CN213212194U

CN213212194U - A new gas flow control system for fuel cell vehicles

Info

Publication number: CN213212194U
Application number: CN202022358489.3U
Authority: CN
Inventors: 武志涛; 魏东; 王介生; 苏晓英; 蔡昌友
Original assignee: University of Science and Technology Liaoning USTL
Current assignee: University of Science and Technology Liaoning USTL
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-05-14
Anticipated expiration: 2030-10-21

Abstract

The utility model provides a gas flow control system for a novel fuel cell vehicle; the gas flow control system is divided into three parts: data acquisition, data processing and mechanical control; the data acquisition part consists of a rotational speed sensor, a current sensor and a voltage sensor. It is composed of sensors, which are used to collect the rotational speed, current and fuel cell voltage of the in-wheel motor; the data processing part is a PLC controller, which is used for data processing and control, performs numerical analysis on the collected signals and sends the control signals to the electric control part The electrical control part includes a first regulator and a second regulator, which are used to control the gas flow of the fuel cell according to the control command, so as to realize the gas flow control of the fuel cell; the system can adjust the fuel in time according to the power output of the fuel cell vehicle. The output power of the battery greatly improves the air flow control accuracy and response speed, reduces the power regulation requirement of the power battery, and prolongs the service life of the fuel cell.

Description

Novel gas flow control system of fuel cell automobile

Technical Field

The utility model belongs to the automatic control field, concretely relates to novel gas flow control system of fuel cell car.

Background

The hydrogen fuel cell automobile generates electric energy by utilizing the electrochemical reaction of hydrogen and oxygen, so that a motor is driven to rotate, and the electric automobile obtains kinetic energy. Taking a proton exchange membrane fuel cell as an example, a solid polymer is used as an electrolyte membrane, air is used as an oxidant, hydrogen is used as fuel gas, and a bipolar plate adopts graphite of a gas flow channel or a metal plate subjected to surface modification. At the anode, hydrogen loses electrons under the action of a catalyst to generate hydrogen positive ions (also called protons), and a proton exchange membrane of the fuel cell promotes the hydrogen positive ions to be transferred from the anode to the cathode; at the cathode, oxygen in the air obtains electrons on the surface of the catalyst to form negative ions, and the negative ions and the positive hydrogen ions transferred from the anode to the cathode are subjected to chemical reaction to generate water, and the water is discharged together with residual unreacted tail gas through the gas diffusion layer. Therefore, when the hydrogen fuel cell is operated, it is necessary to proportionally supply hydrogen gas and air (oxygen gas) to the fuel cell in real time, and at the same time, discharge water generated by the reaction, and adjust the supply amount of the fuel gas and the oxidant gas according to the power output requirement of the fuel cell, so as to improve the use efficiency of the fuel cell.

The hydrogen fuel cell control system requires precise coordination of cathode oxygen content and anode hydrogen content. When the power required by the whole vehicle changes along with the external environment, the following change of the air-fuel ratio required by the fuel cell in the hydrogen fuel cell system also occurs. An electric control regulating valve in the hydrogen supply system controls the flow rate of hydrogen entering the fuel cell, and if the control precision of the hydrogen flow rate is poor, the output power of the fuel cell fluctuates. How to adjust the flow of hydrogen and oxygen fed into the fuel cell in time to realize the quick dynamic response of the power output of the fuel cell, and implement high-efficiency control according to the power demand of a hydrogen fuel cell automobile is a great hotspot in the research field of the hydrogen fuel cell automobile at present, and has important significance for the popularization and the application of the hydrogen energy automobile. In addition, the efficient and reliable fuel cell can reduce the power compensation requirement of the power cell, reduce the capacity requirement of the power cell and lighten the reconditioning quality of the hydrogen fuel cell automobile, and has important significance for the popularization and the application of the hydrogen energy automobile.

SUMMERY OF THE UTILITY MODEL

In order to realize the high-efficient control of hydrogen fuel cell car gas flow, solve prior art's weak point, the utility model provides a novel fuel cell car gas flow control system and control method based on current detection to satisfy hydrogen fuel cell car development trend.

The technical scheme of the utility model as follows:

a gas flow control system of a novel fuel cell vehicle; the gas flow control system comprises a hub motor I, a motor controller I, a hub motor II, a motor controller II, a rotating speed sensor, a current sensor, a voltage sensor, a PLC (programmable logic controller), a first regulator, a second regulator, an air compressor, a hydrogen compressor, a fuel cell and a power cell; the current sensor is electrically connected with the hub motor I and the hub motor II and is used for acquiring current signals of the hub motor I and the hub motor II; the rotating speed sensor is electrically connected with the hub motor I and used for acquiring a rotating speed signal; the voltage sensor is electrically connected with the fuel cell and is used for collecting a voltage signal of the fuel cell; the PLC is electrically connected with the rotating speed sensor, the current sensor and the voltage sensor and is used for data processing and control; one end of the first regulator and one end of the second regulator are electrically connected with the PLC, and the other end of the first regulator and the second regulator are connected with the fuel cell and used for controlling the gas flow of the fuel cell according to the instruction of the controller; the air compressor is connected with the fuel cell and used for providing air required by power generation; the hydrogen compressor is connected with the fuel cell and is used for providing hydrogen energy required by power generation; the fuel cell is connected with the power cell in parallel, and provides power for the hub motor I and the hub motor II through the motor controller I and the motor controller II respectively.

The working principle is as follows: the fuel cell automobile gas flow control system is mainly divided into three parts of data acquisition, data processing and electrical control. The data acquisition part consists of a rotating speed sensor, a current sensor and a voltage sensor and is used for acquiring the rotating speed and current data of the hub motor and the output voltage of the fuel cell; the data processing part is the PLC controller and is used for processing and controlling data, carrying out numerical analysis on data acquisition signals and transmitting control signals to the electric control part; the electric control part comprises a first regulator and a second regulator, wherein a gas valve of the first regulator is connected with a fuel gas inlet, and a gas valve of the second regulator is connected with an oxidant gas inlet and is used for controlling and regulating the gas flow of the fuel cell according to the instruction of the controller, so that the automatic control of the gas flow of the fuel cell is realized.

Preferably, the current sensor is a hall current sensor and is used for detecting a three-phase current instantaneous value of the hub motor.

Preferably, the voltage sensor is a sliding resistor or a varistor box for detecting the output voltage of the fuel cell.

Preferably, the first regulator and the second regulator are divided into a driving circuit and an electric valve; the drive circuit is used for receiving a control signal of the PLC and outputting the control signal to the electric valve; the electrically operated valve performs a relevant operation in accordance with a control signal, thereby controlling the opening degree of the valve.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses utilize hall current sensor to carry out fuel cell automobile wheel hub motor three-phase current and detect, it is high to power take off's real-time detection degree of accuracy to have, fault rate low grade advantage.

(2) The utility model discloses combine together electrical detection control unit and mechanical control part, when power adjustment appears in the fuel cell car, can realize the automatic control of fuel gas, oxidant gas, degree of automation is high, and control is accurate.

(3) The utility model discloses having improved the gaseous flow control precision of fuel cell greatly, having realized fuel cell to the real-time response of power demand, intelligent control reduces power battery power compensation demand, reduces power battery capacity demand, alleviates the quality of readiness of fuel cell car.

Drawings

Fig. 1 is a schematic structural diagram of a gas flow control system of a novel fuel cell vehicle according to the present invention;

fig. 2 is a schematic structural diagram of the first adjuster and the second adjuster of the present invention.

Detailed Description

In order to further understand the structure, characteristics and other objects of the present invention, the following detailed description is provided with reference to the attached drawings of the preferred embodiments, which are only used for illustrating the technical solution of the present invention and are not limited to the present invention.

First, as shown in fig. 1, a schematic structural diagram of a gas flow control system of a novel fuel cell vehicle according to the present invention is shown. The gas flow control system comprises three parts, namely data acquisition, data processing and electrical control; the data acquisition part consists of a rotating speed sensor, a current sensor and a voltage sensor and is used for acquiring rotating speed, current and voltage signals; the data processing part is a PLC controller and is used for data processing and control; the electrical control part is arranged in the first regulator and the second regulator and is used for controlling and regulating the gas flow of the fuel cell according to the output instruction of the PLC controller, thereby realizing the automatic control of the gas flow of the fuel cell.

The data acquisition part comprises a rotating speed sensor, a current sensor and a voltage sensor; a rotating speed sensor of the data acquisition part acquires the current rotating speed of an automobile hub motor of the fuel cell; the current sensor of the data acquisition part is a Hall current sensor and is used for detecting the three-phase current instantaneous value of the hub motor and sending the three-phase current instantaneous value to the PLC; the voltage sensor of the data acquisition part is a sliding resistor or a variable resistance box, is connected across the anode and the cathode of the fuel cell and is used for detecting the output voltage of the fuel cell.

The data processing part is a gas flow controller based on a PLC technology, and the input end of the data processing part is respectively connected with the rotating speed, the current and the voltage signal of the data acquisition part.

The gas valve of the first regulator is connected with the fuel gas inlet, the gas valve of the second regulator is connected with the oxidant gas inlet, and the gas valve of the first regulator and the gas valve of the second regulator are used for controlling and regulating the gas flow of the fuel cell according to the instruction of the controller, so that the automatic control of the gas flow of the fuel cell is realized.

Referring to fig. 1, the gas flow control system of the fuel cell vehicle includes a hub motor i, a motor controller i, a hub motor ii, a motor controller ii, a rotation speed sensor, a current sensor, a voltage sensor, a PLC controller, a first regulator, a second regulator, an air compressor, a hydrogen compressor, a fuel cell, and a power cell; the current sensor is electrically connected with the hub motor I and the hub motor II and is used for acquiring current signals of the hub motor I and the hub motor II; the rotating speed sensor is electrically connected with the hub motor I and used for acquiring a rotating speed signal; the voltage sensor is electrically connected with the fuel cell and is used for collecting a voltage signal of the fuel cell; the PLC is electrically connected with the rotating speed sensor, the current sensor and the voltage sensor and is used for data processing and control; one end of the first regulator and one end of the second regulator are electrically connected with the PLC, and the other end of the first regulator and the second regulator are connected with the fuel cell and used for controlling the gas flow of the fuel cell according to the instruction of the controller; the air compressor is connected with the fuel cell and used for providing air required by power generation; the hydrogen compressor is connected with the fuel cell and is used for providing hydrogen energy required by power generation; the fuel cell is connected with the power cell in parallel, and provides power for the hub motor I and the hub motor II through the motor controller I and the motor controller II respectively. The motor controller I and the motor controller II are V6-H-2D 30G, produced by Shenzhen blue Haihe Corp.

As shown in fig. 2, the structure of the first and second regulators of the present invention is schematically illustrated. The first and second regulators include a drive circuit and an electrically operated valve, respectively. The drive circuit is used for receiving a control signal of the PLC and transmitting the control signal to the electric valve; and the electric valve performs related mechanical actions according to the control signal to control the opening of the air valve.

Finally, the utility model discloses a novel gas flow control system and operating method of fuel cell car, its concrete technical characterstic is as follows:

(1) the utility model discloses utilize hall current sensor to carry out fuel cell automobile wheel hub motor three-phase current and detect, have to power take off real-time detection degree of accuracy height, fault rate low grade advantage.

(3) The utility model discloses having improved the gaseous flow control precision of fuel cell greatly, having realized fuel cell to the real-time response of power demand, intelligent control reduces power battery power compensation demand, reduces power battery capacity demand, alleviates hydrogen fuel cell car and has a good deal of quality.

It should be noted that the above mentioned embodiments and embodiments are intended to demonstrate the practical application of the technical solution provided by the present invention, and should not be interpreted as limiting the scope of the present invention. Those skilled in the art should understand that they can practice the present invention within the spirit and principle of the present invention

Various modifications, equivalents, or improvements may be made. The protection scope of the present invention is subject to the appended claims.

Claims

1. A gas flow control system for a novel fuel cell vehicle, characterized in that the gas flow control system comprises in-wheel motor I, motor controller I, in-wheel motor II, motor controller II, rotational speed sensor, current sensor, voltage sensor, PLC controller, first regulator, second regulator, air compressor, hydrogen compressor, fuel cell and power battery; the current sensor is electrically connected to the hub motor I and hub motor II, to collect its current signal; the speed sensor is electrically connected to the hub motor I for collecting the speed signal; the voltage sensor is electrically connected to the fuel cell to collect its voltage signal; the PLC controls The controller is electrically connected to the rotational speed sensor, current sensor and voltage sensor for data processing and control; one end of the first regulator and the second regulator is electrically connected to the PLC controller, and the other end is electrically connected to the PLC controller. The air compressor is connected to the fuel cell and used to control the gas flow of the fuel cell according to the instructions of the controller; the air compressor is connected to the fuel cell to provide the air required for power generation; the hydrogen compressor is connected to the The fuel cell is connected to provide hydrogen energy required for power generation; the fuel cell is connected in parallel with the power battery, and the in-wheel motor I and the in-wheel motor are respectively connected through the motor controller I and the motor controller II. II provides power.

2 . The gas flow control system of a novel fuel cell vehicle according to claim 1 , wherein the current sensor is a Hall current sensor, which is used to detect the instantaneous value of the three-phase current of the in-wheel motor. 3 .

3 . The gas flow control system of a novel fuel cell vehicle according to claim 1 , wherein the voltage sensor is a sliding resistor or a varistor box, which is used to detect the output voltage of the fuel cell. 4 .

4 . The gas flow control system of a novel fuel cell vehicle according to claim 1 , wherein the first regulator and the second regulator are divided into two parts: a driving circuit and an electric valve; the driving circuit It is used to receive the control signal of the PLC controller and output the control signal to the electric valve; the electric valve performs relevant actions according to the control signal, thereby controlling the opening of the valve.