阅读说明：本技术 一种燃料电池氢能汽车电源系统及其管理方法 (Fuel cell hydrogen energy automobile power supply system and management method thereof ) 是由 李昌泉 郝义国 魏永琪 于 2020-12-17 设计创作，主要内容包括：本发明提供一种燃料电池氢能汽车电源系统及其管理方法,包括中央控制单元、燃料电池、超级电容、驱动电机以及分别控制燃料电池、超级电容、驱动电机的燃料电池控制模块、超级电容控制模块和驱动电机控制模块,超级电容与燃料电池并联,中央控制单元同时与燃料电池控制模块、超级电容控制模块和驱动电机控制模块通过控制导线相连。本发明的有益效果为:该电源系统的超级电容可在氢能汽车加速时,辅助燃料电池供电,提高氢能汽车的加速性能,且该超级电容可回收驱动电机减速时产生的电能；采用该管理方法可使该电源系统中的超级电容长时间处于适宜的电量范围内,从而可使该电源系统中的超级电容在氢能汽车行驶过程中随时处于可工作的状态。(The invention provides a fuel cell hydrogen energy automobile power supply system and a management method thereof, wherein the fuel cell hydrogen energy automobile power supply system comprises a central control unit, a fuel cell, a super capacitor, a driving motor, a fuel cell control module, a super capacitor control module and a driving motor control module, wherein the fuel cell control module, the super capacitor and the driving motor are respectively used for controlling the fuel cell, the super capacitor and the driving motor, the super capacitor is connected with the fuel cell in parallel, and the central control unit is simultaneously connected with the fuel cell control module, the super capacitor control module and the driving motor control module through control wires. The super capacitor of the power supply system can assist the fuel cell to supply power when the hydrogen energy automobile accelerates, so that the acceleration performance of the hydrogen energy automobile is improved, and the super capacitor can recover electric energy generated when the driving motor decelerates; by adopting the management method, the super capacitor in the power supply system can be in a proper electric quantity range for a long time, so that the super capacitor in the power supply system can be in a working state at any time in the running process of a hydrogen energy automobile.)

1. The utility model provides a fuel cell hydrogen can car electrical power generating system which characterized in that: including central control unit, fuel cell, super capacitor, driving motor and control fuel cell respectively, super capacitor, driving motor's fuel cell control module, super capacitor control module and driving motor control module, fuel cell and driving motor link to each other through the circular telegram wire and constitute a closed circuit, super capacitor and fuel cell are parallelly connected, material battery control module, super capacitor control module and driving motor control module are respectively through control wire and fuel cell, super capacitor, driving motor links to each other, and central control unit simultaneously with fuel cell control module, super capacitor control module and driving motor control module link to each other through control wire, super capacitor is used for assisting fuel cell to supply power and retrieve the electric energy that produces when driving motor slows down to driving motor.

2. The fuel cell hydrogen energy automobile power supply system according to claim 1, characterized in that: the power supply system also comprises an acceleration and deceleration sensor which is connected with the central control unit and used for sensing the stroke states of an accelerator pedal and a brake pedal of the hydrogen energy automobile and transmitting signals of the stroke states to the central control unit.

3. The fuel cell hydrogen energy automobile power supply system according to claim 2, characterized in that: the central control unit judges the acceleration and deceleration state required by the automobile according to the stroke state signal transmitted by the acceleration and deceleration sensor, and controls the states of the fuel cell, the super capacitor and the driving motor by controlling the fuel cell control module, the super capacitor control module and the driving motor control module, thereby realizing the acceleration and deceleration control and the energy recovery of the hydrogen energy automobile.

4. A method for managing a power supply system of a fuel cell hydrogen-powered vehicle according to claim 3, characterized in that: the method comprises the following steps:

s1, the acceleration and deceleration sensor senses the travel state of an accelerator pedal and a brake pedal of the hydrogen energy automobile and transmits the sensed travel state signals to the central control unit;

s2: the central control unit detects a stroke state signal transmitted by the acceleration and deceleration sensor in real time, judges the acceleration and deceleration state required by the hydrogen energy automobile, if the hydrogen energy automobile is in the acceleration state, the central control unit executes the step S21, if the hydrogen energy automobile is in the deceleration state, the central control unit executes the step S22, and if the hydrogen energy automobile is in the original speed keeping running state, the central control unit executes the step S23;

s21: the central control unit detects the electric quantity state of the stage capacitor, if the electric quantity of the super capacitor is larger than the lowest limit value, the central control unit controls the fuel cell and the super capacitor to simultaneously supply power to the driving motor, and the output power of the fuel cell is increased, so that the hydrogen energy automobile is quickly accelerated until the central control unit judges that the hydrogen energy automobile is not in an acceleration state; if the electric quantity of the super capacitor is smaller than or equal to the lowest limit value, the central control unit only controls the fuel cell to improve the output power, so that the hydrogen energy automobile is accelerated until the central control unit judges that the hydrogen energy automobile is not in an acceleration state;

s22: the central control unit detects the electric quantity state of the stage capacitor, if the electric quantity of the super capacitor is smaller than the maximum limit value, the central control unit controls the fuel cell to stop supplying power to the driving motor, so that the hydrogen energy automobile naturally decelerates through driving resistance, and meanwhile, the central control unit controls the super capacitor to be in an electric energy recovery state and recovers electric energy generated by the deceleration of the driving motor until the central control unit judges that the super capacitor is not in the deceleration state; if the electric quantity of the super capacitor is larger than the maximum limit value, the central control unit controls the fuel cell and the super capacitor to be disconnected from the closed circuit at the same time, so that the hydrogen energy automobile naturally decelerates only through the driving resistance until the central control unit judges that the hydrogen energy automobile is not in a deceleration state;

s23: the central control unit detects the electric quantity state of the stage capacitor, and if the electric quantity of the super capacitor is greater than the highest limit value, the central control unit controls the fuel cell to reduce the output power and enables the super capacitor to supply power to the driving motor until the electric quantity of the super capacitor is lower than the highest limit value; if the electric quantity of the super capacitor is smaller than the lowest limit value, the central control unit controls the fuel cell to increase the output power, so that the fuel cell charges the super capacitor while supplying power to the driving motor until the electric quantity of the super capacitor reaches the optimal electric quantity value; and if the electric quantity of the super capacitor is between the lowest limit value and the lowest limit value, the central control unit controls the power supply system to be in the original state.

5. The management method of the fuel cell hydrogen energy automobile power supply system according to claim 4, characterized in that: the lowest limit value of the electric quantity of the super capacitor is a fixed value which is between 20% and 40% of the total capacity of the super capacitor, the highest limit value of the electric quantity of the super capacitor is a fixed value which is between 85% and 98% of the total capacity of the super capacitor, and the optimal electric quantity value of the super capacitor is a fixed value which is between 55% and 65% of the total capacity of the super capacitor.

6. The management method of the fuel cell hydrogen energy automobile power supply system according to claim 4, characterized in that: in step S23, the central control unit keeps the total input power of the drive motors constant.

Technical Field

The invention relates to the field of fuel cell hydrogen energy automobiles, in particular to a fuel cell hydrogen energy automobile power supply system and a management method thereof.

Background

The output characteristic of the current fuel cell is relatively weak, and the instantaneous output power is not high, so that an auxiliary energy source can be carried by a power supply system of the existing fuel cell hydrogen energy automobile (hereinafter referred to as a hydrogen energy automobile) to supplement the fuel cell so as to improve the instantaneous power of the existing fuel cell hydrogen energy automobile. Therefore, in order to improve the acceleration performance and durability of the hydrogen powered vehicle, a power supply system having an increased instantaneous power of the fuel cell and a longer life is required.

Disclosure of Invention

In order to solve the above problems, the present invention provides a fuel cell hydrogen energy automobile power supply system, which comprises a central control unit, a fuel cell, a super capacitor, a driving motor, a fuel cell control module, a super capacitor control module and a driving motor control module, wherein the fuel cell control module, the super capacitor control module and the driving motor control module respectively control the fuel cell, the super capacitor and the driving motor, the fuel cell and the driving motor are connected through a power-on wire to form a closed loop, the super capacitor is connected with the fuel cell in parallel, the fuel cell control module, the super capacitor control module and the driving motor control module are respectively connected with the fuel cell, the super capacitor and the driving motor through control wires, and the central control unit is simultaneously connected with the fuel cell control module, the super capacitor control module and the driving motor control module through control wires, and the super capacitor is used for assisting the fuel cell to supply power to the driving motor and recovering electric energy generated when the driving motor decelerates.

Furthermore, the power supply system also comprises an acceleration and deceleration sensor which is connected with the central control unit and used for sensing the stroke states of an accelerator pedal and a brake pedal of the hydrogen energy automobile and transmitting signals of the stroke states to the central control unit.

Further, the central control unit judges the acceleration and deceleration state required by the automobile according to the stroke state signal transmitted by the acceleration and deceleration sensor, and controls the rotation states of the fuel cell, the super capacitor and the driving motor by controlling the fuel cell control module, the super capacitor control module and the driving motor control module, so that the acceleration and deceleration control and the energy recovery of the hydrogen energy automobile are realized.

The invention also provides a management method of the hydrogen energy automobile power supply system based on the fuel cell, which comprises the following steps:

s1, the acceleration and deceleration sensor senses the travel state of an accelerator pedal and a brake pedal of the hydrogen energy automobile and transmits the sensed travel state signals to the central control unit;

s2: the central control unit detects a stroke state signal transmitted by the acceleration and deceleration sensor in real time, judges the acceleration and deceleration state required by the hydrogen energy automobile, if the hydrogen energy automobile is in the acceleration state, the central control unit executes the step S21, if the hydrogen energy automobile is in the deceleration state, the central control unit executes the step S22, and if the hydrogen energy automobile is in the original speed keeping running state, the central control unit executes the step S23;

s21: the central control unit detects the electric quantity state of the stage capacitor, if the electric quantity of the super capacitor is larger than the lowest limit value, the central control unit controls the fuel cell and the super capacitor to simultaneously supply power to the driving motor, and the output power of the fuel cell is increased, so that the hydrogen energy automobile is quickly accelerated until the central control unit judges that the hydrogen energy automobile is not in an acceleration state; if the electric quantity of the super capacitor is smaller than or equal to the lowest limit value, the central control unit only controls the fuel cell to improve the output power, so that the hydrogen energy automobile is accelerated until the central control unit judges that the hydrogen energy automobile is not in an acceleration state;

s22: the central control unit detects the electric quantity state of the stage capacitor, if the electric quantity of the super capacitor is smaller than the maximum limit value, the central control unit controls the fuel cell to stop supplying power to the driving motor, so that the hydrogen energy automobile naturally decelerates through driving resistance, and meanwhile, the central control unit controls the super capacitor to be in an electric energy recovery state and recovers electric energy generated by the deceleration of the driving motor until the central control unit judges that the super capacitor is not in the deceleration state; if the electric quantity of the super capacitor is larger than the maximum limit value, the central control unit controls the fuel cell and the super capacitor to be disconnected from the closed circuit at the same time, so that the hydrogen energy automobile naturally decelerates only through the driving resistance until the central control unit judges that the hydrogen energy automobile is not in a deceleration state;

s23: the central control unit detects the electric quantity state of the stage capacitor, and if the electric quantity of the super capacitor is greater than the highest limit value, the central control unit controls the fuel cell to reduce the output power and enables the super capacitor to supply power to the driving motor until the electric quantity of the super capacitor is lower than the highest limit value; if the electric quantity of the super capacitor is smaller than the lowest limit value, the central control unit controls the fuel cell to increase the output power, so that the fuel cell charges the super capacitor while supplying power to the driving motor until the electric quantity of the super capacitor reaches the optimal electric quantity value; and if the electric quantity of the super capacitor is between the lowest limit value and the lowest limit value, the central control unit controls the power supply system to be in the original state.

Further, the minimum limit value of the electric quantity of the super capacitor is a fixed value between 20% and 40% of the total capacity of the super capacitor, the maximum limit value of the electric quantity of the super capacitor is a fixed value between 85% and 98% of the total capacity of the super capacitor, and the optimal electric quantity value of the super capacitor is a fixed value between 55% and 65% of the total capacity of the super capacitor.

Further, in step S23, the central control unit keeps the total input power of the drive motors constant.

The power supply system of the fuel cell hydrogen energy automobile and the management method thereof have the advantages that the power supply system comprises the super capacitor, the super capacitor can assist the fuel cell to supply power when the hydrogen energy automobile accelerates, so that the instantaneous power of the hydrogen energy automobile is improved, the acceleration performance of the hydrogen energy automobile can be improved, the power supply system can convert the kinetic energy of the hydrogen energy automobile into electric energy when the hydrogen energy automobile decelerates, and the electric energy is recovered through the super capacitor, so that the energy utilization rate of the hydrogen energy automobile can be improved; by adopting the management method, the super capacitor in the power supply system can be in a proper electric quantity range for a long time, so that the super capacitor in the power supply system can be in a working state at any time in the running process of a hydrogen energy automobile.

Drawings

Fig. 1 is a connection structure diagram of a fuel cell hydrogen energy automobile power system.

In the figure: 1-a central control unit, 11-an acceleration and deceleration sensor, 2-a driving motor, 21-a driving motor control module, 3-a super capacitor, 31-a super capacitor control module, 4-a fuel cell and 41-a fuel cell control module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1, a fuel cell hydrogen energy automobile power supply system of the present invention includes a central control unit 1, a fuel cell 4, a super capacitor 3, a driving motor 2, and a fuel cell control module 41, a super capacitor control module 31, and a driving motor control module 21 for respectively controlling the fuel cell 4, the super capacitor 3, and the driving motor 2.

Wherein the fuel battery 4 and the driving motor 2 form a closed loop through a power conducting wire, the super capacitor 3 is also connected in the closed loop 3 through a power conducting wire, the super capacitor 3 is connected with the fuel battery 4 in parallel, the fuel battery 4 is used for supplying power to the driving motor 2 and charging the super capacitor 3, so that the driving motor can drive the hydrogen energy automobile to move, and the number of the driving motors 2 can be one or more, the super capacitor 3 is also called as an electrochemical capacitor and a double electric layer capacitor, the super capacitor can be charged and discharged rapidly, and the charging and discharging processes do not generate chemical reaction, so that the charging and discharging processes of the super capacitor 3 are reversible, and can be charged and discharged repeatedly for tens of thousands of times, the service life is long, the super capacitor 3 is used as an auxiliary power supply and an electric energy recovery device of the fuel battery 3 in the closed loop, namely when the hydrogen energy automobile needs to accelerate, the super capacitor 3 and the fuel cell 4 supply power to the driving motor 2 simultaneously to improve the instantaneous power of the driving motor 2 quickly, so that the hydrogen energy automobile can accelerate quickly, and when the hydrogen energy automobile needs to decelerate, the super capacitor 2 serves as an energy storage device to recover the electric energy generated when the driving motor decelerates 2.

Specifically, the fuel cell control module 41, the super capacitor control module 31 and the driving motor control module 21 are respectively connected with the fuel cell 4, the super capacitor 3 and the driving motor 2 through control wires, and the central control unit 1 is simultaneously connected with the fuel cell control module 41, the super capacitor control module 42 and the driving motor control module 41 through control wires, the power supply system of the invention further comprises an acceleration and deceleration sensor 11, the acceleration and deceleration sensor 11 is also connected with the central control unit 1 through control wires, the acceleration and deceleration sensor 11 is used for sensing the stroke states of an accelerator pedal and a brake pedal of a hydrogen energy automobile and transmitting signals of the stroke states to the central control unit 1, the central control unit 1 judges the acceleration and deceleration states required by the automobile according to the signals of the stroke states, and if the signals pass through the fuel cell control module 41, the super capacitor control module 31 and the driving motor control module 21 to control the fuel cell 4, the super capacitor 3 and the driving motor control module 21, The super capacitor 3 and the driving motor 2 are controlled in rotation state, so that acceleration and deceleration control and energy recovery of the hydrogen energy automobile are realized.

Further, an electric quantity detection unit is arranged in the super capacitor control module 31 and is used for detecting the electric quantity state of the super capacitor 3, so that the central control unit can acquire the electric quantity state information of the super capacitor 3 through the super capacitor control module 31.

The management method of the hydrogen energy automobile power supply system based on the fuel cell comprises the following steps:

s1, the acceleration and deceleration sensor 11 senses the travel state of the accelerator pedal and the brake pedal of the hydrogen energy automobile and transmits the sensed travel state signals to the central control unit 1;

s2: the central control unit 1 detects the signal transmitted by the acceleration and deceleration sensor 11 in real time, the central control unit 1 judges the acceleration and deceleration state required by the hydrogen energy automobile according to the detected travel state signal, if the hydrogen energy automobile needs to accelerate, the step S21 is executed, if the hydrogen energy automobile needs to decelerate, the step S22 is executed, and if the hydrogen energy automobile needs to keep the original speed, the step S23 is executed;

s21: the central control unit 1 detects the electric quantity state of the stage capacitor 3 through the super capacitor control module 31, if the electric quantity of the super capacitor is larger than the lowest limit value, the central control unit 1 controls the fuel cell 4 and the super capacitor 3 to simultaneously supply power to the driving motor 2, and the output power of the fuel cell 4 is increased, so that the hydrogen energy automobile is rapidly accelerated until the central control unit 1 judges that the hydrogen energy automobile is not in an acceleration state, and the hydrogen energy automobile reaches the speed required by a driver; if the electric quantity of the super capacitor is smaller than or equal to the lowest limit value, the central control unit only controls the fuel cell 4 to improve the output power, so that the hydrogen energy automobile is accelerated until the central control unit 1 judges that the hydrogen energy automobile is not in an acceleration state.

S22: the central control unit 1 detects the electric quantity state of the stage capacitor 3 through the super capacitor control module 31, if the electric quantity of the super capacitor is smaller than the maximum limit value, the central control unit 1 controls the fuel cell 4 to be disconnected from a closed circuit, the power supply to the driving motor 2 is stopped, so that the hydrogen energy automobile naturally decelerates through the driving resistance, meanwhile, the central control unit 1 controls the super capacitor 3 to be in an electric energy recovery state, at the moment, the driving motor 2 charges the super capacitor 3, the super capacitor 3 recovers the electric energy generated by the deceleration of the driving motor 2, the super capacitor 3 can increase the rotation resistance of the driving motor 2, the deceleration process of the hydrogen energy automobile is accelerated, and the central control unit 1 judges that the hydrogen energy automobile is not in the deceleration state; if the electric quantity of the super capacitor is larger than the maximum limit value, the central control unit 1 controls the fuel cell 4 and the super capacitor 3 to be disconnected from the closed circuit at the same time, so that the hydrogen energy automobile naturally decelerates only through the running resistance until the central control unit 1 judges that the hydrogen energy automobile is not in a deceleration state.

S23: the central control unit 1 detects the electric quantity state of the super capacitor 3 through the super capacitor control module 31, if the electric quantity of the super capacitor 3 is larger than the maximum limit value, the central control unit 1 controls the fuel cell 2 to reduce the output power and enables the super capacitor 3 to supply power to the driving motor until the electric quantity of the super capacitor 3 is lower than the maximum limit value; if the electric quantity of the super capacitor is smaller than the lowest limit value, the central control unit 1 controls the fuel cell 4 to increase the output power, so that the fuel cell 4 charges the super capacitor 3 while supplying power to the driving motor 2 until the electric quantity of the super capacitor reaches the optimal electric quantity value; if the electric quantity of the super capacitor is between the lowest limit value and the lowest limit value, the central control unit controls the power supply system to be in the original state, and in the whole process of step S23, the central control unit 1 keeps the total input power of the driving motor 2 unchanged, so that the hydrogen energy automobile keeps the original driving state.

In the above steps, the lowest limit value of the electric quantity of the super capacitor 3 is a fixed value between 20% and 40% of the total capacity of the super capacitor, the highest limit value of the electric quantity of the super capacitor 3 is a fixed value between 85% and 98% of the total capacity of the super capacitor, and the optimal electric quantity value of the super capacitor 3 is a fixed value between 55% and 65% of the total capacity of the super capacitor.

The power supply system of the fuel cell hydrogen energy automobile and the management method thereof have the advantages that the power supply system comprises the super capacitor 3, the super capacitor 3 can assist the fuel cell 2 to supply power when the hydrogen energy automobile accelerates, so that the instantaneous power of the hydrogen energy automobile is improved, the acceleration performance of the hydrogen energy automobile can be improved, the power supply system can convert the kinetic energy of the hydrogen energy automobile into electric energy when the hydrogen energy automobile decelerates, and the electric energy is recovered through the super capacitor 3, so that the energy utilization rate of the hydrogen energy automobile can be improved; by adopting the management method, the super capacitor 3 in the power supply system can be in a proper electric quantity range for a long time, so that the super capacitor 3 in the power supply system can be in a working state at any time in the running process of a hydrogen energy automobile.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.