A fuel cell temperature control method, device, equipment and storage medium

Abstract

The present invention provides a fuel cell temperature control method, device, equipment and storage medium. The method includes obtaining a heat change value of a target fuel cell, and its inlet target temperature, inlet actual temperature, temperature difference target value, outlet actual temperature and ambient temperature, obtaining an inlet predicted temperature and an inlet temperature feedforward control signal based on the outlet actual temperature, generating an inlet temperature feedback control signal according to the inlet actual temperature and a preset temperature feedback control loop, obtaining an outlet predicted temperature based on the ambient temperature and the heat change value, and further obtaining an inlet and outlet temperature difference feedforward control signal in combination with the inlet predicted temperature and the temperature difference target value, generating an inlet and outlet temperature difference feedback control signal according to the temperature difference target value and the preset temperature difference feedback control loop, so as to adjust the temperature of the target fuel cell through the above-mentioned signal; adjusting the inlet / outlet temperature of the fuel cell at the same time through the feedforward control signal and the feedback control signal, so as to greatly improve the accuracy of its temperature control.

Description

Technical Field

[0001] The present application relates to the technical field of fuel cells for energy vehicles, and in particular to a fuel cell temperature control method, device, equipment and storage medium. Background Art

[0002] Fuel cell vehicles have attracted widespread attention from domestic and foreign universities and enterprises due to their advantages such as no pollution, zero emissions, high efficiency and fast fuel filling speed. Compared with fuel engines and power batteries, fuel cells have higher requirements for operating temperature, and the thermal management system has greater difficulty in controlling their temperature. In the actual working process, the temperature of the fuel cell is controlled by controlling the coolant temperature. The inlet temperature of the fuel cell coolant is related to the power generated by the fuel cell, and the inlet temperature needs to be controlled at a certain temperature value, and the temperature difference between the coolant outlet temperature and the inlet temperature is also controlled at a certain temperature difference value. If the temperature control effect of the fuel cell is poor, it will affect the performance output of the fuel cell and accelerate the attenuation of the fuel cell, so temperature control is a very important technology for the fuel cell system.

[0003] Since the temperature of the fuel cell coolant has a time lag, controlling the inlet and outlet temperatures by controlling the actuator of the thermal management system according to the real-time temperature error will result in poor control accuracy. Therefore, a combined feedforward and feedback control is usually used to improve the temperature control accuracy and response speed. For example, a proton exchange membrane fuel cell temperature control method proposed in patent CN115966729 A obtains the final control value of the actuator by weighted processing of the feedback control value and the feedforward control value, or a highly adaptable fuel cell thermal management control method and system proposed in patent CN 116053534 A improves the temperature control accuracy by feedforward. However, the above-mentioned patents do not consider the impact on the energy consumption, i.e., the life of the thermal management system under the premise of controlling the fuel cell temperature, which results in high system energy consumption and short life. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the present invention provides a fuel cell temperature control method, device, equipment and storage medium to solve the technical problem of high system energy consumption and short life due to failure to consider the impact on the energy consumption and life of the thermal management system when controlling the fuel cell temperature.

[0005] The present invention provides a fuel cell temperature control method, the method comprising: obtaining a heat change value of a target fuel cell and temperature parameters of the target fuel cell, the temperature parameters comprising an inlet target temperature, an actual inlet temperature, a temperature difference target value, an actual outlet temperature, and an ambient temperature; predicting the future inlet temperature of the target fuel cell based on the actual outlet temperature to obtain an inlet predicted temperature, calculating the inlet predicted temperature and the inlet target temperature to obtain an inlet temperature feedforward control signal, and generating an inlet temperature feedback control signal according to the actual inlet temperature and a preset temperature feedback control loop; predicting the future outlet temperature of the target fuel cell based on the ambient temperature and the heat change value to obtain an outlet predicted temperature, calculating the outlet predicted temperature, the inlet predicted temperature and the temperature difference target value to obtain an inlet and outlet temperature difference feedforward control signal, and generating an inlet and outlet temperature difference feedback control signal according to the temperature difference target value and a preset temperature difference feedback control loop; adjusting the temperature of the target fuel cell according to the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal to control the temperature of the target fuel cell.

[0006] In one embodiment of the present invention, the future inlet temperature of the target fuel cell is predicted based on the actual outlet temperature to obtain the predicted inlet temperature, including: obtaining a first fuel cell parameter of a target thermal management system, wherein the target thermal management system is a thermal management system for controlling the temperature of the target fuel cell; determining a first temperature prediction correction amount of the target fuel cell in a temperature prediction process based on a preset first correction law; and calculating the first battery parameter and the first temperature prediction correction amount to obtain the predicted inlet temperature of the target fuel cell.

[0007] In one embodiment of the present invention, the inlet predicted temperature and the inlet target temperature are calculated to obtain an inlet temperature feedforward control signal, including: calculating the inlet target temperature and the inlet predicted temperature to obtain a predicted temperature error value; constructing a first mapping function relationship based on the predicted temperature error value and a first preset cost relationship, the first mapping function relationship being used to represent the inlet temperature control cost of the target fuel cell; and calculating the inlet temperature feedforward control signal of the target fuel cell according to the first mapping function relationship.

[0008] In one embodiment of the present invention, an inlet temperature feedback control signal is generated according to the actual inlet temperature and a preset temperature feedback control loop, including: calculating an actual temperature error value of the target fuel cell based on the inlet target temperature and the actual inlet temperature; and inputting the actual temperature error value into the preset temperature feedback control loop to obtain an inlet temperature feedback control signal of the target fuel cell.

[0009] In one embodiment of the present invention, the future outlet temperature of the target fuel cell is predicted based on the ambient temperature and the heat change of the fuel cell to obtain the predicted outlet temperature, including: obtaining a second fuel cell parameter of a target thermal management system, wherein the target thermal management system is a thermal management system for controlling the temperature of the target fuel cell; determining a second temperature prediction correction amount of the target fuel cell in the temperature prediction process based on a preset second correction law; and calculating the second battery parameter and the second temperature prediction correction amount to obtain the predicted outlet temperature of the target fuel cell.

[0010] In one embodiment of the present invention, the outlet predicted temperature, the inlet predicted temperature and the temperature difference target value are calculated to obtain an inlet and outlet temperature difference feedforward control signal, including: calculating the outlet predicted temperature and the inlet predicted temperature to obtain a temperature difference prediction value, and obtaining a temperature difference control error based on the temperature difference prediction value and the temperature difference target value; constructing a second mapping function relationship based on the temperature difference control error value and a preset second cost relationship, the second mapping function relationship being used to represent the temperature difference control cost of the target fuel cell; and calculating the inlet and outlet temperature difference feedforward control signal of the target fuel cell according to the second mapping function relationship.

[0011] In one embodiment of the present invention, an inlet and outlet temperature difference feedback control signal is generated according to the temperature difference target value and a preset temperature difference feedback control loop, including: calculating the actual inlet temperature and the actual outlet temperature to obtain the actual temperature difference value of the target fuel cell, and obtaining a temperature difference control error based on the actual temperature difference value and the temperature difference target value; inputting the temperature difference control error into the preset temperature difference feedback control loop to obtain the inlet and outlet temperature difference feedback control signal of the target fuel cell.

[0012] In one embodiment of the present invention, before adjusting the temperature of the target fuel cell according to the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal, it also includes: obtaining the attenuation parameter of the target fuel cell; calculating the attenuation parameter and the preset third correction law to obtain the temperature signal correction coefficient, the inlet temperature signal correction coefficient is used to correct the inlet temperature control signal, the inlet temperature control signal includes the inlet temperature feedforward control signal and the inlet temperature feedback control signal; calculating the attenuation parameter and the preset fourth correction law to obtain the inlet and outlet temperature difference signal correction coefficient, the inlet and outlet temperature difference signal correction coefficient is used to correct the inlet and outlet temperature difference control signal, the inlet and outlet temperature difference control signal includes the inlet and outlet temperature difference feedforward control signal and the inlet and outlet temperature difference feedback control signal.

[0013] In one embodiment of the present invention, the temperature of the fuel cell is adjusted according to the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal, including: obtaining the weight coefficient of the inlet temperature control signal and the weight coefficient of the inlet and outlet temperature difference control signal; calculating the inlet temperature feedforward control signal, the inlet temperature feedback control signal, and the weight coefficient of the inlet temperature control signal to obtain a target inlet temperature control signal; calculating the inlet and outlet temperature difference feedforward control signal, the inlet and outlet temperature difference feedback control signal, and the weight coefficient of the inlet and outlet temperature difference control signal to obtain a target inlet and outlet temperature difference control signal; adjusting the temperature of the target fuel cell based on the target inlet temperature control signal and the target inlet and outlet temperature difference control signal to control the temperature of the target fuel cell.

[0014] The present application provides a battery temperature control device, the device comprising: an information acquisition module, used to acquire a heat change value of a target fuel cell, and temperature parameters of the target fuel cell, the temperature parameters comprising an inlet target temperature, an inlet actual temperature, a temperature difference target value, an outlet actual temperature, and an ambient temperature; an inlet temperature control signal generation module, used to predict the future inlet temperature of the target fuel cell based on the outlet actual temperature to obtain an inlet predicted temperature, calculate the inlet predicted temperature and the inlet target temperature to obtain an inlet temperature feedforward control signal, and generate an inlet temperature feedback control signal according to the inlet actual temperature and a preset temperature feedback control loop; an inlet temperature control signal generation module, used to predict the future inlet temperature of the target fuel cell based on the outlet actual temperature to obtain an inlet predicted temperature, calculate the inlet predicted temperature and the inlet target temperature to obtain an inlet temperature feedforward control signal, and generate an inlet temperature feedback control signal according to the inlet actual temperature and a preset temperature feedback control loop; A temperature difference control signal generating module is used to predict the future outlet temperature of the target fuel cell based on the ambient temperature and the heat change value to obtain the outlet predicted temperature, calculate the outlet predicted temperature, the inlet predicted temperature and the temperature difference target value to obtain an inlet and outlet temperature difference feedforward control signal, and generate an inlet and outlet temperature difference feedback control signal according to the temperature difference target value and a preset temperature difference feedback control loop; a control module is used to adjust the temperature of the target fuel cell according to the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal to control the temperature of the target fuel cell.

[0015] The present application provides an electronic device, which includes: one or more processors; a storage device for storing one or more programs, and when the one or more programs are executed by the one or more processors, the electronic device implements the fuel cell temperature control method as described in any one of the above.

[0016] The present application provides a computer-readable storage medium, characterized in that a computer program is stored thereon, and when the computer program is executed by a processor of a computer, the computer is enabled to execute any of the fuel cell temperature control methods described above.

[0017] Beneficial effects of the present invention: The fuel cell temperature control method, device, equipment and storage medium proposed in the present application, the method generates a feedforward control signal and a feedback control signal respectively through the current temperature parameters and predicted temperature parameters of the battery coolant, and adjusts the temperature of the battery simultaneously based on the feedforward control signal and the feedback control signal, and in the process of generating the feedforward control signal and the feedback control signal, fully considers the influence of the fuel cell attenuation on the feedforward and feedback parameters, and the influence of the temperature control signal on the energy consumption and life of the thermal management system, and improves the adaptability of the parameters and the control accuracy of the temperature by optimizing the feedforward parameters and the control method, which not only reduces the energy consumption of the thermal management system, but also improves the service life of the thermal management system.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 is a schematic diagram of an implementation environment of a fuel cell temperature control method shown in an exemplary embodiment of the present application;

[0021] Figure 2 is a structural diagram of a fuel cell thermal management system shown in an exemplary embodiment of the present application;

[0022] Figure 3 is a flow chart of a fuel cell temperature control method shown in an exemplary embodiment of the present application;

[0023] Figure 4 is a fuel cell inlet coolant temperature control flow chart showing an exemplary embodiment of the present application;

[0024] Figure 5 is a flow chart of the control of the temperature difference of the coolant at the inlet and outlet of a fuel cell shown in an exemplary embodiment of the present application;

[0025] Figure 6is a block diagram of a fuel cell temperature control device shown in an exemplary embodiment of the present application;

[0026] Figure 7 A schematic diagram of the structure of a computer system suitable for implementing an electronic device of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0027] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0029] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0030] First of all, it should be noted that since the temperature of the fuel cell coolant has a time lag, controlling the inlet and outlet temperatures by controlling the actuator of the thermal management system based on the real-time temperature error will result in poor control accuracy, so feedforward and feedback joint control is usually used to improve the temperature control accuracy and response speed. As the fuel cell decays, at the same output power, more heat will be generated, and the action of the temperature control actuator will change. Therefore, in order to ensure the temperature control accuracy and response speed during long-term use, the feedforward and feedback control parameters need to be adjusted according to the degree of decay. And when the control accuracy is met, the control should be further optimized to reduce the energy consumption of the thermal management system and increase the life of the actuator.

[0031] PID (Proportional Integral Derivative) is one of the earliest developed control strategies, which uses proportional, integral and differential control. It is widely used in industrial process control due to its simple algorithm, good robustness and high reliability. Its working principle is to form a control deviation based on the given value and the actual output value, and to control the controlled object by linearly combining the deviation into a control quantity according to the proportion, integral and differential.

[0032] Figure 1 It is a schematic diagram of an implementation environment of a fuel cell temperature control method shown in an exemplary embodiment of the present application.

[0033] like Figure 1 As shown, the implementation environment of the fuel cell temperature control method includes a data acquisition device 101 and a computer device 102, wherein the data acquisition device is used to collect various temperature parameters in the fuel cell thermal management system, including but not limited to the inlet target temperature, the inlet actual temperature, the temperature difference target value, the outlet actual temperature, and the ambient temperature, etc. The type of the acquisition device can be a temperature sensor or any other device that can be used to collect gas or liquid temperature, and the present application does not impose any restrictions on this. The computer device 102 is configured with corresponding target temperature values, target temperature difference values, and related preset correction rules and algorithms, etc., which can be used to calculate the control signal of the target fuel cell based on the various temperature parameters collected by the data acquisition device 101 and the pre-configured target parameters and correction rules and algorithms, including the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal, so as to adjust the temperature of the target fuel cell. In addition, it should be noted that the computer device 102 can be at least one of a desktop graphics processing unit (GPU) computer, a GPU computing cluster, a neural network computer, etc., or an intelligent processor integrated in the current vehicle, and the present application does not impose any restrictions on this.

[0034] Figure 2 It is a structural diagram of a fuel cell thermal management system shown as an exemplary embodiment of the present application.

[0035] like Figure 2 As shown, the fuel cell includes a fuel cell stack and a load, wherein the anode of the fuel cell stack is connected to the hydrogen system, and the cathode of the fuel cell stack is connected to the air system, and the fuel cell thermal management system is composed of a water pump, an electronic four-way valve, a radiator group, an intercooler, and a temperature sensor, wherein the inlet is connected to the cathode of the fuel cell stack, and the outlet is connected to the anode of the fuel cell stack, and an inlet temperature sensor and an outlet temperature sensor are respectively arranged at the inlet and outlet.

[0036] Specifically, the operation of the water pump causes the coolant to flow from the inlet to the outlet of the fuel cell. The water pump has the function of adjusting the temperature difference between the inlet and outlet of the fuel cell coolant, which then flows into the fuel cell through the external thermal management system. The inlet and outlet of the fuel cell are respectively equipped with a coolant temperature sensor to collect the inlet and outlet coolant temperatures of the fuel cell. The function of the four-way valve is to control the flow of the coolant to the two branches of the large circulation and the small circulation. The radiator plays a cooling role. The four-way valve radiator has the function of adjusting the inlet temperature of the fuel cell. The function of the intercooler is to cool the air entering the fuel cell.

[0037] Figure 3 It is a flow chart of a fuel cell temperature control method shown in an exemplary embodiment of the present application.

[0038] like Figure 3 As shown, in an exemplary embodiment, the fuel cell temperature control method includes at least steps S310 to S340, which are described in detail as follows:

[0039] Step S310, obtaining the heat change value of the target fuel cell and the temperature parameters of the target fuel cell, wherein the temperature parameters include the inlet target temperature, the inlet actual temperature, the temperature difference target value, the outlet actual temperature, and the ambient temperature.

[0040] In one embodiment of the present application, the actual inlet temperature T is obtained based on the temperature sensor set in the fuel cell thermal management system. in_act , and the actual outlet temperature T out_act , and the ambient temperature T amb In addition, based on the battery temperature control requirements, the inlet target temperature T in_tar , and the temperature difference target value T diff_tar .

[0041] Step S320, predicting the future inlet temperature of the target fuel cell based on the actual outlet temperature to obtain the inlet predicted temperature, calculating the inlet predicted temperature and the inlet target temperature to obtain an inlet temperature feedforward control signal, and generating an inlet temperature feedback control signal according to the actual inlet temperature and a preset temperature feedback control loop.

[0042] Figure 4 1 is a flow chart of fuel cell inlet coolant temperature control according to an exemplary embodiment of the present application.

[0043] In one embodiment of the present application, a fuel cell is taken as a target fuel cell, and the fuel cell inlet coolant temperature is taken as an example. In the process of controlling the fuel cell inlet coolant temperature, the steps include:

[0044] S41, predicting the fuel cell inlet coolant temperature.

[0045] In one embodiment of the present application, the future inlet temperature of a target fuel cell is predicted based on the actual outlet temperature to obtain the predicted inlet temperature, including: obtaining a first fuel cell parameter of a target thermal management system, the target thermal management system is a thermal management system for controlling the temperature of the target fuel cell; determining a first temperature prediction correction amount of the target fuel cell in a temperature prediction process based on a preset first correction law; and calculating the first fuel cell parameter and the first temperature prediction correction amount to obtain the predicted inlet temperature of the target fuel cell.

[0046] In a specific embodiment of the present application, considering the time lag of temperature change caused by the actuator action, according to the current actual outlet temperature T out_act and a first fuel cell parameter of the target thermal management system, wherein the first fuel cell parameter of the target thermal management system includes a radiator heat dissipation Q rad , Radiator air volume W rad , the coolant flow rate q passing through the radiator (i.e. large cycle) bcyc , Coolant flow rate q through the small cycle scyc When estimating the fuel cell inlet coolant temperature, the correction amount Δin obtained according to the correction law, that is, the preset first correction law, can predict the temperature after a period of time. The formula is as follows:

[0047]

[0048] Among them, T in_cal represents the fuel cell inlet coolant temperature, i.e. the inlet predicted temperature; T out_act Indicates the actual outlet temperature; Q rad Indicates the heat dissipation of the radiator; W rad Indicates the radiator air volume; q bcyc Indicates the coolant flow through the large circulation, q scyc Indicates the coolant flow rate passing through the small cycle; Δin indicates the correction amount.

[0049] S42, according to the predicted temperature, an optimization algorithm is used to determine the four-way valve and radiator feedforward control signals.

[0050] In one embodiment of the present application, the inlet predicted temperature and the inlet target temperature are calculated to obtain an inlet temperature feedforward control signal, including: calculating the inlet target temperature and the inlet predicted temperature to obtain a predicted temperature error value; constructing a first mapping function relationship based on the predicted temperature error value and a first preset cost relationship, the first mapping function relationship being used to represent the inlet temperature control cost of the target fuel cell; and calculating the inlet temperature feedforward control signal of the target fuel cell according to the first mapping function relationship.

[0051] In a specific embodiment of the present application, the temperature regulating device in the fuel cell thermal management system is a four-way valve and a radiator, that is, the inlet temperature feedforward control signal is a four-way valve feedforward control signal and a radiator feedforward control signal. The optimization algorithm is used to determine the four-way valve and radiator feedforward control signals, and the four-way valve feedforward control signal is the feedforward opening request θ ref , the radiator feedforward control signal is the feedforward fan speed request N fanref , where the larger the four-way valve opening, the larger the flow through the large cycle, but the higher the four-way valve energy consumption, the larger the flow through the radiator at the same fan speed and wind speed, the greater the heat dissipation, and the higher the speed of the radiator at the same flow and wind speed, the greater the heat dissipation, the higher the energy consumption, and if the four-way valve opening request and fan speed change continuously and drastically, it will affect the life of both. Based on this, the temperature control error is obtained, and the formula is as follows:

[0052] ΔT in_ref =T in_tar -T in_cal Formula (2):

[0053] Where, ΔT in_ref Represents the temperature control error, T in_tar represents the inlet target temperature, T in_cal Represents the predicted inlet temperature.

[0054] Then, under the premise of satisfying the control accuracy, the cost function of the inlet temperature control is established, that is, the first mapping function relationship, and the formula of the cost function is as follows:

[0055] f in =α in (E valve +E fan +H valve +H fan )+(1-α in )f T_in Formula (3),

[0056] Among them, f in represents the cost function in the process of controlling battery temperature, and E valve Energy consumption of four-way valve, E fan Indicates the energy consumption of the radiator, H valve Indicates the life decay of the four-way valve, H fan Indicates the life decay of the radiator, f T_in Indicates the control accuracy of coolant inlet temperature, α in Represents the weight coefficient, ranging from 0 to 1.

[0057] It should be noted that the battery temperature control method proposed in this application can obtain the feedforward control signal four-way valve opening θ with high control accuracy, low energy consumption and beneficial to the life of the four-way valve and the radiator by applying the optimization algorithm. ref and radiator speed N fanref ;

[0058] S43, determining the four-way valve and radiator feedback control signals according to the actual inlet temperature difference.

[0059] In one embodiment of the present application, an inlet temperature feedback control signal is generated according to the actual inlet temperature and a preset temperature feedback control loop, including: calculating the actual temperature error value of the target fuel cell based on the inlet target temperature and the actual inlet temperature; inputting the inlet temperature difference into the preset temperature feedback control loop to obtain the inlet temperature feedback control signal of the target fuel cell.

[0060] In a specific embodiment of the present application, the temperature regulating device in the fuel cell thermal management system is a four-way valve and a radiator, that is, the inlet temperature feedforward control signal is a four-way valve feedforward control signal and a radiator feedforward control signal. The feedback control signal of the four-way valve and the radiator is based on the target temperature value of the inlet and the actual temperature value of the inlet to determine the actual temperature error value, and the four-way valve feedback control signal θ is obtained according to the actual temperature error value and the preset feedback control loop. feedback and radiator feedback control signal N fanfeedback , where the formula for determining the actual temperature error value is as follows:

[0061] ΔT in =T in_tar -T in_act Formula (4),

[0062] Where, ΔT in Indicates the actual temperature error value, T in_tar represents the inlet target temperature, T in_act Indicates the actual inlet temperature.

[0063] In addition, it should be noted that the above-mentioned feedback control loop is a control signal generation loop constructed based on a feedback control method, and its feedback control method includes but is not limited to PID and the like.

[0064] S44, determining the correction coefficient of attenuation on the four-way valve and radiator control signal.

[0065] In a specific embodiment of the present application, the inlet temperature regulating device in the fuel cell thermal management system is a four-way valve and a radiator, that is, the inlet temperature feedforward control signal is a four-way valve feedforward control signal and a radiator feedforward control signal. To determine the correction coefficient of the attenuation to the four-way valve and radiator control signals, it is necessary to obtain the attenuation degree FC of the fuel cell.loss Then, by processing the experimental data, the correction law is extracted, which is the preset third correction law, so as to obtain the correction coefficient ρ of the four-way valve control signal valve , and the correction factor ρ of the radiator control signal fan , the formula is as follows:

[0066] ρ valve =f valve (FC loss ) Formula (5),

[0067] ρ fan =f fan (F Closs ) Formula (6),

[0068] Among them, ρ valve Indicates the correction factor of the four-way valve control signal, f valve Indicates the preset four-way valve signal correction rule, ρ fan Indicates the correction factor of the radiator control signal, f fan Indicates the predicted radiator signal correction law, FC loss Indicates the degree of attenuation of the fuel cell.

[0069] S45, determining the final four-way valve and radiator control signals according to the feedforward and feedback control signals and the correction coefficients.

[0070] In a specific embodiment of the present application, the inlet temperature regulating device in the fuel cell thermal management system is a four-way valve and a radiator, that is, the inlet temperature feedforward control signal is a four-way valve feedforward control signal and a radiator feedforward control signal. After respectively calculating the feedforward control signal and feedback control signal of the four-way valve, and the feedforward control signal and feedback control signal of the radiator based on the above method, it is also necessary to correct the above-mentioned four-way valve feedforward control signal, four-way valve feedback control signal, radiator feedforward control signal, and radiator feedback control signal based on the weight coefficients of the feedforward control signal and the feedback control signal to obtain the four-way valve target control signal and the radiator target control signal, and the formula is as follows:

[0071] θ req =(β valve θ ref +(1-β valve )θ feedback )ρ valve Formula (7),

[0072] N fanreq =(β fan N fanref +(1-β fan )N fanfeedback )ρ fan Formula (8),

[0073] Among them, θ req represents the target control signal of the four-way valve, β valve Represents the weight coefficient of the four-way valve control signal, θ ref represents the four-way valve feedforward control signal, θ feedback represents the four-way valve feedback control signal, ρ valve Indicates the correction coefficient of the four-way valve control signal, N fanreq represents the radiator target control signal, β fan Represents the weight coefficient of the radiator control signal, N fanref Represents the radiator feedforward control signal, N fanfeedback represents the radiator feedback control signal, ρ fan Indicates the correction factor of the radiator control signal.

[0074] S46, the four-way valve and radiator respond to the control signal to accurately control the inlet coolant temperature.

[0075] In a specific embodiment of the present application, the inlet temperature regulating device in the fuel cell thermal management system is a four-way valve and a radiator, that is, the inlet temperature feedforward control signal is a four-way valve feedforward control signal and a radiator feedforward control signal. After the four-way valve target control signal and the radiator target control signal are calculated based on the above method, the target control signal is sent to the four-way valve and the radiator respectively to adjust the opening of the four-way valve and the rotation speed of the radiator, thereby realizing the control of the fuel cell temperature.

[0076] Step S330, predicting the future outlet temperature of the target fuel cell based on the ambient temperature and the heat change value to obtain the outlet predicted temperature, calculating the outlet predicted temperature, inlet predicted temperature and the temperature difference target value, obtaining the inlet and outlet temperature difference feedforward control signal, and generating the inlet and outlet temperature difference feedback control signal according to the temperature difference target value and the preset temperature difference feedback control loop.

[0077] Figure 5 It is a flow chart of the fuel cell inlet and outlet coolant temperature difference control according to an exemplary embodiment of the present application.

[0078] In one embodiment of the present application, a fuel cell is taken as a target fuel cell, and the fuel cell inlet coolant temperature is taken as the fuel cell inlet temperature, the fuel cell outlet coolant temperature is taken as the fuel cell outlet temperature, and the temperature difference between the outlet coolant temperature and the inlet coolant temperature is taken as the battery inlet and outlet temperature difference. In the process of controlling the inlet and outlet coolant temperature difference of the fuel cell, as follows Figure 5 As shown, the steps include:

[0079] S51, predicting the coolant temperature at the fuel cell outlet.

[0080] In one embodiment of the present application, the future outlet temperature of the target fuel cell is predicted based on the ambient temperature and the heat change value to obtain the predicted outlet temperature, including: obtaining a second fuel cell parameter of the target thermal management system, the target thermal management system is a thermal management system for controlling the temperature of the target fuel cell; determining a second temperature prediction correction amount of the target fuel cell in the temperature prediction process based on a preset second correction law; calculating the second fuel cell parameter and the second temperature prediction correction amount to obtain the predicted outlet temperature of the target fuel cell.

[0081] In a specific embodiment of the present application, considering the time lag of temperature change caused by the actuator action, the second fuel cell parameters of the target thermal management system are determined according to the initial time t0 and the end time t1 of the current fuel cell operation, and the second fuel cell parameters include the total energy Q of the hydrogen reaction. tot , the heat Q brought out by the reaction gas gas , the power output of the fuel cell P, the heat taken away by the coolant Q cool , the heat radiated outward by the fuel cell is Q amb , the mass M of the fuel cell, the specific heat capacity C of the fuel cell, the correction value Δout obtained according to the correction law when estimating the coolant temperature at the fuel cell outlet, and the ambient temperature parameter T amb Get the predicted outlet coolant temperature T out_cal , the formula for predicting the outlet coolant temperature, i.e. the outlet predicted temperature, is as follows:

[0082]

[0083] Among them, T out_cal represents the predicted outlet temperature, Q tot represents the total energy of hydrogen reaction, Q gas represents the heat brought out by the reaction gas, P represents the power output of the fuel cell, Q cool Indicates the heat removed by the coolant, Q amb represents the heat radiated outward by the fuel cell, M represents the mass of the fuel cell, C represents the specific heat capacity of the fuel cell, Δout represents the correction value obtained according to the correction law, i.e., the preset second correction law, when the coolant temperature at the outlet of the fuel cell is amb Indicates the ambient temperature.

[0084] S52, determining a water pump feedforward control signal according to the predicted temperature.

[0085] In one embodiment of the present application, the outlet predicted temperature, the inlet predicted temperature and the temperature difference target value are calculated to obtain the inlet and outlet temperature difference feedforward control signal, including: calculating the outlet predicted temperature and the inlet predicted temperature to obtain the temperature difference prediction value, and obtaining the temperature difference control error based on the temperature difference prediction value and the temperature difference target value; constructing a second mapping function relationship based on the temperature difference control error value and a preset second cost relationship, the second mapping function relationship being used to represent the temperature difference control cost of the target fuel cell; and calculating the inlet and outlet temperature difference feedforward control signal of the target fuel cell according to the second mapping function relationship.

[0086] In a specific embodiment of the present application, the inlet and outlet temperature difference regulating device in the fuel cell thermal management system is taken as a water pump. According to the predicted temperature, the water pump feedforward control signal is determined, and the water pump feedforward control signal is the speed request N pumpref , under the premise of satisfying the control accuracy, the temperature difference control error is obtained based on the temperature difference prediction value and the temperature difference target value obtained above, and its calculation formula is as follows:

[0087] ΔT out_ref =(T out_cal -T in_cal )-T diff_tar Formula (10),

[0088] Where, ΔT out_ref Represents the temperature difference control error, T out_cal represents the predicted outlet temperature, T in_cal represents the predicted inlet temperature, T diff_tar Indicates the temperature difference target value.

[0089] Then, a cost function is constructed based on the temperature difference control error obtained above and the preset cost relationship to represent the loss of the water pump in the process of adjusting the battery temperature, and the optimization algorithm is applied to calculate the control precision high feedforward control signal N pumpref , its cost function is expressed as follows:

[0090] f out =f T_out Formula (11),

[0091] Among them, f out represents the cost function, i.e., the second mapping function relationship; f T_out Indicates the control accuracy of the coolant inlet and outlet temperature difference.

[0092] S53, determining a water pump feedback control signal according to the actual temperature.

[0093] In one embodiment of the present application, an inlet and outlet temperature difference feedback control signal is generated according to a temperature difference target value and a preset temperature difference feedback control loop, including: calculating the actual inlet temperature and the actual outlet temperature to obtain the actual temperature difference value of the target fuel cell, and obtaining a temperature difference control error based on the actual temperature difference value and the temperature difference target value; inputting the temperature difference control error into a preset temperature difference feedback control loop to obtain the inlet and outlet temperature difference feedback control signal of the target fuel cell.

[0094] In a specific embodiment of the present application, the inlet and outlet temperature difference regulating device in the fuel cell thermal management system is taken as a water pump as an example. Based on the actual inlet temperature and actual outlet temperature obtained above, the actual inlet and outlet temperature difference can be calculated, and the calculation formula is as follows:

[0095] T diff_act =T ou_act -T in_act Formula (12),

[0096] Among them, T diff_act Indicates the actual temperature difference between the inlet and outlet, that is, the actual value of the temperature difference; T out_act Indicates the actual outlet temperature, T in_act Indicates the actual inlet temperature.

[0097] Then, based on the actual temperature difference value and the target temperature difference value obtained above, the temperature difference control error can be calculated, and the calculation formula is as follows:

[0098] ΔT diff_ref =T diff_tar -T diff_act Formula (13),

[0099] Where, ΔT diff_ref Indicates the temperature difference control error value, T diff_tar Indicates the temperature difference target value, T diff_act Indicates the actual value of temperature difference.

[0100] Finally, the temperature difference control error value obtained above is input into the feedback control loop of the water pump, that is, the preset temperature difference feedback control loop, to obtain the water pump feedback control signal N pumpfeedback It should be noted that the above-mentioned feedback control loop is a control signal generation loop constructed based on a feedback control method, and its feedback control method includes but is not limited to PID, etc., and this application does not impose any restrictions on it.

[0101] S54, determining a correction coefficient of attenuation on the water pump control signal.

[0102] In one embodiment of the present application, the inlet and outlet temperature difference regulating device in the fuel cell thermal management system is taken as a water pump as an example. In order to determine the correction coefficient of the attenuation on the water pump control signal, it is first necessary to obtain the attenuation degree FC of the fuel cell. lossBy processing the experimental data, the correction law is extracted, which is the preset fourth correction law, that is, the correction law of the water pump control signal, and the correction coefficient ρ of the water pump control signal is obtained. pump , the formula is as follows:

[0103] ρ pump =f pump (FC loss ) Formula (14),

[0104] Among them, ρ pump Indicates the correction factor of the pump control signal, FC loss Indicates the degree of attenuation of the fuel cell.

[0105] S55, determining a final water pump control signal according to the feedforward and feedback control signals and the correction coefficient.

[0106] In one embodiment of the present application, the inlet and outlet temperature difference regulating device in the fuel cell thermal management system is taken as a water pump as an example. The temperature difference control signal obtained based on the above method is the water pump control signal, which includes the inlet and outlet temperature difference feedforward control signal, i.e., the water pump feedforward control signal and the inlet and outlet temperature difference feedback control signal, i.e., the water pump feedback control signal. The target water pump control signal is obtained based on the above water pump feedforward control signal and the water pump feedback control signal, and it is necessary to further process the water pump control signal based on the weight coefficient of the water pump control signal, and the specific formula is as follows:

[0107] N pumpreq =(β pump N pumpref +(1-β pump )N pumpfeedback )ρ pump Formula (15),

[0108] Among them, N pumpreq represents the target water pump control signal, β pump Represents the weight coefficient of the water pump control signal, N pumpref Represents the water pump feedforward control signal, N pumpfeedback represents the water pump feedback control signal, ρ pump Indicates the water pump signal correction factor.

[0109] S56, the water pump responds to the control signal to accurately control the temperature difference between the inlet and outlet coolant.

[0110] In one embodiment of the present application, the inlet and outlet temperature difference regulating device in the fuel cell thermal management system is taken as a water pump as an example. After the water pump target control signal is calculated based on the above method, the water pump target control signal is sent to the water pump control center to adjust the speed of the water pump, thereby achieving control of the battery outlet temperature, and further achieving control of the battery inlet and outlet temperature difference.

[0111] Step S340, adjusting the temperature of the fuel cell according to the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal to control the temperature of the target fuel cell.

[0112] In one embodiment of the present application, before adjusting the temperature of the fuel cell according to the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal, it also includes: obtaining the attenuation parameter of the target fuel cell; calculating the attenuation parameter and the preset third correction law to obtain the inlet temperature signal correction coefficient, the temperature signal correction coefficient is used to correct the inlet temperature control signal, the inlet temperature control signal includes the inlet temperature feedforward control signal and the inlet temperature feedback control signal; calculating the attenuation parameter and the preset fourth correction law to obtain the inlet and outlet temperature difference signal correction coefficient, the inlet and outlet temperature difference signal correction coefficient is used to correct the inlet and outlet temperature difference control signal, the inlet and outlet temperature difference control signal includes the inlet and outlet temperature difference feedforward control signal and the inlet and outlet temperature difference feedback control signal.

[0113] In a specific embodiment of the present application, the inlet temperature regulating device in the fuel cell thermal management system is a four-way valve and a radiator, and the inlet and outlet temperature difference regulating device is a water pump. Therefore, the inlet temperature regulating signal of the fuel cell thermal management system is an inlet temperature feedforward control signal and an inlet temperature feedback control signal, and the inlet temperature feedforward control signal includes a four-way valve feedforward control signal and a radiator feedforward control signal, and the inlet temperature feedback control signal includes a four-way valve feedback control signal and a radiator feedback control signal. In addition, its inlet and outlet temperature difference control signals, i.e., the inlet and outlet temperature difference feedforward control signal and the inlet and outlet temperature difference feedback control signal, are respectively the water pump feedforward control signal and the water pump feedback control signal. It should be noted that after obtaining the above control signal, it is also necessary to correct it. Therefore, it is first necessary to correct it based on the attenuation degree of the fuel cell FC. loss The attenuation coefficients of various control signals are obtained. Among them, the correction coefficient of the four-way valve control signal is shown in formula (5), the correction coefficient of the radiator control signal is shown in formula (6), and the correction coefficient of the water pump control signal is shown in formula (14).

[0114] In addition, in one embodiment of the present application, the temperature of the fuel cell is regulated according to the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal, including: obtaining the weight coefficient of the temperature control signal and the weight coefficient of the temperature difference control signal; calculating the inlet temperature feedforward control signal, the inlet temperature feedback control signal, and the weight coefficient of the inlet temperature control signal to obtain the target inlet temperature control signal; calculating the inlet and outlet temperature difference feedforward control signal, the inlet and outlet temperature difference feedback control signal, and the weight coefficient of the inlet and outlet temperature difference control signal to obtain the target inlet and outlet temperature difference control signal; adjusting the temperature of the target fuel cell based on the target inlet temperature control signal and the target inlet and outlet temperature difference control signal to control the temperature of the target fuel cell.

[0115] In a specific embodiment of the present application, the inlet temperature regulating device in the fuel cell thermal management system is a four-way valve and a radiator, and the inlet and outlet temperature difference regulating device is a water pump. After obtaining the four-way valve feedforward control signal, the radiator feedforward control signal, the four-way valve feedback control signal, the radiator feedback control signal, the water pump feedforward control signal, and the water pump feedback control signal based on the above method, based on the attenuation degree FC loss The signal correction coefficients corresponding to each item are optimized to obtain the target control signal, which includes the four-way valve target control signal, the radiator target control signal, and the water pump target control signal. Among them, the four-way valve target control signal is shown in formula (7), the radiator target control signal is shown in formula (8), and the water pump target control signal is shown in formula (15). After the four-way valve target control signal, the radiator target control signal, and the water pump target control signal are calculated, they are sent to the four-way valve control center, the radiator control center, and the water pump control center respectively to adjust the opening of the four-way valve, the speed of the radiator, and the speed of the water pump, so that the temperature and temperature difference of the target fuel cell meet the target temperature and target temperature difference respectively, so as to realize the control of the target fuel cell temperature.

[0116] It should be noted that the fuel cell temperature control method proposed in the present application controls the temperature of the fuel cell within a certain range by setting the inlet temperature target value and the inlet and outlet temperature difference target value, thereby effectively avoiding the shortening of its life due to unreasonable working temperature; and reasonably applies the feedforward and feedback joint control, comprehensively considering the influence of the fuel cell attenuation on the feedforward and feedback parameters, and during the use of the fuel cell, quickly adjusts the request parameters of the actuator according to the attenuation degree, thereby improving the adaptability of the parameters and the control accuracy of the temperature; in addition, by optimizing the control method, while ensuring the control accuracy, a cost function is established, and the optimization algorithm is applied to calculate the feedforward value, thereby reducing the energy consumption of the four-way valve and radiator of the thermal management system and improving the service life of the four-way valve and radiator.

[0117] Figure 6 is a block diagram of a fuel cell temperature control device shown in an exemplary embodiment of the present application. The device can be applied to Figure 1 The device may also be applicable to other exemplary implementation environments and specifically configured in other devices, and this embodiment does not limit the implementation environment to which the device is applicable.

[0118] like Figure 6 As shown, the exemplary fuel cell temperature control device includes: an information acquisition module 610 , a temperature control signal generation module 620 , a temperature difference control signal generation module 630 , and a control module 640 .

[0119] The information acquisition module 610 is used to obtain the heat change value of the target fuel cell and the temperature parameters of the target fuel cell, the temperature parameters including the inlet target temperature, the inlet actual temperature, the temperature difference target value, the outlet actual temperature, and the ambient temperature; the inlet temperature control signal generation module 620 is used to predict the future inlet temperature of the target fuel cell based on the outlet actual temperature to obtain the inlet predicted temperature, calculate the inlet predicted temperature and the inlet target temperature to obtain the inlet temperature feedforward control signal, and generate the inlet temperature feedback control signal according to the inlet actual temperature and the preset temperature feedback control loop; the inlet and outlet temperature difference control signal The signal generation module 630 is used to predict the future outlet temperature of the target fuel cell based on the ambient temperature and the heat change value to obtain the outlet predicted temperature, calculate the outlet predicted temperature, the inlet predicted temperature and the temperature difference target value, obtain the inlet and outlet temperature difference feedforward control signal, and generate the inlet and outlet temperature difference feedback control signal according to the temperature difference target value and the preset temperature difference feedback control loop; the control module 640 is used to adjust the temperature of the target fuel cell according to the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal to control the temperature of the target fuel cell.

[0120] It should be noted that the fuel cell temperature control device provided in the above embodiment and the fuel cell temperature control method provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment, and will not be repeated here. In practical applications, the fuel cell temperature control device provided in the above embodiment can allocate the above functions to different functional modules as needed, that is, divide the internal structure of the device into different functional modules to complete all or part of the functions described above, and this is not limited here.

[0121] An embodiment of the present application also provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the electronic device implements the fuel cell temperature control method provided in the above-mentioned embodiments.

[0122] Figure 7 The structure diagram of the computer system suitable for implementing the electronic device of the embodiment of the present application is shown. It should be noted that: Figure 7 The computer system 700 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0123] like Figure 7 As shown, the computer system 700 includes a central processing unit (CPU) 701, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 702 or the program loaded from the storage part 708 to the random access memory (RAM) 703, such as executing the method described in the above embodiment. In the RAM 703, various programs and data required for system operation are also stored. The CPU 701, ROM 702 and RAM 703 are connected to each other through a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.

[0124] The following components are connected to the I / O interface 705: an input section 706 including a keyboard, a mouse, etc.; an output section 707 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 708 including a hard disk, etc.; and a communication section 709 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 709 performs communication processing via a network such as the Internet. A drive 710 is also connected to the I / O interface 705 as needed. A removable medium 711, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 710 as needed so that a computer program read therefrom is installed into the storage section 708 as needed.

[0125] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 709, and / or installed from a removable medium 711. When the computer program is executed by a central processing unit (CPU) 701, various functions defined in the system of the present application are executed.

[0126] It should be noted that the computer-readable medium shown in the embodiment of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, wherein a computer-readable computer program is carried. This propagated data signal can take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. A computer program contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0127] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0128] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0129] Another aspect of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor of a computer, the computer executes the fuel cell temperature control method as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist independently without being assembled into the electronic device.

[0130] Another aspect of the present application also provides a computer program product or a computer program, which includes a computer instruction stored in a computer-readable storage medium. A processor of a computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the fuel cell temperature control method provided in each of the above embodiments.

[0131] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A fuel cell temperature control method, characterized in that: The method comprises: Acquire a heat change value of a target fuel cell and temperature parameters of the target fuel cell, wherein the temperature parameters include an inlet target temperature, an inlet actual temperature, a temperature difference target value, an outlet actual temperature, and an ambient temperature; Predicting the future inlet temperature of the target fuel cell based on the actual outlet temperature to obtain the predicted inlet temperature, including: acquiring a first fuel cell parameter of a target thermal management system, the target thermal management system is a thermal management system for controlling the temperature of the target fuel cell; determining a first temperature prediction correction amount of the target fuel cell in the inlet temperature prediction process based on a preset first correction rule; calculating the first fuel cell parameter and the first temperature prediction correction amount to obtain the predicted inlet temperature of the target fuel cell, the first fuel cell parameter including radiator heat dissipation, radiator air volume, coolant flow through a large cycle, and coolant flow through a small cycle; Calculating the inlet predicted temperature and the inlet target temperature to obtain an inlet temperature feedforward control signal includes: calculating the inlet target temperature and the inlet predicted temperature to obtain a predicted temperature error value; constructing a first mapping function relationship based on the predicted temperature error value and a first preset cost relationship, the first mapping function relationship being used to represent the inlet temperature control cost of the target fuel cell; and calculating the inlet temperature feedforward control signal of the target fuel cell according to the first mapping function relationship; Generating an inlet temperature feedback control signal according to the inlet actual temperature and a preset temperature feedback control loop, including: calculating an actual temperature error value of the target fuel cell based on the inlet target temperature and the inlet actual temperature; inputting the actual temperature error value into the preset temperature feedback control loop to obtain an inlet temperature feedback control signal of the target fuel cell; Predicting the future outlet temperature of the target fuel cell based on the ambient temperature and the heat change value to obtain the outlet predicted temperature, including: acquiring a second fuel cell parameter of a target thermal management system, the target thermal management system being a thermal management system for controlling the temperature of the target fuel cell; determining a second temperature prediction correction amount of the target fuel cell in the outlet temperature prediction process based on a preset second correction rule; calculating the second fuel cell parameter and the second temperature prediction correction amount to obtain the outlet predicted temperature of the target fuel cell; Calculating the outlet predicted temperature, the inlet predicted temperature and the temperature difference target value to obtain an inlet and outlet temperature difference feedforward control signal, including: calculating the outlet predicted temperature and the inlet predicted temperature to obtain a temperature difference predicted value, and obtaining a temperature difference control error based on the temperature difference predicted value and the temperature difference target value; constructing a second mapping function relationship based on the temperature difference control error value and a preset second cost relationship, the second mapping function relationship being used to represent the temperature difference control cost of the target fuel cell; and calculating the inlet and outlet temperature difference feedforward control signal of the target fuel cell according to the second mapping function relationship; Generating an inlet and outlet temperature difference feedback control signal according to the temperature difference target value and a preset temperature difference feedback control loop, including: calculating the inlet actual temperature and the outlet actual temperature to obtain the temperature difference actual value of the target fuel cell, and obtaining a temperature difference control error based on the temperature difference actual value and the temperature difference target value; inputting the temperature difference control error into the preset temperature difference feedback control loop to obtain the inlet and outlet temperature difference feedback control signal of the target fuel cell; Acquire the attenuation parameter of the target fuel cell; calculate the attenuation parameter and the preset third correction law to obtain an inlet temperature control signal correction coefficient, the inlet temperature control signal correction coefficient is used to correct the inlet temperature control signal, the inlet temperature control signal includes an inlet temperature feedforward control signal and an inlet temperature feedback control signal; calculate the attenuation parameter and the preset fourth correction law to obtain an inlet and outlet temperature difference control signal correction coefficient, the inlet and outlet temperature difference control signal correction coefficient is used to correct the inlet and outlet temperature difference control signal, the inlet and outlet temperature difference control signal includes an inlet and outlet temperature difference feedforward control signal and an inlet and outlet temperature difference feedback control signal; The temperature of the target fuel cell is adjusted according to the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal to control the temperature of the target fuel cell.

2. The fuel cell temperature control method according to claim 1, characterized in that: The temperature of the fuel cell is adjusted according to the inlet temperature feedforward control signal, the inlet temperature feedback control signal, the inlet and outlet temperature difference feedforward control signal, and the inlet and outlet temperature difference feedback control signal, including: Obtaining a weight coefficient of an inlet temperature control signal and a weight coefficient of an inlet and outlet temperature difference control signal; Calculating the inlet temperature feedforward control signal, the inlet temperature feedback control signal, and the weight coefficient of the inlet temperature control signal to obtain an inlet target temperature control signal; Calculating the inlet and outlet temperature difference feedforward control signal, the inlet and outlet temperature difference feedback control signal, and the weight coefficient of the inlet and outlet temperature difference control signal to obtain an inlet and outlet target temperature difference control signal; The temperature of the target fuel cell is adjusted based on the inlet target temperature control signal and the inlet / outlet target temperature difference control signal to control the temperature of the target fuel cell.

3. A fuel cell temperature control device, characterized in that: The device is used to implement the fuel cell temperature control method according to any one of claims 1-2.

4. An electronic device, characterized in that: The electronic device comprises: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, enables the electronic device to implement the fuel cell temperature control method as described in any one of claims 1 to 2.

5. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor of a computer, the computer is caused to execute the fuel cell temperature control method according to any one of claims 1 to 2.

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