阅读说明：本技术 燃料电池系统、车辆及燃料电池系统的控制方法 (Fuel cell system, vehicle, and control method for fuel cell system ) 是由 李鹏飞 唐子威 李智 于 2020-03-27 设计创作，主要内容包括：本发明公开了一种燃料电池系统、车辆及燃料电池系统的控制方法,根据本发明的燃料电池系统包括：燃料电池,燃料电池与负载相连；动力电池,动力电池与燃料电池和负载相连；电池功率检测模块；负载功率检测模块；控制器,控制器分别与电池功率检测模块、负载功率检测模块、燃料电池和动力电池电连接,在负载需求功率大于动力电池的最大放电功率时控制器控制燃料电池启动,且燃料电池的输出功率不小于预设功率。根据本发明的燃料电池系统设置有燃料电池、动力电池以及控制器,控制器可以根据负载需求功率来控制燃料电池和动力电池对负载供电,以降低燃料电池的启停频率,延长燃料电池的使用寿命。(The invention discloses a fuel cell system, a vehicle and a control method of the fuel cell system, the fuel cell system according to the invention comprises: a fuel cell connected to a load; the power battery is connected with the fuel cell and the load; a battery power detection module; a load power detection module; and the controller is electrically connected with the battery power detection module, the load power detection module, the fuel cell and the power cell respectively, controls the fuel cell to start when the load required power is greater than the maximum discharge power of the power cell, and the output power of the fuel cell is not less than the preset power. The fuel cell system is provided with the fuel cell, the power cell and the controller, and the controller can control the fuel cell and the power cell to supply power to the load according to the power required by the load, so that the starting and stopping frequency of the fuel cell is reduced, and the service life of the fuel cell is prolonged.)

1. A fuel cell system, characterized by comprising:

a fuel cell coupled to a load;

a power cell connected to the fuel cell and the load;

the battery power detection module is connected with the power battery and is suitable for detecting the maximum discharge power of the power battery;

the load power detection module is connected with the load and is suitable for detecting the power required by the load;

the controller is respectively electrically connected with the battery power detection module, the load power detection module, the fuel cell and the power cell, when the load required power is greater than the maximum discharge power of the power cell, the controller controls the fuel cell to start, and the output power of the fuel cell is not less than the preset power.

2. The fuel cell system according to claim 1, wherein the preset power is a power value at which the fuel cell operates at maximum efficiency.

3. The fuel cell system according to claim 1, wherein the controller controls the fuel cell to output the preset power when the load demand power is less than the preset power.

4. The fuel cell system according to claim 1, wherein the controller controls the fuel cell to output the load-required power when the load-required power is greater than the preset power.

5. A vehicle, characterized by comprising:

the fuel cell system of any one of claims 1 to 4;

the vehicle gear detection module is connected with the controller, and when the vehicle gear detection module detects that the vehicle is in a non-parking gear, the controller allows the fuel cell to be started.

6. A vehicle according to claim 5, characterized in that the vehicle is provided with a low power mode in which the fuel cell is not operated and the power cell supplies power to the load.

7. A vehicle according to claim 5, characterised in that the vehicle is provided with a medium to high power mode in which the fuel cell is charging the power cell while supplying power to the load.

8. A vehicle according to claim 5, characterised in that the vehicle is provided with a high power mode in which the fuel cell supplies power to the load simultaneously with the power cell.

9. A control method for a fuel cell system according to any one of claims 1 to 8, characterized by comprising:

s1: detecting whether the load required power is larger than the maximum discharge power of the power battery, if so, entering a step S2, otherwise, entering a step S3;

s2: the controller controls the fuel cell to start to supply power to the load;

s3: the controller controls the power battery to supply power to the load.

10. A control method for a fuel cell system, characterized in that said S2 includes:

s21: detecting whether the load required power is greater than the preset power, if so, entering a step S22, otherwise, entering a step S23;

s22: the controller controls the fuel cell to output the load demand power;

s23: the controller controls the fuel cell to output the preset power.

Technical Field

The present invention relates to the field of vehicles, and in particular, to a fuel cell system, a vehicle, and a control method of the fuel cell system.

Background

In the related art, in a vehicle using a fuel cell as an energy source, since the minimum stable power of a fuel cell stack is high, a fuel cell vehicle cannot be in an idle state for a long time. The fuel electric pile can break through the maximum limit value of the electric quantity of the power battery when running for a long time, and potential safety hazards are generated. And too much opening and shutting of fuel galvanic pile can influence the life-span of fuel galvanic pile, has also reduced the dynamic nature of car, influences the driving experience.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a fuel cell system, which is provided with a fuel cell, a power cell and a controller, wherein the controller can control the fuel cell and the power cell to supply power to a load according to a power demand of the load, so as to reduce the frequency of starting and stopping the fuel cell and prolong the service life of the fuel cell.

The invention also provides a vehicle with the fuel cell system.

The invention also provides a control method for the fuel cell system.

The fuel cell system according to the present invention includes: a fuel cell coupled to a load; a power cell connected to the fuel cell and the load; the battery power detection module is connected with the power battery and is suitable for detecting the maximum discharge power of the power battery; the load power detection module is connected with the load and is suitable for detecting the power required by the load; the controller is respectively electrically connected with the battery power detection module, the load power detection module, the fuel cell and the power cell, when the load required power is greater than the maximum discharge power of the power cell, the controller controls the fuel cell to start, and the output power of the fuel cell is not less than the preset power. According to one embodiment of the invention, the vehicle further comprises: the vehicle gear detection module is electrically connected with the controller and is suitable for detecting the current gear of the vehicle.

According to the fuel cell system of this application through setting up power battery, fuel cell and controller, the controller is according to the load demand power that load power detection module detected, control fuel cell through the biggest discharge power of comparison load demand power and power battery, with the starting condition as fuel cell, when power battery can't satisfy the load demand, fuel cell just can start, simultaneously for guaranteeing fuel cell's operation reliable and stable, fuel cell's output remains throughout more than presetting power, in order to improve fuel cell's stability of operation and fuel cell system's efficiency.

According to an embodiment of the invention, the preset power is a power value at which the fuel cell operates at maximum efficiency.

According to an embodiment of the present invention, the controller controls the fuel cell to output the preset power when the load demand power is less than the preset power.

According to an embodiment of the present invention, the controller controls the fuel cell to output the load demand power when the load demand power is greater than the preset power.

The vehicle according to the present invention is briefly described below.

The vehicle according to the present invention includes: the fuel cell system of the above embodiment; the vehicle gear detection module is connected with the controller, and when the vehicle gear detection module detects that the vehicle is in a non-parking gear, the controller allows the fuel cell to be started.

According to one embodiment of the invention, the vehicle is provided with a low power mode in which the fuel cell is not operated and the power cell supplies power to the load.

According to one embodiment of the invention, the vehicle is provided with a medium-high power mode in which the fuel cell supplies power to the load while charging the power cell.

According to one embodiment of the invention, the vehicle is provided with a high power mode in which the fuel cell supplies power to the load simultaneously with the power cell.

A control method for a fuel cell system according to the present invention, which is the fuel cell system in the above-described embodiment, is briefly described below, the control method including: s1: detecting whether the load required power is larger than the maximum discharge power of the power battery, if so, entering a step S2, otherwise, entering a step S3; s2: the controller controls the fuel cell to start to supply power to the load; s3: the controller controls the power battery to supply power to the load.

According to an embodiment of the present invention, the S2 includes: s21: detecting whether the load required power is greater than the preset power, if so, entering a step S22, otherwise, entering a step S23; s22: the controller controls the fuel cell to output the load demand power; s23: the controller controls the fuel cell to output the preset power. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a vehicle according to the present invention;

fig. 2 is a control method of a fuel cell for a vehicle according to the present invention.

Reference numerals:

the fuel cell system 100 is provided with a fuel cell system,

power cell 110, fuel cell 120, controller 130,

the system comprises a vehicle gear detection module 140, a load 150, a load power detection module 160 and a battery power detection module 170.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A fuel cell system 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 2.

The fuel cell system 100 according to the present invention includes a fuel cell 120, a power cell 110, a cell power detection module 170, a load power detection module 160, and a controller 130, wherein the fuel cell 120 is connected to a load 150, the power cell 110 is connected to the fuel cell 120 and the load 150, the cell power detection module 170 is connected to the power cell 110 and adapted to detect a maximum discharge power of the power cell 110, the load power detection module 160 is connected to the load 150 and adapted to detect a load demand power, the controller 130 is electrically connected to the cell power detection module 170, the load power detection module 160, the fuel cell 120, and the power cell 110, respectively, and the controller 130 controls the fuel cell 120 to start when the load demand power is greater than the maximum discharge power of the power cell 110, and an output power of the fuel cell 120 is not less than a preset power.

In the related art, since the minimum steady power of the fuel cell 120 is high, and the long-time operation of the fuel cell 120 may break through the maximum limit of the power cell 110, the service life of the fuel cell 120 may be affected by multiple start-stops of the fuel cell 120.

According to the fuel cell system 100 of the present application, the power cell 110, the fuel cell 120 and the controller 130 are provided, the controller 130 controls the fuel cell 120 by comparing the load demand power with the maximum discharge power of the power cell 110 according to the load demand power detected by the load power detection module 160, so as to serve as a starting condition of the fuel cell 120, when the power cell 110 cannot meet the demand of the load 150, the fuel cell 120 is started, and meanwhile, to ensure that the operation of the fuel cell 120 is stable and reliable, the output power of the fuel cell 120 is always kept above a preset power, so as to improve the operation stability of the fuel cell 120 and the efficiency of the fuel cell system.

According to the fuel cell system 100 of the present invention, the controller 130 uses the load demand power and the maximum discharge power of the power cell 110 as the conditions for starting the fuel cell 120, so as to reduce the number of times of starting and stopping the fuel cell 120, and meanwhile, the output range of the fuel cell 120 is set within a range not less than the preset power, so as to ensure stable and reliable operation of the fuel cell 120.

According to an embodiment of the present invention, the preset power is a power value when the fuel cell 120 operates at the maximum efficiency, the fuel cell 120 can only output the power value which is not less than the preset power, and the preset power is an output power when the fuel cell 120 operates at the maximum efficiency, the fuel cell 120 has a higher energy conversion efficiency, so that the fuel cell system 100 is more efficient, and the energy consumption of the fuel cell system 100 is reduced.

According to an embodiment of the present invention, when the load demand power is less than the preset power, the controller 130 controls the fuel cell 120 to output the preset power, after the fuel cell 120 is started, the load demand power is less than the preset power, the fuel cell 120 is kept at the preset power, a part of the power of the fuel cell 120 can be used to meet the power demand of the load 150, and another part of the power can be used to charge the power cell 110, so that the fuel cell 120 is kept at a higher operating efficiency, and at the same time, a part of the energy can be used to charge the power cell 110, thereby improving the economy of the fuel cell system 100 and avoiding energy waste.

According to an embodiment of the present invention, when the load demand power is greater than the preset power, the controller 130 controls the fuel cell 120 to output the load demand power, and the power output by the fuel cell 120 is used to meet the demand of the load 150, so as to ensure stable and reliable operation of the load 150.

In some embodiments, the load 150 may be a driving device in a vehicle, and during some conditions where the vehicle needs to accelerate or perform a large torque, the fuel cell 120 preferentially meets the requirement of the load 150, so as to ensure stable performance of the vehicle. A

The vehicle according to the present invention is briefly described below.

The vehicle according to the present invention includes the fuel cell system 100 of the above embodiment and a vehicle gear detection module, the vehicle gear detection module 140 is connected to the controller 130, and the controller 130 allows the fuel cell 120 to start when the vehicle gear detection module 140 detects that the vehicle is in the non-parking gear.

The vehicle gear detection module 140 may be configured to detect a current gear of the vehicle, where energy consumption of the entire vehicle is small and power required by the load 150 is smaller than a minimum output power of the fuel cell 120 under a working condition that the vehicle is in a parking gear, so that the fuel cell 120 does not need to be started at this time, the vehicle unit detection module 140 is configured on the vehicle to detect the current gear of the vehicle, whether the fuel cell 120 is started or not is controlled according to a gear condition of the vehicle, start-stop frequency of the fuel cell 120 is greatly reduced, so that the fuel cell 120 has a longer service life, and power performance of the vehicle is ensured.

According to an embodiment of the present invention, the vehicle further includes a vehicle gear detection module 140, the vehicle gear detection module 140 is electrically connected to the controller 130 and is adapted to detect a current gear of the vehicle, the vehicle may be provided with a forward gear, a reverse gear, an idle gear, and a parking gear, the vehicle gear detection module 140 may determine whether the gear of the vehicle is in a non-parking gear, and use the gear of the vehicle as one of conditions for whether the fuel cell 120 is activated, so as to ensure that the fuel cell 120 is not activated in the parking gear of the vehicle, thereby reducing the number of times of starting and stopping the fuel cell 120.

According to one embodiment of the present invention, the load 150 may be configured as a driving device electrically connected to the power battery 110 and the fuel battery 120, respectively, and adapted to provide power to the vehicle, and in some embodiments, the driving device may be a motor that may convert electric energy generated by the power battery 110 and the fuel battery 120 into mechanical energy to drive wheels of the vehicle to advance or reverse the vehicle.

The power demand of the driving device may be changed by controlling an accelerator pedal in the cab, the driver may step on the accelerator pedal to change the power demand of the driving device, the power battery 110 may supply power to the driving device in response to the power demand, and the controller 130 may compare the current power demand of the driving device with the maximum value of the output power of the power battery 110 to determine whether the fuel cell 120 needs to be started.

According to an embodiment of the present invention, the vehicle is provided with a low power mode, in which the fuel cell 120 is not operated and the power cell 110 supplies power to the load 150, and in the low power mode, the currently required power of the driving device of the vehicle is less than the maximum discharge power of the power cell 110, and the power cell 110 can meet the power requirement of the current mode of the vehicle, in which the fuel cell 120 is not started and the power cell 110 is used as the main energy source for driving the vehicle to move forward.

According to an embodiment of the present invention, the vehicle is provided with a medium-high power mode, in which the fuel cell 120 charges the power cell 110 while supplying power to the load 150, and in which the current required power of the driving device is greater than the maximum discharge power of the power cell 110, at which point the power cell 110 cannot meet the power requirement of the driving device, and in which the fuel cell 120 is started, and the fuel cell 120 supplies power to the driving device to meet the power requirement of the driving device; in order to ensure the high efficiency of the fuel cell 120, the fuel cell 120 outputs a predetermined power, in which the output power of the fuel cell 120 is generally greater than the required power of the driving device, the excess energy generated by the fuel cell 120 is stored in the power cell 110, and the fuel cell 120 charges the power cell 110 while meeting the power requirement of the driving device, so as to ensure that the fuel cell 120 operates at the most efficient efficiency value, improve the economy of the vehicle, and prolong the service life of the fuel cell 120.

In the medium-high power mode, when the required power of the driving device is greater than the high-efficiency output power of the fuel cell 120, the fuel cell 120 outputs the required power of the load to meet the power requirement of the driving device, and the output power of the fuel cell 120 is ensured to operate in the interval between the high-efficiency power and the limit power.

According to an embodiment of the present invention, the vehicle is provided with a high power mode, in the high power mode, the fuel cell 120 and the power cell 110 simultaneously supply power to the driving device, and in the high power mode, the power requirement of the driving device is greater than the upper limit of the output power of the fuel cell 120, at this time, the fuel cell 120 and the power cell 110 simultaneously supply power to the driving device, so as to meet the power requirement of the driving device, and the maximum torque and the maximum rotation speed of the vehicle can be increased, so that the vehicle has good escaping performance and acceleration capability, and the maximum speed of the vehicle is increased.

Since the vehicle according to the present invention is provided with the power battery 110, the fuel cell 120, the controller 130, and the like in the above embodiments, the vehicle according to the present invention can reduce the frequency of starting and stopping the fuel cell 120, which helps to prolong the service life of the fuel cell 120 and improve the economy of the vehicle.

The control method of the fuel cell system 100 according to the present invention is described below.

The control method of the fuel cell system 100 according to the present invention includes: s1: detecting whether the load required power is greater than the maximum discharge power of the power battery 110, if so, entering a step S2, otherwise, entering a step S3; s2: the controller 130 controls the fuel cell 120 to start up to supply power to the load 150; s3: the controller 130 controls the power battery 110 to supply power to the load 150.

According to the control method of the fuel cell 120 of the present invention, it is first determined whether the load demand power is greater than the maximum discharge power of the power cell 110, and the power cell 110 supplies power to the load 150 in the case where the power demand of the load 150 is less than the maximum discharge power of the power cell 110, using the above condition as one of the conditions for determining the start-up of the fuel cell 120.

According to an embodiment of the present invention, S2 includes: s21: detecting whether the load required power is greater than the preset power, if so, entering a step S22, otherwise, entering a step S23; s22: the controller 130 controls the fuel cell 120 to output the load demand power; s23: the controller 130 controls the fuel cell 120 to output the preset power.

In step S2, the output of the fuel cell 120 may be further set, and it is determined whether the load demand power is greater than the preset power, if the load demand power is greater than the preset power, the fuel cell 120 preferentially meets the demand of the load 150, and the fuel cell 120 outputs the load demand power; when the load demand power is less than the preset power, the fuel cell 120 outputs at the preset power to ensure that the fuel cell 120 outputs efficiently, thereby improving the economy of the fuel cell system 100.

According to the control method for the fuel cell system 100, the starting and stopping frequency of the fuel cell can be effectively reduced, the economy of the fuel cell is improved, and the service life of the fuel cell is prolonged.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.