CN215070070U

CN215070070U - Battery anode injection reflux device

Info

Publication number: CN215070070U
Application number: CN202121413101.3U
Authority: CN
Inventors: 范爱民; 范德新; 叶长流; 肖文平
Original assignee: Shunde Polytechnic
Current assignee: Shunde Polytechnic
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-12-07
Anticipated expiration: 2031-06-24

Abstract

The utility model discloses a battery anode injection reflux unit, which comprises a high-pressure hydrogen source and an electric pile, wherein the hydrogen of the high-pressure hydrogen source enters the electric pile to perform chemical reaction, and is characterized by further comprising a reflux unit and a voltage stabilizer, wherein the reflux unit comprises a backpressure device, a water-gas separation device and an injector, a first inlet of the injector is connected with the high-pressure hydrogen source, a second inlet of the injector is connected with the water-gas separation device, and an injection outlet of the injector is connected with the high-pressure hydrogen source through the voltage stabilizer; the residual hydrogen in the galvanic pile is injected back into the galvanic pile through the backpressure device and the water-gas separation device. The utility model discloses set up the expansion tank in the front side of galvanic pile, be in through increaseing leading atmospheric pressure or guaranteeing to adsorb atmospheric pressure when the system for under abominable operating mode, all do not influence the normal work of air current ejector.

Description

Battery anode injection reflux device

Technical Field

The utility model relates to a new energy automobile technical field, more specifically say, relate to battery anode draws and penetrates reflux unit.

Background

With the gradual deepening of the life theory of green environmental protection nowadays, more and more people begin to select new energy automobiles, especially hydrogen engine automobiles, because the fuel that the hydrogen engine used is gaseous hydrogen, what discharges is pure water, it has advantages such as pollution-free, zero release, reserves are abundant, and hydrogen engine automobile is the vehicle that really realizes zero release. The invention discloses a fuel cell anode hydrogen circulation system and a control method thereof as disclosed in Chinese invention patent CN202011502442.8, the fuel cell anode hydrogen circulation system with a pressure device comprises a hydrogen tank, an ejector, a fuel cell and a buffer tank, wherein the hydrogen tank, the ejector, the fuel cell and the buffer tank are sequentially connected through a hydrogen pipe, a first electromagnetic valve is arranged on the hydrogen pipe between the hydrogen tank and the ejector, a hydrogen branch pipe is also arranged between the buffer tank and the ejector, and two ends of the hydrogen branch pipe are respectively connected with the buffer tank and the ejector. However, the circulation system of the invention is not provided with a pressure guarantee device, so that the negative pressure adsorption capacity of hydrogen is affected under different use environments, for example, under severe working conditions, insufficient pressure may occur, and hydrogen in the auxiliary circulation line cannot flow back normally.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery anode draws and penetrates reflux unit mainly is to under the different condition of operating mode, through increaseing leading atmospheric pressure or guaranteeing to adsorb atmospheric pressure for under abominable operating mode, all do not influence the normal work of air current ejector, thereby overcome the not enough of prior art.

The technical proposal of the utility model for solving the technical problem is that: a battery anode injection reflux device comprises a high-pressure hydrogen source and an electric pile, wherein hydrogen of the high-pressure hydrogen source enters the electric pile to perform chemical reaction; the residual hydrogen in the galvanic pile is injected back into the galvanic pile through the backpressure device and the water-gas separation device.

The high-pressure hydrogen injector is characterized by further comprising a pressure adjusting device and a mass flow meter, wherein the pressure adjusting device and the mass flow meter are connected between the high-pressure hydrogen source and the injector.

The pressurizer is an expansion tank.

And a one-way valve is arranged between the galvanic pile and the ejector.

The utility model has the advantages that:

the utility model discloses set up the expansion tank in the front side of galvanic pile, be in through increaseing leading atmospheric pressure or guaranteeing to adsorb atmospheric pressure when the system for under abominable operating mode, all do not influence the normal work of air current ejector.

The utility model discloses be provided with endless recovery route, make the inside hydrogen that does not decompose completely of PEMFC pile pass through backpressure device, moisture separator, get back to the ejector, rethread humidification device that heats reachs and decomposes again in the PEMFC pile, reaches the complete utilization of hydrogen, avoids extravagant resource, practices thrift use cost.

Drawings

Fig. 1 is the structure schematic diagram of the injection reflux device of the utility model.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. "plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected. Can also be detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

Referring to fig. 1, the utility model discloses a battery anode draws and penetrates reflux unit, draw the route including galvanic pile reaction route, hydrogen, galvanic pile reaction route: the system comprises a high-pressure hydrogen source 1, a pressure adjusting device 2, a mass flow meter 3, an ejector 4, a heating and humidifying device 5, an expansion tank 11 and a PEMFC (proton exchange membrane fuel cell) stack 10.

The pressure adjusting device 2 is used for adjusting the pressure, the mass flow meter 3 can measure and control the flow of the hydrogen entering the reactor reaction line, and the heating and humidifying device 5 can increase the humidity and temperature of the hydrogen.

The hydrogen is output by a high-pressure hydrogen source 1, sequentially passes through a pressure regulating device 2, a mass flow meter 3, an ejector 4 and a heating and humidifying device 5, and finally reaches the interior of a PEMFC (proton exchange membrane fuel cell) galvanic pile 10 to perform chemical reaction with oxygen in the galvanic pile, so that the starting work of the galvanic pile is completed.

The unreacted hydrogen returns to the reactor reaction route from the hydrogen injection route. The hydrogen injection route is as follows: the device comprises a PEMFC pile 10, a backpressure device 6, a water-gas separation device 7, an ejector 4, a heating and humidifying device 5 and the PEMFC pile 10. The backpressure device 6 is used for realizing backpressure regulation of the battery, and the water-gas separation device 7 is used for screening residual substances, separating water from unreacted hydrogen and preventing water from entering a reactor reaction route. The residual substances after the galvanic pile reaction reach a water-gas separator 7 after passing through a backpressure device 6, water and gas are separated in the water-gas separator 7, redundant oxygen is discharged through an exhaust valve 8, redundant water is discharged through a drain valve 9, hydrogen which is not completely decomposed returns to an ejector 4, and then reaches a PEMFC 10 again through a heating and humidifying device 5 to participate in the reaction.

The expansion tank 11 can increase the preposed air pressure or ensure the adsorption air pressure according to the use condition, so that the normal work of the airflow ejector is not influenced under the severe working condition.

In fuel cells, hydrogen gas is used as a carrier of energy, and its stable and efficient supply is closely related to the output power of the stack. When the galvanic pile is in a low-load area, hydrogen is wasted due to excessive hydrogen supply, and the effective utilization rate is low; in the high load region, due to the large hydrogen demand, the hydrogen supply will be insufficient, and finally the fuel starvation and the power output will be insufficient, which seriously affects the working performance of the whole system. Therefore, it is necessary to develop an efficient hydrogen supply circulation system, which is matched with the fuel cell stack in a system integration manner, and can realize gas recovery and pressurization without consuming additional power, thereby improving fuel utilization and fuel cell efficiency.

An air bag is arranged in the tank body of the expansion tank, and the air bag is connected with the tank body through a flange plate. Nitrogen with certain pressure is pre-filled between the air bag and the tank body, so that when the expansion tank is arranged on the system to work, and when the working pressure of the system is abnormal and the pressure rise is greater than the pressure of the nitrogen pre-filled in the expansion tank, the system hydrogen can enter the expansion tank to absorb pressure fluctuation, and the phenomenon that too much hydrogen enters the galvanic pile due to too high system air pressure is avoided; when the pressure of the system is reduced to be less than the pressure of nitrogen in the expansion tank, the part of hydrogen in the expansion tank can be extruded out under the action of the pressure of the nitrogen and is fed back to the system, and the pressure of the system is not reduced too much. The pressure fluctuation of the system is automatically adjusted and balanced through the expansion tank, so that the system can stably run all the time.

As a further improvement, in order to prevent the hydrogen from flowing back, a check valve (not shown) is arranged between the stack 10 and the backpressure device 6, so that the residual hydrogen can only flow from the stack to the ejector 4 and can not flow back to the stack.

The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept, and these all fall into the protection scope of the present invention.

Claims

1. A battery anode injection reflux device comprises a high-pressure hydrogen source and an electric pile, wherein hydrogen of the high-pressure hydrogen source enters the electric pile to perform chemical reaction; the residual hydrogen in the galvanic pile is injected back into the galvanic pile through the backpressure device and the water-gas separation device.

2. The battery anode injection reflux device according to claim 1, further comprising a pressure regulating device and a mass flow meter, wherein the pressure regulating device and the mass flow meter are connected between the high-pressure hydrogen source and the injector.

3. The battery anode ejector flow back device of claim 1, wherein the voltage regulator is an expansion tank.

4. The battery anode ejector reflux unit according to claim 1, 2 or 3, wherein a one-way valve is arranged between the galvanic pile and the ejector.