CN115817208A - Automobile power system and power supply control method thereof - Google Patents
Automobile power system and power supply control method thereof Download PDFInfo
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- CN115817208A CN115817208A CN202211634997.7A CN202211634997A CN115817208A CN 115817208 A CN115817208 A CN 115817208A CN 202211634997 A CN202211634997 A CN 202211634997A CN 115817208 A CN115817208 A CN 115817208A
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- 239000000446 fuel Substances 0.000 claims abstract description 111
- 239000003990 capacitor Substances 0.000 claims abstract description 83
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 23
- 229910052739 hydrogen Inorganic materials 0.000 claims description 23
- 239000001257 hydrogen Substances 0.000 claims description 23
- 230000007935 neutral effect Effects 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 description 11
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- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000009194 climbing Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 230000014509 gene expression Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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Abstract
The disclosure provides an automobile power system and a power supply control method thereof, and belongs to the technical field of automobile batteries. This driving system includes: the super capacitor system, the power battery system and the fuel battery system are connected in parallel; the parallel output ends of the super capacitor system, the power battery system and the fuel battery system are connected with a motor through a DC/DC module; the DC/DC module is used for converting the current/voltage output by the super capacitor system and/or the power battery system and/or the fuel cell system into the current/voltage required by the motor so as to drive the wheels of the automobile to move by the motor. The power system provided by the disclosure has the advantages of long service life, low price, environmental protection, high low-temperature reliability, and low maintenance cost, and the problems of low service life, high price, inapplicability at low temperature, complex structure, large comprehensive volume, high long-term use and maintenance cost and the like of the conventional automobile power system are solved by adding the super-capacitor system.
Description
Technical Field
The disclosure relates to the technical field of automobile batteries, in particular to an automobile power system and a power supply control method thereof.
Background
The existing battery automobile power system mainly comprises a power battery system and a fuel battery system.
Among them, the power battery system has the advantage of great energy density, but it has following shortcoming: the stability and the safety are poor; the low-temperature service performance is poor; the service life is relatively short and the replacement cost is high; the manufacturing cost of the power battery is high.
The fuel cell has the advantages of high efficiency, smooth operation, no noise, good low-temperature usability and the like, but the long-term high-power output of the fuel cell system has influence on the aspects of the service life, the safety and the like of the whole system, and the power response of the fuel cell is slow.
It can be seen that the power cell system and the fuel cell system each have advantages and disadvantages. In order to improve the performance of a power system of an automobile, in recent years, a hybrid power system including a power battery system and a fuel cell system, for example, has been favored. However, hybrid power systems of power battery systems and hydrogen fuel cell systems still suffer from at least the following problems:
1. the hydrogen fuel cell system and the power cell system can greatly reduce the service life by long-time multi-frequency high-power output, and increase the use safety risk;
2. the hydrogen fuel cell system has a lot of noble metals and high price, and the power cell system needs to be recycled, thus being easy to cause environmental pollution;
3. the hydrogen fuel cell system has good low-temperature usability, the power cell system has poor low-temperature usability, in a low-temperature environment, the power battery system is basically useless and cannot play a role in mixing power;
4. the hydrogen fuel cell system and the power cell system have complex structures, large comprehensive volume and high maintenance cost after long-term use;
5. the energy of the power battery relates to an energy conversion process, and the recovery efficiency is relatively low;
6. the hydrogen fuel cell system and the power battery system in the hydrogen fuel cell automobile power system have large volumes.
Disclosure of Invention
The technical problem that this disclosure will solve is: the hybrid power system of the existing power battery system and the hydrogen fuel battery system has the problems of short service life, high price, trouble recovery or environmental pollution, poor low-temperature environment hybrid power effect, complex structure, large comprehensive volume, high long-term use and maintenance cost and low power recovery capacity and power recovery efficiency.
In order to solve the above technical problem, an embodiment of the present disclosure provides an automobile power system, including: the system comprises a super capacitor system, a power battery system, a fuel battery system, a DC/DC module and a motor;
the super capacitor system, the power battery system and the fuel battery system are connected in parallel; the parallel output ends of the super capacitor system, the power battery system and the fuel battery system are connected with a motor through a DC/DC module;
the DC/DC module is used for converting the current/voltage output by the super capacitor system and/or the power battery system and/or the fuel cell system into the current/voltage required by the motor so as to drive the wheels of the automobile to move by the motor.
In some embodiments, the fuel cell system is a hydrogen fuel cell system.
In some embodiments, the system further comprises: the power supply control module is connected with an ECU (electronic control Unit) vehicle-mounted computer of the automobile, a super capacitor system, a power battery system and a fuel battery system;
the power supply control module is used for acquiring an accelerator pedal signal of the automobile through the ECU, and controlling the super-capacitor system, the power battery system and the fuel cell system to discharge simultaneously when acquiring the current signal that the accelerator pedal of the automobile is stepped on.
In some embodiments, the power supply control module is further configured to collect, by the ECU, an engine operating state and a braking state of the vehicle, and control the fuel cell system to charge the supercapacitor system and the power cell system when an idle state in which the vehicle is currently in an engine operating state but is fully braked is collected.
In some embodiments, the power supply control module is further configured to acquire a speed value of the vehicle through the ECU, and when the current vehicle is in a constant-speed driving state, determine whether the current remaining power of the fuel cell system is higher than the required power of the motor, and if so, control the fuel cell system to charge the super capacitor system and the power cell system.
In some embodiments, the power supply control module is further configured to collect a braking state and a gear state of the vehicle through the ECU, and control the fuel cell system to charge the super-capacitor system and the power cell system when the current braking deceleration state or neutral sliding state of the vehicle is collected;
the motor is also used for recovering electric energy when the current automobile is in a braking and decelerating state or a sliding state, and the super capacitor system and the power battery system are charged by using the recovered electric energy through the power supply control module.
The embodiment of the disclosure also provides a power supply control method of the automobile power system, which is used for the automobile power system provided by the disclosure, and the fuel cell system in the system is a hydrogen fuel cell system; the control method comprises the following steps:
acquiring an accelerator pedal signal of an automobile in real time;
and when a signal that the accelerator pedal of the current automobile is stepped is acquired, the super capacitor system, the power battery system and the fuel battery system are controlled to discharge simultaneously.
In some embodiments, the step of acquiring the accelerator pedal signal of the automobile in real time further comprises: collecting the running state and the braking state of an engine of an automobile in real time;
the control method further comprises the following steps:
and when the current idling state that the automobile runs but is completely braked is acquired, controlling the fuel cell system to charge the super-capacitor system and the power battery system.
In some embodiments, the step of acquiring the accelerator pedal signal of the automobile in real time further comprises: acquiring a speed value of the automobile in real time;
the control method further comprises the following steps:
when the current automobile is in a constant-speed driving state, judging whether the residual electric energy of the current fuel cell system is higher than the required electric energy of the motor;
and if the residual electric energy of the current fuel cell system is higher than the required electric energy of the motor, controlling the fuel cell system to charge the super capacitor system and the power battery system.
In some embodiments, the step of acquiring the accelerator pedal signal of the automobile in real time further comprises: the method comprises the steps of collecting the braking state and the gear state of an automobile in real time;
the control method further comprises the following steps:
when the current automobile is in a braking deceleration state or a neutral sliding state, the fuel cell system is controlled to charge the super-capacitor system and the power battery system, electric energy is recovered through the motor, and the super-capacitor system and the power battery system are charged by using the recovered electric energy.
Through the technical scheme, the automobile power system provided by the disclosure uses the super-capacitor system and the power battery system to be matched with the fuel battery system as the automobile power system, and provides a power supply control method of the automobile power system, so that a high-efficiency hydrogen fuel battery engine system solution is formed, and the automobile power system has the following beneficial effects:
1) The super capacitor system is added in the automobile power system, the super capacitor system has high energy density, can be matched and interacted with the hydrogen fuel cell in the aspect of energy supply, has strong discharging capacity, can provide enough electric energy to drive the motor to rotate with instantaneous high torque under the working conditions of starting, accelerating and climbing, and can perfectly solve the problem that the power output of the hydrogen fuel cell system is fatigue;
2) The super capacitor in the automobile power system has long service life, the cycle life can reach 50 ten thousand times, the discharge capacity is strong, and the problems of reduced service life and increased safety risk of a fuel cell system and a power battery system due to long-time high-power output can be solved after the super capacitor is added;
3) The super capacitor in the automobile power system has high power density which can reach 300-5000W/kg, which is 5-10 times of that of a battery, and the problem that the power system occupies a large space and has low energy density can be effectively solved by adding the super capacitor, and meanwhile, the problem of short-time high power of the automobile power system is increased;
4) The product raw material composition, production, use, storage and disassembly processes of the super capacitor in the automobile power system are all pollution-free, and the super capacitor is an ideal green and environment-friendly power supply;
5) The super capacitor in the automobile power system has good ultralow temperature characteristic, and the temperature range is wide from minus 40 ℃ to plus 70 ℃, so that the working efficiency and the working reliability of the fuel cell automobile in a low-temperature environment can be improved after the super capacitor is added;
6) The charging and discharging circuit of the super capacitor system in the automobile power system is simple, and a charging circuit like a rechargeable battery is not needed, so that the safety coefficient is high, the maintenance is avoided after the super capacitor system is used for a long time, the complexity of the hydrogen fuel cell automobile power system can be greatly reduced, the space is saved, and the space utilization rate is improved;
7) The super capacitor in the automobile power system has large capacity, high energy conversion efficiency and small process loss, and can increase the power recovery capacity and the power recovery efficiency;
8) In the whole vehicle running process, the fuel cell system and the power cell system in the vehicle power system can charge the super capacitor system at any time, and under the working conditions of braking, sliding and the like, the electric energy of the motor can be directly recycled to the super capacitor system and the power cell system, so that the recycling efficiency and the energy utilization rate are improved.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an automotive power system provided in an embodiment of the present disclosure;
FIG. 2 is a schematic illustration of another exemplary embodiment of an automotive powertrain according to the present disclosure;
FIG. 3 is a schematic diagram of a power supply of an automobile power system in an idle state of an automobile according to an embodiment of the disclosure;
FIG. 4 is a schematic diagram of a power supply of an automotive power system in a constant-speed driving state of an automobile according to an embodiment of the present disclosure;
FIG. 5 is a schematic power supply diagram of a vehicle power system when a vehicle is in a braking deceleration state or a neutral coasting state according to the embodiment of the disclosure;
fig. 6 is a flowchart of a power supply control method of an automobile power system according to an embodiment of the disclosure.
Description of reference numerals:
1. a super capacitor system; 2. a power battery system; 3. a fuel cell system; 4. a DC/DC module; 5. a motor; 6. and a power supply control module.
Detailed Description
Embodiments of the present disclosure are described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the disclosure, but are not intended to limit the scope of the disclosure, which may be embodied in many different forms and are not limited to the specific embodiments disclosed herein, but include all technical solutions falling within the scope of the claims.
These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
It is noted that in the description of the present disclosure, unless otherwise indicated, "a plurality" means greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship merely to facilitate the description of the disclosure and to simplify the description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and therefore should not be construed as limiting the disclosure. When the absolute position of the object being described changes, then the relative positional relationship may also change accordingly.
Moreover, the use of "first," "second," and similar words throughout this disclosure is not intended to imply any order, quantity, or importance, but rather merely to distinguish one element from another. "vertical" is not strictly vertical, but is within the tolerance of the error. "parallel" is not strictly parallel but within the tolerance of the error. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered.
It should also be noted that, in the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood as appropriate to one of ordinary skill in the art. When a particular device is described as being between a first device and a second device, intervening devices may or may not be present between the particular device and the first device or the second device.
All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
Fig. 1 is a schematic structural diagram of an automotive power system provided in an embodiment of the present disclosure, and as shown in fig. 1, the system includes: the system comprises a super capacitor system 1, a power battery system 2, a fuel battery system 3, a DC/DC module 4 and a motor 5; the super capacitor system 1, the power battery system 2 and the fuel battery system 3 are connected in parallel; the parallel output ends of the super capacitor system 1, the power battery system 2 and the fuel battery system 3 are connected with a motor 5 through a DC/DC module 4; the DC/DC module 4 is used for converting the current/voltage output by the super capacitor system 1 and/or the power battery system 2 and/or the fuel cell system 3 into the current/voltage required by the electric motor 5, so that the electric motor 5 drives the wheels of the automobile to move.
The power system provided by the disclosure connects the super capacitor system, the power battery system and the fuel battery system in parallel, can reduce the size of the power system, reduce the maintenance cost of the system, improve the working efficiency and the working reliability of the fuel battery automobile in a low-temperature environment, and solve the problems of low service life, high price, inapplicability to low temperature, complex structure, large comprehensive volume, high long-term use and maintenance cost and the like of the conventional automobile power system.
In some embodiments, the fuel cell system 3 is a hydrogen fuel cell system. Compared with a system using a power battery alone, the system has no pollution to the environment, low operation noise and better low-temperature service performance.
In some embodiments, as shown in fig. 2, the present disclosure provides an automotive power system further comprising: the power supply control module 6 is connected with an ECU vehicle-mounted computer of an automobile, the super capacitor system 1, the power battery system 2 and the fuel cell system 3; the power supply control module 6 is used for acquiring an accelerator pedal signal of the automobile through the ECU, and controlling the super capacitor system 1, the power battery system 2 and the fuel cell system 3 to discharge simultaneously when acquiring a signal that the accelerator pedal of the automobile is stepped down currently. In the embodiments, under the working conditions of starting, accelerating, climbing and the like of the automobile with high demand on instantaneous electric energy, the super capacitor system 1, the power battery system 2 and the fuel battery system 3 discharge simultaneously, wherein the fuel battery system 3 and the power battery system 2 supply electric energy to the motor 5 through the DC/DC module 4 according to the performance of the super capacitor system 1, and the super capacitor system 1 supplies residual required electric energy to the motor 5 through the DC/DC module 4 for supplying sufficient electric energy to the motor 5, so that the demand of the whole automobile on dynamic property and backup power can be met. Through mutual matching and interaction of the super capacitor system 1, the power battery system 2 and the fuel battery system 3 in the aspect of energy supply, enough electric energy can be provided to drive a motor to rotate at an instantaneous high torque under the working conditions of starting, accelerating and climbing, and the problems of fatigue of power output of a hydrogen fuel battery system when used alone and reduction of service life and increase of safety risk of the fuel battery system and the power battery system caused by long-time high-power output of an automobile are solved.
In some embodiments, as shown in fig. 3, the power supply control module 6 is further configured to collect the engine operating state and the braking state of the vehicle through the ECU, and control the fuel cell system 3 to charge the supercapacitor system 1 and the power cell system 2 when the current idle state of the vehicle in which the engine is running but fully braking is collected. In the embodiments, when the hydrogen fuel cell automobile equipped with the super capacitor system 1 and the power battery system 2 is in an idle state in which the engine runs but is completely braked, a driver does not step on an electric door (an accelerator of a fuel vehicle), pulls up a hand brake or steps on a brake, the whole automobile has no moving demand, no specific requirement is required for the power output of the power system, and the power battery system 2 and the super capacitor system 1 can be charged through the fuel battery system 3 for energy storage operation, so that the hydrogen fuel cell automobile is applied to later high-power demand. In the embodiments, when the automobile is in an idling state, the fuel cell system 3 can be fully utilized to charge the power battery system 2 and the super capacitor system 1 in the time period, the energy storage endurance capacity of the automobile power system can be improved, and in addition, the super capacitor has large capacity, high energy conversion efficiency and small process loss, so that the power recovery capacity and the power recovery efficiency can be improved.
In some embodiments, as shown in fig. 4, the power supply control module 6 is further configured to collect a speed value of the vehicle through the ECU, and when it is collected that the current vehicle is in a constant-speed driving state, determine whether the remaining power of the current fuel cell system 3 is higher than the required power of the motor 5, and if so, control the fuel cell system 3 to charge the supercapacitor system 1 and the power cell system 2. In the embodiments, under the working conditions that there is no great demand for power at a constant speed and the like, for a fuel cell vehicle equipped with the super capacitor system 1 and the power battery system 2, if the electric energy of the super capacitor system 1 and the power battery system 2 is insufficient and the fuel cell system 3 still has surplus electric energy under the condition of supplying enough electric energy to the motor 5, the power battery system 2 and the super capacitor system 1 can be charged through the fuel cell system 3 to perform energy storage operation, and the fuel cell vehicle is used for application in the later period of high power demand. In the embodiments, when the automobile is in a constant-speed low-power state, the fuel cell system 3 is preferentially used for providing kinetic energy for the automobile, and the power cell system 2 and the super capacitor system 1 are charged, so that the advantages of the fuel cell system 3 in the low-power state are fully exerted, and the environmental protection property, the power generation efficiency and the cruising ability of the automobile power system are improved.
In some embodiments, as shown in fig. 5, the power supply control module 6 is further configured to collect, by the ECU, a braking state and a gear state of the vehicle, and control the fuel cell system 3 to charge the supercapacitor system 1 and the power cell system 2 when it is collected that the vehicle is currently in a braking deceleration state or a neutral sliding state; the motor 5 is also used for recovering electric energy when the current automobile is in a braking deceleration state or a sliding state, and the super capacitor system 1 and the power battery system 2 are charged by the recovered electric energy through the power supply control module 6. In the embodiments, under the working conditions of braking and neutral sliding of the hydrogen fuel cell automobile provided with the super capacitor system 1 and the power battery system 2, a driver does not step on an electric door (an accelerator of a fuel vehicle) and steps on a brake, the automobile is in a deceleration state, the automobile has no requirement on power, if the electric energy of the super capacitor system 1 and the power battery system 2 is insufficient, the power battery system 2 and the super capacitor system 1 can be charged through the fuel battery system 3 for energy storage operation, and the hydrogen fuel cell automobile is used for application in the later period of high power requirement; meanwhile, the electric energy can be recovered by using the motor 5 in the braking and sliding processes, and the recovered electric energy is stored in the super capacitor system 1 and the power battery system 2 for application in the later period of high power demand, so that the energy storage endurance of the automobile power system can be further improved. In addition, because the super capacitor has large capacity, high energy conversion efficiency and small process loss, the power recovery capacity and the power recovery efficiency can be increased.
In fig. 2 to 5, the direction indicated by the arrow is the charging or discharging direction of each module, and the modules which are not indicated by the arrow have no power supply relationship with each other.
Corresponding to the automobile power system provided by the embodiment of the present disclosure, the embodiment of the present disclosure further provides a power supply control method of the automobile power system, the method is used for the automobile power system provided by any one of the embodiments, and the fuel cell system 3 in the automobile power system is a hydrogen fuel cell system.
Fig. 6 is a flowchart of a power supply control method of an automotive power system according to an embodiment of the present disclosure, and as shown in fig. 6, the method includes the following steps:
s1: acquiring an accelerator pedal signal of an automobile in real time;
in the embodiment, whether the accelerator pedal signal of the automobile exists or not can be monitored and collected in real time by connecting with an ECU of the automobile, or the accelerator pedal signal of the automobile can be collected by directly connecting with an accelerator pedal sensor of the automobile and the like;
s2: when a signal that the accelerator pedal of the current automobile is stepped is acquired, the super capacitor system 1, the power battery system 2 and the fuel battery system 3 are controlled to supply power to the motor 5 at the same time.
The method of this embodiment may be used to implement the technical solution of the system embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.
In some embodiments, step S1 further comprises: collecting the running state and the braking state of an engine of an automobile in real time; specifically, the engine operating state and the braking state of the automobile can be acquired by connecting an ECU of the automobile. In these embodiments, the method further comprises step S3: when the current idling state that the automobile is in the state that the engine runs but the automobile is completely braked (the hand brake is pulled up or the brake is stepped on) is acquired, the fuel cell system 3 is controlled to charge the super capacitor system 1 and the power cell system 2.
The methods of these embodiments may be used to implement the technical solution of the system embodiment shown in fig. 3, and the implementation principle and technical effect are similar, which are not described herein again.
In some embodiments, step S1 further comprises: acquiring a speed value of the automobile in real time; specifically, the speed value of the vehicle may be collected by an ECU connected to the vehicle. In these embodiments, the method further comprises steps S4-S5:
s4: when the current automobile is in a constant-speed driving state, judging whether the residual electric energy of the current fuel cell system 3 is higher than the required electric energy of the motor 5, if so, executing S5;
s5: and controlling the fuel cell system 3 to charge the super capacitor system 1 and the power cell system 2.
The methods of these embodiments may be used to implement the technical solution of the system embodiment shown in fig. 4, and the implementation principle and technical effect are similar, which are not described herein again.
In some embodiments, step S1 further comprises: the method comprises the steps of collecting the braking state and the gear state of an automobile in real time; specifically, the braking state and the gear state of the automobile can be acquired by connecting an ECU of the automobile, or the braking state of the automobile can be acquired by directly connecting a brake of the automobile, and the gear of the automobile can be acquired by connecting the gear of the automobile. In these embodiments, the method further comprises step S6: when the current automobile is in a braking deceleration state or a neutral gear sliding state, the fuel cell system 3 is controlled to charge the super capacitor system 1 and the power cell system 2, electric energy is recycled through the motor 5, and the super capacitor system 1 and the power cell system 2 are charged by using the recycled electric energy.
The methods of these embodiments may be used to implement the technical solution of the system embodiment shown in fig. 5, and the implementation principle and technical effect are similar, which are not described herein again.
The present disclosure presents a technical route to a fuel cell system with a supercapacitor system and a power battery system to form a highly efficient fuel cell engine system solution. Structurally, the present invention has one parallel super capacitor system based on the structure of available fuel cell power system, and the added super capacitor system can provide great power electric energy for the motor without affecting the life, safety, reliability and cyclability of the power system. In the mutual connection relation of all components, the super capacitor has the advantages of high capacity, strong discharge capacity, high discharge efficiency, long cycle service life and the like, in the running process of the whole vehicle, the fuel cell system and the power cell system can charge the super capacitor system at any time, and under the working conditions of braking, sliding and the like, the electric energy of the motor can be directly recovered to the super capacitor system and the power cell system, so that the recovery efficiency and the energy utilization rate are improved.
Thus far, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict.
Claims (10)
1. An automotive power system, comprising: the system comprises a super capacitor system (1), a power battery system (2), a fuel cell system (3), a DC/DC module (4) and a motor (5);
the super capacitor system (1), the power battery system (2) and the fuel battery system (3) are connected in parallel; the parallel output ends of the super capacitor system (1), the power battery system (2) and the fuel cell system (3) are connected with the motor (5) through the DC/DC module (4);
the DC/DC module (4) is used for converting the current/voltage output by the super capacitor system (1) and/or the power battery system (2) and/or the fuel cell system (3) into the current/voltage required by the motor (5) so that the motor (5) drives the wheels of the automobile to move.
2. The automotive power system of claim 1, characterized in that the fuel cell system (3) is a hydrogen fuel cell system.
3. The automotive power system of claim 1, further comprising: the power supply control module (6) is connected with an ECU (electronic control unit) vehicle-mounted computer of an automobile, the super capacitor system (1), the power battery system (2) and the fuel battery system (3);
the power supply control module (6) is used for acquiring an accelerator pedal signal of the automobile through the ECU and controlling the super capacitor system (1), the power battery system (2) and the fuel cell system (3) to discharge simultaneously when acquiring the current signal that the accelerator pedal of the automobile is stepped.
4. The automotive power system according to claim 3, characterized in that the power supply control module (6) is further configured to collect, through the ECU, an engine running state and a braking state of the automobile, and control the fuel cell system (3) to charge the supercapacitor system (1) and the power cell system (2) when an idle state in which the automobile is running but fully braked is collected.
5. The automobile power system according to claim 3, wherein the power supply control module (6) is further configured to collect a speed value of the automobile through the ECU, and when the current automobile is in a constant speed driving state, determine whether the remaining power of the current fuel cell system (3) is higher than the required power of the motor (5); and if so, controlling the fuel cell system (3) to charge the super capacitor system (1) and the power cell system (2).
6. The automobile power system according to claim 5, characterized in that the power supply control module (6) is further configured to collect a braking state and a gear state of the automobile through the ECU, and control the fuel cell system (3) to charge the supercapacitor system (1) and the power cell system (2) when the current automobile is in a braking deceleration state or a neutral coasting state;
the motor (5) is also used for recovering electric energy when the current automobile is in a braking and decelerating state or a sliding state, and the super capacitor system (1) and the power battery system (2) are charged by the recovered electric energy through the power supply control module (6).
7. A power supply control method for an automotive power system, characterized in that it is used for the automotive power system according to claim 1 and the fuel cell system (3) is a hydrogen fuel cell system;
the method comprises the following steps:
acquiring an accelerator pedal signal of an automobile in real time;
and when a signal that the accelerator pedal of the current automobile is stepped is acquired, the super capacitor system (1), the power battery system (2) and the fuel battery system (3) are controlled to discharge simultaneously.
8. The method for controlling power supply of automotive power system according to claim 7, wherein said collecting signals of accelerator pedal of the automobile in real time further comprises: collecting the running state and the braking state of an engine of an automobile in real time;
the method further comprises the following steps:
and when the current idling state that the automobile runs but is completely braked is acquired, controlling the fuel cell system (3) to charge the super capacitor system (1) and the power battery system (2).
9. The method for controlling power supply of automotive power system according to claim 7, wherein said collecting signals of accelerator pedal of the automobile in real time further comprises: acquiring a speed value of the automobile in real time;
the method further comprises the following steps:
when the current automobile is in a constant-speed running state, judging whether the residual electric energy of the current fuel cell system (3) is higher than the required electric energy of the motor (5);
and if the residual electric energy of the current fuel cell system (3) is higher than the required electric energy of the motor (5), controlling the fuel cell system (3) to charge the super capacitor system (1) and the power cell system (2).
10. The method for controlling power supply of automotive power system according to claim 9, wherein said collecting accelerator pedal signals of the automobile in real time further comprises: the method comprises the steps of collecting the braking state and the gear state of an automobile in real time;
the method further comprises the following steps:
when the current automobile is in a braking deceleration state or a neutral gear sliding state, the fuel cell system (3) is controlled to charge the super capacitor system (1) and the power battery system (2), electric energy is recycled through the motor (5), and the super capacitor system (1) and the power battery system (2) are charged by using the recycled electric energy.
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