CN116811673A - Low-temperature starting method and device of fuel cell, electronic equipment and vehicle - Google Patents
Low-temperature starting method and device of fuel cell, electronic equipment and vehicle Download PDFInfo
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Abstract
The application provides a low-temperature starting method, a device, electronic equipment and a vehicle of a fuel cell, which solve the problem of overcharging of a power cell under the low-temperature condition by using a heating component to consume the net output power of the fuel cell, and also realize the heating of the fuel cell and the power cell, improve the charging power of the power cell, realize the charging of the power cell, and enable the fuel cell to start smoothly when the fuel cell reaches the cold starting condition and the charging power of the power cell is smaller than the net output power of the fuel cell, thereby ensuring that the vehicle can be electrified smoothly. And when the temperature difference is larger than a preset temperature difference threshold value, the net output power is redistributed, so that the balance of the internal temperature of the power battery is improved, and the influence of the consistency of the single battery on the service life of the power battery is reduced.
Description
Technical Field
The present application relates to the field of vehicle technologies, and in particular, to a low-temperature starting method and apparatus for a fuel cell, an electronic device, and a vehicle.
Background
The hydrogen fuel cell is used as a clean, efficient and pollution-free electrochemical power generation device, and the hydrogen fuel cell automobile is the mainstream of the current automobile industry development, so the safety and the economy of the fuel cell automobile are the subjects of attention of various automobile enterprises, however, when the temperature of the power battery of the automobile is lower than-20 ℃, the required power of the whole automobile is smaller (generally smaller than 10 KW), the back flushing capability of the power battery is weaker, even no recharging capability is achieved, at the moment, the starting fuel cell can have certain power overflow, the overcharge of the power battery is caused, and the starting of the fuel cell is forbidden at the moment for safety consideration, so that the automobile can only be powered down when the electric quantity of the power battery is lower, and the trouble is brought to users.
Disclosure of Invention
In view of the above, the present application is directed to a method, an apparatus, an electronic device and a vehicle for starting a fuel cell at low temperature, which are used for solving the problem that the fuel cell is difficult to start at low temperature.
In view of the above object, a first aspect of the present application provides a low-temperature start-up method of a fuel cell, comprising:
determining the net output power of the fuel cell and the maximum allowable charging power of the power cell in the low-temperature starting mode;
determining a requested charge power of the power battery and a requested consumed power of a heating assembly based on the net output power and the maximum allowable charge power;
controlling the power battery to charge according to the request charging power, and determining the temperature difference of the power battery in real time;
controlling the heating assembly to heat the fuel cell and/or the power cell according to the request consumed power, and monitoring the temperature of the cooling liquid of the fuel cell in real time;
and redistributing the net output power until the temperature of the cooling liquid of the fuel cell reaches a preset temperature threshold value in response to the temperature difference being larger than the preset temperature difference threshold value, and completing the low-temperature starting of the fuel cell.
A second aspect of the present application provides a low-temperature start-up device for a fuel cell, comprising:
a power determination module configured to: determining the net output power of the fuel cell and the maximum allowable charging power of the power cell in the low-temperature starting mode;
a power distribution module configured to: determining a requested charge power of the power battery and a requested consumed power of a heating assembly based on the net output power and the maximum allowable charge power;
a temperature difference determination module configured to: controlling the power battery to charge according to the request charging power, and determining the temperature difference of the power battery in real time;
a heating module configured to: controlling the heating assembly to heat the cooling liquid according to the request consumed power, and monitoring the temperature of the cooling liquid in real time;
a power determination module configured to: and redistributing the net output power until the temperature of the cooling liquid of the fuel cell reaches a preset temperature threshold value in response to the temperature difference being larger than the preset temperature difference threshold value, and completing the low-temperature starting of the fuel cell.
A third aspect of the application provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method as provided in the first aspect of the application when executing the program.
A fourth aspect of the application provides a vehicle comprising the electronic device as provided in the third aspect of the application.
As can be seen from the above, the low-temperature starting method, the device, the electronic equipment and the vehicle for the fuel cell provided by the application can determine the net output power of the fuel cell and the maximum allowable charging power of the power cell in the low-temperature starting mode, and determine the required charging power of the power cell and the required consumption power of the heating component according to the net output power and the maximum allowable charging power; then, controlling the power battery to charge according to the requested charging power, determining the temperature difference of the power battery in real time, controlling the heating assembly to heat the fuel battery and/or the power battery according to the requested consumed power, and monitoring the temperature of the cooling liquid in real time; and when the temperature difference is larger than a preset temperature difference threshold value, redistributing the net output power until the temperature of the cooling liquid of the fuel cell reaches the preset temperature threshold value, and completing the low-temperature starting of the fuel cell. The heating assembly is utilized to consume the net output power of the fuel cell, so that the problem of overcharge of the power cell under the low-temperature condition is avoided, the fuel cell and the power cell are heated, the charging power of the power cell is improved, the power cell is charged, the fuel cell is enabled to be smoothly started when the fuel cell reaches the cold starting condition, and the charging power of the power cell is smaller than the net output power of the fuel cell, and the vehicle is ensured to be electrified smoothly. And when the temperature difference is larger than a preset temperature difference threshold value, the net output power is redistributed, so that the balance of the internal temperature of the power battery is improved, and the influence of the consistency of the single battery on the service life of the power battery is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present application or related art, the drawings that are required to be used in the description of the embodiments or related art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort to those of ordinary skill in the art.
Fig. 1 is a flowchart of a low-temperature start-up method of a fuel cell according to an embodiment of the present application;
FIG. 2 is a flow chart illustrating the redistribution of net output power according to an embodiment of the present application;
FIG. 3 is a flow chart illustrating a net output power reallocation in accordance with another embodiment of the present application;
FIG. 4 is a flow chart of determining the net output power of a fuel cell and the maximum allowable charge power of a power cell in accordance with an embodiment of the present application;
FIG. 5 is a flow chart of determining a requested charge power and a requested power consumption in accordance with an embodiment of the present application;
FIG. 6 is a flow chart of heating by the heating assembly when the power battery of the embodiment of the application has charging capability;
FIG. 7 is a flow chart of heating by the heating assembly when the power battery of the embodiment of the application does not have the charging capability;
Fig. 8 is a schematic structural view of a low-temperature start-up device of a fuel cell according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the application.
Detailed Description
The present application will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "first," "second," and the like, as used in embodiments of the present application, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
In this document, it should be understood that any number of elements in the drawings is for illustration and not limitation, and that any naming is used only for distinction and not for any limitation.
Based on the above description of the background art, there are also the following cases in the related art:
when the temperature of the power battery of the vehicle using the fuel cell is lower than-15 ℃, the charging power of the power battery is low, and when the temperature of the power battery is lower than-20 ℃, the charging power of the power battery is almost 0KW; and when the temperature of the cooling liquid of the fuel cell is lower than 5 ℃, the fuel cell is started to be cold-started, and the current of the fuel cell is at least 75A in the cold-start process of the fuel cell, wherein the power generated by the fuel cell is 23KW, otherwise, the fuel cell has counter-electrode risk and influences the service life of the fuel cell, but the power of 13kW can be consumed at most by the accessories and the whole vehicle request power of the fuel cell, so the net output power of the fuel cell is 10 kW+/-1 kW, namely the net output power is the difference value between the output power and the whole vehicle request power.
Therefore, when the temperature of the power battery is lower than-15 ℃ and the electric quantity of the power battery is lower than the starting threshold value of the fuel battery, the fuel battery needs to be started in order to meet the dynamic energy balance of the vehicle and prevent the power battery from feeding, but when the temperature of the power battery of the vehicle is lower than-15 ℃, the request power of the whole vehicle is smaller and the power battery has no recharging capability (the charging power of the power battery is lower and even 0 KW), if the fuel battery is started, the output power of the fuel battery can carry out the transitional charging on the power battery, the service life of the power battery can be reduced, and at the moment, the fuel battery is not supported for starting because of the safety, the low-temperature cold starting of the vehicle can not be completed, and the customer complains.
In the emergency load reduction state, the output power of the fuel cell is only allowed to be smaller than or equal to the chargeable power of the power cell, but the charging and discharging power of the power cell is influenced by the temperature and the current electric quantity, and the chargeable power of the power cell is very small and even 0kW at low temperature, so that the service life of the power cell is possibly reduced, and at the moment, the vehicle can prohibit starting the fuel cell due to the safety consideration (because the output power of the fuel cell needs to be ensured to be smaller than or equal to the chargeable power of the power cell at low temperature, otherwise, the power cell can not be overcharged due to the unique characteristic of the fuel cell when the vehicle is braked suddenly, the service life of the power cell is reduced), the vehicle needs to be driven purely, but the vehicle can only be electrified at low power cell electric quantity, so that the low-temperature cold start of the vehicle can not be completed, and the customer complains.
In the related art, the output power of the fuel cell is requested according to the chargeable power of the power cell, when the chargeable power of the power cell is less than 5kW, the central control switch module prompts the driver to prompt the fact that the temperature of the power cell is low and heating is requested through the instrument, and the fuel cell cannot be started before the heating is completed, so that the driving experience of a customer is deteriorated. And the influence of the rapid temperature change on the power battery is not considered when the power battery is heated, so that the equilibrium of the internal temperature of the power battery is out of control, and the service life of the power battery is influenced.
The low-temperature starting method, the low-temperature starting device, the electronic equipment and the vehicle of the fuel cell can determine the net output power of the fuel cell and the maximum allowable charging power of the power cell in the low-temperature starting mode, and determine the required charging power of the power cell and the required consumption power of the heating component according to the net output power and the maximum allowable charging power; then, controlling the power battery to charge according to the requested charging power, determining the temperature difference of the power battery in real time, controlling the heating assembly to heat the fuel battery and/or the power battery according to the requested consumed power, and monitoring the temperature of the cooling liquid in real time; the heating assembly is utilized to consume the net output power of the fuel cell, so that the problem of overcharge of the power cell under the low-temperature condition is avoided, the fuel cell and the power cell are heated, the charging power of the power cell is improved, the power cell is charged, the fuel cell is enabled to be smoothly started when the fuel cell reaches the cold starting condition, and the charging power of the power cell is smaller than the net output power of the fuel cell, and the vehicle is ensured to be electrified smoothly. And when the temperature difference is larger than a preset temperature difference threshold value, the net output power is redistributed, so that the balance of the internal temperature of the power battery is improved, and the influence of the consistency of the single battery on the service life of the power battery is reduced.
A power control method of a fuel cell according to an exemplary embodiment of the present application is described below with reference to the accompanying drawings.
In some embodiments, as shown in fig. 1, a method for low temperature start-up of a fuel cell includes:
step 101: the net output power of the fuel cell and the maximum allowable charge power of the power cell in the low temperature start mode are determined.
In practice, it is possible to determine that the fuel cell is in the low-temperature start-up mode, for example, when the coolant temperature of the fuel cell is lower than 5 ℃; after the low-temperature starting mode is determined, due to the characteristic of the fuel cell, the external output power of the fuel cell is increased from 0kW to 23kW in the low-temperature starting process, then the 23kW stable output is maintained (the power is not increased when the user does not increase the power required by the whole vehicle), and the net output power is increased from 0kW to 10kW and then the 10kW stable output is maintained under the assumption that the power required by the whole vehicle (the power required by the starting is generally smaller and more stable, for example, 10kW and the power required by the vehicle to be increased when the vehicle starts to move from rest) and the available power of the accessory of the fuel cell is 13 kW. In low temperature environment, the power battery has low charging power and even can not be charged, so that the net output power of the fuel battery needs to be detected in real time for the subsequent reasonable distribution of the net output power according to the magnitude of the net output power. The maximum allowable charging power at different temperatures is the characteristic of the power battery itself, and can be determined according to a preset temperature power relation table.
It should be noted that, depending on the driving requirement of the driver, the net output power of the fuel cell may exceed 10kW, but, for protection of the power cell and the fuel cell, the maximum output power cannot exceed the sum of the maximum power consumption of the heating assembly (and the fuel cell itself assembly) and the maximum allowable charging power of the power cell at the current temperature, because if the requested power exceeds the sum, the surplus power will overcharge the power cell when an emergency load reduction is performed (the power demand of the whole vehicle is rapidly reduced to 0).
Step 102: the requested charge power of the power cell and the requested consumed power of the heating assembly are determined based on the net output power and the maximum allowable charge power.
In specific implementation, when the net output power is less than or equal to the maximum allowable charging power, it is indicated that the power battery can consume all the net output power at this time, and at this time, due to the consideration of energy recovery, all the net output power can be used for charging the power battery, so as to reduce the energy consumption, and at this time, the required power consumption of the heating assembly is zero. When the net output power is larger than the maximum allowable charge power, even if the power battery recovers the power with the maximum allowable charge power, the whole net output power cannot be consumed through recovery, so that the remaining net output power after the power battery is consumed is required to be consumed at the moment, namely the maximum allowable charge power is determined as the request charge power, and the difference between the net output power and the maximum allowable charge power is taken as the request consumed power of the heating component.
The above situation corresponds to the situation that the power battery has charging capability, and in the case that the power battery does not have charging capability (i.e., the maximum allowable charging power is 0), the requested charging power is directly determined to be 0 value, and the net output power is determined to be the requested consumption power, so as to ensure that the power battery cannot be overcharged.
Step 103: and controlling the power battery to charge according to the requested charging power, and determining the temperature difference of the power battery in real time.
In the implementation, after the required charging power of the power battery is determined, the power battery is controlled to charge according to the required charging power, so that the recovery of the net output power is realized. Because the power battery charges and the heating component heats etc. can all improve the temperature of power battery, when temperature variation is great, the inside temperature equilibrium of power battery is variation, leads to the uniformity variation of power battery monomer battery, and then influences the life of power battery, so the difference in temperature of required real-time supervision power battery to guarantee to adjust power battery before the inside temperature equilibrium variation of power battery.
The power battery is a battery pack formed by connecting a plurality of single batteries in series or in parallel, the consistency of the single power battery refers to the convergence of important characteristic parameters of a group of single power batteries, and the power battery is a relative concept, is not the most consistent, and is only more consistent. The plurality of serial/parallel power battery cells in the same power battery pack, each parameter, preferably all within a small range, are considered to be good in consistency, i.e., the closer the parameters of the cells are to the consistency the better.
If a time dimension is added to the consistency of the power battery cells in the power battery pack, the consistency refers to the consistency of all the characteristic parameters of all the power battery cells in the power battery pack in the whole life cycle, the inconsistency of capacity attenuation, the inconsistency of internal resistance increase and the inconsistency of aging rate are increased, and the final objective of focusing on the consistency is to improve the service life of the whole power battery pack.
The consistency of the performance indexes of the power battery monomer comprises: voltage, charge, capacity, internal resistance and its rate of change over time, lifetime, electrical characteristics of the electrodes, electrical connections, temperature characteristics, decay rate, self-discharge rate and its consistency over time, etc. The inconsistency of the power battery is increased after the temperature is greatly changed, and the inconsistency of the performance indexes directly affects the input and output capacity and the overall service life of the power battery pack in operation, so that the temperature difference of the power battery needs to be monitored in real time to ensure that the power battery is regulated before the temperature equilibrium inside the power battery is poor, thereby improving the consistency of single batteries of the power battery and prolonging the service life of the power battery.
Step 104: the heating component is controlled to heat the fuel cell and/or the power cell according to the requested consumed power, and the temperature of the cooling liquid of the fuel cell is monitored in real time.
In particular, for example, if the start-up type of the fuel cell is a normal temperature start-up mode, the power request may be directly made and consumed according to the thermal management requirements of the vehicle. The heating assembly is only used for heating the requested power consumption, providing heat for the fuel cell, the power cell or the whole vehicle, heating the cooling liquid of the fuel cell and the power cell through local heating or the whole vehicle thermal cycle, and monitoring the temperature of the cooling liquid of the fuel cell in real time so as to judge the exiting time of the cold start mode and the start completion state of the fuel cell.
Step 105: and redistributing the net output power until the temperature of the cooling liquid of the fuel cell reaches a preset temperature threshold value in response to the temperature difference being larger than the preset temperature difference threshold value, and completing the low-temperature starting of the fuel cell.
When the temperature difference is larger than a preset temperature difference threshold, the temperature balance inside the power battery is reduced due to larger temperature change, so that the inconsistency of the single batteries of the power battery is improved, the service life of the power battery is shortened, the power can be redistributed at the moment, the required charging power of the power battery is reduced, the priority of heating the power battery is reduced, the power battery is kept from heating up, and the consistency of the single batteries of the power battery is ensured.
The low-temperature start mode can be exited only when the temperature of the power battery exceeds-15 ℃, because the power battery has a certain recharging capability and is not easy to be overcharged, but the starting of the fuel battery is completed only when the temperature of the cooling liquid of the fuel battery reaches a preset temperature threshold of 40 ℃, optionally, when the starting of the fuel battery is completed, the power battery, the communication between the cooling liquid of the fuel battery and a thermal circulation system can be closed, and the communication between the power battery and the cooling liquid of the fuel battery and the thermal circulation system (which can be cooled through internal circulation) can be closed after the temperature reaches a certain value, so that the service lives of the power battery and the fuel battery are prevented from being influenced due to the fact that the temperatures of the power battery and the fuel battery are too high.
In summary, in the low-temperature starting method of the fuel cell provided by the embodiment of the application, the heating component is utilized to consume the net output power of the fuel cell, so that the problem of overcharge of the power cell under the low-temperature condition is avoided, the fuel cell and the power cell are heated, the charging power of the power cell is improved, the power cell is charged, and when the fuel cell reaches the cold starting condition, and the charging power of the power cell is smaller than the net output power of the fuel cell, the fuel cell is smoothly started, and the vehicle is ensured to be electrified smoothly. And when the temperature difference is larger than a preset temperature difference threshold value, the net output power is redistributed so as to improve the balance of the internal temperature of the power battery, reduce the influence of the consistency of the single battery on the service life of the power battery, and improve the service lives of the power battery and the fuel battery while ensuring the smooth starting of the fuel battery.
In some embodiments, as shown in fig. 2, redistributing the net output power includes:
step 201: the requested charging power is compared with a preset regulated power.
In specific implementation, the power can be redistributed according to preset adjusting power, that is, the power required to be charged of the power battery is reduced according to the adjusting power, and meanwhile, the power required to be consumed of the heating component is increased, the reduced power and the increased power value are both adjusting power, and the priority of heating the power battery in the heating component is also required to be reduced, that is, the other devices are heated preferentially. The power adjustment based on the fixed adjustment power requires a determination as to whether there is sufficient power to perform the adjustment, so that the power re-allocation requires a comparison of the requested charging power and the preset adjustment power. The power is redistributed according to the preset adjusting power simply and quickly, and the problem that the power reducing effect is not obvious due to the fact that the required charging power is smaller is avoided.
Step 202: in response to the requested charging power being less than or equal to the regulated power, the net output power is fully allocated as the new requested consumed power.
In the specific implementation, the required charging power is smaller than or equal to the regulating power, which means that the power which can be redistributed at one side of the power battery is not larger than the regulating power which needs to be regulated, so that all the required charging power can be transferred at the moment, and all the net output power is used for the heating assembly at the moment, namely, all the net output power is distributed to be new required consumption power, and the power output to the power battery is stopped, so that the temperature of the power battery is not increased any more, the uniformity of the internal temperature of the power battery is improved, and the influence of the uniformity of the single battery on the service life of the power battery is reduced. The redistribution of power is safe because the maximum value of net output power does not exceed the maximum power consumed by the heating assembly due to the limitation of output power.
Step 203: in response to the requested charging power being greater than the regulated power, a difference power of the requested charging power and the regulated power is determined as a new requested charging power, and a sum power of the requested consumed power and the regulated power is determined as a new requested consumed power.
In specific implementation, the requested charging power is greater than the regulated power, which means that the power which can be redistributed at one side of the power battery can meet the requirement of the regulated power, and when the requested charging power is reduced according to the regulated power, a part of power remains to continuously charge the power battery. Therefore, the requested charging power can be transferred according to the regulated power, the requested charging power is reduced, the requested consumption power is increased, the reduced power value and the increased power value are both regulated powers, namely, part of the requested charging power is distributed to the requested consumption power, the difference power between the requested charging power and the regulated power is determined to be the new requested charging power, and the sum power of the requested consumption power and the regulated power is determined to be the new requested consumption power. The power is redistributed, so that the required charging power of the power battery is reduced, the temperature of the power battery is prevented from continuously and greatly rising (the small-amplitude slow rising does not have great influence on the consistency of the single battery of the power battery), the temperature balance inside the power battery is improved, and the service life of the power battery is prolonged.
In some embodiments, as shown in fig. 3, redistributing the net output power includes:
step 301: and determining the actual regulating power according to the preset regulating proportion and the required charging power.
In specific implementation, the power can be redistributed according to the preset regulation proportion, that is, the power required to be charged of the power battery is reduced according to the regulation proportion, and meanwhile, the power reduced on one side of the power battery is used for increasing the power required to be consumed of the heating component, and the priority of heating the power battery in the heating component is also required to be reduced, that is, the other devices are heated preferentially. The actual regulated power needs to be determined according to the fixed regulation proportion, namely, the product of the requested charging power and the regulation proportion is calculated as the actual regulated power, so that the actual regulated power needs to be determined according to the preset regulation proportion and the requested charging power when power redistribution is carried out. The redistribution of power according to the adjustment ratio can ensure that the battery is continuously charged or partial heat can be generated, but the effect of slowing down the temperature rise is achieved, and the temperature balance inside the battery is maintained.
Step 302: the difference power between the requested charging power and the actual regulated power is determined as a new requested charging power, and the sum power of the requested consumed power and the actual regulated power is determined as a new requested consumed power.
In the specific implementation, the requested charging power can be transferred according to the actual adjustment power, the requested charging power is reduced, the requested consumption power is increased, the reduced power value and the increased power value are both the actual adjustment power, namely, part of the requested charging power is distributed to the requested consumption power, the difference power between the requested charging power and the actual adjustment power is determined to be the new requested charging power, and the sum power of the requested consumption power and the actual adjustment power is determined to be the new requested consumption power. The power is redistributed, so that the required charging power of the power battery is reduced, the temperature of the power battery is prevented from continuously and greatly rising (the small-amplitude slow rising does not have great influence on the consistency of the single battery of the power battery), the temperature balance inside the power battery is improved, and the service life of the power battery is prolonged.
In some embodiments, as shown in fig. 4, determining the net output power of the fuel cell and the maximum allowable charge power of the power cell in the low temperature start mode includes:
step 401: the coolant temperature of the fuel cell is obtained, and the start-up type of the fuel cell is determined based on the coolant temperature.
In particular, it is determined whether the fuel cell is in the low-temperature start mode by the temperature of the fuel cell coolant, and, for example, when the temperature of the fuel cell coolant is lower than 5 ℃, the start type of the fuel cell is determined to be the low-temperature start mode, otherwise, the start type is determined to be the normal start mode.
Step 402: in response to the start-up type being a low temperature start-up mode, the fuel cell is started up, and the output power of the fuel cell is detected in real time.
In the specific implementation, after the starting type is determined to be a low-temperature starting mode, the fuel cell is started, the output power of the fuel cell is monitored in real time, and when the output power is increased to the sum of the maximum allowable charging power of the heating assembly, the fuel cell self assembly and the power cell, the continuous increase of the output power is forbidden, and at the moment, a user is reminded of the risk of overcharging the power cell. The limitation of the output power is to ensure that the vehicle can consume all the output power when the required power of the whole vehicle is reduced to 0, and avoid damaging the power battery and other electric devices.
Step 403: and determining the required power of the whole vehicle, and determining the difference value between the output power and the required power of the whole vehicle as the net output power.
In particular, the main purpose of the output power of the fuel cell is to meet the power demand of the whole vehicle, but the power demand of the whole vehicle is smaller during starting, and a certain condition is required for successful starting of the fuel cell, the general output power may not be equal to the power demand of the whole vehicle, and generally is greater than the power demand of the whole vehicle, so that the difference between the output power and the power demand of the whole vehicle is determined as the net output power, i.e. the power which needs to be treated for outgoing.
Step 404: and determining whether the power battery has the charging capability, and if the power battery has the charging capability, determining the maximum allowable charging power of the power battery.
In particular, it is necessary to further determine whether the power battery has a charging capability, and if the power battery has a charging capability, the power battery is preferably used for recovering the net output power, but the power recovery capability of the power battery at a low temperature needs to be determined, that is, the maximum allowable charging power of the power battery needs to be determined, so that the power battery is prevented from being overcharged.
In some embodiments, as shown in fig. 5, determining the requested charge power of the power battery and the requested consumed power of the heating assembly based on the net output power and the maximum allowable charge power comprises:
step 501: the net output power is compared to the maximum allowable charge power.
In particular, the net output power is the power to be consumed, the maximum allowable charging power is the maximum power that can be recovered by the power battery, and comparing the net output power with the maximum allowable charging power can determine whether the power battery can completely recover the net output power.
Step 502: in response to the net output power being less than or equal to the maximum allowable charge power, the net output power is determined to be the requested charge power.
In the implementation, if the net output power is smaller than or equal to the maximum allowable charging power, the power battery has the capability of recovering all the net output power, and the net output power can be determined as the required charging power, so that the power battery can recover all the net output power.
Step 503: in response to the net output power being greater than the maximum allowed charging power, the maximum allowed charging power is determined as the requested charging power, and a difference between the net output power and the maximum allowed charging power is determined as the requested consumed power.
In particular, if the net output power is greater than the maximum allowable charge power, which indicates that the power battery has no capacity to recover the total net output power, the maximum allowable charge power may be determined as the requested charge power, and the power recovery is performed with the maximum capacity of the power battery as much as possible. And then, determining the difference value of the net output power and the maximum allowable charging power as the power consumption request, realizing the use and consumption of the residual power, heating the fuel cell or the power cell, and accelerating the low-temperature starting process.
In some embodiments, the heating assembly includes a first electric heater, a second electric heater, and an electronic water pump; as shown in fig. 6, controlling the heating assembly to heat the fuel cell and/or the power cell according to the requested consumed power includes:
Step 601: a first requested power of the first electric heater and a second requested power of the electronic water pump are determined.
In specific implementation, the first request power of the first electric heater and the second request power of the electronic water pump are the powers which can minimize the time consumption of the low-temperature starting process. The two electric heaters are usually arranged in the thermal management framework of the fuel cell vehicle, one electric heater is positioned on the loop where the fuel cell is positioned and is a first electric heater for heating the cooling liquid of the loop where the fuel cell is positioned; the other is positioned on the heating system loop and is a second electric heater for heating the cockpit and heating the power battery. And an electronic water pump is arranged on the loop where each electric heater is positioned.
Step 602: the request power consumption is compared with the first request power.
In particular, the requested power consumption is the power to be consumed, the first requested power is the optimal power for the operation of the first electric heater, and comparing the requested power consumption with the first requested power can determine whether the first electric heater can use all the requested power consumption and make the first electric heater operate at the optimal power.
Step 603: and controlling the first electric heater to request the power consumption to heat the fuel cell in response to the request power consumption being equal to or less than the first request power.
In the specific implementation, if the request consumption power is smaller than or equal to the first request power, it means that the first electric heater can consume all the request consumption power, and the first electric heater can be controlled to heat the fuel cell with the request consumption power, so as to heat the fuel cell and accelerate the low-temperature starting process.
Step 604: in response to the request power consumption being greater than the first request power, determining a difference power consumption between the request power consumption and the first request power, and controlling the first electric heater to heat the fuel cell at the first request power.
When the method is implemented, if the request power consumption is larger than the first request power, the first electric heater can not consume all the request power consumption, the difference value power consumption between the request power consumption and the first request power can be determined, the first electric heater is controlled to heat the fuel cell with the first request power, heating of the fuel cell with the first request power is achieved, and the low-temperature starting process is quickened.
Step 605: the difference power consumption is compared with the second requested power.
In the implementation, the difference power consumption is the power to be consumed remaining after the first electric heater consumes, the second request power is the optimal power for the operation of the electronic water pump, and comparing the difference power consumption with the second request power can determine whether the electronic water pump can use all the difference power consumption and enable the electronic water pump to operate with the optimal power.
Step 606: and controlling the electronic water pump to operate at the differential power consumption in response to the differential power consumption being less than or equal to the second request power.
In the specific implementation, if the actual difference power consumption is smaller than or equal to the second request power, the electronic water pump can consume all the difference power consumption, and can be controlled to operate at the difference power consumption, so that the pushing of the cooling liquid in the heating loop is realized, the temperature fluidity of the cooling liquid in the loop is improved, the heat transfer process is accelerated, and the low-temperature starting process is accelerated.
Step 607: and controlling the electronic water pump to heat the fuel cell at the second request power and controlling the second electric heater to heat the power cell at the difference between the difference consumption power and the second request power in response to the difference consumption power being greater than the second request power.
When the method is implemented, if the actual difference value consumption power is larger than the second request power, the fact that the electronic water pump cannot consume all the difference value consumption power is indicated, the electronic water pump is controlled to heat the fuel cell with the second request power, and the second electric heater is controlled to heat the power cell with the difference value of the difference value consumption power and the second request power, so that the pushing of the second request power to the cooling liquid in the heating loop is realized, the temperature fluidity of the cooling liquid in the loop is improved, the heat transfer process is accelerated, the low-temperature starting process is accelerated, the power cell is heated, the temperature of the power cell is increased, and the overcharge danger is avoided.
In some embodiments, as shown in fig. 7, the low temperature start-up method of the fuel cell further includes:
step 701: in response to the power battery not having charge capability, the net output power and the first requested power are compared.
In particular, when the power battery does not have the charging capability, only the heating component can consume the net output power. Comparing the net output power to the first requested power may determine whether the first electric heater may consume all of the net output power.
Step 702: and controlling the first electric heater to heat the fuel cell at the net output power in response to the net output power being equal to or less than the first requested power.
In the implementation, if the net output power is less than or equal to the first request power, it indicates that the first electric heater can consume all the net output power, and can be controlled to heat the fuel cell with the net output power, so as to accelerate the temperature rise of the fuel cell and accelerate the low-temperature start flow of the fuel cell.
Step 703: in response to the net output power being greater than the first requested power, determining a difference output power of the requested power consumption and the first requested power, and controlling the first electric heater to heat the fuel cell at the first requested power.
In the implementation, if the net output power is greater than the first request power, it indicates that the first electric heater cannot consume all the net output power, it can determine the difference output power between the request consumption power and the first request power, and control the first electric heater to heat the fuel cell with the first request power, and accelerate the temperature rise of the fuel cell with the first request power, so as to accelerate the low-temperature start flow of the fuel cell.
Step 704: the difference output power is compared with a third requested power of the second electric heater.
In specific implementation, comparing the difference output power with the third request power of the second electric heater can determine whether the second electric heater can consume all the difference output power, and the power battery cannot be charged at this time and cannot raise the temperature of the power battery, so that the power battery is heated preferentially.
Step 705: and controlling the second electric heater to heat the power battery at the difference output power in response to the difference output power being less than or equal to the third request power.
In the specific implementation, if the difference output power is smaller than or equal to the third request power, it is indicated that the second electric heater can consume all the difference output power, and the second electric heater can be controlled to heat the power battery with the difference output power, so that the power battery is preferentially heated, and overcharge of the power battery is avoided.
Step 706: and controlling the second electric heater to heat the power battery at the third request power in response to the difference output power being greater than the third request power, and controlling the electronic water pump to operate at the difference between the difference output power and the third request power.
When the method is implemented, if the difference output power is larger than the third request power, the fact that the second electric heater cannot consume all the difference output power is indicated, the second electric heater is controlled to heat the power battery with the third request power, the electronic water pump is controlled to operate with the difference between the difference output power and the third request power, the power battery is preferentially heated with the third request power, overcharge of the power battery is avoided, the electronic water pump is started to push the cooling liquid to flow, the temperature rising speed of the power battery and the fuel battery is accelerated, and the low-temperature starting process is accelerated.
It should be noted that, the method of the embodiment of the present application may be performed by a single device, for example, a computer or a server. The method of the embodiment can also be applied to a distributed scene, and is completed by mutually matching a plurality of devices. In the case of such a distributed scenario, one of the devices may perform only one or more steps of the method of an embodiment of the present application, the devices interacting with each other to accomplish the method.
It should be noted that the foregoing describes some embodiments of the present application. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
Based on the same inventive concept, the application also provides a low-temperature starting device of the fuel cell, corresponding to the method of any embodiment.
Referring to fig. 8, the low temperature start-up device of a fuel cell includes:
the power determination module 10 is configured to: determining the net output power of the fuel cell and the maximum allowable charging power of the power cell in the low-temperature starting mode;
a power distribution module 20 configured to: determining a requested charging power of the power battery and a requested consumed power of the heating assembly according to the net output power and the maximum allowable charging power;
the temperature difference determination module 30 is configured to: controlling the power battery to charge according to the charging power request, and determining the temperature difference of the power battery in real time;
A heating module 40 configured to: the heating assembly is controlled to heat the cooling liquid according to the power consumption request, and the temperature of the cooling liquid is monitored in real time;
a power determination module 50 configured to: and redistributing the net output power until the temperature of the cooling liquid of the fuel cell reaches a preset temperature threshold value in response to the temperature difference being larger than the preset temperature difference threshold value, and completing the low-temperature starting of the fuel cell.
For convenience of description, the above devices are described as being functionally divided into various modules, respectively. Of course, the functions of each module may be implemented in the same piece or pieces of software and/or hardware when implementing the present application.
The device of the foregoing embodiment is used to implement the low temperature start method of the corresponding fuel cell in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which is not described herein.
Based on the same inventive concept, the application also provides an electronic device corresponding to the method of any embodiment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the low-temperature starting method of the fuel cell of any embodiment when executing the program.
Fig. 9 shows a more specific hardware architecture of an electronic device according to this embodiment, where the device may include: a processor 1010, a memory 1020, an input/output interface 1030, a communication interface 1040, and a bus 1050. Wherein processor 1010, memory 1020, input/output interface 1030, and communication interface 1040 implement communication connections therebetween within the device via a bus 1050.
The processor 1010 may be implemented by a general-purpose CPU (Central Processing Unit ), microprocessor, application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, etc. for executing relevant programs to implement the technical solutions provided in the embodiments of the present disclosure.
The Memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory ), static storage device, dynamic storage device, or the like. Memory 1020 may store an operating system and other application programs, and when the embodiments of the present specification are implemented in software or firmware, the associated program code is stored in memory 1020 and executed by processor 1010.
The input/output interface 1030 is used to connect with an input/output module for inputting and outputting information. The input/output module may be configured as a component in a device (not shown) or may be external to the device to provide corresponding functionality. Wherein the input devices may include a keyboard, mouse, touch screen, microphone, various types of sensors, etc., and the output devices may include a display, speaker, vibrator, indicator lights, etc.
Communication interface 1040 is used to connect communication modules (not shown) to enable communication interactions of the present device with other devices. The communication module may implement communication through a wired manner (such as USB, network cable, etc.), or may implement communication through a wireless manner (such as mobile network, WIFI, bluetooth, etc.).
Bus 1050 includes a path for transferring information between components of the device (e.g., processor 1010, memory 1020, input/output interface 1030, and communication interface 1040).
It should be noted that although the above-described device only shows processor 1010, memory 1020, input/output interface 1030, communication interface 1040, and bus 1050, in an implementation, the device may include other components necessary to achieve proper operation. Furthermore, it will be understood by those skilled in the art that the above-described apparatus may include only the components necessary to implement the embodiments of the present description, and not all the components shown in the drawings.
The electronic device of the foregoing embodiment is configured to implement the low temperature start method of the corresponding fuel cell in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which is not described herein.
Based on the same inventive concept, the present application also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to perform the low-temperature start-up method of the fuel cell according to any of the above embodiments, corresponding to the method of any of the above embodiments.
The computer readable media of the present embodiments, including both permanent and non-permanent, removable and non-removable media, may be used to implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device.
The storage medium of the above embodiment stores computer instructions for causing the computer to execute the low temperature start-up method of the fuel cell according to any one of the above embodiments, and has the advantages of the corresponding method embodiments, which are not described herein.
Based on the same inventive concept, the present application also provides a vehicle including the electronic device in the above example, corresponding to the method of any of the above embodiments, and performs the low-temperature start-up method of the fuel cell of any of the above embodiments by the electronic device.
It will be appreciated that before using the technical solutions of the various embodiments in the disclosure, the user may be informed of the type of personal information involved, the range of use, the use scenario, etc. in an appropriate manner, and obtain the authorization of the user.
For example, in response to receiving an active request from a user, a prompt is sent to the user to explicitly prompt the user that the operation it is requesting to perform will require personal information to be obtained and used with the user. Therefore, the user can select whether to provide personal information to the software or hardware such as the electronic equipment, the application program, the server or the storage medium for executing the operation of the technical scheme according to the prompt information.
As an alternative but non-limiting implementation, in response to receiving an active request from a user, the manner in which the prompt information is sent to the user may be, for example, a popup, in which the prompt information may be presented in a text manner. In addition, a selection control for the user to select to provide personal information to the electronic device in a 'consent' or 'disagreement' manner can be carried in the popup window.
It will be appreciated that the above-described notification and user authorization process is merely illustrative, and not limiting of the implementations of the present disclosure, and that other ways of satisfying relevant legal regulations may be applied to the implementations of the present disclosure.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the application (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the application, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the application as described above, which are not provided in detail for the sake of brevity.
Additionally, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures, in order to simplify the illustration and discussion, and so as not to obscure the embodiments of the present application. Furthermore, the devices may be shown in block diagram form in order to avoid obscuring the embodiments of the present application, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the embodiments of the present application are to be implemented (i.e., such specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the application, it should be apparent to one skilled in the art that embodiments of the application can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive.
While the application has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.
The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, and the like, which are within the spirit and principles of the embodiments of the application, are intended to be included within the scope of the application.
Claims (10)
1. A low temperature start-up method of a fuel cell, characterized by comprising:
determining the net output power of the fuel cell and the maximum allowable charging power of the power cell in the low-temperature starting mode;
determining a requested charge power of the power battery and a requested consumed power of a heating assembly based on the net output power and the maximum allowable charge power;
controlling the power battery to charge according to the request charging power, and determining the temperature difference of the power battery in real time;
Controlling the heating assembly to heat the fuel cell and/or the power cell according to the request consumed power, and monitoring the temperature of the cooling liquid of the fuel cell in real time;
and redistributing the net output power until the temperature of the cooling liquid of the fuel cell reaches a preset temperature threshold value in response to the temperature difference being larger than the preset temperature difference threshold value, and completing the low-temperature starting of the fuel cell.
2. The method of claim 1, wherein said reallocating said net output power comprises:
comparing the request charging power with a preset regulating power;
in response to the requested charging power being less than or equal to the regulated power, all of the net output power is allocated as new requested consumed power;
in response to the requested charging power being greater than the regulated power, determining a difference power of the requested charging power and the regulated power as a new requested charging power, and determining a sum power of the requested consumed power and the regulated power as a new requested consumed power.
3. The method of claim 1, wherein said reallocating said net output power comprises:
Determining actual regulating power according to a preset regulating proportion and the request charging power;
and determining the difference power of the request charging power and the actual regulating power as new request charging power, and determining the sum power of the request consumed power and the actual regulating power as new request consumed power.
4. The method of claim 1, wherein determining the net output power of the fuel cell and the maximum allowable charge power of the power cell in the low temperature start mode comprises:
acquiring the cooling liquid temperature of the fuel cell, and determining the starting type of the fuel cell according to the cooling liquid temperature;
starting the fuel cell in response to the starting type being a low-temperature starting mode, and detecting the output power of the fuel cell in real time;
determining the required power of the whole vehicle, and determining the difference value between the output power and the required power of the whole vehicle as the net output power;
and determining whether the power battery has charging capability, and if so, determining the maximum allowable charging power of the power battery.
5. The method of claim 1, wherein the determining the requested charge power of the power battery and the requested consumed power of the heating assembly based on the net output power and the maximum allowable charge power comprises:
Comparing the net output power to the maximum allowable charge power;
determining the net output power as the requested charging power in response to the net output power being less than or equal to the maximum allowable charging power;
in response to the net output power being greater than the maximum allowed charging power, determining the maximum allowed charging power as the requested charging power and determining a difference between the net output power and the maximum allowed charging power as the requested consumed power.
6. The method of claim 1, wherein the heating assembly comprises a first electric heater, a second electric heater, and an electronic water pump;
the controlling the heating assembly to heat the fuel cell and/or the power cell according to the requested consumed power includes:
determining a first request power of the first electric heater and a second request power of the electronic water pump;
comparing the request power consumption with the first request power;
controlling the first electric heater to heat the fuel cell at the request power consumption in response to the request power consumption being equal to or less than the first request power;
Determining a difference power consumption of the request power consumption and the first power consumption in response to the request power consumption being greater than the first power consumption, and controlling the first electric heater to heat the fuel cell at the first power consumption;
comparing the differential power consumption with the second requested power;
controlling the electronic water pump to operate at the difference power consumption in response to the difference power consumption being less than or equal to the second request power;
and in response to the difference consumed power being greater than the second requested power, controlling the electronic water pump to heat the fuel cell at the second requested power, and controlling the second electric heater to heat the power cell at a difference between the difference consumed power and the second requested power.
7. The method as recited in claim 6, further comprising:
comparing the net output power to the first requested power in response to the power battery not having charging capability;
controlling the first electric heater to heat the fuel cell at the net output power in response to the net output power being less than or equal to the first requested power;
Determining a difference output power of the requested consumed power and the first requested power in response to the net output power being greater than the first requested power, and controlling the first electric heater to heat the fuel cell at the first requested power;
comparing the difference output power with a third request power of the second electric heater;
controlling the second electric heater to heat the power battery at the difference output power in response to the difference output power being less than or equal to the third request power;
and responding to the difference output power being larger than the third request power, controlling the second electric heater to heat the power battery at the third request power, and controlling the electronic water pump to operate at the difference between the difference output power and the third request power.
8. A low-temperature start-up device of a fuel cell, characterized by comprising:
a power determination module configured to: determining the net output power of the fuel cell and the maximum allowable charging power of the power cell in the low-temperature starting mode;
a power distribution module configured to: determining a requested charge power of the power battery and a requested consumed power of a heating assembly based on the net output power and the maximum allowable charge power;
A temperature difference determination module configured to: controlling the power battery to charge according to the request charging power, and determining the temperature difference of the power battery in real time;
a heating module configured to: controlling the heating assembly to heat the cooling liquid according to the request consumed power, and monitoring the temperature of the cooling liquid in real time;
a power determination module configured to: and redistributing the net output power until the temperature of the cooling liquid of the fuel cell reaches a preset temperature threshold value in response to the temperature difference being larger than the preset temperature difference threshold value, and completing the low-temperature starting of the fuel cell.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 7 when the program is executed by the processor.
10. A vehicle comprising the electronic device of claim 9.
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