CN110696682A - Power control method, device and system of hydrogen fuel cell for electric bicycle - Google Patents
Power control method, device and system of hydrogen fuel cell for electric bicycle Download PDFInfo
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- CN110696682A CN110696682A CN201911053438.5A CN201911053438A CN110696682A CN 110696682 A CN110696682 A CN 110696682A CN 201911053438 A CN201911053438 A CN 201911053438A CN 110696682 A CN110696682 A CN 110696682A
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- fuel cell
- hydrogen fuel
- hydrogen
- lithium battery
- electric bicycle
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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
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
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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
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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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 relates to the technical field of fuel cells, and particularly discloses a power control method of a hydrogen fuel cell for an electric bicycle, which comprises the following steps: after a system power supply is started, judging whether the working state of the lithium battery is normal or not; if the working state of the lithium battery is normal, controlling the lithium battery to be communicated with a driving motor of the electric bicycle, and judging whether the starting condition of the hydrogen fuel battery is met; if the starting condition of the hydrogen fuel cell is met, communicating the hydrogen storage bottle with the hydrogen fuel cell; and acquiring the charge state of a lithium battery, and controlling the output power of the hydrogen fuel cell according to the charge state of the lithium battery. The invention also discloses a hydrogen fuel cell power control device and a hydrogen fuel cell power control system for the electric bicycle. The hydrogen fuel cell power control method for the electric bicycle effectively overcomes the defects of low overload capacity and poor instant response capacity of the hydrogen fuel cell, and meets the requirements of short-time heavy current overload output such as vehicle acceleration, climbing and the like.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a power control method and a power control device for a hydrogen fuel cell for an electric bicycle and a hydrogen fuel cell power system for the electric bicycle comprising the power control device for the hydrogen fuel cell for the electric bicycle.
Background
At present, lead-acid batteries or lithium ion batteries are generally adopted by electric bicycles as power sources, the universal endurance mileage is 40-60km, the charging is slow, and 4-6 hours are usually needed for one-time charging. The fuel cell is adopted as a power source of the electric bicycle, the endurance mileage is not lower than that of the existing solution and is very easy to expand, meanwhile, the hydrogenation only needs 4-6 minutes, and the use convenience is greatly improved.
However, the dynamic response capability of the fuel cell is weak, the overload capability is poor, and if the vehicle is driven by the fuel cell only, the acceleration performance and the climbing performance of the whole vehicle are greatly influenced.
Disclosure of Invention
The invention provides a power control method and a power control device of a hydrogen fuel cell for an electric bicycle and a power system of the hydrogen fuel cell for the electric bicycle comprising the power control device of the hydrogen fuel cell for the electric bicycle, which solve the problem that the dynamic response capability of a fuel cell is weak and the overload capability is poor in the related technology.
As a first aspect of the present invention, there is provided a power control method for a hydrogen fuel cell for an electric bicycle, comprising:
after a system power supply is started, judging whether the working state of the lithium battery is normal or not;
if the working state of the lithium battery is normal, controlling the lithium battery to be communicated with a driving motor of the electric bicycle, and judging whether the starting condition of the hydrogen fuel battery is met;
if the starting condition of the hydrogen fuel cell is met, communicating the hydrogen storage bottle with the hydrogen fuel cell;
and acquiring the charge state of a lithium battery, and controlling the output power of the hydrogen fuel cell according to the charge state of the lithium battery.
Further, the controlling the output power of the hydrogen fuel cell according to the state of charge of the lithium battery includes:
controlling the output power of the hydrogen fuel cell to be set at a rated power;
when the charge voltage of the lithium battery is not less than a first preset voltage, controlling the hydrogen storage bottle to be disconnected with the hydrogen fuel cell;
when the charge voltage of the lithium battery is not more than a second preset voltage, controlling the hydrogen storage bottle to be communicated with the hydrogen fuel cell;
wherein the first preset voltage is greater than the second preset voltage.
Further, the judging whether the working state of the lithium battery is normal includes:
detecting the voltage and the output current of the lithium battery;
and if the voltage and the output current of the lithium battery are both within a preset range, judging that the working state of the lithium battery is normal, otherwise, judging that the working state of the lithium battery is abnormal.
Further, if the working state of the lithium battery is abnormal, alarm information that the working state of the lithium battery is abnormal is sent out.
Further, the determining whether the start-up condition of the hydrogen fuel cell is satisfied includes:
detecting the pressure of the hydrogen storage bottle;
if the pressure of the hydrogen storage bottle is greater than a preset pressure value, controlling to open the hydrogen storage bottle;
detecting whether the low-pressure of the hydrogen output by the hydrogen storage bottle is within a preset hydrogen pressure range and detecting whether the open-circuit voltage of the hydrogen fuel cell is greater than a preset open-circuit voltage;
if the low-pressure of the hydrogen is within a preset hydrogen pressure range and the open-circuit voltage of the hydrogen fuel cell is greater than a preset open-circuit voltage, judging that the starting condition of the hydrogen fuel cell is met;
and if the low-pressure of the hydrogen is not in the preset hydrogen pressure range, or the open-circuit voltage of the hydrogen fuel cell is not greater than the preset open-circuit voltage, controlling to close the hydrogen storage bottle, and sending alarm information that the opening condition of the hydrogen fuel cell is not met.
Further, the method comprises the following steps of obtaining the state of charge of the lithium battery and controlling the output power of the hydrogen fuel cell according to the state of charge of the lithium battery:
and controlling to disconnect the lithium battery from a driving motor of the electric bicycle, and controlling to disconnect the hydrogen storage bottle from the hydrogen fuel cell.
Further, the controlling to disconnect the hydrogen storage bottle from the hydrogen fuel cell includes:
controlling to close an air inlet valve of the hydrogen fuel cell and controlling to open an exhaust valve of the hydrogen fuel cell;
controlling the evacuation of hydrogen gas within the hydrogen fuel cell;
controlling to close an exhaust valve of the hydrogen fuel cell.
As another aspect of the present invention, there is provided a hydrogen fuel cell power control device for an electric bicycle, comprising:
the judging module is used for judging whether the working state of the lithium battery is normal or not after the system power supply is started;
the first control module is used for controlling the lithium battery to be communicated with a driving motor of the electric bicycle and judging whether the starting condition of the hydrogen fuel cell is met or not if the working state of the lithium battery is normal;
the communication module is used for communicating the hydrogen storage bottle with the hydrogen fuel cell if the opening condition of the hydrogen fuel cell is met;
and the second control module is used for acquiring the charge state of the lithium battery and controlling the output power of the hydrogen fuel cell according to the charge state of the lithium battery.
As another aspect of the present invention, there is provided a hydrogen fuel cell power system for an electric bicycle, comprising: the hydrogen storage bottle, the hydrogen fuel cell, the lithium battery, the power module, the driving motor and the hydrogen fuel cell power control device for the electric bicycle are all connected with the hydrogen fuel cell power control device for the electric bicycle, and the lithium battery and the power module are all connected with the motor;
the hydrogen storage bottle is used for storing hydrogen;
the hydrogen fuel cell is used for reacting oxygen in the air with hydrogen in the hydrogen storage bottle to generate electric energy;
the lithium battery is used for providing electric energy supply;
the power control device of the hydrogen fuel cell for the electric bicycle is used for respectively detecting the starting condition of the hydrogen fuel cell and the working state and the charge state of the lithium battery and controlling the output power of the hydrogen fuel cell according to the charge state of the lithium battery;
the power module is used for controlling the output power of the hydrogen fuel cell under the control of the power control device of the hydrogen fuel cell for the electric bicycle;
the driving motor is used for driving the electric bicycle to run under the power supply of the hydrogen fuel cell and/or the lithium cell.
Further, still include:
the lithium battery current sensor is respectively connected with the lithium battery and the hydrogen fuel battery power control device for the electric bicycle, and is used for collecting the output current of the lithium battery and feeding the collected output current back to the hydrogen fuel battery power control device for the electric bicycle;
the hydrogen storage bottle pressure sensor is arranged at the gas outlet of the hydrogen storage bottle, is connected with the hydrogen fuel cell power control device for the electric bicycle, and is used for collecting the pressure of the hydrogen storage bottle and feeding the collected pressure of the hydrogen storage bottle back to the hydrogen fuel cell power control device for the electric bicycle;
the hydrogen low-pressure sensor is arranged at the air inlet of the hydrogen fuel cell and used for collecting the low-pressure of the hydrogen output by the hydrogen storage bottle and feeding the collected low-pressure of the hydrogen output by the hydrogen storage bottle back to the power control device of the hydrogen fuel cell for the electric bicycle;
and the current sensor is arranged at the output end of the hydrogen fuel cell and used for collecting the output current of the hydrogen fuel cell and feeding back the collected output current of the hydrogen fuel cell to the hydrogen fuel cell power control device for the electric bicycle.
Through the above-mentioned hydrogen fuel cell power control method for electric bicycle, use two kinds of power parallel combination of lithium cell and hydrogen fuel cell, supply power through the lithium cell when the driving motor starts, and can be through the output power of controlling hydrogen fuel cell in normal operating, so that hydrogen fuel cell can guarantee the normal driving of vehicle with less power, through possessing good power dynamic response ability and transshipping ability in the twinkling of an eye at the same time, effectively overcome the hydrogen fuel cell's own transshipping ability low, the shortcoming that the transshipping ability is poor in the twinkling of an eye, satisfy the demand that the vehicle accelerates and climbs the heavy current overload output in short-term such as slope. Compared with the traditional lead-acid battery and lithium battery scheme adopted by the electric bicycle, the hydrogen storage bottle is adopted as the fuel storage scheme, so that the hydrogen storage battery has the advantages of simple and convenient filling and long driving distance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a power control method for a hydrogen fuel cell for an electric bicycle according to the present invention.
Fig. 2 is a block diagram of a hydrogen fuel cell power system for an electric bicycle according to the present invention.
Fig. 3 is a schematic circuit diagram of a hydrogen fuel cell power system for an electric bicycle according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this embodiment, a power control method for a hydrogen fuel cell for an electric bicycle is provided, and fig. 1 is a flowchart of the power control method for a hydrogen fuel cell for an electric bicycle according to an embodiment of the present invention, as shown in fig. 1, including:
s110, judging whether the working state of the lithium battery is normal or not after the system power supply is started;
s120, if the working state of the lithium battery is normal, controlling the lithium battery to be communicated with a driving motor of the electric bicycle, and judging whether the starting condition of the hydrogen fuel battery is met;
s130, if the starting condition of the hydrogen fuel cell is met, communicating the hydrogen storage bottle with the hydrogen fuel cell;
and S140, acquiring the charge state of the lithium battery, and controlling the output power of the hydrogen fuel cell according to the charge state of the lithium battery.
Through the above-mentioned hydrogen fuel cell power control method for electric bicycle, use two kinds of power parallel combination of lithium cell and hydrogen fuel cell, supply power through the lithium cell when the driving motor starts, and can be through the output power of controlling hydrogen fuel cell in normal operating, so that hydrogen fuel cell can guarantee the normal driving of vehicle with less power, through possessing good power dynamic response ability and transshipping ability in the twinkling of an eye at the same time, effectively overcome the hydrogen fuel cell's own transshipping ability low, the shortcoming that the transshipping ability is poor in the twinkling of an eye, satisfy the demand that the vehicle accelerates and climbs the heavy current overload output in short-term such as slope. Compared with the traditional lead-acid battery and lithium battery scheme adopted by the electric bicycle, the hydrogen storage bottle is adopted as the fuel storage scheme, so that the hydrogen storage battery has the advantages of simple and convenient filling and long driving distance.
In this embodiment, a hydrogen fuel cell with a rated power of 240W, a hydrogen storage cylinder 2L @30Mpa, a lithium battery with a power of 48V (13 series/three element)/8 Ah, and a driving motor with a rated power of 170W (maximum speed and uniform speed) will be described as an example.
It should be noted that, after the user inserts the key of the electric bicycle, the system power supply is turned on, and at this time, the determining whether the working state of the lithium battery is normal includes:
detecting the voltage and the output current of the lithium battery;
and if the voltage and the output current of the lithium battery are both within a preset range, judging that the working state of the lithium battery is normal, otherwise, judging that the working state of the lithium battery is abnormal.
Specifically, the voltage of the lithium battery is detected firstly, if the voltage of the lithium battery is within a preset voltage range, the state of the lithium battery is judged to be normal, starting is allowed, otherwise, the lithium battery is judged to be insufficient in power, starting is not allowed, and power supplement needs to be carried out through an external charger.
If the voltage of the lithium battery is normal, judging the output current, if the output current is within the preset current range, judging that the working state of the lithium battery is normal, and if not, judging that the working state of the lithium battery is abnormal.
It should be noted that the preset voltage range of the lithium battery is a voltage at which the lithium battery can safely and normally operate, and conforms to the driving voltage range of the driving motor; the current preset range of the output current is a current range corresponding to the electric energy driving force required by the driving motor when the driving motor is started, that is, when the output current of the lithium battery is within the current preset range, the normal starting capability of the driving motor can be met.
It should be understood that, when the working state of the lithium battery is normal, the control system contactor is closed to communicate the lithium battery with the driving motor, so that the lithium battery can output electric energy to the driving motor.
It should also be understood that if the working state of the lithium battery is abnormal, alarm information that the working state of the lithium battery is abnormal is sent out.
Under the condition that the lithium battery normally works, the hydrogen fuel cell needs to be started, so whether the hydrogen fuel cell meets the starting condition or not needs to be judged, and whether the starting condition of the hydrogen fuel cell is met or not is judged, and the method comprises the following steps:
detecting the pressure of the hydrogen storage bottle;
if the pressure of the hydrogen storage bottle is greater than a preset pressure value, controlling to open the hydrogen storage bottle;
detecting whether the low-pressure of the hydrogen output by the hydrogen storage bottle is within a preset hydrogen pressure range and detecting whether the open-circuit voltage of the hydrogen fuel cell is greater than a preset open-circuit voltage;
if the low-pressure of the hydrogen is within a preset hydrogen pressure range and the open-circuit voltage of the hydrogen fuel cell is greater than a preset open-circuit voltage, judging that the starting condition of the hydrogen fuel cell is met;
and if the low-pressure of the hydrogen is not in the preset hydrogen pressure range, or the open-circuit voltage of the hydrogen fuel cell is not greater than the preset open-circuit voltage, controlling to close the hydrogen storage bottle, and sending alarm information that the opening condition of the hydrogen fuel cell is not met.
It can be understood that, under the normal condition of the lithium battery, the pressure of the hydrogen storage bottle is detected, if the pressure is normal and is higher than a preset pressure value (taking 10Mpa as an example here), the hydrogen gas inlet valve is opened, then whether the low-pressure of the hydrogen gas and the open-circuit voltage of the hydrogen fuel cell are normal or not is detected, if the low-pressure of the hydrogen gas is in a preset hydrogen pressure range (taking 0.3 ~ 0.6.6 bar as an example here) and the open-circuit voltage of the hydrogen fuel cell is higher than the preset open-circuit voltage (taking 30V as an example here), the opening condition of the hydrogen fuel cell is determined to be satisfied, if the low-pressure or the open-circuit voltage does not satisfy the opening condition, the hydrogen gas inlet valve is closed, the fault information is reported, at the moment.
Specifically, the controlling the output power of the hydrogen fuel cell according to the state of charge of the lithium battery includes:
controlling the output power of the hydrogen fuel cell to be set at a rated power;
when the charge voltage of the lithium battery is not less than a first preset voltage, controlling the hydrogen storage bottle to be disconnected with the hydrogen fuel cell;
when the charge voltage of the lithium battery is not more than a second preset voltage, controlling the hydrogen storage bottle to be communicated with the hydrogen fuel cell;
wherein the first preset voltage is greater than the second preset voltage.
It should be understood that after the hydrogen fuel cell is started normally, the output power of the fuel cell is controlled to 240W of rated power according to the state of charge (SOC) of the lithium battery; when the total pressure of the lithium battery reaches a first preset voltage (taking 50.7V as an example here), the hydrogen fuel cell enters a sleep standby mode, and an air inlet valve is closed; when the total pressure of the lithium battery is reduced to a second preset voltage (46.8V is taken as an example here), the hydrogen fuel cell automatically wakes up, and the step of turning on the hydrogen fuel cell is entered.
Specifically, the method further comprises the following steps of obtaining the state of charge of the lithium battery and controlling the output power of the hydrogen fuel cell according to the state of charge of the lithium battery:
and controlling to disconnect the lithium battery from a driving motor of the electric bicycle, and controlling to disconnect the hydrogen storage bottle from the hydrogen fuel cell.
Further specifically, the controlling to disconnect the hydrogen storage bottle from the hydrogen fuel cell includes:
controlling to close an air inlet valve of the hydrogen fuel cell and controlling to open an exhaust valve of the hydrogen fuel cell;
controlling the evacuation of hydrogen gas within the hydrogen fuel cell;
controlling to close an exhaust valve of the hydrogen fuel cell.
It will be appreciated that the key is turned off, the lithium battery contactor is opened and the hydrogen fuel cell enters the shutdown mode. And when the hydrogen fuel cell is in a shutdown mode, closing the air inlet valve, opening the exhaust valve, exhausting hydrogen in the hydrogen fuel cell, closing the exhaust valve, completing shutdown of the hydrogen fuel cell, and automatically powering off the system.
As another embodiment of the present invention, there is provided a hydrogen fuel cell power control device for an electric bicycle, including:
the judging module is used for judging whether the working state of the lithium battery is normal or not after the system power supply is started;
the first control module is used for controlling the lithium battery to be communicated with a driving motor of the electric bicycle and judging whether the starting condition of the hydrogen fuel cell is met or not if the working state of the lithium battery is normal;
the communication module is used for communicating the hydrogen storage bottle with the hydrogen fuel cell if the opening condition of the hydrogen fuel cell is met;
and the second control module is used for acquiring the charge state of the lithium battery and controlling the output power of the hydrogen fuel cell according to the charge state of the lithium battery.
Through above-mentioned hydrogen fuel cell power control device for electric bicycle, use two kinds of parallelly connected combinations of lithium cell and hydrogen fuel cell, supply power through the lithium cell when driving motor starts, and can pass through the output of control hydrogen fuel cell when normal operating, so that hydrogen fuel cell can guarantee the normal driving of vehicle with less power, simultaneously through possessing good power dynamic response ability and overload capacity in the twinkling of an eye, it is low to have effectively overcome hydrogen fuel cell's overload capacity itself, respond poor shortcoming of ability in the twinkling of an eye, satisfy the demand that the vehicle accelerates and heavy current overload output for a short time such as climbing. Compared with the traditional lead-acid battery and lithium battery scheme adopted by the electric bicycle, the hydrogen storage bottle is adopted as the fuel storage scheme, so that the hydrogen storage battery has the advantages of simple and convenient filling and long driving distance.
As another embodiment of the present invention, there is provided a hydrogen fuel cell power system for an electric bicycle, as shown in fig. 2, including: the hydrogen storage bottle, the hydrogen fuel cell, the lithium battery, the power module, the driving motor and the hydrogen fuel cell power control device for the electric bicycle are all connected with the hydrogen fuel cell power control device for the electric bicycle, and the lithium battery and the power module are all connected with the motor;
the hydrogen storage bottle is used for storing hydrogen;
the hydrogen fuel cell is used for reacting oxygen in the air with hydrogen in the hydrogen storage bottle to generate electric energy;
the lithium battery is used for providing electric energy supply;
the power control device of the hydrogen fuel cell for the electric bicycle is used for respectively detecting the starting condition of the hydrogen fuel cell and the working state and the charge state of the lithium battery and controlling the output power of the hydrogen fuel cell according to the charge state of the lithium battery;
the power module is used for controlling the output power of the hydrogen fuel cell under the control of the power control device of the hydrogen fuel cell for the electric bicycle;
the driving motor is used for driving the electric bicycle to run under the power supply of the hydrogen fuel cell and/or the lithium cell.
Through above-mentioned hydrogen fuel cell power system for electric bicycle, use two kinds of power parallelly connected combinations of lithium cell and hydrogen fuel cell, supply power through the lithium cell when driving motor starts, and can pass through the output of control hydrogen fuel cell when normal operating, so that hydrogen fuel cell can guarantee the normal driving of vehicle with less power, simultaneously through possessing good power dynamic response ability and overload capacity in the twinkling of an eye, effectively overcome hydrogen fuel cell's overload capacity itself low, the shortcoming that response capacity is poor in the twinkling of an eye, satisfy the demand that the vehicle accelerates and climbs the heavy current overload output for a short time such as slope. Compared with the traditional lead-acid battery and lithium battery scheme adopted by the electric bicycle, the hydrogen storage bottle is adopted as the fuel storage scheme, so that the hydrogen storage battery has the advantages of simple and convenient filling and long driving distance.
Preferably, the power supply module may specifically include a DC-DC power supply module, and the specific DC-DC power supply module may be as shown in fig. 3.
Specifically, as shown in fig. 3, the method further includes: the lithium battery current sensor is respectively connected with the lithium battery and the hydrogen fuel battery power control device for the electric bicycle, and is used for collecting the output current of the lithium battery and feeding the collected output current back to the hydrogen fuel battery power control device for the electric bicycle;
the hydrogen storage bottle pressure sensor is arranged at the gas outlet of the hydrogen storage bottle, is connected with the hydrogen fuel cell power control device for the electric bicycle, and is used for collecting the pressure of the hydrogen storage bottle and feeding the collected pressure of the hydrogen storage bottle back to the hydrogen fuel cell power control device for the electric bicycle;
the hydrogen low-pressure sensor is arranged at the air inlet of the hydrogen fuel cell and used for collecting the low-pressure of the hydrogen output by the hydrogen storage bottle and feeding the collected low-pressure of the hydrogen output by the hydrogen storage bottle back to the power control device of the hydrogen fuel cell for the electric bicycle;
and the current sensor is arranged at the output end of the hydrogen fuel cell and used for collecting the output current of the hydrogen fuel cell and feeding back the collected output current of the hydrogen fuel cell to the hydrogen fuel cell power control device for the electric bicycle.
As shown in fig. 3, when the hydrogen gas in the hydrogen fuel cell is discharged before the hydrogen fuel cell is turned off, evacuation of the hydrogen gas in the hydrogen fuel cell can be achieved by controlling the intake solenoid valve to be closed and the exhaust solenoid valve to be opened.
In addition, when the communication between the hydrogen storage bottle and the hydrogen fuel cell needs to be cut off, the hydrogen storage bottle valve can be closed and the air inlet electromagnetic valve can be closed.
It should be noted that the alarm information described above can be displayed on the liquid crystal display, and therefore, the display on the liquid crystal display can be controlled by the hydrogen fuel cell power control device for the electric bicycle.
Preferably, as shown in fig. 3, the hydrogen fuel cell power control for the electric bicycle can perform signal transmission with the DC-DC power module and the liquid crystal panel through the 485 communication port.
Preferably, the hydrogen fuel cell power control device for the electric bicycle can be realized by adopting a single chip microcomputer.
The circuit structures of the diode, the transformer, and the like shown in fig. 3 are well known to those skilled in the art and will not be described herein.
In the hydrogen fuel cell power system for the electric bicycle provided by the embodiment, when the hydrogen fuel cell is connected in parallel with the lithium battery through the DC-DC, the DC-DC can ensure that the output is maintained at a stable voltage value. The hydrogen fuel cell power system for the general electric bicycle is mainly divided into the following three working conditions when in work:
1. when the voltage of the hydrogen fuel cell is higher than that of the lithium battery, the hydrogen fuel cell can charge the lithium battery while supplying power to the driving motor, and after the lithium battery is fully charged, the charging loop can be opened or cut off as required.
2. When the hydrogen fuel cell is in voltage with the lithium battery, the hydrogen fuel cell and the lithium battery simultaneously supply power to the driving motor.
3. When the voltage of the hydrogen fuel cell is lower than that of the lithium battery, the lithium battery supplies power for the driving motor, and meanwhile, the DC-DC has an isolation function, so that the voltage of the lithium battery cannot be fed back to the hydrogen fuel cell.
When a vehicle normally runs, the whole power system is generally in a first working mode, namely, the power system is mainly powered by a hydrogen fuel cell. When the vehicle is climbing a hill or accelerating, the entire powertrain is typically in the second and third modes of operation. When the system is in a rapid acceleration state, the whole power system is generally in a third working mode.
The hydrogen fuel cell power system for the electric bicycle that this embodiment provided compares in pure fuel cell power system, owing to adopted "electricity" intermix technique for whole power system has the overload ability reinforce, and the fast advantage of dynamic response speed in the twinkling of an eye.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A power control method of a hydrogen fuel cell for an electric bicycle is characterized by comprising the following steps:
after a system power supply is started, judging whether the working state of the lithium battery is normal or not;
if the working state of the lithium battery is normal, controlling the lithium battery to be communicated with a driving motor of the electric bicycle, and judging whether the starting condition of the hydrogen fuel battery is met;
if the starting condition of the hydrogen fuel cell is met, communicating the hydrogen storage bottle with the hydrogen fuel cell;
and acquiring the charge state of a lithium battery, and controlling the output power of the hydrogen fuel cell according to the charge state of the lithium battery.
2. The power control method of a hydrogen fuel cell for an electric bicycle according to claim 1, wherein the controlling of the output power of the hydrogen fuel cell according to the state of charge of the lithium battery includes:
controlling the output power of the hydrogen fuel cell to be set at a rated power;
when the charge voltage of the lithium battery is not less than a first preset voltage, controlling the hydrogen storage bottle to be disconnected with the hydrogen fuel cell;
when the charge voltage of the lithium battery is not more than a second preset voltage, controlling the hydrogen storage bottle to be communicated with the hydrogen fuel cell;
wherein the first preset voltage is greater than the second preset voltage.
3. The power control method of a hydrogen fuel cell for an electric bicycle according to claim 1, wherein the determining whether the operating state of the lithium battery is normal includes:
detecting the voltage and the output current of the lithium battery;
and if the voltage and the output current of the lithium battery are both within a preset range, judging that the working state of the lithium battery is normal, otherwise, judging that the working state of the lithium battery is abnormal.
4. The power control method of a hydrogen fuel cell for an electric bicycle according to claim 1 or 3, characterized in that if the operating state of the lithium battery is abnormal, an alarm message that the operating state of the lithium battery is abnormal is issued.
5. The power control method of a hydrogen fuel cell for an electric bicycle according to claim 1, wherein the determining whether the start-up condition of the hydrogen fuel cell is satisfied includes:
detecting the pressure of the hydrogen storage bottle;
if the pressure of the hydrogen storage bottle is greater than a preset pressure value, controlling to open the hydrogen storage bottle;
detecting whether the low-pressure of the hydrogen output by the hydrogen storage bottle is within a preset hydrogen pressure range and detecting whether the open-circuit voltage of the hydrogen fuel cell is greater than a preset open-circuit voltage;
if the low-pressure of the hydrogen is within a preset hydrogen pressure range and the open-circuit voltage of the hydrogen fuel cell is greater than a preset open-circuit voltage, judging that the starting condition of the hydrogen fuel cell is met;
and if the low-pressure of the hydrogen is not in the preset hydrogen pressure range, or the open-circuit voltage of the hydrogen fuel cell is not greater than the preset open-circuit voltage, controlling to close the hydrogen storage bottle, and sending alarm information that the opening condition of the hydrogen fuel cell is not met.
6. The power control method of a hydrogen fuel cell for an electric bicycle according to claim 1, further comprising, after the step of obtaining the state of charge of a lithium battery and controlling the output power of the hydrogen fuel cell according to the state of charge of the lithium battery:
and controlling to disconnect the lithium battery from a driving motor of the electric bicycle, and controlling to disconnect the hydrogen storage bottle from the hydrogen fuel cell.
7. The power control method of a hydrogen fuel cell for an electric bicycle according to claim 6, wherein the controlling to disconnect the hydrogen storage bottle from the hydrogen fuel cell includes:
controlling to close an air inlet valve of the hydrogen fuel cell and controlling to open an exhaust valve of the hydrogen fuel cell;
controlling the evacuation of hydrogen gas within the hydrogen fuel cell;
controlling to close an exhaust valve of the hydrogen fuel cell.
8. A hydrogen fuel cell power control device for an electric bicycle, comprising:
the judging module is used for judging whether the working state of the lithium battery is normal or not after the system power supply is started;
the first control module is used for controlling the lithium battery to be communicated with a driving motor of the electric bicycle and judging whether the starting condition of the hydrogen fuel cell is met or not if the working state of the lithium battery is normal;
the communication module is used for communicating the hydrogen storage bottle with the hydrogen fuel cell if the opening condition of the hydrogen fuel cell is met;
and the second control module is used for acquiring the charge state of the lithium battery and controlling the output power of the hydrogen fuel cell according to the charge state of the lithium battery.
9. A hydrogen fuel cell power system for an electric bicycle, comprising: the hydrogen storage bottle, the hydrogen fuel cell, the lithium battery, the power module, the driving motor and the hydrogen fuel cell power control device for the electric bicycle as claimed in claim 8, wherein the hydrogen storage bottle, the hydrogen fuel cell, the power module and the lithium battery are all connected with the hydrogen fuel cell power control device for the electric bicycle, and the lithium battery and the power module are all connected with the motor;
the hydrogen storage bottle is used for storing hydrogen;
the hydrogen fuel cell is used for reacting oxygen in the air with hydrogen in the hydrogen storage bottle to generate electric energy;
the lithium battery is used for providing electric energy supply;
the power control device of the hydrogen fuel cell for the electric bicycle is used for respectively detecting the starting condition of the hydrogen fuel cell and the working state and the charge state of the lithium battery and controlling the output power of the hydrogen fuel cell according to the charge state of the lithium battery;
the power module is used for controlling the output power of the hydrogen fuel cell under the control of the power control device of the hydrogen fuel cell for the electric bicycle;
the driving motor is used for driving the electric bicycle to run under the power supply of the hydrogen fuel cell and/or the lithium cell.
10. The hydrogen fuel cell power system for electric bicycles of claim 9, further comprising:
the lithium battery current sensor is respectively connected with the lithium battery and the hydrogen fuel battery power control device for the electric bicycle, and is used for collecting the output current of the lithium battery and feeding the collected output current back to the hydrogen fuel battery power control device for the electric bicycle;
the hydrogen storage bottle pressure sensor is arranged at the gas outlet of the hydrogen storage bottle, is connected with the hydrogen fuel cell power control device for the electric bicycle, and is used for collecting the pressure of the hydrogen storage bottle and feeding the collected pressure of the hydrogen storage bottle back to the hydrogen fuel cell power control device for the electric bicycle;
the hydrogen low-pressure sensor is arranged at the air inlet of the hydrogen fuel cell and used for collecting the low-pressure of the hydrogen output by the hydrogen storage bottle and feeding the collected low-pressure of the hydrogen output by the hydrogen storage bottle back to the power control device of the hydrogen fuel cell for the electric bicycle;
and the current sensor is arranged at the output end of the hydrogen fuel cell and used for collecting the output current of the hydrogen fuel cell and feeding back the collected output current of the hydrogen fuel cell to the hydrogen fuel cell power control device for the electric bicycle.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111431167A (en) * | 2020-05-14 | 2020-07-17 | 洛阳智能农业装备研究院有限公司 | Power supply control system and method for hydrogen fuel cell and lithium battery of electric tractor |
| CN111463458A (en) * | 2020-03-24 | 2020-07-28 | 浙江高成绿能科技有限公司 | Energy and pressure pipe control method and system for on-site hydrogen production fuel cell system |
| CN111993910A (en) * | 2020-09-02 | 2020-11-27 | 江苏集萃安泰创明先进能源材料研究院有限公司 | Hydrogen fuel cell assisted bicycle control system and control method thereof |
| CN113071375A (en) * | 2021-03-26 | 2021-07-06 | 永安行科技股份有限公司 | Hydrogen fuel electric vehicle and management method and system thereof |
| CN113071377A (en) * | 2021-04-06 | 2021-07-06 | 佛山仙湖实验室 | Power supply power distribution method based on running state of hybrid electric vehicle |
| CN114312492A (en) * | 2022-03-03 | 2022-04-12 | 杭叉集团股份有限公司 | Hydrogen fuel cell forklift and power-on and power-off control system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111463458A (en) * | 2020-03-24 | 2020-07-28 | 浙江高成绿能科技有限公司 | Energy and pressure pipe control method and system for on-site hydrogen production fuel cell system |
| CN111431167A (en) * | 2020-05-14 | 2020-07-17 | 洛阳智能农业装备研究院有限公司 | Power supply control system and method for hydrogen fuel cell and lithium battery of electric tractor |
| CN111993910A (en) * | 2020-09-02 | 2020-11-27 | 江苏集萃安泰创明先进能源材料研究院有限公司 | Hydrogen fuel cell assisted bicycle control system and control method thereof |
| CN113071375A (en) * | 2021-03-26 | 2021-07-06 | 永安行科技股份有限公司 | Hydrogen fuel electric vehicle and management method and system thereof |
| CN113071377A (en) * | 2021-04-06 | 2021-07-06 | 佛山仙湖实验室 | Power supply power distribution method based on running state of hybrid electric vehicle |
| CN114312492A (en) * | 2022-03-03 | 2022-04-12 | 杭叉集团股份有限公司 | Hydrogen fuel cell forklift and power-on and power-off control system thereof |
| CN114312492B (en) * | 2022-03-03 | 2022-06-14 | 杭叉集团股份有限公司 | Hydrogen fuel cell forklift and power-on and power-off control system thereof |
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