A method, system, vehicle, computer, and storage medium for identifying a fuel cell coolant

Abstract

The application relates to the technical field of fuel cells, in particular to a fuel cell cooling liquid identification method, system, vehicle, computer and storage medium, the method comprises the following steps: when a fuel cell starting instruction is received, firstly, recording the cooling liquid temperature t1 of the electric pile outlet, and then executing a starting process; after the fuel cell enters a running state, according to the temperature rise of the cooling liquid, the theoretical heat generation of the electric pile Q0 is calculated in real time according to the hot melting C1 of the antifreeze, Q0 = C1 x m1 x Delta t; the actual heat generation Q1 of the electric pile is calculated, Q1 = integral ((E0-V) x I x dt); if Q0-Q1>Delta Q, it is determined that the cooling liquid used by the current electric pile is pure water, otherwise it is antifreeze; the application compares the theoretical heat with the actual heat, identifies the type of the cooling liquid, and can facilitate users or service personnel to make further selection according to the needs.

Description

Technical Field

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

[0002] As the environmental pollution caused by traditional automobiles becomes increasingly serious, fuel cell vehicles, with their advantages of high efficiency, zero pollution, and long driving range, are becoming more and more well-known. The basic working principle of a fuel cell is that hydrogen and oxygen undergo an electrochemical reaction in the presence of a catalyst, converting chemical energy into electrical energy, with water as the only byproduct. While generating electricity, the fuel cell also generates heat, which needs to be carried away by a coolant and dissipated through various methods. The coolant is typically pure water or antifreeze. Pure water is cheaper but can only be used in warm weather, while antifreeze is more expensive but can be used in cold winters. Southern cities, where temperatures are below freezing for a short period each year, prefer pure water as a coolant, while northern cities use antifreeze more often. However, many users occasionally use pure water for vehicle maintenance in warmer weather. With increasingly drastic climate change, both the south and the north will experience low-temperature environments. If the antifreeze is not replaced in time, the fuel cell stack risks freezing and damage.

[0003] Currently, there is no effective solution for automatically identifying coolant. Generally, after-sales personnel (who usually don't remember which type of antifreeze they used, and after-sales personnel also can't remember which antifreeze each vehicle used) conduct regular inspections to measure the freezing point of the coolant. If the freezing point is too high, the antifreeze needs to be replaced in time.

[0004] However, manual inspection is inefficient, and if there are too many vehicles, some will inevitably be missed. If some vehicles are missed, the risk of the fuel cell stack freezing when the temperature drops is extremely high, causing unnecessary economic losses. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method, system, vehicle, computer and storage medium for identifying fuel cell coolant types, which can help users make timely decisions on whether to replace the coolant.

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

[0007] A method for identifying fuel cell coolant, including

[0008] Upon receiving the fuel cell start command, the coolant temperature t1 at the stack outlet is first recorded, and then the start-up process is executed.

[0009] Once the fuel cell enters the operating state, based on the temperature rise of the coolant, the theoretical heat generation of the stack is calculated in real time according to the heat melting C1 of the antifreeze, Q0 = C1 × m1 × Δt, where m1 is the mass of the antifreeze and Δt is the temperature change.

[0010] Calculate the actual heat generation of the fuel cell stack: Q1 = ∫(E0-V)×I×dt; E0 is the theoretical voltage of the fuel cell, V is the fuel cell voltage, and I is the fuel cell current.

[0011] If Q0 - Q1 > ΔQ, where ΔQ is the set deviation threshold, then the coolant used in the current fuel cell stack is determined to be pure water; otherwise, it is antifreeze.

[0012] Preferably, the lowest temperature T for the next few days is obtained;

[0013] If T < 0℃ and the coolant currently used in the fuel cell stack is pure water, then a reminder is given to replace the coolant.

[0014] Beneficial effects: By automatically determining whether the coolant needs to be replaced, the steps of manual judgment can be reduced, labor costs can be lowered, the possibility of human error can be reduced, the number of missed detections can be reduced, and thus the risk of the fuel cell stack freezing and being damaged can be reduced.

[0015] To solve the above-mentioned technical problems, the second technical solution adopted by the present invention is as follows:

[0016] A fuel cell coolant identification system includes a fuel cell stack and a controller, wherein a temperature sensor is provided on the coolant outlet of the fuel cell stack; the temperature sensor is electrically connected to the controller.

[0017] The controller performs the aforementioned fuel cell coolant identification method;

[0018] The t1 is obtained by a temperature sensor.

[0019] To solve the above-mentioned technical problems, the third technical solution adopted by the present invention is as follows:

[0020] A vehicle including the aforementioned fuel cell coolant identification system.

[0021] To solve the above-mentioned technical problems, the fourth technical solution adopted by the present invention is as follows:

[0022] A computer, comprising a processor and memory;

[0023] The memory is used to store computer instructions, and the processor is used to run the computer instructions stored in the memory to implement the above-described method for identifying fuel cell coolant.

[0024] To solve the above-mentioned technical problems, the fifth technical solution adopted by the present invention is as follows:

[0025] A computer-readable storage medium storing one or more programs that can be executed by one or more processors to implement the above-described method for identifying fuel cell coolant.

[0026] The beneficial effects of this invention are as follows: By comparing the theoretical heat with the actual heat, if the difference between the two is greater than a preset value ΔQ, it is considered that pure water is used as the coolant. The principle is as follows: the heat capacity of pure water is 4.2 kJ / (kg*℃), and the heat capacity of antifreeze for fuel cell engines is 3.2 kJ / (kg*℃). According to the heat calculation formula: Q=C*m*Δt, where C is the specific heat capacity, m is the mass, and Δt is the temperature change. The density of antifreeze is close to that of pure water, and the mass difference between the same volume of antifreeze and pure water can be ignored. Therefore, when the fuel cell engine is raised to the same temperature, pure water absorbs more heat than antifreeze. Therefore, by calculating the heat absorbed by the coolant when the temperature is raised by the same amount, and comparing the difference between the actual absorbed heat and the theoretical absorbed heat, it is possible to identify whether the coolant in the fuel cell stack is water or antifreeze. By identifying the type of coolant, users or service personnel can make further selections according to their needs. Attached Figure Description

[0027] Figure 1 This is a flowchart illustrating a method for identifying fuel cell coolant according to a specific embodiment of the present invention. Detailed Implementation

[0028] 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.

[0029] Please refer to Figure 1 A method for identifying fuel cell coolant, including

[0030] Upon receiving the fuel cell start command, the coolant temperature t1 at the stack outlet is first recorded, and then the start-up process is executed.

[0031] Once the fuel cell enters the operating state, based on the temperature rise of the coolant, the theoretical heat generation of the stack is calculated in real time according to the heat melting C1 of the antifreeze, Q0 = C1 × m1 × Δt, where m1 is the mass of the antifreeze and Δt is the temperature change.

[0032] Calculate the actual heat generation of the fuel cell stack: Q1 = ∫(E0-V)×I×dt; E0 is the theoretical voltage of the fuel cell, V is the fuel cell voltage, and I is the fuel cell current.

[0033] If Q0 - Q1 > ΔQ, where ΔQ is the set deviation threshold, then the coolant used in the current fuel cell stack is determined to be pure water; otherwise, it is antifreeze.

[0034] As described above, by comparing the theoretical heat capacity with the actual heat capacity, if the difference between the two is greater than the preset value ΔQ, it is considered that pure water is being used as the coolant. The principle is as follows: the heat capacity of pure water is 4.2 kJ / (kg*℃), while the heat capacity of antifreeze for fuel cell engines is 3.2 kJ / (kg*℃). According to the heat calculation formula: Q=C*m*Δt, where C is the specific heat capacity, m is the mass, and Δt is the temperature change. The density of antifreeze is close to that of pure water, and the mass difference between the same volume of antifreeze and pure water is negligible. Therefore, when the fuel cell engine is raised to the same temperature, pure water absorbs more heat than antifreeze. Therefore, by calculating the heat absorbed by the coolant when raised to the same temperature and comparing the difference between the actual absorbed heat and the theoretical absorbed heat, it is possible to identify whether the coolant in the fuel cell stack is water or antifreeze. By identifying the type of coolant, users or service personnel can make further selections based on their needs.

[0035] Furthermore, obtain the lowest temperature T for the next few days;

[0036] If T < 0℃ and the coolant currently used in the fuel cell stack is pure water, then a reminder is given to replace the coolant.

[0037] As can be seen from the above description, by automatically determining whether the coolant needs to be replaced, the steps of manual judgment can be reduced, labor costs can be lowered, the possibility of human error can be reduced, the number of missed detections can be reduced, and thus the risk of the fuel cell stack freezing and being damaged can be reduced.

[0038] A fuel cell coolant identification system includes a fuel cell stack and a controller, wherein a temperature sensor is provided on the coolant outlet of the fuel cell stack; the temperature sensor is electrically connected to the controller.

[0039] The controller performs the aforementioned fuel cell coolant identification method;

[0040] The t1 is obtained by a temperature sensor.

[0041] A vehicle including the aforementioned fuel cell coolant identification system.

[0042] A computer, comprising a processor and memory;

[0043] The memory is used to store computer instructions, and the processor is used to run the computer instructions stored in the memory to implement the above-described method for identifying fuel cell coolant.

[0044] A computer-readable storage medium storing one or more programs that can be executed by one or more processors to implement the above-described method for identifying fuel cell coolant.

[0045] Example 1

[0046] A method for identifying fuel cell coolant, including

[0047] Obtain the lowest temperature T for the next few days;

[0048] Upon receiving the fuel cell start command, the coolant temperature t1 at the stack outlet is first recorded, and then the start-up process is executed.

[0049] Once the fuel cell enters the operating state, based on the temperature rise of the coolant, the theoretical heat generation of the stack is calculated in real time according to the heat melting C1 of the antifreeze, Q0 = C1 × m1 × Δt, where m1 is the mass of the antifreeze and Δt is the temperature change.

[0050] The actual heat generation of the fuel cell stack is calculated as Q1 = ∫(E0-V)×I×dt; E0 is the theoretical voltage of the fuel cell, which is taken as 1.25V, V is the fuel cell voltage, and I is the fuel cell current.

[0051] If Q0 - Q1 > ΔQ, where ΔQ is the set deviation threshold, then the coolant used in the current fuel cell stack is determined to be pure water; otherwise, it is antifreeze.

[0052] If T < 0℃ and the coolant currently used in the fuel cell stack is pure water, then a reminder is given to replace the coolant.

[0053] Example 2

[0054] A fuel cell coolant identification system includes a fuel cell stack and a controller, wherein a temperature sensor is provided on the coolant outlet of the fuel cell stack; the temperature sensor is electrically connected to the controller.

[0055] The controller executes the fuel cell coolant identification method described in Embodiment 1;

[0056] The t1 is obtained by a temperature sensor.

[0057] Example 3

[0058] A vehicle including the fuel cell coolant identification system described in Example 2.

[0059] Example 4

[0060] A computer, comprising a processor and memory;

[0061] The memory is used to store computer instructions, and the processor is used to run the computer instructions stored in the memory to implement the fuel cell coolant identification method described in Embodiment 1.

[0062] Example 5

[0063] A computer-readable storage medium storing one or more programs that can be executed by one or more processors to implement the fuel cell coolant identification method described in Embodiment 1.

[0064] 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 identifying fuel cell coolant, characterized in that, include Upon receiving the fuel cell start command, the coolant temperature t1 at the stack outlet is first recorded, and then the start-up process is executed. Once the fuel cell enters the operating state, based on the temperature rise of the coolant, the theoretical heat generation of the stack is calculated in real time according to the heat melting C1 of the antifreeze, Q0 = C1 × m1 × Δt, where m1 is the mass of the antifreeze and Δt is the temperature change. Calculate the actual heat generation of the fuel cell stack: Q1 = ∫(E0-V)×I×dt; E0 is the theoretical voltage of the fuel cell, V is the fuel cell voltage, and I is the fuel cell current. If Q0 - Q1 > ΔQ, where ΔQ is the set deviation threshold, then the coolant used in the current fuel cell stack is determined to be pure water; otherwise, it is antifreeze.

2. The method for identifying fuel cell coolant according to claim 1, characterized in that, Obtain the lowest temperature T for the next few days; If T < 0℃ and the coolant currently used in the fuel cell stack is pure water, then a reminder is given to replace the coolant.

3. A fuel cell coolant identification system, characterized in that, It includes a fuel cell stack and a controller, wherein a temperature sensor is installed on the coolant outlet of the fuel cell stack; the temperature sensor is electrically connected to the controller. The controller performs the fuel cell coolant identification method according to any one of claims 1-2; The t1 is obtained by a temperature sensor.

4. A vehicle, characterized in that, Includes the fuel cell coolant identification system as described in claim 3.

5. A computer, characterized in that, Including processor and memory; The memory is used to store computer instructions, and the processor is used to run the computer instructions stored in the memory to implement the fuel cell coolant identification method according to any one of claims 1-2.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores one or more programs, which can be executed by one or more processors to implement the fuel cell coolant identification method according to any one of claims 1-2.

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