Thermal management method, controller and system for fuel cell engineering vehicle

Abstract

The invention discloses a thermal management method for a fuel cell engineering vehicle, a controller, a system and a storage medium, and relates to the technical field of new energy vehicles. The thermal management system of the fuel cell engineering vehicle comprises a compressor air conditioner loop, a fuel cell loop, an electric drive system loop and a power cell loop, all the loops are connected through diverter valves, and all the loops comprise respective temperature sensors; the method comprises the steps that a flow guide valve connected with a compressor air conditioner loop and all loops needing to be heated is controlled so as to communicate the compressor air conditioner loop and all the loops needing to be heated; a flow guide valve connected with the compressor air conditioner loop and the loops needing heat dissipation is controlled so as to communicate the compressor air conditioner loop and the loops needing heat dissipation; and under the condition that the temperature of the backflow medium meets the heating required temperature of the loop needing to be heated, the flow guide valve is controlled to enable the backflow medium to flow into the corresponding loop needing to be heated. According to the method, the energy utilization rate of the fuel cell engineering vehicle is improved, and the cruising ability is improved to the maximum extent.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and in particular to a thermal management method, controller, system and storage medium for fuel cell engineering vehicles. Background Art

[0002] At present, all major automobile manufacturers are launching new energy products, whether they are pure electric, hybrid, or extended-range vehicles. Designing an excellent and reasonable thermal management system can keep the temperature of the entire vehicle in a suitable temperature range, and at the same time can efficiently distribute and utilize the energy of the entire vehicle to improve the vehicle's endurance. However, in the current automotive field, most manufacturers of hydrogen fuel cell vehicles have developed automotive thermal management systems that are basically independently distributed for their own heat dissipation, that is, using a distributed thermal management system for heat dissipation. The disadvantage of using a distributed thermal management system design is that there are many subsystem components, which increases costs, and it will take up a lot of space in the layout of the entire vehicle. The most important thing is that the use of distributed thermal management will make the energy of each subsystem unable to be fully utilized, that is, the waste heat generated by the system cannot be fully utilized, resulting in energy waste. The above-mentioned reasonably designed thermal management solution is particularly important for the rational use of energy in hydrogen energy vehicles. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a thermal management method for a fuel cell engineering vehicle, so as to solve the technical problem of how to reasonably distribute the thermal energy of the thermal management system in the prior art.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a thermal management method for a fuel cell engineering vehicle, wherein the thermal management system of the fuel cell engineering vehicle comprises: a compressor air conditioning circuit, a fuel cell circuit, an electric drive system circuit, and a power battery circuit, wherein each circuit is connected via a diversion valve, and each circuit comprises its own temperature sensor; the method comprises:

[0005] Determine the circuits that need to be heated and the circuits that need to be cooled in the thermal management system according to the temperature values ​​detected by the respective temperature sensors;

[0006] Control the guide valve connecting the compressor air conditioning circuit and each circuit that needs to be heated, so as to connect the compressor air conditioning circuit and each circuit that needs to be heated, and provide heating medium for the circuit that needs to be heated;

[0007] Control the guide valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, and control the thermal regulating valve in each circuit requiring heat dissipation to convert the heating medium into the heat dissipation medium of the circuit requiring heat dissipation;

[0008] Determine the temperature of the return medium of the circuit requiring heat dissipation according to the temperature value detected by the temperature sensor in the circuit requiring heat dissipation;

[0009] When the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, the corresponding diversion valve is controlled to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature.

[0010] In an embodiment of the present application, the circuits that need to be heated include: a fuel cell circuit and a power battery circuit, and the circuits that need to dissipate heat include an electric drive system circuit; the diverter valve connecting the compressor air-conditioning circuit and each circuit that needs to be heated is controlled to connect the compressor air-conditioning circuit and each circuit that needs to be heated, and a heating medium is provided for the circuit that needs to be heated, including: controlling the diverter valve connecting the compressor air-conditioning circuit and the fuel cell circuit to connect the fuel cell and the compressor air-conditioning circuit; the compressor air-conditioning circuit is self-heated by a heating medium, and a heating medium is provided to the fuel cell through the diverter valve connecting the fuel cell and the compressor air-conditioning circuit; when the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, the corresponding diverter valve is controlled to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature, including: when the temperature of the reflux medium of the electric drive system circuit or the power battery circuit meets the heating requirement temperature of the fuel cell circuit, the corresponding diverter valve is controlled to allow the reflux medium to flow into the fuel cell circuit.

[0011] In an embodiment of the present application, the thermal management method for a fuel cell engineering vehicle also includes: when the fuel cell circuit is a circuit that needs to be heated, the fuel cell starts self-heating until the temperature value detected by the temperature sensor of the fuel cell circuit reaches the lower limit of the fuel cell temperature; when the temperature value detected by the temperature sensor of the fuel cell circuit reaches the lower limit of the fuel cell temperature, the guide valve connected to the fuel cell circuit is adjusted to reduce the medium flow in the fuel cell circuit.

[0012] In an embodiment of the present application, the fuel cell circuit and the electric drive system circuit are circuits that require heat dissipation, and the power battery circuit is a circuit that requires heating; when the temperature of the reflux medium meets the heating requirement temperature of the circuit that requires heating, the corresponding diversion valve is controlled to allow the reflux medium to flow into the circuit that requires heating corresponding to the heating requirement temperature, including: when the temperature of the reflux medium of the fuel cell circuit or the electric drive system circuit meets the heating requirement temperature of the circuit that requires heating, the corresponding diversion valve is controlled to allow the reflux medium to flow into the compressor air-conditioning circuit and / or the power battery circuit.

[0013] In an embodiment of the present application, the thermal management method for a fuel cell engineering vehicle further includes: when the power battery circuit is a circuit that needs to be heated, the power battery circuit starts self-heating until the temperature value detected by the temperature sensor of the power battery circuit reaches the lower limit of the power battery temperature; when the temperature value detected by the temperature sensor of the power battery circuit reaches the lower limit of the power battery temperature, the diverter valve connected to the power battery circuit is adjusted to reduce the medium flow in the fuel cell circuit.

[0014] In an embodiment of the present application, the circuits that require heat dissipation include: a compressor air-conditioning circuit, a fuel cell circuit, an electric drive system circuit, and a power battery circuit; the thermal regulating valves in each circuit that requires heat dissipation are controlled to convert the heating medium into the heat dissipation medium of the circuit that requires heat dissipation, including: controlling the thermal valve of the compressor air-conditioning circuit to convert the heating medium into a heat dissipation medium provided to the evaporator in the compressor air-conditioning circuit; controlling the electromagnetic expansion valve in the fuel cell circuit to convert the heating medium into a heat dissipation medium provided to the fuel cell circuit; controlling the thermal valve of the electric drive system circuit to convert the heating medium into a heat dissipation medium provided to the electric drive system circuit; and controlling the thermal valve of the power battery circuit to convert the heating medium into a heat dissipation medium provided to the power battery circuit.

[0015] In an embodiment of the present application, the guide valve connecting the compressor air-conditioning circuit and each circuit requiring heat dissipation is controlled to connect the compressor air-conditioning circuit and each circuit requiring heat dissipation, and the thermal regulating valve in each circuit requiring heat dissipation is controlled to convert the heating medium into the heat dissipation medium of the circuit requiring heat dissipation, and also includes: when the temperature value detected by the temperature sensor of the fuel cell circuit, the electric drive system circuit and the power battery circuit is greater than the upper limit of the temperature value of each circuit, the opening of the guide valve of the compressor air-conditioning circuit and each circuit requiring heat dissipation is controlled to be maximum; the thermal management method for fuel cell engineering vehicles also includes: when the fuel cell circuit is a circuit requiring heat dissipation and the temperature value detected by the temperature sensor of the fuel cell circuit reaches the lower limit of the temperature of the fuel cell, the guide valve connected to the fuel cell circuit is adjusted to reduce the medium flow in the fuel cell circuit; when the electric drive system circuit is a circuit requiring heat dissipation and the temperature value detected by the temperature sensor of the electric drive system circuit reaches the lower limit of the temperature of the fuel cell, the water pump speed of the fuel cell circuit is lowered to reduce the medium flow in the electric drive system circuit.

[0016] In an embodiment of the present application, the thermal management method for a fuel cell engineering vehicle further includes: after reducing the medium flow in the fuel cell circuit and the power battery, lowering the fan speed corresponding to the evaporator in the compressor air-conditioning circuit, and reducing the opening of the guide valve of each circuit that requires heat dissipation.

[0017] The second aspect of the present application provides a controller for a fuel cell engineering vehicle, which is configured to call instructions from a memory and implement the thermal management method for a fuel cell engineering vehicle provided in accordance with any one of the embodiments of the first aspect of the present application when executing the instructions.

[0018] The third aspect of the present application provides a thermal management system for a fuel cell engineering vehicle, comprising:

[0019] A compressor air conditioning circuit, comprising: a compressor; a condenser, connected to the compressor; a second four-way valve, wherein the second connection port of the second four-way valve is connected to the condenser; a first four-way valve, wherein the first connection port of the first four-way valve is connected to the fourth connection port of the second four-way valve; a second temperature sensor, connected to the third connection port of the first four-way valve; a first thermal valve, connected to the second temperature sensor; an evaporator, connected to the first thermal valve; a first temperature sensor, connected to the evaporator and connected to the compressor; a fuel cell circuit, comprising: an electromagnetic expansion valve, connected to the second connection port of the first four-way valve; a third four-way valve, wherein the first connection port of the third four-way valve is connected to the electromagnetic expansion valve; a fuel cell, connected to the third connection port of the third four-way valve; a fourth temperature sensor, connected to the fuel cell; a fifth four-way valve, wherein the fifth The fourth connection port of the four-way valve is connected to the fourth temperature sensor; the fourth four-way valve, the second connection port of the fourth four-way valve is connected to the third connection port of the fifth four-way valve, and the fourth connection port of the fourth four-way valve is connected to the fourth connection port of the first four-way valve; the electric drive system circuit includes: a third thermal valve, connected to the second connection port of the third four-way valve; the electric drive system, connected to the third thermal valve; a fifth temperature sensor, connected to the electric drive system, and the second connection port of the fifth four-way valve is connected to the fifth temperature sensor; the fifth four-way valve, the second connection port of the fifth four-way valve is connected to the fifth temperature sensor, and the fourth connection port of the fifth four-way valve is connected to the fuel cell; the power battery circuit includes: a second thermal valve, connected to the second connection port of the first four-way valve; a plate heat exchanger, connected to the second thermal valve Valve; a sixth four-way valve, the third connection port of the sixth four-way valve is connected to the plate heat exchanger, the first connection port of the sixth four-way valve is connected to the fourth connection port of the third four-way valve, and the second connection port of the sixth four-way valve is connected to the first connection port of the fifth four-way valve; a second three-way valve, the second connection port of the second three-way valve is connected to the plate heat exchanger; a battery pack, connected to the third connection port of the second three-way valve; a sixth temperature sensor, connected to the battery pack; a third three-way valve, the second connection port of the third three-way valve is connected to the sixth temperature sensor, the first connection port of the third three-way valve is connected to the fourth connection port of the third four-way valve, and the first connection port of the third three-way valve is connected to the fourth connection port of the fourth four-way valve; a fourth four-way valve, the second connection port of the fourth four-way valve is connected to the third connection port of the fifth four-way valve, and the fourth four-way valve The third connection port of the second three-way valve is connected to the first connection port of the second three-way valve, the first connection port of the fourth four-way valve is connected to the fourth connection port of the third four-way valve, and the fourth connection port of the fourth four-way valve is connected to the fourth connection port of the first four-way valve; the controller is configured to obtain the second temperature value of the second temperature sensor, the fourth temperature value of the fourth temperature sensor, the fifth temperature value of the fifth temperature sensor, and the sixth temperature value of the sixth temperature sensor; the controller determines the circuit that needs to be heated and the circuit that needs to be dissipated in the thermal management system according to the fourth temperature value, the fifth temperature value, and the sixth temperature value; the controller controls the multi-way valve connecting the compressor air-conditioning circuit and each circuit that needs to be heated to connect the compressor air-conditioning circuit and each circuit that needs to be heated, and provides a heating medium for the circuit that needs to be heated;The controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, and controls the thermal regulating valve in each circuit requiring heat dissipation to convert the heating medium into the heat dissipation medium of the circuit requiring heat dissipation; the controller determines the return medium temperature of the circuit requiring heat dissipation according to the temperature value detected by the temperature sensor in the circuit requiring heat dissipation; the controller controls the corresponding multi-way valve to make the return medium flow into the circuit requiring heat corresponding to the heating demand temperature when the return medium temperature meets the heating demand temperature of the circuit requiring heat.;

[0020] In an embodiment of the present application, the circuits that require heat dissipation include: a fuel cell circuit, an electric drive system circuit, and a power battery circuit; controlling the multi-way valve connecting the compressor air-conditioning circuit and each circuit that requires heat dissipation to connect the compressor air-conditioning circuit and each circuit that requires heat dissipation, including: controlling the second four-way valve to operate so that the second connection port and the fourth connection port of the second four-way valve are connected; controlling the first four-way valve to operate so that the first connection port and the third connection port of the first four-way valve are connected, and controlling the first four-way valve to operate so that the first connection port and the second connection port of the first four-way valve are connected; controlling the third four-way valve to operate so that the first connection port and the third connection port of the third four-way valve are connected, and controlling the third four-way valve to operate so that the first connection port and the second connection port of the third four-way valve are connected; controlling the fifth four-way valve to operate so that the second connection port and the third connection port of the fifth four-way valve are connected, and controlling the fifth four-way valve to operate so that the fourth connection port and the third connection port of the fifth four-way valve are connected; controlling the fourth four-way valve to operate so that the second connection port of the fourth four-way valve is connected to the first connection port, the third connection port of the fourth four-way valve, respectively. The third connection port is connected to the fourth connection port; the first four-way valve is controlled to operate so that the fourth connection port of the first four-way valve is connected to the second connection port, and the first four-way valve is controlled to operate so that the fourth connection port of the first four-way valve is connected to the third connection port; the third four-way valve is controlled to operate so that the fourth connection port of the third four-way valve is connected to the second connection port, and the third four-way valve is controlled to operate so that the fourth connection port of the third four-way valve is connected to the third connection port; the second three-way valve is controlled to operate so that the first connection port of the second three-way valve is connected to the third connection port, and the second three-way valve is controlled to operate so that the second connection port of the second three-way valve is connected to the third connection port; the third three-way valve is controlled to operate so that the second connection port of the third three-way valve is connected to the first connection port, and the third three-way valve is controlled to operate so that the second connection port of the third three-way valve is connected to the third connection port; the sixth four-way valve is controlled to operate so that the third connection port of the sixth four-way valve is connected to the first connection port; the thermal regulating valves in each circuit that needs heat dissipation are controlled, including: controlling the electromagnetic expansion valve, the first thermal valve, the second thermal valve and the third thermal valve for refrigeration.

[0021] In an embodiment of the present application, the circuits that need to be heated include: a fuel cell circuit and a power battery circuit; the circuits that need to dissipate heat include an electric drive system circuit; the compressor air-conditioning circuit is self-heated; the multi-way valve connecting the compressor air-conditioning circuit and each circuit that needs to be heated is controlled to connect the compressor air-conditioning circuit and each circuit that needs to be heated, including: controlling the second four-way valve to act so that the fourth connection port of the second four-way valve is connected to the plate heat exchanger; controlling the second four-way valve to act so that the second connection port and the fourth connection port of the second four-way valve are connected; controlling the first four-way valve to act so that the first connection port and the third connection port of the first four-way valve are connected, controlling the first four-way valve to act so that the first connection port and the second connection port of the first four-way valve are connected; controlling the third four-way valve to act so that the first connection port and the third connection port of the third four-way valve are connected, controlling the third four-way valve to act so that the first connection port and the second connection port of the third four-way valve are connected; controlling the fifth four-way valve to act so that the second connection port and the third connection port of the fifth four-way valve are connected, and controlling the fifth four-way valve to act so that the fourth connection port of the fifth four-way valve The interface is connected with the third connection port; the fourth four-way valve is controlled to operate so that the second connection port of the fourth four-way valve is connected with the first connection port, the third connection port and the fourth connection port of the fourth four-way valve respectively; the first four-way valve is controlled to operate so that the fourth connection port and the second connection port of the first four-way valve are connected, and the first four-way valve is controlled to operate so that the fourth connection port and the third connection port of the first four-way valve are connected; the third four-way valve is controlled to operate so that the fourth connection port and the second connection port of the third four-way valve are connected, and the third four-way valve is controlled to operate so that the fourth connection port and the third connection port of the third four-way valve are connected; the second three-way valve is controlled to operate so that the first connection port and the third connection port of the second three-way valve are connected, and the second three-way valve is controlled to operate so that the second connection port and the third connection port of the second three-way valve are connected; the third three-way valve is controlled to operate so that the second connection port and the first connection port of the third three-way valve are connected, and the third three-way valve is controlled to operate so that the second connection port and the third connection port of the third three-way valve are connected; the sixth four-way valve is controlled to operate so that the third connection port and the first connection port of the sixth four-way valve are connected.

[0022] Controlling the thermal regulating valves in each circuit that needs heat dissipation includes: controlling the third thermal valve to cool.

[0023] In an embodiment of the present application, when the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, the corresponding guide valve is controlled to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature, including: when the temperature value detected by the fifth temperature sensor meets the heating requirement temperature of the power battery circuit, the fifth four-way valve is controlled to operate so that the second connection port and the third connection port of the fifth four-way valve are connected, and the second three-way valve is controlled so that the first connection port and the third connection port of the second three-way valve are connected, so that the reflux medium flows into the battery pack; when the temperature value detected by the fifth sensor meets the heating requirement temperature of the fuel cell circuit, the fifth four-way valve is controlled to operate so that the first connection port and the second connection port of the fifth four-way valve are connected, and the sixth four-way valve is controlled to operate so that the second connection port and the first connection port of the sixth four-way valve are connected.

[0024] In an embodiment of the present application, the system also includes: a PTC heater, connected between the plate heat exchanger and the first connection port of the fifth four-way valve; the controller is configured to control the connection between the plate heat exchanger and the PTC heater, and control the PTC heater to connect to the first connection port of the fifth four-way valve and the third connection port of the second four-way valve; the controller is configured to control the PTC heater to generate heat.

[0025] In an embodiment of the present application, a multi-way valve connecting a compressor air-conditioning circuit and each circuit that needs to be heated is controlled to connect the compressor air-conditioning circuit and each circuit that needs to be heated, and a heating medium is provided for the circuit that needs to be heated, and also includes: a controller controls the channel valve openings of the first connection port and the third connection port of the third four-way valve to be maximum, and the channel valve openings of the third connection port and the fourth connection port of the third four-way valve to be maximum; the controller controls the openings of each channel of the second three-way valve to be maximum, and the openings of each channel of the third three-way valve to be maximum; the controller controls the electromagnetic expansion valve to perform flow control at the maximum opening; the controller controls the thermal regulating valve in each circuit that needs heat dissipation to convert the heating medium into the heat dissipation medium of the circuit that needs heat dissipation, including: the controller controls the third thermal valve to open to convert the heating medium into the heat dissipation medium; the controller also controls the compressor speed to be set to the maximum, the fan speed corresponding to the evaporator to be the maximum, and the fan duty cycle of the fan corresponding to the electromagnetic expansion valve to be set to the maximum; the controller also controls the fuel cell to self-heat, and controls the power battery to self-heat.

[0026] In an embodiment of the present application, the thermal management method for a fuel cell engineering vehicle also includes: when the temperature value detected by the fourth temperature sensor rises to the lower temperature limit of the fuel cell circuit, shutting down the self-heating of the fuel cell, adjusting the channels of the first connection port and the third connection port of the third four-way valve, and the third connection port of the fifth four-way valve to reduce the medium flow in the fuel cell circuit.

[0027] In the embodiment of the present application, the fuel cell circuit and the electric drive system circuit are circuits that require heat dissipation, and the power battery circuit is a circuit that requires heating; the controller controls the multi-way valve connecting the compressor air-conditioning circuit and each circuit that requires heating to connect the compressor air-conditioning circuit and each circuit that requires heating, including: controlling the second four-way valve to operate so that the second connection port and the fourth connection port of the second four-way valve are connected; controlling the first four-way valve to operate so that the first connection port and the third connection port of the first four-way valve are connected; controlling the second three-way valve to operate so that the second connection port and the third connection port of the second three-way valve are connected; controlling the third three-way valve to operate so that the second connection port and the third connection port of the third three-way valve are connected; controlling the second four-way valve to operate so that the first connection port of the second four-way valve is connected to the plate heat exchanger, and controlling the second four-way valve to operate, So that the first connection port and the fourth connection port of the second four-way valve are connected; the controller controls the multi-way valve connecting the compressor air-conditioning circuit and each circuit that needs heat dissipation to connect the compressor air-conditioning circuit and each circuit that needs heat dissipation, including: controlling the first four-way valve to operate so that the first connection port and the second connection port of the first four-way valve are connected; controlling the third four-way valve to operate so that the first connection port and the second connection port of the third four-way valve are connected; controlling the third four-way valve to operate so that the first connection port and the third connection port of the third four-way valve are connected; controlling the fifth four-way valve to operate so that the second connection port and the third connection port of the fifth four-way valve are connected, and controlling the fifth four-way valve to operate so that the fourth connection port and the third connection port of the fifth four-way valve are connected; controlling the fourth four-way valve to operate so that the second connection port and the fourth connection port of the fourth four-way valve are connected.

[0028] In an embodiment of the present application, when the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, the corresponding diversion valve is controlled to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature, including: when the temperature value detected by the fourth temperature sensor meets the heating requirement temperature of the power battery circuit, the controller controls the fifth four-way valve to operate so that the third connection port and the fourth connection port of the fifth four-way valve are connected, and controls the fourth four-way valve to operate so that the second connection port and the third connection port of the fourth four-way valve are connected, and controls the second three-way valve to operate so that the first connection port and the third connection port of the second three-way valve are connected; when the temperature value detected by the fifth temperature sensor meets the heating requirement temperature of the power battery circuit, the controller controls the fifth four-way valve to operate so that the second connection port and the third connection port of the fifth four-way valve are connected, and controls the fourth four-way valve to operate so that the second connection port and the third connection port of the fourth four-way valve are connected, and controls the second three-way valve to operate so that the first connection port and the third connection port of the second three-way valve are connected.

[0029] In an embodiment of the present application, the controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, and further includes:

[0030] When the temperature value detected by the fourth temperature sensor rises to the upper temperature limit of the fuel cell circuit, the controller controls the channel valve openings of the first connection port and the third connection port of the third four-way valve to be maximum, and controls the channel valve openings of the fourth connection port and the third connection port of the fifth four-way valve to be maximum; when the temperature value detected by the fifth temperature sensor rises to the upper temperature limit of the electric drive system, the controller controls the channel valve openings of the first connection port and the second connection port of the third four-way valve to be maximum, and controls the channel valve openings of the second connection port and the third connection port of the fifth four-way valve to be maximum; when the temperature value detected by the fourth temperature sensor rises to the upper temperature limit of the fuel cell circuit, and when the temperature value detected by the fifth temperature sensor rises to the upper temperature limit of the electric drive system, the controller controls the opening of the electromagnetic expansion valve to be set to the maximum, and converts the heating medium into the heat dissipation medium.

[0031] In an embodiment of the present application, the thermal management method for a fuel cell engineering vehicle further includes: when the temperature value detected by the fourth temperature sensor drops to the lower temperature limit of the fuel cell circuit, the controller controls the channel valve openings of the first connection port and the third connection port of the third four-way valve to decrease, and controls the channel valve openings of the fourth connection port and the third connection port of the fifth four-way valve to decrease; when the temperature value detected by the fifth temperature sensor drops to the lower temperature limit of the electric drive system, the controller controls the channel valve openings of the first connection port and the second connection port of the third four-way valve to decrease, and controls the channel valve openings of the second connection port and the third connection port of the fifth four-way valve to decrease.

[0032] A fourth aspect of the present application provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute a thermal management method for a fuel cell engineering vehicle provided according to any one of the embodiments of the first aspect of the present application.

[0033] Through the above-mentioned technical scheme, it is possible to cool and heat fuel cell engineering vehicles, and multiple circuits are connected through a diversion valve to realize thermal management coupling, so that the return medium of the circuit that needs to dissipate heat can flow to the corresponding circuit that needs to be heated through the diversion valve for heating when the heating requirement temperature of the circuit that needs to be heated is met. Therefore, the thermal management method for fuel cell engineering vehicles provided in the embodiment of the present application breaks through the conventional vehicle thermal management system that uses multiple sub-thermal management systems to achieve cooling and heating, which is beneficial to improving the energy utilization rate of fuel cell engineering vehicles and maximizing the endurance.

[0034] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0036] Figure 1 A schematic diagram of a process flow of a thermal management method for a fuel cell engineering vehicle according to an embodiment of the present application is schematically shown;

[0037] Figure 2 The structure block diagram of a thermal management system for a fuel cell engineering vehicle according to an embodiment of the present application is schematically shown;

[0038] Figure 3 Schematically shows Figure 2 A partial structural block diagram of a thermal management system for a fuel cell engineering vehicle is shown;

[0039] Figure 4 Schematically shows Figure 2 A block diagram of another part of the thermal management system for a fuel cell engineering vehicle shown;

[0040] Figure 5 Schematically shows Figure 2 A block diagram of another portion of a thermal management system for a fuel cell engineering vehicle is shown. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0042] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations. In the embodiments of this application, some existing solutions in the industry such as certain software, components, and models may be mentioned, which should be considered as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of this application, but it does not mean that the applicant has or will necessarily use the solution.

[0043] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0045] In order to achieve mutual coupling between system cooling and system heating and realize the technical effect of improving energy utilization, an embodiment of the present application provides a thermal management method for a fuel cell engineering vehicle, which realizes thermal energy sharing of multiple systems by coupling the compressor air-conditioning circuit, the fuel cell circuit, the electric drive system circuit, and the power battery circuit to improve energy utilization.

[0046] Figure 1 The schematic diagram of a thermal management method for a fuel cell engineering vehicle according to an embodiment of the present application is shown schematically. The thermal management system of the fuel cell engineering vehicle includes: a compressor air conditioning circuit, a fuel cell circuit, an electric drive system circuit, and a power battery circuit, each circuit is connected through a diversion valve, and each circuit includes its own temperature sensor.

[0047] like Figure 1 As shown, the embodiment of the present application provides a thermal management method for a fuel cell engineering vehicle, comprising:

[0048] S102, determining a circuit that needs to be heated and a circuit that needs to be cooled in the thermal management system according to the temperature values ​​detected by the respective temperature sensors;

[0049] S104, controlling the guide valve connecting the compressor air conditioning circuit and each circuit that needs to be heated, so as to connect the compressor air conditioning circuit and each circuit that needs to be heated, and provide heating medium for the circuit that needs to be heated;

[0050] S106, controlling the guide valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, and controlling the thermal regulating valve in each circuit requiring heat dissipation to convert the heating medium into the heat dissipation medium of the circuit requiring heat dissipation;

[0051] S108, determining the temperature of the reflux medium in the circuit requiring heat dissipation according to the temperature value detected by the temperature sensor in the circuit requiring heat dissipation;

[0052] S110 . When the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, control the corresponding diversion valve to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature.

[0053] The thermal management method for fuel cell engineering vehicles provided in the embodiment of the present application monitors the medium temperature in each circuit through a temperature sensor to determine the circuit that needs to be heated and the circuit that needs to be cooled. The compressor air conditioning circuit and each circuit that needs to be heated are connected by controlling the diversion valve, so that the heating medium generated in the compressor air conditioning circuit is provided to each circuit that needs to be heated. Moreover, each circuit includes a thermal regulating valve. Therefore, for the circuit that needs to cool, the heating medium from the compressor air conditioning circuit can be converted into a cooling medium through the thermal regulating valve and supplied to the corresponding circuit that needs to cool. Thus, the thermal management coupling of multiple circuits is realized. In the case where there are circuits that need to cool and circuits that need to be heated at the same time, the method can monitor the temperature of the reflux medium of the circuit that needs to cool through a temperature sensor, and when the temperature of the reflux medium meets the heating requirement temperature of the corresponding circuit that needs to be heated, the corresponding diversion valve is controlled to make the reflux medium flow into the circuit that needs to be heated corresponding to the heating requirement temperature, thereby achieving full utilization of heat. Therefore, the thermal management method for fuel cell engineering vehicles provided in the embodiment of the present application can realize cooling and heating of fuel cell engineering vehicles, and multiple circuits are connected through a diversion valve to realize thermal management coupling, so that the reflux medium of the circuit that needs to dissipate heat can flow to the corresponding circuit that needs to be heated through the diversion valve for heating when the heating requirement temperature of the circuit that needs to be heated is met. Therefore, the thermal management method for fuel cell engineering vehicles provided in the embodiment of the present application breaks through the conventional vehicle thermal management system that uses multiple sub-thermal management systems to achieve cooling and heating, which is beneficial to improving the energy utilization rate of fuel cell engineering vehicles and maximizing the endurance.

[0054] It is understandable that the compressor air conditioning loop may include a compressor and may include a condenser for converting the high temperature and high pressure gas generated by the compressor into a high temperature and high pressure liquid. The high temperature and high pressure liquid generated by the condenser can be used as a heating medium for each loop. The compressor air conditioning loop may also include a first thermal valve for converting the heating medium into a heat dissipation medium. And an evaporator and a fan for conducting heat outward from the medium in the processing loop. Liquid pumps for regulating flow may be provided in the fuel cell loop, the electric drive system loop and the power battery loop, respectively. The liquid pump may be, for example, a water pump or a coolant pump. The fuel cell may include a hydrogen fuel cell, a biofuel cell, a methanol fuel cell, and the like.

[0055] The flow guide valves connecting each circuit may include a one-way valve and a multi-way valve and a combination thereof, and the number of the flow guide valves may be multiple. The heating requirement temperature may be set according to the reasonable operating temperature range of the main components in each circuit. For example, the fuel cell, the electric drive system and the power battery each have their corresponding reasonable operating temperature ranges, which can be used to set the heating requirement temperature of their corresponding circuits.

[0056] As an example, the heating requirement temperature of the fuel cell circuit can be set to the lower limit of the fuel cell's and reasonable operating temperature range. Therefore, the temperature of the return medium needs to be higher than or equal to the lower limit of the fuel cell's and reasonable operating temperature range before it can flow into the fuel cell circuit.

[0057] In some embodiments of the present application, the circuits that need to be heated include: a fuel cell circuit and a power battery circuit, and the circuits that need to dissipate heat include an electric drive system circuit;

[0058] Control the guide valve connecting the compressor air conditioning circuit and each circuit that needs to be heated to connect the compressor air conditioning circuit and each circuit that needs to be heated, and provide heating medium for the circuit that needs to be heated, including:

[0059] Controlling a guide valve connecting the compressor air conditioning circuit and the fuel cell circuit to connect the fuel cell and the compressor air conditioning circuit;

[0060] The compressor air conditioning circuit is self-heated by a heating medium, and the heating medium is provided to the fuel cell through a guide valve connecting the fuel cell and the compressor air conditioning circuit;

[0061] When the temperature of the reflux medium meets the heating requirement temperature of the circuit to be heated, the corresponding diversion valve is controlled to make the reflux medium flow into the circuit to be heated corresponding to the heating requirement temperature, including:

[0062] When the temperature of the reflux medium of the electric drive system circuit or the power battery circuit meets the heating requirement temperature of the fuel cell circuit, the corresponding guide valve is controlled to allow the reflux medium to flow into the fuel cell circuit.

[0063] The sub-zero temperature in winter is not the best operating temperature for fuel cells and power batteries, which will affect their performance. The most suitable temperature for air conditioning in winter is usually 20 to 22 degrees. If the fuel cell and power battery need to be heated at this time, the cab air conditioning system needs to be heated, and the electric drive system needs to dissipate heat. At the same time, when the ambient temperature is below zero, the fuel cell is prone to ice formation inside. The start-up of the fuel cell usually requires auxiliary heating through an electric heating wire. After the hot fuel cell with electric heating is successfully started, its temperature usually does not reach the lower limit of the best operating temperature. Therefore, the reflux medium of the electric drive system circuit or the power battery circuit can be supplied to the fuel cell circuit to heat the fuel cell.

[0064] In some embodiments of the present application, when the fuel cell circuit is a circuit that needs to be heated, the fuel cell starts self-heating until the temperature value detected by the temperature sensor of the fuel cell circuit reaches the lower limit of the fuel cell temperature. When the temperature value detected by the temperature sensor of the fuel cell circuit reaches the lower limit of the fuel cell temperature, the diversion valve connected to the fuel cell circuit is adjusted to reduce the medium flow in the fuel cell circuit.

[0065] Therefore, on the one hand, the fuel cell can be quickly heated up through self-heating, and on the other hand, when the fuel cell reaches the lower limit of the fuel cell temperature, the self-heating of the fuel cell can be turned off and the medium flow in the fuel cell circuit can be reduced to achieve the technical effect of energy saving.

[0066] In some embodiments of the present application, the thermal regulating valve in the fuel cell circuit may be, for example, an electromagnetic expansion valve, and the thermal regulating valve in the electric drive system is a thermal valve. A water pump may also be provided in the fuel cell circuit. When the fuel cell circuit is a circuit that needs to be heated and the fuel cell is turned on for self-heating, the diversion valve for connecting the compressor air conditioning circuit and the fuel cell circuit may be opened to the maximum, and the electromagnetic expansion valve in the fuel cell circuit may be opened to the maximum and only flow regulation is performed. The electric drive system circuit is a circuit that needs heat dissipation. The thermal valve in the electric drive system circuit is opened to convert the heating medium into a heat dissipation medium for heat dissipation. In addition, the compressor speed in the compressor air conditioning circuit may be set to the maximum, and the speed of the fan corresponding to the evaporator in the compressor air conditioning circuit may be set to the maximum. The water pump speed in the fuel cell circuit is set to the maximum, and the fan speed of the fan next to the electromagnetic expansion valve is set to the maximum. When the heating medium of the compressor air conditioning circuit and the power battery circuit meets the heating requirement temperature of the fuel cell circuit, the opening of the diversion valve of the compressor air conditioning circuit and the power battery circuit is set to the maximum, and the reflux medium of the compressor air conditioning circuit and the power battery circuit is used to heat the fuel cell circuit.

[0067] In some embodiments of the present application, the fuel cell circuit and the electric drive system circuit are circuits that require heat dissipation, and the power battery circuit is a circuit that requires heating. When the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, the corresponding diversion valve is controlled to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature, including: when the temperature of the reflux medium of the fuel cell circuit or the electric drive system circuit meets the heating requirement temperature of the circuit that needs to be heated, the corresponding diversion valve is controlled to allow the reflux medium to flow into the compressor air conditioning circuit and / or the power battery circuit.

[0068] Specifically, when the fuel cell circuit and the electric drive system circuit are circuits that require heat dissipation, the diversion valve connecting the compressor air-conditioning circuit with the fuel cell circuit and the electric drive system circuit is opened to the maximum, and the electromagnetic expansion valve in the fuel circuit is set to the maximum opening to control the flow of the heating medium and to release heat and cool down, and the compressor speed in the compressor air-conditioning circuit is set to the maximum. And in the case of the compressor air-conditioning circuit heating itself, the compressor speed in the compressor air-conditioning circuit can be set to the maximum, and the speed of the fan corresponding to the evaporator in the compressor air-conditioning circuit can be set to the maximum. The water pump speed in the fuel cell circuit is set to the maximum, and the fan speed of the fan next to the electromagnetic expansion valve is set to the maximum. The corresponding diversion valve openings of the compressor air-conditioning circuit and the power battery circuit are adjusted to the maximum.

[0069] In some embodiments of the present application, the thermal management system may further include a PTC (Positive Temperature Coefficient) heater, which is connected to each circuit through a diversion valve. In the case of self-heating of the compressor air-conditioning circuit, the PTC heater can be connected to the compressor air-conditioning circuit through the diversion valve and perform water heating, thereby achieving heating of the cab.

[0070] In some embodiments of the present application, when the fuel cell circuit is a circuit that requires heat dissipation, when the temperature value detected by the temperature sensor of the fuel cell circuit reaches the preset lower temperature limit of the fuel cell, the diverter valve connected to the fuel cell circuit is adjusted to reduce the medium flow in the fuel cell circuit. When the electric drive system circuit is a circuit that requires heat dissipation, when the temperature value detected by the temperature sensor of the electric drive system circuit reaches the preset lower temperature limit of the electric drive system, the diverter valve connected to the electric drive system circuit is adjusted to reduce the medium flow in the electric drive system circuit. This prevents the temperature of the fuel cell circuit from being too low.

[0071] In some embodiments of the present application, when the power battery circuit is a circuit that needs to be heated, the power battery circuit starts self-heating until the temperature value detected by the temperature sensor of the power battery circuit reaches the lower limit of the power battery temperature. When the temperature value detected by the temperature sensor of the power battery circuit reaches the lower limit of the power battery temperature, the diversion valve connected to the power battery circuit is adjusted to reduce the medium flow in the fuel cell circuit.

[0072] In some embodiments of the present application, the preset lower temperature limit in each circuit is, for example, higher than the lower temperature limit of the reasonable operating temperature range of each circuit during the main period, thereby preventing the temperature of each circuit from being too low during the heat dissipation period.

[0073] In some embodiments of the present application, the compressor air conditioning circuit may further include a pressure sensor.

[0074] In some embodiments of the present application, the compressor air-conditioning circuit may include a PT (Pressure-temperature) sensor. The power battery circuit is a circuit that needs to be heated. When the temperature value detected by the temperature sensor of the compressor air-conditioning circuit reaches the lower limit of the temperature, the relationship between the supercooling degree and the system heating capacity is obtained according to the temperature and pressure data of the PT sensor to ensure that the heating capacity of the power battery circuit is met while the energy efficiency ratio is maximized. If the heating capacity meets the demand, the self-heating of the PTC heater is turned off, the throttle valve opening used to turn on the PTC heater is lowered, and the speed of the water pump corresponding to the PTC heater is reduced. When all systems meet the heating or heat dissipation requirements, the speed of the compressor is lowered, and the speed of the electronic fan corresponding to the electromagnetic expansion valve is reduced.

[0075] In some embodiments of the present application, the circuits requiring heat dissipation include: a compressor air-conditioning circuit, a fuel cell circuit, an electric drive system circuit, and a power battery circuit.

[0076] Controlling the thermal regulating valves in each circuit requiring heat dissipation in step S106 to convert the heating medium into the heat dissipation medium of the circuit requiring heat dissipation may include:

[0077] Controlling a thermal valve of a compressor air conditioning circuit to convert a heating medium into a heat dissipation medium provided to an evaporator in the compressor air conditioning circuit;

[0078] Controlling the electromagnetic expansion valve in the fuel cell circuit to convert the heating medium into the heat dissipation medium provided to the fuel cell circuit;

[0079] Controlling a thermal valve of the electric drive system circuit to convert a heating medium into a heat dissipation medium provided to the electric drive system circuit;

[0080] The thermal valve of the power battery circuit is controlled to convert the heating medium into the heat dissipation medium provided to the power battery circuit.

[0081] Thus, by controlling the thermostatic regulating valve in each circuit, refrigeration for each circuit is achieved.

[0082] It can be understood that the reflux medium can, for example, be compressed by the compressor suction to form a high-temperature and high-pressure gas, and then flow through the condenser to form a high-temperature and high-pressure liquid and flow to each circuit respectively.

[0083] In some embodiments of the present application, step S106 may also include: when the temperature values ​​detected by the temperature sensors of the fuel cell circuit, the electric drive system circuit and the power battery circuit are greater than the upper limit of the temperature value of the respective circuits, controlling the opening of the guide valves of the compressor air-conditioning circuit and each circuit that requires heat dissipation to be maximum.

[0084] And, the thermal management method for a fuel cell engineering vehicle also includes:

[0085] When the fuel cell circuit is a circuit that requires heat dissipation and the temperature value detected by the temperature sensor of the fuel cell circuit reaches the lower temperature limit of the fuel cell, the guide valve connected to the fuel cell circuit is adjusted to reduce the medium flow in the fuel cell circuit.

[0086] Based on the above, in some embodiments of the present application, the fuel cell circuit and the electric drive system circuit respectively include respective water pumps. Before reducing the medium flow in the fuel cell circuit and the electric drive system circuit, the thermal management method for a fuel cell engineering vehicle may also include:

[0087] When the fuel cell circuit is a circuit that needs heat dissipation and the temperature value detected by the temperature sensor of the fuel cell circuit reaches the lower limit of the temperature of the fuel cell, the water pump speed of the fuel cell circuit is lowered to reduce the medium flow in the fuel cell circuit;

[0088] When the electric drive system circuit is a circuit that requires heat dissipation and the temperature value detected by the temperature sensor of the electric drive system circuit reaches the lower temperature limit of the fuel cell, the water pump speed of the fuel cell circuit is lowered to reduce the medium flow in the electric drive system circuit.

[0089] After the water pump speeds of the fuel cell circuit and the electric drive system circuit are reduced, and the temperature values ​​detected by the temperature sensors of each circuit drop to the lower temperature limits of each circuit, the electronic fan speed is reduced, and the opening of the guide valves connecting each circuit is reduced.

[0090] In some embodiments of the present application, during the heat dissipation of the compressor air conditioning circuit, the influence of the supercooling on the cooling capacity can be obtained according to the temperature and pressure data of the PT sensor, and the refrigerant enthalpy can be calculated to obtain the energy efficiency ratio of the thermal management system. If the cooling capacity of the compressor air conditioning circuit meets the demand, the speed of the fan corresponding to the evaporator in the compressor air conditioning circuit is reduced. Finally, when all circuits meet the cooling demand, the speed of the compressor and the speed of the electronic fan corresponding to the electromagnetic expansion valve are reduced.

[0091] The thermal management method for fuel cell engineering vehicles provided in the embodiment of the present application integrates the compressor air-conditioning circuit, the fuel cell circuit, the electric drive system circuit and the power battery circuit, realizes the energy coupling of multiple circuits, and maximizes the system energy utilization rate through the deployment of this method to improve the vehicle endurance.

[0092] An embodiment of the present application also provides a controller for a fuel cell engineering vehicle, which is configured to call instructions from a memory and implement the thermal management method for a fuel cell engineering vehicle provided in accordance with any of the above embodiments when executing the instructions.

[0093] See also Figure 2 The present application also provides a thermal management system for a fuel cell engineering vehicle, including:

[0094] Compressor air conditioning circuit, including:

[0095] A compressor; a condenser connected to the compressor; a second four-way valve, a second connection port of the second four-way valve connected to the condenser; a first four-way valve, a first connection port of the first four-way valve connected to a fourth connection port of the second four-way valve; a second temperature sensor connected to the third connection port of the first four-way valve; a first thermal valve connected to the second temperature sensor;

[0096] an evaporator connected to a first thermal valve; a first temperature sensor connected to the evaporator and to a compressor;

[0097] Fuel cell circuit, including:

[0098] an electromagnetic expansion valve connected to the second connection port of the first four-way valve; a third four-way valve, wherein the first connection port of the third four-way valve is connected to the electromagnetic expansion valve; a fuel cell, connected to the third connection port of the third four-way valve; a fourth temperature sensor, connected to the fuel cell; a fifth four-way valve, wherein the fourth connection port of the fifth four-way valve is connected to the fourth temperature sensor; a fourth four-way valve, wherein the second connection port of the fourth four-way valve is connected to the third connection port of the fifth four-way valve, and the fourth connection port of the fourth four-way valve is connected to the fourth connection port of the first four-way valve;

[0099] The electric drive system circuit includes:

[0100] a third thermal valve connected to the second connection port of the third four-way valve; an electric drive system connected to the third thermal valve; a fifth temperature sensor connected to the electric drive system, and the second connection port of the fifth four-way valve connected to the fifth temperature sensor; a fifth four-way valve, the second connection port of the fifth four-way valve connected to the fifth temperature sensor, and the fourth connection port of the fifth four-way valve connected to the fuel cell;

[0101] Power battery circuit, including:

[0102] Including a second thermal valve connected to the second connection port of the first four-way valve; a plate heat exchanger connected to the second thermal valve; a sixth four-way valve, the third connection port of the sixth four-way valve is connected to the plate heat exchanger, the first connection port of the sixth four-way valve is connected to the fourth connection port of the third four-way valve, and the second connection port of the sixth four-way valve is connected to the first connection port of the fifth four-way valve; a second three-way valve, the second connection port of the second three-way valve is connected to the plate heat exchanger; a battery pack, connected to the third connection port of the second three-way valve; a sixth temperature sensor, connected to the battery pack; a third three-way valve, the second connection port of the third three-way valve is connected to the sixth temperature sensor, the first connection port of the third three-way valve is connected to the fourth connection port of the third four-way valve, and the first connection port of the third three-way valve is connected to the fourth connection port of the fourth four-way valve; the fourth four-way valve,

[0103] The second connection port of the fourth four-way valve is connected to the third connection port of the fifth four-way valve, the third connection port of the fourth four-way valve is connected to the first connection port of the second three-way valve, the first connection port of the fourth four-way valve is connected to the fourth connection port of the third four-way valve, and the fourth connection port of the fourth four-way valve is connected to the fourth connection port of the first four-way valve;

[0104] a controller configured to obtain a second temperature value of the second temperature sensor, a fourth temperature value of the fourth temperature sensor, a fifth temperature value of the fifth temperature sensor, and a sixth temperature value of the sixth temperature sensor;

[0105] The controller determines a circuit that needs to be heated and a circuit that needs to be cooled in the thermal management system according to the fourth temperature value, the fifth temperature value and the sixth temperature value;

[0106] The controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit that needs to be heated, so as to connect the compressor air conditioning circuit and each circuit that needs to be heated, and provide heating medium for the circuit that needs to be heated;

[0107] The controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, and controls the thermal regulating valve in each circuit requiring heat dissipation to convert the heating medium into the heat dissipation medium of the circuit requiring heat dissipation;

[0108] The controller determines the temperature of the return medium of the circuit requiring heat dissipation according to the temperature value detected by the temperature sensor in the circuit requiring heat dissipation;

[0109] When the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, the controller controls the corresponding multi-way valve to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature.

[0110] Understandably, if Figure 2 As shown, the four-way valve is provided with a first connection port and a third connection port in the transverse direction, and a second connection port and a fourth connection port in the longitudinal direction.

[0111] The thermal management system and method for fuel cell engineering vehicles provided in the embodiments of the present application. The system uses a set of heat pumps to achieve cooling and heating of multiple circuits, and the heating and cooling circuits are coupled to each other, using the least thermal management components to maximize the energy utilization of the vehicle and improve the endurance. The system also adds temperature sensors for each circuit to detect the temperature of the coolant in different systems.

[0112] The fuel cell has a heating wire for self-heating, the air conditioner has a PTC heater for self-heating, and the power battery has a heating film for self-heating. Under different working conditions, it can be determined whether to turn on self-heating according to the heating needs of each system. If only the waste heat from other circuits is used for heating and the temperature sensor signal feedback is received to meet its own heating needs, there is no need to turn on self-heating.

[0113] The components of the heat pump system, i.e. the thermal management system, are composed of heating components, heating pipelines, cooling components and cooling pipelines. Specifically, they may include compressors, condensers, water pumps, fans, evaporators, plate heat exchangers, thermal valves, solenoid valves, stop valves, water supply kettles, three-way valves, four-way valves and PT sensors.

[0114] A thermal management system is used to enable multiple systems of the vehicle to work collaboratively under different working conditions. On the one hand, the cooling of the cab air-conditioning system, the cooling of the power battery, the electric drive system and the heat dissipation of the fuel cell are integrated. The power battery cooling can be achieved through liquid-to-liquid heat exchange with the low-temperature liquid flowing out of the thermal valve 3 through a plate heat exchanger; on the other hand, the heating of the fuel cell, the heating of the cab air-conditioning and the heating of the power battery are integrated. For these three systems, self-heating will not be started when the waste heat can meet their own needs.

[0115] The present invention can realize a high degree of integration of the vehicle thermal management system with a set of heat pump systems, realize reasonable distribution and utilization of energy among systems under the deployment of the controller, and maximize the utilization rate of system waste heat recovery.

[0116] For the compressor air-conditioning circuit, the fan corresponding to the evaporator can be turned on and the electronic fan of the electromagnetic expansion valve of the fuel cell circuit can be turned on. The refrigerant forms a high-temperature and high-pressure gas under the action of the compressor, releases heat through the condenser to form a liquid, passes through the regulating valve, and forms a low-temperature liquid under the action of the thermal valve. The water pump is turned on to drive the low-temperature liquid to realize the cooling of the fuel cell, the electric drive system, the power battery, and the air conditioning. The battery cooling is achieved by liquid-liquid heat exchange through a plate heat exchanger.

[0117] For system heating, the water pump can be turned on by adjusting the valve and the first thermal valve can be closed to drive the high-temperature liquid flowing out of the condenser to heat the fuel cell. The fan regulating valve can be turned on to achieve air conditioning heating. The third thermal valve can be closed to achieve liquid-liquid heat exchange through the plate heat exchanger to heat the battery. The thermal management system for fuel cell engineering vehicles provided in this application can achieve heating and cooling of multiple systems of the vehicle by using a heat pump system through flexible switching of valves.

[0118] See also Figure 3 In some embodiments of the present application, the circuits that need to dissipate heat include: a fuel cell circuit, an electric drive system circuit, and a power battery circuit;

[0119] Controlling a multi-way valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, including:

[0120] Controlling the second four-way valve to operate so that the second connecting port and the fourth connecting port of the second four-way valve are connected;

[0121] Controlling the first four-way valve to operate so that the first connection port and the third connection port of the first four-way valve are in communication, and controlling the first four-way valve to operate so that the first connection port and the second connection port of the first four-way valve are in communication;

[0122] Control the third four-way valve to make the first connection port and the third connection port of the third four-way valve communicate with each other.

[0123] controlling the third four-way valve to operate so that the first connection port and the second connection port of the third four-way valve are connected;

[0124] The fifth four-way valve is controlled to operate so that the second connection port and the third connection port of the fifth four-way valve are connected.

[0125] controlling the fifth four-way valve to operate so that the fourth connection port and the third connection port of the fifth four-way valve are connected;

[0126] The fourth four-way valve is controlled to operate so that the second connection port of the fourth four-way valve is connected to the first connection port of the fourth four-way valve.

[0127] The first connection port, the third connection port and the fourth connection port are connected;

[0128] Control the first four-way valve to make the fourth connection port of the first four-way valve communicate with the second connection port, and control

[0129] Controlling the first four-way valve to operate so that the fourth connection port and the third connection port of the first four-way valve are connected;

[0130] The third four-way valve is controlled to operate so that the fourth connection port of the third four-way valve is connected to the second connection port.

[0131] controlling the third four-way valve to operate so that the fourth connection port of the third four-way valve is connected to the third connection port;

[0132] Control the second three-way valve to make the first connection port and the third connection port of the second three-way valve communicate with each other.

[0133] Controlling the second three-way valve to operate so that the second connection port and the third connection port of the second three-way valve are connected;

[0134] Control the third three-way valve to make the second connection port of the third three-way valve communicate with the first connection port.

[0135] Controlling the action of the third three-way valve so that the second connection port and the third connection port of the third three-way valve are connected;

[0136] Controlling the sixth four-way valve to operate so that the third connection port and the first connection port of the sixth four-way valve are connected;

[0137] Control the thermal control valves in each circuit that needs heat dissipation, including:

[0138] Control the electromagnetic expansion valve, the first thermal valve, the second thermal valve and the third thermal valve for refrigeration.

[0139] See also Figure 4 In some embodiments of the present application, the circuits that need to be heated include: fuel cell circuits and power battery circuits; the circuits that need to dissipate heat include electric drive system circuits; compressor air conditioning circuit self-heating;

[0140] Controlling a multi-way valve connecting the compressor air conditioning circuit and each circuit requiring heating to connect the compressor air conditioning circuit and each circuit requiring heating, including:

[0141] Controlling the second four-way valve to operate so that the fourth connection port of the second four-way valve is connected to the plate heat exchanger;

[0142] Controlling the second four-way valve to operate so that the second connecting port and the fourth connecting port of the second four-way valve are connected;

[0143] Controlling the first four-way valve to operate so that the first connection port and the third connection port of the first four-way valve are in communication, and controlling the first four-way valve to operate so that the first connection port and the second connection port of the first four-way valve are in communication;

[0144] Controlling the third four-way valve to operate so that the first connection port of the third four-way valve is connected to the third connection port, and controlling the third four-way valve to operate so that the first connection port of the third four-way valve is connected to the second connection port;

[0145] Controlling the fifth four-way valve to operate so that the second connection port and the third connection port of the fifth four-way valve are in communication, and controlling the fifth four-way valve to operate so that the fourth connection port and the third connection port of the fifth four-way valve are in communication;

[0146] Controlling the fourth four-way valve to operate so that the second connection port of the fourth four-way valve is connected to the first connection port, the third connection port and the fourth connection port of the fourth four-way valve respectively;

[0147] Controlling the first four-way valve to operate so that the fourth connection port of the first four-way valve is connected to the second connection port, and controlling the first four-way valve to operate so that the fourth connection port of the first four-way valve is connected to the third connection port;

[0148] Controlling the third four-way valve to operate so that the fourth connection port of the third four-way valve is connected to the second connection port, and controlling the third four-way valve to operate so that the fourth connection port of the third four-way valve is connected to the third connection port;

[0149] Controlling the second three-way valve to operate so that the first connection port and the third connection port of the second three-way valve are in communication, and controlling the second three-way valve to operate so that the second connection port and the third connection port of the second three-way valve are in communication;

[0150] Controlling the third three-way valve to operate so that the second connection port of the third three-way valve is connected to the first connection port, and controlling the third three-way valve to operate so that the second connection port of the third three-way valve is connected to the third connection port;

[0151] The sixth four-way valve is controlled to operate so that the third connection port and the first connection port of the sixth four-way valve are in communication with each other.

[0152] Controlling the thermal regulating valves in each circuit that needs heat dissipation includes: controlling the third thermal valve to cool.

[0153] In some embodiments of the present application, when the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, controlling the corresponding diversion valve to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature includes:

[0154] When the temperature value detected by the fifth temperature sensor meets the heating requirement temperature of the power battery circuit, the fifth four-way valve is controlled to operate so that the second connection port and the third connection port of the fifth four-way valve are connected, and the second three-way valve is controlled so that the first connection port and the third connection port of the second three-way valve are connected, so that the reflux medium flows into the battery pack;

[0155] When the temperature value detected by the fifth sensor meets the heating requirement temperature of the fuel cell circuit, the fifth four-way valve is controlled to operate so that the first connection port and the second connection port of the fifth four-way valve are connected, and the sixth four-way valve is controlled to operate so that the second connection port and the first connection port of the sixth four-way valve are connected.

[0156] See also Figure 4 In some embodiments of the present application, the thermal management system for a fuel cell engineering vehicle further includes:

[0157] A ptc heater is connected between the plate heat exchanger and the first connection port of the fifth four-way valve;

[0158] The controller is configured to control the plate heat exchanger to be connected to the PTC heater, and to control the PTC heater to be connected to the first connection port of the fifth four-way valve and the third connection port of the second four-way valve;

[0159] The controller is configured to control the ptc heater to generate heat.

[0160] In some embodiments of the present application, controlling the multi-way valve connecting the compressor air conditioning circuit and each circuit that needs to be heated to connect the compressor air conditioning circuit and each circuit that needs to be heated, and providing a heating medium for the circuit that needs to be heated, also includes:

[0161] The controller controls the channel valves of the first connection port and the third connection port of the third four-way valve to have the maximum valve opening, and

[0162] The channel valve openings of the third connection port and the fourth connection port of the third four-way valve are the largest;

[0163] The controller controls the opening of each channel of the second three-way valve to be maximum, and the opening of each channel of the third three-way valve to be maximum;

[0164] The controller controls the electromagnetic expansion valve to control the flow rate at the maximum opening;

[0165] The controller controls the thermal regulating valves in each circuit that needs heat dissipation to convert the heating medium into the heat dissipation medium of the circuit that needs heat dissipation, including:

[0166] The controller controls the third thermal valve to open so as to convert the heating medium into the heat dissipation medium;

[0167] The controller also controls the compressor speed to be set to the maximum, the fan speed corresponding to the evaporator to be set to the maximum, and the fan duty cycle of the fan corresponding to the electromagnetic expansion valve to be set to the maximum;

[0168] The controller also controls the fuel cell to self-heat and controls the power battery to self-heat.

[0169] See also Figure 4 In some embodiments of the present application, the thermal management system for a fuel cell engineering vehicle further includes:

[0170] When the temperature value detected by the fourth temperature sensor rises to the lower temperature limit of the fuel cell circuit, the self-heating of the fuel cell is turned off, and the channels of the first connection port and the third connection port of the third four-way valve and the third connection port of the fifth four-way valve are adjusted to reduce the medium flow in the fuel cell circuit.

[0171] See also Figure 5 In some embodiments of the present application, the fuel cell circuit and the electric drive system circuit are circuits that require heat dissipation, and the power battery circuit is a circuit that requires heating;

[0172] The controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit that needs to be heated to connect the compressor air conditioning circuit and each circuit that needs to be heated, including:

[0173] Controlling the second four-way valve to operate so that the second connecting port and the fourth connecting port of the second four-way valve are connected;

[0174] Controlling the first four-way valve to operate so that the first connecting port and the third connecting port of the first four-way valve are connected;

[0175] Controlling the second three-way valve to operate so that the second connection port and the third connection port of the second three-way valve are connected;

[0176] Controlling the action of the third three-way valve so that the second connection port and the third connection port of the third three-way valve are connected;

[0177] Controlling the second four-way valve to operate so that the first connection port of the second four-way valve is connected to the plate heat exchanger, and controlling the second four-way valve to operate so that the first connection port and the fourth connection port of the second four-way valve are connected;

[0178] The controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, including:

[0179] Controlling the first four-way valve to operate so that the first connecting port and the second connecting port of the first four-way valve are connected;

[0180] Controlling the third four-way valve to operate so that the first connection port and the second connection port of the third four-way valve are connected;

[0181] Controlling the third four-way valve to operate so that the first connection port and the third connection port of the third four-way valve are connected;

[0182] Controlling the fifth four-way valve to operate so that the second connection port and the third connection port of the fifth four-way valve are in communication, and controlling the fifth four-way valve to operate so that the fourth connection port and the third connection port of the fifth four-way valve are in communication;

[0183] The fourth four-way valve is controlled to operate so that the second connection port and the fourth connection port of the fourth four-way valve are connected.

[0184] See also Figure 5 In some embodiments of the present application, when the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, controlling the corresponding diversion valve to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature includes:

[0185] When the temperature value detected by the fourth temperature sensor meets the heating requirement temperature of the power battery circuit, the controller controls the fifth four-way valve to operate so that the third connection port of the fifth four-way valve is connected to the fourth connection port, controls the fourth four-way valve to operate so that the second connection port of the fourth four-way valve is connected to the third connection port, and controls the second three-way valve to operate so that the first connection port of the second three-way valve is connected to the third connection port;

[0186] When the temperature value detected by the fifth temperature sensor meets the heating requirement temperature of the power battery circuit, the controller controls the fifth four-way valve to operate so that the second connection port and the third connection port of the fifth four-way valve are connected, controls the fourth four-way valve to operate so that the second connection port and the third connection port of the fourth four-way valve are connected, and controls the second three-way valve to operate so that the first connection port and the third connection port of the second three-way valve are connected.

[0187] See also Figure 5 In some embodiments of the present application, the controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, and further includes:

[0188] When the temperature value detected by the fourth temperature sensor rises to the upper temperature limit of the fuel cell circuit, the controller controls the channel valve openings of the first connection port and the third connection port of the third four-way valve to be maximum, and controls the channel valve openings of the fourth connection port and the third connection port of the fifth four-way valve to be maximum;

[0189] When the temperature value detected by the fifth temperature sensor rises to the upper temperature limit of the electric drive system, the controller controls the channel valve openings of the first connection port and the second connection port of the third four-way valve to be maximum, and controls the channel valve openings of the second connection port and the third connection port of the fifth four-way valve to be maximum;

[0190] When the temperature value detected by the fourth temperature sensor rises to the upper temperature limit of the fuel cell circuit and when the temperature value detected by the fifth temperature sensor rises to the upper temperature limit of the electric drive system, the controller controls the opening of the electromagnetic expansion valve to the maximum and converts the heating medium into the heat dissipation medium.

[0191] See also Figure 5 In some embodiments of the present application, the thermal management system for a fuel cell engineering vehicle further includes:

[0192] When the temperature value detected by the fourth temperature sensor drops to the lower temperature limit of the fuel cell circuit, the controller controls the channel valve openings of the first connection port and the third connection port of the third four-way valve to decrease, and controls the channel valve openings of the fourth connection port and the third connection port of the fifth four-way valve to decrease;

[0193] When the temperature value detected by the fifth temperature sensor drops to the lower temperature limit of the electric drive system, the controller controls the channel valve opening of the first connection port and the second connection port of the third four-way valve to decrease, and controls the channel valve opening of the second connection port and the third connection port of the fifth four-way valve to decrease.

[0194] An embodiment of the present application also provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute the above-mentioned method for thermal management of a fuel cell engineering vehicle.

[0195] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0196] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0197] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0198] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0199] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0200] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0201] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0202] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0203] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A thermal management method for a fuel cell engineering vehicle, characterized in that: The thermal management system of the fuel cell engineering vehicle comprises: a compressor air conditioning circuit, a fuel cell circuit, an electric drive system circuit, and a power battery circuit, each of which is connected via a diversion valve, and each of which comprises its own temperature sensor; the method comprises: Determining a circuit that needs to be heated and a circuit that needs to be cooled in the thermal management system according to the temperature values ​​detected by the respective temperature sensors; Controlling the guide valve connecting the compressor air conditioning circuit and each circuit that needs to be heated to connect the compressor air conditioning circuit and each circuit that needs to be heated, and providing heating medium for the circuit that needs to be heated; Controlling the guide valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, and controlling the thermal regulating valve in each circuit requiring heat dissipation to convert the heating medium into the heat dissipation medium of the circuit requiring heat dissipation; Determining the temperature of the reflux medium of the circuit requiring heat dissipation according to the temperature value detected by the temperature sensor in the circuit requiring heat dissipation; When the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, the corresponding diversion valve is controlled to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature.

2. The method according to claim 1, characterized in that The circuits that need to be heated include: the fuel cell circuit and the power battery circuit, and the circuits that need to dissipate heat include the electric drive system circuit; The control of connecting the compressor air conditioning circuit and the guide valve of each circuit that needs to be heated, so as to connect the compressor air conditioning circuit and each circuit that needs to be heated, and provide heating medium for the circuit that needs to be heated, includes: Controlling the guide valve connecting the compressor air conditioning circuit and the fuel cell circuit to connect the fuel cell and the compressor air conditioning circuit; The compressor air conditioning circuit is self-heated by the heating medium, and the heating medium is provided to the fuel cell via a diversion valve connecting the fuel cell and the compressor air conditioning circuit; When the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, controlling the corresponding diversion valve to make the reflux medium flow into the circuit that needs to be heated corresponding to the heating requirement temperature includes: When the temperature of the return medium of the electric drive system circuit or the power battery circuit meets the heating requirement temperature of the fuel cell circuit, the corresponding guide valve is controlled to allow the return medium to flow into the fuel cell circuit.

3. The method according to claim 2, characterized in that Also includes: In the case where the fuel cell circuit is the circuit that needs to be heated, the fuel cell starts self-heating until the temperature value detected by the temperature sensor of the fuel cell circuit reaches the lower limit of the fuel cell temperature; When the temperature value detected by the temperature sensor of the fuel cell circuit reaches the lower limit of the fuel cell temperature, the guide valve connected to the fuel cell circuit is adjusted to reduce the medium flow in the fuel cell circuit.

4. The method according to claim 1, characterized in that: The fuel cell circuit and the electric drive system circuit are the circuits that need heat dissipation, and the power battery circuit is the circuit that needs heating; When the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, controlling the corresponding diversion valve to make the reflux medium flow into the circuit that needs to be heated corresponding to the heating requirement temperature includes: When the temperature of the return medium of the fuel cell circuit or the electric drive system circuit meets the heating requirement temperature of the circuit to be heated, the corresponding diversion valve is controlled to allow the return medium to flow into the compressor air-conditioning circuit and / or the power battery circuit.

5. The method according to claim 2 or 4, characterized in that: Also includes: In the case where the power battery circuit is the circuit that needs to be heated, the power battery circuit starts self-heating until the temperature value detected by the temperature sensor of the power battery circuit reaches the lower limit of the power battery temperature; When the temperature value detected by the temperature sensor of the power battery circuit reaches the lower limit of the power battery temperature, the guide valve connected to the power battery circuit is adjusted to reduce the medium flow in the fuel cell circuit.

6. The method according to claim 1, characterized in that The circuits that need to dissipate heat include: the compressor air conditioning circuit, the fuel cell circuit, the electric drive system circuit, and the power battery circuit; The step of controlling the thermal regulating valves in the circuits that need heat dissipation to convert the heating medium into the heat dissipation medium of the circuits that need heat dissipation includes: controlling a thermal valve of the compressor air conditioning circuit to convert the heating medium into a heat dissipation medium provided to an evaporator in the compressor air conditioning circuit; controlling an electromagnetic expansion valve in the fuel cell circuit to convert the heating medium into a heat dissipation medium provided to the fuel cell circuit; Controlling a thermal valve of the electric drive system circuit to convert the heating medium into a heat dissipation medium provided to the electric drive system circuit; The thermal valve of the power battery circuit is controlled to convert the heating medium into a heat dissipation medium provided to the power battery circuit.

7. The method according to claim 6, characterized in that The control of connecting the compressor air conditioning circuit and the guide valve of each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, and controlling the thermal regulating valve in each circuit requiring heat dissipation to convert the heating medium into the heat dissipation medium of the circuit requiring heat dissipation, further includes: When the temperature values ​​detected by the temperature sensors of the fuel cell circuit, the electric drive system circuit and the power battery circuit are greater than the upper limits of the temperature values ​​of the respective circuits, the openings of the guide valves of the compressor air conditioning circuit and the circuits requiring heat dissipation are controlled to be maximum; The method further comprises: When the fuel cell circuit is the circuit that needs heat dissipation and the temperature value detected by the temperature sensor of the fuel cell circuit reaches the lower limit of the temperature of the fuel cell, adjusting the guide valve connected to the fuel cell circuit to reduce the medium flow in the fuel cell circuit; When the electric drive system circuit is the circuit that requires heat dissipation and the temperature value detected by the temperature sensor of the electric drive system circuit reaches the lower temperature limit of the fuel cell, the water pump speed of the fuel cell circuit is lowered to reduce the medium flow in the electric drive system circuit.

8. The method according to claim 7, characterized in that Also includes: After reducing the medium flow in the fuel cell circuit and the power battery, the fan speed corresponding to the evaporator in the compressor air conditioning circuit is lowered, and the opening of the guide valve of each circuit that needs heat dissipation is reduced.

9. A controller for a fuel cell engineering vehicle, characterized in that: The device is configured to call instructions from a memory and implement the thermal management method for a fuel cell engineering vehicle according to any one of claims 1 to 8 when executing the instructions.

10. A thermal management system for a fuel cell engineering vehicle, characterized in that: include: Compressor air conditioning circuit, including: compressor; a condenser connected to the compressor; a second four-way valve, wherein a second connection port of the second four-way valve is connected to the condenser; a first four-way valve, wherein a first connection port of the first four-way valve is connected to a fourth connection port of the second four-way valve; a second temperature sensor connected to the third connection port of the first four-way valve; a first thermal valve connected to the second temperature sensor; an evaporator connected to the first thermal valve; A first temperature sensor connected to the evaporator and the compressor; Fuel cell circuit, including: an electromagnetic expansion valve connected to the second connection port of the first four-way valve; a third four-way valve, wherein a first connection port of the third four-way valve is connected to the electromagnetic expansion valve; A fuel cell connected to the third connection port of the third four-way valve; a fourth temperature sensor connected to the fuel cell; a fifth four-way valve, wherein a fourth connection port of the fifth four-way valve is connected to the fourth temperature sensor; a fourth four-way valve, wherein the second connection port of the fourth four-way valve is connected to the third connection port of the fifth four-way valve, and the fourth connection port of the fourth four-way valve is connected to the fourth connection port of the first four-way valve; The electric drive system circuit includes: a third thermal valve connected to the second connection port of the third four-way valve; an electric drive system connected to the third thermal valve; a fifth temperature sensor connected to the electric drive system, and the second connection port of the fifth four-way valve is connected to the fifth temperature sensor; a fifth four-way valve, wherein a second connection port of the fifth four-way valve is connected to the fifth temperature sensor, and a fourth connection port of the fifth four-way valve is connected to the fuel cell; Power battery circuit, including: comprising a second thermal valve connected to the second connection port of the first four-way valve; a plate heat exchanger connected to the second thermal valve; a sixth four-way valve, wherein the third connection port of the sixth four-way valve is connected to the plate heat exchanger, the first connection port of the sixth four-way valve is connected to the fourth connection port of the third four-way valve, and the second connection port of the sixth four-way valve is connected to the first connection port of the fifth four-way valve; a second three-way valve, wherein a second connection port of the second three-way valve is connected to the plate heat exchanger; A battery pack connected to the third connection port of the second three-way valve; a sixth temperature sensor, connected to the battery pack; a third three-way valve, wherein the second connection port of the third three-way valve is connected to the sixth temperature sensor, the first connection port of the third three-way valve is connected to the fourth connection port of the third four-way valve, and the first connection port of the third three-way valve is connected to the fourth connection port of the fourth four-way valve; a fourth four-way valve, wherein the second connection port of the fourth four-way valve is connected to the third connection port of the fifth four-way valve, the third connection port of the fourth four-way valve is connected to the first connection port of the second three-way valve, the first connection port of the fourth four-way valve is connected to the fourth connection port of the third four-way valve, and the fourth connection port of the fourth four-way valve is connected to the fourth connection port of the first four-way valve; a controller configured to obtain a second temperature value of the second temperature sensor, a fourth temperature value of the fourth temperature sensor, a fifth temperature value of the fifth temperature sensor, and a sixth temperature value of the sixth temperature sensor; The controller determines a circuit that needs to be heated and a circuit that needs to be cooled in the thermal management system according to the fourth temperature value, the fifth temperature value and the sixth temperature value; The controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit that needs to be heated, so as to connect the compressor air conditioning circuit and each circuit that needs to be heated, and provide heating medium for the circuit that needs to be heated; The controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, and controls the thermal regulating valve in each circuit requiring heat dissipation to convert the heating medium into the heat dissipation medium of the circuit requiring heat dissipation; The controller determines the temperature of the return medium of the circuit requiring heat dissipation according to the temperature value detected by the temperature sensor in the circuit requiring heat dissipation; When the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, the controller controls the corresponding multi-way valve to allow the reflux medium to flow into the circuit that needs to be heated corresponding to the heating requirement temperature.

11. The system according to claim 10, characterized in that The circuits that need to dissipate heat include: the fuel cell circuit, the electric drive system circuit, and the power battery circuit; The multi-way valve controlling the connection between the compressor air conditioning circuit and each circuit requiring heat dissipation, so as to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, comprises: Controlling the second four-way valve to operate so that the second connecting port and the fourth connecting port of the second four-way valve are connected; Controlling the first four-way valve to operate so that the first connection port and the third connection port of the first four-way valve are in communication, and controlling the first four-way valve to operate so that the first connection port and the second connection port of the first four-way valve are in communication; Controlling the third four-way valve to operate so that the first connection port and the third connection port of the third four-way valve are in communication, and controlling the third four-way valve to operate so that the first connection port and the second connection port of the third four-way valve are in communication; Controlling the fifth four-way valve to operate so that the second connection port and the third connection port of the fifth four-way valve are in communication, and controlling the fifth four-way valve to operate so that the fourth connection port and the third connection port of the fifth four-way valve are in communication; Controlling the fourth four-way valve to operate so that the second connection port of the fourth four-way valve is connected to the first connection port, the third connection port and the fourth connection port of the fourth four-way valve respectively; Controlling the first four-way valve to operate so that the fourth connection port of the first four-way valve is connected to the second connection port, and controlling the first four-way valve to operate so that the fourth connection port of the first four-way valve is connected to the third connection port; Controlling the third four-way valve to operate so that the fourth connection port of the third four-way valve is connected to the second connection port, and controlling the third four-way valve to operate so that the fourth connection port of the third four-way valve is connected to the third connection port; Controlling the second three-way valve to operate so that the first connection port and the third connection port of the second three-way valve are in communication, and controlling the second three-way valve to operate so that the second connection port and the third connection port of the second three-way valve are in communication; Controlling the third three-way valve to operate so that the second connection port of the third three-way valve is connected to the first connection port, and controlling the third three-way valve to operate so that the second connection port of the third three-way valve is connected to the third connection port; Controlling the sixth four-way valve to operate so that the third connection port and the first connection port of the sixth four-way valve are connected; The method of controlling the thermal regulating valves in each of the circuits requiring heat dissipation comprises: The electromagnetic expansion valve, the first thermal valve, the second thermal valve and the third thermal valve are controlled to provide cooling.

12. The system according to claim 10, characterized in that The circuits that need to be heated include: the fuel cell circuit and the power battery circuit; the circuits that need to dissipate heat include the electric drive system circuit; the compressor air conditioning circuit is self-heated; The multi-way valve controlling the connection between the compressor air conditioning circuit and each circuit that needs to be heated, so as to connect the compressor air conditioning circuit and each circuit that needs to be heated, comprises: Controlling the second four-way valve to operate so that the fourth connection port of the second four-way valve is connected to the plate heat exchanger; Controlling the second four-way valve to operate so that the second connecting port and the fourth connecting port of the second four-way valve are connected; Controlling the first four-way valve to operate so that the first connection port and the third connection port of the first four-way valve are in communication, and controlling the first four-way valve to operate so that the first connection port and the second connection port of the first four-way valve are in communication; Controlling the third four-way valve to operate so that the first connection port and the third connection port of the third four-way valve are in communication, and controlling the third four-way valve to operate so that the first connection port and the second connection port of the third four-way valve are in communication; Controlling the fifth four-way valve to operate so that the second connection port and the third connection port of the fifth four-way valve are in communication, and controlling the fifth four-way valve to operate so that the fourth connection port and the third connection port of the fifth four-way valve are in communication; Controlling the fourth four-way valve to operate so that the second connection port of the fourth four-way valve is connected to the first connection port, the third connection port and the fourth connection port of the fourth four-way valve respectively; Controlling the first four-way valve to operate so that the fourth connection port of the first four-way valve is connected to the second connection port, and controlling the first four-way valve to operate so that the fourth connection port of the first four-way valve is connected to the third connection port; Controlling the third four-way valve to operate so that the fourth connection port of the third four-way valve is connected to the second connection port, and controlling the third four-way valve to operate so that the fourth connection port of the third four-way valve is connected to the third connection port; Controlling the second three-way valve to operate so that the first connection port and the third connection port of the second three-way valve are in communication, and controlling the second three-way valve to operate so that the second connection port and the third connection port of the second three-way valve are in communication; Controlling the third three-way valve to operate so that the second connection port of the third three-way valve is connected to the first connection port, and controlling the third three-way valve to operate so that the second connection port of the third three-way valve is connected to the third connection port; The sixth four-way valve is controlled to operate so that the third connection port and the first connection port of the sixth four-way valve are in communication with each other. The method of controlling the thermal regulating valves in each of the circuits requiring heat dissipation comprises: The third thermal valve is controlled to provide cooling.

13. The method according to claim 12, characterized in that When the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, controlling the corresponding diversion valve to make the reflux medium flow into the circuit that needs to be heated corresponding to the heating requirement temperature includes: When the temperature value detected by the fifth temperature sensor meets the heating requirement temperature of the power battery circuit, the fifth four-way valve is controlled to operate so that the second connection port and the third connection port of the fifth four-way valve are connected, and the second three-way valve is controlled so that the first connection port and the third connection port of the second three-way valve are connected, so that the reflux medium flows into the battery pack; When the temperature value detected by the fifth sensor meets the heating requirement temperature of the fuel cell circuit, the fifth four-way valve is controlled to operate so that the first connection port and the second connection port of the fifth four-way valve are connected, and the sixth four-way valve is controlled to operate so that the second connection port and the first connection port of the sixth four-way valve are connected.

14. The system according to claim 12, characterized in that The system further comprises: A ptc heater connected between the plate heat exchanger and the first connecting port of the fifth four-way valve; The controller is configured to control the plate heat exchanger to communicate with the PTC heater, and to control the PTC heater to communicate with the first connection port of the fifth four-way valve and the third connection port of the second four-way valve; The controller is configured to control the ptc heater to generate heat.

15. The system according to claim 14, characterized in that The control of the multi-way valve connecting the compressor air conditioning circuit and each circuit that needs to be heated, so as to connect the compressor air conditioning circuit and each circuit that needs to be heated, and provide a heating medium for the circuit that needs to be heated, also includes: The controller controls the channel valves of the first connection port and the third connection port of the third four-way valve to have the largest openings, and the channel valves of the third connection port and the fourth connection port of the third four-way valve to have the largest openings; The controller controls the opening degree of each channel of the second three-way valve to be the maximum, and the opening degree of each channel of the third three-way valve to be the maximum; The controller controls the electromagnetic expansion valve to perform flow control at the maximum opening; The controller controls the thermal regulating valve in each circuit that needs heat dissipation to convert the heating medium into the heat dissipation medium of the circuit that needs heat dissipation, including: The controller controls the third thermal valve to open, so as to convert the heating medium into the heat dissipation medium; The controller also controls the speed of the compressor to be set to the maximum, the speed of the fan corresponding to the evaporator to be the maximum, and the fan duty cycle of the fan corresponding to the electromagnetic expansion valve to be set to the maximum; The controller also controls the fuel cell to self-heat, and controls the power battery to self-heat.

16. The system according to claim 15, characterized in that Also includes: When the temperature value detected by the fourth temperature sensor rises to the lower temperature limit of the fuel cell circuit, the self-heating of the fuel cell is turned off, and the channels of the first connection port and the third connection port of the third four-way valve and the third connection port of the fifth four-way valve are adjusted to reduce the medium flow in the fuel cell circuit.

17. The system according to claim 10, characterized in that The fuel cell circuit and the electric drive system circuit are the circuits that need heat dissipation, and the power battery circuit is the circuit that needs heating; The controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit that needs to be heated to connect the compressor air conditioning circuit and each circuit that needs to be heated, including: Controlling the second four-way valve to operate so that the second connecting port and the fourth connecting port of the second four-way valve are connected; Controlling the first four-way valve to operate so that the first connection port and the third connection port of the first four-way valve are connected; Controlling the second three-way valve to operate so that the second connection port and the third connection port of the second three-way valve are connected; Controlling the third three-way valve to operate so that the second connection port and the third connection port of the third three-way valve are in communication; Controlling the second four-way valve to operate so that the first connection port of the second four-way valve is in communication with the plate heat exchanger, and controlling the second four-way valve to operate so that the first connection port of the second four-way valve is in communication with the fourth connection port; The controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, including: Controlling the first four-way valve to operate so that the first connecting port and the second connecting port of the first four-way valve are connected; Controlling the third four-way valve to operate so that the first connection port and the second connection port of the third four-way valve are connected; Controlling the third four-way valve to operate so that the first connection port and the third connection port of the third four-way valve are in communication; Controlling the fifth four-way valve to operate so that the second connection port and the third connection port of the fifth four-way valve are in communication, and controlling the fifth four-way valve to operate so that the fourth connection port and the third connection port of the fifth four-way valve are in communication; The fourth four-way valve is controlled to operate so that the second connection port and the fourth connection port of the fourth four-way valve are connected.

18. The system according to claim 17, characterized in that When the temperature of the reflux medium meets the heating requirement temperature of the circuit that needs to be heated, controlling the corresponding diversion valve to make the reflux medium flow into the circuit that needs to be heated corresponding to the heating requirement temperature includes: In the case where the temperature value detected by the fourth temperature sensor meets the heating requirement temperature of the power battery circuit, the controller controls the fifth four-way valve to operate so that the third connection port and the fourth connection port of the fifth four-way valve are connected, controls the fourth four-way valve to operate so that the second connection port and the third connection port of the fourth four-way valve are connected, and controls the second three-way valve to operate so that the first connection port and the third connection port of the second three-way valve are connected; When the temperature value detected by the fifth temperature sensor meets the heating requirement temperature of the power battery circuit, the controller controls the fifth four-way valve to operate so that the second connection port and the third connection port of the fifth four-way valve are connected, controls the fourth four-way valve to operate so that the second connection port and the third connection port of the fourth four-way valve are connected, and controls the second three-way valve to operate so that the first connection port and the third connection port of the second three-way valve are connected.

19. The system according to claim 17, characterized in that The controller controls the multi-way valve connecting the compressor air conditioning circuit and each circuit requiring heat dissipation to connect the compressor air conditioning circuit and each circuit requiring heat dissipation, and further includes: When the temperature value detected by the fourth temperature sensor rises to the upper temperature limit of the fuel cell circuit, the controller controls the channel valve openings of the first connection port and the third connection port of the third four-way valve to be maximized, and controls the channel valve openings of the fourth connection port and the third connection port of the fifth four-way valve to be maximized; When the temperature value detected by the fifth temperature sensor rises to the upper temperature limit of the electric drive system, the controller controls the channel valve openings of the first connection port and the second connection port of the third four-way valve to be maximum, and controls the channel valve openings of the second connection port and the third connection port of the fifth four-way valve to be maximum; When the temperature value detected by the fourth temperature sensor rises to the upper temperature limit of the fuel cell circuit and the temperature value detected by the fifth temperature sensor rises to the upper temperature limit of the electric drive system, the controller controls the opening of the electromagnetic expansion valve to be set to the maximum and converts the heating medium into the heat dissipation medium.

20. The system according to claim 19, characterized in that Also includes: When the temperature value detected by the fourth temperature sensor drops to the lower temperature limit of the fuel cell circuit, the controller controls the channel valve openings of the first connection port and the third connection port of the third four-way valve to decrease, and controls the channel valve openings of the fourth connection port and the third connection port of the fifth four-way valve to decrease; When the temperature value detected by the fifth temperature sensor drops to the lower temperature limit of the electric drive system, the controller controls the channel valve opening of the first connection port and the second connection port of the third four-way valve to decrease, and controls the channel valve opening of the second connection port and the third connection port of the fifth four-way valve to decrease.

21. A machine-readable storage medium, characterized in that: The machine-readable storage medium stores instructions for causing a machine to execute the thermal management method for a fuel cell engineering vehicle according to any one of claims 1 to 8.

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