CN115071456B - Control method of SOFC (solid oxide Fuel cell) range-extending system, SOFC range-extending system and vehicle - Google Patents
Control method of SOFC (solid oxide Fuel cell) range-extending system, SOFC range-extending system and vehicle Download PDFInfo
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- CN115071456B CN115071456B CN202210664574.3A CN202210664574A CN115071456B CN 115071456 B CN115071456 B CN 115071456B CN 202210664574 A CN202210664574 A CN 202210664574A CN 115071456 B CN115071456 B CN 115071456B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000000446 fuel Substances 0.000 title claims description 17
- 239000007787 solid Substances 0.000 title description 4
- 239000002918 waste heat Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000004606 Fillers/Extenders Substances 0.000 abstract description 9
- 230000001052 transient effect Effects 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/75—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using propulsion power supplied by both fuel cells and batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to the technical field of range extenders, in particular to a control method of an SOFC range extender system, the SOFC range extender system and a vehicle. The control method of the SOFC extended-range system comprises the following steps: and starting the SOFC and judging whether the SOFC reaches the working temperature. If the SOFC does not reach the working temperature, the auxiliary power device supplies power to the driving motor of the vehicle. And if the SOFC reaches the working temperature, the SOFC supplies power to the driving motor at the set output power. And judging whether the current required power of the vehicle is larger than the output power of the SOFC. If so, the SOFC and the auxiliary power device supply power to the driving motor together. If not, the SOFC supplies power to the auxiliary power device and the driving motor respectively. The SOFC range-extending system and the vehicle enable the SOFC to keep stable power output through the control method of the SOFC range-extending system, and solve the problem of slow dynamic response of the power output of the SOFC.
Description
Technical Field
The invention relates to the technical field of range extenders, in particular to a control method of an SOFC range extender system, the SOFC range extender system and a vehicle.
Background
A range extender (range extender) of an automobile refers to a functional module capable of providing additional electric energy for a vehicle-mounted power battery and increasing the driving range of the electric automobile, and conventionally refers to a combination of an engine and a generator.
But the engine needs to burn gasoline to drive the generator to generate electric energy, so that the energy conservation and the environmental protection are poor. For this reason, SOFC extended-range systems are currently commonly used, that is, solid Oxide Fuel Cells (SOFCs) are used to replace an engine and a generator to supply electric energy to a driving motor of an electric vehicle, so that the electric vehicle operates stably. SOFC is used as a clean energy conversion device, which utilizes electrochemical reaction to efficiently convert chemical energy stored in hydrocarbon fuel into electric energy, and meanwhile, the reaction product is mainly water, so that the SOFC is pollution-free, and is more energy-saving and environment-friendly. The problems of the existing SOFC extended-range system are as follows: the operating temperature requirements of the SOFC are high, resulting in a long start-up time of the SOFC. Meanwhile, when the SOFC works, the dynamic response of power output is slower, and the requirement of the electric automobile on rapidly changing the output power under complex and changeable working conditions is difficult to meet.
Therefore, a control method of the SOFC extended-range system, the SOFC extended-range system and the vehicle are needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a control method of an SOFC (solid oxide Fuel cell) range-extending system, the SOFC range-extending system and a vehicle, so that the SOFC can maintain stable power output, the SOFC is prevented from being damaged, and the problem of low dynamic response of the power output is solved.
The technical scheme adopted by the invention is as follows:
A control method of an SOFC extended-range system comprises the following steps:
Starting the SOFC and judging whether the SOFC reaches the working temperature or not;
If the SOFC does not reach the working temperature, the auxiliary power device supplies power to a driving motor of the vehicle so as to enable the vehicle to normally run; heating the SOFC until reaching the working temperature;
if the SOFC reaches the working temperature, the SOFC supplies power to the driving motor with set output power;
Judging whether the current required power of the vehicle is larger than the output power of the SOFC or not;
If yes, the SOFC and the auxiliary power device supply power to the driving motor together;
If not, the SOFC supplies power to the auxiliary power device and the driving motor respectively, and the charging power of the auxiliary power device is the output power of the SOFC minus the current required power of the vehicle.
As a preferred scheme, the control method of the SOFC range-extending system further includes:
Calculating the output power range of the SOFC;
Dividing the output power range of the SOFC into continuous power intervals, wherein each power interval corresponds to one working gear;
In each working gear, the output power of the SOFC is constant.
Preferably, an average value of each power interval is calculated, and the average value is used as the output power of the corresponding working gear.
Preferably, after the SOFC reaches the working temperature, calculating the average required power of the vehicle in a preset time, and defining the working gear corresponding to one power interval of the SOFC as the pre-working gear.
Preferably, the SOC of the auxiliary power unit is monitored in real time;
When the SOC of the auxiliary power device is smaller than a minimum threshold value, the pre-working gear is increased, and the increased working gear is used as an actual working gear of the SOFC;
when the SOC of the auxiliary power device is larger than the highest threshold value, the pre-working gear is reduced, and the reduced working gear is used as the actual working gear of the SOFC;
and when the SOC of the auxiliary power device is larger than the lowest threshold value and smaller than the highest threshold value, keeping the pre-working gear unchanged, and taking the pre-working gear as the actual working gear of the SOFC.
Preferably, when the SOC of the auxiliary power unit is less than a minimum threshold value, the pre-operation gear is increased by one of the operation gears as an actual operation gear of the SOFC;
When the SOC of the auxiliary power unit is greater than a highest threshold value, the pre-operation gear is lowered by one of the operation gears as an actual operation gear of the SOFC.
Preferably, when the vehicle stops running, the SOFC continues to operate using the waste heat and charges the auxiliary power unit.
Preferably, when the waste heat temperature of the SOFC is lower than the working temperature and/or the SOC of the auxiliary power unit is greater than the maximum threshold, the SOFC stops working.
The SOFC range-extending system comprises an SOFC, a fuel storage device, an auxiliary power device and a driving motor, wherein the driving motor is used for driving a vehicle to run, and the SOFC and the auxiliary power device supply power to the driving motor through a control method of the SOFC range-extending system; the fuel storage device communicates with the SOFC to provide fuel to the SOFC.
A vehicle comprising the SOFC extended-range system described above.
The beneficial effects of the invention are as follows:
According to the control method of the SOFC extended-range system, when the SOFC does not reach the working temperature, the auxiliary power device supplies power to the driving motor of the vehicle so as to enable the vehicle to normally run. When the SOFC reaches the working temperature, the SOFC supplies power to the driving motor with set output power, so that the SOFC keeps stable power output, and the SOFC is prevented from being damaged due to the influence of working condition transient. Meanwhile, the charge and discharge states of the auxiliary power device are adjusted in real time according to the current required power of the vehicle and the output power of the SOFC, so that the SOFC is assisted to provide stable output power for the vehicle, the SOFC can increase or decrease the output power at a stable linear rate, and the problem of slow dynamic response of the power output of the SOFC is solved.
According to the SOFC range-extending system provided by the invention, by adopting the control method of the SOFC range-extending system, when the SOFC does not reach the working temperature, the auxiliary power device supplies power to the driving motor of the vehicle, so that the vehicle can normally work when the SOFC does not reach the working temperature, and the auxiliary power device supplies power to the driving motor of the vehicle, so that the vehicle can normally run. When the SOFC reaches the working temperature, the SOFC supplies power to the driving motor with set output power, so that the SOFC keeps stable power output, and the SOFC is prevented from being damaged due to the influence of working condition transient. Meanwhile, the charge and discharge states of the auxiliary power device are adjusted in real time according to the current required power of the vehicle and the output power of the SOFC, so that the SOFC is assisted to provide stable output power for the vehicle, the SOFC can increase or decrease the output power at a stable linear rate, and the problem of slow dynamic response of the power output of the SOFC is solved.
According to the SOFC range-extending system, when the SOFC does not reach the working temperature, the auxiliary power device supplies power to the driving motor of the vehicle, so that the vehicle can normally run. When the SOFC reaches the working temperature, the SOFC supplies power to the driving motor with set output power, so that the SOFC keeps stable power output, and the SOFC is prevented from being damaged due to the influence of working condition transient. Meanwhile, the charge and discharge states of the auxiliary power device are adjusted in real time according to the current required power of the vehicle and the output power of the SOFC, so that the SOFC is assisted to provide stable output power for the vehicle, the SOFC can increase or decrease the output power at a stable linear rate, and the problem of slow dynamic response of the power output of the SOFC is solved.
Drawings
Fig. 1 is a main flowchart of a control method of an SOFC extended-range system according to an embodiment of the present invention;
Fig. 2 is a flowchart of SOFC dividing operation gear provided in an embodiment of the present invention;
fig. 3 is a detailed flowchart of a control method of the SOFC extended-range system according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present invention are shown.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
The embodiment discloses a SOFC extended range system which is mainly used for vehicles such as electric vehicles and the like. Of course, the SOFC extended-range system may also be used in other types of devices, and is not specifically limited herein. Specifically, the SOFC extended-range system comprises an SOFC, a fuel storage device, an auxiliary power device and a driving motor, wherein the driving motor is used for driving a vehicle to run. A fuel storage device communicates with the SOFC to provide fuel to the SOFC. The fuel stored in the fuel storage device includes, but is not limited to, hydrocarbon fuels such as hydrogen, methane, and methanol. The auxiliary power device of the embodiment is a power battery. Of course, the auxiliary power device can also be a combined device of a power battery, a super capacitor and an engine range extender.
The problems of the existing SOFC extended-range system are as follows: the operating temperature requirements of the SOFC are high, resulting in a long start-up time of the SOFC. Meanwhile, stable power output is required to be kept when the SOFC works, the dynamic response of the power output is slower, and the requirement of the electric automobile on rapidly changing the output power under complex and changeable working conditions is difficult to meet.
In order to solve the above problems, as shown in fig. 1, the present embodiment further discloses a control method of the SOFC range-extending system, where the SOFC and the auxiliary power device supply power to the driving motor through the control method of the SOFC range-extending system, so as to ensure stable operation of the vehicle.
Specifically, the control method of the SOFC extended-range system comprises the following steps:
and starting the SOFC and judging whether the SOFC reaches the working temperature.
If the SOFC does not reach the working temperature, the auxiliary power device supplies power to a driving motor of the vehicle so as to enable the vehicle to normally run; the SOFC is warmed up until the operating temperature is reached.
And if the SOFC reaches the working temperature, the SOFC supplies power to the driving motor at the set output power.
And judging whether the current required power of the vehicle is larger than the output power of the SOFC.
If so, the SOFC and the auxiliary power device supply power to the driving motor together.
If not, the SOFC supplies power to the auxiliary power device and the driving motor respectively, and the charging power of the auxiliary power device is the output power of the SOFC minus the current required power of the vehicle.
After the vehicle is started, a control unit of the vehicle (or a control unit of the SOFC extended-range system) acquires temperature information of the SOFC so as to judge whether the temperature of the SOFC reaches the working temperature. If the SOFC does not reach the working temperature, the auxiliary power device supplies power to the driving motor of the vehicle so as to enable the vehicle to normally run. At this point the SOFC starts and heats up itself. When the SOFC reaches the working temperature, the SOFC supplies power to the driving motor with set output power, so that the SOFC keeps stable power output, and the SOFC is prevented from being damaged due to the influence of working condition transient. Meanwhile, the charge and discharge states of the auxiliary power device are adjusted in real time according to the current required power of the vehicle and the output power of the SOFC, so that the SOFC is assisted to provide stable output power for the vehicle, the SOFC can increase or decrease the output power at a stable linear rate, and the problem of slow dynamic response of the power output of the SOFC is solved.
The control method of the SOFC extended-range system also needs to determine the output power range and the working gear of the SOFC. Specifically, as shown in fig. 2, the control method of the SOFC extended-range system further includes:
And calculating the output power range of the SOFC.
And dividing the output power range of the SOFC into continuous power intervals, wherein each power interval corresponds to one working gear.
In each operating range, the output power of the SOFC is constant.
The average value of each power interval is calculated and used as the output power of the corresponding working gear. When the SOFC works in each working gear, the output power of the SOFC is the average value of the power intervals corresponding to the working gears.
When the SOFC begins to work, the working gear of the SOFC needs to be determined, so that the SOFC supplies power to the driving motor with constant output power to drive the vehicle to stably run.
As shown in fig. 3, first, the pre-operating gear of the SOFC needs to be calculated according to the previous operating condition of the vehicle. Specifically, after the SOFC reaches the working temperature, calculating the average required power of the vehicle in the preset time, and defining the working gear corresponding to the power interval of the SOFC as the pre-working gear.
Secondly, the actual working gear of the SOFC is determined according to the SOC of the auxiliary power device, namely the SOC of the power battery (the state of charge of the power battery is used for reflecting the residual capacity of the battery), so that the shift operation of the SOFC is realized, and different working condition requirements of the vehicle are matched.
As shown in fig. 3, before the vehicle stops running, the SOC of the auxiliary power unit is monitored in real time, and when the SOC of the auxiliary power unit is smaller than the minimum threshold value, the pre-operation gear is raised, and the raised operation gear is used as the actual operation gear of the SOFC; when the SOC of the auxiliary power device is larger than the highest threshold value, reducing the pre-working gear, and taking the reduced working gear as the actual working gear of the SOFC; and when the SOC of the auxiliary power unit is larger than the lowest threshold value and smaller than the highest threshold value, keeping the pre-working gear unchanged, and taking the pre-working gear as the actual working gear of the SOFC.
When the change of the external condition is small, for example, the road condition or the running condition of the vehicle is approximately the same as before, the working gear of the SOFC is kept unchanged, and the driving motor is supplied with power at constant output power. When the external conditions slightly change, the power cell can be matched with the SOFC so as to realize the stable operation of the vehicle. For example, when the current required power of the vehicle increases, that is, the power is greater than the output power of the SOFC at the current working gear, the power cell and the SOFC supply power to the driving motor together; when the current required power of the vehicle is reduced, namely the output power of the SOFC is smaller than the output power of the current working gear, the SOFC provides redundant output power for the power battery to charge.
When the external conditions change greatly, for example, the road condition or the running condition of the vehicle differs greatly from the previous conditions, so that the difference between the required power of the vehicle and the output power of the current working gear of the SOFC is larger than the difference between the output powers of two adjacent working gears of the SOFC, the SOFC needs to be shifted (upshift or downshift).
It should be noted that when the SOFC needs to shift gears, it is generally required to increase or decrease one working gear, and of course, when the SOFC encounters an extreme working condition, it may also be required to increase or decrease a plurality of working gears. The power battery SOC has a lowest threshold value and a highest threshold value, and when the power battery SOC is less than the lowest threshold value, it is indicated that the power battery is low in electric quantity and needs to be charged. When the power battery SOC is greater than the lowest threshold, the power battery is fully charged. When the SOC of the auxiliary power unit is smaller than the minimum threshold value, the pre-operation gear is increased by one operation gear to serve as an actual operation gear of the SOFC. At this time, the output power of the SOFC becomes large, and the power battery can be charged while supplying power to the drive motor. When the SOC of the auxiliary power unit is greater than the highest threshold value, the pre-operation gear is reduced by one operation gear to be used as the actual operation gear of the SOFC.
It should be noted that, in the SOFC starting process or the shifting process, on the premise of protecting the SOFC, the output power of the SOFC is not required to change too fast, the working gear of the SOFC can be switched in an auxiliary mode through an auxiliary power system, the output power is increased or reduced at a slow and stable linear rate, the SOFC has enough time to slowly and smoothly reach a new working gear, and damage caused by working condition transient of the SOFC is avoided.
Before the vehicle stops running and after the SOFC reaches the working temperature, the working gear of the SOFC is always in the dynamic adjustment process, namely, the working gear of the SOFC needs to be adjusted according to the working condition (actual power requirement) of the vehicle.
As shown in fig. 1 and 3, when the vehicle stops running, the SOFC continues to operate using the waste heat and charges the auxiliary power unit. Waste heat is recovered through the SOFC extended-range system, so that the power battery is supplemented with electricity, and the auxiliary power device has enough electricity to maintain normal starting and running of the vehicle before the vehicle is started next time and the SOFC does not reach the working temperature.
Specifically, when the waste heat temperature of the SOFC is lower than the operating temperature and/or the SOC of the auxiliary power unit is greater than the maximum threshold, the SOFC stops operating.
The embodiment also discloses a vehicle, which comprises the SOFC range-extending system. When the SOFC does not reach the working temperature, the auxiliary power device supplies power to the driving motor of the vehicle so as to enable the vehicle to normally run. When the SOFC reaches the working temperature, the SOFC supplies power to the driving motor with set output power, so that the SOFC keeps stable power output, and the SOFC is prevented from being damaged due to the influence of working condition transient. Meanwhile, the charge and discharge states of the auxiliary power device are adjusted in real time according to the current required power of the vehicle and the output power of the SOFC, so that the SOFC is assisted to provide stable output power for the vehicle, the SOFC can increase or decrease the output power at a stable linear rate, and the problem of slow dynamic response of the power output of the SOFC is solved.
The above embodiments merely illustrate the basic principle and features of the present invention, and the present invention is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The control method of the SOFC extended-range system is characterized by comprising the following steps of:
Starting the SOFC and judging whether the SOFC reaches the working temperature or not;
If the SOFC does not reach the working temperature, the auxiliary power device supplies power to a driving motor of the vehicle so as to enable the vehicle to normally run; heating the SOFC until reaching the working temperature;
if the SOFC reaches the working temperature, the SOFC supplies power to the driving motor with set output power;
Judging whether the current required power of the vehicle is larger than the output power of the SOFC or not;
If yes, the SOFC and the auxiliary power device supply power to the driving motor together;
If not, the SOFC supplies power to the auxiliary power device and the driving motor respectively, and the charging power of the auxiliary power device is the output power of the SOFC minus the current required power of the vehicle.
2. The method for controlling an SOFC extended-range system of claim 1, further comprising:
Calculating the output power range of the SOFC;
Dividing the output power range of the SOFC into continuous power intervals, wherein each power interval corresponds to one working gear;
In each working gear, the output power of the SOFC is constant.
3. The control method of the SOFC extended-range system according to claim 2, characterized by calculating an average value of each power interval and taking the average value as the output power corresponding to the operating range.
4. The method according to claim 2, wherein after the SOFC reaches the operating temperature, calculating an average required power of the vehicle in a preset time, and defining the operating gear corresponding to the power interval of the SOFC as a pre-operating gear.
5. The control method of the SOFC extended-range system of claim 4, wherein the SOC of the auxiliary power unit is monitored in real time before the vehicle stops operating;
When the SOC of the auxiliary power device is smaller than a minimum threshold value, the pre-working gear is increased, and the increased working gear is used as an actual working gear of the SOFC;
when the SOC of the auxiliary power device is larger than the highest threshold value, the pre-working gear is reduced, and the reduced working gear is used as the actual working gear of the SOFC;
and when the SOC of the auxiliary power device is larger than the lowest threshold value and smaller than the highest threshold value, keeping the pre-working gear unchanged, and taking the pre-working gear as the actual working gear of the SOFC.
6. The control method of the SOFC extended-range system according to claim 5, characterized in that the pre-operation gear is raised by one of the operation gears as an actual operation gear of the SOFC when the SOC of the auxiliary power unit is smaller than a minimum threshold value;
When the SOC of the auxiliary power unit is greater than a highest threshold value, the pre-operation gear is lowered by one of the operation gears as an actual operation gear of the SOFC.
7. The method of controlling a range-extending SOFC system of claim 1, wherein when the vehicle is stopped, the SOFC continues to operate using waste heat and charges the auxiliary power unit.
8. The method according to claim 7, wherein the SOFC stops working when the residual heat temperature of the SOFC is lower than the operating temperature and/or the SOC of the auxiliary power unit is greater than a maximum threshold.
9. An SOFC range-extending system, which is characterized by comprising an SOFC, a fuel storage device, an auxiliary power device and a driving motor, wherein the driving motor is used for driving a vehicle to run, and the SOFC and the auxiliary power device supply power to the driving motor through the control method of the SOFC range-extending system according to any one of claims 1 to 8; the fuel storage device communicates with the SOFC to provide fuel to the SOFC.
10. A vehicle comprising the SOFC range-extending system of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210664574.3A CN115071456B (en) | 2022-06-13 | 2022-06-13 | Control method of SOFC (solid oxide Fuel cell) range-extending system, SOFC range-extending system and vehicle |
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|---|---|---|---|
| CN202210664574.3A CN115071456B (en) | 2022-06-13 | 2022-06-13 | Control method of SOFC (solid oxide Fuel cell) range-extending system, SOFC range-extending system and vehicle |
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| CN115071456A CN115071456A (en) | 2022-09-20 |
| CN115071456B true CN115071456B (en) | 2024-05-14 |
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