阅读说明：本技术 氢能汽车水进与空进压差实现运行平稳的优化系统及方法 (Optimization system and method for realizing stable operation of water inlet and air inlet pressure difference of hydrogen energy automobile ) 是由 李昌泉 郝义国 魏永琪 于 2020-12-29 设计创作，主要内容包括：本发明公开了氢能汽车水进与空进压差实现运行平稳的优化系统及方法,包括设定阶段和调整阶段,所述设定阶段包括空气入口压力监测模块、FCU模块和水泵开度查找模块,所述空气入口压力监测模块的信息输出端与FCU模块连接,且FCU模块的信息输出端与水泵开度查找模块连接,所述调整阶段包括冷却液入口压力监测模块和水泵开度调整模块；所述空气入口压力监测模块,用于监测空气入口压力；所述水泵开度查找模块,用于查找当前水泵的开度。该氢能汽车水进与空进压差实现运行平稳的优化系统及方法,通过控制燃料电池系统中两大重要参数之间的差值范围,避免水循环/空气侧压力过大,对另一侧的管道空间造成无法挽回的损害。(The invention discloses an optimization system and a method for realizing stable operation of a water inlet and air inlet pressure difference of a hydrogen energy automobile, wherein the optimization system comprises a setting stage and an adjusting stage, the setting stage comprises an air inlet pressure monitoring module, an FCU (fiber channel unit) module and a water pump opening searching module, the information output end of the air inlet pressure monitoring module is connected with the FCU module, the information output end of the FCU module is connected with the water pump opening searching module, and the adjusting stage comprises a cooling liquid inlet pressure monitoring module and a water pump opening adjusting module; the air inlet pressure monitoring module is used for monitoring air inlet pressure; and the water pump opening searching module is used for searching the opening of the current water pump. The system and the method for optimizing the stable operation of the hydrogen energy automobile by the pressure difference between the water inlet and the air inlet avoid irreparable damage to the pipeline space on the other side caused by overlarge water circulation/air side pressure by controlling the difference range between two important parameters in the fuel cell system.)

1. The hydrogen energy automobile water advances and advances the optimizing system that the pressure difference realizes the steady operation with empty, including setting for the stage and adjusting the stage, its characterized in that: the setting stage comprises an air inlet pressure monitoring module, an FCU module and a water pump opening searching module, the information output end of the air inlet pressure monitoring module is connected with the FCU module, the information output end of the FCU module is connected with the water pump opening searching module, and the adjusting stage comprises a cooling liquid inlet pressure monitoring module and a water pump opening adjusting module;

the air inlet pressure monitoring module is used for monitoring air inlet pressure;

the water pump opening searching module is used for searching the opening of the current water pump;

the air inlet pressure monitoring module is used for monitoring the inlet pressure of the cooling liquid;

the water pump opening adjusting module is used for reducing the opening of the water pump when the difference between the air inlet pressure and the cooling liquid inlet pressure is not more than 0; and when the difference between the air inlet pressure and the cooling liquid inlet pressure is greater than 0 and the difference between the air inlet pressure and the cooling liquid inlet pressure is greater than 10KPa, the opening degree of the water pump is increased.

2. The optimization system for realizing smooth running of the water inlet and air inlet pressure difference of the hydrogen energy automobile according to claim 1, is characterized in that: the air inlet pressure monitoring module monitors by adopting an air pressure sensor.

3. The optimization system for realizing smooth running of the water inlet and air inlet pressure difference of the hydrogen energy automobile according to claim 1, is characterized in that: and the cooling liquid inlet pressure monitoring module adopts a water pressure sensor for monitoring.

4. The optimization system for realizing smooth running of the water inlet and air inlet pressure difference of the hydrogen energy automobile according to claim 1, is characterized in that: and the air inlet pressure monitored by the air inlet pressure monitoring module and the cooling liquid inlet pressure monitored by the cooling liquid inlet pressure monitoring module are in a normal state when the difference between the air inlet pressure and the cooling liquid inlet pressure is not more than 5 kpa.

5. The method for realizing the optimized system for smooth operation of the water inlet and air inlet pressure difference of the hydrogen energy automobile according to the claims 1-4, characterized in that: the method for optimizing the system comprises the following steps: and controlling the opening degree of the water pump according to the difference between the cooling liquid inlet pressure and the air inlet pressure of the air supply subsystem.

Technical Field

The invention relates to the technical field of hydrogen energy automobiles, in particular to an optimization system and method for realizing stable operation of a hydrogen energy automobile by water inlet and air inlet pressure difference.

Background

In the practical construction of the fuel cell, the pipeline of the cooling liquid circulation is close to the air pipeline, which is the principle that the temperature is stable for controlling the operation of the fuel cell, the construction also causes the pressure on two sides to have a large influence on the space of the respective pipeline, and the pressure on one side is excessive, so that the possibility of extruding the other side is increased, and irreparable damage is caused.

Disclosure of Invention

The invention aims to provide an optimization system and method for realizing stable operation of a water inlet pressure difference and an air inlet pressure difference of a hydrogen energy automobile, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the optimization system and the method for realizing stable operation of the water inlet and air inlet pressure difference of the hydrogen energy automobile comprise a setting stage and an adjusting stage, wherein the setting stage comprises an air inlet pressure monitoring module, an FCU (fiber channel unit) module and a water pump opening searching module, the information output end of the air inlet pressure monitoring module is connected with the FCU module, the information output end of the FCU module is connected with the water pump opening searching module, and the adjusting stage comprises a cooling liquid inlet pressure monitoring module and a water pump opening adjusting module;

the air inlet pressure monitoring module is used for monitoring air inlet pressure;

the water pump opening searching module is used for searching the opening of the current water pump;

the air inlet pressure monitoring module is used for monitoring the inlet pressure of the cooling liquid;

the water pump opening adjusting module is used for reducing the opening of the water pump when the difference between the air inlet pressure and the cooling liquid inlet pressure is not more than 0; and when the difference between the air inlet pressure and the cooling liquid inlet pressure is greater than 0 and the difference between the air inlet pressure and the cooling liquid inlet pressure is greater than 10KPa, the opening degree of the water pump is increased.

Preferably, the air inlet pressure monitoring module monitors by using an air pressure sensor.

Preferably, the cooling liquid inlet pressure monitoring module is monitored by a water pressure sensor.

Preferably, the air inlet pressure monitoring module monitors the difference between the air inlet pressure and the cooling liquid inlet pressure monitoring module is in a normal state when the difference is not greater than 5kpa, and the opening degree of the water pump does not need to be adjusted.

Preferably, the method for optimizing the system is as follows: and controlling the opening degree of the water pump according to the difference between the cooling liquid inlet pressure and the air inlet pressure of the air supply subsystem.

Compared with the prior art, the invention has the beneficial effects that: the system and the method for optimizing the stable operation of the water inlet and air inlet pressure difference of the hydrogen energy automobile are based on the difference between the cooling liquid inlet pressure of a water-cooling type fuel cell waterway circulation subsystem and the air inlet pressure of an air supply subsystem, the pressure difference is used for judging to realize the closed-loop optimization control of a fuel cell control system, the condition that the water circulation/air side pressure is too large and irretrievable damage is caused to the pipeline space on the other side is avoided by controlling the difference range between two important parameters in the fuel cell system, the difference between the cooling liquid inlet pressure and the air inlet pressure is within a reasonable range, and the air side is higher than the waterway circulation side to well take away redundant heat.

Drawings

FIG. 1 is a schematic structural diagram of an optimization system and method for achieving stable operation of a hydrogen energy automobile by means of water inlet and air inlet pressure difference;

FIG. 2 is a schematic diagram of the work flow of the setting stage of the optimization system and method for achieving stable operation of the water inlet and air inlet pressure difference of the hydrogen energy automobile;

FIG. 3 is a schematic diagram of the work flow of the adjustment phase of the optimization system and method for achieving stable operation of the hydraulic inlet and air inlet pressure difference of the hydrogen energy automobile;

FIG. 4 is a schematic diagram of the work flow structure of the setting stage of the optimization system and method for achieving stable operation of the water inlet and air inlet pressure difference of the hydrogen energy automobile according to the invention;

FIG. 5 is a schematic diagram of the work flow structure of the adjustment phase of the optimization system and method for achieving stable operation of the water inlet and air inlet pressure difference of the hydrogen energy automobile.

In the figure: 1. an air inlet pressure monitoring module; 2. an FCU module; 3. a water pump opening searching module; 4. a coolant inlet pressure monitoring module; 5. and a water pump opening degree adjusting module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: the optimization system and the method for realizing stable operation of the water inlet and air inlet pressure difference of the hydrogen energy automobile comprise a setting stage and an adjusting stage, wherein the setting stage comprises an air inlet pressure monitoring module 1, an FCU (fiber channel unit) module 2 and a water pump opening searching module 3, the information output end of the air inlet pressure monitoring module 1 is connected with the FCU module 2, the information output end of the FCU module 2 is connected with the water pump opening searching module 3, and the adjusting stage comprises a cooling liquid inlet pressure monitoring module 4 and a water pump opening adjusting module 5; maintaining fuel cell coolant inlet pressure P at all times between system controls_wateFollowing the air inlet pressure P_airThe difference between the two is 3kpa (air inlet pressure P)_airGreater than coolant inlet pressure P_water) Setting a cooling liquid inlet pressure value according to an air pressure value required under the current working density of the fuel cell so as to send a set value of the current water pump opening, wherein an air inlet pressure monitoring module 1 adopts an air pressure sensor to monitor the air inlet pressure, and a cooling liquid inlet pressure monitoring module 4 adopts a water pressure sensor to monitor the cooling liquid inlet pressure; the water pump opening searching module 3 is used for searching the opening of the current water pump; the water pump opening adjusting module 5 is used for reducing the water pump opening when the difference of the air inlet pressure minus the cooling liquid inlet pressure is not more than 0; in the airAnd when the difference between the port pressure and the cooling liquid inlet pressure is greater than 0 and the difference between the air inlet pressure and the cooling liquid inlet pressure is greater than 10KPa, the opening degree of the water pump is increased.

The method for optimizing the system is as follows: according to coolant inlet pressure P_waterAnd air inlet pressure P of the air supply subsystem_airControlling the opening of the water pump based on the difference;

in the adjustment measure, a judgment module for the pressure difference between the two is added in the software of the control system, and the inlet pressure P of the cooling liquid is acquired in real time based on data_waterAnd air inlet pressure P_airFirst, the two are made a difference, the inlet pressure P of the cooling liquid_waterHigher than or equal to the air inlet pressure P_airIn the meantime, the opening degree of the water pump is reduced, and the pressure P of the cooling liquid inlet is reduced_water(ii) a At low current density (less than 0.8A/cm)²) In this case, the air inlet pressure P_airMinus coolant inlet pressure P_waterWhen the difference is greater than 0 and greater than 10kpa, the opening of the water pump needs to be increased to increase the coolant inlet pressure P_water(ii) a Air inlet pressure P_airMinus coolant inlet pressure P_waterWhen the difference is larger than 0 and within 5kpa, the normal working state is achieved, and the opening degree of the water pump at the moment is not required to be adjusted.

The invention is based on the cooling liquid inlet pressure P of the water-cooling type fuel cell waterway circulation subsystem_waterAnd air inlet pressure P of the air supply subsystem_airThe difference between the pressures is used as a judgment to realize the closed-loop optimization control of the fuel cell control system, and the situation that the pipeline space on the other side is irreparably damaged due to overlarge pressure of the water circulation/air side is avoided by controlling the difference range between two important parameters in the fuel cell system.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.