CN114784322A - Proton exchange membrane fuel cell thermal management system and working method - Google Patents
Proton exchange membrane fuel cell thermal management system and working method Download PDFInfo
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- CN114784322A CN114784322A CN202210225722.1A CN202210225722A CN114784322A CN 114784322 A CN114784322 A CN 114784322A CN 202210225722 A CN202210225722 A CN 202210225722A CN 114784322 A CN114784322 A CN 114784322A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
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- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04037—Electrical heating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04052—Storage of heat in the fuel cell system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
- H01M8/04302—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during start-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
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Abstract
The invention discloses a proton exchange membrane fuel cell heat management system and a working method thereof. The fuel cell thermal management system comprises a fuel cell stack, an ultrathin soaking plate, a water cooling module, a heat preservation heating module and a control module. The fuel cell stack is characterized in that slots are formed in the bipolar plates of the fuel cell stack, the heat conduction sections of the ultrathin soaking plates are embedded in the slots, and the temperature control sections of two adjacent ultrathin soaking plates are respectively connected with the cooling module and the heat preservation and heating module. The fuel cell thermal management system utilizes the temperature equalizing characteristic of the ultrathin soaking plate and the latent heat storage characteristic of the composite phase change material and is matched with the control module to realize efficient thermal management of the fuel cell stack. The fuel cell heat management system provided by the invention has the advantages of reliable and flexible system, uniform and stable cell temperature distribution, high-efficiency and energy-saving heat regulation and control and the like.
Description
Technical Field
The invention relates to the field of heat management of proton exchange membrane fuel cells, in particular to a heat management system of a proton exchange membrane fuel cell based on an ultrathin soaking plate and a composite phase-change material and a working method.
Background
The proton exchange membrane fuel cell is a device for directly converting chemical energy of reactants into electric energy, has the characteristics of high energy density, low environmental pollution, abundant and renewable fuel, is widely concerned, is known as the ultimate energy of the 21 st century, and has wide application prospect. In practical application, 40% -60% of chemical energy of fuel is converted into electric energy, and most of the rest energy is converted into heat energy. If the heat can not be discharged in time, the temperature of the system can continuously rise, the phenomenon of over-temperature of local areas in the single battery or the electric pile occurs, and the normal work of the fuel battery is seriously influenced. When the temperature of the proton exchange membrane reaches above 80 ℃, the thermal stability and the proton conductivity of the proton exchange membrane are reduced, and the phenomenon of membrane dehydration occurs in severe cases, so that the conductivity is reduced rapidly. When the temperature of the proton exchange membrane is higher than 130 ℃, irreversible damage can be caused to the membrane, and local hot spots can cause perforation of the membrane, thereby finally influencing the safety of the operation of the galvanic pile. At the same time, too high a temperature of the cell accelerates the decay of the catalyst.
The current heat management technology of proton exchange membrane fuel cells, such as patent application CN201810662690.5, discloses a liquid-cooled module for heat transfer and temperature equalization of high-power fuel cells, which consists of a fuel cell stack, a cooling liquid flow channel, an ultrathin temperature equalization plate, a liquid storage tank, a circulating liquid pump and a heating device; the liquid storage tank, the circulating liquid pump and the heating device are sequentially connected in series through a cooling liquid flow passage to form a heat transfer temperature-equalizing circulating loop; the cooling liquid flow channel passes through the condensation ends of the ultrathin temperature-equalizing plates of the fuel cell stacks arranged at intervals; the two sides of the membrane electrode are respectively provided with an ultrathin temperature-equalizing plate, and the membrane electrodes and the ultrathin temperature-equalizing plates are alternately arranged; the hollow cavity of the ultra-thin uniform temperature plate is arranged in the shell, the shell extends out of at least one end of the shell, the uniform temperature plate is adopted to transmit temperature and is cooled or heated by cooling liquid, and the patent application CN201820980615.9 discloses a liquid cooling device applied to heat transfer and uniform temperature of a high current density fuel cell. These patented technologies do not address low temperature start-up or use indirect heating with heated coolant, which results in system real-time deficiencies and does not recycle the heat generated by the stack operation.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a proton exchange membrane fuel cell thermal management system based on an ultrathin soaking plate and a composite phase change material, which can ensure that a proton exchange membrane fuel cell stack is uniformly in a proper temperature range in the operation process, store heat to realize rapid cold start of the stack and prevent the stack from being damaged by overhigh local temperature so as to optimize the thermal management of the proton exchange membrane fuel cell and improve the performance of the proton exchange membrane fuel cell.
The invention is realized by at least one of the following technical schemes.
A proton exchange membrane fuel cell thermal management system based on an ultrathin soaking plate and a composite phase-change material comprises a fuel cell stack, the ultrathin soaking plate, a water cooling module, a heat-preservation heating module and a control module.
The fuel cell stack comprises a plurality of single cells which are connected in series, each single cell comprises a membrane electrode and a bipolar plate, a slot is arranged in each bipolar plate, the ultrathin soaking plate is embedded in the slot of each bipolar plate, the bipolar plate end plate is arranged on the outer side of the fuel cell stack, and a temperature sensor is arranged in the fuel cell stack;
the water cooling module and the heat-insulating heating module are respectively positioned at two sides of the galvanic pile, and two adjacent ultrathin soaking plates are respectively connected with the water cooling module and the heat-insulating heating module;
the heat-preservation heating module comprises a heat-preservation shell, a heating rod and a phase-change material, wherein the heating rod and the phase-change material are arranged in the heat-preservation shell;
the control module is connected with the water cooling module and the heat preservation and heating module and used for controlling the flow rate of cooling fluid and the power of the heating rod.
Preferably, each ultrathin soaking plate comprises a heat conduction section and a temperature control section, the heat conduction section is positioned in the bipolar plate, and the temperature control section is connected with the water cooling module or the heat preservation heating module. The temperature control section accounts for 15% -20% of the whole area of the ultrathin soaking plate.
Preferably, the ultrathin soaking plate comprises an upper shell plate, a lower shell plate, a liquid absorbing core, a supporting body and a working medium, wherein a hollow cavity is formed between the upper shell plate and the lower shell plate in a sealing mode and supported by the supporting body, and the working medium and the liquid absorbing core are arranged in the hollow cavity.
Preferably, the working medium is any one or a mixture of methanol, ethanol, acetone, deionized water, ammonia and freon.
Preferably, the upper shell plate and the lower shell plate are made of any one of copper, aluminum, copper alloy and aluminum alloy.
Preferably, the liquid absorption core is a sintered copper powder column wire mesh composite liquid absorption core, a sintered copper wire mesh woven belt composite liquid absorption core or a sintered copper powder column wire mesh woven belt liquid absorption core.
Preferably, the thickness of the ultrathin soaking plate is 0.6-1 mm.
Preferably, the water cooling module comprises an aluminum or aluminum alloy shell and an internal water flow cavity, the two ends of the water cooling module are respectively provided with a water inlet and a water outlet, the water inlet is provided with a valve, the valve is connected with the control module, and the shell is provided with a slot for embedding the temperature control section of the vapor chamber.
Preferably, the phase-change material in the heat-insulating and heating module consists of 80-90% of paraffin and 10-20% of expanded graphite by mass fraction, wherein the melting point of the paraffin is 60-80 ℃.
Preferably, the invention provides a working method of the hydrogen fuel cell thermal management system based on the ultrathin soaking plate and the composite phase change material, which comprises the following steps:
when the temperature T of the electric pile is lower than a first preset temperature T1When the heat-preservation heating module is used, the phase-change material of the heat-preservation heating module releases latent heat, and the latent heat is introduced into the fuel cell stack through the ultrathin soaking plate and is used for preserving the heat of the fuel cell stack;
the temperature sensor collects the temperature T of the fuel cell stack in real time, and when the temperature T of the fuel cell stack is higher than a second preset temperature T2When the temperature control section of the ultrathin soaking plate is cooled, the control module increases the water flow speed of the water cooling module to accelerate the cooling, and the phase-change material in the heat-insulating heating module absorbs and stores the heat of the fuel cell stack;
when the fuel cell stack is in cold start, the temperature T in the stack is collected to be lower than a first preset temperature T1When the heating device is used, the phase-change material in the heat-insulating and heating module releases heat to improve the temperature of the fuel cell stack, the control module increases the heating power of the heating rod in the heat-insulating and heating module so as to improve the temperature of the temperature control section of the ultrathin soaking plate, and the temperature control section transmits the heat to the heat conduction section so as to improve the temperature of the fuel cell stack.
Compared with the prior art, the invention at least has the following beneficial effects:
1. the system is reliable and flexible: the invention uses the ultrathin soaking plate to control the temperature of the galvanic pile, does not need to cool a flow field, can effectively improve the space utilization rate of the galvanic pile and simplify the integral structure of the galvanic pile. Meanwhile, the system adopts a modular design, is convenient for high-efficiency control and fault monitoring, has a quick start response capability, can effectively reduce the fault rate of system operation, and can replace and upgrade each module;
2. the temperature distribution of the galvanic pile is uniform and stable: according to the invention, the excellent temperature-equalizing characteristic of the ultrathin soaking plates is fully utilized, the soaking plates are arranged on all the monocells, the occurrence of local high-temperature points is avoided, and the uniform distribution of the temperature in the galvanic pile is realized;
3. the heat regulation is efficient and energy-saving: based on the working mode, the excellent temperature equalizing characteristic of the ultrathin soaking plate is utilized to lead out or lead in heat from the galvanic pile, and meanwhile, the heat storage characteristic of the composite phase-change material is utilized, so that the heat is recycled and stored at the high temperature of the galvanic pile, the latent heat is released at the low temperature, the energy consumption of the system is reduced, and the efficient real-time stable regulation and control of the temperature of the galvanic pile are realized;
drawings
In order to illustrate embodiments of the invention or solutions in the prior art more clearly, the drawings that are needed in the description of the embodiments or solutions in the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the invention, and for a person skilled in the art, without inventive effort, other drawings may be obtained from these drawings, in which:
FIG. 1 is a general diagram of a PEM fuel cell thermal management system according to the present invention;
FIG. 2 is an exploded view of a PEMFC thermal management system according to the present invention;
FIG. 3 is a schematic view of a water cooling module according to the present invention;
FIG. 4 is a schematic view of a thermal insulating and heating module provided by the present invention;
fig. 5 is a flow chart of a control method of the thermal management system of the pem fuel cell according to the present invention.
The device comprises a bipolar plate end plate 1, a bipolar plate 2, a bipolar plate 3, a membrane electrode 4, an ultrathin soaking plate 5, a water cooling module 6 and a heat preservation and heating module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
In addition, the descriptions related to "first", "second", etc. in the present invention are used for descriptive purposes only, do not specifically refer to an order or sequence, and do not limit the present invention, but merely distinguish components or operations described in the same technical terms, and are not to be construed as indicating or implying any 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, 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.
As shown in fig. 1 to 4, the invention provides a thermal management system for a proton exchange membrane fuel cell, which comprises a fuel cell stack, an ultrathin soaking plate 4, a water cooling module 5, a heat preservation and heating module 6 and a control module.
The fuel cell stack comprises a plurality of single cells which are connected in series, each single cell comprises a membrane electrode 2 and a bipolar plate 3, a slot is arranged in each bipolar plate 3, an ultrathin soaking plate 4 is embedded in each slot of each bipolar plate 3, a bipolar plate end plate 1 is arranged on the outer side of the fuel cell stack, and a temperature sensor is arranged in the fuel cell stack.
In some embodiments of the present invention, the ultra-thin soaking plates 4 include a heat conducting section and a temperature control section, the heat conducting section is inserted into the slot, the temperature control section is exposed out of the electric pile, and two adjacent ultra-thin soaking plates 4 are respectively connected with the water cooling module 5 and the heat preservation and heating module. The water cooling module 5 is positioned above the galvanic pile, the heat preservation and heating module 6 is positioned below the galvanic pile, and the temperature control sections of two adjacent ultrathin soaking plates 4 are respectively exposed at the upper part and the lower part of the galvanic pile and are respectively inserted into the water cooling module 5 and the heat preservation and heating module 6.
And the control module is connected with the water cooling module 5 and the heat-preservation heating module 6 and is used for controlling the flow rate of cooling fluid and the power of the heating rod.
In some embodiments of the invention, the temperature control section occupies 20% of the whole area of the ultrathin soaking plate 4. The area ratio of the temperature control section is determined from the angle of temperature control effect and material and space saving, and when the ratio of the temperature control section is 15-20%, the material and space can be saved while the temperature control effect is ensured.
In some embodiments of the invention, the heat conducting section of the ultrathin soaking plate 4 in contact with the galvanic pile is coated with heat conducting silicone grease to reduce the heat resistance.
In some embodiments of the present invention, the ultra-thin soaking plate 4 comprises an upper shell plate, a lower shell plate, a wick, a support body and a working medium, wherein the peripheries of the upper shell plate and the lower shell plate are connected and sealed through high temperature brazing and are supported by the support body to form a shell structure with a hollow cavity, and the working medium and the wick are arranged in the hollow cavity.
In this embodiment, the upper and lower shell plates are made of copper. The supporting body is a copper columnar structure as the shell, and the working medium is deionized water.
In some embodiments of the invention, the wick is a sintered copper powder mesh woven belt composite wick structure. The sintered copper powder column wire mesh woven belt liquid absorption core has the advantages of higher production efficiency, lower cost, better capillary performance due to higher porosity, smaller influence of gravity when used in the direction opposite to the gravity direction, and contribution to bubble escape and reduction of reflux resistance of a liquid working medium.
In some embodiments of the invention, the supporting columns used by the ultrathin soaking plate 4 are arranged in a square matrix manner with a cylindrical structure, and the square arrangement mode can effectively reduce the shell plate collapse phenomenon and reduce the motion resistance of internal steam.
In some embodiments of the present invention, the thickness of the ultra-thin soaking plate 4 is 0.6mm, and an excessively thick soaking plate may increase the size of the stack, for example, in some vehicle-mounted occasions, the volume and weight are required to be reduced, and the space is saved.
In some embodiments of the present invention, the water cooling module 5 includes a housing, a water flow cavity is disposed inside the housing, a water inlet and a water outlet are respectively disposed at two ends of the water flow cavity, a valve is disposed on the water inlet, and the valve is connected to the control module. The control module changes the flow rate of the cooling water through the control valve.
In some embodiments of the present invention, the housing of the water cooling module 5 is made of aluminum alloy. The shell is provided with a soaking plate groove for embedding the condensing end of the soaking plate, and the soaking plate is inserted into the soaking plate groove and only contacts with the water-cooled shell but not contacts with water. And the temperature control section of the ultrathin soaking plate inserted into the water cooling module is coated with heat-conducting silicone grease to reduce the thermal resistance.
In some embodiments of the present invention, the insulating and heating module 6 comprises an aluminum alloy insulating shell, and a phase change material and a heating rod filled inside, and the heating rod is connected with the control module. The phase-change material consists of 90% of paraffin and 10% of expanded graphite by mass, wherein the melting point of the paraffin is 80 ℃, and the proportion can improve the latent heat storage capacity of the heat-preservation heating module and ensure good thermal conductivity and formability. The control module can control the heating power of the heating rod.
In some embodiments of the present invention, the phase change material in the heat-insulating and heating module 6 is prepared by: heating and stirring the low-melting-point paraffin and the expanded graphite in a water bath at 80 ℃ for 1h until the molten paraffin is fused into gaps of the expanded graphite, placing the cooled paraffin-expanded graphite mixture into a heat-insulating shell, integrally pressing and molding the mixture with a heating rod wrapped by a graphene film, heating the whole to 80 ℃ by the heating rod when assembling with a stack, and inserting the whole into a temperature control section of a soaking plate wrapped by the graphene film.
In some embodiments of the present invention, the operating method of the proton exchange membrane fuel cell is:
when the temperature T of the electric pile is lower than a first preset temperature T1During the process, the phase change material of the heat-preservation heating module 6 releases latent heat, and the latent heat is introduced into the fuel cell stack through the ultrathin soaking plate 4 and is used for preserving the heat of the fuel cell stack;
the temperature sensor collects the temperature T of the fuel cell stack in real time, and when the temperature T of the fuel cell stack is higher than a second preset temperature T2When the temperature control section of the ultrathin soaking plate 4 is cooled, the control module increases the water flow speed of the water cooling module 5 to accelerate the cooling, and the phase-change material in the heat-insulating heating module 6 absorbs and stores the heat of the fuel cell stack;
when the fuel cell stack is in cold start, the temperature T in the stack is collected to be lower than a first preset temperature T1During the time, phase change material in the heating module 6 that keeps warm releases the temperature of heat in order to improve the fuel cell pile, control module increase heating rod's in the heating module 6 that keeps warm heating power is in order to improve the temperature of ultra-thin soaking plate 4 accuse temperature section, the accuse temperature section transmits the heat to the heat conduction section to promote the temperature of fuel cell pile.
A first preset temperature T1And a second preset temperature T2Is selected according to the optimal operating temperature of the stack, and in some embodiments of the invention, the first preset temperature T1At 60 deg.C, a second preset temperature T2The value was 80 ℃.
The temperature of each part of the hydrogen fuel cell stack is uniformly kept in the optimal interval through the process, the stack is quickly and cold started by storing heat, the local temperature in the stack is prevented from being overhigh, and the thermal management of the stack is optimized to improve the performance of the stack.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A proton exchange membrane fuel cell thermal management system is characterized in that: the device comprises a fuel cell stack, an ultrathin soaking plate (4), a water cooling module (5), a heat preservation heating module (6) and a control module;
the fuel cell stack comprises a plurality of single cells which are connected in series, each single cell comprises a membrane electrode (2) and a bipolar plate (3), slots are arranged in the bipolar plates (3), the ultrathin soaking plates (4) are embedded in the slots of the bipolar plates (3), the bipolar plate end plate (1) is arranged on the outer side of the fuel cell stack, and a temperature sensor is further arranged in the fuel cell stack;
the water-cooling module (5) and the heat-insulating heating module (6) are respectively positioned at the upper side and the lower side of the fuel cell stack, and two adjacent ultrathin soaking plates (4) are respectively connected with the water-cooling module (5) and the heat-insulating heating module (6);
the heat-preservation heating module (6) comprises a heat-preservation shell, a heating rod and a phase-change material, wherein the heating rod and the phase-change material are arranged in the heat-preservation shell;
and the control module is connected with the water cooling module (5) and the heat-preservation heating module (6) and is used for controlling the flow rate of cooling fluid and the power of the heating rod.
2. The pem fuel cell thermal management system of claim 1 wherein: the ultrathin soaking plate (4) comprises a heat conduction section and a temperature control section, the heat conduction section is embedded in the bipolar plate (3), the temperature control section is connected with the water cooling module (5) or the heat preservation and heating module (6), and the temperature control section accounts for 15% -20% of the whole area of the ultrathin soaking plate (4).
3. The pem fuel cell thermal management system of claim 1, wherein: the ultrathin soaking plate (4) comprises an upper shell plate, a lower shell plate, a liquid absorbing core, a supporting body and a working medium, wherein a hollow cavity is formed between the upper shell plate and the lower shell plate in a sealing mode and supported by the supporting body, and the working medium and the liquid absorbing core are arranged in the hollow cavity.
4. A proton exchange membrane fuel cell thermal management system as claimed in claim 3, wherein: the working medium is any one or a mixture of a plurality of methanol, ethanol, acetone, deionized water, ammonia and freon.
5. A proton exchange membrane fuel cell thermal management system as claimed in claim 3, wherein: the upper shell plate and the lower shell plate are made of any one of copper, aluminum, copper alloy and aluminum alloy.
6. A proton exchange membrane fuel cell thermal management system as claimed in claim 3, wherein: the liquid absorption core is a sintered copper powder column wire mesh composite liquid absorption core, a sintered copper wire mesh woven belt composite liquid absorption core or a sintered copper powder column wire mesh woven belt liquid absorption core.
7. The pem fuel cell thermal management system of claim 1, wherein: the thickness of the ultrathin soaking plate (4) is 0.6-1 mm.
8. The pem fuel cell thermal management system of claim 1, wherein: the water cooling module (5) comprises a shell and an internal water flow cavity, a water inlet and a water outlet are respectively formed in two ends of the water cooling module (5), a valve is arranged on the water inlet and connected with the control module, and a slot for embedding a temperature control section of the vapor chamber is formed in the shell.
9. The pem fuel cell thermal management system of claim 1, wherein: the phase-change material in the heat-insulation heating module consists of 80-90% of paraffin and 10-20% of expanded graphite by mass, and the melting point of the paraffin is 60-80 ℃.
10. The operating method of the proton exchange membrane fuel cell thermal management system according to claim 1, wherein:
when the temperature T of the electric pile is lower than a first preset temperature T1During the process, the phase change material of the heat preservation heating module (6) releases latent heat, and the latent heat is introduced into the fuel cell stack through the ultrathin soaking plate (4) and is used for preserving the heat of the fuel cell stack;
the temperature sensor collects the temperature of the fuel cell stack in real time, and when the temperature T of the fuel cell stack is higher than a second preset temperature T2When the temperature control section of the ultrathin soaking plate (4) is cooled, the control module increases the water flow speed of the water cooling module (5) to accelerate the cooling, and the phase-change material in the heat-insulating and heating module (6) absorbs and stores the heat of the fuel cell stack;
when the fuel cell stack is in cold start, the temperature T in the stack is collected to be lower than a first preset temperature T1When the heating device is used, the phase-change material in the heat-insulating and heating module (6) releases heat to improve the temperature of the fuel cell stack, the control module increases the heating power of the heating rod in the heat-insulating and heating module (6) so as to improve the temperature of the temperature control section of the ultrathin soaking plate (4), and the temperature control section transmits the heat to the heat conduction section so as to improve the temperature of the fuel cell stack.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115395045A (en) * | 2022-07-31 | 2022-11-25 | 天津大学 | Heat management system and control method for starting and running of high-temperature PEMFC (proton exchange membrane fuel cell) for vehicle |
| CN116914181A (en) * | 2023-08-28 | 2023-10-20 | 南方电网电力科技股份有限公司 | Vapor chamber and vapor chamber for thermal management of fuel cells |
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2022
- 2022-03-07 CN CN202210225722.1A patent/CN114784322A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115395045A (en) * | 2022-07-31 | 2022-11-25 | 天津大学 | Heat management system and control method for starting and running of high-temperature PEMFC (proton exchange membrane fuel cell) for vehicle |
| CN115395045B (en) * | 2022-07-31 | 2023-09-22 | 天津大学 | Thermal management system and control method for starting and running of high-temperature PEMFC for vehicle |
| CN116914181A (en) * | 2023-08-28 | 2023-10-20 | 南方电网电力科技股份有限公司 | Vapor chamber and vapor chamber for thermal management of fuel cells |
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