CN113665375A - Vehicle start control method, controller and storage medium - Google Patents
Vehicle start control method, controller and storage medium Download PDFInfo
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- CN113665375A CN113665375A CN202111117740.XA CN202111117740A CN113665375A CN 113665375 A CN113665375 A CN 113665375A CN 202111117740 A CN202111117740 A CN 202111117740A CN 113665375 A CN113665375 A CN 113665375A
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- 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
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
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- 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
- B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
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- 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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/44—Control modes by parameter estimation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The invention discloses a vehicle start control method, a controller and a storage medium, wherein the method comprises the following steps: after a power battery of the vehicle is controlled to supply power to a heating device of the power battery and the heating device works according to preset heating power, acquiring the cell temperature and/or the charge state of the power battery; and adjusting the heating power of the heating device according to the cell temperature and/or the state of charge. The invention shortens the time of low-temperature starting of the fuel cell automobile.
Description
Technical Field
The present invention relates to the field of automotive technologies, and in particular, to a vehicle start control method, a controller, and a storage medium.
Background
When an existing fuel cell automobile is started in a low-temperature environment, high voltage required by a fuel cell auxiliary part is usually provided when the cell temperature of a power battery reaches a set threshold (such as 5 ℃), so that the fuel cell is started automatically.
Under the control strategy, the power battery is usually used for supplying power to a heating device carried by the power battery, so that the heating device works according to lower constant heating power and heats the battery core of the power battery, and the battery core temperature of the power battery is gradually increased to a set temperature threshold. For example, the heating device heats the electric core of the power battery with a constant heating power of 2kW, the electric core of the power battery is heated at 0.5 ℃/min, and if the temperature is raised from 0 ℃ to a set threshold value of 5 ℃, 10 minutes is needed. Therefore, the existing heating mode is heated by constant heating power, the heating process is time-consuming, and the starting time of the fuel cell automobile in the low-temperature environment is too long.
Disclosure of Invention
The embodiment of the application aims to solve the technical problems of low-temperature environment starting and long starting time of a fuel cell automobile by providing a vehicle starting control method, a controller and a storage medium.
The embodiment of the application provides a vehicle starting control method, which is applied to a controller of a vehicle and comprises the following steps:
the method comprises the steps that after a power battery of a vehicle is controlled to supply power to a heating device of the power battery, the heating device works according to preset heating power, and working condition parameters of the power battery are obtained; the working condition parameters comprise cell temperature and/or state of charge;
and adjusting the heating power of the heating device according to the working condition parameters.
In an embodiment, the step of adjusting the heating power of the heating device according to the operating condition parameter includes:
determining target heating power corresponding to the working condition parameters according to the working condition parameters and the corresponding relation between preset working condition parameters and heating power, wherein the target heating power is larger than the preset heating power;
adjusting the heating power of the heating device to the target heating power.
In an embodiment, the step of adjusting the heating power of the heating device according to the operating condition parameter further includes:
when the working condition parameters meet the starting conditions of the fuel cell, controlling the power cell to supply power to the fuel cell so as to start the fuel cell;
and controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device.
In one embodiment, the fuel cell start-up conditions include:
the chargeable and dischargeable power of the power battery under the working condition parameters is the same as the preset net input and output power of the fuel battery;
and/or;
the current actual dischargeable power of the power battery is larger than or equal to the rated discharge power of the power battery, and the current actual chargeable power of the power battery is larger than or equal to the rated charge power of the power battery.
In one embodiment, the step of controlling the power battery to supply power to the fuel cell to start the fuel cell when the operating condition parameter satisfies a starting condition of the fuel cell includes:
when the working condition parameters meet the starting conditions of the fuel cell, controlling the power cell to stop supplying power to the heating device;
and controlling the power battery to supply power to the fuel battery so as to start the fuel battery.
In one embodiment, the step of controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device includes:
acquiring net output power of the fuel cell;
acquiring an adjusting value of the heating power according to the difference value of the net output power and the heating power of the heating device;
and increasing the heating power according to the adjusting value, wherein the increased heating power is smaller than the net output power.
In one embodiment, after the step of controlling the power battery to supply power to the fuel cell to start the fuel cell when the operating condition parameter satisfies the starting condition of the fuel cell, the method further includes:
acquiring the temperature of a fuel cell stack;
judging whether the temperature of the galvanic pile is greater than or equal to a set temperature;
and when the temperature of the electric pile is greater than or equal to a set temperature, controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device.
In an embodiment, after the step of controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device, the method further includes:
acquiring the chargeable and dischargeable power of the power battery;
and when the chargeable and dischargeable power reaches the rated chargeable and dischargeable power of the power battery, controlling the automobile to start running.
In addition, to achieve the above object, the present invention also provides a controller comprising: the vehicle starting control method comprises a memory, a processor and a vehicle starting control program which is stored on the memory and can run on the processor, wherein the vehicle starting control program realizes the steps of the vehicle starting control method when being executed by the processor.
Further, to achieve the above object, the present invention also provides a storage medium having stored thereon a vehicle start-up control program which, when executed by a processor, realizes the steps of the vehicle start-up control method described above.
The technical scheme of the vehicle starting control method, the controller and the storage medium provided by the embodiment of the application at least has the following technical effects or advantages:
the technical scheme is that after the power battery of the vehicle is controlled to supply power to the heating device of the power battery, the electric core temperature and/or the charge state of the power battery are acquired after the heating device works according to the preset heating power, the heating power of the heating device is adjusted according to the electric core temperature and/or the charge state, and meanwhile, the fuel battery is accurately controlled to quickly finish low-temperature starting and output relatively high power to the heating device, so that the heating power of the heating device is further improved.
Drawings
FIG. 1 is a schematic flow chart diagram of a first embodiment of a vehicle launch control method of the present invention;
FIG. 2 is a schematic flow chart diagram of a second embodiment of a vehicle launch control method of the present invention;
FIG. 3 is a schematic flow chart diagram illustrating a third embodiment of a vehicle launch control method in accordance with the present invention;
FIG. 4 is a schematic flow chart diagram illustrating a fourth embodiment of a vehicle launch control method in accordance with the present invention;
FIG. 5 is a schematic flow chart diagram illustrating a fifth embodiment of a vehicle launch control method in accordance with the present invention;
fig. 6 is a schematic structural diagram of a hardware operating environment according to an embodiment of the present invention.
Detailed Description
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
While a logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different sequence than those shown or described.
As shown in fig. 1, in a first embodiment of the present application, a vehicle start control method of the present application is applied to a controller of the present vehicle, the method including the steps of:
step S210: and after controlling a power battery of the vehicle to supply power to a heating device of the power battery and enabling the heating device to work according to preset heating power, acquiring working condition parameters of the power battery.
Step S220: and adjusting the heating power of the heating device according to the working condition parameters.
The vehicle is a fuel cell vehicle, the fuel cell vehicle comprises a power battery and a fuel cell, the power battery carries a heating device, such as a heater, and the heating device mainly heats the power battery so as to raise the cell temperature of the power battery. The heating device is provided with a plurality of heating gears, each gear corresponds to one heating power, the higher the gear is, the larger the heating power is, and the faster the electric core temperature of the power battery is increased. It can also be understood that the heating power of the heating device can be adjusted, and the greater the adjustment of the heating power, the faster the cell temperature of the power battery rises. The power battery is a power supply, has a charging function, and is generally responsible for supplying power to a heating device, a fuel cell, and accessories (for example, an on-vehicle air conditioner, an on-vehicle audio system, a vehicle lamp, and the like) of a fuel cell vehicle, and the fuel cell is a power generation device, and is generally responsible for supplying power to a driving motor at a wheel end of the fuel cell vehicle and also supplying electric energy to the power battery to charge the power battery. The fuel cell is started automatically at low temperature, the power cell is needed, namely the power cell needs to supply power to the fuel cell, after the power cell supplies power to the fuel cell, the fuel cell starts to be started automatically, and after the fuel cell starts to be started automatically, the temperature of a stack of the fuel cell is gradually increased.
In this embodiment, the cell temperature of the power battery corresponding to the low-temperature start condition of the fuel cell vehicle is obtained in advance through a low-temperature start test of the fuel cell vehicle. The cell temperature of the power battery corresponding to the low-temperature starting condition of the fuel cell vehicle is a critical temperature for judging whether the fuel cell vehicle meets the low-temperature starting condition, which is called as a preset temperature in this embodiment.
Specifically, after a driver turns a car key to start the fuel cell car, the current cell temperature of the power cell is collected, whether the current cell temperature of the power cell is lower than a preset temperature or not is judged, if the current cell temperature of the power cell is lower than the preset temperature, it is determined that the fuel cell car meets a low-temperature starting condition, and then the power cell of the fuel cell car is controlled to supply power to a heating device of the power cell, and the heating device works according to preset heating power. For example, in winter in north, the ambient temperature is relatively low, the fuel cell vehicle does not start for a long time, and the relatively low ambient temperature may reduce the cell temperature of the power battery, that is, in the case of relatively low ambient temperature, the cell temperature of the power battery may also be relatively low. If the battery core temperature of the power battery is lower, the dischargeable power of the power battery is weaker, so that when the power battery of the fuel battery automobile is controlled to start to supply power to the heating device of the power battery, the heating device heats the power battery according to the lower fixed heating power. The lower fixed heating power is the preset heating power, for example, the preset heating power is 2 kW.
After the heating device heats the power battery according to the lower fixed heating power, the working condition parameters of the power battery change, the working condition parameters comprise the temperature and/or the state of charge of the battery, the state of charge is also called SOC, the state of charge is used for reflecting the residual capacity of the battery, the numerical value of the state of charge is defined as the ratio of the residual capacity to the capacity of the battery, and the common percentage represents the ratio. It should be understood that, after the heating device heats the power battery according to a lower fixed heating power, the cell temperature of the power battery gradually increases, the SOC of the power battery gradually increases, and the dischargeable power of the power battery also gradually increases. In the process that the power battery is heated by the heating device, the cell temperature and/or the charge state of the power battery are/is acquired, then the heating power of the heating device is increased according to the cell temperature and/or the charge state, along with the increase of the heating power of the heating device, the cell temperature of the power battery is increased faster, and the cell temperature heating time of the power battery is shortened.
The dischargeable power of the power battery is related to the cell temperature and the SOC of the power battery, namely when the power battery works in a normal temperature range, the higher the cell temperature of the power battery is, the larger the SOC of the power battery is, and the larger the dischargeable power of the power battery is; and the chargeable power of the power battery is also related to the cell temperature and the SOC of the power battery, namely when the power battery works in a normal temperature range, the higher the cell temperature of the power battery is, the smaller the SOC of the power battery is, and the larger the chargeable power of the power battery is. The heating power of the heating device is increased, so that the temperature of the battery core of the power battery can be quickly increased, the power battery can quickly reach a rated charge-discharge state, the heating time required by the power battery to reach the rated charge-discharge state is shortened, and the time for starting the fuel battery automobile at low temperature is further shortened.
According to the technical scheme, the heating time required for the power battery to reach the rated charge-discharge state is shortened by adopting the technical means that after the power battery of the vehicle is controlled to supply power to the heating device of the power battery and the heating device works according to the preset heating power, the cell temperature and/or the charge state of the power battery are/is acquired, and the heating power of the heating device is increased according to the cell temperature and/or the charge state, so that the time for the fuel battery automobile to start at low temperature is shortened, and the driving experience of a driver is improved.
As shown in fig. 2, in the second embodiment of the present application, step S220 includes the steps of:
step S2211: and determining the target heating power corresponding to the working condition parameters according to the working condition parameters and the corresponding relation between the preset working condition parameters and the heating power.
Step S2212: adjusting the heating power of the heating device to the target heating power.
The target heating power is greater than the preset heating power. In this embodiment, a preset corresponding relationship between the operating condition parameter and the heating power is preset, where the preset corresponding relationship between the operating condition parameter and the heating power includes a preset corresponding relationship between the electrical core temperature and the heating power, the higher the electrical core temperature of the power battery is, the larger the heating power of the heating device is, that is, each electrical core temperature of the power battery corresponds to a target heating power, after the corresponding target heating power is obtained according to the current electrical core temperature of the power battery, the current heating power of the heating device is adjusted to the obtained target heating power, and then the heating device is controlled to heat the power battery according to the obtained target heating power, so as to increase the electrical core temperature of the power battery.
In this embodiment, the preset correspondence between the operating condition parameters and the heating power further includes a correspondence between a preset SOC and the heating power, the larger the SOC of the power battery is, the larger the heating power of the heating device is, that is, each SOC of the power battery corresponds to a target heating power, after the corresponding target heating power is obtained according to the current SOC of the power battery, the current heating power of the heating device is adjusted to the obtained target heating power, and then the heating device is controlled to heat the power battery according to the obtained target heating power, so as to increase the temperature of the electric core of the power battery.
In this embodiment, the preset correspondence between the operating condition parameters and the heating power further includes a preset correspondence between the cell temperature and the adjustment amount of the SOC and the heating power, for example, when the cell temperature is-20 ℃, the adjustment amount of the heating power is 2kW, and the SOC is 40%; the SOC is 40%, and when the temperature of the battery core is-15 ℃, the adjustment quantity of the heating power is 3 kW; the SOC is 30%, and when the temperature of the battery core is-20 ℃, the adjustment quantity of the heating power is 1 kW. And obtaining a corresponding heating power regulating quantity according to the current cell temperature and SOC of the power battery, and then obtaining a target heating power according to the regulating quantity of the heating power and the current heating power of the heating device, wherein the target heating power is the sum of the regulating quantity of the heating power and the current heating power of the heating device. After the target heating power is obtained, the current heating power of the heating device is adjusted to the obtained target heating power, and the heating device is controlled to heat the power battery according to the obtained target heating power so as to increase the battery core temperature of the power battery.
As shown in fig. 3, in the third embodiment of the present application, the step S220 further includes the following steps:
step S2220: and acquiring working condition parameters of the power battery.
Step S2221: judging whether the working condition parameters meet the starting conditions of the fuel cell; if yes, executing step S2222; if not, the process returns to the step S2220.
Step S2222: and controlling the power battery to stop supplying power to the heating device.
Step S2223: and controlling the power battery to supply power to the fuel battery so as to start the fuel battery.
Step S2224: and controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device.
In this embodiment, the chargeable and dischargeable power of the power battery at each cell temperature and SOC is obtained through test calculation in advance, and then each cell temperature and SOC of the power battery are associated with the chargeable and dischargeable power of the power battery at each cell temperature and SOC to form an association relationship between the cell temperature and SOC of the power battery and the chargeable and dischargeable power, where the chargeable and dischargeable power includes the chargeable power and the dischargeable power of the power battery. In one aspect, the starting condition includes that the chargeable and dischargeable power of the power battery under the working condition parameters (cell temperature and SOC) is the same as the preset net input and output power of the fuel battery. The chargeable and dischargeable power of the power battery under the working condition parameters comprises chargeable power and dischargeable power, and the preset net input and output power comprises preset net output power and preset net input power required by the low-temperature self-starting process of the fuel battery. The starting condition may be understood as that the current chargeable power of the power cell is the same as the preset net output power required for the low-temperature self-starting process of the fuel cell, and the current dischargeable power of the power cell is the same as the preset net input power required for the low-temperature self-starting process of the fuel cell. Specifically, after the current cell temperature and the current SOC of the power battery are obtained, the current chargeable and dischargeable power of the power battery is obtained according to the cell temperature, the current SOC and the incidence relation of the power battery, whether the current chargeable and dischargeable power of the power battery is the same as the preset net input and output power of the fuel battery is judged, if the current chargeable and dischargeable power of the power battery is the same as the preset net input and output power of the fuel battery, the starting condition of the fuel battery is judged to be met, and the power battery is controlled to supply power to the fuel battery.
On the other hand, the starting condition can also comprise that the current actual dischargeable power of the power battery is larger than or equal to the rated discharge power of the power battery and the current actual chargeable power of the power battery is larger than or equal to the rated charge power of the power battery;
specifically, after the current cell temperature and the current SOC of the power battery are obtained, the current actual dischargeable power and the actual chargeable power of the power battery are obtained according to the cell temperature, the current SOC and the correlation relationship of the power battery, and if the current actual dischargeable power and the actual chargeable power of the power battery are larger than or equal to the rated discharge power and the rated charge power respectively, and it is determined that the starting condition of the fuel battery is met, the power battery is controlled to supply power to the fuel battery.
After the power battery supplies power to the fuel cell, the fuel cell starts to self-start, the temperature of the fuel cell stack gradually rises, and the fuel cell is controlled to supply power to the heating device. When the power battery supplies power to the fuel battery, the power battery also supplies power to the heating device, the fuel battery outputs electric energy after self-starting, the power battery and the fuel battery simultaneously supply power to the heating device, the heating power input to the heating device is increased, and the heating power of the heating device can be continuously increased, so that the temperature of the electric core of the power battery is further increased. When the starting condition of the fuel cell is met, the power cell supplies power to the fuel cell, the fuel cell can be quickly started, the defect that the fuel cell can be started automatically when the temperature of a cell of the power cell is increased to a set threshold (for example, 5 ℃) in the prior art is overcome, the starting time of the fuel cell in a low-temperature environment is further shortened, and the fuel cell cannot be damaged additionally.
Furthermore, considering that the self-starting time of the fuel cell is relatively short, in order to enable the fuel cell to be rapidly self-started, sufficient electric energy needs to be provided for the fuel cell, after the starting condition of the fuel cell is determined to be met, the power cell is controlled to stop supplying power to the heating device, namely, the power cell is controlled to stop heating the power cell first, and then the power cell is controlled to supply power to the fuel cell, at this time, the power cell can provide sufficient electric energy for the fuel cell, and the smooth self-starting of the fuel cell is ensured. After the fuel cell starts to output electric energy outwards, the temperature of the fuel cell stack rises gradually, and then the fuel cell is controlled to supply power to the heating device, and the heating power of the heating device is increased.
Controlling the fuel cell to supply power to the heating device, and increasing the heating power of the heating device includes: and acquiring the net output power of the fuel cell, and increasing the heating power of the heating device according to the change value of the net output power.
Specifically, after the fuel cell supplies power to the heating device, the heating device restarts heating the power cell. After the fuel cell is started, the temperature of a stack of the fuel cell gradually rises, the net output power of the fuel cell gradually increases, that is, the net output power of the fuel cell gradually increases, and the gradual increase of the net output power of the fuel cell means that the fuel cell can provide more electric energy for the heating device, so that the current net output power of the fuel cell after the fuel cell is started can be obtained, an adjustment value of the heating power is obtained according to the difference value between the current net output power and the current heating power of the heating device, and then the adjustment value increases the heating power of the heating device. Since only the fuel cell is currently supplying power to the heating device, the increased heating power is close to but less than the net output power of the fuel cell. Wherein the adjustment value of the heating power is determined based on the current net output power and the current heating power of the heating device, for example, the current net output power is 20kW, the current heating power of the heating device is 12kW, and the difference between the current net output power and the current heating power of the heating device is 8kW, then the adjustment value of the heating power is determined to be as close to 8kW as possible, but not equal to 8 kW.
Furthermore, the fuel cell supplies power to the heating device, the heating device restarts to heat the power cell, and after or at the same time when the fuel cell supplies power to the heating device, the power cell can be controlled to supply power to the heating device, so that the electric power input into the heating device is increased, that is, the heating power of the heating device can be further increased, and the cell temperature of the power cell is further increased. Wherein, the heating device is powered by the fuel cell and the power battery together, and the increased heating power can be larger than the net output power of the fuel cell; and when the fuel cell supplies power to the heating device, the electric energy of the fuel cell is not completely transmitted to the heating device, and part of the electric energy is remained and can be transmitted to the power battery so as to charge the power battery.
As shown in fig. 4, in the fourth embodiment of the present application, after step S2223, the following steps are further included:
step S22231: and acquiring the temperature of the fuel cell stack.
Step S22232: judging whether the temperature of the galvanic pile is greater than or equal to a set temperature, if so, executing a step S2224; if not, the process returns to the step S22231.
Step S2224: and controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device.
Generally, after the fuel cell normally operates, the net output power of the fuel cell is much larger than the discharge power of the power cell in a low-temperature environment, that is, after the fuel cell normally operates, the electric energy provided by the fuel cell is much larger than the electric energy provided by the power cell in the low-temperature environment. Therefore, in this embodiment, after the power battery supplies power to the fuel cell, the fuel cell starts to self-start, and when it is detected that the fuel cell is in a normal operating state, the fuel cell is controlled to supply power to the heating device. When the fuel cell is in a normal working state, the net output power of the fuel cell is far greater than the discharge power of the power cell in a low-temperature environment, and the fuel cell supplies power to the heating device, so that the heating power of the heating device can exceed the maximum discharge power of the power cell in the low-temperature environment, and the temperature of the cell of the power cell is rapidly increased.
Specifically, a judgment condition for the completion of the self-starting of the fuel cell is preset, and the completion of the self-starting of the fuel cell indicates that the fuel cell enters a normal working state, namely that the fuel cell can meet the maximum power output requirement. The completion of the self-start of the fuel cell can be judged by the stack temperature of the fuel cell, and the judgment condition is that the self-start of the fuel cell is completed when the stack temperature of the fuel cell is greater than or equal to a set temperature (for example, 60 ℃), namely the fuel cell enters a normal operating state.
In this embodiment, after the fuel cell is started automatically, the temperature of the stack of the fuel cell gradually increases, and the output power of the fuel cell is greater than or equal to the power input by the power cell to the fuel cell, which indicates that the fuel cell does not need to rely on the power cell for power supply when the fuel cell is started automatically, i.e., the net output power of the fuel cell is greater than or equal to 0kW, and the power cell stops supplying power to the fuel cell. The gross output power of the fuel cell is also the stack power of the fuel cell, and the net output power of the fuel cell is the gross output power (stack power) of the fuel cell — the output power of the power cell when the power cell supplies power to the fuel cell (which can be understood as the power provided by the power cell to the fuel cell). For example, the gross output of a fuel cell is 5kW, the output of a power cell when the power cell is supplying power to the fuel cell is 2kW, and the net power of the fuel cell is 3 kW.
And after the power battery stops supplying power to the fuel battery, acquiring the current temperature of the fuel battery stack, and if the current temperature of the fuel battery stack is greater than or equal to a set temperature, determining that the self-starting of the fuel battery is finished, namely the fuel battery enters a normal working state. And then, the fuel cell is controlled to supply power to the heating device, so that the temperature of the cell of the power battery is rapidly increased, and the heating time required by the power battery to reach a rated charge-discharge state is favorably shortened.
It should be noted that the self-starting process of the fuel cell gradually transits from the initial stage of the self-starting to the middle stage of the self-starting and the later stage of the self-starting, in the initial stage of the self-starting, the fuel cell cannot output the electric energy temporarily, when the middle stage of the self-starting is entered, the fuel cell can output the electric energy, and the output electric energy is transmitted to the battery to charge the power battery. In the later stage of the self-starting, namely when the fuel cell completes the self-starting and supplies power to the heating device, the electric energy of the fuel cell cannot be completely transmitted to the heating device, and part of the electric energy remains and is transmitted to the power battery to charge the power battery.
As shown in fig. 5, in the fifth embodiment of the present application, step S2224 further includes the following steps:
step S2225: and acquiring the chargeable and dischargeable power of the power battery.
Step S2226: and when the chargeable and dischargeable power reaches the rated chargeable and dischargeable power of the power battery, controlling the automobile to start running.
When the fuel cell enters a normal working state and the power battery reaches a rated charge-discharge state, the fuel cell automobile can be controlled to start to run. In this embodiment, after the fuel cell supplies power to the heating device and the heating power of the heating device is increased, the cell temperature of the power battery further increases, but as the cell temperature of the power battery further increases, it cannot be determined whether the power battery reaches the rated charge-discharge state. And judging whether the power battery reaches a rated charge-discharge state or not, wherein the judgment needs to be carried out according to the rated charge-discharge power of the power battery in the rated charge-discharge state and the current chargeable-discharge power of the power battery, and if the current chargeable-discharge power of the power battery is greater than or equal to the rated charge-discharge power, the power battery is judged to reach the rated charge-discharge state, so that the fuel cell automobile is controlled to start to run. The fact that the current chargeable and dischargeable power of the power battery is greater than or equal to the rated chargeable and dischargeable power can be understood as that the current discharging power of the power battery is greater than or equal to the rated discharging power and the current chargeable power of the power battery is greater than or equal to the rated chargeable power. The current chargeable and dischargeable power of the power battery can be determined according to the current cell temperature and the current SOC of the power battery, namely, the correlation between the cell temperature and the SOC of the power battery and the chargeable and dischargeable power can be searched through the current cell temperature and the current SOC of the power battery, and the current chargeable and dischargeable power of the power battery can be obtained.
Furthermore, when the fuel cell enters a normal working state and the power cell reaches a rated charging and discharging state, the fuel cell and the power cell do not supply power to the heating device, namely the heating device does not heat the power cell any more. Meanwhile, a part of the total electric energy output by the fuel cell can be used for driving a driving motor at the wheel end of the fuel cell automobile, and the other part of the electric energy can be transmitted to the power battery to charge the power battery.
It should be noted that in winter in north, although the ambient temperature is relatively low, when the fuel cell vehicle is stopped after a period of time, if the key is turned on for the second time after a short time to start the vehicle, the ambient temperature is low, but the power battery still has residual temperature, that is, the battery cell temperature of the power battery is still high, in this case, the vehicle start control method may not be executed to control the fuel cell vehicle to start at a low temperature.
Further, as shown in fig. 6, fig. 6 is a schematic structural diagram of a hardware operating environment according to an embodiment of the present invention.
It should be noted that fig. 6 is a schematic structural diagram of a hardware operating environment of the controller.
As shown in fig. 6, the controller may include: a processor 1001, such as a CPU, a memory 1005, a user interface 1003, a network interface 1004, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the controller configuration shown in fig. 6 is not meant to be limiting for the controller and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 6, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a vehicle start-up control program. Among these, the operating system is a program that manages and controls the controller hardware and software resources, the vehicle launch control program, and the execution of other software or programs.
In the controller shown in fig. 6, the user interface 1003 is mainly used for connecting a terminal, and performing data communication with the terminal; the network interface 1004 is mainly used for the background server and performs data communication with the background server; the processor 1001 may be used to invoke a vehicle launch control program stored in the memory 1005.
In this embodiment, the controller includes: a memory 1005, a processor 1001, and a vehicle start control program stored on the memory 1005 and executable on the processor, wherein:
when the processor 1001 calls the vehicle start control program stored in the memory 1005, the following operations are performed:
the method comprises the steps that after a power battery of a vehicle is controlled to supply power to a heating device of the power battery, the heating device works according to preset heating power, and working condition parameters of the power battery are obtained; the working condition parameters comprise cell temperature and/or state of charge;
and adjusting the heating power of the heating device according to the working condition parameters.
When the processor 1001 calls the vehicle start control program stored in the memory 1005, the following operations are also performed:
determining target heating power corresponding to the working condition parameters according to the working condition parameters and the corresponding relation between preset working condition parameters and heating power, wherein the target heating power is larger than the preset heating power;
adjusting the heating power of the heating device to the target heating power.
When the processor 1001 calls the vehicle start control program stored in the memory 1005, the following operations are also performed:
when the working condition parameters meet the starting conditions of the fuel cell, controlling the power cell to supply power to the fuel cell so as to start the fuel cell;
and controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device.
When the processor 1001 calls the vehicle start control program stored in the memory 1005, the following operations are also performed:
when the working condition parameters meet the starting conditions of the fuel cell, controlling the power cell to stop supplying power to the heating device;
and controlling the power battery to supply power to the fuel battery so as to start the fuel battery.
When the processor 1001 calls the vehicle start control program stored in the memory 1005, the following operations are also performed:
acquiring net output power of the fuel cell;
acquiring an adjusting value of the heating power according to the difference value of the net output power and the heating power of the heating device;
and increasing the heating power according to the adjusting value, wherein the increased heating power is smaller than the net output power.
When the processor 1001 calls the vehicle start control program stored in the memory 1005, the following operations are also performed:
acquiring the temperature of a fuel cell stack;
judging whether the temperature of the galvanic pile is greater than or equal to a set temperature;
and when the temperature of the electric pile is greater than or equal to a set temperature, controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device.
When the processor 1001 calls the vehicle start control program stored in the memory 1005, the following operations are also performed:
acquiring the chargeable and dischargeable power of the power battery;
and when the chargeable and dischargeable power reaches the rated chargeable and dischargeable power of the power battery, controlling the automobile to start running.
The power battery which controls the vehicle supplies power to the heating device of the power battery, the heating device works according to the preset heating power, the cell temperature and/or the charge state of the power battery are acquired, the heating power of the heating device is adjusted according to the cell temperature and/or the charge state, meanwhile, the fuel battery is accurately controlled to rapidly finish low-temperature starting and output relatively high power to the heating device, the technical scheme of the heating power of the heating device is further improved, the technical problem that the fuel battery automobile is started in a low-temperature environment is solved, the starting time is long, the heating time required by the power battery to reach a rated charge-discharge state is shortened, the time for starting the fuel battery automobile at the low temperature is shortened, and the driving experience of a driver is improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A vehicle start control method, characterized in that the method is applied to a controller of a host vehicle, the method comprising:
the method comprises the steps that after a power battery of a vehicle is controlled to supply power to a heating device of the power battery, the heating device works according to preset heating power, and working condition parameters of the power battery are obtained; the working condition parameters comprise cell temperature and/or state of charge;
and adjusting the heating power of the heating device according to the working condition parameters.
2. The method of claim 1, wherein the step of adjusting the heating power of the heating device based on the operating condition parameter comprises:
determining target heating power corresponding to the working condition parameters according to the working condition parameters and the corresponding relation between preset working condition parameters and heating power, wherein the target heating power is larger than the preset heating power;
adjusting the heating power of the heating device to the target heating power.
3. The method of claim 1, wherein the step of adjusting the heating power of the heating device based on the operating condition parameter further comprises:
when the working condition parameters meet the starting conditions of the fuel cell, controlling the power cell to supply power to the fuel cell so as to start the fuel cell;
and controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device.
4. The method of claim 3, wherein the fuel cell start-up conditions include:
the chargeable and dischargeable power of the power battery under the working condition parameters is the same as the preset net input and output power of the fuel battery;
and/or;
the current actual dischargeable power of the power battery is larger than or equal to the rated discharge power of the power battery, and the current actual chargeable power of the power battery is larger than or equal to the rated charge power of the power battery.
5. The method of claim 3, wherein the step of controlling the power cell to supply power to the fuel cell to start the fuel cell when the operating condition parameter satisfies a starting condition of the fuel cell comprises:
when the working condition parameters meet the starting conditions of the fuel cell, controlling the power cell to stop supplying power to the heating device;
and controlling the power battery to supply power to the fuel battery so as to start the fuel battery.
6. The method of claim 3, wherein the step of controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device comprises:
acquiring net output power of the fuel cell;
acquiring an adjusting value of the heating power according to the difference value of the net output power and the heating power of the heating device;
and increasing the heating power according to the adjusting value, wherein the increased heating power is smaller than the net output power.
7. The method of claim 3, wherein after the step of controlling the power cell to supply power to the fuel cell to start the fuel cell when the operating condition parameter satisfies a start condition of the fuel cell, the method further comprises:
acquiring the temperature of a fuel cell stack;
judging whether the temperature of the galvanic pile is greater than or equal to a set temperature;
and when the temperature of the electric pile is greater than or equal to a set temperature, controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device.
8. The method of claim 3, wherein the step of controlling the fuel cell to supply power to the heating device and increasing the heating power of the heating device is followed by the step of:
acquiring the chargeable and dischargeable power of the power battery;
and when the chargeable and dischargeable power reaches the rated chargeable and dischargeable power of the power battery, controlling the automobile to start running.
9. A controller, comprising: a memory, a processor, and a vehicle launch control program stored on the memory and executable on the processor, the vehicle launch control program when executed by the processor implementing the steps of the vehicle launch control method according to any of claims 1-8.
10. A storage medium characterized by having a vehicle start-up control program stored thereon, which when executed by a processor implements the steps of the vehicle start-up control method of any one of claims 1 to 8.
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