Fuel cell water pump and electronic fan cooperative control system and method

Abstract

The application discloses a fuel cell water pump and electronic fan cooperative control system, which comprises a fuel cell system, a water pump, an electromagnetic three-way valve and a fuel cell radiator; one end of the fuel cell system is communicated with the electromagnetic three-way valve through the water pump, and the other end of the fuel cell system is communicated with the fuel cell radiator; a first interface of the electromagnetic three-way valve is communicated with the water pump, a second interface of the electromagnetic three-way valve is communicated with the fuel cell radiator, and a third interface of the electromagnetic valve is communicated with the fuel cell system; and the fuel cell radiator is provided with an electronic fan correspondingly. The electromagnetic three-way valve is arranged, the electromagnetic three-way valve is used for adjusting the cooling liquid flow through the fuel cell radiator, and therefore the energy consumption is saved as much as possible.

Description

Technical Field

[0001] This invention belongs to the field of automotive energy conservation, specifically relating to a coordinated control system and method for a fuel cell water pump and an electronic fan. Background Technology

[0002] As a highly efficient and clean energy source, fuel cell commercial vehicles have become an important component of new energy commercial vehicles. Precise temperature control of fuel cells is crucial for maximizing their performance and extending their lifespan. Currently, the electric fan and water pump in fuel cells are controlled independently, without information exchange or control strategies. This leads to problems such as large temperature fluctuations in the fuel cell stack and slow response speed of the thermal management subsystem during load changes. To address the temperature fluctuation issue during load changes, coordinated control of the electric fan and water pump is needed to reduce stack temperature fluctuations and improve the response speed of the thermal management subsystem. This control method provides a solution for controlling the fuel cell engine system under load conditions. Summary of the Invention

[0003] The purpose of this invention is to provide a coordinated control system and method for a fuel cell water pump and an electric fan. The system employs a coordinated control scheme for the electric fan and the water pump. The water pump uses a speed control strategy to adjust the pump speed according to the output power of the fuel cell. The electric fan uses stepless speed control to precisely control the heat dissipation of the fuel cell, ensuring that the fuel cell operates at the optimal operating temperature and improving the performance and lifespan of the fuel cell.

[0004] To address the aforementioned problems in the existing technology, the technical solution adopted by this invention is as follows:

[0005] A fuel cell water pump and electric fan coordinated control system includes a fuel cell system, a water pump, a solenoid three-way valve, and a fuel cell radiator;

[0006] One end of the fuel cell system is connected to an electromagnetic three-way valve via a water pump, and the other end of the fuel cell system is connected to a fuel cell radiator.

[0007] The first port of the electromagnetic three-way valve is connected to the water pump, the second port of the electromagnetic three-way valve is connected to the fuel cell radiator, and the third port of the electromagnetic valve is connected to the fuel cell system.

[0008] The fuel cell radiator is equipped with an electric fan.

[0009] By installing an electromagnetic three-way valve, the flow rate of coolant through the fuel cell radiator can be adjusted, thereby saving energy as much as possible.

[0010] By setting up water pumps and electric fans, and adjusting them for different operating conditions, the water pumps and electric fans can be controlled to work together to improve cooling efficiency.

[0011] A method for coordinated control of a fuel cell water pump and an electric fan includes the following steps:

[0012] Step 1: Obtain ambient temperature, fuel cell output power, ambient temperature, fuel cell inlet water temperature, and fuel cell outlet temperature;

[0013] Step 2: Adjust the water pump speed, the opening degree of the solenoid three-way valve, and the speed of the electric fan according to the battery output power, the inlet water temperature of the fuel cell, and the outlet temperature of the fuel cell.

[0014] This control method mainly uses the coordinated operation of water pumps and electric fans to meet the needs of different operating conditions, enabling the fuel cell system to be cooled with low energy consumption.

[0015] Furthermore, step 2 includes: when the fuel cell is operating normally, the water pump controls its speed according to the current output power of the fuel cell. When the inlet water temperature of the fuel cell approaches the set operating temperature for the current power of the fuel cell, the cooling system controller sends a control command to the electric fan. The electric fan speed is controlled according to the set MAP curve. When the fuel cell power remains unchanged but there is a difference between the actual inlet water temperature and the target water temperature, the water pump maintains its speed unchanged, and the speed of the fuel cell electric fan is adjusted through PID regulation, thereby achieving precise control of the fuel cell operating temperature.

[0016] Furthermore, step 2 includes: when the fuel cell is in a low-temperature environment, controlling the opening of the electromagnetic three-way valve, adjusting the flow rate of coolant passing through the fuel cell radiator, reducing the heat dissipation of the cooling system, and simultaneously adjusting the speed of the electric fan according to the fuel cell power and inlet water temperature, thereby reducing the energy consumption of the entire vehicle and enabling the fuel cell to quickly reach the optimal operating temperature in a low-temperature environment.

[0017] Furthermore, step 2 includes: adjusting the speed of the water pump and the electric fan according to the fuel cell output power and the feedback fuel cell inlet water temperature, wherein the water pump speed is related to the fuel cell output power and the inlet and outlet water temperatures, the cooling electric fan speed is adjusted according to the fuel cell power and the inlet water temperature, and the coolant flow rate is controlled to achieve precise control of the fuel cell water temperature.

[0018] Furthermore, step 2 includes: when the fuel cell power changes, adjusting the water pump speed first according to the fuel cell power and the water pump speed MAP, and performing PID control on the water pump speed according to the inlet and outlet water temperatures. At the same time, adjusting the speed of the cooling electronic fan according to the fuel cell output power, inlet water temperature and coolant flow rate to achieve precise control of the fuel cell water temperature.

[0019] The beneficial effects of this invention are as follows: by controlling the fuel cell output power and the fuel cell inlet water temperature, and by coordinating the control of the water pump and the electric fan, the fuel cell operating temperature is precisely controlled, reducing stack temperature fluctuations, improving the response speed of the thermal management subsystem, thereby improving fuel cell efficiency and reducing the overall vehicle hydrogen consumption. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a control principle diagram of the present invention.

[0022] In the diagram: 1-Fuel cell system; 2-Water pump; 3-Solenoid three-way valve; 4-Fuel cell radiator; 5-Electric fan. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and reference numerals.

[0024] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] The terms “first,” “second,” “third,” etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] Example 1:

[0029] like Figure 1 As shown, a fuel cell water pump and electric fan coordinated control system includes a fuel cell system 1, a water pump 2, an electromagnetic three-way valve 3, and a fuel cell radiator 4.

[0030] One end of the fuel cell system 1 is connected to the electromagnetic three-way valve 3 via the water pump 2, and the other end of the fuel cell system 1 is connected to the fuel cell radiator 4.

[0031] The first port of the electromagnetic three-way valve 3 is connected to the water pump 2, the second port of the electromagnetic three-way valve 3 is connected to the fuel cell radiator 4, and the third port of the electromagnetic valve is connected to the fuel cell system 1.

[0032] The fuel cell radiator 4 is equipped with an electric fan 5.

[0033] By setting up an electromagnetic three-way valve 3, the flow rate of coolant through the fuel cell radiator 4 can be adjusted, thereby saving energy consumption as much as possible.

[0034] By setting up water pump 2 and electric fan 5, and adjusting them for different operating conditions, the water pump 2 and electric fan 5 can be controlled to work together to improve cooling efficiency.

[0035] Example 2:

[0036] like Figure 2 As shown, a method for coordinated control of a fuel cell water pump and an electric fan includes the following steps:

[0037] Step 1: Obtain ambient temperature, fuel cell output power, ambient temperature, fuel cell inlet water temperature, and fuel cell outlet temperature;

[0038] Step 2: Adjust the speed of water pump 2, the opening degree of electromagnetic three-way valve 3, and the speed of electric fan 5 according to the battery output power, fuel cell inlet water temperature, and fuel cell outlet temperature.

[0039] This control method mainly uses the coordinated operation of water pump 2 and electric fan 5 to meet the needs of different operating conditions, enabling it to cool the fuel cell system 1 with low energy consumption.

[0040] Example 3:

[0041] Based on Example 2, step 2 includes: when the fuel cell is operating normally, the water pump 2 controls its speed according to the current output power of the fuel cell system. When the fuel cell inlet water temperature is within ±5℃ of the fuel cell's current power set operating temperature, the cooling system controller sends a control command to the electric fan 5. The speed of the electric fan 5 is controlled according to the set MAP curve. When the fuel cell power remains constant but the difference between the actual inlet water temperature and the target water temperature exceeds 2℃, the water pump 2 maintains its speed setting (the water pump speed is divided into 10 levels), and the speed of the fuel cell electric fan 5 is adjusted through PID regulation, thereby achieving precise control of the fuel cell operating temperature.

[0042] Example 4:

[0043] Based on Example 2, step 2 includes: when the fuel cell is in a low-temperature environment (below 0°C), controlling the opening degree of the electromagnetic three-way valve 3 (the opening degree is related to the fuel cell operating temperature and the ambient temperature), adjusting the flow rate of coolant passing through the fuel cell radiator 4, reducing the heat dissipation of the cooling system, and simultaneously adjusting the speed of the electric fan 5 according to the fuel cell power and the inlet water temperature, thereby reducing the energy consumption of the entire vehicle and enabling the fuel cell to quickly reach the optimal operating temperature in a low-temperature environment.

[0044] Example 5:

[0045] Based on Example 2, step 2 includes: adjusting the speed of water pump 2 and electric fan 5 according to the fuel cell output power and the feedback fuel cell inlet water temperature, wherein the speed of water pump 2 is related to the fuel cell output power and the inlet and outlet water temperatures, the speed of cooling electric fan 5 is adjusted according to the fuel cell power and inlet water temperature, and the coolant flow rate is controlled to achieve precise control of fuel cell water temperature.

[0046] Example 6:

[0047] Based on Example 2, step 2 includes: when the fuel cell power changes, adjusting the speed of the water pump 2 according to the fuel cell power and the MAP of the water pump 2, and performing PID control on the speed of the water pump 2 according to the inlet and outlet water temperatures, while adjusting the speed of the cooling electronic fan 5 according to the fuel cell output power, the inlet water temperature and the coolant flow rate, so as to achieve precise control of the fuel cell water temperature.

[0048] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. A coordinated control system for a fuel cell water pump and an electric fan, characterized in that: Includes a fuel cell system (1), a water pump (2), a solenoid three-way valve (3), and a fuel cell radiator (4); One end of the fuel cell system (1) is connected to the electromagnetic three-way valve (3) via the water pump (2), and the other end of the fuel cell system (1) is connected to the fuel cell radiator (4); The first port of the electromagnetic three-way valve (3) is connected to the water pump (2), the second port of the electromagnetic three-way valve (3) is connected to the fuel cell radiator (4), and the third port of the electromagnetic valve is connected to the fuel cell system (1). The fuel cell radiator (4) is equipped with an electric fan (5).

2. A method for coordinated control of a fuel cell water pump and an electric fan, characterized in that, Includes the following steps: Step 1: Obtain ambient temperature, fuel cell output power, ambient temperature, fuel cell inlet water temperature, and fuel cell outlet temperature; Step 2: Adjust the gear of the water pump (2), the opening degree of the solenoid three-way valve (3), and the speed of the electric fan (5) according to the battery output power, the inlet water temperature of the fuel cell, and the outlet temperature of the fuel cell.

3. The method for coordinated control of fuel cell water pump and electric fan according to claim 2, characterized in that: Step 2 includes: when the fuel cell is working normally, the water pump (2) controls the gear according to the current output power of the fuel cell system (1). When the fuel cell inlet water temperature is within ±5℃ of the current power setting operating temperature of the fuel cell, the cooling system controller sends a control command to the electronic fan (5) and controls the speed of the electronic fan (5) according to the set MAP curve. When the fuel cell power remains unchanged but the difference between the actual inlet water temperature and the target water temperature exceeds 2℃, the water pump 2 keeps the gear unchanged and adjusts the speed of the fuel cell electronic fan (5) through PID regulation.

4. The method for coordinated control of fuel cell water pump and electric fan according to claim 2, characterized in that: Step 2 includes: when the fuel cell is in a low temperature environment, controlling the opening of the electromagnetic three-way valve (3) to adjust the flow rate of the coolant passing through the fuel cell radiator (4), and simultaneously adjusting the speed of the electronic fan (5) according to the fuel cell power and the inlet water temperature.

5. The method for coordinated control of fuel cell water pump and electric fan according to claim 2, characterized in that: Step 2 includes: adjusting the speed of the water pump (2) and the electric fan (5) according to the output power of the fuel cell and the feedback of the fuel cell inlet water temperature, wherein the speed of the water pump (2) is related to the output power of the fuel cell and the inlet and outlet water temperatures, and the speed of the cooling electric fan (5) is adjusted according to the fuel cell power and the inlet water temperature.

6. The method for coordinated control of fuel cell water pump and electric fan according to claim 2, characterized in that: Step 2 includes: when the fuel cell power changes, the speed of the water pump (2) is adjusted first according to the fuel cell power and the gear MAP of the water pump (2), and the speed of the water pump (2) is controlled by PID according to the inlet and outlet water temperatures. At the same time, the speed of the cooling electronic fan (5) is adjusted according to the fuel cell output power, the inlet water temperature and the coolant flow rate.

Images