CN115882003A - Thermal management module of fuel cell system and control method thereof - Google Patents
Thermal management module of fuel cell system and control method thereof Download PDFInfo
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- CN115882003A CN115882003A CN202111143585.9A CN202111143585A CN115882003A CN 115882003 A CN115882003 A CN 115882003A CN 202111143585 A CN202111143585 A CN 202111143585A CN 115882003 A CN115882003 A CN 115882003A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to the technical field of thermal management of a fuel cell system, and discloses a thermal management module of the fuel cell system and a control method thereof. The heat management module comprises two first hydrogen branches and two cooling liquid branches, wherein each first hydrogen branch is provided with a hydrogen cavity surrounded by a first diaphragm, and each cooling liquid branch is provided with a cooling liquid cavity; every cooling liquid chamber forms the regulation chamber with a hydrogen chamber respectively, and every inside of adjusting the chamber all is equipped with the second diaphragm, and the second diaphragm will be adjusted the chamber and cut apart into cooling liquid chamber and hydrogen chamber, and the second diaphragm all has elasticity with first diaphragm, and when the pressure of one in the hydrogen chamber of one regulation chamber and the cooling liquid chamber increases, the second diaphragm can be protruding the volume of locating another inside messenger another one gradually and reduce. The heat management module of the fuel cell system disclosed by the invention can fully utilize the internal energy carried by hydrogen, and avoids the waste of energy.
Description
Technical Field
The invention relates to the technical field of thermal management of fuel cell systems, in particular to a thermal management module of a fuel cell system and a control method thereof.
Background
A fuel cell system is a power generation system that has a fuel cell as a core and is composed of a hydrogen supply circulation system, an air supply system, a fuel cell, a thermal management system, a control system, and the like. In actual operation, in order to store hydrogen more conveniently and reliably, hydrogen is generally stored in a high-pressure hydrogen storage tank, and the maximum storage pressure of hydrogen in the high-pressure hydrogen storage tank is about 70 MPa. When the fuel cell system is actually operated, the working pressure of hydrogen entering the fuel cell is only about 0.3 MPa. At present, a pressure reducing valve is arranged between a hydrogen storage tank and a fuel cell in the industry to achieve the purpose of reducing the pressure of hydrogen from the storage pressure to the working pressure. And at this in-process, the compressed hydrogen in the high-pressure hydrogen storage tank has huge internal energy, and fuel cell also can produce a large amount of heats when moving, and for the radiating function of better realization, current thermal management system includes the radiator, and the radiator can dispel the heat with the heat transfer to the radiator that fuel cell operation in-process produced, has guaranteed that fuel cell can be stable good carry out the output of electric energy, but also has wasted the internal energy that hydrogen carried.
Disclosure of Invention
Based on the above, the present invention provides a thermal management module of a fuel cell system and a control method thereof, which can fully utilize internal energy carried by hydrogen gas, thereby avoiding waste of energy.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat management module of a fuel cell system comprises two first hydrogen branches arranged in parallel and two cooling liquid branches arranged in parallel, wherein an inlet of each first hydrogen branch is communicated with a hydrogen storage tank, an outlet of each first hydrogen branch is communicated with a hydrogen inlet of a fuel cell, an inlet of each cooling liquid branch is communicated with an outlet of cooling liquid of the fuel cell, and an outlet of each cooling liquid branch is communicated with an inlet of the cooling liquid of the fuel cell; each first hydrogen branch is provided with a hydrogen cavity surrounded by a first diaphragm, and each cooling liquid branch is provided with a cooling liquid cavity; each cooling liquid cavity corresponds to one hydrogen cavity and forms an adjusting cavity, the two adjusting cavities are respectively a first adjusting cavity and a second adjusting cavity, a second diaphragm is arranged inside each adjusting cavity, the adjusting cavity is divided into the cooling liquid cavity and the hydrogen cavity by the second diaphragm, the second diaphragm and the first diaphragm are elastic, and when the pressure of one of the hydrogen cavity and the cooling liquid cavity of one adjusting cavity is increased, the second diaphragm can be gradually and convexly arranged inside the other adjusting cavity, so that the volume of the other adjusting cavity is reduced.
As a preferred scheme of the thermal management module of the fuel cell system, each first hydrogen branch is further provided with an air inlet valve and an air outlet valve, the air inlet valve is arranged at an inlet of the hydrogen chamber, and the air outlet valve is arranged at an outlet of the hydrogen chamber.
As a preferable mode of the thermal management module of the fuel cell system, the intake valve and the exhaust valve on each of the first hydrogen branches are configured to be opened by at most one, and the intake valve corresponding to the first regulation chamber and the exhaust valve corresponding to the second regulation chamber are configured to be opened or closed simultaneously, and the exhaust valve corresponding to the first regulation chamber and the intake valve corresponding to the second regulation chamber are configured to be opened or closed simultaneously.
As a preferred scheme of the thermal management module of the fuel cell system, each of the coolant branches is further provided with a liquid inlet valve and a liquid outlet valve, the liquid inlet valve is disposed at an inlet of the coolant cavity, and the liquid outlet valve is disposed at an outlet of the coolant cavity.
As a preferable mode of the thermal management module of the fuel cell system, the liquid inlet valve and the liquid outlet valve on each of the coolant branches are configured to be opened by at most one, and the liquid inlet valve corresponding to the first adjustment chamber and the liquid outlet valve corresponding to the second adjustment chamber are configured to be opened or closed simultaneously, and the liquid outlet valve corresponding to the first adjustment chamber and the liquid inlet valve corresponding to the second adjustment chamber are configured to be opened or closed simultaneously.
As a preferable scheme of the thermal management module of the fuel cell system, the liquid inlet valve is a check valve, and the liquid outlet valve is an electric stop valve.
As a preferred scheme of the thermal management module of the fuel cell system, the thermal management module of the fuel cell system further comprises an upper computer, the upper computer is electrically connected with the air inlet valve, the air outlet valve and the drain valve respectively, and the upper computer is configured to be capable of controlling the opening degrees of the air inlet valve, the air outlet valve and the drain valve respectively.
As a preferred scheme of the thermal management module of the fuel cell system, the thermal management module of the fuel cell system further includes a second hydrogen branch, the second hydrogen branch is connected in parallel with the two first hydrogen branches, and a pressure reducing valve is arranged on the second hydrogen branch.
As a preferable mode of the thermal management module of the fuel cell system, two cooling liquid chambers are adjacently arranged, and the two cooling liquid chambers are separated by a partition plate.
A control method applied to a thermal management module of a fuel cell system according to any one of the above aspects, comprising:
s1, an inlet of the hydrogen cavity of the first adjusting cavity is communicated with the hydrogen storage tank, and an outlet of the hydrogen cavity of the second adjusting cavity is communicated with a hydrogen inlet of the fuel cell;
s2, stopping introducing hydrogen into the hydrogen cavity of the first adjusting cavity after the pressure in the hydrogen cavity of the first adjusting cavity reaches a first preset pressure, and disconnecting the outlet of the hydrogen cavity of the second adjusting cavity from the hydrogen inlet of the fuel cell; an outlet of the cooling liquid cavity of the first adjusting cavity is communicated with an inlet of the cooling liquid of the fuel cell, and an inlet of the cooling liquid cavity of the second adjusting cavity is communicated with an outlet of the cooling liquid of the fuel cell;
s3, after the cooling liquid cavity of the second adjusting cavity is filled with cooling liquid, stopping introducing the cooling liquid into the inlet of the cooling liquid cavity of the second adjusting cavity, and disconnecting the outlet of the cooling liquid cavity of the first adjusting cavity from the outlet of the cooling liquid of the fuel cell; the inlet of the hydrogen cavity of the second regulating cavity is communicated with the hydrogen storage tank, and the outlet of the hydrogen cavity of the first regulating cavity is communicated with the hydrogen inlet of the fuel cell;
s4, stopping introducing hydrogen into the hydrogen cavity of the second regulating cavity after the pressure in the hydrogen cavity of the second regulating cavity reaches a second preset pressure, and disconnecting the outlet of the hydrogen cavity of the first regulating cavity from the hydrogen inlet of the fuel cell; an outlet of the cooling liquid cavity of the second adjusting cavity is communicated with an inlet of the cooling liquid of the fuel cell, and an inlet of the cooling liquid cavity of the first adjusting cavity is communicated with an outlet of the cooling liquid of the fuel cell;
and S5, after the cooling liquid cavity of the first adjusting cavity is filled with cooling liquid, returning to S1.
The invention has the beneficial effects that: the invention discloses a heat management module of a fuel cell system, wherein a hydrogen cavity is surrounded by a first diaphragm, the hydrogen cavity and a cooling liquid cavity are separated by a second diaphragm, when the pressure of the hydrogen cavity of an adjusting cavity is increased, the second diaphragm is deformed to cause the volume of the cooling liquid cavity of the adjusting cavity to be reduced, the pressure of cooling liquid in the cooling liquid cavity is increased, so that the cooling liquid can flow in the fuel cell and be converted into the kinetic energy of the cooling liquid, and when the heat management module is actually operated, the first adjusting cavity and the second adjusting cavity are alternately used, so that the stability and the continuity of the operation are ensured, and the fuel cell can stably and well output electric energy.
The control method of the heat management module of the fuel cell system can transfer the internal energy of the hydrogen to the cooling liquid in the cooling liquid cavity through the second diaphragm, convert the internal energy into the kinetic energy of the cooling liquid, and enable the cooling liquid to flow in the fuel cell, thereby fully utilizing the internal energy carried by the hydrogen and avoiding the waste of energy.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic diagram of a thermal management module of a fuel cell system according to an embodiment of the present invention.
In the figure:
11. a first hydrogen branch; 12. a hydrogen gas chamber; 13. an intake valve; 14. an exhaust valve;
21. a cooling liquid branch; 22. a cooling fluid chamber; 23. a liquid inlet valve; 24. a drain valve;
31. a first diaphragm; 32. a second diaphragm; 33. a partition plate;
40. a first regulation chamber; 50. a second regulation chamber;
61. a second hydrogen branch; 62. a pressure reducing valve.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., 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, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections unless otherwise explicitly stated or limited; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present embodiment provides a thermal management module of a fuel cell system, as shown in fig. 1, including two first hydrogen branches 11 arranged in parallel and two cooling liquid branches 21 arranged in parallel, an inlet of each first hydrogen branch 11 is communicated with a hydrogen storage tank, an outlet of each first hydrogen branch 11 is communicated with a hydrogen inlet of a fuel cell, an inlet of each cooling liquid branch 21 is communicated with an outlet of a cooling liquid of the fuel cell, and an outlet of each cooling liquid branch 21 is communicated with an inlet of a cooling liquid of the fuel cell. Each first hydrogen branch 11 is provided with a hydrogen chamber 12 surrounded by a first diaphragm 31, and each cooling liquid branch 21 is provided with a cooling liquid chamber 22. Every cooling liquid chamber 22 corresponds the setting with a hydrogen chamber 12 respectively and both constitute and adjust the chamber, two are adjusted the chamber and are first regulation chamber 40 and second regulation chamber 50 respectively, every inside of adjusting the chamber all is equipped with second diaphragm 32, second diaphragm 32 will adjust the chamber and split into cooling liquid chamber 22 and hydrogen chamber 12, second diaphragm 32 and first diaphragm 31 all have elasticity, when the pressure increase of one in hydrogen chamber 12 and the cooling liquid chamber 22 in one regulation chamber, second diaphragm 32 can be protruding locate another inside gradually for another's volume reduces.
As shown in fig. 1, the two cooling liquid chambers 22 of the present embodiment are disposed adjacent to each other, and the two cooling liquid chambers 22 are separated by a partition 33. That is, the two coolant chambers 22 are not communicated with each other and the volumes of the two chambers do not affect each other. In other embodiments, the two cooling cavities may also be arranged at intervals, which is selected according to actual needs.
In the thermal management module of the fuel cell system provided by this embodiment, the hydrogen chamber 12 is surrounded by the first diaphragm 31, the hydrogen chamber 12 is separated from the cooling liquid chamber 22 by the second diaphragm 32, when the pressure of the hydrogen chamber 12 of one regulation chamber rises, the second diaphragm 32 deforms, so that the volume of the cooling liquid chamber 22 of the regulation chamber is reduced, the pressure of the cooling liquid in the cooling liquid chamber 22 rises, so that the cooling liquid can flow in the fuel cell and be converted into the kinetic energy of the cooling liquid, and then the cooling liquid can flow in the fuel cell, and in actual operation, the first regulation chamber 40 and the second regulation chamber 50 are alternately used, so that the stability and continuity of operation are ensured, and the fuel cell can stably and well output electric energy.
As shown in fig. 1, each first hydrogen branch 11 is further provided with an intake valve 13 and an exhaust valve 14, the intake valve 13 is disposed at an inlet of the hydrogen chamber 12, the exhaust valve 14 is disposed at an outlet of the hydrogen chamber 12, and the intake valve 13 and the exhaust valve 14 are both electric stop valves, so that the intake valve 13 and the exhaust valve 14 can be automatically controlled. Specifically, the intake valve 13 and the exhaust valve 14 on each first hydrogen branch 11 are configured to be opened by at most one, and the intake valve 13 corresponding to the first regulation chamber 40 and the exhaust valve 14 corresponding to the second regulation chamber 50 are configured to be opened or closed simultaneously, and the exhaust valve 14 corresponding to the first regulation chamber 40 and the intake valve 13 corresponding to the second regulation chamber 50 are configured to be opened or closed simultaneously.
As shown in fig. 1, each coolant branch 21 is further provided with a liquid inlet valve 23 and a liquid outlet valve 24, the liquid inlet valve 23 is disposed at an inlet of the coolant chamber 22, and the liquid outlet valve 24 is disposed at an outlet of the coolant chamber 22. Specifically, the liquid inlet valve 23 and the liquid outlet valve 24 of each coolant branch 21 are configured to be opened by at most one, and the liquid inlet valve 23 corresponding to the first regulation chamber 40 and the liquid outlet valve 24 corresponding to the second regulation chamber 50 are configured to be opened or closed at the same time, and the liquid outlet valve 24 corresponding to the first regulation chamber 40 and the liquid inlet valve 23 corresponding to the second regulation chamber 50 are configured to be opened or closed at the same time.
Specifically, the hydrogen cavity 12 and the cooling liquid cavity 22 defining the first adjustment cavity 40 are respectively a first hydrogen cavity and a first cooling liquid cavity, the liquid inlet valve 23 and the liquid outlet valve 24 of the first adjustment cavity 40 are respectively a first liquid inlet valve and a first liquid outlet valve, the gas inlet valve 13 and the gas outlet valve 14 of the first adjustment cavity 40 are respectively a first gas inlet valve and a first gas outlet valve, the hydrogen cavity 12 and the cooling liquid cavity 22 defining the second adjustment cavity 50 are respectively a second hydrogen cavity and a second cooling liquid cavity, the liquid inlet valve 23 and the liquid outlet valve 24 of the second adjustment cavity 50 are respectively a second gas inlet valve and a second gas outlet valve, the gas inlet valve 13 and the liquid outlet valve 14 of the second adjustment cavity 50 are respectively a second gas inlet valve and a second gas outlet valve, and the operation steps of the thermal management module of the fuel cell system are as follows:
step one, opening a first air inlet valve and a second exhaust valve, wherein the second air inlet valve, the first exhaust valve, the first liquid inlet valve, the second liquid inlet valve, the first exhaust valve and the second exhaust valve are all in a closed state. The pressure of the hydrogen discharged by the hydrogen storage tank is higher, so that the pressure of the hydrogen in the first hydrogen cavity is gradually increased, the volume of the first cooling liquid cavity is gradually reduced, and the pressure of the cooling liquid in the first cooling liquid cavity is gradually increased; along with the outflow of the hydrogen in the second hydrogen chamber, the pressure in the second hydrogen chamber reduces gradually, and the volume in second hydrogen chamber reduces gradually for the volume in second cooling liquid chamber increases gradually, and the pressure of the coolant liquid in the second cooling liquid chamber reduces gradually, and the volume in second cooling liquid chamber resumes to initial condition until the pressure of the coolant liquid in the second cooling liquid chamber reduces to the ordinary pressure.
And step two, after the pressure in the first hydrogen cavity reaches a first preset pressure, closing the first air inlet valve and the second air outlet valve, and opening the first liquid outlet valve and the second liquid inlet valve. At this time, because the pressure of the cooling liquid in the first cooling liquid cavity is higher, the cooling liquid in the first cooling liquid cavity can smoothly flow out through the first liquid discharge valve, the pressure in the first cooling liquid cavity is gradually reduced, the volume of the first hydrogen cavity is gradually increased, and the pressure of the hydrogen in the first hydrogen cavity is gradually reduced; the cooling liquid in the second cooling liquid cavity is gradually increased, the volume of the second cooling liquid cavity is unchanged, and the pressure in the second hydrogen cavity and the pressure in the second cooling liquid cavity are both kept at normal pressure;
and step three, after the second cooling liquid cavity is filled with cooling liquid, closing the first liquid discharging valve and the second liquid inlet valve, and opening the first gas discharging valve and the second gas inlet valve. At the moment, along with the reduction of the hydrogen in the first hydrogen cavity, the pressure in the first hydrogen cavity is gradually reduced, the volume in the first hydrogen cavity is gradually increased, the pressure of the cooling liquid in the first cooling liquid cavity is gradually reduced until the pressure of the cooling liquid in the first cooling liquid cavity is reduced to normal pressure, and the volume of the first cooling liquid cavity is restored to an initial state; the pressure of the hydrogen discharged from the hydrogen storage tank is higher, so that the pressure in the second hydrogen cavity is gradually increased, the volume of the second cooling liquid cavity is gradually reduced, and the pressure of the cooling liquid in the second cooling liquid cavity is gradually increased.
And step four, after the pressure in the second hydrogen cavity reaches a second preset pressure, closing the second air inlet valve and the first exhaust valve, and opening the first liquid inlet valve and the second exhaust valve. Cooling liquid in the first cooling liquid cavity is gradually increased, the volume of the first cooling liquid cavity is unchanged, and the pressure in the first hydrogen cavity and the pressure in the first cooling liquid cavity are kept at normal pressure; along with the outflow of the cooling liquid in the second adjusting cavity 50, the pressure of the cooling liquid in the second cooling liquid cavity is gradually reduced, the volume of the second hydrogen cavity is gradually increased, and the pressure of the hydrogen in the second hydrogen cavity is gradually reduced;
and step five, after the first cooling liquid cavity is filled with cooling liquid, closing the second liquid discharge valve and the first liquid inlet valve, and returning to the step one.
It should be noted that the volume of the second cooling liquid cavity in the first step is restored to the initial state, which means that when the pressures in the second cooling liquid cavity and the second hydrogen cavity are both normal pressure, the actual volume of the second cooling liquid cavity is the actual volume; the volume of the first cooling liquid cavity in the third step is restored to the initial state, which means that the actual volume of the first cooling liquid cavity is the actual volume when the pressures in the first cooling liquid cavity and the first hydrogen cavity are both normal pressures.
This kind of setting can make the heat transfer of coolant liquid to hydrogen, adjust the temperature of hydrogen to the actual operating temperature who more is close to fuel cell, thereby guarantee that the hydrogen that gets into fuel cell satisfies the actual demand, the coolant liquid can get into coolant liquid chamber 22 from the export of fuel cell's coolant liquid, thereby make the coolant liquid pressure in coolant liquid chamber 22 rise, finally make the coolant liquid from coolant liquid chamber 22 through the import of the coolant liquid of feed liquor valve 23 entering fuel cell, make the coolant liquid that flows to in the fuel cell can satisfy the actual demand, thereby guarantee that the thermal management module of fuel cell system can be stable and continuous operation.
The liquid inlet valve 23 of the present embodiment is a check valve, the check valve enables the cooling liquid in the cooling liquid branch 21 to enter only from the inlet of the cooling liquid cavity 22 and flow out from the outlet of the cooling liquid cavity 22 without flowing reversely, and the liquid outlet valve 24 is an electric stop valve, so that the liquid outlet valve 24 can realize automatic control.
The thermal management module of the fuel cell system of the present embodiment further includes an upper computer (not shown in the figure), the upper computer is electrically connected to the intake valve 13, the exhaust valve 14, and the drain valve 24, and the upper computer is configured to be capable of controlling the opening degrees of the intake valve 13, the exhaust valve 14, and the drain valve 24, respectively, so that the intake valve 13, the exhaust valve 14, and the drain valve 24 can be opened, closed, and the opening degree can be adjusted.
Further, as shown in fig. 1, the thermal management module of the fuel cell system of this embodiment further includes a second hydrogen branch 61, the second hydrogen branch 61 is connected in parallel with the two first hydrogen branches 11, an inlet of the second hydrogen branch 61 is communicated with the hydrogen storage tank, an outlet of the second hydrogen branch 61 is communicated with a hydrogen inlet of the fuel cell, and the second hydrogen branch 61 is provided with a pressure reducing valve 62. When the thermal management module of the fuel cell system starts to work without heat dissipation, only the pressure reducing valve 62 is opened, so that the high-pressure hydrogen in the hydrogen storage tank is directly sent into the fuel cell after being reduced in pressure by the pressure reducing valve 62.
The present embodiment also provides a control method for a thermal management module of a fuel cell system, including:
s1, an inlet of a hydrogen cavity 12 of a first adjusting cavity 40 is communicated with a hydrogen storage tank, and an outlet of the hydrogen cavity 12 of a second adjusting cavity 50 is communicated with a hydrogen inlet of a fuel cell;
s2, stopping introducing hydrogen into the hydrogen cavity 12 of the first adjusting cavity 40 after the pressure in the hydrogen cavity 12 of the first adjusting cavity 40 reaches a first preset pressure, and disconnecting the outlet of the hydrogen cavity 12 of the second adjusting cavity 50 from the hydrogen inlet of the fuel cell; the outlet of the cooling liquid cavity 22 of the first adjusting cavity 40 is communicated with the inlet of the cooling liquid of the fuel cell, and the inlet of the cooling liquid cavity 22 of the second adjusting cavity 50 is communicated with the outlet of the cooling liquid of the fuel cell;
s3, after the cooling liquid cavity 22 of the second adjusting cavity 50 is filled with cooling liquid, stopping introducing the cooling liquid into the inlet of the cooling liquid cavity 22 of the second adjusting cavity 50, and disconnecting the outlet of the cooling liquid cavity 22 of the first adjusting cavity 40 from the outlet of the cooling liquid of the fuel cell; the inlet of the hydrogen chamber 12 of the second regulating chamber 50 is communicated with the hydrogen storage tank, and the outlet of the hydrogen chamber 12 of the first regulating chamber 40 is communicated with the hydrogen inlet of the fuel cell;
s4, stopping introducing hydrogen into the hydrogen cavity 12 of the second adjusting cavity 50 after the pressure in the hydrogen cavity 12 of the second adjusting cavity 50 reaches a second preset pressure, and disconnecting the outlet of the hydrogen cavity 12 of the first adjusting cavity 40 from the hydrogen inlet of the fuel cell; the outlet of the cooling liquid cavity 22 of the second adjusting cavity 50 is communicated with the inlet of the cooling liquid of the fuel cell, and the inlet of the cooling liquid cavity 22 of the first adjusting cavity 40 is communicated with the outlet of the cooling liquid of the fuel cell;
and S5, after the cooling liquid cavity 22 of the first adjusting cavity 40 is filled with cooling liquid, returning to S1.
The first preset pressure and the second preset pressure of the embodiment are both greater than the normal pressure, and specific values of the first preset pressure and the second preset pressure are selected according to actual needs.
The control method of the thermal management module of the fuel cell system provided by this embodiment can transfer the internal energy of hydrogen to the coolant in the coolant cavity 22 through the second diaphragm 32, and convert the internal energy into the kinetic energy of the coolant, so that the coolant can flow in the fuel cell, thereby making full use of the internal energy carried by hydrogen and avoiding the waste of energy.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. The thermal management module of the fuel cell system is characterized by comprising two first hydrogen branches (11) arranged in parallel and two cooling liquid branches (21) arranged in parallel, wherein the inlet of each first hydrogen branch (11) is communicated with a hydrogen storage tank, the outlet of each first hydrogen branch (11) is communicated with the hydrogen inlet of a fuel cell, the inlet of each cooling liquid branch (21) is communicated with the outlet of cooling liquid of the fuel cell, and the outlet of each cooling liquid branch (21) is communicated with the inlet of the cooling liquid of the fuel cell;
each first hydrogen branch (11) is provided with a hydrogen cavity (12) enclosed by a first diaphragm (31), and each cooling liquid branch (21) is provided with a cooling liquid cavity (22);
each cooling liquid cavity (22) is respectively arranged corresponding to one hydrogen cavity (12) and forms an adjusting cavity, the two adjusting cavities are respectively a first adjusting cavity (40) and a second adjusting cavity (50), a second diaphragm (32) is arranged inside each adjusting cavity, the adjusting cavity is divided into the cooling liquid cavity (22) and the hydrogen cavity (12) by the second diaphragm (32), the second diaphragm (32) and the first diaphragm (31) are elastic, and when the pressure of one of the hydrogen cavity (12) and the cooling liquid cavity (22) of one adjusting cavity is increased, the second diaphragm (32) can be gradually protruded inside the other adjusting cavity, so that the volume of the other adjusting cavity is reduced.
2. The thermal management module of the fuel cell system according to claim 1, wherein each of the first hydrogen branches (11) is further provided with an air inlet valve (13) and an air outlet valve (14), the air inlet valve (13) is disposed at an inlet of the hydrogen chamber (12), and the air outlet valve (14) is disposed at an outlet of the hydrogen chamber (12).
3. A thermal management module of a fuel cell system according to claim 2, characterized in that the inlet valve (13) and the outlet valve (14) on each first hydrogen branch (11) are configured to be open at most one, and the inlet valve (13) corresponding to the first regulation chamber (40), the outlet valve (14) corresponding to the second regulation chamber (50) are configured to be open or closed simultaneously, and the outlet valve (14) corresponding to the first regulation chamber (40), the inlet valve (13) corresponding to the second regulation chamber (50) are configured to be open or closed simultaneously.
4. The thermal management module of the fuel cell system according to claim 2, wherein each coolant branch (21) is further provided with an inlet valve (23) and an outlet valve (24), the inlet valve (23) is disposed at an inlet of the coolant chamber (22), and the outlet valve (24) is disposed at an outlet of the coolant chamber (22).
5. The thermal management module of a fuel cell system according to claim 4, characterized in that the liquid inlet valve (23) and the liquid outlet valve (24) on each of the coolant branches (21) are configured to be opened by at most one, and the liquid inlet valve (23) corresponding to the first regulation chamber (40) and the liquid outlet valve (24) corresponding to the second regulation chamber (50) are configured to be opened or closed simultaneously, and the liquid outlet valve (24) corresponding to the first regulation chamber (40) and the liquid inlet valve (23) corresponding to the second regulation chamber (50) are configured to be opened or closed simultaneously.
6. The thermal management module of a fuel cell system according to claim 4, characterized in that the liquid inlet valve (23) is a check valve and the liquid outlet valve (24) is an electrically operated shutoff valve.
7. The thermal management module of the fuel cell system according to claim 4, further comprising an upper computer electrically connected to the intake valve (13), the exhaust valve (14), and the drain valve (24), respectively, wherein the upper computer is configured to control the opening degrees of the intake valve (13), the exhaust valve (14), and the drain valve (24), respectively.
8. The thermal management module of the fuel cell system according to claim 1, further comprising a second hydrogen branch (61), wherein the second hydrogen branch (61) is connected in parallel with the two first hydrogen branches (11), and a pressure reducing valve (62) is arranged on the second hydrogen branch (61).
9. A thermal management module of a fuel cell system according to claim 1, characterized in that two cooling liquid chambers (22) are arranged adjacently, the two cooling liquid chambers (22) being separated by a partition (33).
10. A control method applied to a thermal management module of a fuel cell system according to any one of claims 1 to 9, comprising:
s1, an inlet of the hydrogen cavity (12) of the first adjusting cavity (40) is communicated with the hydrogen storage tank, and an outlet of the hydrogen cavity (12) of the second adjusting cavity (50) is communicated with a hydrogen inlet of the fuel cell;
s2, stopping introducing hydrogen into the hydrogen cavity (12) of the first adjusting cavity (40) after the pressure in the hydrogen cavity (12) of the first adjusting cavity (40) reaches a first preset pressure, and disconnecting the outlet of the hydrogen cavity (12) of the second adjusting cavity (50) from the hydrogen inlet of the fuel cell; an outlet of the cooling liquid cavity (22) of the first regulating cavity (40) is communicated with an inlet of the cooling liquid of the fuel cell, and an inlet of the cooling liquid cavity (22) of the second regulating cavity (50) is communicated with an outlet of the cooling liquid of the fuel cell;
s3, after the cooling liquid cavity (22) of the second adjusting cavity (50) is filled with cooling liquid, stopping introducing the cooling liquid into the inlet of the cooling liquid cavity (22) of the second adjusting cavity (50), and disconnecting the outlet of the cooling liquid cavity (22) of the first adjusting cavity (40) from the outlet of the cooling liquid of the fuel cell; the inlet of the hydrogen chamber (12) of the second regulating cavity (50) is communicated with the hydrogen storage tank, and the outlet of the hydrogen chamber (12) of the first regulating cavity (40) is communicated with the hydrogen inlet of the fuel cell;
s4, stopping introducing hydrogen into the hydrogen cavity (12) of the second adjusting cavity (50) after the pressure in the hydrogen cavity (12) of the second adjusting cavity (50) reaches a second preset pressure, and disconnecting the outlet of the hydrogen cavity (12) of the first adjusting cavity (40) from the hydrogen inlet of the fuel cell; an outlet of the cooling liquid cavity (22) of the second regulating cavity (50) is communicated with an inlet of the cooling liquid of the fuel cell, and an inlet of the cooling liquid cavity (22) of the first regulating cavity (40) is communicated with an outlet of the cooling liquid of the fuel cell;
and S5, after the cooling liquid cavity (22) of the first adjusting cavity (40) is filled with cooling liquid, returning to S1.
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| CN202111143585.9A CN115882003A (en) | 2021-09-28 | 2021-09-28 | Thermal management module of fuel cell system and control method thereof |
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| CN202111143585.9A CN115882003A (en) | 2021-09-28 | 2021-09-28 | Thermal management module of fuel cell system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117317295A (en) * | 2023-11-29 | 2023-12-29 | 武汉氢能与燃料电池产业技术研究院有限公司 | Cooling liquid insulation method, insulation device and fuel cell power generation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117317295A (en) * | 2023-11-29 | 2023-12-29 | 武汉氢能与燃料电池产业技术研究院有限公司 | Cooling liquid insulation method, insulation device and fuel cell power generation system |
| CN117317295B (en) * | 2023-11-29 | 2024-02-23 | 武汉氢能与燃料电池产业技术研究院有限公司 | Cooling liquid insulation method, insulation device and fuel cell power generation system |
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