CN212033155U

CN212033155U - Low-temperature storage and low-temperature starting device for hydrogen fuel cell

Info

Publication number: CN212033155U
Application number: CN202020181307.7U
Authority: CN
Inventors: 全欢; 全琎; 杨涛; 叶麦克; 全睿; 刘明; 全书海
Original assignee: Wuhan Hyvitech Co ltd
Current assignee: Wuhan Hyvitech Co ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2020-11-27
Anticipated expiration: 2030-02-18

Abstract

The utility model discloses a hydrogen fuel cell low-temperature storage and low-temperature starting device, which comprises an air filter, an air compressor, a three-way valve, an intercooler, a back pressure valve and a humidifier; the inlet of the air compressor is connected with an air filter, the outlet of the air compressor is connected with the 1 st end of a first three-way valve, the 3 rd end of the first three-way valve is connected with the inlet end of an intercooler, the 2 nd end of the first three-way valve is connected with the inlet end of a first backpressure valve, and the outlet end of the first backpressure valve is connected with a humidified outlet B of a humidifier; the outlet end of the intercooler is connected with a dry air inlet end A of the humidifier, and the humidified outlet end B of the humidifier is connected with the inlet end of the electric pile and the like. The utility model discloses thereby realized effectively that the low pressure hot-air sweeps fast high-efficient processing galvanic pile inside persists moisture, shortened promptly and sweeps the time, protected galvanic pile entry pressure again and be unlikely to too high and lead to the galvanic pile to damage. The safe low-temperature storage and low-temperature starting of the fuel cell system are ensured.

Description

Low-temperature storage and low-temperature starting device for hydrogen fuel cell

Technical Field

The utility model relates to a hydrogen fuel cell technical field, more specifically relates to a hydrogen fuel cell low temperature storage and low temperature starting drive.

Background

A hydrogen fuel cell is an electrochemical power generation device that continuously converts chemical energy in a fuel and an oxidant directly into electrical energy in an electrochemical reaction without combustion. It is known from the operating principle of fuel cells that the cathode of a cell is the site where the catalytic layer is both where the electrochemical reaction of the cell proceeds and where the product water of the reaction is generated. When the fuel cell works at normal temperature, other humidifying water and reaction product water react in the cell, and the cathode catalysis layer product water diffuses to the cathode diffusion layer in a gas or liquid state to enter a cathode gas flow channel and is carried out by gas flow in the cell. In the environment below 0 ℃, water is generated at the cathode of the cell and is transported outwards, at the moment, the water in the cell is frozen and cannot be removed from the cell, and the water is accumulated in the cell to cause the catalytic layer to form ice to cover the active surface of the catalytic layer, so that the reaction gas is reduced or prevented from reaching a reaction interface, and the fuel cell cannot be started; on the other hand, the humidifying water can block the flow channel to prevent the transmission of the reaction gas; most importantly, the formation of ice crystals from water inside the stack can damage the stack, thereby rendering the fuel cell inoperable.

Blow and sweep the pile, thereby weather the moisture in the pile and can effectively avoid the low temperature to cause the inside pile that freezes to damage the pile, but directly sweep the pile with the air compressor machine has many drawbacks, firstly because the air temperature sweeps for a long time less long and sweep the effect very poor, secondly gets into the pile high pressure and can damage the pile.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a hydrogen fuel cell low temperature storage and low temperature starting drive, has realized low pressure hot-air effectively and has swept to having handled the inside moisture that persists of galvanic pile fast high-efficiently, having shortened promptly and having swept the time, the protection galvanic pile entry pressure is unlikely to too high again and leads to the galvanic pile to damage. The safe low-temperature storage of the fuel cell system is ensured.

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

a hydrogen fuel cell low-temperature storage and low-temperature starting device comprises an air filter, an air compressor, a three-way valve, an intercooler, a back pressure valve and a humidifier; the inlet of an air compressor is connected with an air filter, the outlet of the air compressor is connected with the 1 st end of a first three-way valve, the 2 nd end of the first three-way valve is connected with the inlet end of a first backpressure valve, the 3 rd end of the first three-way valve is connected with the inlet end of an intercooler, the outlet end of the first backpressure valve is respectively connected with the outlet end of a humidifier and the inlet end of a galvanic pile, the outlet end of the intercooler is connected with the dry air inlet end A of the humidifier, and the humidified outlet end B of the humidifier; the outlet end of the pile is connected with the 1 st end of the second three-way valve, the 3 rd end of the second three-way valve is connected with the humidifying inlet end C of the humidifier, the 2 nd end of the second three-way valve is connected with the outlet end of the second backpressure valve, and the humidifying outlet end D of the humidifier is connected with the inlet end of the second backpressure valve.

The utility model has the advantages that:

(1) the utility model discloses low pressure hot-air has been realized effectively and has been swept to having handled the inside moisture that persists of galvanic pile fast high-efficiently, having shortened promptly and having swept the time, the protection galvanic pile entry pressure is unlikely to too high again and leads to the galvanic pile to damage. The safe low-temperature storage and low-temperature starting of the fuel cell system are ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

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

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description. Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Before describing the embodiments, some necessary terms need to be explained. For example:

if the terms "first," "second," etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a "first" element discussed below could also be termed a "second" element without departing from the teachings of the present invention. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

The various terms appearing in this application are used for the purpose of describing particular embodiments only and are not intended as limitations on the invention, except where the context clearly dictates otherwise, the singular is intended to include the plural as well.

When the terms "comprises" and/or "comprising" are used in this specification, these terms are intended to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence and/or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

As shown in fig. 1, a low-temperature storage and low-temperature starting device for a hydrogen fuel cell comprises an air filter, an air compressor, a three-way valve, an intercooler, a back pressure valve and a humidifier; the inlet of an air compressor is connected with an air filter, the outlet of the air compressor is connected with the 1 st end of a first three-way valve, the 2 nd end of the first three-way valve is connected with the inlet end of a first backpressure valve, the 3 rd end of the first three-way valve is connected with the inlet end of an intercooler, the outlet end of the first backpressure valve is respectively connected with the outlet end of a humidifier and the inlet end of a galvanic pile, the outlet end of the intercooler is connected with the dry air inlet end A of the humidifier, and the humidified outlet end B of the humidifier; the outlet end of the pile is connected with the 1 st end of the second three-way valve, the 3 rd end of the second three-way valve is connected with the humidifying inlet end C of the humidifier, the 2 nd end of the second three-way valve is connected with the outlet end of the second backpressure valve, and the humidifying outlet end D of the humidifier is connected with the inlet end of the second backpressure valve.

Example 1

As shown in fig. 1, a person skilled in the art can implement the present invention as a hydrogen fuel cell system with low-temperature shutdown air purging, which includes an air filter, an air compressor, a three-way valve, an intercooler, a back pressure valve, and a humidifier; the inlet of an air compressor is connected with an air filter, the outlet of the air compressor is connected with the 1 st end of a first three-way valve, the 2 nd end of the first three-way valve is connected with the inlet end of a first backpressure valve, the 3 rd end of the first three-way valve is connected with the inlet end of an intercooler, the outlet end of the first backpressure valve is respectively connected with the outlet end of a humidifier and the inlet end of a galvanic pile, the outlet end of the intercooler is connected with the dry air inlet end A of the humidifier, and the humidified outlet end B of the humidifier; the outlet end of the pile is connected with the 1 st end of the second three-way valve, the 3 rd end of the second three-way valve is connected with the humidifying inlet end C of the humidifier, the 2 nd end of the second three-way valve is connected with the outlet end of the second backpressure valve, and the humidifying outlet end D of the humidifier is connected with the inlet end of the second backpressure valve.

The working process of the embodiment:

air is compressed by an air compressor through an air filter and enters an intercooler for cooling through the

positions

1 and 3 of a first three-way valve, the air enters an electric pile through humidification of a humidifier to provide oxygen for electrochemical reaction, and produced water and unreacted gases such as oxygen and nitrogen are humidified through the

positions

1 and 3 of a second three-way valve through the humidifier and then are discharged to the atmosphere through a second back pressure valve.

When the external environment is low in temperature, the fuel cell stops working and needs to be purged. First three-way valve 1, 2 are opened, and the air is compressed by the air compressor machine through air cleaner, gets into first backpressure valve through first three-way valve 1, 2, and first backpressure valve is adjusted to suitable aperture, carries out suitable backpressure intensification to air compressor machine exhaust air, and the formation hot-air gets into the pile and carries out hot-blast sweeping, blows off the pile through opening second three-way valve 1, 2 positions with the moisture in the pile. Thereby ensuring that no water in the electric pile is not frozen in a low-temperature environment. Wherein the air compressor machine compression air compressor machine passes through behind the first backpressure valve backpressure, and the air can rapid heating up, and the air behind the backpressure through first backpressure valve gets into the pile pressure very little to can not be because of the too big damage pile of pressure, thereby realize that hot-air low pressure sweeps the pile.

In other technical features in this embodiment, those skilled in the art can flexibly select the technical features according to actual situations to meet different specific actual requirements. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the invention. In other instances, well-known components, structures or parts are not described in detail in order to avoid obscuring the present invention, and the technical scope of the present invention is defined by the claims.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are used in a generic sense as is understood by those skilled in the art. For example, the components may be fixedly connected, movably connected, integrally connected, or partially connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected inside two elements, and the like, and for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations, that is, the expression of the language and the implementation of the actual technology can flexibly correspond, and the expression of the language (including the drawings) of the specification of the present invention does not constitute any single restrictive interpretation of the claims.

Modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, which should be limited only by the claims appended hereto. In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the invention. In other instances, well-known techniques, such as specific construction details, operating conditions, and other technical conditions, have not been described in detail in order to avoid obscuring the present invention.

Claims

1. A hydrogen fuel cell low-temperature storage and low-temperature starting device is characterized by comprising an air filter, an air compressor, a three-way valve, an intercooler, a back pressure valve and a humidifier; the inlet of an air compressor is connected with an air filter, the outlet of the air compressor is connected with the 1 st end of a first three-way valve, the 2 nd end of the first three-way valve is connected with the inlet end of a first backpressure valve, the 3 rd end of the first three-way valve is connected with the inlet end of an intercooler, the outlet end of the first backpressure valve is respectively connected with the humidified outlet end B of a humidifier and the inlet end of a galvanic pile, the outlet end of the intercooler is connected with the dry air inlet end A of the humidifier, and the humidified outlet end B of the humidifier is; the outlet end of the pile is connected with the 1 st end of the second three-way valve, the 3 rd end of the second three-way valve is connected with the humidifying inlet end C of the humidifier, the 2 nd end of the second three-way valve is connected with the outlet end of the second backpressure valve, and the humidifying outlet end D of the humidifier is connected with the inlet end of the second backpressure valve.