CN210379275U

CN210379275U - Fuel cell stack group

Info

Publication number: CN210379275U
Application number: CN201921083104.8U
Authority: CN
Inventors: 李辉; 周勇; 黄华强; 汪仕才; 符煌; 王海江
Original assignee: Shenzhen Southerntech Fuel Cell Co ltd
Current assignee: Shenzhen Southerntech Fuel Cell Co ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-04-21
Anticipated expiration: 2029-07-11

Abstract

The utility model relates to a fuel cell's technical field discloses a fuel cell pile group, include: one or more cell stacks; the shell component is provided with a containing chamber for containing the single cell stack, and the shell component is provided with an air inlet and an air outlet; the air system comprises a hydrogen concentration sensor arranged in the accommodating chamber, an exhaust motor connected to the air inlet and an exhaust control circuit, wherein the exhaust control circuit is electrically connected with the hydrogen concentration sensor. The utility model provides a fuel cell pile group, when hydrogen concentration that detects through hydrogen concentration sensor and hold indoor is higher than the threshold value, the control circuit control air exhaust motor of airing exhaust ventilates holding the room, dispels the heat and reduces hydrogen concentration, avoids the explosion risk, has higher security in the use.

Description

Fuel cell stack group

Technical Field

The utility model relates to a fuel cell's technical field especially relates to a fuel cell electric pile group.

Background

A fuel cell is an electrochemical cell whose main principle is to convert chemical energy in a fuel and an oxidant directly into electrical energy through an oxidation-reduction reaction. Proton Exchange Membrane Fuel Cells (PEMFCs), which are important branches of the fuel cell field, have the general characteristics of fuel cells such as high energy conversion efficiency and environmental friendliness, and also have the outstanding advantages of high starting speed at room temperature, small volume, no electrolyte loss, easy drainage, long service life, high specific power and specific energy, and the like. The proton exchange membrane fuel cell is not only suitable for the construction of a distributed power station, but also suitable for mobile power supply, is a novel military and civil mobile power supply, and has very wide application prospect.

The single cells of the fuel cell are composed of bipolar plates and membrane electrodes (MEA-catalyst, proton exchange membrane, carbon paper/carbon cloth), sealing elements are embedded among a plurality of single cells, and the single cells are tightly pressed by front and rear end plates and then are fastened and fastened by screws, so that the fuel cell stack is formed. To meet high power requirements, a plurality of stacks are typically connected in series to form a fuel cell stack assembly.

The fuel cell stack group in the prior art can not well radiate and ventilate, and after hydrogen leakage occurs, the accumulated heat can easily cause explosion. In addition, the prior art fuel cell stack assembly is also unable to monitor cell voltage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fuel cell electric pile group aims at solving the problem that fuel cell electric pile group has the explosion risk among the prior art.

The utility model discloses a realize like this, provide a fuel cell stack group, include: one or more cell stacks; the shell component is provided with a containing chamber for containing the single cell stack, and the shell component is provided with an air inlet and an air outlet; the air system comprises a hydrogen concentration sensor arranged in the accommodating chamber, an exhaust motor connected to the air inlet and an exhaust control circuit, wherein the exhaust control circuit is electrically connected with the hydrogen concentration sensor.

Further, the housing assembly includes: the main shell and the panel form the accommodating chamber after being enclosed; the front end plate is sealed at the front end of the accommodating chamber and is provided with the air inlet; and the rear end plate is sealed at the rear end of the accommodating chamber and is provided with the air outlet.

Furthermore, the front end plate and the rear end plate are both rectangular, and the air inlet and the air outlet are arranged at diagonal positions on the front end plate and the rear end plate.

Further, be equipped with import module and export module on the monomer galvanic pile, the import module includes: an air inlet pipe, a hydrogen inlet pipe and a cooling water inlet pipe; the outlet module includes: an air outlet pipe, a hydrogen outlet pipe and a cooling water outlet pipe.

Furthermore, a plurality of front openings for the inlet module and the outlet module to extend out are formed in the front end plate.

Further, still include positive negative pole binding post, be equipped with on the back end plate and supply the back trompil that positive negative pole binding post stretches out.

Furthermore, a front supporting block is arranged on the front end plate, and a rear supporting block is arranged on the rear end plate.

Further, the device also comprises a detection module for detecting the voltage of each single cell stack.

Further, a buffer structure is arranged between the shell component and the single cell stack.

Compared with the prior art, the utility model provides a fuel cell electric pile group when hydrogen concentration sensor detects and holds indoor hydrogen concentration and be higher than the threshold value, the control circuit control of airing exhaust air motor ventilates holding the room, dispels the heat and reduces hydrogen concentration, avoids explosion risk, and in use has higher security.

Drawings

Fig. 1 is a schematic structural diagram of a fuel cell stack assembly according to an embodiment of the present invention;

fig. 2 and fig. 3 are schematic diagrams illustrating an explosion structure in two directions of a fuel cell stack assembly according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The implementation of the present embodiment is described in detail below with reference to specific drawings.

As shown in fig. 1 to 3, the present embodiment provides a fuel cell stack 1 set including a plurality of cell stacks 1, a housing assembly 2, and an air system. Wherein, a plurality of monomer galvanic piles 1 are connected in series. The housing assembly 2 has a containing chamber in which the plurality of cell stacks 1 are contained, an air inlet 21 and an air outlet 22 are opened on the housing assembly 2, and air can enter from the air inlet 21, flow through each cell stack 1 and then flow out from the air outlet 22. The air system comprises a hydrogen concentration sensor, an exhaust motor and an exhaust control circuit, wherein the hydrogen concentration sensor is arranged in the accommodating chamber, and the exhaust control circuit is electrically connected with the hydrogen concentration sensor. The exhaust motor is connected to the air intake 21 and controlled by an exhaust control circuit.

In the fuel cell stack 1 set, the air inlet 21 and the air outlet 22 are provided, so that the accommodating chamber can exchange air with the outside, and the fuel cell stack has better heat dissipation. When the hydrogen concentration sensor detects that the hydrogen concentration in the accommodating chamber is higher than the threshold value, the exhaust control circuit controls the exhaust motor to ventilate the accommodating chamber, the outside air flows through the accommodating chamber, the heat is taken away, and the hydrogen concentration is reduced, so that the explosion risk is avoided, and the safety is high in use.

In this embodiment, the fuel cell stack 1 set further includes a detection module for detecting a voltage of each cell stack 1, a buffer structure is disposed between the housing assembly 2 and the cell stacks 1, and the number of the cell stacks 1 is specifically two. The voltage of each single cell stack 1 can be conveniently detected through the detection module, and the voltage of each single cell stack 1 can be monitored on line according to needs. The buffer structure can avoid external vibration and impact to be transmitted to the single electric pile 1, so that the single electric pile 1 is protected from being damaged by vibration, when the fuel cell electric pile 1 group is applied to a vehicle, the impact force of a road surface in the running process of the vehicle can not be directly transmitted to the single electric pile 1, and the fuel cell electric pile 1 group can be safely and long-term used. The buffer structure may be an elastic soft filler, such as buffer cotton, or may be implemented by a spring, a spring plate, or the like, which is not described in detail herein. In other embodiments, the number of the cell stacks 1 may be one or more.

As shown in fig. 2 and 3, the housing assembly 2 in the present embodiment includes: a main casing 23 and a panel 24 enclosing the same to form a containing chamber; a front end plate 25 sealed at the front end of the accommodating chamber and provided with an air inlet 21; and a rear end plate 26 sealed at the rear end of the accommodating chamber and provided with an air outlet 22.

The front end plate 25 and the rear end plate 26 are rectangular, and the air inlet 21 and the air outlet 22 are arranged at diagonal positions on the front end plate 25 and the rear end plate 26. That is, the whole housing assembly 2 is a rectangular parallelepiped, and the air inlet 21 and the air outlet 22 are located at two diagonal positions farthest from the rectangular parallelepiped. When air enters the air inlet 21 and finally flows out of the air outlet 22, the air inlet 21 and the air outlet 22 which are arranged diagonally can ensure that the air flows through all areas in the accommodating chamber as far as possible, and the heat dissipation and ventilation effects are improved.

Be equipped with import module 11 and export module 12 on the monomer pile 1, import module 11 includes: an air inlet pipe, a hydrogen inlet pipe and a cooling water inlet pipe; the outlet module 12 includes: an air outlet pipe, a hydrogen outlet pipe and a cooling water outlet pipe; the fuel cell stack 1 set further includes positive and negative electrode terminals 3. The function of each structure can be seen by its name, and as a structure common in the prior art, the detailed working principle of each structure is not repeated.

Correspondingly, the front end plate 25 is provided with a plurality of front openings 251 through which the inlet module 11 and the outlet module 12 can extend. The rear end plate 26 is provided with a rear opening 261 through which the positive and negative terminals 3 can be extended.

A front support block 41 is provided on the front end plate 25 and a rear support block 42 is provided on the rear end plate 26 for ease of mounting to an external structure.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A fuel cell stack assembly, comprising:

one or more cell stacks;

the shell component is provided with a containing chamber for containing the single cell stack, and the shell component is provided with an air inlet and an air outlet;

the air system comprises a hydrogen concentration sensor arranged in the accommodating chamber, an exhaust motor connected to the air inlet and an exhaust control circuit, wherein the exhaust control circuit is electrically connected with the hydrogen concentration sensor.

2. A fuel cell stack assembly in accordance with claim 1, wherein said housing assembly comprises:

the main shell and the panel form the accommodating chamber after being enclosed;

the front end plate is sealed at the front end of the accommodating chamber and is provided with the air inlet;

and the rear end plate is sealed at the rear end of the accommodating chamber and is provided with the air outlet.

3. A fuel cell stack assembly in accordance with claim 2, wherein said front end plate and said rear end plate are rectangular, and said inlet vent and said outlet vent are diagonally located on said front end plate and said rear end plate.

4. A fuel cell stack assembly in accordance with claim 2, wherein said individual cell stacks are provided with an inlet module and an outlet module, said inlet module comprising: an air inlet pipe, a hydrogen inlet pipe and a cooling water inlet pipe; the outlet module includes: an air outlet pipe, a hydrogen outlet pipe and a cooling water outlet pipe.

5. The fuel cell stack assembly of claim 4 wherein said front end plate defines a plurality of front openings through which said inlet modules and said outlet modules extend.

6. The fuel cell stack assembly of claim 5 further comprising positive and negative terminals, wherein the rear end plate has rear openings through which the positive and negative terminals extend.

7. A fuel cell stack assembly in accordance with claim 2, wherein said front end plate has a front support block and said rear end plate has a rear support block.

8. A fuel cell stack assembly according to any one of claims 1 to 7, further comprising a detection module for detecting a voltage of each of said individual cell stacks.

9. A fuel cell stack assembly according to any one of claims 1 to 7, wherein the number of said individual cell stacks is two.

10. A fuel cell stack assembly according to any one of claims 1 to 7, wherein a buffer structure is provided between the housing assembly and the cell stacks.