Vehicle-mounted fuel cell hybrid power system and power supply method thereof

Abstract

The present invention provides a vehicle-mounted fuel cell hybrid power system, which includes at least one power supply unit and at least one control unit, wherein the control unit is configured to control the power supply of the power supply unit to the vehicle's electrical load, wherein the vehicle-mounted fuel cell hybrid power system of the present invention can improve its response to the power demand of the vehicle's electrical load and increase the fuel conversion rate.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell technology, and in particular to a vehicle-mounted fuel cell hybrid power system. The present invention further relates to a power supply method for a vehicle-mounted fuel cell hybrid power system. Background Art

[0002] A fuel cell is a power generation device that directly converts the chemical energy in a fuel into electrical energy through an electrochemical reaction. The electrical reaction process of a fuel cell does not involve combustion, so its energy conversion efficiency is not limited by the Carnot cycle, and it has the advantages of high efficiency and cleanliness. Secondly, the fuel cell has a short refueling time and does not require long-term charging like conventional electric vehicles, making it more convenient to use. In addition, fuel cells, especially proton membrane exchange fuel cells, use hydrogen as fuel. Hydrogen has a high energy density, and accordingly, fuel cells can provide the electricity required for a longer driving range. The above advantages of fuel cells determine that they have broad application prospects in the automotive industry.

[0003] Fuel cells, especially proton membrane exchange fuel cells, use hydrogen as fuel, and require an auxiliary power supply device to provide the power required for starting when starting. In addition, since fuel cells provide electricity through chemical reactions involving fuel. Therefore, fuel cells have a certain hysteresis when providing electricity to loads such as electric motors. Accordingly, when using fuel cells, especially when using a fuel cell hybrid power system consisting of a fuel cell and an auxiliary power supply device to power a vehicle, it is necessary to regulate the power supply of the fuel cell and the auxiliary power supply device in real time and in a timely manner, so as to prevent the vehicle-mounted fuel cell hybrid power system from failing to meet the vehicle's power supply needs, or the need to frequently adjust the output power of the fuel cell, thereby affecting the service life of the fuel cell.

[0004] The Chinese invention patent with application number CN 201410213491.8 (publication number: 103991389B) discloses a fuel cell hybrid bus energy management method. The fuel cell hybrid bus energy management method disclosed in the patent needs to detect the bus motor speed value, battery remaining power, bus voltage value, accelerator pedal position and pre-stored engine efficiency, etc., and only when the bus route is known (the vehicle speed is calculated according to the bus route) can the required power of the bus and the power distribution and output of the fuel cell hybrid system on the bus be obtained. In addition, the fuel cell hybrid bus energy management method disclosed in the patent does not consider the impact on the service life of the fuel cell when the fuel cell output power changes too frequently. However, the speed of the vehicle cannot remain constant during driving. Even for buses, the driving speed will change greatly during its driving. For example, when passengers get on and off the bus, avoid pedestrians and vehicles, start and stop, or even when the number of passengers on the bus changes, the bus output power will change greatly. Summary of the invention

[0005] The main advantage of the present invention is that it provides a vehicle-mounted fuel cell hybrid power system, wherein the vehicle-mounted fuel cell hybrid power system of the present invention can control the output power of the fuel cell power supply device of the vehicle-mounted fuel cell hybrid power system of the present invention according to the output power of the entire vehicle, so that the vehicle-mounted fuel cell hybrid power system of the present invention can adapt to and meet the power requirements under complex working conditions of the vehicle.

[0006] Another advantage of the present invention is that it provides a vehicle-mounted fuel cell hybrid power system, wherein the vehicle-mounted fuel cell hybrid power system of the present invention can control the output power of the fuel cell power supply device in real time according to the vehicle's power demand, so as to reduce the dynamic load of the fuel cell as much as possible and increase the service life of the fuel cell while meeting the vehicle's power demand.

[0007] Another advantage of the present invention is to provide a vehicle-mounted fuel cell hybrid power system, wherein the distribution of the output power of the vehicle-mounted fuel cell hybrid power system of the present invention does not rely on the detection of multiple parameters. Generally, when controlling the operation of complex equipment, considering the detection error and the reliability of the detection instrument, the more detection parameters, the greater the error. When distributing the output power of the fuel cell hybrid power system, the more parameters the power distribution is based on, the greater the basis for controlling the output power may deviate from the actual. The distribution of the vehicle-mounted fuel cell hybrid power system of the present invention only needs to detect a few parameters to minimize the error and improve the accuracy of the output power distribution.

[0008] Another advantage of the present invention is that it provides a vehicle-mounted fuel cell hybrid power system, wherein the vehicle-mounted fuel cell hybrid power system of the present invention has simple logic and small calculation amount for controlling the output power of its fuel cell power supply device, thereby making its control of the output power of the fuel cell power supply device more reliable.

[0009] Another advantage of the present invention is that it provides a vehicle-mounted fuel cell hybrid power system, wherein the auxiliary power supply device of the vehicle-mounted fuel cell hybrid power system of the present invention is a rechargeable power supply device, and the charging control module of the auxiliary power supply device can control the charging current of the fuel cell to charge the rechargeable battery of the auxiliary power supply device to not exceed its rated charging current, so as to prevent the rechargeable battery of the auxiliary power supply device from being overcharged.

[0010] Another advantage of the present invention is to provide a vehicle-mounted fuel cell hybrid power system, wherein the vehicle-mounted fuel cell hybrid power system of the present invention has a simple structure and high reliability.

[0011] Another advantage of the present invention is that it provides a method for powering a vehicle-mounted fuel cell hybrid power system, wherein the method for powering a vehicle-mounted fuel cell hybrid power system of the present invention can control the output power of the fuel cell power supply device in real time according to the real-time power demand of the vehicle, so as to reduce the dynamic load of the fuel cell and increase the service life of the fuel cell as much as possible while meeting the power demand of the vehicle.

[0012] In order to achieve at least one of the above-mentioned purposes of the present invention, the present invention provides a vehicle-mounted fuel cell hybrid power system, which comprises:

[0013] at least one power supply unit; and

[0014] At least one control unit, wherein the power supply unit includes at least one fuel cell power supply device and at least one auxiliary power supply device, the control unit includes a main controller, wherein the fuel cell power supply device and the auxiliary power supply device of the power supply unit are connected in parallel, and the main controller is electrically connected to the fuel cell power supply device and the auxiliary power supply device respectively, wherein the main controller is configured to be able to control the power supply unit according to the total output voltage U 总 , the total output current I of the power supply unit 总 and the charge state of the auxiliary power supply device to control the output power of the fuel cell power supply device of the power supply unit.

[0015] According to another aspect of the present invention, the present invention further provides a vehicle-mounted fuel cell hybrid power system, comprising:

[0016] at least one power supply unit; and

[0017] At least one control unit, wherein the power supply unit includes at least one fuel cell power supply device and at least one auxiliary power supply device, the control unit includes a main controller, wherein the fuel cell power supply device and the auxiliary power supply device of the power supply unit are connected in parallel, and the main controller is electrically connected to the fuel cell power supply device and the auxiliary power supply device respectively, wherein the main controller is configured to control the output power of the fuel cell power supply device according to the charge state of the auxiliary power supply device.

[0018] It can be understood that the output end of the power supply unit is suitable for being electrically connected to the input end of the vehicle's electrical load to transmit the electrical energy of the power supply unit to the vehicle's electrical load. In addition, the main controller is electrically connected to the fuel cell power supply device and the auxiliary power supply device, respectively, so that the main controller can communicate or transmit signals with the fuel cell power supply device and the auxiliary power supply device, and the charge value of the auxiliary power supply device can be sent to the main controller in the form of electronic data.

[0019] Further, the fuel cell power supply device includes at least one fuel cell and at least one first DC chopper, and the auxiliary power supply device includes a rechargeable battery, wherein the input end of the first DC chopper is electrically connected to the output end of the fuel cell to convert the DC power output by the fuel cell into a DC power having a voltage required by the vehicle-mounted fuel cell hybrid power system. It can be understood that the fuel cell power supply device and the auxiliary power supply device are connected in parallel, and the output end of the first DC chopper and the output end of the auxiliary power supply device form the output end of the power supply unit.

[0020] Furthermore, the vehicle-mounted fuel cell hybrid power system of the present invention includes an inverter, wherein the inverter is arranged between the power supply unit and the power load of the vehicle. In other words, the input end of the inverter is electrically connected to the output end of the power supply unit, and the output end of the inverter is electrically connected to the input end of the power load of the vehicle, so that the direct current output by the power supply unit is converted into corresponding alternating current by the inverter and then provided to the power load of the vehicle. Accordingly, the first DC chopper is arranged between the fuel cell of the fuel cell power supply device and the power load of the vehicle. It can be understood that the power load of the vehicle refers to the electrical equipment that provides power to the vehicle, such as an electric motor.

[0021] Furthermore, the vehicle-mounted fuel cell hybrid power system of the present invention includes a second DC chopper, wherein the second DC chopper is arranged between the power supply unit and the auxiliary power load of the vehicle. In other words, the input end of the second DC chopper is electrically connected to the output end of the power supply unit, and the output end of the second DC chopper is electrically connected to the input end of the auxiliary power load of the vehicle, so that the DC power output by the power supply unit is converted into corresponding DC power by the second DC chopper and then provided to the auxiliary power load 2 of the vehicle. Accordingly, the second DC chopper is arranged between the power supply unit and the auxiliary power load 2 of the vehicle. Preferably, the DC power output by the power supply unit has the voltage required by the auxiliary power load after being converted by the second DC chopper.

[0022] According to another aspect of the present invention, the present invention also provides a method for powering a vehicle-mounted fuel cell hybrid power system, which comprises the following steps:

[0023] (A) The total output voltage U of the power supply unit of the vehicle-mounted fuel cell hybrid system within the detection time T 总 and the total output current I 总 , and obtaining the state of charge of the auxiliary power supply device of the vehicle-mounted fuel cell hybrid power system; and

[0024] (B) According to the total output voltage U of the power supply unit of the vehicle-mounted fuel cell hybrid system 总 , total output current I 总 and the charge state of the auxiliary power supply device of the vehicle-mounted fuel cell hybrid power system, and controls the output power of the fuel cell power supply device of the power supply unit.

[0025] According to another aspect of the present invention, the present invention also provides a method for powering a vehicle-mounted fuel cell hybrid power system, which comprises the following steps:

[0026] (M) detecting a state of charge of an auxiliary power supply device of the vehicle-mounted fuel cell hybrid power system; and

[0027] (N) controlling the output power of the fuel cell power supply device of the vehicle-mounted fuel cell hybrid power system according to the charge state of the auxiliary power supply device.

[0028] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and the accompanying drawings.

[0029] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description, accompanying drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1Schematic diagram of the structure of a vehicle-mounted fuel cell hybrid power system according to an embodiment of the present invention.

[0031] Figure 2 is another structural schematic diagram of the vehicle-mounted fuel cell hybrid power system according to the above embodiment of the present invention.

[0032] Figure 3 is another structural schematic diagram of the vehicle-mounted fuel cell hybrid power system according to the above embodiment of the present invention.

[0033] Figure 4 Schematic diagram of the structure of a power supply unit of a vehicle-mounted fuel cell hybrid power system according to the above embodiment of the present invention.

[0034] Figure 5 Schematic diagram of the structure of a control unit of a vehicle-mounted fuel cell hybrid power system according to the above embodiment of the present invention.

[0035] Figure 6 The figure shows an optional implementation of the vehicle-mounted fuel cell hybrid power system according to the above embodiment of the present invention.

[0036] Figure 7 1 is a schematic structural diagram of an optional control unit of a vehicle-mounted fuel cell hybrid power system according to the above embodiment of the present invention.

[0037] Figure 8 is a flow chart of a method for powering a vehicle-mounted fuel cell hybrid power system according to the above embodiment of the present invention.

[0038] Fig. 9 is a flow chart of another vehicle-mounted fuel cell hybrid power system power supply method according to the above embodiment of the present invention. DETAILED DESCRIPTION

[0039] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The embodiments described below are only examples, and those skilled in the art may think of other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0040] Those skilled in the art should understand that, in the disclosure of the present invention, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0041] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0042] Referring to the accompanying drawings of the present invention Figures 1 to 5 , a vehicle-mounted fuel cell hybrid system according to a first embodiment of the present invention is explained, wherein the vehicle-mounted fuel cell hybrid system of the present invention includes at least one power supply unit 10 and at least one control unit 20 .

[0043] As shown in the attached picture Figures 1 to 5 As shown, the power supply unit 10 of the vehicle-mounted fuel cell hybrid power system according to the first embodiment of the present invention includes at least one fuel cell power supply device 11 and at least one auxiliary power supply device 12, and the control unit 20 includes a main controller 21, wherein the fuel cell power supply device 11 and the auxiliary power supply device 12 of the power supply unit 10 are connected in parallel, and the main controller 21 is electrically connected to the fuel cell power supply device 11 and the auxiliary power supply device 12 respectively. It can be understood that the fuel cell power supply device 11 is the main power supply device of the power supply unit 10, and the auxiliary power supply device 12 is a rechargeable battery power supply device. Preferably, the auxiliary power supply device 12 is a lithium battery power supply device. The main controller 21 of the control unit 20 of the vehicle-mounted fuel cell hybrid power system of the present invention is configured to be able to be based on the following formula: P = (S 设 -S 当 )*KP+P T , where KP = {a*(S 设 -S 当 ) 2 +b*(S 设 -S 当 )+c}*P 额 Control the output power P of the fuel cell power supply device 11 of the power supply unit 10, where P T is the average output power of the power supply unit 10 within the time T, S 设 is the set charge value of the auxiliary power supply device 12, S 当is the current charge value of the auxiliary power supply device 12, P 额 is the rated power of the fuel cell power supply device 11. Accordingly, the main controller 21 of the control unit 20 can adjust and control the output power of the fuel cell power supply device 11 of the power supply unit 10 of the vehicle-mounted fuel cell hybrid system of the present invention in real time according to the power P. Preferably, within the time T, the average output power P of the power supply unit 10 is T The formula P T =∑(U 总 *I 总 ) / T is calculated, where U 总 The total output voltage of the power supply unit 10, I 总 is the total output current of the power supply unit 10. The set charge value S of the auxiliary power supply device 12 设 Provided by the manufacturer, it is generally 70% to 80% (or 0.7 to 0.8) of the rated power of the auxiliary power supply device 12. Preferably, according to the repeated verification of the inventor of the patent application of the present invention, in the above formula, when 4.0≤a≤5.0, 0.15≤b≤0.30, 0.20≤c≤0.10, especially when 3.48≤a≤4.82, 0.20≤b≤0.25, 0.15≤c≤0.08, the dynamic load of the fuel cell power supply device 11 of the power supply unit 10 of the vehicle-mounted fuel cell hybrid power system of the present invention can be better controlled, and the output power of the power supply unit 10 of the vehicle-mounted fuel cell hybrid power system of the present invention can meet the needs of the vehicle. More preferably, in the above formula, b=0.2172, 0.1487≤c≤0.06592. In addition, when in the above formula, if the calculated KP>P 额， Then let KP=P 额 , if the calculated P>P 额， The output power of the fuel cell power supply device 11 should be controlled to be P=P 额 Those skilled in the art will appreciate that the total output voltage U of the power supply unit 10 总 The total output current I of the power supply unit 10 can be detected by a voltage sensor 23. 总 The state of charge (or charge value) of the auxiliary power supply device 12 can be detected by a first current sensor 24, and the state of charge (or charge value) can be detected by a state of charge acquisition module 22. Preferably, the voltage sensor 23 and the first current sensor 24 are integrated in the power supply unit 10, and the state of charge acquisition module 22 is integrated in the auxiliary power supply device 12. Optionally, the voltage sensor 23, the first current sensor 24 and the state of charge acquisition module 22 are configured as independent components. Accordingly, the total output voltage U of the power supply unit 10 detected by the voltage sensor 23 is 总, the total output current I of the power supply unit 10 detected by the first current sensor 24 总 The charge state of the auxiliary power supply device 12 detected by the charge state acquisition module 22 can be transmitted to the main controller 21, so that the main controller 21 can detect the total output voltage U of the power supply unit 10 according to the total output voltage U of the power supply unit 10. 总 , the total output current I of the power supply unit 10 总 and the charging state of the auxiliary power supply device 12, and adjusts the output power of the fuel cell power supply device 11 of the power supply unit 10 of the vehicle-mounted fuel cell hybrid power system of the present invention in real time.

[0044] It is worth noting that the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention is the main power supply device. Therefore, in addition to being affected by the power P required by the vehicle, the output power of the fuel cell power supply device 11 is also restricted by the fuel supply of the fuel cell power supply device 11, such as hydrogen supply, and the oxidant supply, such as oxygen or other oxidant supply. In other words, the response of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention to the load power consumption may not be immediate. Especially when only the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention supplies power to the power load, and the maximum output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention is not greater than the power P required by the vehicle. At the same time, when the power P required by the vehicle is much lower than the maximum output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention, the fuel and oxidant supply of the fuel cell power supply device 11 may be empty and wasted. However, if the output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention is adjusted too frequently according to the power P required by the vehicle, it is possible that the stability and power generation performance of the fuel cell power supply device 11 will be affected, and the service life of the fuel cell power supply device 11 will be reduced. Therefore, in order to avoid frequent adjustment of the output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention, reduce the dynamic load of the fuel cell of the fuel cell power supply device 11, and ensure the rapid and accurate response of the output power of the vehicle-mounted fuel cell hybrid system of the present invention, the main controller 21 of the control unit 20 of the vehicle-mounted fuel cell hybrid system of the present invention is configured to be able to calculate the power P that the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention should provide according to the above formula: P = (S 设 -S 当 )*KP+PT, real-time adjustment and control of the fuel supply and oxidant supply of the fuel cell power supply device 11 of the power supply unit 10 of the vehicle-mounted fuel cell hybrid system of the present invention, thereby controlling the output power P of the fuel cell power supply device 11 输It has a suitable value to keep the output power of the fuel cell power supply device 11 stable as much as possible and reduce the dynamic load of the fuel cell power supply device 11. Accordingly, the frequent adjustment of the output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid power system of the present invention is avoided, and the power safety of the vehicle-mounted fuel cell hybrid power system of the present invention and the instant response of the vehicle-mounted fuel cell hybrid power system of the present invention to the vehicle power load can be ensured.

[0045] As shown in the attached picture Figures 1 to 5 As shown, the fuel cell power supply device 11 of the power supply unit 10 of the vehicle-mounted fuel cell hybrid power system according to the first embodiment of the present invention includes at least one fuel cell 111 and at least one first DC chopper 31, wherein the input end of the first DC chopper 31 is electrically connected to the output end of the fuel cell 111 to convert the DC power output by the fuel cell 111 into a DC power having the voltage required by the vehicle-mounted fuel cell hybrid power system of the present invention. It can be understood that the fuel cell power supply device 11 and the auxiliary power supply device 12 are connected in parallel, and the output end of the first DC chopper 31 and the output end of the auxiliary power supply device 12 form the output end of the power supply unit 10. Preferably, the auxiliary power supply device 12 includes a rechargeable battery.

[0046] As shown in the attached picture Figures 1 to 5 As shown, the vehicle-mounted fuel cell hybrid power system according to the first embodiment of the present invention further includes an inverter 40, wherein the inverter 40 is arranged between the power supply unit 10 and the power load 1 of the vehicle. In other words, the input end of the inverter 40 is electrically connected to the output end of the power supply unit 10, and the output end of the inverter 40 is electrically connected to the input end of the power load 1 of the vehicle, so that the direct current output by the power supply unit is converted into corresponding alternating current by the inverter, and then provided to the power load 1 of the vehicle, such as a motor, and the power load 1 then drives the vehicle to travel through the vehicle's transmission system 3. Correspondingly, the first DC chopper 31 is arranged between the fuel cell 111 of the fuel cell power supply device 11 and the power load 1 of the vehicle. It can be understood that the power load 1 of the vehicle refers to an electrical device that provides power to the vehicle, such as an electric motor.

[0047] As shown in the attached picture Figures 1 to 5As shown, the vehicle-mounted fuel cell hybrid power system according to the first embodiment of the present invention further includes at least one second DC chopper 32, wherein the second DC chopper 32 is arranged between the power supply unit 10 and the auxiliary electrical load 2 of the vehicle. In other words, the input end of the second DC chopper 32 is electrically connected to the output end of the power supply unit 10, and the output end of the second DC chopper 32 is electrically connected to the input end of the auxiliary electrical load 2 of the vehicle, so that the DC power output by the power supply unit 10 is converted into corresponding DC power by the second DC chopper 32 and then provided to the auxiliary electrical load 2 of the vehicle. Preferably, the DC power output by the power supply unit 10 has the voltage required by the auxiliary electrical load 2 of the vehicle after being converted by the second DC chopper 32. It can be understood that the auxiliary electrical load 2 of the vehicle refers to the auxiliary mechanism of the vehicle, such as a car radio, a player, etc.

[0048] As shown in the attached picture Figures 1 to 5 As shown, the control unit 20 of the vehicle-mounted fuel cell hybrid power system according to the first embodiment of the present invention further includes an auxiliary current sensor 25 electrically connected to the main controller 21, wherein the auxiliary current sensor 25 is arranged at the input end of the auxiliary power supply device 12 to detect the charging current of the auxiliary power supply device 12. Accordingly, the auxiliary power supply device 12 is a chargeable and dischargeable storage device. Preferably, the auxiliary power supply device 12 is a lithium battery power supply device. It can be understood that when the charging current of the auxiliary power supply device 12 detected by the auxiliary current sensor 25 is too large, the main controller 21 generates a warning signal.

[0049] As shown in the attached picture Figures 1 to 5 As shown, the control unit 20 of the vehicle-mounted fuel cell hybrid system according to the first embodiment of the present invention further includes a charging control module 26, wherein the charging control module 26 is configured to control the charging current I of the auxiliary power supply device 12. 充 Not greater than the maximum charging current I of the auxiliary power supply device 12 Max To prevent the auxiliary power supply device 12 from being overcharged and thus affecting the performance and service life of the auxiliary power supply device 12 . Accordingly, the charging control module 26 is disposed at the input end of the auxiliary power supply device 12 .

[0050] As shown in the attached picture Figures 1 to 5As shown, the vehicle-mounted fuel cell hybrid system according to the first embodiment of the present invention further includes a fuel supply device 50 and an oxidant supply device 60, wherein the fuel supply device 50 is configured to supply fuel to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention, and the oxidant supply device 60 is configured to supply oxidant to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention. For example, when the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention is a hydrogen fuel cell, the fuel supply device 50 is configured to supply hydrogen to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention, and the oxidant supply device 60 is configured to supply oxygen (or air) to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention. It can be understood that the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention may also be other types of fuel cells, such as a methanol fuel cell.

[0051] As shown in the attached picture Figures 1 to 5 As shown, the control unit 20 of the vehicle-mounted fuel cell hybrid system according to the first embodiment of the present invention further includes a fuel supply control module 27 electrically connected to the main controller 21 and an oxidant supply control module 28 electrically connected to the main controller 21, wherein the fuel supply control module 27 is configured to control the fuel supply device 50 to supply fuel to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention according to a fuel supply instruction, and the oxidant supply control module 28 is configured to control the oxidant supply device 60 to supply oxidant to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention according to an oxidant supply instruction. Accordingly, the main controller 21 of the control unit 20 of the vehicle-mounted fuel cell hybrid system of the present invention is configured to generate the fuel supply instruction and the oxidant supply instruction according to the required power P of the vehicle, so that the fuel supply control module 27 can control the fuel supply device 50 to supply fuel to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention and the oxidant supply control module 28 can control the oxidant supply device 60 to supply oxidant to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention. Accordingly, the fuel supply control module 27 and the oxidant supply control module 28 can also be regarded as structural parts of the fuel supply device 50. Preferably, the fuel supply control module 27 and the oxidant supply control module 28 are integrated in the fuel supply device 50.

[0052] As shown in the attached picture Figures 1 to 5 As shown, the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system according to the first embodiment of the present invention further includes a cooling device 70, wherein the cooling device 70 is arranged on the fuel cell 111 of the fuel cell power supply device 11 to cool the fuel cell 111 of the fuel cell power supply device 11.

[0053] As shown in the attached picture Figures 1 to 5 As shown, according to the first embodiment of the present invention, the present invention further provides a power supply component for a vehicle-mounted fuel cell hybrid system, which includes at least one power supply unit 10, wherein the power supply unit 10 includes at least one fuel cell power supply device 11 and at least one auxiliary power supply device 12, wherein the fuel cell power supply device 11 and the auxiliary power supply device 12 of the power supply unit 10 are connected in parallel.

[0054] As shown in the attached picture Figures 1 to 5 As shown, according to the first embodiment of the present invention, the power supply component for the vehicle-mounted fuel cell hybrid power system of the present invention further includes at least one first DC chopper 31, the fuel cell power supply device 11 includes at least one fuel cell 111, wherein the input end of the first DC chopper 31 is electrically connected to the output end of the fuel cell 111. Further, the power supply component for the vehicle-mounted fuel cell hybrid power system of the present invention includes a second DC chopper 32, an inverter 40, an auxiliary current sensor 25, a fuel supply device 50, an oxidant supply device 60 and / or a cooling device 70.

[0055] As shown in the attached picture Figure 8 As shown, according to the first embodiment of the present invention, the present invention further provides a method for powering a vehicle-mounted fuel cell hybrid power system, which comprises the following steps:

[0056] (A) The total output voltage U of the power supply unit of the vehicle-mounted fuel cell hybrid system within the detection time T 总 and the total output current I 总， and detecting a state of charge of an auxiliary power supply device of the vehicle-mounted fuel cell hybrid power system; and

[0057] (B) According to the total output voltage U of the power supply unit of the vehicle-mounted fuel cell hybrid system 总 , total output current I 总 and the charge state of the auxiliary power supply device of the vehicle-mounted fuel cell hybrid power system to control the output power of the power supply unit.

[0058] According to the first embodiment of the present invention, further, the vehicle-mounted fuel cell hybrid power system power supply method of the present invention comprises the following steps:

[0059] (C) Controlling the charging current I of the auxiliary power supply device through a charging control module 充 Not greater than the maximum charging current I of the auxiliary power supply device Max .

[0060] Referring to the accompanying drawings of the present invention Figure 6 to Figure 7 , a vehicle-mounted fuel cell hybrid system according to a second embodiment of the present invention is explained, wherein the vehicle-mounted fuel cell hybrid system according to the second embodiment of the present invention includes at least one power supply unit 10 and at least one control unit 20A.

[0061] As shown in the attached picture Figure 6 to Figure 7 As shown, the power supply unit 10 of the vehicle-mounted fuel cell hybrid power system according to the second embodiment of the present invention includes at least one fuel cell power supply device 11 and at least one auxiliary power supply device 12, wherein the control unit 20A includes a main controller 21A, wherein the fuel cell power supply device 11 and the auxiliary power supply device 12 of the power supply unit 10 are connected in parallel, and the main controller 21A is electrically connected to the fuel cell power supply device 11 and the auxiliary power supply device 12 respectively, wherein the main controller 21A is configured to control the output power of the fuel cell power supply device 11 according to the charge state of the auxiliary power supply device 12. Further, the main controller 21A is configured to control the increase of the output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid power system of the present invention when the charge value of the auxiliary power supply device 12 is lower than a first preset charge value. Further, the main controller 21A is configured to control the reduction of the output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid power system of the present invention when the charge value of the auxiliary power supply device 12 is higher than a second preset charge value. Further, the main controller 21A is configured to control the output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention to be the optimal output power when the charge value of the auxiliary power supply device 12 is between the first preset charge value and the second preset charge value. It can be understood that the optimal output power of the fuel cell power supply device 11 in this article refers to the output power that can more fully convert the fuel into electrical energy under the current fuel supply and oxidant supply conditions. It can be understood that the first preset charge value is lower than the second preset charge value. Those skilled in the art can understand that the charge value of the auxiliary power supply device 12 can be detected by a charge state acquisition module 22. Preferably, the charge state acquisition module 22 is integrated in the auxiliary power supply device 12. Optionally, the charge state acquisition module 22 is a separate element or component. Accordingly, the charge state information of the auxiliary power supply device 12 is directly provided to the main controller 21 through the auxiliary power supply device 12.

[0062] It is worth noting that, since the fuel cell power supply device 11 and the auxiliary power supply device 12 are connected in parallel, if the power of the auxiliary power supply device 12 is too low, it means that the auxiliary power supply device 12 is excessively involved in the power supply of the vehicle. Accordingly, the main controller 21A of the control unit 20A of the vehicle-mounted fuel cell hybrid system of the second embodiment of the present invention should control the increase of the output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention according to the charge value of the auxiliary power supply device 12, so as to meet the increased power demand of the vehicle in an emergency as much as possible and ensure the normal driving and effective control of the vehicle, so that the vehicle can operate or drive normally in various complex situations. For example, when the vehicle is in an emergency state, the power demand may increase significantly in a short period of time. However, due to the fuel supply and oxidant supply levels of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention, its current maximum output power is difficult to respond effectively to the sudden increase in power immediately, and the auxiliary power supply of the auxiliary power supply device 12 is required. At this time, if the charge value of the auxiliary power supply device 12 is too low, the auxiliary power supply device 12 will also be unable to meet the sudden increase in power demand of the vehicle, resulting in the vehicle being unable to drive normally and / or being difficult to be effectively controlled. Therefore, when the charge value of the auxiliary power supply device 12 is too low, for example, lower than a first preset charge value, in order to ensure the power consumption of the vehicle, the main controller 21 of the vehicle-mounted fuel cell hybrid system of the present invention should control to increase the output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention, so as to ensure that the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention can meet the sudden increase in power demand of the vehicle and charge the auxiliary power supply device 12 in time. In other words, at this time, the main controller 21 should control to increase the fuel supply and oxidant supply to the fuel cell power supply device 11, thereby improving the power supply capacity of the fuel cell power supply device 11. At the same time, since the charge value of the auxiliary power supply device 12 is too low, correspondingly, even if the power consumption of the vehicle is reduced, the auxiliary power supply device 12 can be charged by the fuel cell power supply device 11. On the other hand, if the power of the auxiliary power supply device 12 is too high, it means that the auxiliary power supply device 12 is less involved in the power supply of the vehicle. In addition, since the power of the auxiliary power supply device 12 is relatively high, it means that even if the power demand of the vehicle suddenly increases, it can also be met by the auxiliary power supply device 12. Accordingly, at this time, the main controller 21A of the control unit 20A of the vehicle-mounted fuel cell hybrid system according to the second embodiment of the present invention should control the reduction of the output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention according to the state of charge of the auxiliary power supply device 12, so as to minimize the idle consumption of fuel and oxidant and improve the conversion rate of fuel.On the other hand, when the charge value of the auxiliary power supply device 12 is between the first preset charge value and the second preset charge value, the power demand of the vehicle is stably supplied by the fuel cell power supply device 11 and the auxiliary power supply device 12, and the main controller 21A of the control unit 20A should control the output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid power system of the present invention to be within its optimal output power range. It can be understood that the optimal output power range of the fuel cell power supply device 11 means that when the fuel cell power supply device 11 supplies power with this output power, its fuel conversion efficiency is higher and its operation is more stable, and this output power of the fuel cell power supply device 11 is the optimal output power range of the fuel cell power supply device 11.

[0063] As shown in the attached picture Figure 6 to Figure 7 As shown, the vehicle-mounted fuel cell hybrid system according to the second embodiment of the present invention further includes a fuel supply device 50 and an oxidant supply device 60, wherein the fuel supply device 50 is configured to supply fuel to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention, and the oxidant supply device 60 is configured to supply oxidant to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention. For example, when the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention is a hydrogen fuel cell, the fuel supply device 50 is configured to supply hydrogen to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention, and the oxidant supply device 60 is configured to supply oxygen (or air) to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention. It can be understood that the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention may also be other types of fuel cells, such as a methanol fuel cell.

[0064] As shown in the attached picture Figure 6 to Figure 7As shown, the control unit 20A of the vehicle-mounted fuel cell hybrid system according to the second embodiment of the present invention further includes a fuel supply control module 27 electrically connected to the main controller 21A and an oxidant supply control module 28 electrically connected to the main controller 21A, wherein the fuel supply control module 27 is configured to control the fuel supply device 50 to supply fuel to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention according to a fuel supply instruction, and the oxidant supply control module 28 is configured to control the oxidant supply device 60 to supply oxidant to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention according to an oxidant supply instruction. Accordingly, the main controller 21A of the control unit 20 of the vehicle-mounted fuel cell hybrid system of the present invention is configured to generate the fuel supply instruction and the oxidant supply instruction according to the state of charge of the auxiliary power supply device 12, so that the fuel supply control module 27 can control the fuel supply device 50 to supply fuel to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention and the oxidant supply control module 28 can control the oxidant supply device 60 to supply oxidant to the fuel cell 111 of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention, thereby increasing or decreasing the maximum output power of the fuel cell power supply device 11 of the vehicle-mounted fuel cell hybrid system of the present invention. It can be understood that the auxiliary current sensor 25A, the charging control module 26, the fuel supply control module 27 and / or the oxidant supply control module 28 are all equipped with a clock, and the clock times of the main controller 21, the state of charge acquisition module 22, the auxiliary current sensor 25A, the charging control module 26, the fuel supply control module 27 and the oxidant supply control module 28 are set to be synchronized.

[0065] As shown in the attached picture Fig. 9 As shown, according to the second embodiment of the present invention, the present invention further provides a method for powering a vehicle-mounted fuel cell hybrid power system, which comprises the following steps:

[0066] (M) detecting a state of charge of an auxiliary power supply device of the vehicle-mounted fuel cell hybrid power system; and

[0067] (N) controlling the output power of the fuel cell power supply device of the vehicle-mounted fuel cell hybrid power system according to the charge state of the auxiliary power supply device.

[0068] According to the second embodiment of the present invention, the vehicle-mounted fuel cell hybrid power system power supply method of the present invention further comprises the following steps:

[0069] (P) A charging control module is used to control the charging current I of the auxiliary power supply device.充 Not greater than the maximum charging current I of the auxiliary power supply device Max .

[0070] Those skilled in the art will appreciate that the embodiments of the present invention shown in the drawings and described above are merely illustrative rather than limiting.

[0071] It can be seen that the purpose of the present invention can be fully and effectively accomplished. This embodiment for explaining the function and structural principle of the present invention has been fully illustrated and described, and the present invention is not limited by the changes based on the principle of these embodiments. Therefore, the present invention includes all modifications within the scope and spirit of the appended claims.

Claims

1. A vehicle-mounted fuel cell hybrid power system, characterized in that: include: at least one power supply unit; and At least one control unit, wherein the power supply unit includes at least one fuel cell power supply device and at least one auxiliary power supply device, the control unit includes a main controller, wherein the fuel cell power supply device and the auxiliary power supply device of the power supply unit are connected in parallel, and the main controller is electrically connected to the fuel cell power supply device and the auxiliary power supply device respectively, wherein the main controller of the power supply unit is configured to be able to generate a voltage according to the total output voltage U of the power supply unit 总 , the total output current I of the power supply unit 总 and the charge state of the auxiliary power supply device, obtain the power P that the fuel cell power supply device should provide, and control the output power of the fuel cell power supply device of the power supply unit according to the power P, wherein, P=(S 设 -S 当 )*KP+P T , if the calculated P>P 额 , then let P = P 额 ; P T =Σ(U 总 *I 总 ) / T; KP={a*(S 设 -S 当 ) 2 +b*(S 设 -S 当 )+c}*P 额 , if the calculated KP>P 额 , then let KP=P 额 ; S 设 is the set charge value of the auxiliary power supply device, S 当 is the current charge value of the auxiliary power supply device, P 额 is the rated power of the fuel cell power supply device, T is the set time, and a, b, and c are all set parameters.

2. The vehicle-mounted fuel cell hybrid power system according to claim 1, characterized in that: The fuel cell power supply device includes at least one fuel cell and at least one first DC chopper, wherein the input end of the first DC chopper is electrically connected to the output end of the fuel cell to convert the DC power output by the fuel cell into DC power with the voltage required by the vehicle-mounted fuel cell hybrid power system.

3. The vehicle-mounted fuel cell hybrid power system according to claim 1, characterized in that: It further includes an inverter, wherein the input end of the inverter is electrically connected to the output end of the power supply unit, and the output end of the inverter is electrically connected to the input end of the power load of the vehicle, so as to convert the direct current output by the power supply unit into corresponding alternating current and provide it to the power load of the vehicle.

4. The vehicle-mounted fuel cell hybrid power system according to claim 2, characterized in that: It further includes an inverter, wherein the input end of the inverter is electrically connected to the output end of the power supply unit, and the output end of the inverter is electrically connected to the input end of the power load of the vehicle, so as to convert the direct current output by the power supply unit into corresponding alternating current and provide it to the power load of the vehicle.

5. The vehicle-mounted fuel cell hybrid power system according to claim 2, characterized in that: It further includes at least one second DC chopper, wherein the input end of the second DC chopper is electrically connected to the output end of the power supply unit, and the output end of the second DC chopper is electrically connected to the input end of the auxiliary electrical load of the vehicle, so as to convert the DC power output by the power supply unit into DC power with the voltage required by the auxiliary electrical load of the vehicle.

6. The vehicle-mounted fuel cell hybrid power system according to claim 3, characterized in that: It further includes at least one second DC chopper, wherein the input end of the second DC chopper is electrically connected to the output end of the power supply unit, and the output end of the second DC chopper is electrically connected to the input end of the auxiliary electrical load of the vehicle, so as to convert the DC power output by the power supply unit into DC power with the voltage required by the auxiliary electrical load of the vehicle.

7. The vehicle-mounted fuel cell hybrid power system according to claim 1, characterized in that: The control unit further includes a charging control module electrically connected to the main controller, wherein the charging control module is configured to control the charging current I of the auxiliary power supply device. 充 Not greater than the maximum charging current I of the auxiliary power supply device Max .

8. The vehicle-mounted fuel cell hybrid power system according to claim 7, characterized in that: The control unit further includes an auxiliary current sensor electrically connected to the main controller, wherein the auxiliary current sensor is arranged at the input end of the auxiliary power supply device to detect the charging current of the auxiliary power supply device.

9. The vehicle-mounted fuel cell hybrid power system according to claim 1, characterized in that: It further includes a fuel supply device and an oxidant supply device, wherein the fuel supply device is configured to supply fuel to the fuel cell of the fuel cell power supply device, and the oxidant supply device is configured to supply oxidant to the fuel cell of the fuel cell power supply device.

10. The vehicle-mounted fuel cell hybrid power system according to claim 9, characterized in that: The control unit further includes a fuel supply control module electrically connected to the main controller and an oxidant supply control module electrically connected to the main controller, wherein the fuel supply control module is configured to control the fuel supply device to supply fuel to the fuel cell of the fuel cell power supply device according to a fuel supply instruction, and the oxidant supply control module is configured to control the oxidant supply device to supply oxidant to the fuel cell of the fuel cell power supply device according to an oxidant supply instruction.

11. A method for powering a vehicle-mounted fuel cell hybrid power system, characterized in that: The following steps are involved: (A) The total output voltage U of the power supply unit of the vehicle-mounted fuel cell hybrid system within the detection time T 总 , total output current I 总 , and obtaining the state of charge of the auxiliary power supply device of the vehicle-mounted fuel cell hybrid power system; and (B) According to the total output voltage U of the power supply unit of the vehicle-mounted fuel cell hybrid system 总 , total output current I 总 and the charge state of the auxiliary power supply device of the vehicle-mounted fuel cell hybrid system, obtain the power P that the fuel cell power supply device of the power supply unit should provide, and control the output power of the fuel cell power supply device of the power supply unit according to the power P, wherein, P=(S 设 -S 当 )*KP+P T , if the calculated P>P 额 , then let P = P 额 ; P T =Σ(U 总 *I 总 ) / T; KP={a*(S 设 -S 当 ) 2 +b*(S 设 -S 当 )+c}*P 额 , if the calculated KP>P 额 , then let KP=P 额 ; S 设 is the set charge value of the auxiliary power supply device, S 当 is the current charge value of the auxiliary power supply device, P 额 is the rated power of the fuel cell power supply device, T is the set time, and a, b, and c are all set parameters.

12. The method for powering a vehicle-mounted fuel cell hybrid power system according to claim 11, characterized in that: The step (B) further comprises the following steps: The output power of the power supply unit is controlled by a DC chopper, wherein the output power of the power supply unit is within the rated output power range of the DC chopper.

13. The method for powering a vehicle-mounted fuel cell hybrid power system according to claim 11, characterized in that: Further comprising the steps of: (C) Controlling the charging current I of the auxiliary power supply device through a charging control module 充 Not greater than the maximum charging current I of the auxiliary power supply device Max .

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