CN211295268U

CN211295268U - Collector plate of fuel cell stack

Info

Publication number: CN211295268U
Application number: CN202020143459.8U
Authority: CN
Inventors: 程敬德; 赵树钊; 梁鹏; 麦建明; 唐厚闻; 李红涛
Original assignee: Shanghai H Rise New Energy Technology Co Ltd
Current assignee: Shanghai H Rise New Energy Technology Co Ltd
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-08-18
Anticipated expiration: 2030-01-22

Abstract

The utility model relates to a fuel cell electric pile current collector, which comprises a plate body, the plate body includes the first contact site of contacting with the reactor core and the second contact site of being connected with the pencil, first contact site and second contact site cover have the conducting layer, and the plate body coats the insulating layer except that first contact site and second contact site. Compared with the prior art, the partition coating treatment is carried out on the collector plate according to the function of the collector plate, so that the contact resistance between the collector plate and the reactor core is reduced, the corrosion resistance and the electrolysis resistance of the collector plate in the use process are improved, the metal ion pollution phenomenon of a membrane electrode is reduced, and the effective service life of the fuel cell is ensured.

Description

Collector plate of fuel cell stack

Technical Field

The utility model belongs to the technical field of the fuel cell technique and specifically relates to a fuel cell electric pile collector plate is related to.

Background

The proton exchange membrane fuel cell is an electrochemical device which decomposes anode hydrogen into protons and electrons through a catalyst, the protons reach a cathode through a proton exchange membrane, the electrons reach the cathode through an external circuit, and the electrons, the protons and oxygen generate water under the catalysis of a cathode catalyst. The chemical energy released by the chemical reaction between hydrogen and oxygen is released in the form of current and heat generated by the electrons passing through an external circuit, and the final product is only water. The proton exchange membrane fuel cell has the advantages of high efficiency, low temperature, cleanness, environmental protection and the like.

The voltage of a single fuel cell is low, and the prior technical scheme mainly adopts a plurality of cell units which are connected in series to form an electric pile so as to output high voltage for use. The introduction of reactants, the exhaust of tail gas, the circulation of coolant and the like at two sides of the galvanic pile are realized in a mode of a public pipeline, the output of the positive electrode and the negative electrode of the galvanic pile is realized through a current collecting plate, and the galvanic pile is tightly pressed by an outer side end plate to realize the flow field sealing and the current conduction.

The contact of the collector plates with the active area of the flow field requires a large amount of current to be passed and therefore the resistance needs to be kept low. The contact part with the reactant, the tail gas, the coolant and the like needs to be kept insulated, so that the internal leakage and corrosion of the galvanic pile are reduced, and the performance and the service life of the galvanic pile are improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a collector plate of a fuel cell stack.

The purpose of the utility model can be realized through the following technical scheme:

a fuel cell stack current collecting plate comprises a plate body, wherein the plate body comprises a first contact part and a second contact part, the first contact part is in contact with a reactor core, the second contact part is connected with a wire harness, the first contact part and the second contact part are covered with conducting layers, and insulating layers are coated on the parts, except the first contact part and the second contact part, of the plate body.

The insulating layer is a Teflon insulating layer.

The thickness of the insulating layer is 0.08 mm.

And air inlets, a hydrogen inlet, a cooling liquid inlet, an air outlet, a hydrogen outlet and a cooling liquid outlet are arranged on two sides of the plate body.

The air inlet, the hydrogen inlet, the cooling liquid inlet, the air outlet, the hydrogen outlet and the cooling liquid outlet are all in a round-angle through hole structure.

The bending part of the current collecting plate is a round angle.

The conducting layer is a metal conducting layer.

The metal conducting layer is a copper conducting layer.

Compared with the prior art, the utility model has the advantages of it is following:

(1) the first contact part and the second contact part are coated with the conducting layers, the parts of the plate body except the first contact part and the second contact part are coated with the insulating layers, and the current collecting plate is subjected to partition coating treatment according to the function of the current collecting plate, so that the contact resistance of the current collecting plate and a reactor core is reduced, the corrosion resistance and the electrolytic performance of the current collecting plate in the using process are improved, the metal ion pollution phenomenon of a membrane electrode is reduced, and the effective service life of the fuel cell is ensured.

(2) The Teflon insulating layer has low friction coefficient and high self-cleaning performance, and the effective service life of the fuel cell is prolonged.

Drawings

Fig. 1 is a schematic structural view of the present invention;

reference numerals:

1 is a first contact portion; 2 is a second contact portion; 3 is an insulating layer; 4 is an air inlet; 5 is a cooling liquid inlet; 6 is a hydrogen outlet; 7 is a hydrogen inlet; 8 is a cooling liquid outlet; and 9 is an air outlet.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Examples

The embodiment provides a collector plate of a fuel cell stack, which comprises a plate body, wherein the plate body comprises a first contact part 1 which is in contact with a reactor core and a second contact part 2 which is connected with a wire harness, the reactor core is a fuel cell internal reaction region, the first contact part 1 and the second contact part 2 are coated with conducting layers, the parts of the plate body except the first contact part 1 and the second contact part 2 are coated with insulating layers 3, and the conducting layers and the insulating layers 3 are both plated layers; the current collecting plate is subjected to partition coating treatment according to the function of the current collecting plate, so that the contact resistance of the current collecting plate and a reactor core is reduced, the waterproof, corrosion-resistant and electrolytic performances of the current collecting plate in the use process are improved, the metal ion pollution phenomenon of a membrane electrode is reduced, and the effective service life of the fuel cell is ensured.

Specifically, the method comprises the following steps:

the insulating layer 3 is a Teflon insulating layer; has low friction coefficient and high self-cleaning performance, and improves the effective service life of the fuel cell. The thickness of the insulating layer 3 was 0.08 mm. And the two sides of the plate body are provided with an air inlet 4, a hydrogen inlet 7, a cooling liquid inlet 5, an air outlet 9, a hydrogen outlet 6 and a cooling liquid outlet 8. The air inlet 4, the hydrogen inlet 7, the cooling liquid inlet 5, the air outlet 9, the hydrogen outlet 6 and the cooling liquid outlet 8 are all in a round-angle through hole structure. The bending part of the current collecting plate is a round angle. The conductive layer is a metal conductive layer.

In this patent, the fuel cell monoliths are collectively referred to as the core. The plate body can be made of materials with smaller resistivity, such as conductive metal or graphite, and the ohmic heat effect of the collector plate can be reduced, so that the heat generation of the collector plate is reduced, and the short plate effect caused by overlarge heat of two fuel cell single chips connected with the collector plate is avoided. In addition, the second contact part 2 is arranged on one longer edge of the collecting plate, and the structure can also avoid the excessive heat of the collecting plate.

Claims

1. The utility model provides a fuel cell pile current collector, includes the plate body, its characterized in that, the plate body includes first contact site (1) and the second contact site (2) of being connected with the pencil with the reactor core contact, first contact site (1) and second contact site (2) cover and have the conducting layer, and the plate body coats insulating layer (3) except that first contact site (1) and second contact site (2).

2. The fuel cell stack current collector plate according to claim 1, wherein said insulating layer (3) is a teflon insulating layer.

3. The fuel cell stack current collector plate according to claim 1, wherein the thickness of the insulating layer (3) is 0.08 mm.

4. The fuel cell stack current collector plate according to claim 1, wherein the plate body is provided at both sides thereof with an air inlet (4), a hydrogen inlet (7), a coolant inlet (5), an air outlet (9), a hydrogen outlet (6), and a coolant outlet (8).

5. The collector plate according to claim 4, wherein the air inlet (4), the hydrogen inlet (7), the coolant inlet (5), the air outlet (9), the hydrogen outlet (6) and the coolant outlet (8) are all in a round-angle through-hole structure.

6. The current collector plate for a fuel cell stack according to claim 1, wherein the bent portion of the current collector plate is rounded.

7. The fuel cell stack current collector plate according to claim 1, wherein said electrically conductive layer is a metal conductive layer.

8. The collector plate according to claim 7, wherein said metal conductive layer is a copper conductive layer.