CN109742422B - Closed proton exchange membrane fuel cell - Google Patents
Closed proton exchange membrane fuel cell Download PDFInfo
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- CN109742422B CN109742422B CN201910148316.8A CN201910148316A CN109742422B CN 109742422 B CN109742422 B CN 109742422B CN 201910148316 A CN201910148316 A CN 201910148316A CN 109742422 B CN109742422 B CN 109742422B
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- 239000012495 reaction gas Substances 0.000 claims abstract description 57
- 239000012295 chemical reaction liquid Substances 0.000 claims abstract description 38
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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
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Abstract
本发明公开一种闭口质子交换膜燃料电池，包括电池组件和尾气处理装置，电池组件内部形成有气液通道，气液通道包括沿其流通方向依次形成的前电池段、加速段和后电池段，加速段用以供自前电池段输出的反应气和/或反应液加速通过并进入后电池段；尾气处理装置用于对处于加速段内的反应气和/或反应液作用，以获得去液反应气或者聚液反应气。本发明中，通过在前电池段和后电池段间设置加速段，有助于提高反应气和/或反应液自前电池段至后电池段的流通速度，再配合尾气处理装置，使得电池组件内的排水工作可快速进行而不影响电池组件内的电化学反应，并且分段排水的设置更有利于电池组件的彻底、高效排水，有助于提高排水可靠性。
The invention discloses a closed-port proton exchange membrane fuel cell, which includes a battery assembly and a tail gas treatment device. A gas-liquid channel is formed inside the battery assembly, and the gas-liquid channel includes a front battery section, an acceleration section and a rear battery section formed in sequence along the flow direction thereof. , the acceleration section is used to accelerate the reaction gas and/or reaction liquid output from the front battery section to pass through and enter the rear battery section; the tail gas treatment device is used to act on the reaction gas and/or reaction liquid in the acceleration section to obtain deliquoring Reactive gas or poly-liquid reactive gas. In the present invention, by arranging an acceleration section between the front battery section and the rear battery section, it is helpful to improve the flow velocity of the reaction gas and/or the reaction solution from the front battery section to the rear battery section, and the exhaust gas treatment device is combined to make the inside of the battery assembly. The drainage work of the battery can be carried out quickly without affecting the electrochemical reaction in the battery assembly, and the setting of segmented drainage is more conducive to the thorough and efficient drainage of the battery assembly, which is helpful to improve the reliability of drainage.
Description
Technical Field
The invention relates to the technical field of proton exchange membrane fuel cells, in particular to the technical field of water drainage of closed proton exchange membrane fuel cells, and particularly relates to a closed proton exchange membrane fuel cell.
Background
Under the action of a catalyst, protons in the proton exchange membrane fuel cell pass through the proton exchange membrane to reach a cathode, and reaction gases (such as hydrogen and oxygen) react with each other to realize the purpose of converting chemical energy into electric energy.
The proton exchange membrane fuel cell can generate water in the reaction process, if the water amount is too much, the water can cover the reaction area of the catalyst layer to form a water film to limit the contact of oxygen and the catalyst layer, and the reaction gas is prevented from reaching the surface of the catalyst layer to participate in electrochemical reaction; if the water amount is too small, the reaction gas may not react sufficiently, which also affects the electric energy conversion effect, and the water amount in the proton exchange membrane fuel cell needs to be controlled reasonably. Based on the above, the conventional open proton exchange membrane fuel cell can sweep and take away the water generated by the reaction in the cell by using excessive gas, thereby avoiding the failure of the cell caused by the accumulation of water; however, the outlet of the conventional closed proton exchange membrane fuel cell is in a closed state, so that water in the cell cannot be directly blown out of the cell by using excessive reaction gas, pulse type or gravity type drainage is generally adopted, but the pulse type or gravity type drainage method cannot be adapted to complete closed operation, drainage is not thorough and timely, and reliability is poor.
Disclosure of Invention
The invention mainly aims to provide a closed proton exchange membrane fuel cell, aiming at solving the problem of poor drainage effect of the traditional closed proton exchange membrane fuel cell.
In order to achieve the above object, the present invention provides a closed proton exchange membrane fuel cell, comprising:
the battery pack is internally provided with a gas-liquid channel, the gas-liquid channel comprises a front battery section, an acceleration section and a rear battery section which are sequentially formed along the flowing direction of the gas-liquid channel, and the acceleration section is used for accelerating reaction gas and/or reaction liquid output from the front battery section to pass through and enter the rear battery section; and the number of the first and second groups,
and the tail gas treatment device is used for acting on the reaction gas and/or the reaction liquid in the acceleration section to obtain liquid-removed reaction gas or liquid-collected reaction gas.
Optionally, the battery assembly comprises:
the single cells are sequentially stacked in the flow direction, each single cell is provided with a reaction cavity, and the reaction cavities of the single cells are sequentially communicated to form the gas-liquid channel; and the number of the first and second groups,
the separator is clamped between two adjacent monocells in the monocells to separate the gas-liquid channel into the front cell section and the rear cell section, and the shape of the separator is matched with the shape of a clamping surface of the two monocells;
the separator is provided with a first gas collecting groove communicated with the exhaust port of the front battery section and a second gas collecting groove communicated with the gas inlet of the rear battery section, and the first gas collecting groove and the second gas collecting groove are communicated with each other to form the accelerating section.
Optionally, the separator is made of a conductive material.
Optionally, a sealing rib is arranged at the joint between the first gas collecting groove and the exhaust port of the front battery section; and/or the presence of a gas in the gas,
and a sealing rib is arranged at the joint between the second gas collecting groove and the gas inlet of the rear battery section.
Optionally, the first gas collecting channel and the second gas collecting channel are communicated through a passage hole, wherein:
a section of the channel hole close to the first gas collecting groove is arranged in a gradually expanding manner in the direction close to the first gas collecting groove; and/or the presence of a gas in the gas,
and one section of the channel hole close to the second gas collecting groove is arranged in a gradually expanding manner in the direction close to the second gas collecting groove.
Optionally, the closed proton exchange membrane fuel cell further includes a check valve, and the check valve is disposed between the second gas collecting channel and the gas inlet of the rear cell segment, and is configured to limit the reaction gas and/or the reaction liquid from entering the second gas collecting channel from the gas inlet of the rear cell segment.
Optionally, the tail gas treatment device comprises a gas-liquid separator and a water collector, and is used for obtaining the liquid-removing reaction gas, wherein an input pipe of the gas-liquid separator is communicated with the first gas collecting groove, a gas output pipe of the gas-liquid separator is communicated with the second gas collecting groove, and a liquid output pipe of the gas-liquid separator is communicated with the water collector.
Optionally, a liquid suction structure is arranged at the accelerating section, which is close to the second gas collecting groove, and the liquid suction structure is used for sucking residual reaction liquid in the liquid removing reaction gas.
Optionally, the fuel cell comprises a trailing end cell located forward in the flow direction;
the tail gas treatment device comprises a pulse blower, wherein the pulse blower is used for obtaining the liquid gathering reaction gas, an input pipe of the pulse blower is communicated with an exhaust port of the tail end single cell, and an output pipe of the pulse blower is communicated with the acceleration section.
Optionally, the battery assembly has a heat dissipation channel;
the separator is provided with a cooling structure that acts on the heat dissipation channel to accelerate heat dissipation of the battery assembly.
In the technical scheme provided by the invention, the accelerating section is arranged between the front battery section and the rear battery section, so that the flow speed of reaction gas and/or reaction liquid from the front battery section to the rear battery section is improved, and the tail gas treatment device is matched, so that the drainage work in the battery assembly can be quickly carried out without influencing the electrochemical reaction of the battery assembly, and the sectional drainage is more favorable for thorough and efficient drainage of the battery assembly, and is favorable for improving the drainage reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic perspective exploded view of a closed proton exchange membrane fuel cell according to an embodiment of the present invention;
FIG. 2 is a schematic view of the separator of FIG. 1;
FIG. 3 is a schematic view showing the flow path of the reactant gas and/or the reactant liquid in FIG. 1.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The proton exchange membrane fuel cell can generate water in the reaction process, if the water amount is too much, the water can cover the reaction area of the catalyst layer to form a water film to limit the contact of oxygen and the catalyst layer, and the reaction gas is prevented from reaching the surface of the catalyst layer to participate in electrochemical reaction; if the water amount is too small, the reaction gas may not react sufficiently, which also affects the electric energy conversion effect, and the water amount in the proton exchange membrane fuel cell needs to be controlled reasonably. Based on the above, the conventional open proton exchange membrane fuel cell can sweep and take away the water generated by the reaction in the cell by using excessive gas, thereby avoiding the failure of the cell caused by the accumulation of water; however, the outlet of the conventional closed proton exchange membrane fuel cell is in a closed state, so that water in the cell cannot be directly blown out of the cell by using excessive reaction gas, pulse type or gravity type drainage is generally adopted, but the pulse type or gravity type drainage method cannot be adapted to complete closed operation, drainage is not thorough and timely, and reliability is poor.
In view of the above, the present invention provides a closed proton exchange membrane fuel cell, and fig. 1 to 3 show an embodiment of the closed proton exchange membrane fuel cell according to the present invention.
Referring to fig. 1 and 3, in the present embodiment, the closed proton exchange membrane fuel cell 100 generally includes a housing, and a mounting cavity is formed inside the housing, and the mounting cavity has a pipe for inputting pure reaction gas and no pipe for outputting reaction gas and/or reaction liquid. The closed proton exchange membrane fuel cell 100 comprises a cell assembly 1 and a tail gas treatment device 2, wherein the cell assembly 1 is installed in the installation cavity, a gas-liquid channel 11 is formed inside the cell assembly 1, the gas-liquid channel 11 comprises a front cell section 111, an acceleration section 112 and a rear cell section 113 which are sequentially formed along the flow direction of the gas-liquid channel, the acceleration section 112 is used for accelerating the reaction gas and/or the reaction liquid output from the front cell section 111 to pass through and enter the rear cell section 113, the time wasted by the circulation of the reaction gas and/or the reaction liquid is reduced, and the generation efficiency of the electrochemical reaction in the cell assembly 1 can be improved. It should be noted that a plurality of the acceleration sections 112 may be provided in the gas-liquid channel 11, and each acceleration section 112 is provided with one front battery section 111 and one rear battery section 113. The gas-liquid passage 11 may take various forms, for example, may be a cavity or a pipe having various shapes. The tail gas treatment device 2 is configured to act on the reaction gas and/or the reaction liquid in the acceleration section 112 to achieve the purpose of draining, and the specific implementation manner of the action may be various, for example, one of them is to drain the reaction liquid in the tail gas of the front battery section 111 to obtain a liquid-removed reaction gas, that is, a pure reaction gas, and then introduce the pure reaction gas into the rear battery section 113 to continue to participate in the subsequent electrochemical reaction; secondly, the reaction liquid and the reaction gas in the tail gas of the battery component 1 are accumulated to obtain liquid accumulation reaction gas, namely gas-liquid mixture, and then the gas-liquid mixture is introduced into the battery component 1 to realize the self-humidifying purpose of the part of the battery component 1.
In the technical scheme provided by the invention, the acceleration section 112 is arranged between the front battery section 111 and the rear battery section 113, so that the flow speed of reaction gas and/or reaction liquid from the front battery section 111 to the rear battery section 113 is improved, and the tail gas treatment device 2 is matched, so that the drainage work in the battery assembly 1 can be rapidly carried out without influencing the electrochemical reaction of the battery assembly 1, and the sectional drainage is more favorable for thorough and efficient drainage of the battery assembly 1, and is favorable for improving the drainage reliability.
Specifically, in the present embodiment, the cell assembly 1 includes a plurality of single cells 12 and separators 13 sequentially stacked in a flow direction, wherein each single cell 12 has a reaction chamber 123, the reaction chambers 123 of the single cells 12 are sequentially communicated to form the gas-liquid channel 11, specifically, each single cell 12 generally includes two bipolar plates 121 and a membrane electrode 122 sandwiched between the two bipolar plates 121, each bipolar plate 121 is formed by an anode flow field plate and a cathode flow field plate through hot pressing with glue, the anode flow field plate and the cathode flow field plate respectively have a reaction chamber, in each single cell 12, the anode reaction chamber, the cathode reaction chamber and the membrane electrode 122 are commonly communicated to form the reaction chamber 123, the reaction chamber 123 generally includes a reaction region, an air inlet 124 and an air outlet 125, the reaction region is used for forming an independent region for intensively performing electrochemical reaction, in the flowing direction, the air inlet 124 of the first single cell 12, namely the first end single cell 12 is communicated with the air inlet pipeline of the installation cavity, the air outlet 125 of the first end single cell 12 is communicated with the air inlet 124 of the second single cell 12, and the like are carried out in sequence, so that the communicated gas-liquid channel 11 is formed. The partition plate 13 is interposed between two adjacent single cells 12 of the plurality of single cells 12 to divide the battery assembly 1 into a front portion and a rear portion, so as to achieve the purpose of dividing the gas-liquid channel 11 into the front cell segment 111 and the rear cell segment 113, and the outer shape of the partition plate 13 is adapted to the shape of the clamping surface between the two single cells 12, so that the stacked installation between the single cells 12 and the partition plate 13 is more closely fitted, which contributes to reducing the assembly error between the single cells 12 and the partition plate 13, and avoids adverse effects on the power output of the battery assembly 1. The partition plate 13 is provided with a first gas collecting channel 131 communicated with the gas outlet 125 of the front battery section 111, and a second gas collecting channel 132 communicated with the gas inlet 124 of the rear battery section 113, and the first gas collecting channel 131 and the second gas collecting channel 132 are communicated with each other to form the acceleration section 112. The arrangement of the first gas collecting groove 131 and the second gas collecting groove 132 is helpful for collecting the reaction gas and/or the reaction liquid more efficiently, and avoids blockage or backflow caused by untimely output of the reaction gas and/or the reaction liquid. After the tail gas treatment device 2 acts on the reaction gas and/or the reaction liquid in the acceleration section 112, the generated liquid-removed reaction gas or liquid-collected reaction gas can be accelerated to enter the rear battery section 113 through the second gas collecting groove 132. It should be noted that, in the present invention, a plurality of the partition plates 13 and/or the tail gas treatment device 2 may be provided, and are used for dividing the battery assembly 1 into a plurality of segments, so as to perform drainage work sequentially segment by segment, and increase the circulation speed of gas and liquid inside the battery assembly 1, so that the drainage effect is more efficient.
Next, in order to reduce the loss of the electric power output of the cell assembly 1, in the present embodiment, the separator 13 is preferably made of a conductive material, such as a graphite material or a metal material, so that the separator 13 has a smaller specific resistance and a better electric conductivity, and reduces the loss during the electric power transmission, thereby improving the reliability of the performance of the closed proton exchange membrane fuel cell 100.
In addition, in the present embodiment, a sealing rib is provided at a connection between the first gas collecting channel 131 and the gas outlet 125 of the front battery section 111; and/or, a sealing rib is arranged at the joint between the second gas collecting groove 132 and the gas inlet 124 of the rear battery section 113, the sealing rib can be made of elastic materials such as rubber and the like, and can also be realized by embedded installation of a metal elastic sheet, or by other structures that can achieve a sealing effect without affecting the power output of the battery assembly 1, so that when the separators 13 and the plurality of single cells 12 are mounted in a stack, the effective sealing of the joint between the first gas collecting groove 131 and the gas outlet 125 of the front battery section 111 and/or the joint between the second gas collecting groove 132 and the gas inlet 124 of the rear battery section 113 is achieved on the basis of not damaging the installation rapidity, so that the reaction gas and/or the reaction liquid is prevented from flowing out from the joint to the housing, and the liquid is also prevented from flowing into the battery assembly 1 from the joint.
In the present embodiment, the first gas collecting channel 131 and the second gas collecting channel 132 are arranged to increase the flow rate of the reaction gas and/or the reaction liquid to a certain extent, but further, referring to fig. 2, in the present embodiment, the first gas collecting channel 131 and the second gas collecting channel 132 are communicated through a channel hole 133, wherein a section of the channel hole 133 close to the first gas collecting channel 131 is arranged in a gradually expanding manner in a direction close to the first gas collecting channel 131; and/or a section of the passage hole 133 close to the second gas collecting groove 132 is arranged in a divergent manner in a direction close to the second gas collecting groove 132. Taking the first gas collecting channel 131 as an example, the passage hole 133 is communicated to the lower sidewall of the first gas collecting channel 131, and the divergent arrangement is further beneficial to guiding the gas-liquid mixture in the first gas collecting channel 131 to the passage hole 133 along the same direction, so as to prevent the reaction liquid in the gas-liquid mixture from accumulating at the first gas collecting channel 131 and flowing back to the front cell segment 111. In addition, the lower sidewall of the first gas collecting groove 131 may be inclined gradually downward in a direction approaching the passage hole 133 to further accelerate the flow of the gas-liquid mixture.
Further, in this embodiment, the closed proton exchange membrane fuel cell 100 further includes a check valve 3, where the check valve 3 is disposed between the second gas collecting groove 132 and the gas inlet 124 of the rear cell segment 113, and is used to limit the reaction gas and/or the reaction liquid from entering the second gas collecting groove 132 from the gas inlet 124 of the rear cell segment 113, so as to facilitate the reaction gas and/or the reaction liquid to enter the rear cell segment 113 to participate in the electrochemical reaction, and improve the utilization rate of the reaction gas of the closed proton exchange membrane fuel cell 100.
In view of the above, the tail gas treatment device 2 may achieve the water discharge operation in the battery assembly 1 by directly discharging the reaction liquid in the gas-liquid mixture or accumulating the free reaction liquid, in an embodiment provided by the present invention, referring to fig. 3, when the battery assembly 1 is formed by stacking a large number of single cells 12, a large amount of reaction liquid accumulates between the single cells 12 in the middle of the battery assembly 1, which is likely to cause a "flooding" phenomenon, and at this time, it is necessary to discharge water by discharging the reaction liquid in the gas-liquid mixture, therefore, preferably, the tail gas treatment device 2 includes a gas-liquid separator 211 and a water collector 212 for obtaining the liquid-removed reaction gas, wherein an input pipe of the gas-liquid separator 211 is communicated with the first gas collecting tank 131 to obtain the gas-liquid mixture through the first gas collecting tank 131 and perform gas-liquid separation, the gas output pipe of the gas-liquid separator 211 is communicated with the second gas collecting groove 132 so as to introduce the separated reaction gas into the rear battery section 113 through the second gas collecting groove 132, and the liquid output pipe of the gas-liquid separator 211 is communicated with the water collector 212 so as to intensively treat the separated reaction liquid. When the combination of the plurality of partition plates 13, the plurality of gas-liquid separators 211 and the plurality of water collectors 212 is provided, the problem of excessive reaction liquid is gradually solved in the gas-liquid circulation process, the utilization rate of the reaction gas is improved, and the reaction gas in the battery assembly 1 is more uniformly circulated and distributed, so that the efficient operation of the battery assembly 1 under a certain excess coefficient is realized.
Further, in an embodiment, a liquid absorbing structure 112a may be additionally disposed at a section of the accelerating section 112 close to the second gas collecting channel 132, and the liquid absorbing structure 112a is used for further absorbing the residual reaction liquid in the liquid-removed reaction gas to improve the purity of the reaction gas in the liquid-removed reaction gas in response to abnormal conditions such as incomplete gas-liquid separation or failure of the gas-liquid separator 211. The liquid absorbing structure 112a may be embodied as a water absorbing layer made of a material such as sponge or water absorbing resin, which is disposed in the gas-liquid passage 11, for example.
On the other hand, when the battery assembly 1 is formed by stacking a small number of the single cells 12 or the battery assembly 1 is at the end, the battery assembly 1 is prone to have a problem that the amount of water in the reaction region is insufficient but the amount of free water outside the reaction region is large, and in this case, the free reaction liquid needs to be accumulated to drain the water, and the battery assembly 1 is first defined to include the tail end single cell 12a located on the front side in the flow direction; preferably, the tail gas treatment device 2 includes a pulse blower 22, the pulse blower 22 is configured to obtain the liquid-gathering reaction gas, wherein an input pipe of the pulse blower 22 is communicated with the exhaust port 125 of the tail end cell 12a, an output pipe of the pulse blower 22 is communicated with the gas-liquid channel 11, and the pulse blower 22 realizes respective three-way gas-liquid communication, for example, through a three-way valve 4. The pulse blower 22 is configured to intermittently introduce the gas-liquid mixture, which is excessively reacted in the tail end unit cell 12a, into the cell assembly 1, so that a reaction liquid in the gas-liquid mixture is deionized water, and the deionized water can achieve a humidification function after entering the cell assembly 1, thereby achieving a purpose of self-humidification of a part of the unit cells 12; in addition, the reaction gas in the gas-liquid mixture continuously participates in the reaction after entering the cell assembly 1, so that the retention or backflow at the tail end single cell 12a is avoided, the reaction gas in the cell assembly 1 is fully utilized, and the stable operation of the closed proton exchange membrane fuel cell 100 is ensured.
Furthermore, in order to reduce the accumulation of heat during the operation of the battery assembly 1, the battery assembly 1 generally has a heat dissipation channel 14, and the separator 13 is provided with a cooling structure 134, wherein the cooling structure 134 acts on the heat dissipation channel 14 to accelerate the heat dissipation of the battery assembly 1. The cooling structure 134 may be embodied as a cooling channel disposed in communication with the heat dissipation channel 14, for example, to increase the circulation time of hot air to achieve sufficient heat dissipation, or to extend the circulation path of a cooling liquid to continuously dissipate heat over a large area of the battery assembly 1.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A closed proton exchange membrane fuel cell comprising:
the battery pack is internally provided with a gas-liquid channel, the gas-liquid channel comprises a front battery section, an acceleration section and a rear battery section which are sequentially formed along the flowing direction of the gas-liquid channel, and the acceleration section is used for accelerating reaction gas and/or reaction liquid output from the front battery section to pass through and enter the rear battery section; and the number of the first and second groups,
the tail gas treatment device is used for acting on the reaction gas and/or the reaction liquid in the acceleration section to obtain liquid-removing reaction gas or liquid-gathering reaction gas;
the battery assembly comprises a plurality of single batteries and partition plates which are sequentially stacked in the flow direction, each single battery is provided with a reaction cavity, and the reaction cavities of the single batteries are sequentially communicated to form the gas-liquid channel; the partition plate is clamped between two adjacent monocells in the monocells to divide the gas-liquid channel into the front cell section and the rear cell section, and the shape of the partition plate is matched with the shape of a clamping surface of the two monocells; the partition board is provided with a first gas collecting groove communicated with the gas exhaust port of the front battery section and a second gas collecting groove communicated with the gas inlet port of the rear battery section, and the first gas collecting groove and the second gas collecting groove are communicated with each other to form the accelerating section;
the tail gas treatment device comprises a gas-liquid separator and a water collector and is used for obtaining the liquid-removing reaction gas, an input pipe of the gas-liquid separator is communicated with the first gas collecting groove, a gas output pipe of the gas-liquid separator is communicated with the second gas collecting groove, and a liquid output pipe of the gas-liquid separator is communicated with the water collector; and/or the presence of a gas in the gas,
the battery assembly includes a trailing end cell located on a flow direction front side; the tail gas treatment device comprises a pulse blower, wherein the pulse blower is used for obtaining the liquid gathering reaction gas, an input pipe of the pulse blower is communicated with an exhaust port of the tail end single cell, and an output pipe of the pulse blower is communicated with the acceleration section.
2. The closed proton exchange membrane fuel cell according to claim 1 wherein said separator is made of a conductive material.
3. The closed proton exchange membrane fuel cell according to claim 1, wherein a sealing rib is provided at a connection between the first gas collecting channel and the exhaust port of the front cell segment; and/or the presence of a gas in the gas,
and a sealing rib is arranged at the joint between the second gas collecting groove and the gas inlet of the rear battery section.
4. The closed proton exchange membrane fuel cell according to claim 1 wherein the first gas collecting channel and the second gas collecting channel are communicated through a passage hole, wherein:
a section of the channel hole close to the first gas collecting groove is arranged in a gradually expanding manner in the direction close to the first gas collecting groove; and/or the presence of a gas in the gas,
and one section of the channel hole close to the second gas collecting groove is arranged in a gradually expanding manner in the direction close to the second gas collecting groove.
5. The closed proton exchange membrane fuel cell according to claim 1, further comprising a check valve disposed between the second gas-collecting channel and the gas inlet of the rear cell segment for restricting the reaction gas and/or reaction liquid from entering the second gas-collecting channel from the gas inlet of the rear cell segment.
6. The closed proton exchange membrane fuel cell according to claim 1, wherein a liquid suction structure is disposed at the accelerating section near the second gas collecting groove, and the liquid suction structure is used for sucking residual reaction liquid in the liquid-removed reaction gas.
7. The closed proton exchange membrane fuel cell according to claim 1 wherein said cell assembly has heat sink channels;
the separator is provided with a cooling structure that acts on the heat dissipation channel to accelerate heat dissipation of the battery assembly.
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