Fuel cell system test bench cooling method and device, electronic equipment and medium

Abstract

The invention provides a fuel cell system test bench cooling method and device, electronic equipment and a medium, and is applied to the field of fuel cell system test benches, and the method comprises the steps: calculating the heat dissipation power of a fuel cell system according to the obtained real-time rotation speed and heat calculation parameters of a fan of the fuel cell system; and calculating a target cooling water mass flow rate of the fuel cell system test bench according to the heat dissipation power, and adjusting the current cooling water flow rate to the target cooling water mass flow rate so as to dissipate heat of the fuel cell system. The method can solve the problems that the test bench cannot adjust according to the actual heat dissipation demand of the system when performing water-cooling heat dissipation on the fuel cell system, and the test results of the same cell system are inconsistent due to the fact that the heat dissipation amounts are inconsistent when the two heat dissipation modes of bench water cooling and fan heat dissipation are used. Under the condition that extra output signals of the battery system are not increased, the test bench utilizes the rotating speed signals of the fan of the system, and the water-cooling heat dissipation amount of the bench and the heat dissipation amount of the fan can be consistent.

Description

Technical Field

[0001] The present application relates to the field of fuel cell system test benches, and more specifically, to a fuel cell system test bench cooling method, device, electronic equipment and medium in the field of fuel cell system test benches. Background Art

[0002] With the continuous breakthroughs in fuel cell technology, the application of fuel cells in the automotive industry has gradually been industrialized, and fuel cell engines have replaced traditional fuel engines in vehicle technology. In order to ensure the reliability and safety of fuel cell engines, their fuel cell systems must undergo performance and quality tests before leaving the factory. Test benches are crucial in the development stage of fuel cell systems. In the absence of fan cooling conditions in the laboratory, water-cooled heat sinks on the test bench can be used to dissipate excess heat and manage the heat dissipation of the fuel cell system.

[0003] In the related art, the widely used fuel cell system test bench has two cooling modes, namely air cooling (fan) cooling and water cooling. Among them, when using the test bench water cooling, the control strategy is to ensure that the cooling water outlet temperature is at a fixed value.

[0004] However, the above-mentioned water cooling method cannot adjust the heat dissipation according to the actual heat dissipation requirements of the system, and the use of water cooling and fan cooling will result in inconsistent heat dissipation, resulting in inconsistent performance results of the same battery system test, which needs to be solved urgently. Summary of the invention

[0005] The present application provides a fuel cell system test bench cooling method, device, electronic equipment and medium. The method can solve the problems that the test bench cannot adjust the water cooling of the fuel cell system according to the actual heat dissipation requirements of the system, and that the two heat dissipation methods of bench water cooling and fan cooling are inconsistent, resulting in inconsistent performance results of testing the same battery system. Without adding additional output signals to the battery system, the test bench uses the system fan speed signal to achieve consistency in the heat dissipation of the bench water cooling and the fan cooling.

[0006] In a first aspect, a fuel cell system test bench cooling method is provided, the method comprising the following steps:

[0007] Obtain the real-time speed and heat calculation parameters of the fan of the fuel cell system;

[0008] Calculating the heat dissipation power of the fuel cell system according to the real-time rotation speed of the fan and the heat calculation parameter; and

[0009] The target cooling water mass flow rate of the fuel cell system test bench is calculated according to the heat dissipation power of the fuel cell system, and the current cooling water flow rate is adjusted to the target cooling water mass flow rate to dissipate heat for the fuel cell system.

[0010] Through the above technical solution, the target cooling water mass flow rate of the fuel cell system test bench can be calculated based on the heat dissipation power of the fuel cell system calculated online in real time, so as to achieve the purpose of dynamically adjusting the water cooling of the fuel cell system.

[0011] In combination with the first aspect, in some possible implementations, obtaining the real-time rotation speed and heat calculation parameters of the fan of the fuel cell system includes:

[0012] Obtaining a cooling air flow rate and a cooling air inlet flow rate of the fuel cell system;

[0013] The heat calculation parameter is obtained according to a ratio of the cooling air flow rate to the cooling air inlet flow rate.

[0014] In combination with the first aspect, in some possible implementations, obtaining the cooling air flow rate and cooling air inlet flow rate of the fuel cell system includes:

[0015] Obtain coolant mass flow rate, coolant specific heat capacity, coolant inlet temperature, coolant outlet temperature, cooling air inlet temperature, cooling air outlet temperature, air constant pressure specific heat, air density, blade tip speed ratio and fan blade maximum radius;

[0016] Calculate the cooling air flow rate according to the coolant mass flow rate, the coolant specific heat capacity, the coolant inlet temperature, the coolant outlet temperature, the air constant pressure specific heat, the cooling air inlet temperature, the cooling air outlet temperature and the air density;

[0017] The cooling air inlet flow rate is calculated based on the real-time rotation speed of the fan, the maximum radius of the fan blades and the tip speed ratio.

[0018] In combination with the first aspect and the above implementation manner, in some possible implementation manners, calculating the cooling air flow rate according to the coolant mass flow rate, the coolant specific heat capacity, the coolant inlet temperature, the coolant outlet temperature, the air constant pressure specific heat, the cooling air inlet temperature, the cooling air outlet temperature and the air density includes:

[0019] Calculating a first difference between the coolant inlet temperature and the coolant outlet temperature, and calculating a first product of the first difference, the coolant mass flow rate, and the coolant specific heat capacity;

[0020] Calculating a second difference between the cooling air inlet temperature and the cooling air outlet temperature, and calculating a second product of the second difference, the air constant pressure specific heat, and the air density;

[0021] The cooling air flow rate is obtained according to a ratio of the first product to the second product.

[0022] In combination with the first aspect and the above implementation manner, in some possible implementation manners, calculating the cooling air inlet flow rate according to the real-time rotation speed of the fan, the maximum radius of the fan blade and the tip speed ratio includes:

[0023] Calculating the fan blade angular velocity according to the real-time rotation speed of the fan;

[0024] A third product of the fan blade angular velocity and the maximum radius of the fan blade is calculated, and the cooling air inlet flow rate is obtained according to a ratio of the third product to the tip speed ratio.

[0025] In combination with the first aspect and the above implementations, in some possible implementations, calculating the heat dissipation power of the fuel cell system according to the real-time rotation speed of the fan and the heat calculation parameter includes:

[0026] Based on a preset relationship between fan speed and heat dissipation power, the heat dissipation power of the fuel cell system is calculated according to the real-time speed of the fan and the heat calculation parameter, wherein the preset relationship between fan speed and heat dissipation power is:

[0027]

[0028] Among them, P h is the heat dissipation power, R is the maximum radius of the fan blade, S air is the heat calculation parameter, λ is the tip speed ratio, c air is the specific heat of air at constant pressure, T cout is the cooling air outlet temperature, T cin is the cooling air inlet temperature, ρ air is the air density, n c is the preset fan speed.

[0029] In combination with the first aspect and the above implementations, in some possible implementations, calculating the target cooling water mass flow rate of the fuel cell system test bench according to the heat dissipation power of the fuel cell system includes:

[0030] Obtain cooling water specific heat capacity, cooling water inlet temperature and cooling water outlet temperature;

[0031] The difference between the cooling water inlet temperature and the cooling water outlet temperature is calculated, and the product of the cooling water specific heat capacity and the difference is calculated, and the target cooling water mass flow rate is obtained according to the ratio of the heat dissipation power and the product.

[0032] In a second aspect, a fuel cell system test bench cooling device is provided, the device comprising:

[0033] An acquisition module, used to acquire the real-time speed and heat calculation parameters of the fan of the fuel cell system;

[0034] a calculation module, configured to calculate the heat dissipation power of the fuel cell system according to the real-time rotation speed of the fan and the heat calculation parameter; and

[0035] The regulating module is used to calculate the target cooling water mass flow rate of the fuel cell system test bench according to the heat dissipation power of the fuel cell system, and regulate the current cooling water flow rate to the target cooling water mass flow rate to dissipate heat for the fuel cell system.

[0036] Optionally, in some possible implementations, the acquisition module includes:

[0037] A first acquisition unit, used to acquire the cooling air flow rate and cooling air inlet flow rate of the fuel cell system;

[0038] The first calculation unit is used to obtain the heat calculation parameter according to the ratio of the cooling air flow rate to the cooling air inlet flow rate.

[0039] Optionally, in some possible implementations, the acquiring unit includes:

[0040] An acquisition subunit is used to acquire coolant mass flow, coolant specific heat capacity, coolant inlet temperature, coolant outlet temperature, cooling air inlet temperature, cooling air outlet temperature, air constant pressure specific heat, air density, blade tip speed ratio and fan blade maximum radius;

[0041] a first calculation subunit, configured to calculate the cooling air flow rate according to the coolant mass flow rate, the coolant specific heat capacity, the coolant inlet temperature, the coolant outlet temperature, the air constant pressure specific heat, the cooling air inlet temperature, the cooling air outlet temperature and the air density;

[0042] The second calculation subunit is used to calculate the cooling air inlet flow rate according to the real-time rotation speed of the fan, the maximum radius of the fan blades and the tip speed ratio.

[0043] Optionally, in some possible implementations, the first computing subunit is specifically configured to:

[0044] Calculating a first difference between the coolant inlet temperature and the coolant outlet temperature, and calculating a first product of the first difference, the coolant mass flow rate, and the coolant specific heat capacity;

[0045] Calculating a second difference between the cooling air inlet temperature and the cooling air outlet temperature, and calculating a second product of the second difference, the air constant pressure specific heat, and the air density;

[0046] The cooling air flow rate is obtained according to a ratio of the first product to the second product.

[0047] Optionally, in some possible implementations, the second computing subunit is specifically configured to:

[0048] Calculating the fan blade angular velocity according to the real-time rotation speed of the fan;

[0049] A third product of the fan blade angular velocity and the maximum radius of the fan blade is calculated, and the cooling air inlet flow rate is obtained according to a ratio of the third product to the tip speed ratio.

[0050] Optionally, in some possible implementations, the computing module is specifically configured to:

[0051] Based on a preset relationship between fan speed and heat dissipation power, the heat dissipation power of the fuel cell system is calculated according to the heat calculation parameter and the real-time speed of the fan, wherein the preset relationship between fan speed and heat dissipation power is:

[0052]

[0053] Among them, P h is the heat dissipation power, R is the maximum radius of the fan blade, S air is the heat calculation parameter, λ is the tip speed ratio, c air is the specific heat of air at constant pressure, T cout is the cooling air outlet temperature, T cin is the cooling air inlet temperature, ρ air is the air density, n c is the preset fan speed.

[0054] Optionally, in some possible implementations, the adjustment module includes:

[0055] A second acquisition unit is used to acquire the cooling water specific heat capacity, the cooling water inlet temperature and the cooling water outlet temperature;

[0056] The second calculation unit is used to calculate the difference between the cooling water inlet temperature and the cooling water outlet temperature, and calculate the product of the cooling water specific heat capacity and the difference, and obtain the target cooling water mass flow rate according to the ratio of the heat dissipation power and the product.

[0057] In a third aspect, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method in the first aspect or any possible implementation manner of the first aspect.

[0058] In a fourth aspect, a computer-readable storage medium is provided, which stores a computer program code. When the computer program code runs on a computer, the computer executes the method in the above-mentioned first aspect or any possible implementation manner of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 is a flow chart of a fuel cell system test bench cooling method provided in an embodiment of the present application;

[0060] Figure 2 is a schematic structural diagram of a fuel cell system cooling module according to an embodiment of the present application;

[0061] Figure 3 is a schematic structural diagram of a laboratory test bench according to another embodiment of the present application;

[0062] Figure 4 is a block diagram of a fuel cell system test bench cooling device provided in an embodiment of the present application;

[0063] Figure 5 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0064] The technical solution in the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0065] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0066] With the continuous progress of material science, manufacturing process and assembly technology in the fuel cell industry, improving power density and durability has become an important trend in the industrial development. At the same time, high power density also puts forward higher requirements for the water-heat management strategy of fuel cells, which plays a key role in the cooling system of fuel cell systems and is also a difficult problem. The main reasons are as follows: (1) Chemical reaction heat generated by the irreversibility of the battery; (2) Joule heat generated by ohmic polarization; (3) Heat brought in by humidified gas; (4) Absorption of ambient radiation heat.

[0067] When the traditional fuel cell system test bench cooling solution uses water cooling, the control strategy is to ensure that the cooling water outlet temperature is at a certain fixed value.

[0068] Obviously, the water cooling strategy cannot adjust the heat dissipation according to the actual heat dissipation requirements of the system, and the use of water cooling and fan cooling will result in inconsistent heat dissipation, which will lead to inconsistent performance results of the same battery system.

[0069] It is precisely based on the above problems that an embodiment of the present application provides a fuel cell system test bench cooling method. The method can solve the problems that the test bench cannot adjust the water cooling of the fuel cell system according to the actual heat dissipation requirements of the system, and uses two heat dissipation methods, namely, bench water cooling and fan cooling, resulting in inconsistent heat dissipation, leading to inconsistent performance results of testing the same battery system. Without adding additional output signals to the battery system, the test bench uses the system fan speed signal to achieve consistent heat dissipation between the bench water cooling and the fan cooling.

[0070] Figure 1 This is a flow chart of a fuel cell system test bench cooling method provided in an embodiment of the present application.

[0071] Before introducing the fuel cell system test bench cooling method proposed in the embodiment of the present application, the structure of the fuel cell system cooling module 10 and the structure of the laboratory bench 20 involved in the embodiment of the present application are first introduced.

[0072] For example, Figure 2As shown, a fuel cell stack 9 and a fuel cell system cooling module 10 used in the fuel cell stack 9 are illustrated, and the fuel cell system cooling module 10 includes: a cooling air outlet temperature sensor 1, used to provide a real-time online value of the cooling air outlet temperature; a cooling air inlet temperature sensor 2, used to provide a real-time online value of the cooling air inlet temperature; a fan radiator and a fan 3; a coolant flow meter 4, used to provide a real-time online value of the coolant mass flow rate; a coolant inlet temperature sensor 5, used to provide a real-time online value of the coolant inlet temperature; a coolant outlet temperature sensor 6, used to provide a real-time online value of the coolant outlet temperature; a coolant bypass valve 7 and a coolant pump 8.

[0073] For example, Figure 3 As shown, the laboratory test bench 20 includes: a target cooling water outlet temperature sensor 11, used to provide a real-time online value of the target cooling water outlet temperature; a target cooling water inlet temperature sensor 12, used to provide a real-time online value of the target cooling water inlet temperature; a mass flow meter 13, used to provide a value of the target cooling water mass flow when dynamically adjusted; a current cooling water inlet temperature sensor 14, used to provide a real-time online value of the current cooling water inlet temperature; a current cooling water outlet temperature sensor 15, used to provide a real-time online value of the current cooling water outlet temperature; a mass flow meter 16, used to provide a real-time online value of the current cooling water mass flow; a cooling water flow actuator 17 and a cooling water flow controller 18, used to adjust the cooling water flow through the plate heat exchanger 19; and the plate heat exchanger 19, a common heat exchange equipment, mainly used to transfer heat between two different media.

[0074] For example, Figure 1 As shown, the fuel cell system test bench cooling method includes the following steps:

[0075] In step S101 , the real-time rotation speed and heat calculation parameters of the fan of the fuel cell system are obtained.

[0076] Optionally, in some embodiments, the real-time rotation speed and heat calculation parameters of the fan of the fuel cell system are obtained, including: obtaining the cooling air flow and cooling air inlet flow rate of the fuel cell system; and obtaining the heat calculation parameters based on the ratio of the cooling air flow and the cooling air inlet flow rate.

[0077] Specifically, as shown in formula (1), the heat calculation parameter S can be obtained according to the ratio of the cooling air flow rate of the fuel cell system to the cooling air inlet flow rate: air :

[0078]

[0079] Among them, v cis the cooling air inlet velocity, in m / s; V c is the cooling air flow rate, in m 3 / s;S air It is a dimensionless heat calculation parameter. When the fuel cell system operates at different power densities, the heat calculation parameter is not much different.

[0080] Furthermore, in some embodiments, the cooling air flow rate and cooling air inlet flow rate of the fuel cell system are obtained, including: obtaining the coolant mass flow rate, coolant specific heat capacity, coolant inlet temperature, coolant outlet temperature, cooling air inlet temperature, cooling air outlet temperature, air constant pressure specific heat, air density, tip speed ratio and fan blade maximum radius; calculating the cooling air flow rate according to the coolant mass flow rate, coolant specific heat capacity, coolant inlet temperature, coolant outlet temperature, air constant pressure specific heat, cooling air inlet temperature, cooling air outlet temperature and air density; calculating the cooling air inlet flow rate according to the real-time speed of the fan, the maximum radius of the fan blades and the tip speed ratio.

[0081] Specifically, combined Figure 1 and Figure 2 In the embodiment of the present application, the mass flow rate of the coolant can be obtained by the coolant flowmeter 4; the specific heat capacity of the coolant is provided by the coolant manufacturer; the coolant inlet temperature can be provided by the coolant inlet temperature sensor 5 to provide its online value; the coolant outlet temperature can be provided by the coolant outlet temperature sensor 6 to provide its online value; the cooling air inlet temperature can be provided by the cooling air inlet temperature sensor 2 to provide its online value; the cooling air outlet temperature can be provided by the cooling air outlet temperature sensor 1 to provide its online value; the constant pressure specific heat of air is a constant, and the constant pressure specific heat of air under standard conditions (0°C, 1 standard atmosphere (1atm)) is 1.004kJ / (kg·°C); the air density is a constant, and under standard conditions, the air density is approximately 1.29kg / m 3 ; The tip speed ratio and the maximum radius of the fan blade are both constant values ​​and can be provided by the fan manufacturer. The cooling air flow rate can be calculated based on the coolant mass flow rate, coolant specific heat capacity, coolant inlet temperature, coolant outlet temperature, air constant pressure specific heat, cooling air inlet temperature, cooling air outlet temperature and air density; the cooling air inlet flow rate can be calculated based on the real-time fan speed, the maximum radius of the fan blade and the tip speed ratio.

[0082] As a possible implementation method, in some embodiments, the cooling air flow rate is calculated based on the coolant mass flow rate, the coolant specific heat capacity, the coolant inlet temperature, the coolant outlet temperature, the air constant pressure specific heat, the cooling air inlet temperature, the cooling air outlet temperature and the air density, including: calculating a first difference between the coolant inlet temperature and the coolant outlet temperature, and calculating a first product of the first difference, the coolant mass flow rate and the coolant specific heat capacity; calculating a second difference between the cooling air inlet temperature and the cooling air outlet temperature, and calculating a second difference, the air constant pressure specific heat and the second product of the air density; obtaining the cooling air flow rate according to the ratio of the first product to the second product.

[0083] Specifically, the first difference between the coolant inlet temperature and the coolant outlet temperature is calculated, and the first product of the first difference, the coolant mass flow rate and the coolant specific heat capacity is calculated, and formula (2) can be obtained:

[0084] P h =c cw (T hin -T hout )·m h ; (2)

[0085] Among them, m h is the coolant mass flow rate, in kg / s; c cw P is the specific heat capacity of the coolant, in J / (kg·℃); h is the heat dissipation power, in W; T hin is the coolant inlet temperature, in °C; T hout is the coolant outlet temperature, in °C.

[0086] Furthermore, a second difference between the cooling air inlet temperature and the cooling air outlet temperature is calculated, and a second product of the second difference, the air constant pressure specific heat, and the air density is calculated, as shown in formula (3):

[0087] c air ·(T cout -T cin )·ρ air ; (3)

[0088] Among them, c air is the specific heat of air at constant pressure, in J / (kg·℃); T cin is the cooling air inlet temperature, in °C; T cout is the cooling air outlet temperature, in °C; ρ air is the air density, in kg / m 3 .

[0089] As shown in formula (4), the cooling air flow rate V can be calculated based on the ratio of the first product to the second product:c :

[0090]

[0091] Optionally, in some embodiments, the cooling air inlet flow rate is calculated based on the real-time rotational speed of the fan, the maximum radius of the fan blades and the tip speed ratio, including: calculating the fan blade angular velocity based on the real-time rotational speed of the fan; calculating the third product of the fan blade angular velocity and the maximum radius of the fan blades, and obtaining the cooling air inlet flow rate based on the ratio of the third product to the tip speed ratio.

[0092] Specifically, the fan blade angular velocity is calculated according to the real-time rotation speed of the fan, as shown in formula (5):

[0093]

[0094] Among them, n c is the real-time speed of the fan, in r / min, which can be obtained through the fan speed feedback signal; ω r is the angular velocity of the fan blades in rad / s.

[0095] The third product of the fan blade angular velocity and the maximum radius of the fan blade is calculated according to formula (6), and the cooling air inlet flow rate is obtained according to the ratio of the third product to the blade tip speed ratio:

[0096]

[0097] Among them, λ is the tip speed ratio, which is a fixed constant provided by the fan manufacturer.

[0098] In step S102, the heat dissipation power of the fuel cell system is calculated according to the real-time rotation speed of the fan and the heat calculation parameter.

[0099] Optionally, in some embodiments, calculating the heat dissipation power of the fuel cell system according to the real-time rotation speed of the fan and the heat calculation parameter includes:

[0100] Based on the preset relationship between fan speed and heat dissipation power, the heat dissipation power of the fuel cell system is calculated according to the real-time fan speed and heat calculation parameters, wherein the preset relationship between fan speed and heat dissipation power is:

[0101]

[0102] Among them, P h is the heat dissipation power, R is the maximum radius of the fan blade, S air is the heat calculation parameter, λ is the tip speed ratio, c air is the specific heat of air at constant pressure, T cout is the cooling air outlet temperature, T cin is the cooling air inlet temperature, ρair is the air density, n c The preset fan speed.

[0103] That is to say, the heat calculation parameter S calculated based on the above steps is air , a preset relationship between fan speed and heat dissipation power can be established, as shown in formula (7). According to the heat calculation parameters and the real-time speed of the fan, the heat dissipation power of the fuel cell system can be calculated.

[0104] In step S103, the target cooling water mass flow rate of the fuel cell system test bench is calculated according to the heat dissipation power of the fuel cell system, and the current cooling water flow rate is adjusted to the target cooling water mass flow rate to dissipate heat for the fuel cell system.

[0105] Optionally, as a possible implementation method, the target cooling water mass flow rate of the fuel cell system test bench is calculated according to the heat dissipation power of the fuel cell system, including: obtaining the cooling water specific heat capacity, the cooling water inlet temperature and the cooling water outlet temperature; calculating the difference between the cooling water inlet temperature and the cooling water outlet temperature, and calculating the product of the cooling water specific heat capacity and the difference, and obtaining the target cooling water mass flow rate according to the ratio of the heat dissipation power and the product.

[0106] Specifically, Figure 3 As shown, the fuel cell test bench 20 is used to dissipate heat for the fuel cell system. The cooling water flow controller 17 and the cooling water flow actuator 18 are used to adjust the cooling water flow through the plate heat exchanger 19. The cooling water flow controller 17 receives the vehicle cooling fan speed signal of the fuel cell system controller (Fuel-cell Control Unit, FCU for short). The cooling water flow controller 17 converts the fan speed signal (the cooling water flow controller 17 uses formulas (1) to (7)) into the heat dissipation power P h The cooling water flow rate m of the test bench is calculated by equation (8) and PID (Proportion-Integral-Derivative) regulation algorithm. lab , thereby sending the cooling water flow signal to the cooling water flow actuator 18.

[0107] P lab =m lab ·c lab ·(T labin -T labout ); (8)

[0108] Among them, P lab The heat dissipation power P of the test bench to the fuel cell system under test calculated by formula (7) h , the unit is W. It should be noted that the current heat dissipation power is only related to the cooling water flow mlab Related; m lab is the cooling water flow rate of the test bench, in kg / s; c lab is the specific heat capacity of cooling water, in J / (kg·℃); T labin is the cooling water inlet temperature, in °C, which can be obtained by the target cooling water inlet temperature sensor 12; T labout is the cooling water outlet temperature, in degrees Celsius, which can be obtained by the target cooling water outlet temperature sensor 11.

[0109] Through PID control algorithm, P lab As the target value, the output control quantity is the target cooling water mass flow rate m of the laboratory test bench. lab , the m obtained by PID adjustment lab The result is sent to the cooling water flow actuator 18 to dynamically adjust the current cooling water flow to the target cooling water mass flow to dissipate heat for the fuel cell system.

[0110] It should be noted that the PID adjustment algorithm here can use a known PID adjustment algorithm. h or P lab It can also be understood as the amount of heat dissipated per unit time. For example, the heat dissipation is the heat dissipation power P. h or P lab The product of time t.

[0111] In summary, the present application can calculate the heat dissipation power of the fuel cell system by obtaining the real-time speed and heat calculation parameters of the fan of the fuel cell system; and calculate the target cooling water mass flow rate of the fuel cell system test bench based on the heat dissipation power, and adjust the current cooling water flow rate to the target cooling water mass flow rate for the fuel cell system to dissipate heat. Therefore, this method can solve the problems that the test bench cannot adjust the water cooling of the fuel cell system according to the actual heat dissipation requirements of the system, and the use of two heat dissipation methods, namely, bench water cooling and fan cooling, resulting in inconsistent heat dissipation, leading to inconsistent performance results of the same battery system. Without adding additional output signals of the battery system, the test bench uses the system fan speed signal to achieve consistent heat dissipation of the bench water cooling and fan cooling.

[0112] Figure 4 It is a block diagram of a fuel cell system test bench cooling device provided in an embodiment of the present application.

[0113] like Figure 4 As shown, the fuel cell system test bench cooling device 30 includes: an acquisition module 100 , a calculation module 200 and an adjustment module 300 .

[0114] Wherein, the acquisition module 100 is used to obtain the real-time speed and heat calculation parameters of the fan of the fuel cell system;

[0115] A calculation module 200, for calculating the heat dissipation power of the fuel cell system according to the real-time rotation speed of the fan and the heat calculation parameter; and

[0116] The regulating module 300 is used to calculate the target cooling water mass flow rate of the fuel cell system test bench according to the heat dissipation power of the fuel cell system, and regulate the current cooling water flow rate to the target cooling water mass flow rate to dissipate heat for the fuel cell system.

[0117] Optionally, in some embodiments, the acquisition module 100 includes:

[0118] A first acquisition unit, used to acquire a cooling air flow rate and a cooling air inlet flow rate of a fuel cell system;

[0119] The first calculation unit is used to obtain a heat calculation parameter according to a ratio of a cooling air flow rate to a cooling air inlet flow rate.

[0120] Optionally, in some embodiments, the acquiring unit includes:

[0121] An acquisition subunit is used to acquire coolant mass flow, coolant specific heat capacity, coolant inlet temperature, coolant outlet temperature, cooling air inlet temperature, cooling air outlet temperature, air constant pressure specific heat, air density, blade tip speed ratio and fan blade maximum radius;

[0122] A first calculation subunit is used to calculate the cooling air flow rate according to the coolant mass flow rate, the coolant specific heat capacity, the coolant inlet temperature, the coolant outlet temperature, the air constant pressure specific heat, the cooling air inlet temperature, the cooling air outlet temperature and the air density;

[0123] The second calculation subunit is used to calculate the cooling air inlet flow rate according to the real-time rotation speed of the fan, the maximum radius of the fan blades and the tip speed ratio.

[0124] Optionally, in some embodiments, the first computing subunit is specifically configured to:

[0125] Calculating a first difference between a coolant inlet temperature and a coolant outlet temperature, and calculating a first product of the first difference, a coolant mass flow rate, and a coolant specific heat capacity;

[0126] Calculating a second difference between the cooling air inlet temperature and the cooling air outlet temperature, and calculating a second product of the second difference, the air constant pressure specific heat, and the air density;

[0127] The cooling air flow rate is obtained according to the ratio of the first product to the second product.

[0128] Optionally, in some embodiments, the second computing subunit is specifically configured to:

[0129] Calculate the fan blade angular velocity based on the real-time fan speed;

[0130] The third product of the fan blade angular velocity and the maximum radius of the fan blade is calculated, and the cooling air inlet flow rate is obtained according to the ratio of the third product to the tip speed ratio.

[0131] Optionally, in some embodiments, the computing module 200 is specifically configured to:

[0132] Based on the preset relationship between fan speed and heat dissipation power, the heat dissipation power of the fuel cell system is calculated according to the heat calculation parameter and the real-time speed of the fan, wherein the preset relationship between fan speed and heat dissipation power is:

[0133]

[0134] Among them, P h is the heat dissipation power, R is the maximum radius of the fan blade, S air is the heat calculation parameter, λ is the tip speed ratio, c air is the specific heat of air at constant pressure, T cout is the cooling air outlet temperature, T cin is the cooling air inlet temperature, ρ air is the air density, n c The preset fan speed.

[0135] Optionally, in some embodiments, the adjustment module 300 includes:

[0136] A second acquisition unit is used to acquire the cooling water specific heat capacity, the cooling water inlet temperature and the cooling water outlet temperature;

[0137] The second calculation unit is used to calculate the difference between the cooling water inlet temperature and the cooling water outlet temperature, and calculate the product of the cooling water specific heat capacity and the difference, and obtain the target cooling water mass flow rate according to the ratio of the heat dissipation power and the product.

[0138] It should be noted that the aforementioned explanation of the fuel cell system test bench cooling method embodiment is also applicable to the fuel cell system test bench cooling device of this embodiment, and will not be repeated here.

[0139] In summary, the present application can calculate the heat dissipation power of the fuel cell system by obtaining the real-time speed and heat calculation parameters of the fan of the fuel cell system; and calculate the target cooling water mass flow rate of the fuel cell system test bench based on the heat dissipation power, and adjust the current cooling water flow rate to the target cooling water mass flow rate for the fuel cell system to dissipate heat. Therefore, this method can solve the problems that the test bench cannot adjust the water cooling of the fuel cell system according to the actual heat dissipation requirements of the system, and the use of two heat dissipation methods, namely, bench water cooling and fan cooling, resulting in inconsistent heat dissipation, leading to inconsistent performance results of the same battery system. Without adding additional output signals of the battery system, the test bench uses the system fan speed signal to achieve consistent heat dissipation of the bench water cooling and fan cooling.

[0140] Figure 5 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0141] It should be understood that the above-described method can be applied to Figure 5 In an electronic device of the structure shown.

[0142] In addition, an embodiment of the present application also protects a device, which may include a memory 501 and a processor 502, wherein the memory 501 stores an executable program code, and the processor 502 is used to call and execute the executable program code to execute the fuel cell system test bench cooling method provided in the embodiment of the present application.

[0143] Furthermore, the electronic device also includes: a communication interface 503 for communication between the memory 501 and the processor 502 .

[0144] It should be understood that the device provided in this embodiment is used to execute the above-mentioned fuel cell system test bench cooling method, and thus can achieve the same effect as the above-mentioned implementation method.

[0145] In the case of an integrated unit, the device may include a processing module and a storage module. When the device is applied to an electronic device, the processing module may be used to control and manage the actions of the electronic device. The storage module may be used to support the electronic device to execute mutual program codes, etc.

[0146] The processing module may be a processor 502 or a controller, which may implement or execute various exemplary logic blocks, modules and circuits disclosed in the present application. The processor 502 may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of digital signal processing and a microprocessor, etc. The storage module may be a memory 501.

[0147] In addition, the device provided in the embodiments of the present application may specifically be a chip, a component or a module, and the chip may include a connected processor 502 and a memory 501; wherein the memory 501 is used to store instructions, and when the processor 502 calls and executes the instructions, the chip can execute the fuel cell system test bench cooling method provided in the above embodiments.

[0148] This embodiment also provides a computer-readable storage medium, in which a computer program code is stored. When the computer program code is executed on a computer, the computer executes the above-mentioned related method steps to implement the fuel cell system test bench cooling method provided in the above embodiment.

[0149] Among them, the device, computer-readable storage medium or chip provided in this embodiment is used to execute the corresponding method provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above, and will not be repeated here.

[0150] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0151] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0152] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A fuel cell system test bench cooling method, characterized in that: The following steps are involved: Obtain the real-time speed and heat calculation parameters of the fan of the fuel cell system; Calculating the heat dissipation power of the fuel cell system according to the real-time rotation speed of the fan and the heat calculation parameter; as well as The target cooling water mass flow rate of the fuel cell system test bench is calculated according to the heat dissipation power of the fuel cell system, and the current cooling water flow rate is adjusted to the target cooling water mass flow rate to dissipate heat for the fuel cell system.

2. The method according to claim 1, characterized in that The step of obtaining the real-time rotation speed and heat calculation parameters of the fan of the fuel cell system includes: Obtaining a cooling air flow rate and a cooling air inlet flow rate of the fuel cell system; The heat calculation parameter is obtained according to a ratio of the cooling air flow rate to the cooling air inlet flow rate.

3. The method according to claim 2, characterized in that The obtaining of the cooling air flow rate and cooling air inlet flow rate of the fuel cell system comprises: Obtain coolant mass flow rate, coolant specific heat capacity, coolant inlet temperature, coolant outlet temperature, cooling air inlet temperature, cooling air outlet temperature, air constant pressure specific heat, air density, blade tip speed ratio and fan blade maximum radius; Calculate the cooling air flow rate according to the coolant mass flow rate, the coolant specific heat capacity, the coolant inlet temperature, the coolant outlet temperature, the air constant pressure specific heat, the cooling air inlet temperature, the cooling air outlet temperature and the air density; The cooling air inlet flow rate is calculated based on the real-time rotation speed of the fan, the maximum radius of the fan blades and the tip speed ratio.

4. The method according to claim 3, characterized in that The step of calculating the cooling air flow rate according to the coolant mass flow rate, the coolant specific heat capacity, the coolant inlet temperature, the coolant outlet temperature, the air constant pressure specific heat, the cooling air inlet temperature, the cooling air outlet temperature and the air density comprises: Calculating a first difference between the coolant inlet temperature and the coolant outlet temperature, and calculating a first product of the first difference, the coolant mass flow rate, and the coolant specific heat capacity; Calculating a second difference between the cooling air inlet temperature and the cooling air outlet temperature, and calculating a second product of the second difference, the air constant pressure specific heat, and the air density; The cooling air flow rate is obtained according to a ratio of the first product to the second product.

5. The method according to claim 3, characterized in that: The step of calculating the cooling air inlet flow rate according to the real-time rotation speed of the fan, the maximum radius of the fan blades and the tip speed ratio comprises: Calculating the fan blade angular velocity according to the real-time rotation speed of the fan; A third product of the fan blade angular velocity and the maximum radius of the fan blade is calculated, and the cooling air inlet flow rate is obtained according to a ratio of the third product to the tip speed ratio.

6. The method according to claim 2, characterized in that The step of calculating the heat dissipation power of the fuel cell system according to the real-time rotation speed of the fan and the heat calculation parameter includes: Based on a preset relationship between fan speed and heat dissipation power, the heat dissipation power of the fuel cell system is calculated according to the real-time speed of the fan and the heat calculation parameter, wherein the preset relationship between fan speed and heat dissipation power is: Among them, P h is the heat dissipation power, R is the maximum radius of the fan blade, S air is the heat calculation parameter, λ is the tip speed ratio, c air is the specific heat of air at constant pressure, T cout is the cooling air outlet temperature, T cin is the cooling air inlet temperature, ρ air is the air density, n c is the preset fan speed.

7. The method according to claim 6, characterized in that The step of calculating a target cooling water mass flow rate of a fuel cell system test bench according to the heat dissipation power of the fuel cell system comprises: Obtain cooling water specific heat capacity, cooling water inlet temperature and cooling water outlet temperature; The difference between the cooling water inlet temperature and the cooling water outlet temperature is calculated, and the product of the cooling water specific heat capacity and the difference is calculated, and the target cooling water mass flow rate is obtained according to the ratio of the heat dissipation power and the product.

8. A fuel cell system test bench cooling device, characterized in that: include: An acquisition module, used to acquire the real-time speed and heat calculation parameters of the fan of the fuel cell system; A calculation module, used for calculating the heat dissipation power of the fuel cell system according to the real-time rotation speed of the fan and the heat calculation parameter; as well as The regulating module is used to calculate the target cooling water mass flow rate of the fuel cell system test bench according to the heat dissipation power of the fuel cell system, and regulate the current cooling water flow rate to the target cooling water mass flow rate to dissipate heat for the fuel cell system.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the fuel cell system test bench cooling method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the fuel cell system test bench cooling method according to any one of claims 1 to 7.

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