Fuel cell heat dissipation system temperature control method, fuel cell, vehicle, storage medium, and computer

Abstract

The present application relates to the technical field of fuel cell, in particular to a kind of fuel cell heat dissipation system temperature control method, fuel cell, vehicle, storage medium and computer, the method includes whether the temperature of air filter entrance is ≤first preset temperature, if no, end, if yes, whether the inlet of heat dissipation liquid is <second preset temperature, if no, execute temperature difference judgment, if yes, radiator fan PWM is down-regulated, judge PWM>0, if yes, whether the inlet of heat dissipation liquid is <second preset temperature, if no, then execute temperature difference judgment;Temperature difference judgment is whether the absolute value of the difference between the temperature difference of heat dissipation liquid import and export and target temperature difference is <equal to preset value, if yes, end, if no, then water pump speed is down-regulated, judge whether water pump speed is >minimum speed, if no, end, if yes, then execute temperature difference judgment;The present application can effectively prevent the problem that the inlet temperature of fuel cell system radiator is suddenly reduced to cause the temperature of the stack to be too low and temperature difference to be too large, ensure that the output power of fuel cell system is stable.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, specifically to a method for temperature control of a fuel cell heat dissipation system, a fuel cell, a vehicle, a storage medium, and a computer. Background Technology

[0002] A fuel cell system is a system composed of a series of components, including a fuel cell stack, an air supply module, a hydrogen supply module, and a cooling module. The cooling system is responsible for controlling and adjusting the overall operating temperature of the fuel cell system.

[0003] The cooling system of a fuel cell engine relies on a manufacturer-defined cooling strategy, which is generally regulated by a water pump, a three-way valve in the water circuit, and a radiator fan. While it can react promptly to temperature changes under steady-state conditions, its temperature control is somewhat delayed in the event of sudden temperature fluctuations caused by external conditions. Therefore, adjusting the parameters of each component in advance based on external conditions can effectively avoid drastic temperature changes, thereby maximizing engine output power and lifespan.

[0004] When a vehicle equipped with a fuel cell system is in operation, a sudden influx of cold air can cause a sharp drop in the temperature of the cooling outlet water, which in turn causes a decrease in the overall water temperature of the fuel cell system, resulting in fluctuations or a decrease in the power output of the fuel cell system. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a fuel cell heat dissipation system temperature control method, fuel cell, vehicle, storage medium and computer, which reduces the impact of low stack heat dissipation fluid inlet temperature and large temperature difference between stack heat dissipation fluid inlet and outlet on stack output power by controlling the PWM (duty cycle) of the radiator fan and the speed of the water pump.

[0006] To solve the above-mentioned technical problems, the first technical solution adopted by the present invention is as follows:

[0007] A method for temperature control of a fuel cell cooling system, wherein the fuel cell includes a stack, the stack having an air filter inlet, a coolant inlet, and a coolant outlet, and the cooling system is connected between the coolant inlet and the coolant outlet; the cooling system includes a water pump and a radiator fan; the method includes...

[0008] If the temperature at the air filter inlet is less than or equal to the first preset temperature, the process ends. If it is ...

[0009] The temperature difference judgment is determined by whether the absolute value of the difference between the temperature difference between the inlet and outlet of the heat sink and the target temperature difference between the inlet and outlet of the heat sink under the current power is less than or equal to a preset value. If yes, the process ends; otherwise, the target water pump speed is reduced, and it is determined whether the target water pump speed is greater than the minimum allowable water pump speed under the current power. If no, the process ends; otherwise, the temperature difference judgment is performed.

[0010] Furthermore, the first preset temperature is the calibrated minimum temperature at the air filter inlet to prevent a sudden drop in the inlet temperature.

[0011] Furthermore, the second preset temperature is the target heat dissipation fluid inlet temperature minus 2.

[0012] Furthermore, the PWM value of the heatsink fan is reduced by 1.

[0013] Furthermore, the target water pump speed is reduced by 100 rpm.

[0014] To solve the above-mentioned technical problems, the second technical solution adopted by the present invention is as follows:

[0015] A fuel cell includes a controller that performs the above-described fuel cell heat dissipation system temperature control method.

[0016] To solve the above-mentioned technical problems, the third technical solution adopted by the present invention is as follows:

[0017] A vehicle comprising the aforementioned fuel cell.

[0018] To solve the above-mentioned technical problems, the fourth technical solution adopted by the present invention is as follows:

[0019] A storage medium storing a computer program, which, when executed by a processor, implements the above-described temperature control method for a fuel cell heat dissipation system.

[0020] To solve the above-mentioned technical problems, the fifth technical solution adopted by the present invention is as follows:

[0021] A computer, comprising at least a memory and a processor, wherein the memory stores a computer program, characterized in that the processor, when executing the computer program in the memory, implements the above-described temperature control method for a fuel cell heat dissipation system.

[0022] The beneficial effects of this invention are as follows: the control method of this application can effectively prevent the fuel cell system radiator inlet temperature from dropping sharply, resulting in excessively low stack inlet temperature and excessive temperature difference, thus ensuring stable output power of the fuel cell system and enhancing the stack's ability to resist excessively low external temperatures; it effectively avoids drastic temperature changes, thereby maximizing stable power output and service life of the engine. Attached Figure Description

[0023] Figure 1 This is a logic block diagram of a temperature control method for a heat dissipation system of a battery according to a specific embodiment of the present invention. Detailed Implementation

[0024] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0025] Example 1

[0026] Please refer to Figure 1 A method for temperature control of a fuel cell heat dissipation system, wherein the fuel cell includes a stack, the stack having an air filter inlet, a coolant inlet, and a coolant outlet, and the heat dissipation system is connected between the coolant inlet and the coolant outlet; the heat dissipation system includes a water pump and a radiator fan; the method includes...

[0027] Determine whether the temperature t at the air filter inlet is less than or equal to the first preset temperature t0. If not, end the process. If yes, determine whether the temperature at the coolant inlet is less than the second preset temperature. If not, perform temperature difference judgment. If yes, reduce the PWM value of the radiator fan by 1 and determine whether the PWM value of the radiator fan is greater than 0. If yes, re-determine whether the temperature at the coolant inlet is less than the second preset temperature. If not, perform temperature difference judgment.

[0028] The temperature difference judgment is determined by whether the absolute value of the difference between the temperature difference Δt between the inlet and outlet of the heat sink and the target temperature difference Δt0 between the inlet and outlet of the heat sink under the current power is less than or equal to 2 (|Δt-Δt0|≤2). If yes, the process ends; otherwise, the target water pump speed is reduced by 100 rpm, and it is determined whether the target water pump speed is greater than the minimum allowable water pump speed under the current power. If no, the process ends; otherwise, the temperature difference judgment is re-executed.

[0029] in

[0030] The first preset temperature t0 is the calibrated minimum inlet temperature of the air filter to prevent a sudden drop in the inlet temperature.

[0031] The second preset temperature is the target heat dissipation fluid inlet temperature minus 2°C.

[0032] Example 2

[0033] A fuel cell includes a controller that executes the temperature control method for a fuel cell heat dissipation system as described in Embodiment 1.

[0034] Example 3

[0035] A vehicle comprising the fuel cell described in Embodiment 2.

[0036] Example 4

[0037] A storage medium storing a computer program, which, when executed by a processor, implements the temperature control method for the fuel cell heat dissipation system described in Embodiment 1.

[0038] Example 5

[0039] A computer includes at least a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program in the memory to implement the temperature control method for the fuel cell heat dissipation system described in Embodiment 1.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for temperature control of a fuel cell heat dissipation system, wherein the fuel cell includes a stack, the stack having an air filter inlet, a heat dissipation fluid inlet and a heat dissipation fluid outlet, and the heat dissipation system is connected between the heat dissipation fluid inlet and the heat dissipation fluid outlet; The cooling system includes a water pump and a radiator fan; Its features are, The method includes determining whether the temperature at the air filter inlet is less than or equal to a first preset temperature. If not, the process ends. If it is, the method determines whether the temperature at the coolant inlet is less than a second preset temperature. If not, the method performs a temperature difference judgment. If it is, the PWM value of the radiator fan is lowered, and the method determines whether the PWM value of the radiator fan is greater than 0. If it is, the method re-determines whether the temperature at the coolant inlet is less than the second preset temperature. If not, the method performs a temperature difference judgment. The temperature difference judgment is determined by whether the absolute value of the difference between the temperature difference between the inlet and outlet of the heat dissipation fluid and the target temperature difference between the inlet and outlet of the heat dissipation fluid under the current power is less than or equal to a preset value. If yes, the process ends; otherwise, the target water pump speed is reduced, and it is determined whether the target water pump speed is greater than the minimum allowable water pump speed under the current power. If no, the process ends; otherwise, the temperature difference judgment is performed. The first preset temperature is the calibrated minimum temperature at the air filter inlet to prevent a sudden drop in the inlet temperature.

2. The temperature control method for a fuel cell heat dissipation system according to claim 1, characterized in that, The second preset temperature is the target heat dissipation fluid inlet temperature minus 2.

3. The temperature control method for a fuel cell heat dissipation system according to claim 1, characterized in that, The PWM value of the heatsink fan is reduced by 1.

4. The temperature control method for a fuel cell heat dissipation system according to claim 1, characterized in that, The target water pump speed is reduced by 100 rpm.

5. A fuel cell, characterized in that, Includes a controller that executes the temperature control method for the fuel cell heat dissipation system according to any one of claims 1-4.

6. A vehicle, characterized in that, Includes the fuel cell described in claim 5.

7. A storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the temperature control method for the fuel cell heat dissipation system according to any one of claims 1-4.

8. A computer, comprising at least a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program on the memory, it implements the temperature control method for the fuel cell heat dissipation system according to any one of claims 1-4.

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