A vehicle drive system with hydrogen energy hybrid

Abstract

The present invention discloses a vehicle drive system with hydrogen energy hybrid. It includes: a controller, a hydrogen fuel engine module and a hydrogen fuel cell module connected to the controller; the controller is used to obtain start-up information, judge whether the start-up information meets the preset conditions, if it meets, generate an engine operation instruction and send the engine operation instruction to the hydrogen fuel engine module, otherwise, generate a fuel cell operation instruction and send the fuel cell operation instruction to the hydrogen fuel cell module; the hydrogen fuel engine module is used to receive the engine operation instruction and drive the vehicle according to the engine operation instruction; the hydrogen fuel cell module is used to receive the fuel cell operation instruction and drive the vehicle according to the fuel cell operation instruction. By obtaining the start-up information and operating the hydrogen fuel engine module under the preset conditions that are not suitable for the operation of the hydrogen fuel cell module, the impact durability of the stack is increased, and the advantages of both are combined to improve the drive efficiency, thereby reducing the cost.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen power, and particularly to a vehicle drive system for hydrogen energy hybrid Background Art

[0002] With the continuous increase of the global greenhouse effect, the development of new energy that can replace fossil fuels is extremely crucial. Hydrogen energy is called the ultimate energy in the 21st century, and there are no pollutant emissions in the chemical energy conversion process it participates in.

[0003] The existing technologies either use hydrogen fuel cells or hydrogen fuel cell engines as hydrogen energy power. When using hydrogen fuel cells to achieve high-speed driving, there will be insufficient impact durability of the fuel cell stack, which increases the cost. Using hydrogen fuel cell engines will increase hydrogen consumption and result in low vehicle operation efficiency. Summary of the Invention

[0004] The present invention provides a vehicle drive system for hydrogen energy hybrid to realize the driving of a vehicle by hydrogen energy hybrid.

[0005] According to one aspect of the present invention, there is provided a vehicle drive system for hydrogen energy hybrid, the system comprising: a controller, a hydrogen fuel engine module and a hydrogen fuel cell module connected to the controller;

[0006] The controller is configured to obtain start information, determine whether the start information meets a preset condition, if so, generate an engine operation instruction, and send the engine operation instruction to the hydrogen fuel engine module, otherwise, generate a fuel cell operation instruction, and send the fuel cell operation instruction to the hydrogen fuel cell module;

[0007] The hydrogen fuel engine module is configured to receive the engine operation instruction and drive the vehicle according to the engine operation instruction;

[0008] The hydrogen fuel cell module is configured to receive the fuel cell operation instruction and drive the vehicle according to the fuel cell operation instruction.

[0009] Preferably, the system further comprises an accelerator pedal module connected to the controller; the accelerator pedal module is configured to obtain an opening instruction and send the opening instruction to the controller; the controller is configured to receive the opening instruction and obtain start information according to the opening instruction, wherein the start information includes environmental temperature information and vehicle stationary duration.

[0010] Preferably, the system further includes a hydrogen supply and gas supply module respectively connected to the controller, the hydrogen fuel engine module, and the hydrogen fuel cell module; the controller is further configured to send an engine operation instruction or a fuel cell operation instruction to the hydrogen supply and gas supply module; the hydrogen supply and gas supply module is configured to receive the engine operation instruction or the fuel cell operation instruction, and supply hydrogen and gas to the hydrogen fuel engine module according to the engine operation instruction, and supply hydrogen and gas to the hydrogen fuel cell module according to the fuel cell operation instruction.

[0011] Preferably, the system further includes a cooling module respectively connected to the controller, the hydrogen fuel engine module, and the hydrogen fuel cell module; the controller is further configured to send an engine operation instruction to the cooling module; the cooling module is configured to receive the engine operation instruction, detect the coolant temperature according to the engine operation instruction, send the detected coolant temperature to the controller, and preheat the hydrogen fuel cell module according to the coolant temperature; the controller is configured to receive the coolant temperature, generate a fuel cell gas supply instruction and an engine stop instruction according to the coolant temperature, send the fuel cell gas supply instruction to the hydrogen supply and gas supply module, and send the engine stop instruction to the hydrogen fuel engine module; the hydrogen supply and gas supply module is configured to receive the fuel cell gas supply instruction and supply gas to the hydrogen fuel cell module according to the fuel cell gas supply instruction; the hydrogen fuel engine module is configured to receive the engine stop instruction and stop working according to the engine stop instruction.

[0012] Preferably, the controller is further configured to obtain the vehicle running power, generate an engine preheating instruction according to the vehicle running power, and send the engine preheating instruction to the cooling module; the cooling module is configured to receive the engine preheating instruction and preheat the hydrogen fuel engine module according to the engine preheating instruction.

[0013] Preferably, the controller is further configured to generate a gas supply instruction and a fuel cell stop instruction according to the vehicle running power, send the gas supply instruction to the hydrogen supply and gas supply module, and send the fuel cell stop instruction to the hydrogen fuel cell module; the hydrogen supply and gas supply module is configured to receive the gas supply instruction and supply gas to the hydrogen fuel engine module and the hydrogen fuel cell module according to the gas supply instruction; the hydrogen fuel cell module is configured to receive the fuel cell stop instruction and stop working according to the fuel cell stop instruction.

[0014] Preferably, the system further includes a battery module respectively connected to the accelerator pedal module, the hydrogen supply and gas supply module, and the cooling module; the accelerator pedal module is further configured to send an activation instruction to the battery module; the battery module is configured to receive the activation instruction and supply power to the hydrogen supply and gas supply module and the cooling module according to the activation instruction.

[0015] Preferably, the system further includes a voltage conversion module connected to the hydrogen fuel cell module, and a motor module connected to the voltage conversion module; the hydrogen fuel cell module is configured to generate an initial voltage according to a fuel cell operation instruction and transmit the initial voltage to the voltage conversion module; the voltage conversion module is configured to receive the initial voltage, perform voltage conversion on the initial voltage to generate a final voltage, and send the final voltage to the motor module; the motor module is configured to receive the final voltage and drive the vehicle under the final voltage.

[0016] Preferably, the system further includes a driving device connected to the motor module; the motor module is configured to generate first driving information according to the final voltage and transmit the first driving information to the driving device; the driving device is configured to receive the first driving information and drive the vehicle according to the first driving information.

[0017] Preferably, the driving device is further connected to the hydrogen fuel engine module; the hydrogen fuel engine module is further configured to generate second driving information according to an engine operation instruction and transmit the second driving information to the driving device; the driving device is configured to receive the second driving information and drive the vehicle according to the second driving information.

[0018] The technical solution of the embodiment of the present invention, by obtaining start-up information, generating an engine operation instruction or a fuel cell operation instruction according to different preset conditions, operating the hydrogen fuel engine module under preset conditions that are not suitable for the operation of the hydrogen fuel cell module, increases the impact durability of the stack, combines the advantages of both to improve the driving efficiency, and thereby reduces the cost.

[0019] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0021] Figure 1 is a schematic structural diagram of a vehicle drive system for hydrogen energy hybrid according to Embodiment 1 of the present invention;

[0022] Figure 2 is another schematic structural diagram of a vehicle drive system for hydrogen energy hybrid according to Embodiment 1 of the present invention;

[0023] Figure 3It is a schematic structural diagram of a hydrogen supply and gas supply module of a hydrogen energy hybrid vehicle drive system provided in Embodiment 1 of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the composition of an internal power system of a system provided in Embodiment 1 of the present invention;

[0025] Figure 5 It is a schematic diagram of a system operation coordination strategy provided in Embodiment 1 of the present invention;

[0026] Figure 6 It is a schematic structural diagram of another hydrogen energy hybrid vehicle drive system provided in Embodiment 2 of the present invention. Detailed implementation manners

[0027] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Embodiment 1

[0030] Figure 1 It is a schematic structural diagram of a hydrogen energy hybrid vehicle drive system provided in Embodiment 1 of the present invention. The system includes: a controller 110, a hydrogen fuel engine module 120 and a hydrogen fuel cell module 130 connected to the controller 110.

[0031] Preferably, the controller 110 is configured to obtain start-up information, determine whether the start-up information meets a preset condition, if so, generate an engine operation instruction, and send the engine operation instruction to the hydrogen fuel engine module 120; otherwise, generate a fuel cell operation instruction and send the fuel cell operation instruction to the hydrogen fuel cell module 130. The hydrogen fuel engine module 120 is configured to receive the engine operation instruction and drive the vehicle according to the engine operation instruction. The hydrogen fuel cell module 130 is configured to receive the fuel cell operation instruction and drive the vehicle according to the fuel cell operation instruction.

[0032] Among them, the controller 110 refers to the control center of the vehicle. The controller 110 can obtain start-up information through sensors. The start-up information refers to the ambient temperature information and the vehicle stationary duration. Among them, the ambient temperature information refers to the temperature around the vehicle when it starts, and the vehicle stationary duration refers to the time when the whole vehicle stops running. The hydrogen fuel engine module 120 refers to a power device that releases the chemical energy of reaction gas by burning hydrogen and oxygen in the cylinder and does work by the expansion of the reaction gas. The hydrogen fuel cell module 130 refers to a power generation device that directly converts hydrogen and oxygen into electrical energy through an electrochemical reaction.

[0033] Specifically, after the controller 110 obtains the start-up information, it can determine whether the start-up information meets the preset condition. The preset condition is set inside the controller 110 in advance by R & D personnel according to the performance advantages of the hydrogen fuel engine and the hydrogen fuel cell. An engine operation instruction is generated in low-temperature start-up and the high-speed high-load area of the whole vehicle, and the vehicle is driven by the hydrogen fuel engine. A fuel cell operation instruction is generated in normal-temperature start-up and the low-speed low-load area and medium-speed medium-load area of the whole vehicle, and the vehicle is driven by the hydrogen fuel cell. That is, the hydrogen fuel cell module 130 and the hydrogen fuel engine module 120 respectively represent two different power systems: the power system 1 with the hydrogen fuel engine module 120 as the core and the power system 2 with the hydrogen fuel cell module 130 as the core.

[0034] Exemplarily, under the climatic condition that the ambient temperature information is lower than (including equal to) 0 °C, after the whole vehicle stops running for 2 - 3 hours, or under the climatic condition that the ambient temperature information is lower than (including equal to) -15 °C, after the whole vehicle stops running for 1 hour, or under the climatic condition that the ambient temperature information is lower than -20 °C (including equal to), after the whole vehicle stops running for 0.5 hour, the controller 110 will generate an engine operation instruction and send the engine operation instruction to the hydrogen fuel engine module 120. After receiving the engine operation instruction, the hydrogen fuel engine module 120 will drive the vehicle according to the engine operation instruction.

[0035] Specifically, if the above conditions are not met, the controller 110 will generate a fuel cell operation instruction. That is, under the climatic condition where the ambient temperature information is higher than 0°C, or under the climatic condition where the ambient temperature information is lower than (including equal to) 0°C, within 2 - 3 hours after the vehicle stops running, or under the climatic condition where the ambient temperature information is lower than (including equal to) -15°C, within 1 hour after the vehicle stops running, or under the climatic condition where the ambient temperature information is lower than -20°C (including equal to), within 0.5 hour after the vehicle stops running, the controller 110 will generate a fuel cell operation instruction and send the fuel cell operation instruction to the hydrogen fuel cell module 130. After receiving the fuel cell operation instruction, the hydrogen fuel cell module 130 will drive the vehicle according to the fuel cell operation instruction.

[0036] Figure 2 FIG. 4 is a schematic structural diagram of a vehicle drive system with hydrogen energy hybrid provided in Embodiment 1 of the present invention. The system further includes: an accelerator pedal module 140, a hydrogen supply and gas supply module 150, a cooling module 160, and a battery module 170.

[0037] Preferably, the system further includes an accelerator pedal module 140 connected to the controller 110; the accelerator pedal module 140 is configured to obtain an activation instruction and send the activation instruction to the controller 110; the controller 110 is configured to receive the activation instruction and obtain start information according to the activation instruction, where the start information includes ambient temperature information and vehicle stationary duration.

[0038] Specifically, the accelerator pedal module 140 refers to the accelerator pedal located inside the vehicle. The user can step on the accelerator pedal to generate an activation instruction to drive the vehicle. The accelerator pedal module 140 can obtain the activation instruction and send the activation instruction to the controller 110. After receiving the activation instruction, the controller 110 will obtain start information through a sensor. The start information includes ambient temperature information and vehicle stationary duration.

[0039] Preferably, the system further includes a hydrogen supply and gas supply module 150 respectively connected to the controller 110, the hydrogen fuel engine module 120, and the hydrogen fuel cell module 130; the controller 110 is further configured to send an engine operation instruction or a fuel cell operation instruction to the hydrogen supply and gas supply module 150; the hydrogen supply and gas supply module 150 is configured to receive the engine operation instruction or the fuel cell operation instruction, and supply hydrogen and gas to the hydrogen fuel engine module 120 according to the engine operation instruction, and supply hydrogen and gas to the hydrogen fuel cell module 130 according to the fuel cell operation instruction.

[0040] Figure 3It is a schematic structural diagram of a hydrogen supply and gas supply module 150 of a vehicle drive system with hydrogen energy hybrid according to Embodiment 1 of the present invention. Among them, the hydrogen supply and gas supply module 150 includes a hydrogen supply unit and a gas supply unit. The hydrogen supply unit can provide hydrogen required by the hydrogen fuel engine module 120 and the hydrogen fuel cell module 130, and the gas supply unit can provide oxygen required by the hydrogen fuel engine module 120 and the hydrogen fuel cell module 130. When the controller 110 obtains the start information, it will generate an engine operation instruction or a fuel cell operation instruction according to the start information, and send the engine operation instruction or the fuel cell operation instruction to the hydrogen supply and gas supply module 150. When the hydrogen supply and gas supply module 150 receives the engine operation instruction, it supplies hydrogen and gas to the hydrogen fuel engine. When the hydrogen supply and gas supply module 150 receives the fuel cell operation instruction, it supplies hydrogen and gas to the hydrogen fuel cell.

[0041] Preferably, the system further includes a cooling module 160 respectively connected to the controller 110, the hydrogen fuel engine module 120 and the hydrogen fuel cell module 130; the controller 110 is further configured to send the engine operation instruction to the cooling module 160; the cooling module 160 is configured to receive the engine operation instruction, detect the coolant temperature according to the engine operation instruction, send the detected coolant temperature to the controller 110, and preheat the hydrogen fuel cell module 130 according to the coolant temperature; the controller 110 is configured to receive the coolant temperature, generate a fuel cell gas supply instruction and an engine stop instruction according to the coolant temperature, send the fuel cell gas supply instruction to the hydrogen supply and gas supply module 150, and send the engine stop instruction to the hydrogen fuel engine module 120; the hydrogen supply and gas supply module 150 is configured to receive the fuel cell gas supply instruction and supply gas to the hydrogen fuel cell module 130 according to the fuel cell gas supply instruction; the hydrogen fuel engine module 120 is configured to receive the engine stop instruction and stop working according to the engine stop instruction.

[0042] Specifically, the cooling module 160 refers to a preheating device composed of a communicating pipe filled with coolant that can preheat the hydrogen fuel engine module 120 and the hydrogen fuel cell module 130; when the start information obtained by the controller 110 meets the preset conditions, the controller 110 will generate an engine operation instruction and send the engine operation instruction to the cooling module 160. After receiving the engine operation instruction, the cooling module 160 detects the internal coolant temperature through a sensor provided inside. When the coolant temperature exceeds the preheating threshold, the cooling module 160 can preheat the hydrogen fuel cell module 130. The preheating threshold is set in advance by R & D personnel. For example, the preheating threshold can be set to 0 degrees. When the cooling module 160 detects that the current coolant temperature exceeds 0 degrees, it can preheat the hydrogen fuel cell module 130.

[0043] Further, the cooling module 160 also sends the detected coolant temperature to the controller 110. When the controller 110 detects that the coolant temperature is greater than the fuel cell stack operating threshold, it generates a fuel cell air supply command and an engine stop command. The fuel cell stack operating threshold is pre-set inside the controller 110 by the R & D personnel according to the operating performance of the fuel cell stack. For example, the fuel cell stack operating threshold can be set to 80 degrees. When the controller 110 detects that the coolant temperature is greater than 80 degrees, it generates a fuel cell air supply command and an engine stop command. The controller 110 sends the fuel cell air supply command to the hydrogen supply and air supply module 150. When the hydrogen supply and air supply module 150 receives the fuel cell air supply command, it supplies hydrogen and air to the fuel cell module. The controller 110 sends the engine stop command to the hydrogen fuel engine module 120. When the hydrogen fuel engine module 120 receives the engine stop command, it stops working.

[0044] Preferably, the controller 110 is further configured to obtain the vehicle operating power, generate an engine preheating command according to the vehicle operating power, and send the engine preheating command to the cooling module 160. The cooling module 160 is configured to receive the engine preheating command and preheat the hydrogen fuel engine module 120 according to the engine preheating command.

[0045] Specifically, the vehicle operating power refers to the instantaneous power of the whole vehicle running. The controller 110 compares the obtained vehicle operating power with a power threshold. The power threshold is set by the R & D personnel according to the power demand of the whole vehicle, including a first power threshold and a second power threshold. When the vehicle operating power reaches the first power threshold, the controller 110 generates an engine preheating command and sends the engine preheating command to the cooling module 160. After receiving the engine preheating command, the cooling module 160 preheats the hydrogen fuel engine module 120 according to the engine preheating command. The first power threshold is 70% of the rated power of the power system 2.

[0046] Preferably, the controller 110 is further configured to generate an air supply command and a fuel cell stop command according to the vehicle operating power, send the air supply command to the hydrogen supply and air supply module 150, and send the fuel cell stop command to the hydrogen fuel cell module 130. The hydrogen supply and air supply module 150 is configured to receive the air supply command and supply air to the hydrogen fuel engine module 120 and the hydrogen fuel cell module 130 according to the air supply command. The hydrogen fuel cell module 130 is configured to receive the fuel cell stop command and stop working according to the fuel cell stop command.

[0047] Specifically, when the operating power of the vehicle reaches the second power threshold, the controller 110 generates a gas supply instruction and a fuel cell stop instruction, and sends the gas supply instruction to the hydrogen supply and gas supply module 150. After receiving the gas supply instruction, the hydrogen supply and gas supply module 150 supplies gas to both the hydrogen fuel engine module 120 and the hydrogen fuel cell module 130 simultaneously; when the operating power of the vehicle reaches the second power threshold, the controller 110 also generates a fuel cell stop instruction and sends it to the hydrogen fuel cell module 130. When the hydrogen fuel cell module 130 receives the fuel cell stop instruction, it gradually stops working. Here, the second power threshold is 85% of the rated power of the power system 2.

[0048] Preferably, the system further includes a battery module 170 respectively connected to the accelerator pedal module 140, the hydrogen supply and gas supply module 150, and the cooling module 160; the accelerator pedal module 140 is further configured to send an activation instruction to the battery module 170; the battery module 170 is configured to receive the activation instruction and supply power to the hydrogen supply and gas supply module 150 and the cooling module 160 according to the activation instruction.

[0049] Specifically, the battery module 170 is connected to the accelerator pedal module 140. The accelerator pedal sends an activation instruction to the battery module 170. After receiving the activation instruction, the battery module 170 powers on the hydrogen supply and gas supply module 150 and the cooling module 160 connected to it.

[0050] Figure 4 It is a schematic diagram of the composition structure of the internal power system of the system. Figure 4 It includes a power system 1 with the hydrogen fuel engine module 120 as the core represented by a dashed line and a power system 2 with the hydrogen fuel cell module 130 as the core represented by a dotted dashed line. The battery module 170, the hydrogen supply and gas supply module 150, and the cooling module 160 work together for the two power systems.

[0051] Furthermore, the controller 110 generates an engine operation instruction or a fuel cell operation instruction according to the start information and preset conditions. The two different operation instructions represent two control strategies of the controller 110 under different ambient temperature information and vehicle stationary duration. Figure 5 It is a diagram of the system operation coordination strategy, as Figure 5 shown. Control strategy 1 means that when the start information meets the preset conditions, i.e., cold start, the controller 110 generates an engine operation instruction, that is, preferably uses the power system 1, and then switches from the power system 1 to the power system 2 during low-speed and low-load operation and medium-speed and medium-load operation, and finally uses the power system 1 during high-speed and high-load operation; while control strategy 2 means that when the start information does not meet the preset conditions, i.e., hot start, the controller 110 generates a fuel cell operation instruction, that is, preferably uses the power system 2, and then switches from the power system 2 to the power system 1 during high-speed and high-load operation. Specific implementation manner:

[0053] Control strategy 1: Under the climatic conditions where the ambient temperature information is lower than (including equal to) 0°C, after the whole vehicle stops running for 2 - 3 hours, or under the climatic conditions where the ambient temperature information is lower than (including equal to) -15°C, after the whole vehicle stops running for 1 hour, or under the climatic conditions where the ambient temperature information is lower than -20°C (including equal to), after the whole vehicle stops running for 0.5 hour, when the user steps on the accelerator pedal, the accelerator pedal module 140 will obtain an opening instruction and send the opening instruction to the controller 110 and the battery module 170. After receiving the opening instruction transmitted by the accelerator pedal module 140, the battery module 170 will supply power to the hydrogen supply and gas supply module 150 and the cooling module 160. After receiving the opening instruction transmitted by the accelerator pedal module 140, the controller 110 will select control strategy 1 to drive the vehicle, that is, generate an engine operation instruction and send the engine operation instruction to the hydrogen fuel engine module 120. After receiving the engine operation instruction, the hydrogen fuel engine module 120 will inject hydrogen and ignite to smoothly start the vehicle. As the vehicle starts, the temperature of the coolant in the cooling module 160 gradually rises. The cooling module 160 will detect the internal coolant temperature through a sensor and send the coolant temperature to the controller 110. When the cooling module 160 determines that the coolant temperature reaches the preheating threshold, it will open the coolant connection and circulation of the fuel cell stack in the hydrogen fuel cell module 130 in power system 2, and preheat the hydrogen fuel cell module 130 while power system 1 is running. When the coolant temperature reaches the operating temperature of the fuel cell stack, the controller 110 will generate a fuel cell gas supply instruction and an engine stop instruction. At this time, the hydrogen supply and gas supply module 150 will supply gas to the hydrogen fuel cell. After the operation is stable, the hydrogen fuel engine module 120 will gradually stop working according to the engine stop instruction, that is, switch from power system 1 to power system 2. As the power demand of the whole vehicle gradually increases to 70% of the rated power of power system 2, the controller 110 will generate an engine preheating instruction and send it to the cooling module 160. At this time, the cooling module 160 will open the coolant connection and circulation of the hydrogen fuel engine module 120 for preheating. As the power demand of the whole vehicle gradually increases to 85% of the rated power of power system 2, the controller 110 will generate a gas supply instruction and a fuel cell stop instruction and send them to the hydrogen supply and gas supply module 150 and the hydrogen fuel cell module 130 respectively. At this time, the hydrogen supply and gas supply module 150 will supply gas to the hydrogen fuel engine module 120 at the same time, start power system 1, and gradually stop power system 2.

[0054] Control Strategy 2: Under the climatic conditions where the ambient temperature information is higher than 0°C or under the climatic conditions where the ambient temperature information is lower than (including equal to) 0°C, within 2 - 3 hours after the whole vehicle stops running or under the climatic conditions where the ambient temperature information is lower than (including equal to) -15°C, within 1 hour after the whole vehicle stops running or under the climatic conditions where the ambient temperature information is lower than (including equal to) -20°C, within 0.5 hour after the whole vehicle stops running, after the user steps on the accelerator pedal, the accelerator pedal module 140 will obtain the start instruction and send the start instruction to the controller 110 and the battery module 170. After receiving the start instruction transmitted by the accelerator pedal module 140, the battery module 170 will supply power to the hydrogen supply and gas supply module 150 and the cooling module 160. After receiving the start instruction transmitted by the accelerator pedal module 140, the controller 110 will select Control Strategy 2 to drive the vehicle, that is, generate a fuel cell operation instruction and send the fuel cell operation instruction to the hydrogen fuel cell module 130. The hydrogen fuel cell module 130 can output current to start the vehicle smoothly. As the power demand of the whole vehicle gradually increases to 70% of the rated power of the power system 2, the controller 110 will generate an engine preheating instruction and send it to the cooling module 160. At this time, the cooling module 160 will turn on the coolant connection cycle of the hydrogen fuel engine module 120 for preheating. As the power demand of the whole vehicle gradually increases to 85% of the rated power of the power system 2, the controller 110 will generate a gas supply instruction and a fuel cell stop instruction and send them to the hydrogen supply and gas supply module 150 and the hydrogen fuel cell module 130 respectively. At this time, the hydrogen supply and gas supply module 150 will supply gas to the hydrogen fuel engine module 120 at the same time, start the power system 1, and gradually stop the power system 2.

[0055] The technical solution of the embodiment of the present invention obtains start information, generates an engine operation instruction or a fuel cell operation instruction according to different preset conditions, and operates the hydrogen fuel engine module under the preset conditions that are not suitable for the operation of the hydrogen fuel cell module, increasing the impact durability of the stack, combining the advantages of both to improve the driving efficiency, and thus reducing the cost.

[0056] Embodiment 2

[0057] Figure 6 It is a structural schematic diagram of a vehicle drive system with hydrogen energy hybrid provided by Embodiment 2 of the present invention. In this embodiment, a voltage conversion module 180, a motor module 190, and a driving device 200 are added on the basis of Embodiment 1 above, as Figure 6 shown, the voltage conversion module 180 is connected to the hydrogen fuel cell module 130, the motor module 190 is connected to the voltage conversion module 180, and the driving device 200 is connected to the motor module 190 and the hydrogen fuel engine module 120.

[0058] Preferably, the hydrogen fuel cell module 130 is configured to generate an initial voltage according to a fuel cell operation instruction and transmit the initial voltage to the voltage conversion module 180; the voltage conversion module 180 is configured to receive the initial voltage, perform voltage conversion on the initial voltage to generate a final voltage, and send the final voltage to the motor module 190; the motor module 190 is configured to receive the final voltage and drive the vehicle under the final voltage.

[0059] Specifically, when the hydrogen fuel cell module 130 receives a fuel cell operation instruction, it will directly convert hydrogen and oxygen into electrical energy through an internal fuel cell stack. However, since the output initial voltage value is small and cannot reach the operating voltage of the motor, the initial voltage generated by the hydrogen fuel cell module 130 will first pass through the voltage conversion module 180. The voltage conversion module 180 can be a DC / DC converter, which is configured to boost-convert the initial voltage to generate a final voltage and send the final voltage to the motor module 190. The motor module 190 will drive the vehicle under the final voltage.

[0060] Preferably, the motor module 190 is configured to generate first driving information according to the final voltage and send the first driving information to the driving device 200; the driving device 200 is configured to receive the first driving information and drive the vehicle according to the first driving information.

[0061] Specifically, the system further includes a driving device 200 connected to the motor module 190. The driving device 200 refers to the driving wheel set of the vehicle and is used to drive the vehicle. The motor module 190 can generate first driving information according to the final voltage. The first driving information includes the rotational speed and power of the vehicle. After receiving the first driving information, the driving device 200 will drive the vehicle with the first driving information.

[0062] Preferably, the hydrogen fuel engine module 120 is further configured to generate second driving information according to an engine operation instruction and send the second driving information to the driving device 200; the driving device 200 is configured to receive the second driving information and drive the vehicle according to the second driving information.

[0063] Specifically, the driving device 200 is also connected to the hydrogen fuel engine module 120. The hydrogen fuel engine module 120 can generate second driving information according to an engine operation instruction. After the torque of the engine, the transmission inside the hydrogen fuel engine module 120 adjusts the rotational speed, torque, and rotation direction of the output shaft of the engine, and uses the above parameters as the second driving information of the vehicle. After receiving the second driving information, the driving device 200 will drive the vehicle with the second driving information.

[0064] The technical solution of the embodiment of the present invention obtains startup information, generates an engine operation instruction or a fuel cell operation instruction according to different preset conditions, operates the hydrogen fuel engine module under preset conditions that are not suitable for the operation of the hydrogen fuel cell module, increases the impact durability of the stack, combines the advantages of both to improve the driving efficiency, thereby reducing the cost, and boosts the initial voltage of the hydrogen fuel cell through a voltage conversion module to ensure that the working voltage of the motor module is reached, further improving the driving efficiency of the vehicle.

Claims

1. A vehicle drive system with hydrogen energy hybrid, characterized in that, it includes: a controller, a hydrogen fuel engine module and a hydrogen fuel cell module connected to the controller; the controller is used to obtain start information, judge whether the start information meets a preset condition, if it meets, generate an engine operation instruction, and send the engine operation instruction to the hydrogen fuel engine module, otherwise, generate a fuel cell operation instruction, and send the fuel cell operation instruction to the hydrogen fuel cell module; the hydrogen fuel engine module is used to receive the engine operation instruction and drive the vehicle according to the engine operation instruction; the hydrogen fuel cell module is used to receive the fuel cell operation instruction and drive the vehicle according to the fuel cell operation instruction; wherein, the system further includes a hydrogen supply and gas supply module respectively connected to the controller, the hydrogen fuel engine module and the hydrogen fuel cell module; the controller is further used to send the engine operation instruction or the fuel cell operation instruction to the hydrogen supply and gas supply module; the hydrogen supply and gas supply module is used to receive the engine operation instruction or the fuel cell operation instruction, and supply hydrogen and gas to the hydrogen fuel engine module according to the engine operation instruction, and supply hydrogen and gas to the hydrogen fuel cell module according to the fuel cell operation instruction; the system further includes a cooling module respectively connected to the controller, the hydrogen fuel engine module and the hydrogen fuel cell module; the controller is further used to send the engine operation instruction to the cooling module; the cooling module is used to receive the engine operation instruction, detect the coolant temperature according to the engine operation instruction, send the detected coolant temperature to the controller, and preheat the hydrogen fuel cell module according to the coolant temperature; the controller is used to receive the coolant temperature, generate a fuel cell gas supply instruction and an engine stop instruction according to the coolant temperature, send the fuel cell gas supply instruction to the hydrogen supply and gas supply module, and send the engine stop instruction to the hydrogen fuel engine module; the hydrogen supply and gas supply module is used to receive the fuel cell gas supply instruction and supply gas to the hydrogen fuel cell module according to the fuel cell gas supply instruction; the hydrogen fuel engine module is used to receive the engine stop instruction and stop working according to the engine stop instruction.

2. The system according to claim 1, characterized in that, the system further includes an accelerator pedal module connected to the controller; the accelerator pedal module is used to obtain an opening instruction and send the opening instruction to the controller; the controller is used to receive the opening instruction and obtain the start information according to the opening instruction, wherein the start information includes environmental temperature information and vehicle stationary duration.

3. The system according to claim 2, characterized in that, the controller is further used to obtain the vehicle running power, generate an engine preheating instruction according to the vehicle running power, and send the engine preheating instruction to the cooling module; The cooling module is configured to receive the engine preheating instruction and preheat the hydrogen fuel engine module according to the engine preheating instruction.

4. The system according to claim 3, wherein, the controller is further configured to generate a hydrogen supply instruction and a fuel cell stop instruction according to the vehicle operating power, and send the hydrogen supply instruction to the hydrogen supply and gas supply module and send the fuel cell stop instruction to the hydrogen fuel cell module; the hydrogen supply and gas supply module is configured to receive the hydrogen supply instruction and supply gas to the hydrogen fuel engine module and the hydrogen fuel cell module according to the hydrogen supply instruction; the hydrogen fuel cell module is configured to receive the fuel cell stop instruction and stop working according to the fuel cell stop instruction.

5. The system according to claim 4, wherein, the system further includes a battery module respectively connected to the accelerator pedal module, the hydrogen supply and gas supply module, and the cooling module; the accelerator pedal module is further configured to send the start instruction to the battery module; the battery module is configured to receive the start instruction and supply power to the hydrogen supply and gas supply module and the cooling module according to the start instruction.

6. The system according to claim 1, wherein, the system further includes a voltage conversion module connected to the hydrogen fuel cell module and a motor module connected to the voltage conversion module; the hydrogen fuel cell module is configured to generate an initial voltage according to the fuel cell operation instruction and transmit the initial voltage to the voltage conversion module; the voltage conversion module is configured to receive the initial voltage, perform voltage conversion on the initial voltage to generate a final voltage, and send the final voltage to the motor module; the motor module is configured to receive the final voltage and drive the vehicle under the final voltage.

7. The system according to claim 6, wherein, the system further includes a drive device connected to the motor module; the motor module is configured to generate first drive information according to the final voltage and send the first drive information to the drive device; the drive device is configured to receive the first drive information and drive the vehicle according to the first drive information.

8. The system according to claim 7, wherein, the drive device is further connected to the hydrogen fuel engine module; the hydrogen fuel engine module is further configured to generate second drive information according to the engine operation instruction and send the second drive information to the drive device; the drive device is configured to receive the second drive information and drive the vehicle according to the second drive information.

Images