A hydrogen vehicle energy feedback management system and management method thereof

Abstract

The present invention discloses a hydrogen vehicle energy feedback management system and a management method thereof. The system includes a vehicle controller electrically connected to a display module, an energy storage device, a motor controller, a fuel cell controller, and a brake controller, and the brake controller is electrically connected to a wheel speed sensor and a brake pedal travel sensor. The present invention initiates braking energy feedback by the brake controller, which can greatly improve the energy feedback efficiency. When the braking deceleration is low, it is completely completed by motor regenerative braking. The braking energy is completely converted into electrical energy by the motor and stored in the energy storage device, thereby improving the braking energy recovery efficiency. The energy of the fuel cell system can also be recovered, and the use of the brake pedal travel sensor can calculate the vehicle's braking deceleration, greatly improving the economy and safety of braking energy recovery. The use of the wheel speed sensor to input to the brake controller to calculate the vehicle speed is more accurate than using the motor speed to indirectly calculate the vehicle speed.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen-powered vehicles, and in particular to a hydrogen-powered vehicle energy feedback management system and a management method thereof. Background Art

[0002] Hydrogen-powered vehicles are rapidly developing in my country, with various performance indicators meeting operational requirements and beginning to move toward large-scale industrialization. However, for a new energy system to be promoted and applied, its environmental and economic performance must be prioritized. Improving the environmental and economic performance of hydrogen vehicle energy regenerative control systems is an urgent issue that needs to be addressed. Summary of the Invention

[0003] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art and to propose a hydrogen vehicle energy feedback management system that greatly improves the energy feedback efficiency.

[0004] A hydrogen vehicle energy feedback management system of the present invention includes a vehicle controller, a brake controller, a brake pedal travel sensor, a wheel speed sensor, a display module, an energy storage device, a motor controller, and a fuel cell controller; the vehicle controller is electrically connected to the display module, the energy storage device, the motor controller, the fuel cell controller, and the brake controller, respectively, and the brake controller is electrically connected to the wheel speed sensor and the brake pedal travel sensor, respectively.

[0005] Furthermore, the brake controller is electrically connected to the wheel speed sensor via a hard wire.

[0006] Furthermore, the display module includes a control circuit and a liquid crystal screen. The vehicle controller communicates with the control circuit through a CAN bus, and the control circuit communicates with the liquid crystal screen through a serial communication line. The control circuit is used to process the mode signal sent by the vehicle controller, obtain corresponding energy flow diagram information, and transmit it to the liquid crystal screen. The liquid crystal screen displays the corresponding energy flow diagram.

[0007] Furthermore, the energy flow diagram is displayed in an animated form on the liquid crystal screen, including a structural diagram consisting of a fuel cell, an energy storage device, a motor and wheels, and dynamic lines indicating the direction of energy flow between them.

[0008] Furthermore, the display module is assembled on the multimedia player.

[0009] A management method for a hydrogen vehicle energy regenerative management system, wherein the braking energy regeneration triggering conditions are as follows:

[0010] 1.1 The vehicle is in the Ready state, and the brake controller receives the Ready signal from the vehicle controller;

[0011] 1.2 When the vehicle speed is greater than or equal to 10 km / h, the brake controller sends a speed signal to the vehicle controller, where the vehicle speed is calculated by the wheel speed sensor input to the brake controller;

[0012] 1.3 The vehicle is in gear D or R, and the brake controller receives the gear signal from the vehicle controller indicating that the gear is in gear D or R;

[0013] 1.4 The brake pedal opening is greater than 0%, and the brake pedal travel signal received by the brake controller from the brake pedal travel sensor is greater than 0%;

[0014] 1.5 No fault that prohibits energy recovery occurs;

[0015] If all conditions 1.1-1.5 are met, the vehicle can enter the brake energy recovery mode. The brake controller calculates and sends the brake feedback torque to the vehicle controller based on the brake pedal travel opening signal from the brake pedal travel sensor, the peak charging power of the energy storage device, and the maximum power generation torque sent by the motor controller. The vehicle controller is responsible for executing the brake feedback torque and sending a torque request to the motor controller for execution. The motor controller operates in the power generation mode to charge the energy storage device. At the same time, the fuel cell controller can also operate in the power generation mode according to the required power sent by the vehicle controller to charge the energy storage device.

[0016] If any of the conditions described in 1.1-1.5 above is not met, the braking energy recovery mode will be exited.

[0017] Furthermore, in condition 1.5, the anti-lock braking system (ABS) function of the brake controller is not activated, the electronic stability system (ESC) function is not activated, the vehicle speed sent by the brake controller is valid and the vehicle's direction of travel is consistent with the vehicle gear sent by the vehicle controller, and the cruise mode sent by the vehicle controller is not in cruise mode, etc., and all systems have not entered fault mode.

[0018] The conditions for triggering coasting energy recovery are as follows:

[0019] 2.1 The vehicle is in the Ready state, and the brake controller receives the Ready signal from the vehicle controller;

[0020] 2.2 When the vehicle speed is greater than or equal to 10 km / h, the brake controller sends a speed signal to the vehicle controller, where the vehicle speed is calculated by the wheel speed sensor input to the brake controller;

[0021] 2.3 The vehicle is in gear D or R, and the brake controller receives the gear position signal from the vehicle controller indicating that the gear is in gear D or R;

[0022] 2.4 The brake pedal opening is equal to 0%, and the brake pedal travel signal received by the brake controller from the brake pedal travel sensor is equal to 0%;

[0023] 2.5 No fault that prohibits energy recovery occurs;

[0024] 2.6 The throttle opening is less than 8%; the throttle opening signal sent by the vehicle controller is less than 8%;

[0025] If the above conditions are met, the vehicle can enter the sliding energy recovery mode. The vehicle controller calculates the motor required torque based on the vehicle's target deceleration Zg, the peak charging power of the energy storage device, and the maximum power generation torque sent by the motor controller, and sends it to the motor controller for execution. The motor controller operates in the power generation mode to charge the energy storage device. At the same time, the fuel cell controller can also operate in the power generation mode according to the required power sent by the vehicle controller to charge the energy storage device. Among them, the value of the target deceleration Zg is set according to demand.

[0026] Furthermore, in condition 2.5, the anti-lock braking system (ABS) function of the brake controller is not activated, the electronic stability system (ESC) function is not activated, the vehicle speed sent by the brake controller is valid and the vehicle's direction of travel is consistent with the vehicle gear sent by the vehicle controller, and the cruise mode sent by the vehicle controller is not in cruise mode, etc., and all systems have not entered fault mode.

[0027] The hydrogen vehicle energy feedback management system of the present invention initiates braking energy feedback by the brake controller, which can greatly improve the energy feedback efficiency. When the braking deceleration is low, it is completely completed by motor regenerative braking. The braking energy is completely converted into electrical energy by the motor and stored in the energy storage device, thereby improving the braking energy recovery efficiency. The energy of the fuel cell system can also be recovered, and the use of the brake pedal travel sensor can calculate the vehicle's braking deceleration, greatly improving the economy and safety of brake energy recovery. The use of wheel speed sensors to input to the brake controller to calculate the vehicle speed is more accurate than indirectly calculating the vehicle speed using the motor speed. The rich energy flow display brings more driving pleasure to the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a hydrogen vehicle energy feedback management system according to the present invention;

[0029] Figure 2 This is a flow chart of a management method of a hydrogen vehicle energy feedback management system according to the present invention;

[0030] Figure 3 An energy flow diagram of pure electric mode energy feedback of a hydrogen vehicle energy feedback management system according to the present invention;

[0031] Figure 4 An energy flow diagram of hybrid mode energy feedback of a hydrogen vehicle energy feedback management system according to the present invention;

[0032] Figure 5 This is a structural schematic diagram of a display module of a hydrogen vehicle energy feedback management system according to the present invention.

[0033] 1-Vehicle controller; 2-Brake controller; 3-Brake pedal travel sensor; 4-Wheel speed sensor; 5-Display module; 6-Energy storage device; 7-Motor controller; 8-Fuel cell controller; 9-Fuel cell; 10-Motor; 11-Wheel; 12-Dynamic lines; 13-Multimedia player; 14-Control circuit; 15-LCD screen. DETAILED DESCRIPTION

[0034] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0035] like Figure 1 As shown, a hydrogen vehicle energy feedback management system of the present invention includes a vehicle controller 1, a brake controller 2, a brake pedal travel sensor 3, a wheel speed sensor 4, a display module 5, an energy storage device 6, a motor controller 7, and a fuel cell controller 8; the vehicle controller 1 is electrically connected to the display module 5, the energy storage device 6, the motor controller 7, the fuel cell controller 8 and the brake controller 2 respectively, and the brake controller 2 is electrically connected to the wheel speed sensor 4 and the brake pedal travel sensor 3 respectively.

[0036] The function of the brake pedal travel sensor 3 is to collect the travel of the brake pedal;

[0037] The function of the brake controller 2 is to collect the signal of the brake pedal travel sensor 3, the wheel speed signal, etc., to realize the functions of anti-lock braking of the wheel 11, electronic brake force distribution, vehicle dynamic control, drive anti-skid control, etc.

[0038] The wheel speed sensor 4 collects the wheel speed of the four wheels and sends it to the brake pedal travel sensor 3 through a hard-wired signal;

[0039] The function of the vehicle controller 1 is to analyze the driver's needs, manage energy, torque, handle faults, display instrument lights, and perform high-voltage power on and off.

[0040] The function of the display module 5 is to serve as a combination instrument to display important information such as the vehicle's gear position and speed;

[0041] The function of the energy storage device 6 is to store electrical energy and assist the fuel cell 9 in starting up.

[0042] The function of the fuel cell controller 8 is to collect the key voltage, current and temperature data of the fuel system and control all electrical components such as the hydrogen circulation pump, air compressor, water pump, etc. inside the system.

[0043] When the vehicle enters the brake energy recovery mode, the brake controller 2 calculates and sends the brake feedback torque to the vehicle controller 1 based on the brake pedal travel opening signal of the brake pedal travel sensor 3, the peak charging power of the energy storage device 6 and the maximum power generation torque sent by the motor controller 7. The vehicle controller 1 is responsible for executing the brake feedback torque and sending a torque request to the motor controller 7 for execution. The motor controller 7 operates in the power generation mode to charge the energy storage device 6. At the same time, the fuel cell controller 8 can also operate in the power generation mode according to the required power sent by the vehicle controller 1 to charge the energy storage device 6.

[0044] When the vehicle enters the sliding energy recovery mode, the vehicle controller 1 calculates the required torque of the motor 10 based on the vehicle's target deceleration Zg, the peak charging power of the energy storage device 6, and the maximum power generation torque sent by the motor controller 7, and sends it to the motor controller 7 for execution. The motor controller 7 operates in the power generation mode to charge the energy storage device 6. At the same time, the fuel cell controller 8 can also operate in the power generation mode according to the required power sent by the vehicle controller 1 to charge the energy storage device 6; the value of the target deceleration Zg is set as required.

[0045] A hydrogen vehicle energy feedback management system of the present invention initiates braking energy feedback by a brake controller 2, which can greatly improve the energy feedback efficiency. When the braking deceleration is low, it is completely completed by regenerative braking by the motor 10. The braking energy is completely converted into electrical energy by the motor 10 and stored in the energy storage device 6, thereby improving the braking energy recovery efficiency; the energy of the fuel cell 9 system can also be recovered, and the use of the brake pedal travel sensor 3 can calculate the vehicle's braking deceleration, thereby greatly improving the economy and safety of braking energy recovery.

[0046] The brake controller 2 may be electrically connected to the wheel speed sensor 4 via a hard wire.

[0047] like Figure 5 As shown, there are various structures of the display module 5. In this embodiment, the display module 5 may include a control circuit 14 and a liquid crystal screen 15. The vehicle controller 1 communicates with the control circuit 14 through a CAN bus, and the control circuit 14 communicates with the liquid crystal screen 15 through a serial communication line. The control circuit 14 is used to process the mode signal sent by the vehicle controller 1, obtain corresponding energy flow diagram information, and transmit it to the liquid crystal screen 15. The liquid crystal screen 15 displays the corresponding energy flow diagram.

[0048] The energy flow diagram is displayed in an animated form on the LCD screen 15, including a structural diagram consisting of the fuel cell 9, energy storage device 6, motor 10 and wheel 11, as well as dynamic lines 12 indicating the direction of energy flow between them. The rich energy flow display brings more driving pleasure to the driver. For example: Figure 3As shown, the energy flow of pure electric mode energy feedback (including braking energy feedback and coasting energy feedback) is displayed as follows: from wheel 11 to motor 10 to energy storage device 6; the energy flow of hybrid mode energy feedback (including braking energy feedback and coasting energy feedback) is displayed as follows: Figure 4 As shown, from the wheel 11 to the motor 10 to the energy storage device 6; at the same time, from the hydrogen fuel cell 9 to the energy storage device 6.

[0049] like Figure 5 As shown, there are many installation positions of the display module 5, which are not limited here. In order to facilitate user use and improve the interior decoration effect of the vehicle, the display module 5 can be installed on the multimedia player 13.

[0050] like Figure 2 As shown in FIG, a management method for a hydrogen vehicle energy feedback management system, the braking energy recovery triggering conditions are as follows:

[0051] 1.1 The vehicle is in the Ready state, and the brake controller 2 receives the Ready signal sent by the vehicle controller 1.

[0052] 1.2 When the vehicle speed is greater than or equal to X km / h, the brake controller 2 sends a vehicle speed signal to the vehicle controller 1. The vehicle speed is calculated by the wheel speed sensor 4 input to the brake controller 2. Calculating the vehicle speed using the wheel speed sensor 4 input to the brake controller 2 is more accurate than indirectly calculating the vehicle speed using the motor 10 speed.

[0053] 1.3 The vehicle gear is in D gear or R gear, and the brake controller 2 receives the gear position signal from the vehicle controller 1 as D gear or R gear.

[0054] 1.4 The brake pedal opening is greater than 0%, and the brake pedal stroke signal received by the brake controller 2 from the brake pedal stroke sensor 3 is greater than 0%.

[0055] 1.5 No fault that prohibits energy recovery has occurred; the anti-lock braking system (ABS) function of the brake controller 2 is not activated, the electronic stability system (ESC) function is not activated, the vehicle speed sent by the brake controller 2 is valid and the vehicle's direction of travel is consistent with the vehicle gear sent by the vehicle controller 1, and the cruise mode sent by the vehicle controller 1 is not in cruise mode, etc., and all systems have not entered fault mode.

[0056] If all conditions 1.1-1.5 are met, the vehicle enters the brake energy recovery mode. The brake controller 2 calculates and sends the brake feedback torque to the vehicle controller 1 based on the brake pedal travel opening signal from the brake pedal travel sensor 3, the peak charging power of the energy storage device 6, and the maximum power generation torque sent by the motor controller 7. The vehicle controller 1 is responsible for executing the brake feedback torque and sending a torque request to the motor controller 7 for execution. The motor controller 7 operates in the power generation mode to charge the energy storage device 6. At the same time, the fuel cell controller 8 can also operate in the power generation mode according to the required power sent by the vehicle controller 1 to charge the energy storage device 6.

[0057] If any of the above conditions 1.1-1.5 are not met, the braking energy recovery mode will be exited.

[0058] The conditions for triggering coasting energy recovery are as follows:

[0059] 2.1 The vehicle is in the Ready state, and the brake controller 2 receives the Ready signal from the vehicle controller 1;

[0060] 2.2 When the vehicle speed is greater than or equal to 10 km / h, the brake controller 2 sends a vehicle speed signal to the vehicle controller 1, where the vehicle speed is calculated by the wheel speed sensor 4 input to the brake controller 2; using the wheel speed sensor 4 to input the brake controller 2 to calculate the vehicle speed is more accurate than indirectly calculating the vehicle speed using the motor 10 speed.

[0061] 2.3 The vehicle gear is in D gear or R gear, and the brake controller 2 receives the gear position signal from the vehicle controller 1 as D gear or R gear.

[0062] 2.4 The brake pedal opening is equal to 0%, and the brake pedal stroke signal received by the brake controller 2 from the brake pedal stroke sensor 3 is equal to 0%.

[0063] 2.5 No fault that prohibits energy recovery has occurred; the anti-lock braking system (ABS) function of brake controller 2 is not activated, the electronic stability system (ESC) function is not activated, the vehicle speed sent by brake controller 2 is valid and the vehicle's direction of travel is consistent with the vehicle gear sent by vehicle controller 1, and the cruise mode sent by vehicle controller 1 is not in cruise mode, etc., and all systems have not entered fault mode.

[0064] 2.6 The throttle opening is less than 8%; the throttle opening signal sent by the vehicle controller 1 is less than 8%.

[0065] If the above conditions are met, the vehicle can enter the sliding energy recovery mode. The vehicle controller 1 calculates the required torque of the motor 10 based on the vehicle's target deceleration Zg, the peak charging power of the energy storage device 6 and the maximum power generation torque sent by the motor controller 7, and sends it to the motor controller 7 for execution. The motor controller 7 operates in the power generation mode to charge the energy storage device 6. At the same time, the fuel cell controller 8 can also operate in the power generation mode according to the required power sent by the vehicle controller 1 to charge the energy storage device 6; wherein, the value of the target deceleration Zg is set as required.

[0066] Any matters not mentioned above shall be subject to the existing technology.

[0067] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art of the present invention may make various modifications or additions to the described specific embodiments or replace them in similar ways, but they will not deviate from the direction of the present invention or exceed the scope defined by the appended claims. Those skilled in the art should understand that any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention should be included in the scope of protection of the present invention.

Claims

1. A management method for a hydrogen-powered automobile energy feedback management system, characterized in that: the hydrogen-powered automobile energy feedback management system comprises a vehicle controller (1), a brake controller (2), a brake pedal travel sensor (3), a wheel speed sensor (4), a display module (5), an energy storage device (6), a motor controller (7), and a fuel cell controller (8); the vehicle controller (1) is electrically connected to the display module (5), the energy storage device (6), the motor controller (7), the fuel cell controller (8), and the brake controller (2), respectively; the brake controller (2) is electrically connected to the wheel speed sensor (4) and the brake pedal travel sensor (3), respectively; The braking energy recovery triggering conditions are as follows: 1.1 The vehicle is in the Ready state, and the brake controller (2) receives the Ready signal from the vehicle controller (1); 1.2 When the vehicle speed is greater than or equal to X km / h, the brake controller (2) sends a vehicle speed signal to the vehicle controller (1), wherein the vehicle speed is calculated by the wheel speed sensor (4) and input to the brake controller (2); 1.3 The vehicle gear is in D gear or R gear, and the brake controller (2) receives the gear position signal from the vehicle controller (1) indicating that the gear position is D gear or R gear; 1.4 The brake pedal opening is greater than 0%, and the brake pedal stroke signal received by the brake controller (2) from the brake pedal stroke sensor (3) is greater than 0%; 1.5 No fault that prohibits energy recovery occurs; If all conditions 1.1-1.5 are met, the vehicle enters a braking energy recovery mode, and the brake controller (2) calculates and sends the braking feedback torque to the vehicle controller (1) based on the brake pedal stroke opening signal of the brake pedal stroke sensor (3), the peak charging power of the energy storage device (6), and the maximum power generation torque sent by the motor controller (7). The vehicle controller (1) is responsible for executing the braking feedback torque and sending a torque request to the motor controller (7) for execution. The motor controller (7) operates in a power generation mode to charge the energy storage device (6). At the same time, the fuel cell controller (8) can also operate in a power generation mode according to the required power sent by the vehicle controller (1) to charge the energy storage device (6). If any of the conditions described in 1.1-1.5 above is not met, the braking energy recovery mode will be exited; In condition 1.5, the anti-lock braking system ABS function of the brake controller (2) is not activated, the electronic stability system ESC function is not activated, the vehicle speed sent by the brake controller (2) is valid, the vehicle moving direction is consistent with the vehicle gear position sent by the vehicle controller (1), and the cruise mode sent by the vehicle controller (1) is not in cruise mode, and all systems have not entered the fault mode; The conditions for triggering coasting energy recovery are as follows: 2.1 The vehicle is in the Ready state, and the brake controller (2) receives the Ready signal from the vehicle controller (1); 2.2 When the vehicle speed is greater than or equal to 10 km / h, the brake controller (2) sends a vehicle speed signal to the vehicle controller (1), wherein the vehicle speed is calculated by the wheel speed sensor (4) and input to the brake controller (2); 2.3 The vehicle gear is in D gear or R gear, and the brake controller (2) receives the gear position signal from the vehicle controller (1) indicating that the gear is in D gear or R gear; 2.4 The brake pedal opening is equal to 0%, and the brake controller (2) receives a brake pedal stroke signal from the brake pedal stroke sensor (3) equal to 0%; 2.5 No fault that prohibits energy recovery occurs; 2.6 The throttle opening is less than 8%; the throttle opening signal sent by the vehicle controller (1) is less than 8%; If the above conditions are met, the vehicle enters the sliding energy recovery mode, and the vehicle controller (1) calculates the required torque of the motor (10) according to the vehicle target deceleration Zg, the peak charging power of the energy storage device (6) and the maximum power generation torque sent by the motor controller (7) and sends it to the motor controller (7) for execution. The motor controller (7) operates in the power generation mode to charge the energy storage device (6). At the same time, the fuel cell controller (8) can also operate in the power generation mode according to the required power sent by the vehicle controller (1) to charge the energy storage device (6); wherein the value of the target deceleration Zg is set according to the demand; In condition 2.5, the anti-lock braking system ABS function of the brake controller (2) is not activated, the electronic stability system ESC function is not activated, the vehicle speed sent by the brake controller (2) is valid and the vehicle moving direction is consistent with the vehicle gear sent by the vehicle controller (1), and the cruise mode sent by the vehicle controller (1) is not in cruise mode, etc., and all systems have not entered the fault mode.

2. A management method for a hydrogen vehicle energy feedback management system as claimed in claim 1, characterized in that the brake controller (2) is electrically connected to the wheel speed sensor (4) via a hard wire.

3. The method for managing a hydrogen vehicle energy feedback management system according to claim 1, characterized in that: The display module (5) includes a control circuit (14) and a liquid crystal screen (15). The vehicle controller (1) communicates with the control circuit (14) via a CAN bus, and the control circuit (14) communicates with the liquid crystal screen (15) via a serial communication line. The control circuit (14) is used to process a mode signal sent by the vehicle controller (1), obtain corresponding energy flow diagram information, and transmit the information to the liquid crystal screen (15). The liquid crystal screen (15) displays the corresponding energy flow diagram.

4. The method for managing a hydrogen vehicle energy feedback management system according to claim 3, characterized in that: The energy flow diagram is displayed in an animated form on the liquid crystal screen (15), including a structural diagram consisting of a fuel cell (9), an energy storage device (6), a motor (10) and a wheel (11), and a dynamic line (12) indicating the direction of energy flow between them.

5. The method for managing a hydrogen vehicle energy feedback management system according to claim 3, characterized in that: The display module (5) is mounted on the multimedia player (13).

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