CN113707904B - Self-heating fuel cell automobile cold start heater and heating method - Google Patents
Self-heating fuel cell automobile cold start heater and heating method Download PDFInfo
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- CN113707904B CN113707904B CN202110978707.XA CN202110978707A CN113707904B CN 113707904 B CN113707904 B CN 113707904B CN 202110978707 A CN202110978707 A CN 202110978707A CN 113707904 B CN113707904 B CN 113707904B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 117
- 239000000446 fuel Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 82
- 239000001257 hydrogen Substances 0.000 claims abstract description 55
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 55
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000000843 powder Substances 0.000 claims abstract description 39
- 239000007789 gas Substances 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- 238000006479 redox reaction Methods 0.000 claims abstract description 4
- 239000000498 cooling water Substances 0.000 claims description 23
- 239000008236 heating water Substances 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 238000006722 reduction reaction Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000110 cooling liquid Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000005485 electric heating Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04225—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during start-up
-
- 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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04268—Heating of fuel cells during the start-up of the fuel cells
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention provides a self-heating fuel cell automobile cold start heater and a heating method. The heater comprises a self-heating agent tank body, wherein self-heating agent powder is filled in the inner cavity of the self-heating agent tank body, an air inlet connected with an air compressor is formed in the self-heating agent tank body, and the self-heating agent powder and air entering through the air inlet undergo oxidation-reduction reaction to generate a large amount of heat, so that components to be heated are rapidly heated in a cold starting process; the self-heating agent tank body is provided with a hydrogen inlet connected with a hydrogen path of the fuel cell engine, hydrogen entering through the hydrogen inlet is used for reducing the self-heating agent powder, and the hydrogen is used as a protective gas for sealing and preserving the self-heating agent powder. The invention provides a self-heating fuel cell automobile cold start heater which has the advantages of simple structure, stability, reliability, lower cost and good hydrogen safety, does not damage the whole automobile power system in the whole cold start process, and is suitable for any fuel cell automobile needing cold start in severe cold areas.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a self-heating fuel cell automobile cold start heater and a heating method.
Background
The problem of cold start of fuel cell vehicles is a major problem in practical applications. As a vehicle, it is necessary to have the ability to operate in severe cold climates (e.g., northeast regions of our country). At present, in order to ensure the service life of the system, a fuel cell automobile generally adopts a series-type electric-electric hybrid power system, namely, after a fuel cell engine performs chemical reaction power generation, the generated electric energy is stored in a power cell instead of directly driving the automobile, and then the power cell releases the electric energy to drive the automobile. Therefore, in a severe cold environment, if the whole vehicle power system is expected to be heated, the source of heat energy can only come from electric energy stored in the power battery or chemical energy stored in the high-pressure hydrogen cylinder of the fuel cell vehicle.
Under the prior art system, the starting temperature of the hydrogen fuel cell engine is generally not lower than minus forty degrees, and most hydrogen fuel cell engines cannot be started at a temperature lower than minus thirty degrees, and the low-temperature starting characteristics of the power cells are generally worse than those of the hydrogen fuel cell engines.
Numerous scholars have conducted extensive research to solve the problem of low temperature cold start of fuel cell engines. The first category is to heat the fuel cell engine by means of electrical energy. Many proposals based on this idea have been made by research teams at the university of Qinghua, for example, by driving air compressors in fuel cell engines with electrical energy, realizing energy conversion paths from electrical energy to mechanical energy and finally to thermal energy; for example, based on the concept of a "hydrogen pump", the fuel cell stack is directly heated by electrical energy without damaging the structure and life of the fuel cell stack. The thought can always obtain better experimental results in a laboratory stage, but is difficult in a practical application stage. Fuel cell automobiles have difficulty in obtaining an electric energy source in a severe cold environment because electric energy stored in a power cell cannot be released at a low temperature. For the reasons mentioned above, this concept is still in the laboratory stage.
The second existing concept is to utilize chemical energy stored in a hydrogen cylinder to generate heat. The first fuel cell passenger car Toyota MIRAI in mass production in the world adopts the idea. During cold start, the MIRAI can limit air supply, and simultaneously, a large current load is applied to the electric pile through DC/DC, so that the concentration polarization of the electric pile is very large, the electric pile is at a low voltage level (about 0.08V on a single sheet), the electric power output efficiency is low, and about 94% of the chemical energy of the input hydrogen is converted into heat energy, so that the electric pile is rapidly and self-heated. However, this method requires extremely high robustness of the stack and it is difficult to avoid certain damage to the stack.
Another approach to heating using hydrogen chemical energy is proposed in CN201920565319.7, which is to arrange a hydrogen burner on the vehicle, and directly ignite the hydrogen to obtain heat energy when the fuel cell vehicle needs cold start. The method has the advantages that no damage is caused to the power battery and the fuel battery engine, but the disadvantages that the complexity and the instability of a power system are greatly increased, and the hydrogen safety is not guaranteed sufficiently.
In summary, how to provide a fuel cell engine cold start heater with simple structure, stability, reliability, low cost and good hydrogen safety, so as to avoid damage to the whole vehicle power system in the whole cold start process, and be suitable for any fuel cell vehicle needing cold start in severe cold regions, has become a problem to be solved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a self-heating fuel cell automobile cold start heater, which comprises a self-heating agent tank body, and is characterized in that the inner cavity of the self-heating agent tank body is filled with self-heating agent powder 14, the self-heating agent tank body is provided with an air inlet 2 connected with an air compressor of a fuel cell engine, and the self-heating agent powder 14 and air entering through the air inlet 2 undergo oxidation-reduction reaction to generate a large amount of heat, so that components needing to be heated in the cold start process are rapidly heated; the self-heating agent tank body is provided with a hydrogen inlet 5 connected with a hydrogen path of the fuel cell engine, hydrogen entering through the hydrogen inlet 5 reduces the self-heating agent powder 14, and the self-heating agent powder 14 is hermetically stored by taking the hydrogen as a protective gas for the next time when cold start is needed.
Preferably, the air inlet 2 and the hydrogen inlet 5 are respectively provided with a solenoid valve I3 and a solenoid valve II 6.
Preferably, the self-heating agent tank body is provided with a gas outlet 11, the gas outlet 11 is provided with an electric control back pressure valve 12, and the gas outlet 11, the air inlet 2 and the hydrogen inlet 5 are all provided with a filter screen 4 to prevent the self-heating agent powder 14 from escaping.
Preferably, the self-heating agent tank body is coated with a shell 9, a spiral water channel 7 is arranged between the shell 9 and the self-heating agent tank body, two ends of the spiral water channel 7 are respectively provided with a cooling water inlet 8 and a heating water outlet 15, the cooling water inlet 8 is connected with a cooling water channel of the fuel cell engine, the heating water outlet 15 is connected with an automobile water tank, a cooling water channel electromagnetic valve 17 is arranged on the cooling water inlet 8, and a heating water channel electromagnetic valve 16 is arranged on the heating water outlet 15.
Preferably, the electric heating wires 10 are uniformly distributed in the shell of the self-heating agent tank body, and the shell 9 is coated with a heat insulation layer.
Preferably, the self-heating agent powder 14 is a metal powder, an alloy powder, or a mixture powder. Wherein the features of the self-heating agent powder 14 include: can react with oxygen to release heat rapidly; can be reduced by hydrogen; the melting point is higher, and caking is not easy to occur at high temperature; the cost is controllable; is safe and reliable.
Preferably, the self-heating agent powder 14 is iron powder.
The invention also aims at providing a heating method of the self-heating fuel cell automobile cold start heater, which is characterized by comprising the following steps of:
the first step: opening an electric control back pressure valve 12 to spray out most of hydrogen originally stored in the self-heating agent tank body in a sealing way, and then enabling oxygen in the air to enter the self-heating agent tank body to start reaction heat release;
and a second step of: the electromagnetic valve I3 is opened, so that the contact between the self-heating agent and oxygen is further increased, and the heat release is accelerated;
and a third step of: the cooling water way water pump, the cooling water way electromagnetic valve 17 and the heating water way electromagnetic valve 16 are opened, the cooling liquid is gradually heated, and heat is transferred to the whole vehicle power system;
fourth step: starting the air compressor after the temperature of the power supply rises sufficiently, adjusting the opening of the electric control back pressure valve 12, and controlling the flow and the pressure of air in the self-heating agent cavity by matching with the air compressor;
fifth step: starting formally starting the whole vehicle power system after the temperature of the whole vehicle power system is sufficiently raised;
sixth step: waiting for the vehicle to enter a stable running state, and simultaneously confirming that the vehicle runs in an outdoor ventilation environment;
seventh step: closing the electromagnetic valve I3, the heating waterway electromagnetic valve 16 and the cooling waterway electromagnetic valve 17, stopping the flow of the cooling liquid and fresh air from the air compressor through the self-heating agent tank body, electrifying the heating wire 10, and heating the oxidized self-heating agent powder 14 to the reduction reaction temperature;
eighth step: opening an electromagnetic valve II 6, adjusting the opening of an electric control back pressure valve 12, controlling the flow and pressure of hydrogen in the self-heating agent cavity, and completing the reduction of the self-heating agent powder 14 by using the hydrogen;
ninth step: after the reduction reaction is finished, the electric control back pressure valve 12 is closed, the electromagnetic valve II 6 is closed, and high-purity hydrogen with the sealing pressure higher than the atmospheric pressure in the cavity of the self-heating agent tank is ensured.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a self-heating fuel cell automobile cold start heater and a heating method, which have the advantages of simple structure, stability, reliability, low cost and good hydrogen safety, do not damage the whole automobile power system in the whole cold start process, and are suitable for any fuel cell automobile needing cold start in severe cold areas.
Drawings
FIG. 1 is a cross-sectional view of a self-heating fuel cell vehicle cold start heater of the present invention;
fig. 2 is a flow chart of a heating method of a cold start heater of a self-heating fuel cell vehicle according to the present invention.
The reference numerals in the drawings are:
1-conducting wire, 2-air inlet, 3-solenoid valve I, 4-filter screen, 5-hydrogen inlet, 6-solenoid valve II, 7-spiral water course, 8-cooling water inlet, 9-shell, 10-heating wire, 11-gas outlet, 12-automatically controlled backpressure valve, 14-self-heating agent powder, 15-heating water outlet, 16-heating water course solenoid valve, 17-cooling water course solenoid valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention become more apparent, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiments described below, together with the words of orientation, are exemplary and intended to explain the invention and should not be taken as limiting the invention.
As shown in fig. 1, a cold start heater of a self-heating fuel cell automobile comprises a self-heating agent tank body, and is characterized in that self-heating agent powder 14 is filled in an inner cavity of the self-heating agent tank body, an air inlet 2 connected with an air compressor of a fuel cell engine is formed in the self-heating agent tank body, and the self-heating agent powder 14 and air entering through the air inlet 2 undergo oxidation-reduction reaction to generate a large amount of heat, so that components to be heated in the cold start process are rapidly heated; the self-heating agent tank body is provided with a hydrogen inlet 5 connected with a hydrogen path of the fuel cell engine, hydrogen entering through the hydrogen inlet 5 reduces the self-heating agent powder 14, and the self-heating agent powder 14 is hermetically stored by taking the hydrogen as a protective gas for the next time when cold start is needed.
Preferably, the air inlet 2 and the hydrogen inlet 5 are respectively provided with a solenoid valve I3 and a solenoid valve II 6.
Preferably, the self-heating agent tank body is provided with a gas outlet 11, the gas outlet 11 is provided with an electric control back pressure valve 12, and the gas outlet 11, the air inlet 2 and the hydrogen inlet 5 are all provided with a filter screen 4 to prevent the self-heating agent powder 14 from escaping.
Preferably, the self-heating agent tank body is coated with a shell 9, a spiral water channel 7 is arranged between the shell 9 and the self-heating agent tank body, two ends of the spiral water channel 7 are respectively provided with a cooling water inlet 8 and a heating water outlet 15, the cooling water inlet 8 is connected with a cooling water channel of the fuel cell engine, the heating water outlet 15 is connected with an automobile water tank, a cooling water channel electromagnetic valve 17 is arranged on the cooling water inlet 8, and a heating water channel electromagnetic valve 16 is arranged on the heating water outlet 15.
Preferably, the electric heating wires 10 are uniformly distributed in the shell of the self-heating agent tank body, the electric heating wires 10 are electrified and heated through the lead wires 1, and the shell 9 is coated with the heat insulation layer.
Preferably, the self-heating agent powder 14 is a metal powder, an alloy powder, or a mixture powder. Wherein the features of the self-heating agent powder 14 include: can react with oxygen to release heat rapidly; can be reduced by hydrogen; the melting point is higher, and caking is not easy to occur at high temperature; the cost is controllable; is safe and reliable.
Preferably, the self-heating agent powder 14 is iron powder.
As shown in fig. 2, the present invention further provides a heating method for a cold start heater of a self-heating fuel cell vehicle, which is characterized by comprising the following steps:
the first step: opening an electric control back pressure valve 12 to spray out most of hydrogen originally stored in the self-heating agent tank body in a sealing way, and then enabling oxygen in the air to enter the self-heating agent tank body to start reaction heat release;
and a second step of: the electromagnetic valve I3 is opened, so that the contact between the self-heating agent and oxygen is further increased, and the heat release is accelerated;
and a third step of: the cooling water way water pump, the cooling water way electromagnetic valve 17 and the heating water way electromagnetic valve 16 are opened, the cooling liquid is gradually heated, and heat is transferred to the whole vehicle power system;
fourth step: starting the air compressor after the temperature of the power supply rises sufficiently, adjusting the opening of the electric control back pressure valve 12, and controlling the flow and the pressure of air in the self-heating agent cavity by matching with the air compressor;
fifth step: starting formally starting the whole vehicle power system after the temperature of the whole vehicle power system is sufficiently raised;
sixth step: waiting for the vehicle to enter a stable running state, and simultaneously confirming that the vehicle runs in an outdoor ventilation environment;
seventh step: closing the electromagnetic valve I3, the heating waterway electromagnetic valve 16 and the cooling waterway electromagnetic valve 17, stopping the flow of the cooling liquid and fresh air from the air compressor through the self-heating agent tank body, electrifying the heating wire 10, and heating the oxidized self-heating agent powder 14 to the reduction reaction temperature;
eighth step: opening an electromagnetic valve II 6, adjusting the opening of an electric control back pressure valve 12, controlling the flow and pressure of hydrogen in the self-heating agent cavity, and completing the reduction of the self-heating agent powder 14 by using the hydrogen;
ninth step: after the reduction reaction is finished, the electric control back pressure valve 12 is closed, the electromagnetic valve II 6 is closed, and high-purity hydrogen with the sealing pressure higher than the atmospheric pressure in the cavity of the self-heating agent tank is ensured.
Finally, it should be pointed out that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting. Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. The self-heating fuel cell automobile cold start heater comprises a self-heating agent tank body, and is characterized in that self-heating agent powder (14) is filled in an inner cavity of the self-heating agent tank body, an air inlet (2) connected with an air compressor of a fuel cell engine is formed in the self-heating agent tank body, and the self-heating agent powder (14) and air entering through the air inlet (2) undergo oxidation-reduction reaction to generate a large amount of heat, so that components to be heated in a cold start process are rapidly heated; the self-heating agent tank body is provided with a hydrogen inlet (5) connected with a hydrogen path of the fuel cell engine, hydrogen entering through the hydrogen inlet (5) reduces self-heating agent powder (14), and the self-heating agent powder (14) is hermetically stored by taking the hydrogen as a protective gas and is reserved for the next time when cold start is needed;
the self-heating agent tank body is provided with a gas outlet (11), an electric control back pressure valve (12) is arranged on the gas outlet (11), and filter screens (4) are arranged on the gas outlet (11), the air inlet (2) and the hydrogen inlet (5) to prevent self-heating agent powder (14) from escaping;
the self-heating agent tank body is coated with a shell (9), a spiral water channel (7) is arranged between the shell (9) and the self-heating agent tank body, a cooling water inlet (8) and a heating water outlet (15) are respectively arranged at two ends of the spiral water channel (7), the cooling water inlet (8) is connected with a cooling water channel of a fuel cell engine, the heating water outlet (15) is connected with an automobile water tank, a cooling water channel electromagnetic valve (17) is arranged on the cooling water inlet (8), and a heating water channel electromagnetic valve (16) is arranged on the heating water outlet (15);
the electric heating wires (10) are uniformly distributed in the shell of the self-heating agent tank body, and the shell (9) is coated with a heat preservation layer;
the self-heating agent powder (14) is iron powder.
2. The self-heating fuel cell automobile cold start heater according to claim 1, wherein the air inlet (2) and the hydrogen inlet (5) are respectively provided with a solenoid valve I (3) and a solenoid valve II (6).
3. A method for heating a cold start heater of a self-heating fuel cell vehicle according to any one of claims 1 to 2, comprising the steps of:
the first step: opening an electric control back pressure valve (12) to spray out most of hydrogen originally stored in the self-heating agent tank body in a sealing way, and then enabling oxygen in the air to enter the self-heating agent tank body to start reaction heat release;
and a second step of: opening the electromagnetic valve I (3), further increasing the contact between the self-heating agent and oxygen, and accelerating heat release;
and a third step of: the cooling water way water pump, the cooling water way electromagnetic valve (17) and the heating water way electromagnetic valve (16) are started, the cooling liquid is gradually heated, and heat is transferred to the whole vehicle power system;
fourth step: starting the air compressor after the temperature of the power supply rises sufficiently, adjusting the opening of the electric control back pressure valve (12) and controlling the flow and the pressure of air in the self-heating agent cavity by matching with the air compressor;
fifth step: starting formally starting the whole vehicle power system after the temperature of the whole vehicle power system is sufficiently raised;
sixth step: waiting for the vehicle to enter a stable running state, and simultaneously confirming that the vehicle runs in an outdoor ventilation environment;
seventh step: closing the electromagnetic valve I (3), the heating waterway electromagnetic valve (16) and the cooling waterway electromagnetic valve (17), stopping the flow of cooling liquid and fresh air from the air compressor from flowing through the self-heating agent tank body, electrifying the heating wire (10), and heating oxidized self-heating agent powder (14) to the reduction reaction temperature;
eighth step: opening an electromagnetic valve II (6), adjusting the opening of an electric control back pressure valve (12), controlling the flow and pressure of hydrogen in the self-heating agent cavity, and reducing the self-heating agent powder (14) by using the hydrogen;
ninth step: after the reduction reaction is finished, the electric control back pressure valve (12) is closed, then the electromagnetic valve II (6) is closed, and high-purity hydrogen with the sealing pressure higher than the atmospheric pressure in the cavity of the self-heating agent tank is ensured.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110978707.XA CN113707904B (en) | 2021-08-25 | 2021-08-25 | Self-heating fuel cell automobile cold start heater and heating method |
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| CN202110978707.XA CN113707904B (en) | 2021-08-25 | 2021-08-25 | Self-heating fuel cell automobile cold start heater and heating method |
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| CN113707904A CN113707904A (en) | 2021-11-26 |
| CN113707904B true CN113707904B (en) | 2024-03-26 |
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2021
- 2021-08-25 CN CN202110978707.XA patent/CN113707904B/en active Active
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| CN113707904A (en) | 2021-11-26 |
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