CN220400645U

CN220400645U - Fuel cell packaging structure

Info

Publication number: CN220400645U
Application number: CN202322016658.9U
Authority: CN
Inventors: 潘杰; 陈婷
Original assignee: JIANGSU YAOYANG NEW ENERGY TECHNOLOGY CO LTD
Current assignee: JIANGSU YAOYANG NEW ENERGY TECHNOLOGY CO LTD
Priority date: 2023-07-30
Filing date: 2023-07-30
Publication date: 2024-01-26
Anticipated expiration: 2033-07-30

Abstract

The utility model discloses a fuel cell packaging structure which comprises a cathode tail plate, a cathode insulating plate, a reactor core fixing strip, a side plate connecting rod, a reactor core, an anode insulating plate, an anode tail plate, a collector plate and a side plate. The cathode tail plate and the anode tail plate are respectively positioned at the cathode and the anode of the reactor core, the current collecting plate is positioned at two side surfaces of the reactor core and is fixed through side plates, and the side plates are fixedly connected with the cathode tail plate and the anode tail plate; the side surface of the pile core, which is not provided with the collecting plate, is fixed through a side plate connecting rod. Through the test of the pile performance, the utility model has good pile air tightness and stability, and the pile performance is not obviously attenuated.

Description

Fuel cell packaging structure

Technical Field

The utility model belongs to a fuel cell packaging technology, and particularly relates to a fuel cell packaging structure.

Background

The use of renewable energy sources to produce hydrogen energy, which is then reused to drive vehicles or other vehicles is an obvious means of carbon reduction. Along with the changing international situation, the hydrogen energy may be an important direction for solving the energy safety of China.

The fuel cell stack mainly comprises seven parts of an end plate, an insulating plate, a current collecting plate, a bipolar plate, a membrane electrode, a fastener and a sealing ring. The main function of the end plates is to control the contact pressure, so that sufficient strength and stiffness are the most important properties of the end plates. The sufficient strength can ensure that the end plate is not damaged under the action of the packaging force, and the sufficient rigidity can enable the end plate to deform more reasonably, so that the packaging load is uniformly transmitted to the sealing layer of the single cell and the MEA. The function of the fastener is mainly to maintain contact pressure between the components of the stack.

The packaging structure of the fuel cell stack in the current industry is mainly provided with a binding belt type and a screw type. The strap-type packaging structure has certain size rebound after the pressure of the press fitting is released. In addition, the metal binding belt is adopted, and the metal binding belt and the pile are small in distance, so that the creepage distance is insufficient, and the problems of insulation and the like are easily caused. The screw type packaging not only occupies precious pile space and reduces the power density of the pile, but also causes a small amount of warping of the end plate due to the fact that the bolt assembly torque is applied to the centers of the four corners and the four sides of the end plate, and uneven contact of components in the pile is caused. The uneven deformation of the end plate and the polar plate causes uneven contact pressure distribution of the MEA, and negative influence is caused on the performance of the cell. If the plate warp and deformation is serious, the sealing effect of the sealing gasket can be affected, and gas leakage is caused.

Disclosure of Invention

The utility model aims to: in order to solve the defects in the prior art, the utility model provides a high-power fuel cell packaging structure.

The technical scheme is as follows: a fuel cell packaging structure comprises a cathode tail plate, a pile core, an anode tail plate, a side plate connecting rod, a current collecting plate and a side plate;

the cathode tail plate and the anode tail plate are respectively positioned at the cathode and the anode of the reactor core, the current collecting plates are positioned at two side surfaces of the reactor core and are fixed through side plates, and the side plates are fixedly connected with the cathode tail plate and the anode tail plate;

the side surface of the pile core, which is not provided with the collecting plate, is fixed through a side plate connecting rod.

Furthermore, a reactor core fixing strip is arranged outside the reactor core of the electric pile.

Further, the side plate is provided with a bending part which bends towards the outer side of the electric pile core at the corner of the electric pile core.

Further, a cathode insulating plate is arranged between the cathode of the electric pile reactor core and the cathode tail plate; an anode insulating plate is arranged between the anode and the anode tail plate of the reactor core.

Further, the side plates are fixed on the anode tailplate and the cathode tailplate through bolts.

Furthermore, the battery packaging structure is provided with an insulating plate between the side plate and the reactor core.

The beneficial effects are that: compared with the prior art, the utility model has the remarkable effects that:

(1) The side plate package not only keeps higher volume power density of the strap package, but also synchronously maintains reasonable insulation distance, and avoids the possibility of insulation failure in the strap package;

(2) The edge of the side plate adopts a 90-degree bending structure, so that the mechanical strength of the side plate is improved;

(3) The two side plates crossing the reactor core of the electric pile are connected by equidistant connecting rods to form a cage structure, so that the strength and the rigidity of the side plates are further improved, and the reliability of the electric pile in vibration and mechanical impact is further improved.

Drawings

FIG. 1 is an overall schematic of a high power fuel cell package structure according to the present utility model;

FIG. 2 is an exploded view of a portion of the structure of the present utility model.

Detailed Description

For a detailed description of the disclosed embodiments of the present utility model, reference is made to the accompanying drawings.

The utility model provides a high-power fuel cell packaging structure, which is characterized in that the power exceeds 100kw and above, the packaging design is mainly carried out on a side plate packaging structure of the high-power fuel cell, and the high-power fuel cell with the core size exceeding 1 meter is required to have enough strength and rigidity so as to cope with severe vibration and mechanical impact in the vehicle-mounted process.

Referring to fig. 1, a fuel cell package structure according to the present utility model includes a cathode tailboard 1, a cathode insulation board 2, a core fixing bar 3, a side plate connecting rod 4, a stack core 5, an anode insulation board 6, an anode tailboard 7, a collector plate 8 and a side plate 9.

First, when the fuel cell is packaged, a preset pressure is applied to the cathode tail plate 1, the cathode insulating plate 2, the collector plate 8, the stack core 5, the anode insulating plate 6 and the anode tail plate 7 by a press, and after a period of pressure maintaining, the side plate 9 is started to be installed. The side plates 9 are connected to the anode and cathode tabs 7 and 1, respectively, by bolts, and then the press is released. Finally, the reactor core fixing strip 3 and the side plate connecting rod 4 are installed.

Because high power fuel cells are typically relatively long in size, some are even over 1 meter in size. The side plate 9 adopts a structure of bending 90 degrees, so that the strength of the side plate 9 is greatly increased. Simulation shows that the displacement generated by the middle part of the reactor core is the largest in the vibration process of the electric pile. As shown in fig. 2, an insulating plate 10 is added between the side plate 9 and the pile core 5 to reduce displacement of the pile core during vibration and to increase insulation. The whole side plate is connected by adopting 14 side plate connecting rods 4 to form a cage structure. Further increasing the strength and rigidity of the side plates 9.

Experiments prove that the fuel cell packaging structure has the advantages that the leakage detection of the air tightness of the electric pile before vibration test, the electric pile performance test and the electric pile performance test are compared with the air tightness test of the electric pile after vibration. The pile air tightness and the appearance part displacement which are verified by vibration and impact are not changed, and the pile performance is not obviously attenuated. This solution is therefore satisfactory.

Claims

1. The utility model provides a fuel cell packaging structure, includes cathode tailboard (1), pile reactor core (5) and positive pole tailboard (7), its characterized in that: the device also comprises a side plate connecting rod (4), a current collecting plate (8) and a side plate (9);

the cathode tail plate (1) and the anode tail plate (7) are respectively positioned at the cathode and the anode of the pile core (5), the current collecting plate (8) is positioned at two side surfaces of the pile core (5) and is fixed through a side plate (9), and the side plate (9) is fixedly connected with the cathode tail plate (1) and the anode tail plate (7);

the side surface of the pile core (5) which is not provided with the collecting plate (8) is fixed by a side plate connecting rod (4).

2. The fuel cell package structure according to claim 1, wherein: the outer side of the pile core (5) is also provided with a core fixing strip (3).

3. The fuel cell package structure according to claim 1, wherein: the side plate (9) is provided with a bending part which bends towards the outer side of the electric pile core (5) at the corner of the electric pile core (5).

4. The fuel cell package structure according to claim 1, wherein: a cathode insulating plate (2) is arranged between the cathode of the electric pile reactor core (5) and the cathode tail plate (1); an anode insulating plate (6) is arranged between the anode of the pile core (5) and the anode tail plate (7).

5. The fuel cell package structure according to claim 1, wherein: the side plates (9) are fixed on the anode tailboard (7) and the cathode tailboard (1) through bolts.

6. The fuel cell package structure according to claim 1, wherein: the battery packaging structure is characterized in that an insulating plate is arranged between the side plate (9) and the pile core (5).