particularly, the opposite corners of the membrane electrode and the bipolar plate are respectively provided with a positioning structure, and the membrane electrode and the bipolar plate are fixed in an alignment way through the positioning structures.

Particularly, end plates are respectively arranged on the end surfaces of two sides of a few battery groups.

In particular, sealing gaskets are respectively adhered to two sides of the membrane electrode.

Particularly, the positioning structure is a matching structure of a positioning hole and a positioning rod; namely, the same parts on the diagonal lines of the membrane electrode, the bipolar plate, the sealing gasket 13 and the end plate are provided with positioning holes.

In particular, the positioning structure is a convex-concave positioning structure, one surface of the convex-concave positioning structure is a convex block, and the reverse surface of the convex-concave positioning structure is a groove.

The utility model discloses an advantage and effect: the stack is assembled by adopting the battery pack, the battery elements are mutually bonded, and then grouped according to the preset battery, so that the stacking time is shortened, the stacking success rate is improved, the battery quality is ensured, the operation difficulty is reduced, and the method is particularly suitable for assembling the metal bipolar plate stack of the proton exchange membrane fuel cell.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic view of a membrane electrode mounting structure in embodiment 1 of the present invention.

The reference numerals include:

the unit cell comprises a cell pack unit 1, a membrane electrode 11, a bipolar plate 12, a sealing gasket 13, a positioning structure 14 and an end plate 15.

Detailed Description

The principle of the utility model lies in that when the galvanic pile is assembled, if the bipolar plate 12, the sealing gasket 13 and the membrane electrode 11 are in free state, the elements are difficult to be fixed only by the positioning structure 14 during the assembly, the assembly is easy to be deviated and slide, and the adjustment is difficult after the sliding, and the success rate of the assembly is low; the bipolar plate 12, the sealing gasket 13 and the membrane electrode 11 are firstly bonded and assembled into the battery pack unit 1 by the battery element through the shorter positioning structure 14, at least two battery pack units 1 are bonded together to form a few battery pack groups, and then the at least two battery pack groups are assembled into the stack, so that the bipolar plate 12, the sealing gasket 13 and the membrane electrode 11 can be accurately positioned, the sealing is ensured, and the stack assembly success rate is improved.

The present invention will be further explained with reference to the drawings and examples.

Example 1: as shown in figure 1, a few battery groups are formed by overlapping and bonding at least two battery pack units 1, and the battery pack units 1 are formed by overlapping and bonding membrane electrodes 11 between a cathode plate and an anode plate of a bipolar plate 12 through sealing gaskets 13.

In the foregoing, the membrane electrode 11 is bonded between the two battery cells 1.

In the foregoing, the opposite corners of the membrane electrode 11 and the bipolar plate 12 are respectively provided with a positioning structure 14, and the membrane electrode 11 and the bipolar plate 12 are fixed in alignment by the positioning structure 14.

In the foregoing, the end plates 15 are respectively mounted on both side end surfaces of the small number of battery groups.

In the foregoing, gaskets 13 are bonded to both sides of the membrane electrode 11.

In the foregoing, the positioning structure 14 is a matching structure of a positioning hole and a positioning rod; namely, the membrane electrode 11, the bipolar plate 12, the sealing gasket 13 and the end plate 15 are provided with positioning holes at the same positions on the diagonal line, and the positioning rods penetrate through the positioning holes to be fixed during assembly. Or, the positioning structure 14 is a convex-concave positioning structure, one surface is a bump, and the reverse surface is a groove; when the two adjacent elements are overlapped in installation, the positioning structures 14 corresponding to the parts are mutually embedded, pressed, aligned and fixed by the convex-concave positioning structures.

In the embodiment of the utility model, the gap between the two adjacent bipolar plates 12 is not more than 0.1 mm; the dispensing thickness among the membrane electrode 11, the bipolar plate 12 and the sealing gasket 13 is controlled within 0.05 mm; the glue used for dispensing adopts normal temperature curing glue, and liquid silicon rubber is preferred; the battery pack units 1 are connected by membrane electrodes, and when a stack is assembled, a few battery pack groups are connected by the membrane electrodes 11.

In the embodiment of the present invention, the grouping of the battery packs includes assembling 5-20 battery packs 1, preferably 10 battery packs 1. Too many groups are not suitable, and too many groups cause positioning difficulty.

In the embodiment of the utility model provides an in, a few battery packs marshalling adopt end plate 15 concora crush, and end plate 15 roughness is unanimous with bipolar plate 12 machining precision, and end plate 15 weight is at 20-30kg, preferred 30 kg.

In an embodiment of the present invention, a method for assembling a pem fuel cell stack and a stack includes the following steps:

A. a membrane electrode 11 bonding sealing template is prefabricated according to the specification of a cathode plate sealing groove and an anode plate sealing groove of a bipolar plate 12, the sealing grooves of the cathode plate and the anode plate of the bipolar plate 12 are in mirror image structures, a cathode sealing gasket and an anode sealing gasket are respectively bonded on two side faces of the membrane electrode 11 and are shaped, as shown in figure 2, a positioning structure 14 is respectively arranged on two corners of a diagonal line on the bonding shaped membrane electrode 11, a sealing gasket 13 is respectively bonded on the middle part of each side face of the membrane electrode 11, then a glue dispensing machine robot program is set, glue is dispensed on the cathode plate sealing groove and the anode plate sealing groove of the bipolar plate 12, the membrane electrode 11 bonded with the sealing gasket 13 is placed in the cathode plate sealing groove and the anode plate sealing groove of the bipolar plate 12 after glue dispensing is finished, and.

B. Further, glue is dispensed on the upper surfaces of at least two battery pack units 1 by using a glue dispenser robot, the battery pack units continue to pass through the positioning structure 14, and the processes are repeated to assemble 5-20 battery pack units 1 into a small number of battery groups.

C. Furthermore, in order to enhance the flatness of the assembled battery, after the assembled battery pack is assembled, the end plates 15 with certain flat weight are used for pressing the end surfaces of the two sides of the grouped few batteries, and after the bonding glue is solidified, the battery pack is taken down and properly packaged. And when the galvanic pile is assembled, sequentially assembling the small battery groups according to the stacking sequence to obtain the galvanic pile.

In the embodiments of the present invention, the above embodiments are only exemplary embodiments of the present invention, so as to better enable those skilled in the art to understand the present invention, and the above description should not be interpreted as a limitation to the protection scope of the present patent application; the technical solution of the present invention is to provide a new and improved method for manufacturing a semiconductor device.

Claims

1. The proton exchange membrane fuel cell stacking, bonding and grouping is characterized in that a minority of cells are grouped into at least two cell group units (1) which are stacked and bonded, and each cell group unit (1) is formed by stacking cathode plates and anode plates of bipolar plates (12) through bonding membrane electrodes (11) by sealing gaskets (13).

2. The PEM fuel cell stack assembly according to claim 1, wherein a membrane electrode (11) is bonded between two cell stack units (1).

3. The PEM fuel cell stack-up bonding grouping according to claim 1, wherein the opposite corners of the membrane electrode (11) and the bipolar plate (12) are respectively provided with a positioning structure (14), and the membrane electrode (11) and the bipolar plate (12) are fixed in alignment by the positioning structures (14).

4. The PEM fuel cell stack-bonding group according to claim 1, wherein end plates (15) are respectively mounted on both side end faces of the group of the minority cells.

5. The PEM fuel cell stack-bonding grouping according to claim 1 wherein the membrane electrode (11) is bonded on both sides with gaskets (13), respectively.

6. The PEMFC stacking, bonding and grouping method according to claim 1, wherein the positioning structure (14) is a positioning hole and positioning rod matching structure; namely, the same positions on the diagonal lines of the membrane electrode (11), the bipolar plate (12), the sealing gasket (13) and the end plate (15) are provided with positioning holes.

7. The pem fuel cell stack-bonding grouping of claim 1, wherein the locating structures (14) are male and female locating structures, one surface being a protrusion and the opposite surface being a groove.