CN109935858A - A leak-free, non-directional fuel cell fuel tank - Google Patents

Abstract

A kind of No leakage, non-directional fuel cell-use fuel tank, including tank body, liner and connector.Tank body plays support, protection liner, realizes and is tightly connected with liner at tank outlet.Liner plays a part of to contain fuel, is made of elastic material or flexible thin-film material.Liner has the ability of variable volume, for the air pressure balance inside guaranteeing when inner fuel increases or reduces with outside.Connector is a kind of interface for acting to connect liner fuel cavity and exterior line with shut-off valve function.

Description

A leak-free, non-directional fuel cell fuel tank

technical field

The present invention relates to the field of fuel cells, in particular to a fuel tank for non-leakage and non-directional fuel cells. It is suitable for microgravity operating environment or occasions with high requirements on the leakage of fuel tank liquid.

Background technique

A fuel cell is a chemical reaction device that directly converts chemical energy in fuel into electrical energy. The fuel cell is not limited by the Carnot cycle, and has the characteristics of far greater efficiency than the internal combustion engine, and the reaction products are mainly water and carbon dioxide. It is an environmentally friendly green energy and is considered to be an ideal power generation device in the future. Aerospace and other aspects have broad application prospects.

A liquid fuel cell is a power generation device using liquid fuel, typically a direct methanol fuel cell (DMFC). Compared with gas-supplied fuel cell systems (hydrogen-oxygen fuel cells, etc.), when the fuel tank of the liquid fuel cell system is working, a vacuum will be generated inside as the fuel decreases. When the vacuum reaches a certain value, the fuel supply will be difficulty. Therefore, it is necessary to use a section of balance pipe to connect the inner cavity of the fuel tank and the external atmosphere to achieve air pressure balance. However, the introduction of a balance pipe, on the one hand, has great technical difficulties for small and special-shaped fuel tanks that require non-directional use; on the other hand, it will cause leakage of liquid fuel, which will lead to safety problems. Currently, there is no technology to achieve a leak-free, non-directional fuel tank in a fuel cell.

SUMMARY OF THE INVENTION

A non-leakage, non-directional fuel cell fuel tank, comprising a closed hollow rigid tank body 1, a liquid outlet 2 is opened at the upper end of the tank body 1, and a flexible material or elastic material with an open upper end and a closed lower end is arranged in the tank body 1 The cylindrical inner liner 3 is made of material, the upper open end of the inner liner 3 is tightly connected with the inner wall surface of the upper part of the tank body 1 , and the liquid outlet 2 is located in the area surrounded by the upper open end of the inner liner 3 .

A joint 4 with a shut-off valve function is provided at the liquid outlet 2 outside the tank body 1 .

The bottom of the tank body 1 is provided with an air pressure balance port 5 as required.

The material of the rigid tank body is metal material or hard plastic material;

The flexible material or elastic material is plastic, rubber or tarpaulin;

The elastic material is PE, PP and other films.

The liquid outlet 2 of the tank is connected to the feed pump through a valve through a pipeline.

The fuel tank of the present invention is mainly composed of a tank body, an inner tank and a joint.

The outer tank has a certain strength to protect and support the inner tank, and can be made of metal, non-metal or composite materials according to the conditions of use.

The inner tank and the tank body are sealed at the outlet of the tank body.

The inner tank stores fuel, with no or only a small amount of gas present.

The inner tank is made of fuel corrosion-resistant material and has a certain strength. The inner tank can choose elastic material and flexible film material according to the needs of use.

The joint is an interface with the function of a shut-off valve to connect the fuel cavity of the inner tank and the external pipeline.

In this scheme, according to the conditions of use, you can choose whether there is a pressure balance port at the bottom of the tank to communicate with the atmosphere.

The fuel tank can also be used for the storage of buffer solutions prior to start-up of certain fuel cells, such as DMFC systems.

The present invention has the following beneficial effects and advantages

1. The fully enclosed design is adopted, except that there will be a very small amount of fuel at the joint during use and filling (the quantity depends on the selection of the joint), and the goal of zero leakage is achieved;

2. Whether it is a closed compressed gas or a fuel tank connected to the atmosphere, the deformability of the inner tank makes it possible to prevent the internal vacuum from being generated during the continuous extraction of the internal fuel, causing the fuel to be unable to continue to be extracted;

3. The purpose of feeding material in any direction can be realized.

Description of drawings

Fig. 1 is one of the structural composition diagrams of the present invention;

Fig. 2 is the second structural composition diagram of the present invention.

Detailed ways

To further illustrate the present invention, the following examples are given.

A non-leakage, non-directional fuel cell fuel tank is provided with a closed hollow rigid tank body 1, the upper end of the tank body 1 is provided with a liquid outlet 2, and the tank body 1 is provided with a flexible material or In the cylindrical inner liner 3 made of elastic material, the upper open end of the inner liner 3 is tightly connected with the inner wall surface of the upper part of the tank body 1 , and the liquid outlet 2 is located in the area surrounded by the upper open end of the inner liner 3 . A joint 4 with a shut-off valve function is provided at the liquid outlet 2 outside the tank body 1 .

Connect the universal interface of the CPC brand NS4D42002 model to the paired universal interface of the NS4D17002 model, and connect the end of the NS4D17002 universal interface to the feed pump. The external fuel is injected into the fuel tank by the operation of the pump. Connect the general interface of NS4D17002 model to the general interface of NS4D42002 model on the fuel cell, and the fuel supply can be realized when the fuel pump inside the fuel cell works.

The above descriptions are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to the above contents. Changes and substitutions based on the technology disclosed in the present invention should be included within the protection scope of the present invention.

Claims (5)

1. a kind of No leakage, non-directional fuel cell-use fuel tank, it is characterised in that: including closed hollow rigid tank body (1), tank body (1) upper end offers liquid outlet (2), in the tank body (1) equipped with the closed flexible material in a upper end opening lower end or The tubular liner (3) of elastic material, the inner wall airtight connection of liner (3) upper open end and tank body (1) top, and liquid outlet (2) it is located in the region that liner (3) upper open end is surrounded.

2. fuel tank according to claim 1, it is characterised in that:

The connector (4) with shut-off valve function is equipped at the external liquid outlet (2) of tank body (1).

3. fuel tank according to claim 1, it is characterised in that:

Tank body (1) bottom is equipped with air pressure balance mouth (5) as needed.

4. fuel tank according to claim 1, it is characterised in that:

The material of the rigidity tank body is metal, nonmetallic or composite material；

The flexible material or elastic material are plastics, rubber or waterproof cloth.

5. fuel tank according to claim 1, it is characterised in that:

The liquid outlet (2) of tank body is connect by pipeline with feed pump through valve.