WO2024041087A1

WO2024041087A1 - Air intake system of fuel cell engine, thermal management method for fuel cell engine, and vehicle

Info

Publication number: WO2024041087A1
Application number: PCT/CN2023/098391
Authority: WO
Inventors: 祝浩; 郭丁伊; 徐家良; 刘加明; 尹建坤; 巴特
Original assignee: 中国第一汽车股份有限公司
Priority date: 2022-08-23
Filing date: 2023-06-05
Publication date: 2024-02-29
Also published as: CN115295831A

Abstract

Disclosed in the present application are an air intake system of a fuel cell engine, a thermal management method for a fuel cell engine, and a vehicle. The air intake system comprises: a first branch, a second branch, a third branch and a vehicle control unit, wherein an exhaust end of the first branch is in communication with an intake end of a fuel cell stack; the first branch comprises a PTC heater, a supercharger and a supercharging inter-cooling heat exchanger, which are in communication in sequence; an exhaust end of the second branch is in communication with a pipe that brings an outlet end of the PTC heater into communication with an inlet end of the supercharger; an intake end of the third branch is in communication with the pipe that brings the outlet end of the PTC heater into communication with the inlet end of the supercharger; and the vehicle control unit is used for determining a heating power of the PTC heater and a degree of opening of an outlet of the PTC heater. In the present application, the intake air heating requirement of a fuel cell engine and the heating requirement of an air conditioning system are both met using one PTC heater, which reduces the cost of an apparatus and the difficulty of maintenance of the apparatus compared with the provision of two PTC heaters.

Description

Air intake system, thermal management method and vehicle for fuel cell engine

Technical field

The present application relates to the technical field of fuel cell engines, specifically, to an air intake system, a thermal management method and a vehicle for a fuel cell engine. This application requests the priority of the patent application submitted to the State Intellectual Property Office of China on August 23, 2022, with the application number 202211012329.0 and the invention title "Air intake system, thermal management method and vehicle for fuel cell engine".

Background technique

Hydrogen fuel engines generate electricity through the oxidation reaction of hydrogen and oxygen in a certain ratio. Oxygen comes from the atmosphere. The power of hydrogen fuel engines depends on the amount of air supplied. When hydrogen and oxygen undergo an oxidation reaction inside a hydrogen fuel engine, the temperature of the air needs to be within a suitable range, so an intercooling system and a heating system are generally set up for the supercharged air.

The intake air heating solution for a fuel cell engine is generally to install a PTC heater in front of the electric turbocharger on the fuel cell air management line to heat the intake air when starting the fuel cell engine at low temperatures. At the same time, for the vehicle air conditioning system, in order to meet the heating requirements at low temperatures, a PTC heater is also installed on the air conditioning system. Arranging two PTC heaters on the vehicle causes a waste of resources and also increases the difficulty of maintenance.

In response to the above problems, no effective solution has yet been proposed.

Contents of the invention

Embodiments of the present application provide an air intake system, a thermal management method and a vehicle for a fuel cell engine to at least solve the problem of high equipment costs caused by arranging two PTC heaters to respectively heat the air intake of the air conditioning system and the fuel cell engine. and technical issues that are difficult to maintain.

According to one aspect of the embodiment of the present application, a fuel cell engine air intake system is provided, including: a first branch, the exhaust end of the first branch is connected to the air inlet end of the fuel cell stack, the first branch It includes a PTC heater, a supercharger and a supercharged intercooling heat exchanger that are connected in sequence; the second branch, between the exhaust end of the second branch and the outlet end of the PTC heater and the inlet end of the supercharger The pipeline is connected; the third branch, the air inlet end of the third branch is connected to the pipeline connecting the outlet end of the PTC heater and the inlet end of the supercharger, and the exhaust end of the third branch is used for Connected to the air-conditioning blower; the vehicle control unit obtains the actual inlet temperature of the supercharger, the actual inlet temperature of the air-conditioning blower, the required inlet temperature of the supercharger, the required inlet temperature of the air-conditioning blower, the required air flow of the fuel cell stack and the air conditioner The required air flow rate of the blower; the vehicle control unit determines the actual inlet temperature of the supercharger and the demand air flow of the fuel cell stack to determine the actual outlet temperature of the intensifier; the vehicle control unit is based on the actual outlet temperature of the intensifier, the actual inlet temperature of the air-conditioning blower, the demand inlet temperature of the supercharger, and the demand inlet of the air-conditioning blower. The temperature, the required air flow of the fuel cell stack and the required air flow of the air conditioning blower determine the heating power of the PTC heater and the outlet opening of the PTC heater.

Optionally, both the air inlet end of the first branch and the air inlet end of the second branch are connected to the air filter.

Optionally, the air inlet end of the first branch is connected to the outlet end of the air filter, and the air inlet end of the second branch is connected to the pipe connecting the air inlet end of the first branch and the outlet end of the air filter. The road is connected.

Optionally, a heat dissipation circuit is provided on the first branch, the heat dissipation circuit is connected with the supercharging and intercooling heat exchanger, and the heat dissipation circuit is connected with the supercharging and intercooling radiator.

Optionally, a regulating valve is provided at the inlet end of the supercharger, the first branch and the second branch are both connected to the regulating valve, and the regulating valve is used to adjust the openings of the first branch and the second branch.

Optionally, the air inlet end of the third branch is located between the regulating valve and the PTC heater.

According to another aspect of the embodiment of the present application, a thermal management method for a fuel cell engine is also provided, which is used to control the above-mentioned fuel cell engine air intake system. The method includes: obtaining the working parameters of the supercharger, where the working parameters Including at least one of the following: the actual inlet temperature of the supercharger, the required inlet temperature of the supercharger; when the outlet opening of the PTC heater is adjusted to the preset opening value, determine whether the actual inlet temperature of the supercharger is Greater than or equal to the required inlet temperature of the supercharger; if not, generate a control instruction set, which is used to control the fuel cell engine air intake system to execute a thermal management strategy, where the thermal management strategy includes at least one of the following: adjusting PTC heating The strategy of heating power of the air conditioner and the strategy of adjusting the speed of the air conditioner blower.

Optionally, determining the heating power of the PTC heater includes the following steps: obtaining a first temperature difference based on the actual outlet temperature of the intensifier and the lowest allowable inlet temperature of the fuel cell stack, and determining the first temperature difference based on the first temperature difference and the fuel The first heat value is obtained based on the required air flow of the battery stack; the second temperature difference is obtained based on the actual inlet temperature of the air-conditioning blower and the required inlet temperature of the air-conditioning blower; the second temperature difference is obtained based on the second temperature difference and the air demand of the air-conditioning blower. flow, the second calorific value is obtained; according to the demand air flow of the air conditioning blower and the demand air flow of the fuel cell stack, the total air flow value is obtained; based on the first caloric value, the second caloric value, the total air flow value and PTC The heat exchange area of the heater determines the heating power of the PTC heater.

Optionally, adjusting the outlet opening of the PTC heater includes the following steps: comparing the actual inlet temperature of the supercharger with the required inlet temperature of the supercharger to obtain a comparison result; based on the comparison result, adjusting the outlet opening of the PTC heater. degree to adjust.

According to another aspect of the embodiment of the present application, a vehicle is also provided, including a fuel cell engine air intake system, and the fuel cell engine air intake system is the above-mentioned fuel cell engine air intake system.

In the embodiment of this application, the first branch supplies air to the fuel cell stack. A PTC heater is provided on the first branch. The PTC heater heats the air entering the fuel cell stack. The third branch is The air-conditioning blower supplies air, and the third branch is connected downstream of the PTC heater. The air entering the air-conditioning blower is also heated through the PTC heater. By arranging a PTC heater, it can simultaneously meet the requirements of heating the fuel cell engine intake air and The heating requirements of the air conditioning system reduce equipment costs and equipment maintenance difficulty compared to a system with two PTC heaters. The vehicle control unit adjusts the heating power of the PTC heater and the outlet opening of the PTC heater according to the intake air temperature requirements of the fuel cell engine and the warm air demand of the air conditioning system, so as to meet the premise of meeting the intake air heating requirements of the fuel cell engine. , and can also meet the heating heat needs of the air conditioning system.

Description of drawings

The drawings described here are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the attached picture:

Figure 1 is a hardware structure block diagram of a computer terminal according to an optional thermal management method for a fuel cell engine according to an embodiment of the present application;

Figure 2 is a structural block diagram of an optional air intake system of a fuel cell engine according to an embodiment of the present application;

Figure 3 is a flow chart of an optional thermal management method for a fuel cell engine according to an embodiment of the present application.

Among them, the above-mentioned drawings include the following reference signs:
100. First branch; 101. Air filter; 102. PTC heater; 103. Supercharger; 104. Supercharging and intercooling heat exchanger; 105. Fuel cell stack; 106. First temperature sensor; 107. Heat dissipation circuit; 108. Expansion water tank; 109. Water pump; 110. Supercharged intercooling radiator; 111. Second temperature sensor;
200. Second branch;
300. Third branch; 301. Air conditioning blower; 302. Third temperature sensor;
400. Regulating valve.

Detailed ways

In order to enable those in the technical field to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only These are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts should belong to The scope of protection of this application.

It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus that encompasses a series of steps or units and need not be limited to those explicitly listed. Those steps or elements may instead include other steps or elements not expressly listed or inherent to the process, method, product or apparatus.

According to an embodiment of the present application, a method embodiment of a thermal management method for a fuel cell engine is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be implemented in a computer system such as a set of computer executable instructions. are performed, and, although a logical order is shown in the flowchart diagrams, in some cases the steps shown or described may be performed in a different order than herein.

This method embodiment may be executed in an electronic device including a memory and a processor or a similar computing device in the vehicle. Taking the electronic device running on the vehicle as an example, as shown in Figure 1, the electronic device of the vehicle may include one or more processors 502 (the processor may include but is not limited to a central processing unit (CPU), a graphics processing unit (GPU) ), digital signal processing (DSP) chips, microprocessors (MCU), programmable logic devices (FPGA), neural network processors (NPU), tensor processors (TPU), artificial intelligence (AI) type processors, etc. processing device) and a memory 504 for storing data. Optionally, the above-mentioned electronic device of the automobile may also include a transmission device 506 for communication functions, an input and output device 508, and a display 510. Persons of ordinary skill in the art can understand that the structure shown in FIG. 1 is only illustrative and does not limit the structure of the electronic device of the vehicle. For example, the electronic device of the vehicle may also include more or less components than the above structural description, or have a different configuration than the above structural description.

The memory 504 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the thermal management method of the fuel cell engine in the embodiment of the present application. The processor 502 runs the computer program stored in the memory 504 , thereby executing various functional applications and data processing, that is, realizing the above-mentioned thermal management method of the fuel cell engine. Memory 504 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 504 may further include memory located remotely relative to the processor 502, and these remote memories may be connected to the mobile terminal through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.

Transmission device 506 is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 506 includes a network adapter (Network Interface Controller, NIC for short), which can be connected to other network devices through a base station. This enables communication with the Internet. In one example, the transmission device may be a radio frequency (Radio Frequency, RF for short) module, which is used to communicate with the Internet wirelessly.

Display 510 may be, for example, a touch screen liquid crystal display (LCD). The liquid crystal display may enable a user to interact with the user interface of the mobile terminal. In some embodiments, the above-mentioned mobile terminal has a graphical user interface (GUI), and the user can perform human-computer interaction with the GUI through finger contact and/or gestures on the touch-sensitive surface. The human-computer interaction function here is optional. Including the following interactions: creating web pages, drawing, word processing, making electronic documents, games, video conferencing, instant messaging, sending and receiving emails, call interfaces, playing digital videos, playing digital music and/or web browsing, etc. for executing the above human-computer tasks Executable instructions for the interactive functions are configured/stored in one or more processor-executable computer program products or readable storage media.

This embodiment provides a fuel cell engine air intake system. Figure 2 is a structural block diagram of a fuel cell engine air intake system according to an optional embodiment of the present application. As shown in Figure 2, the fuel cell engine air intake system The system includes: the first branch 100, the second branch 200, the third branch 300 and the vehicle control unit.

Specifically, the exhaust end of the first branch 100 is connected to the inlet end of the fuel cell stack 105. The first branch 100 includes a PTC heater 102, a supercharger 103 and a supercharged and intermediate cooling heat exchanger that are connected in sequence. 104. The exhaust end of the second branch 200 is connected to a pipeline connecting the outlet end of the PTC heater 102 and the inlet end of the supercharger 103 . The air inlet end of the third branch 300 is connected to the pipeline connecting the outlet end of the PTC heater 102 and the inlet end of the supercharger 103 , and the exhaust end of the third branch 300 is used to communicate with the air conditioning blower 301 . The vehicle control unit obtains the actual inlet temperature of the supercharger 103, the actual inlet temperature of the air conditioning blower 301, the required inlet temperature of the supercharger 103, the required inlet temperature of the air conditioning blower 301, the required air flow of the fuel cell stack 105, and the air conditioner Based on the required air flow of the blower 301, the vehicle control unit determines the actual outlet temperature of the intensifier based on the actual inlet temperature of the supercharger 103 and the required air flow of the fuel cell stack 105. The vehicle control unit determines the actual outlet temperature of the intensifier based on the actual inlet temperature of the supercharger 103. , the actual inlet temperature of the air conditioning blower 301, the demand inlet temperature of the supercharger 103, the demand inlet temperature of the air conditioning blower 301, the demand air flow of the fuel cell stack 105 and the demand air flow of the air conditioning blower 301, determine the PTC heater 102 Heating power and outlet opening of the PTC heater 102.

In the embodiment of the present application, the first branch 100 supplies air to the fuel cell stack 105. A PTC heater 102 is provided on the first branch 100. The PTC heater 102 controls the air entering the fuel cell stack 105. For heating, the third branch 300 supplies air to the air conditioning blower 301. The third branch 300 is connected downstream of the PTC heater 102. The air entering the air conditioning blower 301 is also heated through the PTC heater 102. By arranging a The PTC heater 102 is used to simultaneously meet the heating needs of the fuel cell engine inlet air heating and air conditioning systems. Compared with a system in which two PTC heaters 102 are arranged, the equipment cost and equipment maintenance difficulty are reduced. The vehicle control unit adjusts the heating power of the PTC heater 102 and the outlet opening of the PTC heater 102 according to the intake air temperature demand of the fuel cell engine and the warm air demand of the air conditioning system to meet the requirements of the fuel cell engine. On the premise of air heating, it can also meet the heating heat demand of the air conditioning system.

Specifically, each branch of the fuel cell engine air intake system and the vehicle control unit are described in detail below.

In order to protect the fuel cell engine and the air conditioning system, the air entering the fuel cell stack 105 and the air conditioning blower 301 needs to be filtered. Specifically, the air inlet end of the first branch 100 and the air inlet end of the second branch 200 are both Communicated with air filter 101. In order to reduce equipment costs, the first branch 100 and the second branch 200 share an air filter 101. Specifically, the air inlet end of the first branch 100 is connected to the outlet end of the air filter 101, and the second branch The air inlet end of 200 is connected with the pipeline between the air inlet end of the first branch 100 and the outlet end of the air filter 101.

The temperature of the air increases after passing through the supercharger 103, and the high-temperature air is cooled to the required temperature through the supercharging and intercooling heat exchanger 104, and finally enters the fuel cell stack 105. The first branch 100 is provided with a heat dissipation circuit 107. The heat dissipation circuit 107 is connected to the supercharging and intercooling heat exchanger 104. The heat dissipation circuit 107 is connected to a supercharging and intercooling radiator 110. The supercharging and intercooling radiator 110 is used to The supercharging and intercooling heat exchanger 104 performs cooling. The heat dissipation circuit 107 is also provided with a water pump 109, an expansion tank 108 and a second temperature sensor 111. According to the temperature fed back by the second temperature sensor 111, the rotation speed of the water pump 109 is adjusted to cool down the supercharging and intercooling heat exchanger 104.

The first branch 100 is provided with a first temperature sensor 106, which is provided at the inlet end of the air conditioning blower 301. The third branch 300 is provided with a third temperature sensor 302, which is provided at at the inlet end of the supercharger 103. The vehicle control unit adjusts the heating power of the PTC heater 102 according to the temperatures fed back by the first temperature sensor 106 and the third temperature sensor 302 to meet the intake air temperature of the fuel cell engine and the warm air demand of the air conditioning system.

The inlet end of the supercharger 103 is provided with a regulating valve 400. The first branch 100 and the second branch 200 are both connected to the regulating valve 400. The regulating valve 400 is used to regulate the opening of the first branch 100 and the second branch 200. Specifically, the air inlet end of the third branch 300 is located between the regulating valve 400 and the PTC heater 102 . The setting of the regulating valve 400 adjusts the air intake ratio of the first branch 100 and the second branch 200, that is, adjusts the ratio of air heated by PTC and air not heated by PTC, under the premise that the PTC heater 102 is turned on. , ensuring that the temperature of the air flowing into the supercharger 103 is within the set range so that the fuel cell engine can operate efficiently.

Among them, the inlet temperature control priority of the fuel cell stack 105 is higher than the inlet temperature control priority of the air conditioning blower 301. That is, under the premise that the PTC heater 102 is turned on, the vehicle control unit adjusts the PTC heater according to the temperature parameters. The power and outlet opening of 102 give priority to meeting the inlet air temperature requirements of the fuel cell stack 105 and at the same time meet the inlet air temperature requirements of the air conditioning blower 301 as much as possible.

According to another aspect of the embodiment of the present application, a thermal management method for a fuel cell engine is also provided. Figure 3 is a flow chart of a thermal management method for a fuel cell engine according to one embodiment of the present application, as shown in Figure 3 , The process includes the following steps: Step S1: Obtain the working parameters of the supercharger, where the working parameters include at least one of the following: the actual inlet temperature of the supercharger and the required inlet temperature of the supercharger. Step S2: When the outlet opening of the PTC heater is adjusted to the preset opening value, determine whether the actual inlet temperature of the supercharger is greater than or equal to the required inlet temperature of the supercharger. Step S3: If not, generate a control instruction set. The control instruction set is used to control the fuel cell engine air intake system to execute a thermal management strategy, where the thermal management strategy includes at least one of the following: a strategy for adjusting the heating power of the PTC heater, adjustment Air conditioner blower speed strategy.

In the embodiment of the present application, one PTC heater is arranged to simultaneously meet the heating needs of the fuel cell engine inlet air heating and air conditioning system. Compared with a system in which two PTC heaters are arranged, equipment costs and equipment are saved. Maintenance difficulty. The vehicle control unit adjusts the heating power of the PTC heater and the outlet opening of the PTC heater according to the intake air temperature requirements of the fuel cell engine and the warm air demand of the air conditioning system, so as to meet the premise of meeting the intake air heating requirements of the fuel cell engine. , and can also meet the heating heat needs of the air conditioning system. When the outlet opening of the PTC heater is constant, priority can be given to meeting the inlet air temperature requirements of the fuel cell engine through a strategy of adjusting the heating power of the PTC heater and/or a strategy of adjusting the speed of the air conditioner blower, for example, when adjusting the valve After the opening reaches the maximum value, the actual inlet temperature of the supercharger is still less than the required inlet temperature of the supercharger. The speed of the air conditioning blower can be reduced so that the air heated by the PTC heater can more meet the requirements of the fuel cell engine. Air intake requirements.

In step S3, determining the heating power of the PTC heater includes the following steps:

Step S01: According to the actual outlet temperature of the intensifier and the minimum allowable inlet temperature of the fuel cell stack, the first temperature difference is obtained. According to the first temperature difference and the required air flow rate of the fuel cell stack, the first temperature difference is obtained. caloric value.

Step S02: Obtain a second temperature difference based on the actual inlet temperature of the air conditioning blower and the required inlet temperature of the air conditioning blower, and obtain a second heat value based on the second temperature difference and the required air flow of the air conditioning blower.

Step S03: According to the required air flow rate of the air conditioning blower and the required air flow rate of the fuel cell stack.

Step S04: Based on the first heat value, the second heat value, the total air flow value and the heat exchange area of the PTC heater, obtain the heating power of the PTC heater.

In step S3, adjusting the outlet opening of the PTC heater includes the following steps:

Step S001: Compare the actual inlet temperature of the supercharger with the required inlet temperature of the supercharger to obtain the comparison result.

Step S002: Based on the comparison result, adjust the outlet opening of the PTC heater.

Specifically, the opening of the regulating valve is adjusted through the PI closed-loop control method: if the actual inlet temperature of the supercharger is higher than the required inlet temperature of the electric supercharger, the opening of the regulating valve is reduced, and more air is supplied to the supercharger. from without PTC The heater heats the air. If the actual inlet temperature of the supercharger is lower than the required inlet temperature of the electric supercharger, the opening of the regulating valve is increased, and more of the air in the supercharger comes from the air heated by the PTC heater. When the opening of the regulating valve reaches the maximum value, the actual inlet temperature of the supercharger is still less than the required inlet temperature of the supercharger, which can reduce the speed of the air conditioning blower so that the air heated by the PTC heater can more satisfy the fuel cell engine. air intake requirements.

The above serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

In the above-mentioned embodiments of the present application, each embodiment is described with its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units may be a logical functional division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the units or modules may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program code. .

The above descriptions are only preferred embodiments of the present application. It should be pointed out that for those of ordinary skill in the art As a researcher, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be regarded as the protection scope of this application.

Claims

A fuel cell engine air intake system, characterized by including:

A first branch. The exhaust end of the first branch is connected to the air inlet end of the fuel cell stack. The first branch includes a PTC heater, a supercharger and a cooling and heat exchanger in the supercharging system that are connected in sequence. device;

A second branch, the exhaust end of the second branch is connected to a pipeline connecting the outlet end of the PTC heater and the inlet end of the supercharger;

The third branch, the air inlet end of the third branch is connected to the pipeline connecting the outlet end of the PTC heater and the inlet end of the supercharger, and the exhaust of the third branch The end is used to communicate with the air conditioner blower;

The vehicle control unit obtains the actual inlet temperature of the supercharger, the actual inlet temperature of the air-conditioning blower, the demand inlet temperature of the supercharger, the demand inlet temperature of the air-conditioning blower, the demand air flow of the fuel cell stack and the demand air flow of the air-conditioning blower. ; The vehicle control unit determines the actual outlet temperature of the intensifier based on the actual inlet temperature of the supercharger and the required air flow of the fuel cell stack; the vehicle control unit determines the actual outlet temperature of the intensifier based on The outlet temperature, the actual inlet temperature of the air conditioning blower, the demand inlet temperature of the supercharger, the demand inlet temperature of the air conditioning blower, the demand air flow of the fuel cell stack and the demand air flow of the air conditioning blower , determine the heating power of the PTC heater and the outlet opening of the PTC heater.
The fuel cell engine air intake system according to claim 1, wherein the air inlet end of the first branch and the air inlet end of the second branch are both connected to an air filter.
The fuel cell engine air intake system according to claim 2, characterized in that the air inlet end of the first branch is connected to the outlet end of the air filter, and the air inlet end of the second branch is connected to A pipeline communicates between the air inlet end of the first branch and the outlet end of the air filter.
The fuel cell engine air intake system according to claim 1, characterized in that a heat dissipation circuit is provided on the first branch, and the heat dissipation circuit is connected with the supercharging and intercooling heat exchanger. Connected to a supercharged intercooler radiator.
The fuel cell engine air intake system according to claim 1, characterized in that a regulating valve is provided at the inlet end of the supercharger, and the first branch and the second branch are connected to the regulating valve. Communicated, the regulating valve is used to adjust the opening of the first branch and the second branch.
The fuel cell engine air intake system according to claim 5, wherein the air inlet end of the third branch is located between the regulating valve and the PTC heater.
A thermal management method for a fuel cell engine, characterized in that it is used to control the fuel cell engine air intake system according to any one of claims 1 to 6, the method comprising:

Obtain the working parameters of the supercharger, wherein the working parameters include at least one of the following: the actual inlet temperature of the supercharger, the required inlet temperature of the supercharger;

When the outlet opening of the PTC heater is adjusted to the preset opening value, determine whether the actual inlet temperature of the supercharger is greater than or equal to the required inlet temperature of the supercharger;

If not, generate a control instruction set, which is used to control the fuel cell engine air intake system to execute a thermal management strategy, wherein the thermal management strategy includes at least one of the following: adjusting the heating power of the PTC heater Strategy, strategy for adjusting the speed of the air conditioner blower.
The method according to claim 7, wherein determining the heating power of the PTC heater includes the following steps:

According to the actual outlet temperature of the intensifier and the lowest allowable inlet temperature of the fuel cell stack, a first temperature difference is obtained. According to the first temperature difference and the required air flow of the fuel cell stack, Get the first caloric value;

According to the actual inlet temperature of the air-conditioning blower and the required inlet temperature of the air-conditioning blower, a second temperature difference is obtained. According to the second temperature difference and the required air flow rate of the air-conditioning blower, a second heat amount is obtained. value;

According to the demand air flow of the air conditioning blower and the demand air flow of the fuel cell stack, the total air flow value is obtained;

Based on the first heat value, the second heat value, the total air flow value and the heat exchange area of the PTC heater, the heating power of the PTC heater is obtained.
The method according to claim 7, wherein adjusting the outlet opening of the PTC heater includes the following steps:

Compare the actual inlet temperature of the supercharger with the required inlet temperature of the supercharger to obtain a comparison result;

Based on the comparison result, the outlet opening of the PTC heater is adjusted.
A vehicle includes a fuel cell engine air intake system, characterized in that the fuel cell engine air intake system is the fuel cell engine air intake system according to any one of claims 1-6.