CN212257560U - Fuel cell stack performance improving device and system - Google Patents
Fuel cell stack performance improving device and system Download PDFInfo
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- CN212257560U CN212257560U CN202021362795.8U CN202021362795U CN212257560U CN 212257560 U CN212257560 U CN 212257560U CN 202021362795 U CN202021362795 U CN 202021362795U CN 212257560 U CN212257560 U CN 212257560U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The embodiment of the utility model provides a fuel cell stack performance hoisting device and system relates to the fuel cell field. This fuel cell stack performance hoisting device includes first box, the first pipe, first return pipe and pump, first box is used for holding the acid solution, the one end and the first box intercommunication of first pipe, the other end of first pipe is used for the entry intercommunication with the sharing cavity of fuel cell stack, the export intercommunication of first return pipe and sharing cavity, the other end and the first box intercommunication of first return pipe, the pump sets up on the first pipe, the pump is used for making the acid solution in the first box flow into sharing cavity through the first pipe, and flow back into the first box through first return pipe, in order to realize circulation operation, the acid solution is used for in the endless in-process, replace out the metal impurity ion in every monocell that communicates with sharing cavity. The fuel cell stack performance improving device and the system can effectively improve the power generation performance of the fuel cell stack.
Description
Technical Field
The utility model relates to a fuel cell field particularly, relates to a fuel cell stack performance hoisting device and system.
Background
The fuel cell stack, called electric stack for short, is the power generation core of the fuel cell and is formed by repeatedly stacking bipolar plates and membrane electrodes. For a proton exchange membrane fuel cell, a membrane electrode consists of a proton exchange membrane, an anode catalyst layer, a cathode catalyst layer, an anode gas diffusion layer, a cathode gas diffusion layer and a protective frame. Most proton exchange membranes are composed of sulfonic acid group (-SO)3H) The polymer material of (3). Due to hydrogen ions (H) in the sulfonate radical+) Therefore, the proton exchange membrane can conduct protons. The catalyst layer mainly comprises a catalyst and proton exchange resin, wherein the proton exchange resin is generally the same high molecular material as the proton exchange membrane, and sulfonate (-SO)3H) Is responsible for conducting protons in the catalytic layer having a three-dimensional structure, so that the electrochemical reaction proceeds.
In the case of proton exchange membranes and proton exchange resins, the ability to conduct protons may decrease during use, resulting in a decrease in the power generation performance of the stack.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a fuel cell stack performance improving apparatus and system, which can effectively improve the aforementioned technical problems.
The embodiment of the utility model is realized like this:
in a first aspect, an embodiment of the present invention provides a fuel cell stack performance improving apparatus, including a first tank, a first pipe, a first return pipe, and a pump, the first box body is used for containing acid solution, one end of the first pipe is communicated with the first box body, the other end of the first pipe is used for being communicated with an inlet of a common chamber of the fuel cell stack, the first return pipe is communicated with an outlet of the common chamber, the other end of the first return pipe is communicated with the first box body, the pump is arranged on the first pipe, the pump is used for enabling the acid solution in the first box body to flow into the common chamber through the first pipe and flow back into the first box body through the first return pipe, so as to realize the circulation operation, and the acid solution is used for displacing metal impurity ions in each single cell communicated with the shared cavity in the circulation process.
In an alternative embodiment, the fuel cell stack performance enhancing apparatus further includes a heating member for heating the first tank.
In an alternative embodiment, the fuel cell stack performance enhancing apparatus further comprises a flow meter disposed on the first pipe, the flow meter being configured to detect a flow rate in the first pipe.
In an alternative embodiment, the fuel cell stack performance enhancing apparatus further comprises a temperature gauge disposed on the first tube, the temperature gauge for sensing a temperature of a fluid within the first tube.
In an alternative embodiment, the fuel cell stack performance improving apparatus further includes a first valve provided on the first pipe, the first valve being configured to control on/off of the first pipe.
In an optional embodiment, the fuel cell stack performance improving apparatus further includes a second tube, a second tank, and a third tube, one end of the second tube is communicated with the first tank, one end of the third tube is communicated with the second tank, the other end of the second tube and the other end of the third tube are simultaneously communicated with the first tube, and the second tank is configured to hold deionized water.
In an alternative embodiment, the fuel cell stack performance improving apparatus further includes a second valve provided on the second pipe, the second valve being configured to control on/off of the second pipe, and a third valve provided on the third pipe, the third valve being configured to control on/off of the third pipe.
In an alternative embodiment, the common chamber includes a hydrogen chamber and an air chamber, and the fuel cell stack performance improving apparatus further includes a fourth pipe and a fifth pipe, one end of the fourth pipe is configured to communicate with the hydrogen chamber, one end of the fifth pipe is configured to communicate with the air chamber, and the other end of the fourth pipe and the other end of the fifth pipe are simultaneously in communication with the first pipe.
In an alternative embodiment, the fuel cell stack performance improving apparatus further includes a fourth valve and a fifth valve, the fourth valve is disposed on the fourth pipe, the fourth valve is configured to control on/off of the fourth pipe, the fifth valve is disposed on the fifth pipe, and the fifth valve is configured to control on/off of the fifth pipe.
In a second aspect, an embodiment of the present invention provides a fuel cell stack performance improvement system, including a fuel cell stack and the fuel cell stack performance improvement apparatus of any one of the foregoing embodiments, wherein the common chamber of the fuel cell stack is communicated with the first pipe.
In a third aspect, an embodiment of the present invention provides a method for improving performance of a fuel cell stack, including:
an acid solution is introduced into the common chamber of the fuel cell stack and circulated.
In an alternative embodiment, before the step of passing the acid solution into the common chamber of the fuel cell stack, the method for improving the performance of the fuel cell stack further comprises:
the acid solution is heated.
In an alternative embodiment, after the step of passing the acid solution into the common chamber of the fuel cell stack, the method for improving the performance of the fuel cell stack further comprises:
and discharging the acid solution from the common chamber, and introducing deionized water into the common chamber.
The utility model discloses beneficial effect includes, for example:
the embodiment of the utility model provides a fuel cell stack performance hoisting device, inventor's research discovers, proton exchange membrane and proton exchange resinThe reason why the proton-conducting ability is reduced is that the metal ions M are gradually taken into the proton-exchange membrane and the proton-exchange resin during usen+(e.g. K)+，Na+，Ca2+，Mg2+，Fe2+，Co2+，Ni2+，Cu2+，Al3+Etc.) they can replace H+To form-SO3M1/nThe concentration of protons in the proton exchange membrane and/or the proton exchange resin is reduced, resulting in a reduction in their ability to conduct protons. The fuel cell stack performance improving device provided by the embodiment comprises a first box body, a first pipe and a pump, wherein under the action of the pump, an acid solution in the first box body can flow into a common cavity through the first pipe, and after flowing into the common cavity, the acid solution enters each single cell communicated with the common cavity and flows in a flow field on the hydrogen side or the air side of the single cell. In the flowing process, acid solution can enter the carbon paper porous diffusion layer, the porous catalyst layer below the diffusion layer and the proton exchange membrane below the catalyst layer in sequence, and the proton exchange membrane and the group-SO polluted by metal ions in the proton exchange resin in the catalyst layer are subjected to chemical reaction3M1/nConversion back to-SO3H, and the acid solution can also be used for using H as metal impurities free in the gas diffusion layer and the catalytic layer+And (4) replacing. Therefore, through the circulation process of the acid solution, metal ions in each single cell can be removed, the proton conduction capability of the proton exchange membrane and the proton exchange resin is enhanced, and the power generation performance of the fuel cell stack is improved.
The embodiment of the utility model provides a still provides a fuel cell stack performance lift system, including the aforementioned fuel cell stack performance hoisting device who mentions to possess this fuel cell stack performance hoisting device's whole functions, this fuel cell stack performance lift system can promote the power generation performance of fuel cell stack equally.
The embodiment of the utility model provides a fuel cell stack performance promotion method is still provided, and this fuel cell stack performance promotion method includes in letting in the sharing cavity of fuel cell stack with acid solution, and circulate. The acid solution flows into the common chamberThen, the gas enters each single cell communicated with the common chamber, and flows in a flow field on the hydrogen side or the air side of the single cell. In the flowing process, acid solution can enter the carbon paper porous diffusion layer, the porous catalyst layer below the diffusion layer and the proton exchange membrane below the catalyst layer in sequence, and the group-SO polluted by metal ions in the proton exchange membrane and the proton exchange resin is treated by chemical reaction3M1/nConversion back to-SO3H, and the acid solution can also be used for using H as metal impurities free in the gas diffusion layer and the catalytic layer+And (4) replacing. Therefore, through the circulation process of the acid solution, metal ions in each single cell can be removed, the proton conduction capability of the proton exchange membrane and the proton exchange resin is enhanced, and the power generation performance of the fuel cell stack is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a first fuel cell stack performance improvement system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second fuel cell stack performance improvement system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a third fuel cell stack performance improvement system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fourth fuel cell stack performance improvement system according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a method for improving performance of a fuel cell stack according to an embodiment of the present invention.
Icon: 1-fuel cell stack performance enhancing system; 11-a fuel cell stack; 111-common chamber; 1111-hydrogen chamber; 1112-an air chamber; 12-fuel cell stack performance enhancing means; 121-a first box; 122-a first tube; 123-pump; 124-heating element; 125-a flow meter; 126-temperature table; 127-a first valve; 128-a second tube; 129-a second box; 130-a third tube; 131-a second valve; 132-a third valve; 133-a fourth tube; 134-fifth tube; 135-a fourth valve; 136-a fifth valve; 137-a first return pipe; 138-a second return line; 139-third return line; 140-a sixth valve; 141-seventh valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 foregoing terms in the present invention can be understood in specific instances by those of ordinary skill in the art.
The inventor researches and discovers that the reason why the proton-conducting capacity of the proton exchange membrane and the proton exchange resin is reduced is that the metal ions M gradually enter the proton exchange membrane and the proton exchange resin when the proton exchange membrane and the proton exchange resin are usedn+(e.g. K)+，Na+，Ca2+，Mg2+，Fe2+，Co2+，Ni2+，Cu2+，Al3+Etc.) they can replace H+To form-SO3M1/nThe concentration of protons in the proton exchange membrane and/or the proton exchange resin is reduced, resulting in a reduction in their ability to conduct protons.
Generally, the contamination of metal ions can come from the following sources. One is from the stack itself, such as gas diffusion layers, graphite plates, or metal plates. The other is from the metal pipe connector connected with the galvanic pile, which enters the anode or cathode of the galvanic pile respectively with hydrogen or air. Thirdly, the reaction gas, especially air, is difficult to completely remove the pollutants in the atmosphere. In addition, the unused galvanic pile may be contaminated gradually by impurities in the air during the course of its existence in the warehouse.
Referring to fig. 1, the present embodiment provides a fuel cell stack performance improving system 1, where the fuel cell stack performance improving system 1 includes a fuel cell stack 11 and a fuel cell stack performance improving device 12, and the fuel cell stack performance improving device 12 can improve the power generation performance of the fuel cell stack 11.
Referring to fig. 1, in the present embodiment, the fuel cell stack 11 includes a common chamber 111, the fuel cell stack performance improving apparatus 12 includes a first tank 121, a first pipe 122, a first return pipe 137, and a pump 123, the first tank 121 is used for containing an acid solution, one end of the first pipe 122 is communicated with the first tank 121, the other end of the first pipe 122 is communicated with an inlet of the common chamber 111 of the fuel cell stack 11, the first return pipe 137 is communicated with an outlet of the common chamber 111, the other end of the first return pipe 137 is communicated with the first tank 121, and the pump 123 is disposed on the first pipe 122.
When the pump 123 is activated, the pump 123 enables the acid solution in the first tank 121 to flow into the common chamber 111 through the first pipe 122 and to re-enter the first tank 121 through the first return pipe 137 to be circulated. Thus, the acid solution flowing into the common chamber 111 can contact each of the unit cells communicating with the common chamber 111, and chemically react with the group-SO contaminated with the metal ions in the proton exchange membrane and the proton exchange resin in each of the unit cells3M1/nConversion back to-SO3H, the proton exchange membrane and the proton exchange resin enhance the proton-conducting ability, thereby enhancing the power generation performance of the fuel cell stack 11.
In this embodiment, dilute sulfuric acid is used as the acid solution.
Referring to fig. 1, in the present embodiment, the fuel cell stack performance enhancing apparatus 12 further includes a heating member 124, and the heating member 124 is used for heating the first casing 121.
It can be understood that, when the heating element 124 heats the first box 121, the temperature of the acid solution can be raised, the activity is enhanced, the subsequent chemical reaction is facilitated, the speed of the heated acid solution entering and exiting the gas diffusion layer, the catalytic layer and the proton exchange membrane of each single cell is also increased, and the time for displacing the metal impurities in the single cells can be effectively shortened. Typically, the heating element 124 heats the acid solution to 60-80 ℃, for example: 65 ℃, 75 ℃, 78 ℃ and the like.
Referring to fig. 1, in the present embodiment, the fuel cell stack performance enhancing apparatus 12 further includes a flow meter 125, and the flow meter 125 is disposed on the first pipe 122. The flow meter 125 is capable of detecting the flow rate within the first pipe 122. It is understood that the flow in the first pipe 122 can be observed by the operator in real time according to the flow meter 125. Generally, the flow rate of the acid solution in the first pipe 122 should be adjusted according to the size or power of the stack, and is usually controlled in a range of 0.5-5L/min, such as 0.6L/min, 2L/min, etc., preferably per kW.
Referring to fig. 1, in the present embodiment, the fuel cell stack performance improving apparatus 12 further includes a temperature meter 126, and the temperature meter 126 is disposed on the first pipe 122. The temperature gauge 126 may detect the temperature of the fluid within the first tube 122. It is understood that the temperature of the acid solution in the first pipe 122 can be obtained by the staff member according to the temperature table 126 in real time, and when the temperature of the acid solution is too high or too low, the heating temperature of the heating member 124 is adjusted to control the temperature of the acid solution in the first pipe 122 in time.
Referring to fig. 1, in the present embodiment, the fuel cell stack performance enhancing apparatus 12 further includes a first valve 127, the first valve 127 is disposed on the first pipe 122, and the first valve 127 can control the on/off of the first pipe 122.
In the fuel cell stack 11, the common chamber 111 includes an inlet and an outlet. In the present embodiment, the first pipe 122 communicates with the inlet of the common chamber 111, and the acid solution can enter into the common chamber 111 from the inlet and flow out from the outlet.
It should be noted that as the circulation time of the acid solution between the common chamber 111 and the first tank 121 increases, more and more metal impurities are displaced from the stack and mixed into the acid solution, but the overall concentration is low, and the normal operation of the acid solution is not affected.
Referring to fig. 2, compared to the fuel cell stack performance improvement system 1 shown in fig. 1, the fuel cell stack performance improvement system 1 shown in fig. 2 further includes a second pipe 128, a second tank 129, and a third pipe 130, wherein one end of the second pipe 128 is communicated with the first tank 121, one end of the third pipe 130 is communicated with the second tank 129, and the other end of the second pipe 128 and the other end of the third pipe 130 are simultaneously communicated with the first pipe 122.
It should be noted that the second tank 129 is used for holding deionized water. After the metal ions are replaced by the acid solution, the deionized water in the second tank 129 may be introduced into the common chamber 111 to remove the acid solution remaining in the common chamber 111, thereby avoiding the influence of the acid solution on the normal power generation operation of the fuel cell stack 11.
It should be noted that the deionized water may also be heated before use to enhance the diffusion capacity and speed of the deionized water in the gas diffusion layer, the catalytic layer and the proton exchange membrane in the stack, thereby shortening the time for washing out the residual acid solution. Similarly, the temperature of the deionized water can be increased by heating the second tank 129. The first tank 121 and the second tank 129 may be heated using the same heating member 124, or may be heated using different heating members 124.
The system 1 for improving the performance of the fuel cell stack shown in fig. 2 further includes a second valve 131 and a third valve 132, the second valve 131 is disposed on the second pipe 128, the second valve 131 is used for controlling the on/off of the second pipe 128, the third valve 132 is disposed on the third pipe 130, and the third valve 132 is used for controlling the on/off of the third pipe 130.
The fuel cell stack performance improving system 1 shown in fig. 2 further includes a second return pipe 138, a third return pipe 139, a sixth valve 140, and a seventh valve 141, one end of the second return pipe 138 communicates with the first tank 121, one end of the third return pipe 139 communicates with the second tank 129, the other end of the second return pipe 138 and the other end of the third return pipe 139 both communicate with the first return pipe 137, the sixth valve 140 is provided on the second return pipe 138, and the seventh valve 141 is provided on the third return pipe 139.
In this way, when the metal ions are replaced with the acid solution, the first valve 127, the second valve 131, and the sixth valve 140 may be opened, and at this time, the third valve 132 and the seventh valve 141 may be closed. When deionized water is required to be introduced into the common chamber 111 after the replacement is completed, the first valve 127, the third valve 132, and the seventh valve 141 may be opened, and the second valve 131 and the sixth valve 140 may be closed.
Referring to fig. 3, the fuel cell stack 11 of fig. 3 is provided with a hydrogen chamber 1111 and an air chamber 1112. Compared with the fuel cell stack performance improvement system 1 shown in fig. 1, the fuel cell stack performance improvement system 1 shown in fig. 3 further includes a fourth pipe 133 and a fifth pipe 134, one end of the fourth pipe 133 is communicated with the hydrogen chamber 1111, one end of the fifth pipe 134 is communicated with the air chamber 1112, and the other end of the fourth pipe 133 and the other end of the fifth pipe 134 are simultaneously communicated with the first pipe 122.
Thus, the acid solution flowing out of the first tank 121 can enter the hydrogen chamber 1111 and the air chamber 1112 at the same time, and displace metal ions in the gas diffusion layer, the catalytic layer, and the proton exchange membrane on the anode side (hydrogen side) and the cathode side (air side) of each unit cell in the stack, thereby accelerating the return of the power generation performance of the fuel cell stack 11. Of course, in some examples, the acid solution may be selectively introduced into only the hydrogen chamber 1111 or the air chamber 1112.
The fuel cell stack performance enhancing system 1 shown in fig. 3 further includes a fourth valve 135 and a fifth valve 136, the fourth valve 135 is disposed on the fourth pipe 133, the fourth valve 135 controls the on/off of the fourth pipe 133, the fifth valve 136 is disposed on the fifth pipe 134, and the fifth valve 136 controls the on/off of the fifth pipe 134.
Thus, when the fourth valve 135 is opened and the fifth valve 136 is closed, the acid solution enters the hydrogen chamber 1111 and displaces the metal ions in the gas diffusion layer, the catalytic layer, and the proton exchange membrane on the anode side (hydrogen side) of each unit cell in the stack. When the fifth valve 136 is opened and the fourth valve 135 is closed, the acid solution enters the air chamber 1112 and displaces the metal ions in the gas diffusion layer, the catalytic layer, and the proton exchange membrane of the cathode side (air side) of each unit cell in the stack. When the fourth valve 135 and the fifth valve 136 are simultaneously opened, the acid solution can simultaneously enter the hydrogen chamber 1111 and the air chamber 1112, and simultaneously displace metal ions in the gas diffusion layer, the catalytic layer, and the proton exchange membrane on the anode side (hydrogen side) and the cathode side (air side) of each unit cell.
Referring to fig. 4, the differences between the fuel cell stack performance enhancing system 1 shown in fig. 4 and the fuel cell stack performance enhancing system 1 shown in fig. 2 are similar to the differences between the fuel cell stack performance enhancing system 1 shown in fig. 3 and the fuel cell stack performance enhancing system 1 shown in fig. 1, and will not be described again.
Referring to fig. 5, the present embodiment further provides a method for improving performance of a fuel cell stack, including:
s31: an acid solution is passed into the common chamber 111 of the fuel cell stack 11.
It is understood that the acid solution flowing into the common chamber 111 can contact the proton exchange membrane and the proton exchange resin to chemically react with the metal ion-contaminated groups-SO in the proton exchange membrane and the proton exchange resin3M1/nConversion back to-SO3H, the proton exchange membrane and the proton exchange resin enhance the proton-conducting ability, thereby enhancing the power generation performance of the fuel cell stack 11.
Typically, the duration of action of the acid solution is 25 to 35 minutes, for example, 30 minutes.
In this embodiment, the method for improving the performance of the fuel cell stack can be implemented by the system 1 for improving the performance of the fuel cell stack.
Referring to fig. 5, before step S31, the method for improving performance of a fuel cell stack further includes:
s30: the acid solution is heated.
The acid solution is heated, so that the activity of the acid solution is enhanced, and subsequent chemical reactions are conveniently carried out. It is understood that the heating element 124 described above may be used to heat the acid solution.
Referring to fig. 5, after step S31, the method for improving the performance of the fuel cell stack further includes:
s33: the acid solution is discharged from the common chamber 111, and deionized water is introduced into the common chamber 111.
After the deionized water is introduced into the common chamber 111, the residual acid solution in the common chamber 111 can be removed, and the influence of the acid solution on the normal power generation operation of the fuel cell stack 11 is avoided.
Typically, the deionized water continues to remove the residual acid solution from the common chamber 111 for 5-15 minutes, such as 10 minutes.
The above description is only exemplary of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fuel cell stack performance improving apparatus, comprising a first tank (121), a first pipe (122), a first return pipe (137), and a pump (123), wherein the first tank (121) is used for containing an acid solution, one end of the first pipe (122) is communicated with the first tank (121), the other end of the first pipe (122) is used for being communicated with an inlet of a common chamber (111) of a fuel cell stack (11), the first return pipe (137) is communicated with an outlet of the common chamber (111), the other end of the first return pipe (137) is communicated with the first tank (121), the pump (123) is arranged on the first pipe (122), the pump (123) is used for enabling the acid solution in the first tank (121) to flow into the common chamber (111) through the first pipe (122) and to flow back into the first tank (121) through the first return pipe (137), so as to realize the circulation operation, and the acid solution is used for displacing metal impurity ions in each unit cell communicated with the common chamber (111) in the circulation process.
2. The fuel cell stack performance enhancing apparatus according to claim 1, wherein the fuel cell stack performance enhancing apparatus (12) further comprises a heating member (124), the heating member (124) being for heating the first tank (121).
3. The fuel cell stack performance enhancing apparatus according to claim 1, wherein the fuel cell stack performance enhancing apparatus (12) further comprises a flow meter (125), the flow meter (125) being provided on the first pipe (122), the flow meter (125) being configured to detect a flow rate in the first pipe (122).
4. The fuel cell stack performance enhancing apparatus according to any one of claims 1 to 3, wherein the fuel cell stack performance enhancing apparatus (12) further comprises a temperature gauge (126), the temperature gauge (126) being disposed on the first tube (122), the temperature gauge (126) being configured to detect a temperature of a fluid within the first tube (122).
5. The fuel cell stack performance enhancing apparatus according to any one of claims 1 to 3, wherein the fuel cell stack performance enhancing apparatus (12) further comprises a first valve (127), the first valve (127) is disposed on the first pipe (122), and the first valve (127) is used for controlling the on-off of the first pipe (122).
6. The fuel cell stack performance enhancing apparatus according to any one of claims 1 to 3, wherein the fuel cell stack performance enhancing apparatus (12) further comprises a second pipe (128), a second tank (129), and a third pipe (130), one end of the second pipe (128) is communicated with the first tank (121), one end of the third pipe (130) is communicated with the second tank (129), the other end of the second pipe (128) and the other end of the third pipe (130) are simultaneously communicated with the first pipe (122), and the second tank (129) is used for containing deionized water.
7. The fuel cell stack performance enhancing apparatus according to claim 6, wherein the fuel cell stack performance enhancing apparatus (12) further includes a second valve (131) and a third valve (132), the second valve (131) being provided on the second pipe (128), the second valve (131) being for controlling on/off of the second pipe (128), the third valve (132) being provided on the third pipe (130), the third valve (132) being for controlling on/off of the third pipe (130).
8. The fuel cell stack performance enhancing apparatus according to any one of claims 1 to 3, wherein the common chamber (111) includes a hydrogen chamber (1111) and an air chamber (1112), the fuel cell stack performance enhancing apparatus (12) further includes a fourth pipe (133) and a fifth pipe (134), one end of the fourth pipe (133) is for communicating with the hydrogen chamber (1111), one end of the fifth pipe (134) is for communicating with the air chamber (1112), and the other end of the fourth pipe (133) and the other end of the fifth pipe (134) are simultaneously in communication with the first pipe (122).
9. The fuel cell stack performance enhancing apparatus according to claim 8, wherein the fuel cell stack performance enhancing apparatus (12) further comprises a fourth valve (135) and a fifth valve (136), the fourth valve (135) is provided on the fourth pipe (133), the fourth valve (135) is used for controlling on-off of the fourth pipe (133), the fifth valve (136) is provided on the fifth pipe (134), and the fifth valve (136) is used for controlling on-off of the fifth pipe (134).
10. A fuel cell stack performance enhancing system, comprising a fuel cell stack (11) and a fuel cell stack performance enhancing apparatus (12) according to any one of claims 1 to 9, wherein the common chamber (111) of the fuel cell stack (11) is in communication with the first pipe (122).
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| CN202021362795.8U CN212257560U (en) | 2020-07-10 | 2020-07-10 | Fuel cell stack performance improving device and system |
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| CN202021362795.8U CN212257560U (en) | 2020-07-10 | 2020-07-10 | Fuel cell stack performance improving device and system |
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