阅读说明：本技术 一种氢燃料电池氢能汽车的坡道辅助系统 (Ramp auxiliary system of hydrogen fuel cell hydrogen energy automobile ) 是由 谭乐 郝义国 于 2021-06-04 设计创作，主要内容包括：本发明提供了一种氢燃料电池氢能汽车的坡道辅助系统,包括：整车控制器、燃料电池系统、动力电池系统、驱动电机控制器、驱动电机、配电箱和防抱死制动系统。整车控制器通过通讯信号线与燃料电池系统、动力电池系统、驱动电机控制器和防抱死制动系统相连接；燃料电池系统、动力电池系统和驱动电机控制器通过高压线与配电箱相连接,驱动电机控制器通过高压线连接驱动电机,整车控制器内置有倾角传感器,该倾角传感器用于采集坡度大小信息,整车控制器还与油门踏板和制动踏板通过采集信号线相连。本发明的有益效果是：解决了氢燃料电池汽车在坡上起步后溜的问题,且在不增加整车硬件成本的基础上,只通过VCU软件升级就可实现,应用成本低。(The invention provides a ramp auxiliary system of a hydrogen fuel cell hydrogen energy automobile, which comprises: the system comprises a vehicle control unit, a fuel cell system, a power cell system, a driving motor controller, a driving motor, a distribution box and an anti-lock braking system. The vehicle control unit is connected with the fuel cell system, the power battery system, the driving motor controller and the anti-lock braking system through communication signal lines; the fuel cell system, the power battery system and the driving motor controller are connected with the distribution box through high-voltage wires, the driving motor controller is connected with the driving motor through the high-voltage wires, an inclination angle sensor is arranged in the whole vehicle controller and used for acquiring gradient information, and the whole vehicle controller is further connected with an accelerator pedal and a brake pedal through acquisition signal wires. The invention has the beneficial effects that: the problem that the hydrogen fuel cell automobile slips after starting on a slope is solved, and the hydrogen fuel cell automobile can be realized only by upgrading VCU software on the basis of not increasing the hardware cost of the whole automobile, so that the application cost is low.)

1. A ramp auxiliary system of a hydrogen fuel cell hydrogen energy automobile is characterized in that: the ramp assist system includes: the system comprises a vehicle control unit, a fuel cell system, a power cell system, a driving motor controller, a driving motor, a distribution box and an anti-lock braking system, wherein the vehicle control unit is connected with the fuel cell system, the power cell system, the driving motor controller and the anti-lock braking system through communication signal lines;

dividing the torque F required for maintaining the vehicle to stay on the slope into two parts, wherein one part calibrates the corresponding torque F1 of the driving motor according to the current slope value and the vehicle load, and the other part calibrates the torque F2 regulated according to the rotating speed PI of the driving motor in real time, wherein F1+ F2 is F, and F is the target torque which can finally maintain the vehicle to stay on the slope;

the target torque is transmitted to the driving motor controller by the vehicle control unit, and the driving motor controller controls the motor to execute the target torque, so that a ramp auxiliary function is realized, and the target torque is used for preventing the ramp from slipping backwards when starting.

2. The ramp assist system of a hydrogen fuel cell hydrogen powered vehicle as claimed in claim 1, wherein: the power battery system comprises a battery management system.

3. The ramp assist system of a hydrogen fuel cell hydrogen powered vehicle as claimed in claim 1, wherein: the fuel cell system includes a fuel cell management system.

4. The ramp assist system of a hydrogen fuel cell hydrogen powered vehicle as claimed in claim 1, wherein: the anti-lock braking system is used for collecting wheel speed signals of each wheel.

5. The ramp assist system of a hydrogen fuel cell hydrogen powered vehicle as claimed in claim 1, wherein: the vehicle controller is also connected with an accelerator pedal and a brake pedal through a signal acquisition line and is used for controlling the vehicle to advance and stop.

6. The ramp assist system of a hydrogen fuel cell hydrogen powered vehicle as claimed in claim 1, wherein: and the vehicle control unit also comprehensively calculates the discharging power required by the vehicle according to the residual electric quantity and the residual hydrogen quantity of the power battery system and then sends the discharging power to the fuel battery system and the power battery system, and the fuel battery system and the power battery system provide the power required by the vehicle.

7. The ramp assist system of a hydrogen fuel cell hydrogen-powered vehicle as claimed in claim 6, wherein: the formula of the comprehensive calculation is as follows: p is a × P1+ B × P2, where P represents the discharge power required by the vehicle, P1 represents the maximum discharge power of the power battery system, P2 represents the maximum discharge power of the fuel cell system, a is a coefficient obtained after dynamic adjustment according to the remaining amount of power battery system, and B is a coefficient obtained after dynamic adjustment according to the remaining amount of hydrogen.

8. The ramp assist system of a hydrogen fuel cell hydrogen powered vehicle as claimed in claim 1, wherein: and the whole vehicle controller transmits the target torque in a CAN message mode.

Technical Field

The invention relates to the field of hydrogen energy automobiles, in particular to a ramp auxiliary system of a hydrogen fuel cell hydrogen energy automobile.

Background

In actual life, backward slipping during hill starting brings huge potential safety hazards, and with large-scale commercial use of hydrogen energy fuel cell hydrogen energy automobiles, a hill starting auxiliary method capable of preventing the hill starting from backward slipping is forced to be applied to the hydrogen fuel cell hydrogen energy automobiles.

Disclosure of Invention

In order to solve the problems, the invention provides a ramp auxiliary system of a hydrogen energy automobile with a hydrogen fuel cell, which is simple and reliable, has strong practicability and can be realized by upgrading the VCU software function without increasing the hardware cost of the whole automobile. The ramp assist system mainly includes: the system comprises a vehicle control unit, a fuel cell system, a power cell system, a driving motor controller, a driving motor, a distribution box and an anti-lock braking system, wherein the vehicle control unit is connected with the fuel cell system, the power cell system, the driving motor controller and the anti-lock braking system through communication signal lines;

dividing a torque F required for maintaining the vehicle to stay on the slope into two parts, wherein one part calibrates a corresponding torque F1 of a driving motor according to a current slope value and a vehicle load condition, the other part calibrates a torque F2 regulated according to a real-time PI of the rotating speed of the driving motor, and F1+ F2 is F, wherein F is a target torque which can finally maintain the vehicle to stay on the slope;

the target torque is transmitted to the driving motor controller by the vehicle controller, and the driving motor controller controls the motor to execute the target torque, so that a ramp auxiliary function is realized, and the vehicle can be used for preventing the vehicle from sliding backwards when starting on a ramp.

Further, the power battery system comprises a battery management system.

Further, the fuel cell system comprises a fuel cell management system.

Further, the anti-lock brake system is used for collecting wheel speed signals of each wheel.

Furthermore, the vehicle controller is connected with an accelerator pedal and a brake pedal through a signal acquisition line and is used for controlling the vehicle to move forward and stop.

Further, the vehicle control unit comprehensively calculates the discharging power required by the vehicle according to the residual electric quantity and the residual hydrogen quantity of the power battery system and then sends the discharging power to the fuel cell system and the power battery system, and the fuel cell system and the power battery system provide the electricity required by the vehicle.

Further, the formula of the comprehensive calculation is as follows: p is a P1+ B P2, where P represents the discharge power required by the vehicle, P1 represents the maximum discharge power of the power battery system, P2 represents the maximum discharge power of the fuel cell system, and a and B are coefficients obtained by common dynamic adjustment according to the remaining amount of power battery system and the remaining amount of hydrogen.

Further, the transmission of the target torque by the vehicle control unit is realized in a CAN message mode.

The technical scheme provided by the invention has the beneficial effects that: the problem that the hydrogen fuel cell automobile slips after starting on a slope is solved, and the hydrogen fuel cell automobile can be realized only by upgrading VCU software on the basis of not increasing the hardware cost of the whole automobile, so that the application cost is low.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a block diagram of a ramp assist system of a hydrogen fuel cell hydrogen powered vehicle according to an embodiment of the present invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

The embodiment of the invention provides a ramp auxiliary system of a hydrogen fuel cell hydrogen energy automobile.

Referring to fig. 1, fig. 1 is a structural diagram of a ramp assisting system of a hydrogen-fuel cell hydrogen-powered vehicle according to an embodiment of the present invention, which specifically includes:

the Vehicle Control Unit (VCU) is connected with a fuel cell system, a power cell system, a driving Motor Controller (MCU) and an anti-lock brake system (ABS) through communication signal lines, the anti-lock brake system can be used for collecting wheel speed signals of each wheel, an inclination angle sensor is arranged in the vehicle control unit and used for collecting gradient information, and the vehicle control unit is further connected with an accelerator pedal and a brake pedal through collecting signal lines. The fuel cell system, the power cell system and the driving Motor Controller (MCU) are connected with the high-voltage distribution box through high-voltage wires, the driving Motor Controller (MCU) is further connected with the driving motor (M) through the high-voltage wires, the power cell system comprises a Battery Management System (BMS), and the fuel cell system comprises a fuel cell management system. The vehicle controller is also connected with an accelerator pedal and a brake pedal through a signal acquisition line and is used for controlling the vehicle to advance and stop.

The torque F required for maintaining the vehicle to stay on the slope is divided into two parts, one part calibrates the corresponding motor torque F1 according to the slope and the vehicle load condition, the other part regulates the torque F2 according to the motor rotating speed in real time PI, and the superposition of the two parts of torques is the target torque which can finally maintain the vehicle to stay on the slope, namely F1+ F2. Because the driving motor is in a locked-rotor state in the slope stopping process, in order to prevent the locked-rotor of the driving motor from burning out, the maximum output time T of the target torque for maintaining the slope stopping process is set according to the performance of the driving motor. The motor rotating speed can be obtained by carrying out speed ratio conversion on the collected wheel speed signals and can also be directly obtained by the driving motor controller, the motor rotating speed obtained by directly collecting the motor rotating speed sensor of the driving motor controller is preferentially used, and when the motor rotating speed sensor of the driving motor controller breaks down, the motor rotating speed obtained by carrying out speed ratio conversion on the collected wheel speed signals is adopted.

The target torque is comprehensively calculated by a Vehicle Control Unit (VCU) according to the current gradient value, the load size and the motor rotating speed and then sent to a driving Motor Controller (MCU) for execution, and meanwhile, the discharging power required by the vehicle is comprehensively calculated according to the residual electric quantity and the residual hydrogen quantity of the power battery and then sent to a fuel battery system and a power battery system. The formula of the comprehensive calculation is as follows: p is a P1+ B P2, where P represents the discharge power required by the vehicle, P1 represents the maximum discharge power of the power battery system, P2 represents the maximum discharge power of the fuel cell system, and a and B are coefficients obtained by common dynamic adjustment according to the remaining amount of power battery system and the remaining amount of hydrogen.

The target torque is increased according to the gradual reduction of the depth of the brake pedal, and when the brake pedal is completely released, the vehicle is parked on the slope in place by adjusting the magnitude of F2 through PI. And in the output process of the hill start target torque F, the vehicle controller responds to the accelerator pedal to output torque. And the whole vehicle controller transmits the target torque in a CAN message mode.

The residual amount of hydrogen is similar to the residual electric quantity of the battery, and the hydrogen is used for predicting the endurance mileage of the vehicle, and reminding a driver of supplementing hydrogen in time when the residual amount is too low.

The invention has the beneficial effects that: the problem that the hydrogen fuel cell automobile slips after starting on a slope is solved, and the hydrogen fuel cell automobile can be realized only by upgrading VCU software on the basis of not increasing the hardware cost of the whole automobile, so that the application cost is low.

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